added ability to add general message listeners for "any" message

HISTORY.md

@@ -16,6 +16,9 @@
     * NEW Slovak translation, thanks, Peter Lukacovic
     * German
 
+### 2019-12-16
+* gui, objects: added ability to add general message listeners for "any" message
+
 ### 2019-12-15
 * gui, threads:  new Snap! API: programmatically broadcast messages and optionally wait from outside Snap!
 * gui: added global variable access methods to the new Snap! API

snap.html

@@ -8,8 +8,8 @@
         <script type="text/javascript" src="src/widgets.js?version=2019-10-16"></script>
         <script type="text/javascript" src="src/blocks.js?version=2019-12-13"></script>
         <script type="text/javascript" src="src/threads.js?version=2019-12-15"></script>
-        <script type="text/javascript" src="src/objects.js?version=2019-12-15"></script>
-        <script type="text/javascript" src="src/gui.js?version=2019-12-15"></script>
+        <script type="text/javascript" src="src/objects.js?version=2019-12-16"></script>
+        <script type="text/javascript" src="src/gui.js?version=2019-12-16"></script>
         <script type="text/javascript" src="src/paint.js?version=2019-06-27"></script>
         <script type="text/javascript" src="src/lists.js?version=2019-12-08"></script>
         <script type="text/javascript" src="src/byob.js?version=2019-07-12"></script>

src/gui.js

@@ -79,7 +79,7 @@ BlockEditorMorph, BlockDialogMorph*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2019-December-15';
+modules.gui = '2019-December-16';
 
 // Declarations
 
@@ -6102,6 +6102,9 @@ IDE_Morph.prototype.broadcast = function(message, callback) {
             ));
         });
     });
+    (this.stage.messageCallbacks[''] || []).forEach(function (callback) {
+        callback(message);
+    });
     (this.stage.messageCallbacks[message] || []).forEach(function (callback) {
         callback();
     });
@@ -6111,9 +6114,15 @@ IDE_Morph.prototype.addMessageListener = function (message, callback) {
     // associate a callback function with a broadcast message,
     // whenever the message is broadcast, the callback is executed,
     // you can add multiple callbacks to a message, they will be
-    // executed in the order you added them
+    // executed in the order you added them.
+    // Note: Only passing a callback or associating a callback with
+    // an empty string attaches the callback to "any" message, taking
+    // the actual message as argument
     var funcs;
-    if (!isString(message)) {
+    if (message instanceof Function && isNil(callback)) {
+        callback = message;
+        message = '';
+    } else if (!isString(message)) {
         throw new Error('message must be a String');
     }
     funcs = this.stage.messageCallbacks[message];

src/threads.js

@@ -61,7 +61,7 @@ StageMorph, SpriteMorph, StagePrompterMorph, Note, modules, isString, copy,
 isNil, WatcherMorph, List, ListWatcherMorph, alert, console, TableMorph, Color,
 TableFrameMorph, ColorSlotMorph, isSnapObject, newCanvas, Symbol, SVG_Costume*/
 
-modules.threads = '2019-December-15';
+modules.threads = '2019-December-16';
 
 var ThreadManager;
 var Process;
@@ -3180,8 +3180,11 @@ Process.prototype.doBroadcast = function (message) {
                 });
             }
         });
+        (stage.messageCallbacks[''] || []).forEach(function (callback) {
+            callback(msg); // for "any" message, pass it along as argument
+        });
         (stage.messageCallbacks[msg] || []).forEach(function (callback) {
-            callback();
+            callback(); // for a particular message
         });
     }
     return procs;