# HG changeset patch
# User Edouard Tisserant
# Date 1600335022 -7200
# Node ID 6ea4b7e1a9ed5c25dfd070227118507b42cf5852
# Parent  6dd617cc9c050afc57ea631d23d071e965609a2d# Parent  696301e869d56c1acb009346c93a6b88deb28f4f
Merge + fix side effects of making warning instead of errors in case of missing HMI variable

diff -r 696301e869d5 -r 6ea4b7e1a9ed docutil/docsvg.py
--- a/docutil/docsvg.py	Wed Sep 16 09:42:26 2020 +0200
+++ b/docutil/docsvg.py	Thu Sep 17 11:30:22 2020 +0200
@@ -34,16 +34,23 @@
     if wx.Platform == '__WXMSW__':
         from six.moves import winreg
         try:
-            svgexepath = winreg.QueryValue(winreg.HKEY_LOCAL_MACHINE,
-                                           'Software\\Classes\\svgfile\\shell\\Inkscape\\command')
+                svgexepath = winreg.QueryValue(winreg.HKEY_LOCAL_MACHINE,
+                                               'Software\\Classes\\svgfile\\shell\\Inkscape\\command')
         except OSError:
-            svgexepath = winreg.QueryValue(winreg.HKEY_LOCAL_MACHINE,
-                                           'Software\\Classes\\inkscape.svg\\shell\\open\\command')
+            try:
+                svgexepath = winreg.QueryValue(winreg.HKEY_LOCAL_MACHINE,
+                                               'Software\\Classes\\inkscape.svg\\shell\\open\\command')
+            except Exception:
+                return None
+
         svgexepath = svgexepath.replace('"%1"', '').strip()
         return svgexepath.replace('"', '')
     else:
-        # TODO: search path
-        return os.path.join("/usr/bin", "inkscape")
+        # TODO: search for inkscape in $PATH
+        svgexepath = os.path.join("/usr/bin", "inkscape")
+        if os.path.exists(svgexepath):
+            return svgexepath
+        return None
 
 
 def open_win_svg(svgexepath, svgfile):
diff -r 696301e869d5 -r 6ea4b7e1a9ed modbus/mb_runtime.c
--- a/modbus/mb_runtime.c	Wed Sep 16 09:42:26 2020 +0200
+++ b/modbus/mb_runtime.c	Thu Sep 17 11:30:22 2020 +0200
@@ -28,6 +28,7 @@
 #include <errno.h>
 #include <time.h>
 #include <signal.h>
+#include <unistd.h>  /* required for pause() */
 #include "mb_slave_and_master.h"
 #include "MB_%(locstr)s.h"
 
@@ -328,7 +329,7 @@
 		/*
 		struct timespec cur_time;
 		clock_gettime(CLOCK_MONOTONIC, &cur_time);
-		fprintf(stderr, "Modbus client thread - new cycle (%%ld:%%ld)!\n", cur_time.tv_sec, cur_time.tv_nsec);
+		fprintf(stderr, "Modbus client thread (%%d) - new cycle (%%ld:%%ld)!\n", client_node_id, cur_time.tv_sec, cur_time.tv_nsec);
 		*/
 		int req;
 		for (req=0; req < NUMBER_OF_CLIENT_REQTS; req ++){
@@ -345,8 +346,10 @@
             if ((client_requests[req].flag_exec_req == 0) && (client_nodes[client_requests[req].client_node_id].periodic_act == 0))
                 continue;
             
-            //fprintf(stderr, "Modbus plugin: RUNNING<###> of Modbus request %%d  (periodic = %%d  flag_exec_req = %%d)\n", 
-            //        req, client_nodes[client_requests[req].client_node_id].periodic_act, client_requests[req].flag_exec_req );
+            /*
+            fprintf(stderr, "Modbus client thread (%%d): RUNNING Modbus request %%d  (periodic = %%d  flag_exec_req = %%d)\n", 
+                    client_node_id, req, client_nodes[client_requests[req].client_node_id].periodic_act, client_requests[req].flag_exec_req );
+            */
             
 			int res_tmp = __execute_mb_request(req);
 			switch (res_tmp) {
@@ -433,102 +436,76 @@
 
 
 
-/* Function to activate a client node's thread */
-/* returns -1 if it could not send the signal */
-static int __signal_client_thread(int client_node_id) {
-    /* We TRY to signal the client thread.
-     * We do this because this function can be called at the end of the PLC scan cycle
-     * and we don't want it to block at that time.
-     */
-    if (pthread_mutex_trylock(&(client_nodes[client_node_id].mutex)) != 0)
-        return -1;
-    client_nodes[client_node_id].execute_req = 1; // tell the thread to execute
-    pthread_cond_signal (&(client_nodes[client_node_id].condv));
-    pthread_mutex_unlock(&(client_nodes[client_node_id].mutex));
-    return 0;
-}
-
-
-
-/* Function that will be called whenever a client node's periodic timer expires. */
-/* The client node's thread will be waiting on a condition variable, so this function simply signals that 
- * condition variable.
+
+
+/* Thread that simply implements a periodic 'timer',
+ *  i.e. periodically sends signal to the  thread running __mb_client_thread()
  * 
- * The same callback function is called by the timers of all client nodes. The id of the client node
- * in question will be passed as a parameter to the call back function.
+ * Note that we do not use a posix timer (timer_create() ) because there doesn't seem to be a way
+ * of having the timer notify the thread that is portable across Xenomai and POSIX.
+ * - SIGEV_THREAD    : not supported by Xenomai
+ * - SIGEV_THREAD_ID : Linux specific (i.e. non POSIX)
+ *                     Even so, I did not get it to work under Linux (issues with the header files)
+ * - SIGEV_SIGNAL    : Will not work, as signal is sent to random thread in process!
  */
-void __client_node_timer_callback_function(int client_node_id) {
-    /* signal the client node's condition variable on which the client node's thread should be waiting... */
-    /* Since the communication cycle is run with the mutex locked, we use trylock() instead of lock() */
-    if (pthread_mutex_trylock (&(client_nodes[client_node_id].mutex)) != 0)
-        /* we never get to signal the thread for activation. But that is OK.
-         * If it still in the communication cycle (during which the mutex is kept locked)
-         * then that means that the communication cycle is falling behing in the periodic 
-         * communication cycle, and we therefore need to skip a period.
+static void *__mb_client_timer_thread(void *_index) {
+	int client_node_id = (char *)_index - (char *)NULL; // Use pointer arithmetic (more portable than cast)
+	struct timespec next_cycle;
+
+	int period_sec  =  client_nodes[client_node_id].comm_period / 1000;          /* comm_period is in ms */
+	int period_nsec = (client_nodes[client_node_id].comm_period %%1000)*1000000; /* comm_period is in ms */
+
+	// Enable thread cancelation. Enabled is default, but set it anyway to be safe.
+	pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
+    
+    if (client_nodes[client_node_id].comm_period <= 0) {
+        // No periodic activation required => nothing to do! 
+        while (1) pause(); // wait to be canceled when program terminates (shutdown() is called)
+        return NULL;  // not really necessary, just makes it easier to understand the code.
+    }
+
+	// get the current time
+	clock_gettime(CLOCK_MONOTONIC, &next_cycle);
+
+    while(1) {
+        // Determine absolute time instant for starting the next cycle
+        struct timespec prev_cycle, now;
+        prev_cycle = next_cycle;
+        timespec_add(next_cycle, period_sec, period_nsec);
+                
+        /* NOTE:
+         * It is probably un-necessary to check for overflow of timer!
+         * Even in 32 bit systems this will take at least 68 years since the computer booted
+         * (remember, we are using CLOCK_MONOTONIC, which should start counting from 0
+         * every time the system boots). On 64 bit systems, it will take over 
+         * 10^11 years to overflow.
          */
-        return;
-    client_nodes[client_node_id].execute_req  = 1; // tell the thread to execute
-    client_nodes[client_node_id].periodic_act = 1; // tell the thread the activation was done by periodic timer   
-    pthread_cond_signal (&(client_nodes[client_node_id].condv));
-    pthread_mutex_unlock(&(client_nodes[client_node_id].mutex));
-}
-
-
-
-static int stop_mb_client_timer_thread;
-static void *__mb_client_timer_thread(void *_index) {
-    sigset_t set;
-    int signum;
-    sigemptyset(&set);
-    sigaddset(&set, SIGALRM);
-
-	int client_node_id = (char *)_index - (char *)NULL; // Use pointer arithmetic (more portable than cast)
-    /* initialize the timer that will be used to periodically activate the client node */
-    {
-        // start off by reseting the flag that will be set whenever the timer expires
-        client_nodes[client_node_id].periodic_act = 0;
-
-        if (timer_create(CLOCK_REALTIME, NULL, &(client_nodes[client_node_id].timer_id)) < 0) {
-            fprintf(stderr, "Modbus plugin: Error (%%s) creating timer for modbus client node %%s\n", strerror(errno), client_nodes[client_node_id].location);
-            return NULL;
+        clock_gettime(CLOCK_MONOTONIC, &now);
+        if (next_cycle.tv_sec < prev_cycle.tv_sec) {
+           /* Timer overflow. See NOTE B above */
+            next_cycle = now;
+            timespec_add(next_cycle, period_sec, period_nsec);
+        }
+        
+        while (0 != clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &next_cycle, NULL));
+        
+        /* signal the client node's condition variable on which the client node's thread should be waiting... */
+        /* Since the communication cycle is run with the mutex locked, we use trylock() instead of lock() */
+        if (pthread_mutex_trylock (&(client_nodes[client_node_id].mutex)) == 0) {
+            client_nodes[client_node_id].execute_req  = 1; // tell the thread to execute
+            client_nodes[client_node_id].periodic_act = 1; // tell the thread the activation was done by periodic timer   
+            pthread_cond_signal (&(client_nodes[client_node_id].condv));
+            pthread_mutex_unlock(&(client_nodes[client_node_id].mutex));
+        } else {
+            /* We never get to signal the thread for activation. But that is OK.
+             * If it still in the communication cycle (during which the mutex is kept locked)
+             * then that means that the communication cycle is falling behing in the periodic 
+             * communication cycle, and we therefore need to skip a period.
+             */
         }
     }
 
-	int period_sec  =  client_nodes[client_node_id].comm_period / 1000;          /* comm_period is in ms */
-	int period_nsec = (client_nodes[client_node_id].comm_period %%1000)*1000000; /* comm_period is in ms */
-
-	// configure the timer for periodic activation
-    {
-      struct itimerspec timerspec;
-      timerspec.it_interval.tv_sec  = period_sec;
-      timerspec.it_interval.tv_nsec = period_nsec;
-      timerspec.it_value            = timerspec.it_interval;
-      
-      if (timer_settime(client_nodes[client_node_id].timer_id, 0 /* flags */, &timerspec, NULL) < 0)
-        fprintf(stderr, "Modbus plugin: Error configuring periodic activation timer for Modbus client %%s.\n", client_nodes[client_node_id].location);          
-    }
-
-    stop_mb_client_timer_thread = 0;
-    while(!stop_mb_client_timer_thread) {
-        if(sigwait (&set, &signum) == -1)
-            perror ("sigwait");
-
-        if(stop_mb_client_timer_thread)
-            break;
-
-        if(signum == SIGALRM)
-            __client_node_timer_callback_function(client_node_id);
-        else
-            fprintf(stderr, "Modbus plugin: spurious wakeup of timer thread for Modbus client %%s.\n", client_nodes[client_node_id].location);          
-
-    }
-
-    // timer was created, so we try to destroy it!
-    int res = timer_delete(client_nodes[client_node_id].timer_id);
-    if (res < 0)
-        fprintf(stderr, "Modbus plugin: Error destroying timer for modbus client node %%s\n", client_nodes[client_node_id].location);
-
-    return NULL;
+    return NULL; // humour the compiler -> will never be executed!
 }
 
 
@@ -740,13 +717,26 @@
          */
         if ((client_requests[index].flag_exec_req != 0) && (0 == client_requests[index].flag_exec_started)) {
             int client_node_id = client_requests[index].client_node_id;
-            if (__signal_client_thread(client_node_id) >= 0) {
-                /* - upon success, set flag_exec_started
-                 * - both flags (flag_exec_req and flag_exec_started) will be reset
-                 *   once the transaction has completed.
-                 */
-                client_requests[index].flag_exec_started = 1;    
-            }
+            
+             /* We TRY to signal the client thread.
+              * We do this because this function can be called at the end of the PLC scan cycle
+              * and we don't want it to block at that time.
+              */
+             if (pthread_mutex_trylock(&(client_nodes[client_node_id].mutex)) == 0) {
+                 client_nodes[client_node_id].execute_req = 1; // tell the thread to execute
+                 pthread_cond_signal (&(client_nodes[client_node_id].condv));
+                 pthread_mutex_unlock(&(client_nodes[client_node_id].mutex));
+                 /* - upon success, set flag_exec_started
+                  * - both flags (flag_exec_req and flag_exec_started) will be reset
+                  *   once the transaction has completed.
+                  */
+                 client_requests[index].flag_exec_started = 1;    
+             } else {
+                 /* The mutex is locked => the client thread is currently executing MB transactions.
+                  * We will try to activate it in the next PLC cycle...
+                  * For now, do nothing.
+                  */
+             }
         }                    
     }
 }
@@ -794,8 +784,8 @@
 
 		close = 0;
 		if (client_nodes[index].init_state >= 4) {
-            stop_mb_client_timer_thread = 1;
-            pthread_kill(client_nodes[index].timer_thread_id, SIGALRM);
+			// timer thread was launched, so we try to cancel it!
+			close  = pthread_cancel(client_nodes[index].timer_thread_id);
 			close |= pthread_join  (client_nodes[index].timer_thread_id, NULL);
 			if (close < 0)
 				fprintf(stderr, "Modbus plugin: Error closing timer thread for modbus client node %%s\n", client_nodes[index].location);
@@ -835,6 +825,7 @@
 		client_nodes[index].init_state = 0;
 	}
 	
+//fprintf(stderr, "Modbus plugin: __cleanup_%%s()  5  close=%%d   res=%%d\n", client_nodes[index].location, close, res);
 	/* kill thread and close connections of each modbus server node */
 	for (index=0; index < NUMBER_OF_SERVER_NODES; index++) {
 		close = 0;
diff -r 696301e869d5 -r 6ea4b7e1a9ed modbus/mb_runtime.h
--- a/modbus/mb_runtime.h	Wed Sep 16 09:42:26 2020 +0200
+++ b/modbus/mb_runtime.h	Thu Sep 17 11:30:22 2020 +0200
@@ -107,7 +107,6 @@
 	    int		prev_error; // error code of the last printed error message (0 when no error) 
 	    pthread_t   thread_id;  // thread handling all communication for this client node
 	    pthread_t	timer_thread_id;  // thread handling periodical timer for this client node
-	    timer_t      timer_id;  // timer used to periodically activate this client node's thread
 	    pthread_mutex_t mutex;  // mutex to be used with the following condition variable
         pthread_cond_t  condv;  // used to signal the client thread when to start new modbus transactions
         int       execute_req;  /* used, in association with condition variable,  
diff -r 696301e869d5 -r 6ea4b7e1a9ed modbus/web_settings.py
--- a/modbus/web_settings.py	Wed Sep 16 09:42:26 2020 +0200
+++ b/modbus/web_settings.py	Thu Sep 17 11:30:22 2020 +0200
@@ -183,7 +183,7 @@
     ("baud"             , _("Baud Rate")             , ctypes.c_int,       MB_Baud         ),
     ("parity"           , _("Parity")                , ctypes.c_int,       MB_Parity       ),
     ("stop_bits"        , _("Stop Bits")             , ctypes.c_int,       MB_StopBits     ),
-    ("slave_id"         , _("Slave ID")              , ctypes.c_ulonglong, annotate.Integer)
+    ("slave_id"         , _("Slave ID")              , ctypes.c_ubyte,     annotate.Integer)
     ]
 
 
@@ -228,7 +228,7 @@
         # This allows us to confirm the saved data contains the correct addr_type
         # when loading from file
         save_info = {}
-        save_info["addr_type"] = ["addr_type"]
+        save_info["addr_type"] = WebNode_entry["addr_type"]
         save_info["node_type"] = WebNode_entry["node_type"]
         save_info["config"   ] = newConfig
         
@@ -262,7 +262,7 @@
     filename = _WebNodeList[WebNode_id]["filename"]
     try:
         #if os.path.isfile(filename):
-        save_info = json.load(open(filename))
+        save_info = json.load(open(os.path.realpath(filename)))
     except Exception:    
         return None
 
diff -r 696301e869d5 -r 6ea4b7e1a9ed plcopen/plcopen.py
--- a/plcopen/plcopen.py	Wed Sep 16 09:42:26 2020 +0200
+++ b/plcopen/plcopen.py	Thu Sep 17 11:30:22 2020 +0200
@@ -331,12 +331,16 @@
 
 
 def SaveProject(project, filepath):
-    project_file = open(filepath, 'w')
-    project_file.write(etree.tostring(
+    content = etree.tostring(
         project,
         pretty_print=True,
         xml_declaration=True,
-        encoding='utf-8'))
+        encoding='utf-8')
+
+    assert len(content) != 0
+        
+    project_file = open(filepath, 'w')
+    project_file.write(content)
     project_file.close()
 
 
diff -r 696301e869d5 -r 6ea4b7e1a9ed runtime/PLCObject.py
--- a/runtime/PLCObject.py	Wed Sep 16 09:42:26 2020 +0200
+++ b/runtime/PLCObject.py	Thu Sep 17 11:30:22 2020 +0200
@@ -440,6 +440,7 @@
 
             if cmd == "Activate":
                 self.PythonRuntimeCall("start")
+                self.PreStartPLC()
                 self.PythonThreadLoop()
                 self.PythonRuntimeCall("stop", reverse_order=True)
             else:  # "Finish"
@@ -471,8 +472,6 @@
             if not self.LoadPLC():
                 self._fail(_("Problem starting PLC : can't load PLC"))
 
-        self.PreStartPLC()
-
         if self.CurrentPLCFilename is not None and self.PLCStatus == PlcStatus.Stopped:
             c_argv = ctypes.c_char_p * len(self.argv)
             res = self._startPLC(len(self.argv), c_argv(*self.argv))
diff -r 696301e869d5 -r 6ea4b7e1a9ed svghmi/gen_index_xhtml.xslt
--- a/svghmi/gen_index_xhtml.xslt	Wed Sep 16 09:42:26 2020 +0200
+++ b/svghmi/gen_index_xhtml.xslt	Thu Sep 17 11:30:22 2020 +0200
@@ -1,9 +1,9 @@
 <?xml version="1.0"?>
-<xsl:stylesheet xmlns:ns="beremiz" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:exsl="http://exslt.org/common" xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:preamble="preamble" xmlns:regexp="http://exslt.org/regular-expressions" xmlns:svg="http://www.w3.org/2000/svg" xmlns:debug="debug" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:definitions="definitions" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" xmlns:cc="http://creativecommons.org/ns#" xmlns:declarations="declarations" xmlns:func="http://exslt.org/functions" xmlns:str="http://exslt.org/strings" xmlns:epilogue="epilogue" extension-element-prefixes="ns func exsl regexp str dyn" version="1.0" exclude-result-prefixes="ns func exsl regexp str dyn debug preamble epilogue declarations definitions">
-  <xsl:output cdata-section-elements="xhtml:script" method="xml"/>
-  <xsl:variable select="/svg:svg" name="svg"/>
-  <xsl:variable select="//svg:*[starts-with(@inkscape:label, 'HMI:')]" name="hmi_elements"/>
-  <xsl:variable select="ns:GetHMITree()" name="hmitree"/>
+<xsl:stylesheet xmlns:ns="beremiz" xmlns:definitions="definitions" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:func="http://exslt.org/functions" xmlns:epilogue="epilogue" xmlns:preamble="preamble" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" xmlns:svg="http://www.w3.org/2000/svg" xmlns:cc="http://creativecommons.org/ns#" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:str="http://exslt.org/strings" xmlns:regexp="http://exslt.org/regular-expressions" xmlns:exsl="http://exslt.org/common" xmlns:declarations="declarations" xmlns:debug="debug" exclude-result-prefixes="ns func exsl regexp str dyn debug preamble epilogue declarations definitions" extension-element-prefixes="ns func exsl regexp str dyn" version="1.0">
+  <xsl:output method="xml" cdata-section-elements="xhtml:script"/>
+  <xsl:variable name="svg" select="/svg:svg"/>
+  <xsl:variable name="hmi_elements" select="//svg:*[starts-with(@inkscape:label, 'HMI:')]"/>
+  <xsl:variable name="hmitree" select="ns:GetHMITree()"/>
   <xsl:variable name="_categories">
     <noindex>
       <xsl:text>HMI_PLC_STATUS</xsl:text>
@@ -12,11 +12,11 @@
       <xsl:text>HMI_CURRENT_PAGE</xsl:text>
     </noindex>
   </xsl:variable>
-  <xsl:variable select="exsl:node-set($_categories)" name="categories"/>
+  <xsl:variable name="categories" select="exsl:node-set($_categories)"/>
   <xsl:variable name="_indexed_hmitree">
     <xsl:apply-templates mode="index" select="$hmitree"/>
   </xsl:variable>
-  <xsl:variable select="exsl:node-set($_indexed_hmitree)" name="indexed_hmitree"/>
+  <xsl:variable name="indexed_hmitree" select="exsl:node-set($_indexed_hmitree)"/>
   <preamble:hmi-tree/>
   <xsl:template match="preamble:hmi-tree">
     <xsl:text>
@@ -63,8 +63,8 @@
 </xsl:text>
   </xsl:template>
   <xsl:template mode="index" match="*">
-    <xsl:param select="0" name="index"/>
-    <xsl:param select="''" name="parentpath"/>
+    <xsl:param name="index" select="0"/>
+    <xsl:param name="parentpath" select="''"/>
     <xsl:variable name="content">
       <xsl:variable name="path">
         <xsl:choose>
@@ -96,7 +96,7 @@
             </xsl:for-each>
           </xsl:copy>
           <xsl:apply-templates mode="index" select="*[1]">
-            <xsl:with-param select="$index + 1" name="index"/>
+            <xsl:with-param name="index" select="$index + 1"/>
             <xsl:with-param name="parentpath">
               <xsl:value-of select="$path"/>
             </xsl:with-param>
@@ -104,7 +104,7 @@
         </xsl:when>
         <xsl:otherwise>
           <xsl:apply-templates mode="index" select="*[1]">
-            <xsl:with-param select="$index" name="index"/>
+            <xsl:with-param name="index" select="$index"/>
             <xsl:with-param name="parentpath">
               <xsl:value-of select="$path"/>
             </xsl:with-param>
@@ -114,16 +114,16 @@
     </xsl:variable>
     <xsl:copy-of select="$content"/>
     <xsl:apply-templates mode="index" select="following-sibling::*[1]">
-      <xsl:with-param select="$index + count(exsl:node-set($content)/*)" name="index"/>
+      <xsl:with-param name="index" select="$index + count(exsl:node-set($content)/*)"/>
       <xsl:with-param name="parentpath">
         <xsl:value-of select="$parentpath"/>
       </xsl:with-param>
     </xsl:apply-templates>
   </xsl:template>
   <xsl:template mode="parselabel" match="*">
-    <xsl:variable select="@inkscape:label" name="label"/>
-    <xsl:variable select="substring-after($label,'HMI:')" name="description"/>
-    <xsl:variable select="substring-before($description,'@')" name="_args"/>
+    <xsl:variable name="label" select="@inkscape:label"/>
+    <xsl:variable name="description" select="substring-after($label,'HMI:')"/>
+    <xsl:variable name="_args" select="substring-before($description,'@')"/>
     <xsl:variable name="args">
       <xsl:choose>
         <xsl:when test="$_args">
@@ -134,7 +134,7 @@
         </xsl:otherwise>
       </xsl:choose>
     </xsl:variable>
-    <xsl:variable select="substring-before($args,':')" name="_type"/>
+    <xsl:variable name="_type" select="substring-before($args,':')"/>
     <xsl:variable name="type">
       <xsl:choose>
         <xsl:when test="$_type">
@@ -160,15 +160,15 @@
             </xsl:attribute>
           </arg>
         </xsl:for-each>
-        <xsl:variable select="substring-after($description,'@')" name="paths"/>
+        <xsl:variable name="paths" select="substring-after($description,'@')"/>
         <xsl:for-each select="str:split($paths, '@')">
           <xsl:if test="string-length(.) &gt; 0">
             <path>
               <xsl:attribute name="value">
                 <xsl:value-of select="."/>
               </xsl:attribute>
-              <xsl:variable select="." name="path"/>
-              <xsl:variable select="$indexed_hmitree/*[@hmipath = $path]" name="item"/>
+              <xsl:variable name="path" select="."/>
+              <xsl:variable name="item" select="$indexed_hmitree/*[@hmipath = $path]"/>
               <xsl:choose>
                 <xsl:when test="count($item) = 1">
                   <xsl:attribute name="index">
@@ -202,7 +202,7 @@
   <xsl:variable name="_parsed_widgets">
     <xsl:apply-templates mode="parselabel" select="$hmi_elements"/>
   </xsl:variable>
-  <xsl:variable select="exsl:node-set($_parsed_widgets)" name="parsed_widgets"/>
+  <xsl:variable name="parsed_widgets" select="exsl:node-set($_parsed_widgets)"/>
   <func:function name="func:widget">
     <xsl:param name="id"/>
     <func:result select="$parsed_widgets/widget[@id = $id]"/>
@@ -215,12 +215,12 @@
   <func:function name="func:same_class_paths">
     <xsl:param name="a"/>
     <xsl:param name="b"/>
-    <xsl:variable select="$indexed_hmitree/*[@hmipath = $a]/@class" name="class_a"/>
-    <xsl:variable select="$indexed_hmitree/*[@hmipath = $b]/@class" name="class_b"/>
+    <xsl:variable name="class_a" select="$indexed_hmitree/*[@hmipath = $a]/@class"/>
+    <xsl:variable name="class_b" select="$indexed_hmitree/*[@hmipath = $b]/@class"/>
     <func:result select="$class_a and $class_b and $class_a = $class_b"/>
   </func:function>
   <xsl:template mode="testtree" match="*">
-    <xsl:param select="''" name="indent"/>
+    <xsl:param name="indent" select="''"/>
     <xsl:value-of select="$indent"/>
     <xsl:text> </xsl:text>
     <xsl:value-of select="local-name()"/>
@@ -266,7 +266,7 @@
     <xsl:text>
 </xsl:text>
   </xsl:template>
-  <xsl:variable select="ns:GetSVGGeometry()" name="geometry"/>
+  <xsl:variable name="geometry" select="ns:GetSVGGeometry()"/>
   <debug:geometry/>
   <xsl:template match="debug:geometry">
     <xsl:text>
@@ -301,8 +301,8 @@
     <xsl:param name="a1"/>
     <xsl:param name="b0"/>
     <xsl:param name="b1"/>
-    <xsl:variable select="$a0 &gt;= $b0" name="d0"/>
-    <xsl:variable select="$a1 &gt;= $b1" name="d1"/>
+    <xsl:variable name="d0" select="$a0 &gt;= $b0"/>
+    <xsl:variable name="d1" select="$a1 &gt;= $b1"/>
     <xsl:choose>
       <xsl:when test="not($d0) and $d1">
         <func:result select="3"/>
@@ -324,10 +324,10 @@
   <func:function name="func:intersect">
     <xsl:param name="a"/>
     <xsl:param name="b"/>
-    <xsl:variable select="func:intersect_1d($a/@x, $a/@x+$a/@w, $b/@x, $b/@x+$b/@w)" name="x_intersect"/>
+    <xsl:variable name="x_intersect" select="func:intersect_1d($a/@x, $a/@x+$a/@w, $b/@x, $b/@x+$b/@w)"/>
     <xsl:choose>
       <xsl:when test="$x_intersect != 0">
-        <xsl:variable select="func:intersect_1d($a/@y, $a/@y+$a/@h, $b/@y, $b/@y+$b/@h)" name="y_intersect"/>
+        <xsl:variable name="y_intersect" select="func:intersect_1d($a/@y, $a/@y+$a/@h, $b/@y, $b/@y+$b/@h)"/>
         <func:result select="$x_intersect * $y_intersect"/>
       </xsl:when>
       <xsl:otherwise>
@@ -337,13 +337,13 @@
   </func:function>
   <func:function name="func:overlapping_geometry">
     <xsl:param name="elt"/>
-    <xsl:variable select="/svg:svg | //svg:g" name="groups"/>
-    <xsl:variable select="$geometry[@Id = $elt/@id]" name="g"/>
-    <xsl:variable select="$geometry[@Id != $elt/@id]" name="candidates"/>
+    <xsl:variable name="groups" select="/svg:svg | //svg:g"/>
+    <xsl:variable name="g" select="$geometry[@Id = $elt/@id]"/>
+    <xsl:variable name="candidates" select="$geometry[@Id != $elt/@id]"/>
     <func:result select="$candidates[(@Id = $groups/@id and (func:intersect($g, .) = 9)) or &#10;                          (not(@Id = $groups/@id) and (func:intersect($g, .) &gt; 0 ))]"/>
   </func:function>
-  <xsl:variable select="$parsed_widgets/widget[@type = 'Page']" name="hmi_pages_descs"/>
-  <xsl:variable select="$hmi_elements[@id = $hmi_pages_descs/@id]" name="hmi_pages"/>
+  <xsl:variable name="hmi_pages_descs" select="$parsed_widgets/widget[@type = 'Page']"/>
+  <xsl:variable name="hmi_pages" select="$hmi_elements[@id = $hmi_pages_descs/@id]"/>
   <xsl:variable name="default_page">
     <xsl:choose>
       <xsl:when test="count($hmi_pages) &gt; 1">
@@ -383,13 +383,13 @@
     <xsl:text>
 </xsl:text>
   </xsl:template>
-  <xsl:variable select="$parsed_widgets/widget[@type = 'Keypad']" name="keypads_descs"/>
-  <xsl:variable select="$hmi_elements[@id = $keypads_descs/@id]" name="keypads"/>
+  <xsl:variable name="keypads_descs" select="$parsed_widgets/widget[@type = 'Keypad']"/>
+  <xsl:variable name="keypads" select="$hmi_elements[@id = $keypads_descs/@id]"/>
   <func:function name="func:refered_elements">
     <xsl:param name="elems"/>
-    <xsl:variable select="$elems/descendant-or-self::svg:*" name="descend"/>
-    <xsl:variable select="$descend[self::svg:use]" name="clones"/>
-    <xsl:variable select="//svg:*[concat('#',@id) = $clones/@xlink:href]" name="originals"/>
+    <xsl:variable name="descend" select="$elems/descendant-or-self::svg:*"/>
+    <xsl:variable name="clones" select="$descend[self::svg:use]"/>
+    <xsl:variable name="originals" select="//svg:*[concat('#',@id) = $clones/@xlink:href]"/>
     <xsl:choose>
       <xsl:when test="$originals">
         <func:result select="$descend | func:refered_elements($originals)"/>
@@ -401,9 +401,9 @@
   </func:function>
   <func:function name="func:all_related_elements">
     <xsl:param name="page"/>
-    <xsl:variable select="func:overlapping_geometry($page)" name="page_overlapping_geometry"/>
-    <xsl:variable select="//svg:*[@id = $page_overlapping_geometry/@Id]" name="page_overlapping_elements"/>
-    <xsl:variable select="func:refered_elements($page | $page_overlapping_elements)" name="page_sub_elements"/>
+    <xsl:variable name="page_overlapping_geometry" select="func:overlapping_geometry($page)"/>
+    <xsl:variable name="page_overlapping_elements" select="//svg:*[@id = $page_overlapping_geometry/@Id]"/>
+    <xsl:variable name="page_sub_elements" select="func:refered_elements($page | $page_overlapping_elements)"/>
     <func:result select="$page_sub_elements"/>
   </func:function>
   <func:function name="func:required_elements">
@@ -417,13 +417,13 @@
       </xsl:otherwise>
     </xsl:choose>
   </func:function>
-  <xsl:variable select="//svg:defs/descendant-or-self::svg:*&#10;       | func:required_elements($hmi_pages | $keypads)/ancestor-or-self::svg:*" name="required_elements"/>
-  <xsl:variable select="//svg:*[not(@id = $required_elements/@id)]" name="discardable_elements"/>
+  <xsl:variable name="required_elements" select="//svg:defs/descendant-or-self::svg:*&#10;       | func:required_elements($hmi_pages | $keypads)/ancestor-or-self::svg:*"/>
+  <xsl:variable name="discardable_elements" select="//svg:*[not(@id = $required_elements/@id)]"/>
   <func:function name="func:sumarized_elements">
     <xsl:param name="elements"/>
-    <xsl:variable select="$elements[not(ancestor::*/@id = $elements/@id)]" name="short_list"/>
-    <xsl:variable select="$short_list/parent::svg:*[&#10;        not(descendant::*[&#10;            not(self::svg:g) and&#10;            not(@id = $discardable_elements/@id) and&#10;            not(@id = $short_list/descendant-or-self::*[not(self::svg:g)]/@id)&#10;        ])]" name="filled_groups"/>
-    <xsl:variable select="$filled_groups[not(ancestor::*/@id = $filled_groups/@id)]" name="groups_to_add"/>
+    <xsl:variable name="short_list" select="$elements[not(ancestor::*/@id = $elements/@id)]"/>
+    <xsl:variable name="filled_groups" select="$short_list/parent::svg:*[&#10;        not(descendant::*[&#10;            not(self::svg:g) and&#10;            not(@id = $discardable_elements/@id) and&#10;            not(@id = $short_list/descendant-or-self::*[not(self::svg:g)]/@id)&#10;        ])]"/>
+    <xsl:variable name="groups_to_add" select="$filled_groups[not(ancestor::*/@id = $filled_groups/@id)]"/>
     <func:result select="$groups_to_add | $short_list[not(ancestor::svg:g/@id = $filled_groups/@id)]"/>
   </func:function>
   <func:function name="func:detachable_elements">
@@ -437,8 +437,8 @@
       </xsl:otherwise>
     </xsl:choose>
   </func:function>
-  <xsl:variable select="func:detachable_elements($hmi_pages | $keypads)" name="_detachable_elements"/>
-  <xsl:variable select="$_detachable_elements[not(ancestor::*/@id = $_detachable_elements/@id)]" name="detachable_elements"/>
+  <xsl:variable name="_detachable_elements" select="func:detachable_elements($hmi_pages | $keypads)"/>
+  <xsl:variable name="detachable_elements" select="$_detachable_elements[not(ancestor::*/@id = $_detachable_elements/@id)]"/>
   <declarations:detachable-elements/>
   <xsl:template match="declarations:detachable-elements">
     <xsl:text>
@@ -472,18 +472,18 @@
     <xsl:text>
 </xsl:text>
   </xsl:template>
-  <xsl:variable select="$parsed_widgets/widget[@type = 'ForEach']/@id" name="forEach_widgets_ids"/>
-  <xsl:variable select="$hmi_elements[@id = $forEach_widgets_ids]" name="forEach_widgets"/>
-  <xsl:variable select="func:refered_elements($forEach_widgets)[not(@id = $forEach_widgets_ids)]/@id" name="in_forEach_widget_ids"/>
+  <xsl:variable name="forEach_widgets_ids" select="$parsed_widgets/widget[@type = 'ForEach']/@id"/>
+  <xsl:variable name="forEach_widgets" select="$hmi_elements[@id = $forEach_widgets_ids]"/>
+  <xsl:variable name="in_forEach_widget_ids" select="func:refered_elements($forEach_widgets)[not(@id = $forEach_widgets_ids)]/@id"/>
   <xsl:template mode="page_desc" match="svg:*">
-    <xsl:variable select="func:widget(@id)" name="desc"/>
-    <xsl:variable select="." name="page"/>
-    <xsl:variable select="$geometry[@Id = $page/@id]" name="p"/>
-    <xsl:variable select="func:all_related_elements($page)" name="page_all_elements"/>
-    <xsl:variable select="$hmi_elements[@id = $page_all_elements/@id and @id != $page/@id]" name="all_page_widgets"/>
-    <xsl:variable select="$all_page_widgets[not(@id=$in_forEach_widget_ids)]" name="page_managed_widgets"/>
-    <xsl:variable select="$page_managed_widgets[func:is_descendant_path(func:widget(@id)/path/@value, $desc/path/@value)]" name="page_relative_widgets"/>
-    <xsl:variable select="func:sumarized_elements($page_all_elements)/&#10;           ancestor-or-self::*[@id = $detachable_elements/@id]" name="required_detachables"/>
+    <xsl:variable name="desc" select="func:widget(@id)"/>
+    <xsl:variable name="page" select="."/>
+    <xsl:variable name="p" select="$geometry[@Id = $page/@id]"/>
+    <xsl:variable name="page_all_elements" select="func:all_related_elements($page)"/>
+    <xsl:variable name="all_page_widgets" select="$hmi_elements[@id = $page_all_elements/@id and @id != $page/@id]"/>
+    <xsl:variable name="page_managed_widgets" select="$all_page_widgets[not(@id=$in_forEach_widget_ids)]"/>
+    <xsl:variable name="page_relative_widgets" select="$page_managed_widgets[func:is_descendant_path(func:widget(@id)/path/@value, $desc/path/@value)]"/>
+    <xsl:variable name="required_detachables" select="func:sumarized_elements($page_all_elements)/&#10;           ancestor-or-self::*[@id = $detachable_elements/@id]"/>
     <xsl:text>  "</xsl:text>
     <xsl:value-of select="$desc/arg[1]/@value"/>
     <xsl:text>": {
@@ -540,10 +540,10 @@
     <xsl:text>    jumps: [
 </xsl:text>
     <xsl:for-each select="$parsed_widgets/widget[@id = $all_page_widgets/@id and @type='Jump']">
-      <xsl:variable select="@id" name="_id"/>
+      <xsl:variable name="_id" select="@id"/>
       <xsl:variable name="opts">
         <xsl:call-template name="jump_widget_activity">
-          <xsl:with-param select="$hmi_elements[@id=$_id]" name="hmi_element"/>
+          <xsl:with-param name="hmi_element" select="$hmi_elements[@id=$_id]"/>
         </xsl:call-template>
       </xsl:variable>
       <xsl:if test="string-length($opts)&gt;0">
@@ -576,7 +576,7 @@
     <xsl:text>    }
 </xsl:text>
     <xsl:apply-templates mode="per_page_widget_template" select="$parsed_widgets/widget[@id = $all_page_widgets/@id]">
-      <xsl:with-param select="$desc" name="page_desc"/>
+      <xsl:with-param name="page_desc" select="$desc"/>
     </xsl:apply-templates>
     <xsl:text>  }</xsl:text>
     <xsl:if test="position()!=last()">
@@ -637,7 +637,10 @@
     <xsl:text>
 </xsl:text>
   </xsl:template>
-  <xsl:template mode="inline_svg" match="@* | node()">
+  <xsl:template xmlns="http://www.w3.org/2000/svg" mode="inline_svg" match="@*">
+    <xsl:copy/>
+  </xsl:template>
+  <xsl:template mode="inline_svg" match="node()">
     <xsl:if test="not(@id = $discardable_elements/@id)">
       <xsl:copy>
         <xsl:apply-templates mode="inline_svg" select="@* | node()"/>
@@ -670,23 +673,26 @@
       <xsl:text>All units must be set to "px" in Inkscape's document properties</xsl:text>
     </xsl:message>
   </xsl:template>
-  <xsl:variable select="$parsed_widgets/widget[@type = 'List']" name="hmi_lists_descs"/>
-  <xsl:variable select="$hmi_elements[@id = $hmi_lists_descs/@id]" name="hmi_lists"/>
-  <xsl:variable select="$hmi_lists/descendant-or-self::svg:*" name="targets_not_to_unlink"/>
-  <xsl:variable select="$hmi_elements[not(@id = $hmi_pages/@id)]/descendant-or-self::svg:use" name="to_unlink"/>
+  <xsl:variable name="hmi_lists_descs" select="$parsed_widgets/widget[@type = 'List']"/>
+  <xsl:variable name="hmi_lists" select="$hmi_elements[@id = $hmi_lists_descs/@id]"/>
+  <xsl:variable name="targets_not_to_unlink" select="$hmi_lists/descendant-or-self::svg:*"/>
+  <xsl:variable name="to_unlink" select="$hmi_elements[not(@id = $hmi_pages/@id)]/descendant-or-self::svg:use"/>
+  <func:function name="func:is_unlinkable">
+    <xsl:param name="targetid"/>
+    <xsl:param name="eltid"/>
+    <func:result select="$eltid = $to_unlink/@id and not($targetid = $targets_not_to_unlink/@id)"/>
+  </func:function>
   <xsl:template xmlns="http://www.w3.org/2000/svg" mode="inline_svg" match="svg:use">
-    <xsl:param name="seed"/>
-    <xsl:variable select="substring-after(@xlink:href,'#')" name="targetid"/>
+    <xsl:variable name="targetid" select="substring-after(@xlink:href,'#')"/>
     <xsl:choose>
-      <xsl:when test="@id = $to_unlink/@id and not($targetid = $targets_not_to_unlink/@id)">
+      <xsl:when test="func:is_unlinkable($targetid, @id)">
         <xsl:call-template name="unlink_clone">
-          <xsl:with-param select="$targetid" name="targetid"/>
-          <xsl:with-param select="$seed" name="seed"/>
+          <xsl:with-param name="targetid" select="$targetid"/>
         </xsl:call-template>
       </xsl:when>
       <xsl:otherwise>
         <xsl:copy>
-          <xsl:apply-templates mode="inline_svg" select="@* | node()"/>
+          <xsl:apply-templates mode="inline_svg" select="@*"/>
         </xsl:copy>
       </xsl:otherwise>
     </xsl:choose>
@@ -711,7 +717,7 @@
       <xsl:text>id</xsl:text>
     </name>
   </xsl:variable>
-  <xsl:variable select="exsl:node-set($_excluded_use_attrs)" name="excluded_use_attrs"/>
+  <xsl:variable name="excluded_use_attrs" select="exsl:node-set($_excluded_use_attrs)"/>
   <xsl:variable name="_merge_use_attrs">
     <name>
       <xsl:text>transform</xsl:text>
@@ -720,16 +726,30 @@
       <xsl:text>style</xsl:text>
     </name>
   </xsl:variable>
-  <xsl:variable select="exsl:node-set($_merge_use_attrs)" name="merge_use_attrs"/>
+  <xsl:variable name="merge_use_attrs" select="exsl:node-set($_merge_use_attrs)"/>
   <xsl:template xmlns="http://www.w3.org/2000/svg" name="unlink_clone">
     <xsl:param name="targetid"/>
-    <xsl:param name="seed"/>
-    <xsl:variable select="//svg:*[@id = $targetid]" name="target"/>
-    <xsl:variable select="concat($seed, @id)" name="seeded_id"/>
+    <xsl:param name="seed" select="''"/>
+    <xsl:variable name="target" select="//svg:*[@id = $targetid]"/>
+    <xsl:variable name="seeded_id">
+      <xsl:choose>
+        <xsl:when test="string-length($seed) &gt; 0">
+          <xsl:value-of select="$seed"/>
+          <xsl:text>_</xsl:text>
+          <xsl:value-of select="@id"/>
+        </xsl:when>
+        <xsl:otherwise>
+          <xsl:value-of select="@id"/>
+        </xsl:otherwise>
+      </xsl:choose>
+    </xsl:variable>
     <g>
       <xsl:attribute name="id">
         <xsl:value-of select="$seeded_id"/>
       </xsl:attribute>
+      <xsl:attribute name="original">
+        <xsl:value-of select="@id"/>
+      </xsl:attribute>
       <xsl:choose>
         <xsl:when test="$target[self::svg:g]">
           <xsl:for-each select="@*[not(local-name() = $excluded_use_attrs/name | $merge_use_attrs)]">
@@ -756,7 +776,7 @@
             </xsl:attribute>
           </xsl:if>
           <xsl:apply-templates mode="unlink_clone" select="$target/*">
-            <xsl:with-param select="concat($seed, @id)" name="seed"/>
+            <xsl:with-param name="seed" select="$seeded_id"/>
           </xsl:apply-templates>
         </xsl:when>
         <xsl:otherwise>
@@ -766,7 +786,7 @@
             </xsl:attribute>
           </xsl:for-each>
           <xsl:apply-templates mode="unlink_clone" select="$target">
-            <xsl:with-param select="concat($seed, @id)" name="seed"/>
+            <xsl:with-param name="seed" select="$seeded_id"/>
           </xsl:apply-templates>
         </xsl:otherwise>
       </xsl:choose>
@@ -779,15 +799,31 @@
       <xsl:text>_</xsl:text>
       <xsl:value-of select="."/>
     </xsl:attribute>
+    <xsl:attribute name="original">
+      <xsl:value-of select="."/>
+    </xsl:attribute>
   </xsl:template>
   <xsl:template xmlns="http://www.w3.org/2000/svg" mode="unlink_clone" match="@*">
     <xsl:copy/>
   </xsl:template>
   <xsl:template xmlns="http://www.w3.org/2000/svg" mode="unlink_clone" match="svg:use">
     <xsl:param name="seed"/>
-    <xsl:apply-templates mode="inline_svg" select=".">
-      <xsl:with-param select="concat($seed, '_')" name="seed"/>
-    </xsl:apply-templates>
+    <xsl:variable name="targetid" select="substring-after(@xlink:href,'#')"/>
+    <xsl:choose>
+      <xsl:when test="func:is_unlinkable($targetid, @id)">
+        <xsl:call-template name="unlink_clone">
+          <xsl:with-param name="targetid" select="$targetid"/>
+          <xsl:with-param name="seed" select="$seed"/>
+        </xsl:call-template>
+      </xsl:when>
+      <xsl:otherwise>
+        <xsl:copy>
+          <xsl:apply-templates mode="unlink_clone" select="@*">
+            <xsl:with-param name="seed" select="$seed"/>
+          </xsl:apply-templates>
+        </xsl:copy>
+      </xsl:otherwise>
+    </xsl:choose>
   </xsl:template>
   <xsl:template xmlns="http://www.w3.org/2000/svg" mode="unlink_clone" match="svg:*">
     <xsl:param name="seed"/>
@@ -802,7 +838,7 @@
       <xsl:otherwise>
         <xsl:copy>
           <xsl:apply-templates mode="unlink_clone" select="@* | node()">
-            <xsl:with-param select="$seed" name="seed"/>
+            <xsl:with-param name="seed" select="$seed"/>
           </xsl:apply-templates>
         </xsl:copy>
       </xsl:otherwise>
@@ -811,7 +847,7 @@
   <xsl:variable name="result_svg">
     <xsl:apply-templates mode="inline_svg" select="/"/>
   </xsl:variable>
-  <xsl:variable select="exsl:node-set($result_svg)" name="result_svg_ns"/>
+  <xsl:variable name="result_svg_ns" select="exsl:node-set($result_svg)"/>
   <preamble:inline-svg/>
   <xsl:template match="preamble:inline-svg">
     <xsl:text>
@@ -861,8 +897,8 @@
 </xsl:text>
   </xsl:template>
   <xsl:template mode="hmi_widgets" match="svg:*">
-    <xsl:variable select="func:widget(@id)" name="widget"/>
-    <xsl:variable select="@id" name="eltid"/>
+    <xsl:variable name="widget" select="func:widget(@id)"/>
+    <xsl:variable name="eltid" select="@id"/>
     <xsl:variable name="args">
       <xsl:for-each select="$widget/arg">
         <xsl:text>"</xsl:text>
@@ -879,7 +915,7 @@
           <xsl:when test="not(@index)">
             <xsl:choose>
               <xsl:when test="not(@type)">
-                <xsl:message terminate="yes">
+                <xsl:message terminate="no">
                   <xsl:text>Widget </xsl:text>
                   <xsl:value-of select="$widget/@type"/>
                   <xsl:text> id="</xsl:text>
@@ -888,6 +924,10 @@
                   <xsl:value-of select="@value"/>
                   <xsl:text>" in HMI tree</xsl:text>
                 </xsl:message>
+                <xsl:text>undefined</xsl:text>
+                <xsl:if test="position()!=last()">
+                  <xsl:text>,</xsl:text>
+                </xsl:if>
               </xsl:when>
               <xsl:when test="@type = 'PAGE_LOCAL'">
                 <xsl:text>"</xsl:text>
@@ -929,7 +969,7 @@
     <xsl:text>],{
 </xsl:text>
     <xsl:apply-templates mode="widget_defs" select="$widget">
-      <xsl:with-param select="." name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="."/>
     </xsl:apply-templates>
     <xsl:text>  })</xsl:text>
     <xsl:if test="position()!=last()">
@@ -942,7 +982,7 @@
     <xsl:param name="elts_with_type"/>
     <xsl:choose>
       <xsl:when test="count($elts_with_type) &gt; 1">
-        <xsl:variable select="func:unique_types($elts_with_type[position()!=last()])" name="prior_results"/>
+        <xsl:variable name="prior_results" select="func:unique_types($elts_with_type[position()!=last()])"/>
         <xsl:choose>
           <xsl:when test="$elts_with_type[last()][@type = $prior_results/@type]">
             <func:result select="$prior_results"/>
@@ -1143,6 +1183,8 @@
 </xsl:text>
     <xsl:text>                let index = this.get_variable_index(i);
 </xsl:text>
+    <xsl:text>                if(index == undefined) continue;
+</xsl:text>
     <xsl:text>                subscribers(index).add(this);
 </xsl:text>
     <xsl:text>            }
@@ -1161,6 +1203,8 @@
 </xsl:text>
     <xsl:text>            let realindex = this.get_variable_index(index);
 </xsl:text>
+    <xsl:text>            if(realindex == undefined) continue;
+</xsl:text>
     <xsl:text>            let cached_val = cache[realindex];
 </xsl:text>
     <xsl:text>            if(cached_val != undefined)
@@ -1195,9 +1239,13 @@
 </xsl:text>
     <xsl:text>    }
 </xsl:text>
-    <xsl:text>    change_hmi_value(index,opstr) {
-</xsl:text>
-    <xsl:text>        return change_hmi_value(this.get_variable_index(index), opstr);
+    <xsl:text>    change_hmi_value(index, opstr) {
+</xsl:text>
+    <xsl:text>        let realindex = this.get_variable_index(index);
+</xsl:text>
+    <xsl:text>        if(realindex == undefined) return undefined;
+</xsl:text>
+    <xsl:text>        return change_hmi_value(realindex, opstr);
 </xsl:text>
     <xsl:text>    }
 </xsl:text>
@@ -1205,7 +1253,11 @@
 </xsl:text>
     <xsl:text>    apply_hmi_value(index, new_val) {
 </xsl:text>
-    <xsl:text>        return apply_hmi_value(this.get_variable_index(0), new_val);
+    <xsl:text>        let realindex = this.get_variable_index(index);
+</xsl:text>
+    <xsl:text>        if(realindex == undefined) return undefined;
+</xsl:text>
+    <xsl:text>        return apply_hmi_value(realindex, new_val);
 </xsl:text>
     <xsl:text>    }
 </xsl:text>
@@ -1219,6 +1271,8 @@
 </xsl:text>
     <xsl:text>            let refindex = this.get_variable_index(i);
 </xsl:text>
+    <xsl:text>            if(refindex == undefined) continue;
+</xsl:text>
     <xsl:text>
 </xsl:text>
     <xsl:text>            if(index == refindex) {
@@ -1298,7 +1352,7 @@
 </xsl:text>
     <xsl:text>
 </xsl:text>
-    <xsl:variable select="func:unique_types($parsed_widgets/widget)" name="used_widget_types"/>
+    <xsl:variable name="used_widget_types" select="func:unique_types($parsed_widgets/widget)"/>
     <xsl:apply-templates mode="widget_class" select="$used_widget_types"/>
     <xsl:text>
 </xsl:text>
@@ -1315,8 +1369,8 @@
     <xsl:text>}
 </xsl:text>
   </xsl:template>
-  <xsl:variable select="str:split('Page Lang VarInit')" name="excluded_types"/>
-  <xsl:variable select="$parsed_widgets/widget[not(@type = $excluded_types)]/@id" name="included_ids"/>
+  <xsl:variable name="excluded_types" select="str:split('Page Lang VarInit')"/>
+  <xsl:variable name="included_ids" select="$parsed_widgets/widget[not(@type = $excluded_types)]/@id"/>
   <declarations:hmi-elements/>
   <xsl:template match="declarations:hmi-elements">
     <xsl:text>
@@ -1336,14 +1390,14 @@
 </xsl:text>
   </xsl:template>
   <xsl:template name="defs_by_labels">
-    <xsl:param select="''" name="labels"/>
-    <xsl:param select="'yes'" name="mandatory"/>
-    <xsl:param select="/.." name="subelements"/>
+    <xsl:param name="labels" select="''"/>
+    <xsl:param name="mandatory" select="'yes'"/>
+    <xsl:param name="subelements" select="/.."/>
     <xsl:param name="hmi_element"/>
-    <xsl:variable select="@type" name="widget_type"/>
+    <xsl:variable name="widget_type" select="@type"/>
     <xsl:for-each select="str:split($labels)">
-      <xsl:variable select="." name="name"/>
-      <xsl:variable select="$result_svg_ns//*[@id = $hmi_element/@id]//*[@inkscape:label=$name][1]" name="elt"/>
+      <xsl:variable name="name" select="."/>
+      <xsl:variable name="elt" select="$result_svg_ns//*[@id = $hmi_element/@id]//*[@inkscape:label=$name][1]"/>
       <xsl:choose>
         <xsl:when test="not($elt/@id)">
           <xsl:if test="$mandatory='yes'">
@@ -1368,8 +1422,8 @@
             <xsl:text>_sub: {
 </xsl:text>
             <xsl:for-each select="str:split($subelements)">
-              <xsl:variable select="." name="subname"/>
-              <xsl:variable select="$elt/*[@inkscape:label=$subname][1]" name="subelt"/>
+              <xsl:variable name="subname" select="."/>
+              <xsl:variable name="subelt" select="$elt/*[@inkscape:label=$subname][1]"/>
               <xsl:choose>
                 <xsl:when test="not($subelt/@id)">
                   <xsl:if test="$mandatory='yes'">
@@ -1454,12 +1508,26 @@
 </xsl:text>
     <xsl:text>    state = 0;
 </xsl:text>
+    <xsl:text>    plc_lock = false;
+</xsl:text>
     <xsl:text>    active_style = undefined;
 </xsl:text>
     <xsl:text>    inactive_style = undefined;
 </xsl:text>
     <xsl:text>
 </xsl:text>
+    <xsl:text>    dispatch(value) {
+</xsl:text>
+    <xsl:text>        if(value){
+</xsl:text>
+    <xsl:text>            this.button_release();
+</xsl:text>
+    <xsl:text>        }
+</xsl:text>
+    <xsl:text>    }
+</xsl:text>
+    <xsl:text>
+</xsl:text>
     <xsl:text>     on_mouse_down(evt) {
 </xsl:text>
     <xsl:text>         if (this.active_style &amp;&amp; this.inactive_style) {
@@ -1472,21 +1540,41 @@
 </xsl:text>
     <xsl:text>         this.apply_hmi_value(0, 1);
 </xsl:text>
+    <xsl:text>         this.plc_lock = false;
+</xsl:text>
     <xsl:text>     }
 </xsl:text>
     <xsl:text>
 </xsl:text>
     <xsl:text>     on_mouse_up(evt) {
 </xsl:text>
-    <xsl:text>         if (this.active_style &amp;&amp; this.inactive_style) {
-</xsl:text>
-    <xsl:text>             this.active_elt.setAttribute("style", "display:none");
-</xsl:text>
-    <xsl:text>             this.inactive_elt.setAttribute("style", this.inactive_style);
-</xsl:text>
-    <xsl:text>         }
-</xsl:text>
-    <xsl:text>         this.apply_hmi_value(0, 0);
+    <xsl:text>         this.button_release();
+</xsl:text>
+    <xsl:text>     }
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>     button_release(){
+</xsl:text>
+    <xsl:text>        if(!this.plc_lock){
+</xsl:text>
+    <xsl:text>            this.plc_lock = true;
+</xsl:text>
+    <xsl:text>        }
+</xsl:text>
+    <xsl:text>        else{
+</xsl:text>
+    <xsl:text>            if (this.active_style &amp;&amp; this.inactive_style) {
+</xsl:text>
+    <xsl:text>                 this.active_elt.setAttribute("style", "display:none");
+</xsl:text>
+    <xsl:text>                 this.inactive_elt.setAttribute("style", this.inactive_style);
+</xsl:text>
+    <xsl:text>             }
+</xsl:text>
+    <xsl:text>             this.apply_hmi_value(0, 0);
+</xsl:text>
+    <xsl:text>        }
 </xsl:text>
     <xsl:text>     }
 </xsl:text>
@@ -1522,11 +1610,11 @@
   <xsl:template mode="widget_defs" match="widget[@type='Button']">
     <xsl:param name="hmi_element"/>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>active inactive</xsl:text>
       </xsl:with-param>
-      <xsl:with-param select="'no'" name="mandatory"/>
+      <xsl:with-param name="mandatory" select="'no'"/>
     </xsl:call-template>
     <xsl:text>
 </xsl:text>
@@ -1624,17 +1712,17 @@
   <xsl:template mode="widget_defs" match="widget[@type='CircularBar']">
     <xsl:param name="hmi_element"/>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>path</xsl:text>
       </xsl:with-param>
     </xsl:call-template>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>value min max</xsl:text>
       </xsl:with-param>
-      <xsl:with-param select="'no'" name="mandatory"/>
+      <xsl:with-param name="mandatory" select="'no'"/>
     </xsl:call-template>
     <xsl:text>
 </xsl:text>
@@ -2028,17 +2116,17 @@
   <xsl:template mode="widget_defs" match="widget[@type='CircularSlider']">
     <xsl:param name="hmi_element"/>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>handle range</xsl:text>
       </xsl:with-param>
     </xsl:call-template>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>value min max</xsl:text>
       </xsl:with-param>
-      <xsl:with-param select="'no'" name="mandatory"/>
+      <xsl:with-param name="mandatory" select="'no'"/>
     </xsl:call-template>
     <xsl:text>
 </xsl:text>
@@ -2052,8 +2140,6 @@
 </xsl:text>
     <xsl:text>        this.fields[index] = value;    
 </xsl:text>
-    <xsl:text>        console.log(value, index);
-</xsl:text>
     <xsl:text>        this.element.textContent = this.args.length == 1 ? vsprintf(this.args[0],this.fields) : this.fields.join(' ');
 </xsl:text>
     <xsl:text>    }
@@ -2570,7 +2656,7 @@
   <xsl:template mode="widget_defs" match="widget[@type='DropDown']">
     <xsl:param name="hmi_element"/>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>text box button</xsl:text>
       </xsl:with-param>
@@ -2891,8 +2977,6 @@
 </xsl:text>
     <xsl:text>        }
 </xsl:text>
-    <xsl:text>        console.log(this.menu_offset);
-</xsl:text>
     <xsl:text>        this.set_partial_text();
 </xsl:text>
     <xsl:text>    },
@@ -3096,13 +3180,13 @@
         <xsl:text> must have one argument given : a class name.</xsl:text>
       </xsl:message>
     </xsl:if>
-    <xsl:variable select="arg[1]/@value" name="class"/>
-    <xsl:variable select="path/@value" name="base_path"/>
-    <xsl:variable select="$indexed_hmitree/*[@hmipath = $base_path]" name="hmi_index_base"/>
-    <xsl:variable select="$hmitree/descendant-or-self::*[@path = $hmi_index_base/@path]" name="hmi_tree_base"/>
-    <xsl:variable select="$hmi_tree_base/*[@class = $class]" name="hmi_tree_items"/>
-    <xsl:variable select="$indexed_hmitree/*[@path = $hmi_tree_items/@path]" name="hmi_index_items"/>
-    <xsl:variable select="$hmi_index_items/@hmipath" name="items_paths"/>
+    <xsl:variable name="class" select="arg[1]/@value"/>
+    <xsl:variable name="base_path" select="path/@value"/>
+    <xsl:variable name="hmi_index_base" select="$indexed_hmitree/*[@hmipath = $base_path]"/>
+    <xsl:variable name="hmi_tree_base" select="$hmitree/descendant-or-self::*[@path = $hmi_index_base/@path]"/>
+    <xsl:variable name="hmi_tree_items" select="$hmi_tree_base/*[@class = $class]"/>
+    <xsl:variable name="hmi_index_items" select="$indexed_hmitree/*[@path = $hmi_tree_items/@path]"/>
+    <xsl:variable name="items_paths" select="$hmi_index_items/@hmipath"/>
     <xsl:text>    index_pool: [
 </xsl:text>
     <xsl:for-each select="$hmi_index_items">
@@ -3118,11 +3202,11 @@
 </xsl:text>
     <xsl:text>    init: function() {
 </xsl:text>
-    <xsl:variable select="concat($class,':')" name="prefix"/>
-    <xsl:variable select="concat('^',$prefix,'[+\-][0-9]+')" name="buttons_regex"/>
-    <xsl:variable select="$hmi_element/*[regexp:test(@inkscape:label, $buttons_regex)]" name="buttons"/>
+    <xsl:variable name="prefix" select="concat($class,':')"/>
+    <xsl:variable name="buttons_regex" select="concat('^',$prefix,'[+\-][0-9]+')"/>
+    <xsl:variable name="buttons" select="$hmi_element/*[regexp:test(@inkscape:label, $buttons_regex)]"/>
     <xsl:for-each select="$buttons">
-      <xsl:variable select="substring-after(@inkscape:label, $prefix)" name="op"/>
+      <xsl:variable name="op" select="substring-after(@inkscape:label, $prefix)"/>
       <xsl:text>        id("</xsl:text>
       <xsl:value-of select="@id"/>
       <xsl:text>").setAttribute("onclick", "hmi_widgets['</xsl:text>
@@ -3136,13 +3220,13 @@
 </xsl:text>
     <xsl:text>        this.items = [
 </xsl:text>
-    <xsl:variable select="concat('^',$prefix,'[0-9]+')" name="items_regex"/>
-    <xsl:variable select="$hmi_element//*[regexp:test(@inkscape:label, $items_regex)]" name="unordered_items"/>
+    <xsl:variable name="items_regex" select="concat('^',$prefix,'[0-9]+')"/>
+    <xsl:variable name="unordered_items" select="$hmi_element//*[regexp:test(@inkscape:label, $items_regex)]"/>
     <xsl:for-each select="$unordered_items">
-      <xsl:variable select="concat($prefix, string(position()))" name="elt_label"/>
-      <xsl:variable select="$unordered_items[@inkscape:label = $elt_label]" name="elt"/>
-      <xsl:variable select="position()" name="pos"/>
-      <xsl:variable select="$items_paths[$pos]" name="item_path"/>
+      <xsl:variable name="elt_label" select="concat($prefix, string(position()))"/>
+      <xsl:variable name="elt" select="$unordered_items[@inkscape:label = $elt_label]"/>
+      <xsl:variable name="pos" select="position()"/>
+      <xsl:variable name="item_path" select="$items_paths[$pos]"/>
       <xsl:text>          [ /* item="</xsl:text>
       <xsl:value-of select="$elt_label"/>
       <xsl:text>" path="</xsl:text>
@@ -3333,22 +3417,22 @@
   <xsl:template mode="widget_defs" match="widget[@type='Input']">
     <xsl:param name="hmi_element"/>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>key_pos</xsl:text>
       </xsl:with-param>
-      <xsl:with-param select="'no'" name="mandatory"/>
+      <xsl:with-param name="mandatory" select="'no'"/>
     </xsl:call-template>
     <xsl:variable name="value_elt">
       <xsl:call-template name="defs_by_labels">
-        <xsl:with-param select="$hmi_element" name="hmi_element"/>
+        <xsl:with-param name="hmi_element" select="$hmi_element"/>
         <xsl:with-param name="labels">
           <xsl:text>value</xsl:text>
         </xsl:with-param>
-        <xsl:with-param select="'no'" name="mandatory"/>
+        <xsl:with-param name="mandatory" select="'no'"/>
       </xsl:call-template>
     </xsl:variable>
-    <xsl:variable select="string-length($value_elt)&gt;0" name="have_value"/>
+    <xsl:variable name="have_value" select="string-length($value_elt)&gt;0"/>
     <xsl:value-of select="$value_elt"/>
     <xsl:if test="$have_value">
       <xsl:text>    frequency: 5,
@@ -3366,7 +3450,7 @@
     </xsl:if>
     <xsl:text>    },
 </xsl:text>
-    <xsl:variable select="$hmi_element/*[@inkscape:label='edit'][1]/@id" name="edit_elt_id"/>
+    <xsl:variable name="edit_elt_id" select="$hmi_element/*[@inkscape:label='edit'][1]/@id"/>
     <xsl:text>    init: function() {
 </xsl:text>
     <xsl:if test="$edit_elt_id">
@@ -3403,7 +3487,7 @@
     <xsl:value-of select="path/@value"/>
     <xsl:text>", "</xsl:text>
     <xsl:value-of select="path/@type"/>
-    <xsl:text>", this, this.last_val,size);
+    <xsl:text>", this, this.last_val, size);
 </xsl:text>
     <xsl:text>    },
 </xsl:text>
@@ -3417,15 +3501,19 @@
   <xsl:template mode="widget_class" match="widget[@type='JsonTable']">
     <xsl:text>class JsonTableWidget extends Widget{
 </xsl:text>
-    <xsl:text>    do_http_request() {
+    <xsl:text>    cache = [];
+</xsl:text>
+    <xsl:text>    do_http_request(...opt) {
 </xsl:text>
     <xsl:text>        const query = {
 </xsl:text>
-    <xsl:text>             offset: '42',
-</xsl:text>
-    <xsl:text>             filter: '*powerloss*',
-</xsl:text>
-    <xsl:text>             args: this.args
+    <xsl:text>            args: this.args,
+</xsl:text>
+    <xsl:text>            vars: this.cache,
+</xsl:text>
+    <xsl:text>            visible: this.visible,
+</xsl:text>
+    <xsl:text>            options: opt
 </xsl:text>
     <xsl:text>        };
 </xsl:text>
@@ -3439,7 +3527,7 @@
 </xsl:text>
     <xsl:text>             headers: {'Content-Type': 'application/json'}
 </xsl:text>
-    <xsl:text>        }
+    <xsl:text>        };
 </xsl:text>
     <xsl:text>
 </xsl:text>
@@ -3447,27 +3535,23 @@
 </xsl:text>
     <xsl:text>            .then(res =&gt; res.json())
 </xsl:text>
-    <xsl:text>            .then(this.spread_json_data);
+    <xsl:text>            .then(this.spread_json_data.bind(this));
 </xsl:text>
     <xsl:text>
 </xsl:text>
     <xsl:text>    }
 </xsl:text>
-    <xsl:text>    dispatch(value) {
+    <xsl:text>    dispatch(value, oldval, index) {
+</xsl:text>
+    <xsl:text>        this.cache[index] = value;
 </xsl:text>
     <xsl:text>        this.do_http_request();
 </xsl:text>
     <xsl:text>    }
 </xsl:text>
-    <xsl:text>    on_click(evt) {
-</xsl:text>
-    <xsl:text>        this.do_http_request();
-</xsl:text>
-    <xsl:text>    }
-</xsl:text>
-    <xsl:text>    init() {
-</xsl:text>
-    <xsl:text>        this.element.setAttribute("onclick", "hmi_widgets['"+this.element_id+"'].on_click(evt)");
+    <xsl:text>    on_click(evt, ...options) {
+</xsl:text>
+    <xsl:text>        this.do_http_request(...options);
 </xsl:text>
     <xsl:text>    }
 </xsl:text>
@@ -3481,13 +3565,83 @@
       <xsl:text>.</xsl:text>
     </xsl:message>
   </xsl:template>
-  <xsl:variable select="$parsed_widgets/widget[@type = 'TextStyleList']" name="hmi_textstylelists_descs"/>
-  <xsl:variable select="$hmi_elements[@id = $hmi_textstylelists_descs/@id]" name="hmi_textstylelists"/>
+  <xsl:variable name="hmi_textstylelists_descs" select="$parsed_widgets/widget[@type = 'TextStyleList']"/>
+  <xsl:variable name="hmi_textstylelists" select="$hmi_elements[@id = $hmi_textstylelists_descs/@id]"/>
+  <xsl:variable name="textstylelist_related">
+    <xsl:for-each select="$hmi_textstylelists">
+      <list>
+        <xsl:attribute name="listid">
+          <xsl:value-of select="@id"/>
+        </xsl:attribute>
+        <xsl:for-each select="func:refered_elements(.)">
+          <elt>
+            <xsl:attribute name="eltid">
+              <xsl:value-of select="@id"/>
+            </xsl:attribute>
+          </elt>
+        </xsl:for-each>
+      </list>
+    </xsl:for-each>
+  </xsl:variable>
+  <xsl:variable name="textstylelist_related_ns" select="exsl:node-set($textstylelist_related)"/>
+  <func:function name="func:json_expressions">
+    <xsl:param name="expressions"/>
+    <xsl:param name="label"/>
+    <xsl:choose>
+      <xsl:when test="$label">
+        <xsl:variable name="suffixes" select="str:split($label)"/>
+        <xsl:variable name="res">
+          <xsl:for-each select="$suffixes">
+            <expression>
+              <xsl:variable name="suffix" select="."/>
+              <xsl:variable name="pos" select="position()"/>
+              <xsl:variable name="expr" select="$expressions[position() &lt;= $pos][last()]/expression"/>
+              <xsl:choose>
+                <xsl:when test="contains($suffix,'=')">
+                  <xsl:variable name="name" select="substring-before($suffix,'=')"/>
+                  <xsl:if test="$expr/@name[. != $name]">
+                    <xsl:message terminate="yes">
+                      <xsl:text>JsonTable : missplaced '=' or inconsistent names in Json data expressions.</xsl:text>
+                    </xsl:message>
+                  </xsl:if>
+                  <xsl:attribute name="name">
+                    <xsl:value-of select="$name"/>
+                  </xsl:attribute>
+                  <xsl:attribute name="content">
+                    <xsl:value-of select="$expr/@content"/>
+                    <xsl:value-of select="substring-after($suffix,'=')"/>
+                  </xsl:attribute>
+                </xsl:when>
+                <xsl:otherwise>
+                  <xsl:copy-of select="$expr/@name"/>
+                  <xsl:attribute name="content">
+                    <xsl:value-of select="$expr/@content"/>
+                    <xsl:value-of select="$suffix"/>
+                  </xsl:attribute>
+                </xsl:otherwise>
+              </xsl:choose>
+            </expression>
+          </xsl:for-each>
+        </xsl:variable>
+        <func:result select="exsl:node-set($res)"/>
+      </xsl:when>
+      <xsl:otherwise>
+        <func:result select="$expressions"/>
+      </xsl:otherwise>
+    </xsl:choose>
+  </func:function>
+  <xsl:variable name="initexpr">
+    <expression>
+      <xsl:attribute name="content">
+        <xsl:text>jdata</xsl:text>
+      </xsl:attribute>
+    </expression>
+  </xsl:variable>
+  <xsl:variable name="initexpr_ns" select="exsl:node-set($initexpr)"/>
   <xsl:template mode="json_table_elt_render" match="svg:use">
-    <xsl:param name="value_expr"/>
-    <xsl:variable select="substring-after(@xlink:href,'#')" name="targetid"/>
-    <xsl:variable select="$hmi_lists[(@id | */@id) = $targetid]" name="from_list"/>
-    <xsl:variable select="$hmi_textstylelists[(@id | */@id) = $targetid]" name="from_textstylelist"/>
+    <xsl:param name="expressions"/>
+    <xsl:variable name="targetid" select="substring-after(@xlink:href,'#')"/>
+    <xsl:variable name="from_list" select="$hmi_lists[(@id | */@id) = $targetid]"/>
     <xsl:choose>
       <xsl:when test="count($from_list) &gt; 0">
         <xsl:text>        id("</xsl:text>
@@ -3497,29 +3651,13 @@
         <xsl:text>            "#"+hmi_widgets["</xsl:text>
         <xsl:value-of select="$from_list/@id"/>
         <xsl:text>"].items[</xsl:text>
-        <xsl:value-of select="$value_expr"/>
-        <xsl:text>]);
-</xsl:text>
-      </xsl:when>
-      <xsl:when test="count($from_textstylelist) &gt; 0">
-        <xsl:text>        console.log("from_textsylelist","</xsl:text>
-        <xsl:value-of select="@id"/>
-        <xsl:text>", "</xsl:text>
-        <xsl:value-of select="$value_expr"/>
-        <xsl:text>", </xsl:text>
-        <xsl:value-of select="$value_expr"/>
-        <xsl:text>,
-</xsl:text>
-        <xsl:text>            hmi_widgets["</xsl:text>
-        <xsl:value-of select="$from_textstylelist/@id"/>
-        <xsl:text>"].items[</xsl:text>
-        <xsl:value-of select="$value_expr"/>
+        <xsl:value-of select="$expressions/expression[1]/@content"/>
         <xsl:text>]);
 </xsl:text>
       </xsl:when>
       <xsl:otherwise>
         <xsl:message terminate="no">
-          <xsl:text>Clones (svg:use) in JsonTable Widget must point to a valid HMI:List or HMI:TextStyleList widget or item. Reference "</xsl:text>
+          <xsl:text>Clones (svg:use) in JsonTable Widget must point to a valid HMI:List widget or item. Reference "</xsl:text>
           <xsl:value-of select="@xlink:href"/>
           <xsl:text>" is not valid and will not be updated.</xsl:text>
         </xsl:message>
@@ -3527,59 +3665,194 @@
     </xsl:choose>
   </xsl:template>
   <xsl:template mode="json_table_elt_render" match="svg:text">
-    <xsl:param name="value_expr"/>
-    <xsl:text>        id("</xsl:text>
+    <xsl:param name="expressions"/>
+    <xsl:variable name="value_expr" select="$expressions/expression[1]/@content"/>
+    <xsl:variable name="original" select="@original"/>
+    <xsl:variable name="from_textstylelist" select="$textstylelist_related_ns/list[elt/@eltid = $original]"/>
+    <xsl:choose>
+      <xsl:when test="count($from_textstylelist) &gt; 0">
+        <xsl:variable name="content_expr" select="$expressions/expression[2]/@content"/>
+        <xsl:if test="string-length($content_expr) = 0 or $expressions/expression[2]/@name != 'textContent'">
+          <xsl:message terminate="yes">
+            <xsl:text>Clones (svg:use) in JsonTable Widget pointing to a HMI:TextStyleList widget or item must have a "textContent=.someVal" assignement following value expression in label.</xsl:text>
+          </xsl:message>
+        </xsl:if>
+        <xsl:text>        {
+</xsl:text>
+        <xsl:text>          let elt = id("</xsl:text>
+        <xsl:value-of select="@id"/>
+        <xsl:text>");
+</xsl:text>
+        <xsl:text>          elt.textContent = String(</xsl:text>
+        <xsl:value-of select="$content_expr"/>
+        <xsl:text>);
+</xsl:text>
+        <xsl:text>          elt.style = hmi_widgets["</xsl:text>
+        <xsl:value-of select="$from_textstylelist/@listid"/>
+        <xsl:text>"].styles[</xsl:text>
+        <xsl:value-of select="$value_expr"/>
+        <xsl:text>];
+</xsl:text>
+        <xsl:text>        }
+</xsl:text>
+      </xsl:when>
+      <xsl:otherwise>
+        <xsl:text>        id("</xsl:text>
+        <xsl:value-of select="@id"/>
+        <xsl:text>").textContent = String(</xsl:text>
+        <xsl:value-of select="$value_expr"/>
+        <xsl:text>);
+</xsl:text>
+      </xsl:otherwise>
+    </xsl:choose>
+  </xsl:template>
+  <func:function name="func:filter_non_widget_label">
+    <xsl:param name="elt"/>
+    <xsl:param name="widget_elts"/>
+    <xsl:variable name="eltid">
+      <xsl:choose>
+        <xsl:when test="$elt/@original">
+          <xsl:value-of select="$elt/@original"/>
+        </xsl:when>
+        <xsl:otherwise>
+          <xsl:value-of select="$elt/@id"/>
+        </xsl:otherwise>
+      </xsl:choose>
+    </xsl:variable>
+    <func:result select="$widget_elts[@id=$eltid]/@inkscape:label"/>
+  </func:function>
+  <xsl:template mode="json_table_render_except_comments" match="svg:*">
+    <xsl:param name="expressions"/>
+    <xsl:param name="widget_elts"/>
+    <xsl:variable name="label" select="func:filter_non_widget_label(., $widget_elts)"/>
+    <xsl:if test="not(starts-with($label,'#'))">
+      <xsl:apply-templates mode="json_table_render" select=".">
+        <xsl:with-param name="expressions" select="$expressions"/>
+        <xsl:with-param name="widget_elts" select="$widget_elts"/>
+        <xsl:with-param name="label" select="$label"/>
+      </xsl:apply-templates>
+    </xsl:if>
+  </xsl:template>
+  <xsl:template mode="json_table_render" match="svg:*">
+    <xsl:param name="expressions"/>
+    <xsl:param name="widget_elts"/>
+    <xsl:param name="label"/>
+    <xsl:variable name="new_expressions" select="func:json_expressions($expressions, $label)"/>
+    <xsl:variable name="elt" select="."/>
+    <xsl:for-each select="$new_expressions/expression[position() &gt; 1][starts-with(@name,'onClick')]">
+      <xsl:text>        id("</xsl:text>
+      <xsl:value-of select="$elt/@id"/>
+      <xsl:text>").setAttribute("onclick", "hmi_widgets['"+this.element_id+"'].on_click(evt, '</xsl:text>
+      <xsl:value-of select="@name"/>
+      <xsl:text>', '"+</xsl:text>
+      <xsl:value-of select="@content"/>
+      <xsl:text>+"')");
+</xsl:text>
+    </xsl:for-each>
+    <xsl:apply-templates mode="json_table_elt_render" select=".">
+      <xsl:with-param name="expressions" select="$new_expressions"/>
+    </xsl:apply-templates>
+  </xsl:template>
+  <xsl:template mode="json_table_render" match="svg:g">
+    <xsl:param name="expressions"/>
+    <xsl:param name="widget_elts"/>
+    <xsl:param name="label"/>
+    <xsl:variable name="gid" select="@id"/>
+    <xsl:variable name="varprefix">
+      <xsl:text>obj_</xsl:text>
+      <xsl:value-of select="$gid"/>
+      <xsl:text>_</xsl:text>
+    </xsl:variable>
+    <xsl:text>        try {
+</xsl:text>
+    <xsl:for-each select="$expressions/expression">
+      <xsl:text>         let </xsl:text>
+      <xsl:value-of select="$varprefix"/>
+      <xsl:value-of select="position()"/>
+      <xsl:text> = </xsl:text>
+      <xsl:value-of select="@content"/>
+      <xsl:text>;
+</xsl:text>
+      <xsl:text>         if(</xsl:text>
+      <xsl:value-of select="$varprefix"/>
+      <xsl:value-of select="position()"/>
+      <xsl:text> == undefined) {
+</xsl:text>
+      <xsl:text>              console.log("</xsl:text>
+      <xsl:value-of select="$varprefix"/>
+      <xsl:value-of select="position()"/>
+      <xsl:text> = </xsl:text>
+      <xsl:value-of select="@content"/>
+      <xsl:text>");
+</xsl:text>
+      <xsl:text>              throw null;
+</xsl:text>
+      <xsl:text>         }
+</xsl:text>
+    </xsl:for-each>
+    <xsl:variable name="new_expressions">
+      <xsl:for-each select="$expressions/expression">
+        <xsl:copy>
+          <xsl:copy-of select="@name"/>
+          <xsl:attribute name="content">
+            <xsl:value-of select="$varprefix"/>
+            <xsl:value-of select="position()"/>
+          </xsl:attribute>
+        </xsl:copy>
+      </xsl:for-each>
+    </xsl:variable>
+    <xsl:text>          id("</xsl:text>
     <xsl:value-of select="@id"/>
-    <xsl:text>").textContent = String(</xsl:text>
-    <xsl:value-of select="$value_expr"/>
-    <xsl:text>);
-</xsl:text>
-  </xsl:template>
-  <xsl:template mode="json_table_render" match="svg:*">
-    <xsl:param name="objname"/>
-    <xsl:apply-templates mode="json_table_elt_render" select=".">
-      <xsl:with-param name="value_expr">
-        <xsl:value-of select="$objname"/>
-        <xsl:value-of select="substring-before(@inkscape:label, ' ')"/>
-      </xsl:with-param>
+    <xsl:text>").setAttribute("style", "</xsl:text>
+    <xsl:value-of select="@style"/>
+    <xsl:text>");
+</xsl:text>
+    <xsl:apply-templates mode="json_table_render_except_comments" select="*">
+      <xsl:with-param name="expressions" select="func:json_expressions(exsl:node-set($new_expressions), $label)"/>
+      <xsl:with-param name="widget_elts" select="$widget_elts"/>
     </xsl:apply-templates>
-  </xsl:template>
-  <xsl:template mode="json_table_render" match="svg:g">
-    <xsl:param name="objname"/>
-    <xsl:text>        let obj_</xsl:text>
-    <xsl:value-of select="@id"/>
-    <xsl:text> = </xsl:text>
-    <xsl:value-of select="$objname"/>
-    <xsl:value-of select="substring-before(@inkscape:label, ' ')"/>
-    <xsl:text>;
-</xsl:text>
-    <xsl:apply-templates mode="json_table_render" select="*[@inkscape:label]">
-      <xsl:with-param name="objname">
-        <xsl:text>obj_</xsl:text>
-        <xsl:value-of select="@id"/>
-      </xsl:with-param>
-    </xsl:apply-templates>
+    <xsl:text>        } catch(err) {
+</xsl:text>
+    <xsl:text>          id("</xsl:text>
+    <xsl:value-of select="$gid"/>
+    <xsl:text>").setAttribute("style", "display:none");
+</xsl:text>
+    <xsl:text>        }
+</xsl:text>
   </xsl:template>
   <xsl:template mode="widget_defs" match="widget[@type='JsonTable']">
     <xsl:param name="hmi_element"/>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>data</xsl:text>
       </xsl:with-param>
     </xsl:call-template>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>forward backward cursor</xsl:text>
       </xsl:with-param>
-      <xsl:with-param select="'no'" name="mandatory"/>
+      <xsl:with-param name="mandatory" select="'no'"/>
     </xsl:call-template>
-    <xsl:variable select="$result_svg_ns//*[@id = $hmi_element/@id]/*[@inkscape:label = 'data']" name="data_elt"/>
-    <xsl:text>    spread_json_data: function(jdata) {
-</xsl:text>
-    <xsl:apply-templates mode="json_table_render" select="$data_elt/*">
-      <xsl:with-param select="'jdata'" name="objname"/>
+    <xsl:variable name="data_elt" select="$result_svg_ns//*[@id = $hmi_element/@id]/*[@inkscape:label = 'data']"/>
+    <xsl:text>    visible: </xsl:text>
+    <xsl:value-of select="count($data_elt/*[@inkscape:label])"/>
+    <xsl:text>,
+</xsl:text>
+    <xsl:text>    spread_json_data: function(janswer) {
+</xsl:text>
+    <xsl:text>        let [range,position,jdata] = janswer;
+</xsl:text>
+    <xsl:text>        this.apply_hmi_value(1, range);
+</xsl:text>
+    <xsl:text>        this.apply_hmi_value(2, position);
+</xsl:text>
+    <xsl:text>        console.log(range,position,jdata);
+</xsl:text>
+    <xsl:apply-templates mode="json_table_render_except_comments" select="$data_elt">
+      <xsl:with-param name="expressions" select="$initexpr_ns"/>
+      <xsl:with-param name="widget_elts" select="$hmi_element/*[@inkscape:label = 'data']/descendant::svg:*"/>
     </xsl:apply-templates>
     <xsl:text>    }
 </xsl:text>
@@ -3587,38 +3860,38 @@
   <xsl:template name="jump_widget_activity">
     <xsl:param name="hmi_element"/>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>active inactive</xsl:text>
       </xsl:with-param>
-      <xsl:with-param select="'no'" name="mandatory"/>
+      <xsl:with-param name="mandatory" select="'no'"/>
     </xsl:call-template>
   </xsl:template>
   <xsl:template name="jump_widget_disability">
     <xsl:param name="hmi_element"/>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>disabled</xsl:text>
       </xsl:with-param>
-      <xsl:with-param select="'no'" name="mandatory"/>
+      <xsl:with-param name="mandatory" select="'no'"/>
     </xsl:call-template>
   </xsl:template>
   <xsl:template mode="widget_defs" match="widget[@type='Jump']">
     <xsl:param name="hmi_element"/>
     <xsl:variable name="activity">
       <xsl:call-template name="jump_widget_activity">
-        <xsl:with-param select="$hmi_element" name="hmi_element"/>
+        <xsl:with-param name="hmi_element" select="$hmi_element"/>
       </xsl:call-template>
     </xsl:variable>
-    <xsl:variable select="string-length($activity)&gt;0" name="have_activity"/>
+    <xsl:variable name="have_activity" select="string-length($activity)&gt;0"/>
     <xsl:value-of select="$activity"/>
     <xsl:variable name="disability">
       <xsl:call-template name="jump_widget_disability">
-        <xsl:with-param select="$hmi_element" name="hmi_element"/>
+        <xsl:with-param name="hmi_element" select="$hmi_element"/>
       </xsl:call-template>
     </xsl:variable>
-    <xsl:variable select="$have_activity and string-length($disability)&gt;0" name="have_disability"/>
+    <xsl:variable name="have_disability" select="$have_activity and string-length($disability)&gt;0"/>
     <xsl:value-of select="$disability"/>
     <xsl:if test="$have_activity">
       <xsl:text>    active: false,
@@ -3821,9 +4094,9 @@
     <xsl:text>var keypads = {
 </xsl:text>
     <xsl:for-each select="$keypads_descs">
-      <xsl:variable select="@id" name="keypad_id"/>
+      <xsl:variable name="keypad_id" select="@id"/>
       <xsl:for-each select="arg">
-        <xsl:variable select="$geometry[@Id = $keypad_id]" name="g"/>
+        <xsl:variable name="g" select="$geometry[@Id = $keypad_id]"/>
         <xsl:text>    "</xsl:text>
         <xsl:value-of select="@value"/>
         <xsl:text>":["</xsl:text>
@@ -4020,11 +4293,25 @@
 </xsl:text>
     <xsl:text>     on_Enter_click() {
 </xsl:text>
-    <xsl:text>         end_modal.call(this);
-</xsl:text>
-    <xsl:text>         let callback_obj = this.result_callback_obj;
-</xsl:text>
-    <xsl:text>         callback_obj.edit_callback(this.editstr);
+    <xsl:text>         let coercedval = (typeof this.initial) == "number" ? Number(this.editstr) : this.editstr;
+</xsl:text>
+    <xsl:text>         if(typeof coercedval == 'number' &amp;&amp; isNaN(coercedval)){
+</xsl:text>
+    <xsl:text>             // revert to initial so it explicitely shows input was ignored
+</xsl:text>
+    <xsl:text>             this.editstr = String(this.initial);
+</xsl:text>
+    <xsl:text>             this.update();
+</xsl:text>
+    <xsl:text>         } else { 
+</xsl:text>
+    <xsl:text>             let callback_obj = this.result_callback_obj;
+</xsl:text>
+    <xsl:text>             end_modal.call(this);
+</xsl:text>
+    <xsl:text>             callback_obj.edit_callback(coercedval);
+</xsl:text>
+    <xsl:text>         }
 </xsl:text>
     <xsl:text>     }
 </xsl:text>
@@ -4118,7 +4405,7 @@
 </xsl:text>
     <xsl:text>         show_modal.call(this,size);
 </xsl:text>
-    <xsl:text>         this.editstr = initial;
+    <xsl:text>         this.editstr = String(initial);
 </xsl:text>
     <xsl:text>         this.result_callback_obj = callback_obj;
 </xsl:text>
@@ -4128,6 +4415,10 @@
 </xsl:text>
     <xsl:text>         this.caps = false;
 </xsl:text>
+    <xsl:text>         this.initial = initial;
+</xsl:text>
+    <xsl:text>
+</xsl:text>
     <xsl:text>         this.update();
 </xsl:text>
     <xsl:text>     }
@@ -4168,25 +4459,25 @@
   <xsl:template mode="widget_defs" match="widget[@type='Keypad']">
     <xsl:param name="hmi_element"/>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>Esc Enter BackSpace Keys Info Value</xsl:text>
       </xsl:with-param>
     </xsl:call-template>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>Sign Space NumDot position</xsl:text>
       </xsl:with-param>
-      <xsl:with-param select="'no'" name="mandatory"/>
+      <xsl:with-param name="mandatory" select="'no'"/>
     </xsl:call-template>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>CapsLock Shift</xsl:text>
       </xsl:with-param>
-      <xsl:with-param select="'no'" name="mandatory"/>
-      <xsl:with-param select="'active inactive'" name="subelements"/>
+      <xsl:with-param name="mandatory" select="'no'"/>
+      <xsl:with-param name="subelements" select="'active inactive'"/>
     </xsl:call-template>
     <xsl:text>    init: function() {
 </xsl:text>
@@ -4232,7 +4523,7 @@
 </xsl:text>
     <xsl:text>
 </xsl:text>
-    <xsl:variable select="$geometry[@Id = $hmi_element/@id]" name="g"/>
+    <xsl:variable name="g" select="$geometry[@Id = $hmi_element/@id]"/>
     <xsl:text>    coordinates: [</xsl:text>
     <xsl:value-of select="$g/@x"/>
     <xsl:text>, </xsl:text>
@@ -4240,13 +4531,13 @@
     <xsl:text>],
 </xsl:text>
   </xsl:template>
-  <xsl:template mode="widget_defs" match="widget[@type='List' or @type='TextStyleList']">
+  <xsl:template mode="widget_defs" match="widget[@type='List']">
     <xsl:param name="hmi_element"/>
     <xsl:text>    items: {
 </xsl:text>
     <xsl:for-each select="$hmi_element/*[@inkscape:label]">
       <xsl:text>        </xsl:text>
-      <xsl:value-of select="func:escape_quotes(@inkscape:label)"/>
+      <xsl:value-of select="@inkscape:label"/>
       <xsl:text>: "</xsl:text>
       <xsl:value-of select="@id"/>
       <xsl:text>",
@@ -4255,6 +4546,22 @@
     <xsl:text>    },
 </xsl:text>
   </xsl:template>
+  <xsl:template mode="widget_defs" match="widget[@type='TextStyleList']">
+    <xsl:param name="hmi_element"/>
+    <xsl:text>    styles: {
+</xsl:text>
+    <xsl:for-each select="$hmi_element/*[@inkscape:label]">
+      <xsl:variable name="style" select="func:refered_elements(.)[self::svg:text]/@style"/>
+      <xsl:text>        </xsl:text>
+      <xsl:value-of select="@inkscape:label"/>
+      <xsl:text>: "</xsl:text>
+      <xsl:value-of select="$style"/>
+      <xsl:text>",
+</xsl:text>
+    </xsl:for-each>
+    <xsl:text>    },
+</xsl:text>
+  </xsl:template>
   <xsl:template mode="widget_class" match="widget[@type='Meter']">
     <xsl:text>class MeterWidget extends Widget{
 </xsl:text>
@@ -4312,17 +4619,17 @@
   <xsl:template mode="widget_defs" match="widget[@type='Meter']">
     <xsl:param name="hmi_element"/>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>needle range</xsl:text>
       </xsl:with-param>
     </xsl:call-template>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>value min max</xsl:text>
       </xsl:with-param>
-      <xsl:with-param select="'no'" name="mandatory"/>
+      <xsl:with-param name="mandatory" select="'no'"/>
     </xsl:call-template>
     <xsl:text>
 </xsl:text>
@@ -4413,9 +4720,9 @@
     <xsl:param name="hmi_element"/>
     <xsl:text>    choices: [
 </xsl:text>
-    <xsl:variable select="'^(&quot;[^&quot;].*&quot;|\-?[0-9]+|false|true)(#.*)?$'" name="regex"/>
+    <xsl:variable name="regex" select="'^(&quot;[^&quot;].*&quot;|\-?[0-9]+|false|true)(#.*)?$'"/>
     <xsl:for-each select="$result_svg_ns//*[@id = $hmi_element/@id]//*[regexp:test(@inkscape:label,$regex)]">
-      <xsl:variable select="regexp:match(@inkscape:label,$regex)[2]" name="literal"/>
+      <xsl:variable name="literal" select="regexp:match(@inkscape:label,$regex)[2]"/>
       <xsl:text>        {
 </xsl:text>
       <xsl:text>            elt:id("</xsl:text>
@@ -4447,47 +4754,163 @@
 </xsl:text>
     <xsl:text>    range = undefined;
 </xsl:text>
+    <xsl:text>    handle_orig = undefined;
+</xsl:text>
+    <xsl:text>    scroll_size = 10;
+</xsl:text>
+    <xsl:text>    min_size = 0.07;
+</xsl:text>
     <xsl:text>    fi = undefined;
 </xsl:text>
-    <xsl:text>    svg_dist = undefined;
+    <xsl:text>    curr_value = 0;
 </xsl:text>
     <xsl:text>    drag = false;
 </xsl:text>
     <xsl:text>    enTimer = false;
 </xsl:text>
+    <xsl:text>    handle_click = undefined;
+</xsl:text>
+    <xsl:text>    last_drag = false;
+</xsl:text>
     <xsl:text>
 </xsl:text>
     <xsl:text>    dispatch(value) {
 </xsl:text>
+    <xsl:text>        //save current value inside widget
+</xsl:text>
+    <xsl:text>        this.curr_value = value;
+</xsl:text>
+    <xsl:text>
+</xsl:text>
     <xsl:text>        if(this.value_elt)
 </xsl:text>
     <xsl:text>            this.value_elt.textContent = String(value);
 </xsl:text>
     <xsl:text>
 </xsl:text>
-    <xsl:text>        this.update_DOM(value, this.handle_elt);
-</xsl:text>
-    <xsl:text>
+    <xsl:text>        //don't update if draging and setpoint ghost doesn't exist
+</xsl:text>
+    <xsl:text>        if(!this.drag || (this.setpoint_elt != undefined)){
+</xsl:text>
+    <xsl:text>            this.update_DOM(value, this.handle_elt);
+</xsl:text>
+    <xsl:text>        }
 </xsl:text>
     <xsl:text>    }
 </xsl:text>
     <xsl:text>
 </xsl:text>
-    <xsl:text>    last_drag = false;
-</xsl:text>
-    <xsl:text>
-</xsl:text>
     <xsl:text>    update_DOM(value, elt){
 </xsl:text>
     <xsl:text>        let [min,max,start,totallength] = this.range;
 </xsl:text>
-    <xsl:text>        let length = Math.max(0,Math.min(totallength,(Number(value)-min)*totallength/(max-min)));
-</xsl:text>
-    <xsl:text>        let tip = this.range_elt.getPointAtLength(length);
-</xsl:text>
-    <xsl:text>        elt.setAttribute('transform',"translate("+(tip.x-start.x)+","+(tip.y-start.y)+")");
-</xsl:text>
-    <xsl:text>
+    <xsl:text>        // check if handle is resizeable
+</xsl:text>
+    <xsl:text>        if (this.scroll_size != undefined){ //size changes
+</xsl:text>
+    <xsl:text>            //get parameters
+</xsl:text>
+    <xsl:text>            let length = Math.max(min,Math.min(max,(Number(value)-min)*max/(max-min)));
+</xsl:text>
+    <xsl:text>            let tip = this.range_elt.getPointAtLength(length);
+</xsl:text>
+    <xsl:text>            let handle_min = totallength*this.min_size;
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>            let step = 1;
+</xsl:text>
+    <xsl:text>            //check if range is bigger than  max displayed and recalculate step
+</xsl:text>
+    <xsl:text>            if ((totallength/handle_min) &lt; (max-min+1)){
+</xsl:text>
+    <xsl:text>                step = (max-min+1)/(totallength/handle_min-1);
+</xsl:text>
+    <xsl:text>            }
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>            let kx,ky,offseY,offseX = undefined;
+</xsl:text>
+    <xsl:text>            //scale on x or y axes
+</xsl:text>
+    <xsl:text>            if (this.fi &gt; 0.75){
+</xsl:text>
+    <xsl:text>                //get scale factor
+</xsl:text>
+    <xsl:text>                if(step &gt; 1){
+</xsl:text>
+    <xsl:text>                    ky = handle_min/this.handle_orig.height;
+</xsl:text>
+    <xsl:text>                }
+</xsl:text>
+    <xsl:text>                else{
+</xsl:text>
+    <xsl:text>                    ky = (totallength-handle_min*(max-min))/this.handle_orig.height;
+</xsl:text>
+    <xsl:text>                }
+</xsl:text>
+    <xsl:text>                kx = 1;
+</xsl:text>
+    <xsl:text>                //get 0 offset to stay inside range
+</xsl:text>
+    <xsl:text>                offseY = start.y - (this.handle_orig.height + this.handle_orig.y) * ky;
+</xsl:text>
+    <xsl:text>                offseX = 0;
+</xsl:text>
+    <xsl:text>                //get distance from value
+</xsl:text>
+    <xsl:text>                tip.y =this.range_elt.getPointAtLength(0).y - length/step *handle_min;
+</xsl:text>
+    <xsl:text>            }
+</xsl:text>
+    <xsl:text>            else{
+</xsl:text>
+    <xsl:text>                //get scale factor
+</xsl:text>
+    <xsl:text>                if(step &gt; 1){
+</xsl:text>
+    <xsl:text>                    kx = handle_min/this.handle_orig.width;
+</xsl:text>
+    <xsl:text>                }
+</xsl:text>
+    <xsl:text>                else{
+</xsl:text>
+    <xsl:text>                    kx = (totallength-handle_min*(max-min))/this.handle_orig.width;
+</xsl:text>
+    <xsl:text>                }
+</xsl:text>
+    <xsl:text>                ky = 1;
+</xsl:text>
+    <xsl:text>                //get 0 offset to stay inside range
+</xsl:text>
+    <xsl:text>                offseX = start.x - (this.handle_orig.x * kx);
+</xsl:text>
+    <xsl:text>                offseY = 0;
+</xsl:text>
+    <xsl:text>                //get distance from value
+</xsl:text>
+    <xsl:text>                tip.x =this.range_elt.getPointAtLength(0).x + length/step *handle_min;
+</xsl:text>
+    <xsl:text>            }
+</xsl:text>
+    <xsl:text>            elt.setAttribute('transform',"matrix("+(kx)+" 0 0 "+(ky)+" "+(tip.x-start.x+offseX)+" "+(tip.y-start.y+offseY)+")");
+</xsl:text>
+    <xsl:text>        }
+</xsl:text>
+    <xsl:text>        else{ //size stays the same
+</xsl:text>
+    <xsl:text>            let length = Math.max(0,Math.min(totallength,(Number(value)-min)*totallength/(max-min)));
+</xsl:text>
+    <xsl:text>            let tip = this.range_elt.getPointAtLength(length);
+</xsl:text>
+    <xsl:text>            elt.setAttribute('transform',"translate("+(tip.x-start.x)+","+(tip.y-start.y)+")");
+</xsl:text>
+    <xsl:text>        }
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>        // show or hide ghost if exists
 </xsl:text>
     <xsl:text>        if(this.setpoint_elt != undefined){
 </xsl:text>
@@ -4515,6 +4938,8 @@
 </xsl:text>
     <xsl:text>    on_release(evt) {
 </xsl:text>
+    <xsl:text>        //unbind events
+</xsl:text>
     <xsl:text>        window.removeEventListener("touchmove", this.on_bound_drag, true);
 </xsl:text>
     <xsl:text>        window.removeEventListener("mousemove", this.on_bound_drag, true);
@@ -4527,26 +4952,38 @@
 </xsl:text>
     <xsl:text>        window.removeEventListener("touchcancel", this.bound_on_release, true);
 </xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>        //reset drag flag
+</xsl:text>
     <xsl:text>        if(this.drag){
 </xsl:text>
     <xsl:text>            this.drag = false;
 </xsl:text>
     <xsl:text>        }
 </xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>        // get final position
+</xsl:text>
     <xsl:text>        this.update_position(evt);
 </xsl:text>
+    <xsl:text>
+</xsl:text>
     <xsl:text>    }
 </xsl:text>
     <xsl:text>
 </xsl:text>
-    <xsl:text>
-</xsl:text>
     <xsl:text>    on_drag(evt){
 </xsl:text>
+    <xsl:text>        //ignore drag event for X amount of time and if not selected
+</xsl:text>
     <xsl:text>        if(this.enTimer &amp;&amp; this.drag){
 </xsl:text>
     <xsl:text>            this.update_position(evt);
 </xsl:text>
+    <xsl:text>
+</xsl:text>
     <xsl:text>            //reset timer
 </xsl:text>
     <xsl:text>            this.enTimer = false;
@@ -4563,16 +5000,18 @@
 </xsl:text>
     <xsl:text>        var html_dist = 0;
 </xsl:text>
+    <xsl:text>        let [min,max,start,totallength] = this.range;
+</xsl:text>
     <xsl:text>
 </xsl:text>
     <xsl:text>        //calculate size of widget in html
 </xsl:text>
     <xsl:text>        var range_borders = this.range_elt.getBoundingClientRect();
 </xsl:text>
+    <xsl:text>        var [minX,minY,maxX,maxY] = [range_borders.left,range_borders.bottom,range_borders.right,range_borders.top];
+</xsl:text>
     <xsl:text>        var range_length = Math.sqrt( range_borders.height*range_borders.height + range_borders.width*range_borders.width );
 </xsl:text>
-    <xsl:text>        var [minX,minY,maxX,maxY] = [range_borders.left,range_borders.bottom,range_borders.right,range_borders.top];
-</xsl:text>
     <xsl:text>
 </xsl:text>
     <xsl:text>        //get range and mouse coordinates
@@ -4599,112 +5038,240 @@
 </xsl:text>
     <xsl:text>
 </xsl:text>
-    <xsl:text>        //get handle distance from mouse position
-</xsl:text>
-    <xsl:text>        if (minX &gt; mouseX &amp;&amp; minY &lt; mouseY){
-</xsl:text>
-    <xsl:text>            html_dist = 0;
+    <xsl:text>        // calculate position
+</xsl:text>
+    <xsl:text>        if (this.handle_click){ //if clicked on handle
+</xsl:text>
+    <xsl:text>            let moveDist = 0, resizeAdd = 0;
+</xsl:text>
+    <xsl:text>            let range_percent = 1;
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>            //set paramters for resizeable handle
+</xsl:text>
+    <xsl:text>            if (this.scroll_size != undefined){
+</xsl:text>
+    <xsl:text>                // add one more object to stay inside range
+</xsl:text>
+    <xsl:text>                resizeAdd = 1;
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>                //chack if range is bigger than display option and
+</xsl:text>
+    <xsl:text>                // calculate percent of range with out handle
+</xsl:text>
+    <xsl:text>                if(((max/(max*this.min_size)) &lt; (max-min+1))){
+</xsl:text>
+    <xsl:text>                    range_percent = 1-this.min_size;
+</xsl:text>
+    <xsl:text>                }
+</xsl:text>
+    <xsl:text>                else{
+</xsl:text>
+    <xsl:text>                    range_percent = 1-(max-max*this.min_size*(max-min))/max;
+</xsl:text>
+    <xsl:text>                }
+</xsl:text>
+    <xsl:text>            }
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>            //calculate value difference on x or y axis
+</xsl:text>
+    <xsl:text>            if(this.fi &gt; 0.7){
+</xsl:text>
+    <xsl:text>                moveDist = ((max-min+resizeAdd)/(range_length*range_percent))*((this.handle_click[1]-mouseY)/Math.sin(this.fi));
+</xsl:text>
+    <xsl:text>            }
+</xsl:text>
+    <xsl:text>            else{
+</xsl:text>
+    <xsl:text>                moveDist = ((max-min+resizeAdd)/(range_length*range_percent))*((mouseX-this.handle_click[0])/Math.cos(this.fi));
+</xsl:text>
+    <xsl:text>            }
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>            this.curr_value = Math.ceil(this.handle_click[2] + moveDist);
 </xsl:text>
     <xsl:text>        }
 </xsl:text>
-    <xsl:text>        else if (maxX &lt; mouseX &amp;&amp; maxY &gt; mouseY){
-</xsl:text>
-    <xsl:text>            html_dist = range_length;
+    <xsl:text>        else{ //if clicked on widget
+</xsl:text>
+    <xsl:text>            //get handle distance from mouse position
+</xsl:text>
+    <xsl:text>            if (minX &gt; mouseX &amp;&amp; minY &lt; mouseY){
+</xsl:text>
+    <xsl:text>                html_dist = 0;
+</xsl:text>
+    <xsl:text>            }
+</xsl:text>
+    <xsl:text>            else if (maxX &lt; mouseX &amp;&amp; maxY &gt; mouseY){
+</xsl:text>
+    <xsl:text>                html_dist = range_length;
+</xsl:text>
+    <xsl:text>            }
+</xsl:text>
+    <xsl:text>            else{
+</xsl:text>
+    <xsl:text>                if(this.fi &gt; 0.7){
+</xsl:text>
+    <xsl:text>                    html_dist = (minY - mouseY)/Math.sin(this.fi);
+</xsl:text>
+    <xsl:text>                }
+</xsl:text>
+    <xsl:text>                else{
+</xsl:text>
+    <xsl:text>                    html_dist = (mouseX - minX)/Math.cos(this.fi);
+</xsl:text>
+    <xsl:text>                }
+</xsl:text>
+    <xsl:text>            }
+</xsl:text>
+    <xsl:text>            //calculate distance
+</xsl:text>
+    <xsl:text>            this.curr_value=Math.ceil((html_dist/range_length)*(this.range[1]-this.range[0])+this.range[0]);
 </xsl:text>
     <xsl:text>        }
 </xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>        //check if in range
+</xsl:text>
+    <xsl:text>        if (this.curr_value &gt; max){
+</xsl:text>
+    <xsl:text>            this.curr_value = max;
+</xsl:text>
+    <xsl:text>        }
+</xsl:text>
+    <xsl:text>        else if (this.curr_value &lt; min){
+</xsl:text>
+    <xsl:text>            this.curr_value = min;
+</xsl:text>
+    <xsl:text>        }
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>        this.apply_hmi_value(0, this.curr_value);
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>        //redraw handle
+</xsl:text>
+    <xsl:text>        this.request_animate();
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>    }
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>    animate(){
+</xsl:text>
+    <xsl:text>        // redraw handle on screen refresh
+</xsl:text>
+    <xsl:text>        // check if setpoint(ghost) handle exsist otherwise update main handle
+</xsl:text>
+    <xsl:text>        if(this.setpoint_elt != undefined){
+</xsl:text>
+    <xsl:text>            this.update_DOM(this.curr_value, this.setpoint_elt);
+</xsl:text>
+    <xsl:text>        }
+</xsl:text>
     <xsl:text>        else{
 </xsl:text>
-    <xsl:text>            // calculate distace
-</xsl:text>
-    <xsl:text>            if(this.fi &gt; 0.7){
-</xsl:text>
-    <xsl:text>                html_dist = (minY - mouseY)/Math.sin(this.fi);
+    <xsl:text>            this.update_DOM(this.curr_value, this.handle_elt);
+</xsl:text>
+    <xsl:text>        }
+</xsl:text>
+    <xsl:text>    }
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>    on_select(evt){
+</xsl:text>
+    <xsl:text>        //enable drag flag and timer
+</xsl:text>
+    <xsl:text>        this.drag = true;
+</xsl:text>
+    <xsl:text>        this.enTimer = true;
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>        //bind events
+</xsl:text>
+    <xsl:text>        window.addEventListener("touchmove", this.on_bound_drag, true);
+</xsl:text>
+    <xsl:text>        window.addEventListener("mousemove", this.on_bound_drag, true);
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>        window.addEventListener("mouseup", this.bound_on_release, true)
+</xsl:text>
+    <xsl:text>        window.addEventListener("touchend", this.bound_on_release, true);
+</xsl:text>
+    <xsl:text>        window.addEventListener("touchcancel", this.bound_on_release, true);
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>        // check if handle was pressed
+</xsl:text>
+    <xsl:text>        if (evt.currentTarget == this.handle_elt){
+</xsl:text>
+    <xsl:text>            //get mouse position on the handle
+</xsl:text>
+    <xsl:text>            let mouseX = undefined;
+</xsl:text>
+    <xsl:text>            let mouseY = undefined;
+</xsl:text>
+    <xsl:text>            if (evt.type.startsWith("touch")){
+</xsl:text>
+    <xsl:text>                mouseX = Math.ceil(evt.touches[0].clientX);
+</xsl:text>
+    <xsl:text>                mouseY = Math.ceil(evt.touches[0].clientY);
 </xsl:text>
     <xsl:text>            }
 </xsl:text>
     <xsl:text>            else{
 </xsl:text>
-    <xsl:text>                html_dist = (mouseX - minX)/Math.cos(this.fi);
+    <xsl:text>                mouseX = evt.pageX;
+</xsl:text>
+    <xsl:text>                mouseY = evt.pageY;
 </xsl:text>
     <xsl:text>            }
 </xsl:text>
-    <xsl:text>
-</xsl:text>
-    <xsl:text>            //check if in range
-</xsl:text>
-    <xsl:text>            if (html_dist &gt; range_length){
-</xsl:text>
-    <xsl:text>                html_dist = range_length;
-</xsl:text>
-    <xsl:text>            }
-</xsl:text>
-    <xsl:text>            else if (html_dist &lt; 0){
-</xsl:text>
-    <xsl:text>                html_dist = 0;
-</xsl:text>
-    <xsl:text>            }
-</xsl:text>
-    <xsl:text>
+    <xsl:text>            //save coordinates and orig value
+</xsl:text>
+    <xsl:text>            this.handle_click = [mouseX,mouseY,this.curr_value];
 </xsl:text>
     <xsl:text>        }
 </xsl:text>
-    <xsl:text>
-</xsl:text>
-    <xsl:text>        this.svg_dist=Math.ceil((html_dist/range_length)*this.range[1]);
-</xsl:text>
-    <xsl:text>
-</xsl:text>
-    <xsl:text>        this.apply_hmi_value(0, this.svg_dist);
-</xsl:text>
-    <xsl:text>
-</xsl:text>
-    <xsl:text>        // update ghost cursor
-</xsl:text>
-    <xsl:text>        if(this.setpoint_elt != undefined){
-</xsl:text>
-    <xsl:text>            this.request_animate();
+    <xsl:text>        else{
+</xsl:text>
+    <xsl:text>            // get new handle position and reset if handle was not pressed
+</xsl:text>
+    <xsl:text>            this.handle_click = undefined;
+</xsl:text>
+    <xsl:text>            this.update_position(evt);
 </xsl:text>
     <xsl:text>        }
 </xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>        //prevent next events
+</xsl:text>
+    <xsl:text>        evt.stopPropagation();
+</xsl:text>
     <xsl:text>    }
 </xsl:text>
     <xsl:text>
 </xsl:text>
-    <xsl:text>    animate(){
-</xsl:text>
-    <xsl:text>        this.update_DOM(this.svg_dist, this.setpoint_elt);
-</xsl:text>
-    <xsl:text>    }
-</xsl:text>
-    <xsl:text>
-</xsl:text>
-    <xsl:text>    on_select(evt){
-</xsl:text>
-    <xsl:text>        this.drag = true;
-</xsl:text>
-    <xsl:text>        this.enTimer = true;
-</xsl:text>
-    <xsl:text>        window.addEventListener("touchmove", this.on_bound_drag, true);
-</xsl:text>
-    <xsl:text>        window.addEventListener("mousemove", this.on_bound_drag, true);
-</xsl:text>
-    <xsl:text>
-</xsl:text>
-    <xsl:text>        window.addEventListener("mouseup", this.bound_on_release, true)
-</xsl:text>
-    <xsl:text>        window.addEventListener("touchend", this.bound_on_release, true);
-</xsl:text>
-    <xsl:text>        window.addEventListener("touchcancel", this.bound_on_release, true);
-</xsl:text>
-    <xsl:text>        this.update_position(evt);
-</xsl:text>
-    <xsl:text>    }
-</xsl:text>
-    <xsl:text>
-</xsl:text>
     <xsl:text>    init() {
 </xsl:text>
+    <xsl:text>        //set min max value if not defined
+</xsl:text>
     <xsl:text>        let min = this.min_elt ?
 </xsl:text>
     <xsl:text>                    Number(this.min_elt.textContent) :
@@ -4719,6 +5286,10 @@
 </xsl:text>
     <xsl:text>
 </xsl:text>
+    <xsl:text>        // save initial parameters
+</xsl:text>
+    <xsl:text>        this.range_elt.style.strokeMiterlimit="0";
+</xsl:text>
     <xsl:text>        this.range = [min, max, this.range_elt.getPointAtLength(0),this.range_elt.getTotalLength()];
 </xsl:text>
     <xsl:text>        let start = this.range_elt.getPointAtLength(0);
@@ -4727,7 +5298,11 @@
 </xsl:text>
     <xsl:text>        this.fi = Math.atan2(start.y-end.y, end.x-start.x);
 </xsl:text>
-    <xsl:text>
+    <xsl:text>        this.handle_orig = this.handle_elt.getBBox();
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>        //bind functions
 </xsl:text>
     <xsl:text>        this.bound_on_select = this.on_select.bind(this);
 </xsl:text>
@@ -4737,6 +5312,8 @@
 </xsl:text>
     <xsl:text>
 </xsl:text>
+    <xsl:text>        this.handle_elt.addEventListener("mousedown", this.bound_on_select);
+</xsl:text>
     <xsl:text>        this.element.addEventListener("mousedown", this.bound_on_select);
 </xsl:text>
     <xsl:text>        this.element.addEventListener("touchstart", this.bound_on_select);
@@ -4761,17 +5338,17 @@
   <xsl:template mode="widget_defs" match="widget[@type='Slider']">
     <xsl:param name="hmi_element"/>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>handle range</xsl:text>
       </xsl:with-param>
     </xsl:call-template>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>value min max setpoint</xsl:text>
       </xsl:with-param>
-      <xsl:with-param select="'no'" name="mandatory"/>
+      <xsl:with-param name="mandatory" select="'no'"/>
     </xsl:call-template>
     <xsl:text>
 </xsl:text>
@@ -4806,9 +5383,9 @@
     <xsl:param name="hmi_element"/>
     <xsl:text>    choices: [
 </xsl:text>
-    <xsl:variable select="'^(&quot;[^&quot;].*&quot;|\-?[0-9]+|false|true)(#.*)?$'" name="regex"/>
+    <xsl:variable name="regex" select="'^(&quot;[^&quot;].*&quot;|\-?[0-9]+|false|true)(#.*)?$'"/>
     <xsl:for-each select="$result_svg_ns//*[@id = $hmi_element/@id]//*[regexp:test(@inkscape:label,$regex)]">
-      <xsl:variable select="regexp:match(@inkscape:label,$regex)[2]" name="literal"/>
+      <xsl:variable name="literal" select="regexp:match(@inkscape:label,$regex)[2]"/>
       <xsl:text>        {
 </xsl:text>
       <xsl:text>            elt:id("</xsl:text>
@@ -4848,38 +5425,56 @@
 </xsl:text>
     <xsl:text>    dispatch(value) {
 </xsl:text>
-    <xsl:text>        this.state = value;
+    <xsl:text>        if(this.state != value){
+</xsl:text>
+    <xsl:text>            this.state = value;
+</xsl:text>
+    <xsl:text>            if (this.state) {
+</xsl:text>
+    <xsl:text>                this.active_elt.setAttribute("style", this.active_style);
+</xsl:text>
+    <xsl:text>                this.inactive_elt.setAttribute("style", "display:none");
+</xsl:text>
+    <xsl:text>            } else {
+</xsl:text>
+    <xsl:text>                this.inactive_elt.setAttribute("style", this.inactive_style);
+</xsl:text>
+    <xsl:text>                this.active_elt.setAttribute("style", "display:none");
+</xsl:text>
+    <xsl:text>            }
+</xsl:text>
+    <xsl:text>        }
+</xsl:text>
+    <xsl:text>    }
+</xsl:text>
+    <xsl:text>
+</xsl:text>
+    <xsl:text>    on_click(evt) {
 </xsl:text>
     <xsl:text>        if (this.state) {
 </xsl:text>
+    <xsl:text>            this.inactive_elt.setAttribute("style", this.inactive_style);
+</xsl:text>
+    <xsl:text>            this.active_elt.setAttribute("style", "display:none");
+</xsl:text>
+    <xsl:text>            this.state = 0;
+</xsl:text>
+    <xsl:text>        } else {
+</xsl:text>
     <xsl:text>            this.active_elt.setAttribute("style", this.active_style);
 </xsl:text>
     <xsl:text>            this.inactive_elt.setAttribute("style", "display:none");
 </xsl:text>
-    <xsl:text>            this.state = 0;
-</xsl:text>
-    <xsl:text>        } else {
-</xsl:text>
-    <xsl:text>            this.inactive_elt.setAttribute("style", this.inactive_style);
-</xsl:text>
-    <xsl:text>            this.active_elt.setAttribute("style", "display:none");
-</xsl:text>
     <xsl:text>            this.state = 1;
 </xsl:text>
     <xsl:text>        }
 </xsl:text>
+    <xsl:text>        this.apply_hmi_value(0, this.state);
+</xsl:text>
     <xsl:text>    }
 </xsl:text>
     <xsl:text>
 </xsl:text>
-    <xsl:text>    on_click(evt) {
-</xsl:text>
-    <xsl:text>        this.apply_hmi_value(0, this.state);
-</xsl:text>
-    <xsl:text>    }
-</xsl:text>
-    <xsl:text>
-</xsl:text>
     <xsl:text>    init() {
 </xsl:text>
     <xsl:text>        this.active_style = this.active_elt.style.cssText;
@@ -4888,6 +5483,10 @@
 </xsl:text>
     <xsl:text>        this.element.setAttribute("onclick", "hmi_widgets['"+this.element_id+"'].on_click(evt)");
 </xsl:text>
+    <xsl:text>        this.inactive_elt.setAttribute("style", this.inactive_style);
+</xsl:text>
+    <xsl:text>        this.active_elt.setAttribute("style", "display:none");
+</xsl:text>
     <xsl:text>    }
 </xsl:text>
     <xsl:text>}
@@ -4896,7 +5495,7 @@
   <xsl:template mode="widget_defs" match="widget[@type='ToggleButton']">
     <xsl:param name="hmi_element"/>
     <xsl:call-template name="defs_by_labels">
-      <xsl:with-param select="$hmi_element" name="hmi_element"/>
+      <xsl:with-param name="hmi_element" select="$hmi_element"/>
       <xsl:with-param name="labels">
         <xsl:text>active inactive</xsl:text>
       </xsl:with-param>
@@ -5432,8 +6031,6 @@
 </xsl:text>
           <xsl:text>    if(index &gt; last_remote_index){
 </xsl:text>
-          <xsl:text>        console.log("updated local variable ",index,value);
-</xsl:text>
           <xsl:text>        updates[index] = value;
 </xsl:text>
           <xsl:text>        requestHMIAnimation();
@@ -5784,8 +6381,6 @@
 </xsl:text>
           <xsl:text>    let [keypadid, xcoord, ycoord] = keypads[valuetype];
 </xsl:text>
-          <xsl:text>    console.log('XXX TODO : Edit value', path, valuetype, callback, initial, keypadid);
-</xsl:text>
           <xsl:text>    edit_callback = callback;
 </xsl:text>
           <xsl:text>    let widget = hmi_widgets[keypadid];
@@ -5874,8 +6469,6 @@
 </xsl:text>
           <xsl:text>            eltsub.active.setAttribute("style", eltsub.active_style);
 </xsl:text>
-          <xsl:text>    console.log("active", eltsub);
-</xsl:text>
           <xsl:text>};
 </xsl:text>
           <xsl:text>function widget_inactive_activable(eltsub) {
@@ -5890,8 +6483,6 @@
 </xsl:text>
           <xsl:text>            eltsub.inactive.setAttribute("style", eltsub.inactive_style);
 </xsl:text>
-          <xsl:text>    console.log("inactive", eltsub);
-</xsl:text>
           <xsl:text>};
 </xsl:text>
         </script>
diff -r 696301e869d5 -r 6ea4b7e1a9ed svghmi/inline_svg.ysl2
--- a/svghmi/inline_svg.ysl2	Wed Sep 16 09:42:26 2020 +0200
+++ b/svghmi/inline_svg.ysl2	Thu Sep 17 11:30:22 2020 +0200
@@ -10,7 +10,10 @@
 // Identity template :
 //  - copy every attributes 
 //  - copy every sub-elements
-template "@* | node()", mode="inline_svg" {
+
+svgtmpl "@*", mode="inline_svg" xsl:copy;
+
+template "node()", mode="inline_svg" {
   // use real xsl:copy instead copy-of alias from yslt.yml2
   if "not(@id = $discardable_elements/@id)"
       xsl:copy apply "@* | node()", mode="inline_svg";
@@ -51,19 +54,22 @@
 const "hmi_lists", "$hmi_elements[@id = $hmi_lists_descs/@id]";
 const "targets_not_to_unlink", "$hmi_lists/descendant-or-self::svg:*";
 const "to_unlink", "$hmi_elements[not(@id = $hmi_pages/@id)]/descendant-or-self::svg:use";
-svgtmpl "svg:use", mode="inline_svg"
-{
-    param "seed";
+
+def "func:is_unlinkable" {
+    param "targetid";
+    param "eltid";
+    result "$eltid = $to_unlink/@id and not($targetid = $targets_not_to_unlink/@id)";
+}
+
+svgtmpl "svg:use", mode="inline_svg"{
     const "targetid","substring-after(@xlink:href,'#')";
     choose {
-        when "@id = $to_unlink/@id and not($targetid = $targets_not_to_unlink/@id)" {
+        when "func:is_unlinkable($targetid, @id)" {
             call "unlink_clone" {
                 with "targetid", "$targetid";
-                with "seed","$seed";
-            }
-        }
-        otherwise
-            xsl:copy apply "@* | node()", mode="inline_svg";
+            }
+        }
+        otherwise xsl:copy apply "@*", mode="inline_svg";
     }
 }
 
@@ -87,11 +93,16 @@
 
 svgfunc "unlink_clone"{
     param "targetid";
-    param "seed";
+    param "seed","''";
     const "target", "//svg:*[@id = $targetid]";
-    const "seeded_id","concat($seed, @id)";
+    const "seeded_id" choose {
+        when "string-length($seed) > 0" > «$seed»_«@id»
+        otherwise value "@id";
+    }
     g{
         attrib "id" value "$seeded_id";
+        attrib "original" value "@id";
+
         choose {
             when "$target[self::svg:g]" {
                 foreach "@*[not(local-name() = $excluded_use_attrs/name | $merge_use_attrs)]"
@@ -112,7 +123,7 @@
                     }
 
                 apply "$target/*", mode="unlink_clone"{
-                    with "seed","concat($seed, @id)";
+                    with "seed","$seeded_id";
                 }
             }
             otherwise {
@@ -121,7 +132,7 @@
                     attrib "{name()}" > «.»
 
                 apply "$target", mode="unlink_clone"{
-                    with "seed","concat($seed, @id)";
+                    with "seed","$seeded_id";
                 }
             }
         }
@@ -133,13 +144,25 @@
 svgtmpl "@id", mode="unlink_clone" {
     param "seed";
     attrib "id" > «$seed»_«.»
+    attrib "original" > «.»
 }
 
 svgtmpl "@*", mode="unlink_clone" xsl:copy;
 
 svgtmpl "svg:use", mode="unlink_clone" {
     param "seed";
-    apply "." mode="inline_svg" with "seed","concat($seed, '_')";
+    const "targetid","substring-after(@xlink:href,'#')";
+    choose {
+        when "func:is_unlinkable($targetid, @id)" {
+            call "unlink_clone" {
+                with "targetid", "$targetid";
+                with "seed","$seed";
+            }
+        }
+        otherwise xsl:copy apply "@*", mode="unlink_clone" {
+            with "seed","$seed";
+        }
+    }
 }
 
 // copying widgets would have unwanted effect
diff -r 696301e869d5 -r 6ea4b7e1a9ed svghmi/svghmi.js
--- a/svghmi/svghmi.js	Wed Sep 16 09:42:26 2020 +0200
+++ b/svghmi/svghmi.js	Thu Sep 17 11:30:22 2020 +0200
@@ -240,7 +240,6 @@
 
 function send_hmi_value(index, value) {
     if(index > last_remote_index){
-        console.log("updated local variable ",index,value);
         updates[index] = value;
         requestHMIAnimation();
         return;
@@ -416,7 +415,6 @@
 function edit_value(path, valuetype, callback, initial, size) {
 
     let [keypadid, xcoord, ycoord] = keypads[valuetype];
-    console.log('XXX TODO : Edit value', path, valuetype, callback, initial, keypadid);
     edit_callback = callback;
     let widget = hmi_widgets[keypadid];
     widget.start_edit(path, valuetype, callback, initial, size);
@@ -461,7 +459,6 @@
     eltsub.inactive.setAttribute("style", "display:none");
     if(eltsub.active_style !== undefined)
             eltsub.active.setAttribute("style", eltsub.active_style);
-    console.log("active", eltsub);
 };
 function widget_inactive_activable(eltsub) {
     if(eltsub.active_style === undefined)
@@ -469,5 +466,4 @@
     eltsub.active.setAttribute("style", "display:none");
     if(eltsub.inactive_style !== undefined)
             eltsub.inactive.setAttribute("style", eltsub.inactive_style);
-    console.log("inactive", eltsub);
-};
+};
diff -r 696301e869d5 -r 6ea4b7e1a9ed svghmi/svghmi.py
--- a/svghmi/svghmi.py	Wed Sep 16 09:42:26 2020 +0200
+++ b/svghmi/svghmi.py	Thu Sep 17 11:30:22 2020 +0200
@@ -216,7 +216,8 @@
                 hmi_types_instances.pop(i)
                 break
 
-        assert(hmi_tree_root is not None)
+        if hmi_tree_root is None:
+            self.FatalError("SVGHMI : Library is selected but not used. Please either deselect it in project config or add a SVGHMI node to project.")
 
         # deduce HMI tree from PLC HMI_* instances
         for v in hmi_types_instances:
@@ -484,11 +485,18 @@
         InkscapeGeomColumns = ["Id", "x", "y", "w", "h"]
 
         inkpath = get_inkscape_path()
+
+        if inkpath is None:
+            self.FatalError("SVGHMI: inkscape is not installed.")
+
         svgpath = self._getSVGpath()
-        _status, result, _err_result = ProcessLogger(self.GetCTRoot().logger,
-                                                     inkpath + " -S " + svgpath,
+        status, result, _err_result = ProcessLogger(self.GetCTRoot().logger,
+                                                     '"' + inkpath + '" -S "' + svgpath + '"',
                                                      no_stdout=True,
                                                      no_stderr=True).spin()
+        if status != 0:
+            self.FatalError("SVGHMI: inkscape couldn't extract geometry from given SVG.")
+
         res = []
         for line in result.split():
             strippedline = line.strip()
diff -r 696301e869d5 -r 6ea4b7e1a9ed svghmi/widget_display.ysl2
--- a/svghmi/widget_display.ysl2	Wed Sep 16 09:42:26 2020 +0200
+++ b/svghmi/widget_display.ysl2	Thu Sep 17 11:30:22 2020 +0200
@@ -7,7 +7,6 @@
         frequency = 5;
         dispatch(value, oldval, index) {
             this.fields[index] = value;    
-            console.log(value, index);
             this.element.textContent = this.args.length == 1 ? vsprintf(this.args[0],this.fields) : this.fields.join(' ');
         }
     }
diff -r 696301e869d5 -r 6ea4b7e1a9ed svghmi/widget_dropdown.ysl2
--- a/svghmi/widget_dropdown.ysl2	Wed Sep 16 09:42:26 2020 +0200
+++ b/svghmi/widget_dropdown.ysl2	Thu Sep 17 11:30:22 2020 +0200
@@ -158,7 +158,6 @@
                 0, 
                 this.menu_offset - spanslength);
         }
-        console.log(this.menu_offset);
         this.set_partial_text();
     },
     // Setup partial view text content
diff -r 696301e869d5 -r 6ea4b7e1a9ed svghmi/widget_input.ysl2
--- a/svghmi/widget_input.ysl2	Wed Sep 16 09:42:26 2020 +0200
+++ b/svghmi/widget_input.ysl2	Thu Sep 17 11:30:22 2020 +0200
@@ -35,7 +35,7 @@
     |     },
     |     on_edit_click: function(opstr) {
     |         var size = (typeof this.key_pos_elt !== 'undefined') ?  this.key_pos_elt.getBBox() : undefined
-    |         edit_value("«path/@value»", "«path/@type»", this, this.last_val,size);
+    |         edit_value("«path/@value»", "«path/@type»", this, this.last_val, size);
     |     },
 
     |     edit_callback: function(new_val) {
diff -r 696301e869d5 -r 6ea4b7e1a9ed svghmi/widget_jsontable.ysl2
--- a/svghmi/widget_jsontable.ysl2	Wed Sep 16 09:42:26 2020 +0200
+++ b/svghmi/widget_jsontable.ysl2	Thu Sep 17 11:30:22 2020 +0200
@@ -3,32 +3,32 @@
 template "widget[@type='JsonTable']", mode="widget_class"
     ||
     class JsonTableWidget extends Widget{
-        do_http_request() {
+        cache = [];
+        do_http_request(...opt) {
             const query = {
-                 offset: '42',
-                 filter: '*powerloss*',
-                 args: this.args
+                args: this.args,
+                vars: this.cache,
+                visible: this.visible,
+                options: opt
             };
 
             const options = {
                  method: 'POST',
                  body: JSON.stringify(query),
                  headers: {'Content-Type': 'application/json'}
-            }
+            };
 
             fetch(this.args[0], options)
                 .then(res => res.json())
-                .then(this.spread_json_data);
-
-        }
-        dispatch(value) {
+                .then(this.spread_json_data.bind(this));
+
+        }
+        dispatch(value, oldval, index) {
+            this.cache[index] = value;
             this.do_http_request();
         }
-        on_click(evt) {
-            this.do_http_request();
-        }
-        init() {
-            this.element.setAttribute("onclick", "hmi_widgets['"+this.element_id+"'].on_click(evt)");
+        on_click(evt, ...options) {
+            this.do_http_request(...options);
         }
     }
     ||
@@ -41,44 +41,171 @@
 const "hmi_textstylelists_descs", "$parsed_widgets/widget[@type = 'TextStyleList']";
 const "hmi_textstylelists", "$hmi_elements[@id = $hmi_textstylelists_descs/@id]";
 
+const "textstylelist_related" foreach "$hmi_textstylelists" list {
+    attrib "listid" value "@id";
+    foreach "func:refered_elements(.)" elt {
+        attrib "eltid" value "@id";
+    }
+}
+const "textstylelist_related_ns", "exsl:node-set($textstylelist_related)";
+
+def "func:json_expressions" {
+    param "expressions";
+    param "label";
+
+    // compute javascript expressions to access JSON data
+    // desscribed in given svg element's "label"
+    // knowing that parent element already has given "expressions".
+
+    choose {
+        when "$label" {
+            const "suffixes", "str:split($label)";
+            const "res" foreach "$suffixes" expression {
+                const "suffix",".";
+                const "pos","position()";
+                // take last available expression (i.e can have more suffixes than expressions)
+                const "expr","$expressions[position() <= $pos][last()]/expression";
+                choose {
+                    when "contains($suffix,'=')" {
+                        const "name", "substring-before($suffix,'=')";
+                        if "$expr/@name[. != $name]"
+                            error > JsonTable : missplaced '=' or inconsistent names in Json data expressions.
+                        attrib "name" value "$name";
+                        attrib "content" > «$expr/@content»«substring-after($suffix,'=')»
+                    }
+                    otherwise {
+                        copy "$expr/@name";
+                        attrib "content" > «$expr/@content»«$suffix»
+                    }
+                }
+            }
+            result "exsl:node-set($res)";
+        }
+        // Empty labels are ignored, expressions are then passed as-is.
+        otherwise result "$expressions";
+    }
+
+}
+
+const "initexpr" expression attrib "content" > jdata
+const "initexpr_ns", "exsl:node-set($initexpr)";
+
 template "svg:use", mode="json_table_elt_render" {
-    param "value_expr";
+    param "expressions";
     // cloned element must be part of a HMI:List
     const "targetid", "substring-after(@xlink:href,'#')";
     const "from_list", "$hmi_lists[(@id | */@id) = $targetid]";
-    const "from_textstylelist", "$hmi_textstylelists[(@id | */@id) = $targetid]";
 
     choose {
         when "count($from_list) > 0" {
             |         id("«@id»").setAttribute("xlink:href", 
             // obtain new target id from HMI:List widget
-            |             "#"+hmi_widgets["«$from_list/@id»"].items[«$value_expr»]);
-        }
+            |             "#"+hmi_widgets["«$from_list/@id»"].items[«$expressions/expression[1]/@content»]);
+        }
+        otherwise
+            warning > Clones (svg:use) in JsonTable Widget must point to a valid HMI:List widget or item. Reference "«@xlink:href»" is not valid and will not be updated.
+    }
+}
+
+template "svg:text", mode="json_table_elt_render" {
+    param "expressions";
+    const "value_expr", "$expressions/expression[1]/@content";
+    const "original", "@original";
+    const "from_textstylelist", "$textstylelist_related_ns/list[elt/@eltid = $original]";
+    choose {
+
         when "count($from_textstylelist) > 0" {
-            |         console.log("from_textsylelist","«@id»", "«$value_expr»", «$value_expr»,
-            // obtain new style from HMI:TextStyleList widget
-            |             hmi_widgets["«$from_textstylelist/@id»"].items[«$value_expr»]);
-        }
-        otherwise
-            warning > Clones (svg:use) in JsonTable Widget must point to a valid HMI:List or HMI:TextStyleList widget or item. Reference "«@xlink:href»" is not valid and will not be updated.
-    }
-}
-
-template "svg:text", mode="json_table_elt_render" {
-    param "value_expr";
-    |         id("«@id»").textContent = String(«$value_expr»);
-}
+            const "content_expr", "$expressions/expression[2]/@content";
+            if "string-length($content_expr) = 0 or $expressions/expression[2]/@name != 'textContent'"
+                error > Clones (svg:use) in JsonTable Widget pointing to a HMI:TextStyleList widget or item must have a "textContent=.someVal" assignement following value expression in label.
+            |         {
+            |           let elt = id("«@id»");
+            |           elt.textContent = String(«$content_expr»);
+            |           elt.style = hmi_widgets["«$from_textstylelist/@listid»"].styles[«$value_expr»];
+            |         }
+        }
+        otherwise {
+            |         id("«@id»").textContent = String(«$value_expr»);
+        }
+    }
+}
+
+
+// only labels comming from Json widget are counted in
+def "func:filter_non_widget_label" {
+    param "elt";
+    param "widget_elts";
+    const "eltid" choose {
+        when "$elt/@original" value "$elt/@original";
+        otherwise value "$elt/@id";
+    }
+    result "$widget_elts[@id=$eltid]/@inkscape:label";
+}
+
+template "svg:*", mode="json_table_render_except_comments"{
+    param "expressions";
+    param "widget_elts";
+
+    const "label", "func:filter_non_widget_label(., $widget_elts)";
+    // filter out "# commented" elements
+    if "not(starts-with($label,'#'))" 
+        apply ".", mode="json_table_render"{
+            with "expressions", "$expressions";
+            with "widget_elts", "$widget_elts";
+            with "label", "$label";
+        }
+}
+
 
 template "svg:*", mode="json_table_render" {
-    param "objname";
-    apply ".", mode="json_table_elt_render" with "value_expr" > «$objname»«substring-before(@inkscape:label, ' ')»
+    param "expressions";
+    param "widget_elts";
+    param "label";
+
+    const "new_expressions", "func:json_expressions($expressions, $label)";
+
+    const "elt",".";
+    foreach "$new_expressions/expression[position() > 1][starts-with(@name,'onClick')]"
+    |         id("«$elt/@id»").setAttribute("onclick", "hmi_widgets['"+this.element_id+"'].on_click(evt, '«@name»', '"+«@content»+"')");
+
+    apply ".", mode="json_table_elt_render"
+        with "expressions", "$new_expressions";
 }
 
 template "svg:g", mode="json_table_render" {
-    param "objname";
-    |         let obj_«@id» = «$objname»«substring-before(@inkscape:label, ' ')»;
-    apply "*[@inkscape:label]", mode="json_table_render" 
-        with "objname" > obj_«@id»
+    param "expressions";
+    param "widget_elts";
+    param "label";
+    const "gid", "@id";
+
+    // use intermediate variables for optimization
+    const "varprefix" > obj_«$gid»_
+    |         try {
+
+    foreach "$expressions/expression"{
+    |          let «$varprefix»«position()» = «@content»;
+    |          if(«$varprefix»«position()» == undefined) {
+    |               console.log("«$varprefix»«position()» = «@content»");
+    |               throw null;
+    |          }
+    }
+
+    // because we put values in a variables, we can replace corresponding expression with variable name
+    const "new_expressions" foreach "$expressions/expression" xsl:copy {
+        copy "@name";
+        attrib "content" > «$varprefix»«position()»
+    }
+
+    // revert hiding in case it did happen before
+    |           id("«@id»").setAttribute("style", "«@style»");
+
+    apply "*", mode="json_table_render_except_comments" {
+        with "expressions", "func:json_expressions(exsl:node-set($new_expressions), $label)";
+        with "widget_elts", "$widget_elts";
+    }
+    |         } catch(err) {
+    |           id("«$gid»").setAttribute("style", "display:none");
+    |         }
 }
 
 template "widget[@type='JsonTable']", mode="widget_defs" {
@@ -86,7 +213,15 @@
     labels("data");
     optional_labels("forward backward cursor");
     const "data_elt", "$result_svg_ns//*[@id = $hmi_element/@id]/*[@inkscape:label = 'data']";
-    |     spread_json_data: function(jdata) {
-    apply "$data_elt/*", mode="json_table_render" with "objname","'jdata'";
+    |     visible: «count($data_elt/*[@inkscape:label])»,
+    |     spread_json_data: function(janswer) {
+    |         let [range,position,jdata] = janswer;
+    |         this.apply_hmi_value(1, range);
+    |         this.apply_hmi_value(2, position);
+    |         console.log(range,position,jdata);
+    apply "$data_elt", mode="json_table_render_except_comments" {
+        with "expressions","$initexpr_ns";
+        with "widget_elts","$hmi_element/*[@inkscape:label = 'data']/descendant::svg:*";
+    }
     |     }
 }
diff -r 696301e869d5 -r 6ea4b7e1a9ed svghmi/widget_keypad.ysl2
--- a/svghmi/widget_keypad.ysl2	Wed Sep 16 09:42:26 2020 +0200
+++ b/svghmi/widget_keypad.ysl2	Thu Sep 17 11:30:22 2020 +0200
@@ -104,9 +104,16 @@
          }
 
          on_Enter_click() {
-             end_modal.call(this);
-             let callback_obj = this.result_callback_obj;
-             callback_obj.edit_callback(this.editstr);
+             let coercedval = (typeof this.initial) == "number" ? Number(this.editstr) : this.editstr;
+             if(typeof coercedval == 'number' && isNaN(coercedval)){
+                 // revert to initial so it explicitely shows input was ignored
+                 this.editstr = String(this.initial);
+                 this.update();
+             } else { 
+                 let callback_obj = this.result_callback_obj;
+                 end_modal.call(this);
+                 callback_obj.edit_callback(coercedval);
+             }
          }
 
          on_BackSpace_click() {
@@ -153,11 +160,13 @@
          result_callback_obj = undefined;
          start_edit(info, valuetype, callback_obj, initial,size) {
              show_modal.call(this,size);
-             this.editstr = initial;
+             this.editstr = String(initial);
              this.result_callback_obj = callback_obj;
              this.Info_elt.textContent = info;
              this.shift = false;
              this.caps = false;
+             this.initial = initial;
+
              this.update();
          }
 
diff -r 696301e869d5 -r 6ea4b7e1a9ed svghmi/widget_list.ysl2
--- a/svghmi/widget_list.ysl2	Wed Sep 16 09:42:26 2020 +0200
+++ b/svghmi/widget_list.ysl2	Thu Sep 17 11:30:22 2020 +0200
@@ -1,10 +1,20 @@
 // widget_list.ysl2
 
-template "widget[@type='List' or @type='TextStyleList']", mode="widget_defs" {
+template "widget[@type='List']", mode="widget_defs" {
     param "hmi_element";
     |     items: {
     foreach "$hmi_element/*[@inkscape:label]" {
-    |         «func:escape_quotes(@inkscape:label)»: "«@id»",
+    |         «@inkscape:label»: "«@id»",
     }
     |     },
 }
+
+template "widget[@type='TextStyleList']", mode="widget_defs" {
+    param "hmi_element";
+    |     styles: {
+    foreach "$hmi_element/*[@inkscape:label]" {
+        const "style", "func:refered_elements(.)[self::svg:text]/@style";
+    |         «@inkscape:label»: "«$style»",
+    }
+    |     },
+}
diff -r 696301e869d5 -r 6ea4b7e1a9ed svghmi/widgets_common.ysl2
--- a/svghmi/widgets_common.ysl2	Wed Sep 16 09:42:26 2020 +0200
+++ b/svghmi/widgets_common.ysl2	Thu Sep 17 11:30:22 2020 +0200
@@ -29,8 +29,10 @@
         choose {
             when "not(@index)" {
                 choose {
-                    when "not(@type)" 
+                    when "not(@type)" {
                         warning > Widget «$widget/@type» id="«$eltid»" : No match for path "«@value»" in HMI tree
+                        > undefined`if "position()!=last()" > ,`
+                    }
                     when "@type = 'PAGE_LOCAL'" 
                         > "«@value»"`if "position()!=last()" > ,`
                     when "@type = 'HMI_LOCAL'" 
@@ -152,6 +154,7 @@
             if(!this.unsubscribable)
                 for(let i = 0; i < this.indexes.length; i++) {
                     let index = this.get_variable_index(i);
+                    if(index == undefined) continue;
                     subscribers(index).add(this);
                 }
             need_cache_apply.push(this); 
@@ -161,6 +164,7 @@
             if(!this.unsubscribable) for(let index in this.indexes){
                 /* dispatch current cache in newly opened page widgets */
                 let realindex = this.get_variable_index(index);
+                if(realindex == undefined) continue;
                 let cached_val = cache[realindex];
                 if(cached_val != undefined)
                     this._dispatch(cached_val, cached_val, index);
@@ -178,18 +182,23 @@
             }
             return index;
         }
-        change_hmi_value(index,opstr) {
-            return change_hmi_value(this.get_variable_index(index), opstr);
+        change_hmi_value(index, opstr) {
+            let realindex = this.get_variable_index(index);
+            if(realindex == undefined) return undefined;
+            return change_hmi_value(realindex, opstr);
         }
 
         apply_hmi_value(index, new_val) {
-            return apply_hmi_value(this.get_variable_index(0), new_val);
+            let realindex = this.get_variable_index(index);
+            if(realindex == undefined) return undefined;
+            return apply_hmi_value(realindex, new_val);
         }
 
         new_hmi_value(index, value, oldval) {
             // TODO avoid searching, store index at sub()
             for(let i = 0; i < this.indexes.length; i++) {
                 let refindex = this.get_variable_index(i);
+                if(refindex == undefined) continue;
 
                 if(index == refindex) {
                     this._dispatch(value, oldval, i);
diff -r 696301e869d5 -r 6ea4b7e1a9ed tests/svghmi/py_ext_0@py_ext/pyfile.xml
--- a/tests/svghmi/py_ext_0@py_ext/pyfile.xml	Wed Sep 16 09:42:26 2020 +0200
+++ b/tests/svghmi/py_ext_0@py_ext/pyfile.xml	Thu Sep 17 11:30:22 2020 +0200
@@ -1,33 +1,69 @@
 <?xml version='1.0' encoding='utf-8'?>
 <PyFile xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <variables>
-    <variable name="SomePLCglobal" type="HMI_STRING" onchange="MyOnChangeFunc"/>
-    <variable name="AlarmCount" type="HMI_INT"/>
+    <variable name="AlarmNotify" type="HMI_INT"/>
+    <variable name="SendAlarm" type="HMI_INT" onchange="TriggerAlarm"/>
+    <variable name="AlarmText" type="HMI_STRING" initial="'POS'"/>
+    <variable name="AlarmStatus" type="HMI_STRING" initial="'alarm'"/>
   </variables>
   <globals>
     <xhtml:p><![CDATA[
 from twisted.web.resource import Resource
-import json
+import json, time, random, collections
+
+Alarms = []
+AlarmIndex = {}
+lastid = 0
+
+def TriggerAlarm(changed_var_name):
+    global Alarms, lastid
+    new_entry = [time.time(), PLCGlobals.AlarmText, PLCGlobals.AlarmStatus, lastid]
+    Alarms.append(new_entry)
+    AlarmIndex[lastid] = new_entry
+    lastid = lastid + 1
+    PLCGlobals.AlarmNotify = random.randint(0, 4294967296)
 
 class AlarmJsonResource(Resource):
     def render_GET(self, request):
         return ''
 
     def render_POST(self, request):
-        print(request.__dict__)
-        newdata = request.content.getvalue()
-        print newdata
-        selected_alarms = [
-            {"name":"three", "sides":3},
-            {"name":"four", "sides":4},
-            {"name":"five", "sides":5},
-            {"name":"six", "sides":6},
-        ]
-        return json.dumps(selected_alarms)
+        newstr = request.content.getvalue()
+        newdata = json.loads(newstr)
+        vars = newdata[u'vars']
+        args = newdata[u'args']
+        visible = newdata[u'visible']
+        options = newdata[u'options']
 
+        if len(options) == 2 :
+            action, alarmid = options
+            if action == "onClick[acknowledge]":
+                AlarmIndex[int(alarmid)][2] = "ack"
 
-def MyOnChangeFunc(changed_var_name):
-    print changed_var_name + ": " + getattr(PLCGlobals, changed_var_name)
+        svars = (vars + [0,0])[:3]
+        range_feedback = svars[1]
+        slider_position = svars[2]
+        answer = self.renderTable(range_feedback, slider_position, visible, *(args+svars[3:]))
+        janswer = json.dumps(answer)
+        return janswer
+
+    def renderTable(self, old_range, old_position, visible, *options):
+        new_range = len(Alarms)
+        delta = new_range - visible
+        new_position = 0 if delta <= 0 else delta if old_position > delta else old_position
+        new_visible = new_range if delta <= 0 else visible
+        
+        visible_alarms = []
+        for ts, text, status, alarmid in Alarms[new_position:new_position + new_visible]:
+            visible_alarms.append({
+                "time": time.ctime(ts),
+                "text": text, # TODO translate text
+                "status": status,
+                "alarmid": alarmid
+            })
+
+        return new_range, new_position, visible_alarms
+
 
 ]]></xhtml:p>
   </globals>
diff -r 696301e869d5 -r 6ea4b7e1a9ed tests/svghmi/svghmi_0@svghmi/svghmi.svg
--- a/tests/svghmi/svghmi_0@svghmi/svghmi.svg	Wed Sep 16 09:42:26 2020 +0200
+++ b/tests/svghmi/svghmi_0@svghmi/svghmi.svg	Thu Sep 17 11:30:22 2020 +0200
@@ -16,7 +16,7 @@
    version="1.1"
    id="hmi0"
    sodipodi:docname="svghmi.svg"
-   inkscape:version="0.92.5 (2060ec1f9f, 2020-04-08)">
+   inkscape:version="0.92.3 (2405546, 2018-03-11)">
   <metadata
      id="metadata4542">
     <rdf:RDF>
@@ -34,6 +34,21 @@
     <marker
        inkscape:isstock="true"
        style="overflow:visible"
+       id="marker1971"
+       refX="0"
+       refY="0"
+       orient="auto"
+       inkscape:stockid="Arrow2Lend">
+      <path
+         transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
+         d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
+         style="fill:#ff3000;fill-opacity:1;fill-rule:evenodd;stroke:#ff3000;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
+         id="path1969"
+         inkscape:connector-curvature="0" />
+    </marker>
+    <marker
+       inkscape:isstock="true"
+       style="overflow:visible"
        id="marker1536"
        refX="0"
        refY="0"
@@ -42,7 +57,7 @@
       <path
          transform="matrix(-1.1,0,0,-1.1,-1.1,0)"
          d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z"
-         style="fill:#c130f7;fill-opacity:1;fill-rule:evenodd;stroke:#c130f7;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
+         style="fill:#ff0000;fill-opacity:1;fill-rule:evenodd;stroke:#ff0000;stroke-width:0.625;stroke-linejoin:round;stroke-opacity:1"
          id="path1534"
          inkscape:connector-curvature="0" />
     </marker>
@@ -182,17 +197,17 @@
      inkscape:pageopacity="0"
      inkscape:pageshadow="2"
      inkscape:document-units="px"
-     inkscape:current-layer="g907"
+     inkscape:current-layer="g1384"
      showgrid="false"
      units="px"
-     inkscape:zoom="0.50000001"
-     inkscape:cx="632.83299"
-     inkscape:cy="-317.59408"
-     inkscape:window-width="2443"
-     inkscape:window-height="1567"
-     inkscape:window-x="816"
-     inkscape:window-y="103"
-     inkscape:window-maximized="0"
+     inkscape:zoom="1.0913159"
+     inkscape:cx="-911.00114"
+     inkscape:cy="181.96708"
+     inkscape:window-width="1800"
+     inkscape:window-height="836"
+     inkscape:window-x="0"
+     inkscape:window-y="27"
+     inkscape:window-maximized="1"
      showguides="true"
      inkscape:guide-bbox="true" />
   <rect
@@ -1492,7 +1507,7 @@
      transform="matrix(3.3549332,0,0,3.14525,-181.87457,1556.0198)"
      style="fill-rule:evenodd;stroke-width:0.47631353"
      id="g4278"
-     inkscape:label="HMI:Keypad:HMI_STRING">
+     inkscape:label="HMI:Keypad:HMI_STRING:HMI_LOCAL:PAGE_LOCAL">
     <path
        style="color:#000000;clip-rule:nonzero;display:inline;overflow:visible;visibility:visible;opacity:0.6;isolation:auto;mix-blend-mode:normal;color-interpolation:sRGB;color-interpolation-filters:linearRGB;solid-color:#000000;solid-opacity:1;vector-effect:none;fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:0.16776976;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker:none;color-rendering:auto;image-rendering:auto;shape-rendering:auto;text-rendering:auto;enable-background:accumulate"
        d="M 54.211084,1.2654702 H 435.7388 V 230.18209 H 54.211084 Z"
@@ -2639,443 +2654,6 @@
     </g>
   </g>
   <g
-     transform="matrix(0.28590269,0,0,0.28590269,-13.279646,425.80032)"
-     id="g208-1-3"
-     inkscape:label="HMI:Input@/SOMEPLCGLOBAL"
-     style="stroke-width:2">
-    <text
-       inkscape:label="value"
-       id="text164-6"
-       y="218.24219"
-       x="136.32812"
-       style="font-style:normal;font-weight:normal;font-size:160px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#ffffff;fill-opacity:1;stroke:none;stroke-width:2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
-       xml:space="preserve"><tspan
-         style="stroke-width:2px"
-         y="218.24219"
-         x="136.32812"
-         id="tspan162-7"
-         sodipodi:role="line">8888</tspan></text>
-    <rect
-       style="color:#000000;clip-rule:nonzero;display:inline;overflow:visible;visibility:visible;opacity:0;isolation:auto;mix-blend-mode:normal;color-interpolation:sRGB;color-interpolation-filters:linearRGB;solid-color:#000000;solid-opacity:1;vector-effect:none;fill:#ff00ff;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:10;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;marker:none;color-rendering:auto;image-rendering:auto;shape-rendering:auto;text-rendering:auto;enable-background:accumulate"
-       id="rect166-5"
-       width="407.7037"
-       height="128"
-       x="139.85185"
-       y="95.40741"
-       onclick=""
-       inkscape:label="edit" />
-    <g
-       transform="translate(-416.52022,170.47452)"
-       inkscape:label="+&quot;dhu&quot;"
-       id="g174-3"
-       style="stroke-width:2">
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-      <text
-         xml:space="preserve"
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diff -r 696301e869d5 -r 6ea4b7e1a9ed tests/svghmi_v2/svghmi_0@svghmi/svghmi.svg
--- a/tests/svghmi_v2/svghmi_0@svghmi/svghmi.svg	Wed Sep 16 09:42:26 2020 +0200
+++ b/tests/svghmi_v2/svghmi_0@svghmi/svghmi.svg	Thu Sep 17 11:30:22 2020 +0200
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