1. Implement 'nocache' option for JSROOT scripts lodaing.

When specified in URL with JSRootCore.js script, tries to avoid scripts caching problem by
adding stamp parameter to all URLs.

Author: linev

changes.md

@@ -1,12 +1,17 @@
 # JSROOT changelog
 
+## Changes in 5.5.1
+1. Implement 'nocache' option for JSROOT scripts lodaing. When specified in URL with
+   JSRootCore.js script, tries to avoid scripts caching problem by adding stamp parameter to all URLs.
+
+
 ## Changes in 5.5.0
-1. Introduce JSROOT.StoreJSON() function. It creates JSON code for the 
+1. Introduce JSROOT.StoreJSON() function. It creates JSON code for the
    TCanvas with all drawn objects inside. Allows to store current canvas state
 2. Support "item=img:file.png" parameter to insert images in existing layout (#151)
 3. Support TTree drawing into TGraph (#153), thanks @cozzyd
 4. Let configure "&toolbar=right" in URL to change position of tool buttons
-5. Let configure "&divsize=500x400" in URL of size of main div element (default - full browser)  
+5. Let configure "&divsize=500x400" in URL of size of main div element (default - full browser)
 6. Implement "optstat1001" and "optfit101" draw options for histograms
 7. Remove "autocol" options - standard "plc" should be used instead
 8. Provide drawing of artificial "$legend" item - it creates TLegend for all primitives in pad

scripts/JSRootCore.js

@@ -96,12 +96,13 @@
 
    "use strict";
 
-   JSROOT.version = "5.5.0 6/07/2018";
+   JSROOT.version = "5.5.1 16/07/2018";
 
    JSROOT.source_dir = "";
    JSROOT.source_min = false;
    JSROOT.source_fullpath = ""; // full name of source script
    JSROOT.bower_dir = null; // when specified, use standard libs from bower location
+   JSROOT.nocache = false;
    JSROOT.sources = ['core']; // indicates which major sources were loaded
 
    JSROOT.id_counter = 0;
@@ -965,16 +966,14 @@
          isrootjs = true;
          filename = filename.slice(3);
          if (JSROOT.use_full_libs) filename = "libs/" + filename.slice(8, filename.length-7) + ".js";
-      } else
-      if (filename.indexOf("$$$")===0) {
+      } else if (filename.indexOf("$$$")===0) {
          isrootjs = true;
          filename = filename.slice(3);
          if ((filename.indexOf("style/")==0) && JSROOT.source_min &&
              (filename.lastIndexOf('.css')==filename.length-4) &&
              (filename.indexOf('.min.css')<0))
             filename = filename.slice(0, filename.length-4) + '.min.css';
-      } else
-      if (filename.indexOf("###")===0) {
+      } else if (filename.indexOf("###")===0) {
          isbower = true;
          filename = filename.slice(3);
       }
@@ -1020,6 +1019,9 @@
       else
          JSROOT.progress("loading " + filename + " ...");
 
+      if (JSROOT.nocache && isrootjs && (filename.indexOf("?")<0))
+         filename += "?stamp=" + JSROOT.nocache;
+
       if (isstyle) {
          element = document.createElement("link");
          element.setAttribute("rel", "stylesheet");
@@ -2218,6 +2220,8 @@
 
       var src = JSROOT.source_fullpath;
 
+      if (JSROOT.GetUrlOption('nocache', src)!=null) JSROOT.nocache = (new Date).getTime(); // use timestamp to overcome cache limitation
+
       if (JSROOT.GetUrlOption('gui', src) !== null)
          return window_on_load( function() { JSROOT.BuildSimpleGUI(); } );