Merge branch 'master' of git://github.com/jmoenig/Snap--Build-Your-Own-Blocks into shared-url

* 'master' of git://github.com/jmoenig/Snap--Build-Your-Own-Blocks: (34 commits)
  tail-call-elimination for reporters - experiment
  allow recursive reporters to be stopped by user
  updated history
  fixed #131
  Fixed #34
  Fixed #644
  Fixed #372
  Fixed #416
  Fixed #318
  Fix “stop this block” primitive for tail-call-elimination
  Fix "stop this block"’s lexical awareness
  Add a new Favicon to Snap! (Clearer Lambda)
  integrate translation update
  push morphic.js version date
  fix ‘line’ option in ‘split’ block for Windows files
  integrate percent sign fix for JSLint
  Updated the “About” Dialog
  renamed Process::callback to "onComplete"
  Fixed #364 avoid “freezing” when calling LAUNCH on empty ring
  Fixed #642, avoid “freezing” when calling CONS on non-list/null
  ...

13 files changed, 374 insertions, 213 deletions

diff --git a/blocks.js b/blocks.js
index 73ef884..e56d0ed 100644
--- a/blocks.js
+++ b/blocks.js
@@ -155,7 +155,7 @@ DialogBoxMorph, BlockInputFragmentMorph, PrototypeHatBlockMorph, Costume*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.blocks = '2014-October-01';
+modules.blocks = '2014-November-21';
 
 
 var SyntaxElementMorph;
@@ -394,10 +394,10 @@ SyntaxElementMorph.prototype.allInputs = function () {
 };
 
 SyntaxElementMorph.prototype.allEmptySlots = function () {
-/*
-    answer empty input slots of all children excluding myself,
-    but omit those in nested rings (lambdas) and JS-Function primitives
-*/
+    // answer empty input slots of all children excluding myself,
+    // but omit those in nested rings (lambdas) and JS-Function primitives.
+    // Used by the evaluator when binding implicit formal parameters
+    // to empty input slots
     var empty = [];
     if (!(this instanceof RingMorph) &&
             (this.selector !== 'reportJSFunction')) {
@@ -412,6 +412,26 @@ SyntaxElementMorph.prototype.allEmptySlots = function () {
     return empty;
 };
 
+SyntaxElementMorph.prototype.tagExitBlocks = function (stopTag, isCommand) {
+    // tag 'report' and 'stop this block' blocks of all children including
+    // myself, with either a stopTag (for "stop" blocks) or an indicator of
+    // being inside a command block definition, but omit those in nested
+    // rings (lambdas. Used by the evaluator when entering a procedure
+    if (this.selector === 'doReport') {
+        this.partOfCustomCommand = isCommand;
+    } else if (this.selector === 'doStopThis') {
+        this.exitTag = stopTag;
+    } else {
+        if (!(this instanceof RingMorph)) {
+            this.children.forEach(function (morph) {
+                if (morph.tagExitBlocks) {
+                    morph.tagExitBlocks(stopTag, isCommand);
+                }
+            });
+        }
+    }
+};
+
 SyntaxElementMorph.prototype.replaceInput = function (oldArg, newArg) {
     var scripts = this.parentThatIsA(ScriptsMorph),
         replacement = newArg,
@@ -3169,9 +3189,14 @@ BlockMorph.prototype.snap = function () {
     I inherit from BlockMorph adding the following most important
     public accessors:
 
-    nextBlock()        - set / get the block attached to my bottom
-    bottomBlock()    - answer the bottom block of my stack
-    blockSequence()    - answer an array of blocks starting with myself
+        nextBlock()       - set / get the block attached to my bottom
+        bottomBlock()     - answer the bottom block of my stack
+        blockSequence()   - answer an array of blocks starting with myself
+
+    and the following "lexical awareness" indicators:
+
+        partOfCustomCommand - temporary bool set by the evaluator
+        exitTag           - temporary string or number set by the evaluator
 */
 
 // CommandBlockMorph inherits from BlockMorph:
@@ -3189,6 +3214,8 @@ function CommandBlockMorph() {
 CommandBlockMorph.prototype.init = function () {
     CommandBlockMorph.uber.init.call(this);
     this.setExtent(new Point(200, 100));
+    this.partOfCustomCommand = false;
+    this.exitTag = null;
 };
 
 // CommandBlockMorph enumerating:
diff --git a/byob.js b/byob.js
index 1277bb6..b5905ce 100644
--- a/byob.js
+++ b/byob.js
@@ -106,7 +106,7 @@ SymbolMorph, isNil*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.byob = '2014-September-30';
+modules.byob = '2014-November-20';
 
 // Declarations
 
@@ -688,7 +688,8 @@ CustomCommandBlockMorph.prototype.labelPart = function (spec) {
         return CustomCommandBlockMorph.uber.labelPart.call(this, spec);
     }
     if ((spec[0] === '%') && (spec.length > 1)) {
-        part = new BlockInputFragmentMorph(spec.slice(1));
+        // part = new BlockInputFragmentMorph(spec.slice(1));
+        part = new BlockInputFragmentMorph(spec.replace(/%/g, ''));
     } else {
         part = new BlockLabelFragmentMorph(spec);
         part.fontSize = this.fontSize;
diff --git a/favicon.ico b/favicon.ico
new file mode 100644
index 0000000..46a1369
--- /dev/null
+++ b/favicon.ico
diff --git a/gui.js b/gui.js
index 6052953..f53d597 100644
--- a/gui.js
+++ b/gui.js
@@ -69,7 +69,7 @@ SpeechBubbleMorph*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2014-October-06';
+modules.gui = '2014-November-20';
 
 // Declarations
 
@@ -190,7 +190,7 @@ IDE_Morph.prototype.init = function (isAutoFill) {
 
     // additional properties:
     this.cloudMsg = null;
-    this.source = 'local';
+    this.source = SnapCloud.username ? 'cloud' : 'local';
     this.serializer = new SnapSerializer();
 
     this.globalVariables = new VariableFrame();
@@ -2511,8 +2511,9 @@ IDE_Morph.prototype.aboutSnap = function () {
         + 'jens@moenig.org, bh@cs.berkeley.edu\n\n'
 
         + 'Snap! is developed by the University of California, Berkeley\n'
-        + '          with support from the National Science Foundation '
-        + 'and MioSoft.   \n'
+        + '          with support from the National Science Foundation, '
+        + 'MioSoft,     \n'
+        + 'and the Communications Design Group at SAP Labs. \n'
 
         + 'The design of Snap! is influenced and inspired by Scratch,\n'
         + 'from the Lifelong Kindergarten group at the MIT Media Lab\n\n'
diff --git a/history.txt b/history.txt
index 28116b9..964686e 100755
--- a/history.txt
+++ b/history.txt
@@ -2309,3 +2309,47 @@ ______
 141008
 ------
 * Objects: fixed #608, #610
+
+141106
+------
+* Morphic: Enable mouseMove events with right button pressed
+
+141114
+------
+* Threads, Store: Fix reporting out of nested custom C-shaped blocks
+
+141117
+------
+* Threads, Blocks: Treat REPORT blocks inside custom command definitions as STOP THIS BLOCK / IGNORE INPUTS
+
+141120
+------
+* Lists: Fixed #642 avoid “freezing” when calling CONS on non-list/null
+* Threads: Fixed #364 avoid “freezing” when calling LAUNCH on empty ring
+* Threads: Added optional “onComplete” callback to Process, thanks, @bromagosa!
+* GUI: Set Default Save location to Cloud on load, thanks, @cycomachead!
+* GUI: Updated the “About” Dialog with a mention of support from CDG (SAP Labs)
+* BYOB: Percent sign fix for block labels, thanks, @natashasandy!
+* Threads: fix ‘line’ option in ‘split’ block for Windows files, thanks, @brianharvey!
+* Morphic: fix slider range 1, thanks, @tonychenr !
+* translation update, thanks, Manuel!
+
+141121
+------
+* Threads, Blocks: Fix STOP THIS BLOCK’s lexical awareness
+
+1411213
+-------
+* Threads: Fix “stop this block” primitive for tail-call-elimination
+
+1411214
+-------
+* Threads: Fixed #318
+* Objects: Fixed #416
+* Objects: Fixed #372
+* Threads: Fixed #644
+* Store: Fixed #34
+* Threads: Fixed #131
+* snap.html, favicon.ico: new Favicon, thanks, Michael!
+* Threads: improved whitespace detection for “split” primitive, thanks, Michael!
+* Threads: tail-call-elimination for reporters experiment (commented out, under construction)
diff --git a/lang-pt.js b/lang-pt.js
index cd3b5fe..2d3804a 100755
--- a/lang-pt.js
+++ b/lang-pt.js
@@ -650,11 +650,12 @@ SnapTranslator.dict.pt = {
     'Save As...':
         'Guardar este projecto como…',
     'Import...':
-        'Importar para este projecto…',
+        'Importar…',
     'file menu import hint':
-        'Importar para este projecto\num projecto exportado,\n'
-            + 'uma biblioteca de blocos,\n'
-            + 'um traje ou um som.',
+        'Abrir um projecto exportado,\n'
+            + 'substitundo o projecto corrente, ou\n'
+            + 'importar uma biblioteca de blocos, um\n'
+            + 'traje ou um som para o projecto corrente.',
     'Export project as plain text...':
         'Exportar este projecto como texto simples…',
     'Export project...':
@@ -1616,7 +1617,7 @@ SnapTranslator.dict.pt = {
     'unshared.':
         'deixado de partilhar.',
     'Unshare':
-        'Deixar de Partilhar',
+        'Não Partilhar',
     'password has been changed.':
         'a sua palavra-passe foi alterada.',
     'SVG costumes are\nnot yet fully supported\nin every browser':
@@ -1641,6 +1642,18 @@ SnapTranslator.dict.pt = {
         'Seleccionar um traje da biblioteca de média.',
     'edit rotation point only...':
         'editar apenas ponto de rotação…',
+    'Export Project As...':
+        'Exportar Projecto Como…',
+    'a variable of name \'':
+        'não existe uma variável «',
+    '\'\ndoes not exist in this context':
+        '»\nneste contexto',
+    '(temporary)':
+        '(temporária)',
+    'expecting':
+        'esperavam-se',
+    'input(s), but getting':
+        'argumento(s), mas foram passados',
 
     // produção de código
     'map %cmdRing to %codeKind %code':
diff --git a/lists.js b/lists.js
index a4aff6c..bd856fe 100644
--- a/lists.js
+++ b/lists.js
@@ -61,7 +61,7 @@ PushButtonMorph, SyntaxElementMorph, Color, Point, WatcherMorph,
 StringMorph, SpriteMorph, ScrollFrameMorph, CellMorph, ArrowMorph,
 MenuMorph, snapEquals, Morph, isNil, localize, MorphicPreferences*/
 
-modules.lists = '2014-July-28';
+modules.lists = '2014-November-20';
 
 var List;
 var ListWatcherMorph;
@@ -125,6 +125,9 @@ List.prototype.changed = function () {
 
 List.prototype.cons = function (car, cdr) {
     var answer = new List();
+    if (!(cdr instanceof List || isNil(cdr))) {
+        throw new Error("cdr isn't a list: " + cdr);
+    }
     answer.first = isNil(car) ? null : car;
     answer.rest = cdr || null;
     answer.isLinked = true;
diff --git a/morphic.js b/morphic.js
index 4e18482..763a196 100644
--- a/morphic.js
+++ b/morphic.js
@@ -464,9 +464,15 @@
 
         MyMorph.prototype.mouseMove = function(pos) {};
 
-    The only optional parameter of such a method is a Point object
+    All of these methods have as optional parameter a Point object
     indicating the current position of the Hand inside the World's
-    coordinate system.
+    coordinate system. The
+
+        mouseMove(pos, button)
+
+    event method has an additional optional parameter indicating the
+    currently pressed mouse button, which is either 'left' or 'right'.
+    You can use this to let users interact with 3D environments.
 
     Events may be "bubbled" up a morph's owner chain by calling
 
@@ -1035,7 +1041,7 @@
 /*global window, HTMLCanvasElement, getMinimumFontHeight, FileReader, Audio,
 FileList, getBlurredShadowSupport*/
 
-var morphicVersion = '2014-September-30';
+var morphicVersion = '2014-November-20';
 var modules = {}; // keep track of additional loaded modules
 var useBlurredShadows = getBlurredShadowSupport(); // check for Chrome-bug
 
@@ -5754,7 +5760,7 @@ SliderMorph.prototype.rangeSize = function () {
 };
 
 SliderMorph.prototype.ratio = function () {
-    return this.size / this.rangeSize();
+    return this.size / (this.rangeSize() + 1);
 };
 
 SliderMorph.prototype.unitSize = function () {
@@ -9346,11 +9352,11 @@ HandMorph.prototype.init = function (aWorld) {
     this.world = aWorld;
     this.mouseButton = null;
     this.mouseOverList = [];
-    this.mouseDownMorph = null;
     this.morphToGrab = null;
     this.grabOrigin = null;
     this.temporaries = [];
     this.touchHoldTimeout = null;
+    this.contextMenuEnabled = false;
 };
 
 HandMorph.prototype.changed = function () {
@@ -9494,9 +9500,10 @@ HandMorph.prototype.drop = function () {
 */
 
 HandMorph.prototype.processMouseDown = function (event) {
-    var morph, expectedClick, actualClick;
+    var morph, actualClick;
 
     this.destroyTemporaries();
+    this.contextMenuEnabled = true;
     this.morphToGrab = null;
     if (this.children.length !== 0) {
         this.drop();
@@ -9529,15 +9536,9 @@ HandMorph.prototype.processMouseDown = function (event) {
         if (event.button === 2 || event.ctrlKey) {
             this.mouseButton = 'right';
             actualClick = 'mouseDownRight';
-            expectedClick = 'mouseClickRight';
         } else {
             this.mouseButton = 'left';
             actualClick = 'mouseDownLeft';
-            expectedClick = 'mouseClickLeft';
-        }
-        this.mouseDownMorph = morph;
-        while (!this.mouseDownMorph[expectedClick]) {
-            this.mouseDownMorph = this.mouseDownMorph.parent;
         }
         while (!morph[actualClick]) {
             morph = morph.parent;
@@ -9596,7 +9597,7 @@ HandMorph.prototype.processMouseUp = function () {
             expectedClick = 'mouseClickLeft';
         } else {
             expectedClick = 'mouseClickRight';
-            if (this.mouseButton) {
+            if (this.mouseButton && this.contextMenuEnabled) {
                 context = morph;
                 contextMenu = context.contextMenu();
                 while ((!contextMenu) &&
@@ -9654,16 +9655,18 @@ HandMorph.prototype.processMouseMove = function (event) {
     // mouseOverNew = this.allMorphsAtPointer();
     mouseOverNew = this.morphAtPointer().allParents();
 
-    if ((this.children.length === 0) &&
-            (this.mouseButton === 'left')) {
+    if (!this.children.length && this.mouseButton) {
         topMorph = this.morphAtPointer();
         morph = topMorph.rootForGrab();
         if (topMorph.mouseMove) {
-            topMorph.mouseMove(pos);
+            topMorph.mouseMove(pos, this.mouseButton);
+            if (this.mouseButton === 'right') {
+                this.contextMenuEnabled = false;
+            }
         }
 
         // if a morph is marked for grabbing, just grab it
-        if (this.morphToGrab) {
+        if (this.mouseButton === 'left' && this.morphToGrab) {
             if (this.morphToGrab.isDraggable) {
                 morph = this.morphToGrab;
                 this.grab(morph);
diff --git a/objects.js b/objects.js
index 4be213a..69376c8 100644
--- a/objects.js
+++ b/objects.js
@@ -125,7 +125,7 @@ PrototypeHatBlockMorph*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.objects = '2014-October-08';
+modules.objects = '2014-November-24';
 
 var SpriteMorph;
 var StageMorph;
@@ -1674,6 +1674,20 @@ SpriteMorph.prototype.blockTemplates = function (category) {
         return menu;
     }
 
+    function addVar(pair) {
+        if (pair) {
+            if (myself.variables.silentFind(pair[0])) {
+                myself.inform('that name is already in use');
+            } else {
+                myself.addVariable(pair[0], pair[1]);
+                myself.toggleVariableWatcher(pair[0], pair[1]);
+                myself.blocksCache[cat] = null;
+                myself.paletteCache[cat] = null;
+                myself.parentThatIsA(IDE_Morph).refreshPalette();
+            }
+        }
+    }
+
     if (cat === 'motion') {
 
         blocks.push(block('forward'));
@@ -1967,15 +1981,7 @@ SpriteMorph.prototype.blockTemplates = function (category) {
             function () {
                 new VariableDialogMorph(
                     null,
-                    function (pair) {
-                        if (pair && !myself.variables.silentFind(pair[0])) {
-                            myself.addVariable(pair[0], pair[1]);
-                            myself.toggleVariableWatcher(pair[0], pair[1]);
-                            myself.blocksCache[cat] = null;
-                            myself.paletteCache[cat] = null;
-                            myself.parentThatIsA(IDE_Morph).refreshPalette();
-                        }
-                    },
+                    addVar,
                     myself
                 ).prompt(
                     'Variable name',
@@ -2164,8 +2170,8 @@ SpriteMorph.prototype.freshPalette = function (category) {
             var defs = SpriteMorph.prototype.blocks,
                 hiddens = StageMorph.prototype.hiddenPrimitives;
             return Object.keys(hiddens).some(function (any) {
-                return defs[any].category === category ||
-                    contains((more[category] || []), any);
+                return !isNil(defs[any]) && (defs[any].category === category
+                    || contains((more[category] || []), any));
             });
         }
 
@@ -2204,7 +2210,7 @@ SpriteMorph.prototype.freshPalette = function (category) {
                     var hiddens = StageMorph.prototype.hiddenPrimitives,
                         defs = SpriteMorph.prototype.blocks;
                     Object.keys(hiddens).forEach(function (sel) {
-                        if (defs[sel].category === category) {
+                        if (defs[sel] && (defs[sel].category === category)) {
                             delete StageMorph.prototype.hiddenPrimitives[sel];
                         }
                     });
@@ -4858,6 +4864,20 @@ StageMorph.prototype.blockTemplates = function (category) {
         );
     }
 
+    function addVar(pair) {
+        if (pair) {
+            if (myself.variables.silentFind(pair[0])) {
+                myself.inform('that name is already in use');
+            } else {
+                myself.addVariable(pair[0], pair[1]);
+                myself.toggleVariableWatcher(pair[0], pair[1]);
+                myself.blocksCache[cat] = null;
+                myself.paletteCache[cat] = null;
+                myself.parentThatIsA(IDE_Morph).refreshPalette();
+            }
+        }
+    }
+
     if (cat === 'motion') {
 
         txt = new TextMorph(localize(
@@ -5099,15 +5119,7 @@ StageMorph.prototype.blockTemplates = function (category) {
             function () {
                 new VariableDialogMorph(
                     null,
-                    function (pair) {
-                        if (pair && !myself.variables.silentFind(pair[0])) {
-                            myself.addVariable(pair[0], pair[1]);
-                            myself.toggleVariableWatcher(pair[0], pair[1]);
-                            myself.blocksCache[cat] = null;
-                            myself.paletteCache[cat] = null;
-                            myself.parentThatIsA(IDE_Morph).refreshPalette();
-                        }
-                    },
+                    addVar,
                     myself
                 ).prompt(
                     'Variable name',
diff --git a/snap.html b/snap.html
index 904aba8..93b4c73 100755
--- a/snap.html
+++ b/snap.html
@@ -3,7 +3,7 @@
 	<head>
 		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 		<title>Snap! Build Your Own Blocks. Beta</title>
-        <link rel="shortcut icon" href="http://snap.berkeley.edu/fav3.gif" type="image/gif">
+		<link rel="shortcut icon" href="favicon.ico">
 		<script type="text/javascript" src="morphic.js"></script>
 		<script type="text/javascript" src="widgets.js"></script>
 		<script type="text/javascript" src="blocks.js"></script>
@@ -33,5 +33,5 @@
 	</head>
 	<body style="margin: 0;">
 		<canvas id="world" tabindex="1" style="position: absolute;" />
-    </body>
+	</body>
 </html>
diff --git a/store.js b/store.js
index cb91139..3568809 100644
--- a/store.js
+++ b/store.js
@@ -61,7 +61,7 @@ SyntaxElementMorph, Variable*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.store = '2014-October-01';
+modules.store = '2014-November-24';
 
 
 // XML_Serializer ///////////////////////////////////////////////////////
@@ -261,7 +261,9 @@ SnapSerializer.prototype.watcherLabels = {
     yPosition: 'y position',
     direction: 'direction',
     getScale: 'size',
+    getTempo: 'tempo',
     getLastAnswer: 'answer',
+    getLastMessage: 'message',
     getTimer: 'timer',
     getCostumeIdx: 'costume #',
     reportMouseX: 'mouse x',
@@ -1824,9 +1826,8 @@ Context.prototype.toXML = function (serializer) {
         return '';
     }
     return serializer.format(
-        '<context% ~><inputs>%</inputs><variables>%</variables>' +
+        '<context ~><inputs>%</inputs><variables>%</variables>' +
             '%<receiver>%</receiver>%</context>',
-        this.isLambda ? ' lambda="lambda"' : '',
         this.inputs.reduce(
                 function (xml, input) {
                     return xml + serializer.format('<input>$</input>', input);
diff --git a/threads.js b/threads.js
index 6a59f3c..a6b824b 100644
--- a/threads.js
+++ b/threads.js
@@ -83,7 +83,7 @@ ArgLabelMorph, localize, XML_Element, hex_sha512*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.threads = '2014-October-01';
+modules.threads = '2014-November-24';
 
 var ThreadManager;
 var Process;
@@ -100,8 +100,18 @@ function snapEquals(a, b) {
 
     var x = +a,
         y = +b,
+        i,
         specials = [true, false, ''];
 
+    // "zum Schneckengang verdorben, was Adlerflug geworden wäre"
+    // collecting edge-cases that somebody complained about
+    // on Github. Folks, take it easy and keep it fun, okay?
+    // Shit like this is patently ugly and slows Snap down. Tnx!
+    for (i = 9; i <= 13; i += 1) {
+        specials.push(String.fromCharCode(i));
+    }
+    specials.push(String.fromCharCode(160));
+
     // check for special values before coercing to numbers
     if (isNaN(x) || isNaN(y) ||
             [a, b].some(function (any) {return contains(specials, any) ||
@@ -110,7 +120,7 @@ function snapEquals(a, b) {
         y = b;
     }
 
-    // handle text comparision case-insensitive.
+    // handle text comparison case-insensitive.
     if (isString(x) && isString(y)) {
         return x.toLowerCase() === y.toLowerCase();
     }
@@ -136,7 +146,8 @@ ThreadManager.prototype.toggleProcess = function (block) {
 ThreadManager.prototype.startProcess = function (
     block,
     isThreadSafe,
-    exportResult
+    exportResult,
+    callback
 ) {
     var active = this.findProcess(block),
         top = block.topBlock(),
@@ -149,7 +160,7 @@ ThreadManager.prototype.startProcess = function (
         this.removeTerminatedProcesses();
     }
     top.addHighlight();
-    newProc = new Process(block.topBlock());
+    newProc = new Process(block.topBlock(), callback);
     newProc.exportResult = exportResult;
     this.processes.push(newProc);
     return newProc;
@@ -225,8 +236,9 @@ ThreadManager.prototype.removeTerminatedProcesses = function () {
     var remaining = [];
     this.processes.forEach(function (proc) {
         if (!proc.isRunning() && !proc.errorFlag && !proc.isDead) {
-            proc.topBlock.removeHighlight();
-
+            if (proc.topBlock instanceof BlockMorph) {
+                proc.topBlock.removeHighlight();
+            }
             if (proc.prompter) {
                 proc.prompter.destroy();
                 if (proc.homeContext.receiver.stopTalking) {
@@ -235,18 +247,22 @@ ThreadManager.prototype.removeTerminatedProcesses = function () {
             }
 
             if (proc.topBlock instanceof ReporterBlockMorph) {
-                if (proc.homeContext.inputs[0] instanceof List) {
-                    proc.topBlock.showBubble(
-                        new ListWatcherMorph(
-                            proc.homeContext.inputs[0]
-                        ),
-                        proc.exportResult
-                    );
+                if (proc.onComplete instanceof Function) {
+                    proc.onComplete(proc.homeContext.inputs[0]);
                 } else {
-                    proc.topBlock.showBubble(
-                        proc.homeContext.inputs[0],
-                        proc.exportResult
-                    );
+                    if (proc.homeContext.inputs[0] instanceof List) {
+                        proc.topBlock.showBubble(
+                            new ListWatcherMorph(
+                                proc.homeContext.inputs[0]
+                            ),
+                            proc.exportResult
+                        );
+                    } else {
+                        proc.topBlock.showBubble(
+                            proc.homeContext.inputs[0],
+                            proc.exportResult
+                        );
+                    }
                 }
             }
         } else {
@@ -295,9 +311,9 @@ ThreadManager.prototype.findProcess = function (block) {
                         are children
     receiver            object (sprite) to which the process applies,
                         cached from the top block
-    context                the Context describing the current state
+    context             the Context describing the current state
                         of this process
-    homeContext            stores information relevant to the whole process,
+    homeContext         stores information relevant to the whole process,
                         i.e. its receiver, result etc.
     isPaused            boolean indicating whether to pause
     readyToYield        boolean indicating whether to yield control to
@@ -305,15 +321,20 @@ ThreadManager.prototype.findProcess = function (block) {
     readyToTerminate    boolean indicating whether the stop method has
                         been called
     isDead              boolean indicating a terminated clone process
-    timeout                msecs after which to force yield
-    lastYield            msecs when the process last yielded
-    errorFlag            boolean indicating whether an error was encountered
+    timeout             msecs after which to force yield
+    lastYield           msecs when the process last yielded
+    errorFlag           boolean indicating whether an error was encountered
     prompter            active instance of StagePrompterMorph
     httpRequest         active instance of an HttpRequest or null
     pauseOffset         msecs between the start of an interpolated operation
                         and when the process was paused
     exportResult        boolean flag indicating whether a picture of the top
                         block along with the result bubble shoud be exported
+    onComplete          an optional callback function to be executed when
+                        the process is done
+    procedureCount      number counting procedure call entries,
+                        used to tag custom block calls, so "stop block"
+                        invocations can catch them
 */
 
 Process.prototype = {};
@@ -321,7 +342,7 @@ Process.prototype.contructor = Process;
 Process.prototype.timeout = 500; // msecs after which to force yield
 Process.prototype.isCatchingErrors = true;
 
-function Process(topBlock) {
+function Process(topBlock, onComplete) {
     this.topBlock = topBlock || null;
 
     this.readyToYield = false;
@@ -338,6 +359,8 @@ function Process(topBlock) {
     this.pauseOffset = null;
     this.frameCount = 0;
     this.exportResult = false;
+    this.onComplete = onComplete || null;
+    this.procedureCount = 0;
 
     if (topBlock) {
         this.homeContext.receiver = topBlock.receiver();
@@ -435,7 +458,6 @@ Process.prototype.pauseStep = function () {
 
 Process.prototype.evaluateContext = function () {
     var exp = this.context.expression;
-
     this.frameCount += 1;
     if (exp instanceof Array) {
         return this.evaluateSequence(exp);
@@ -526,6 +548,34 @@ Process.prototype.reportAnd = function (block) {
     }
 };
 
+/* 
+    tail-call-elimination for reporters
+    -----------------------------------
+    currently under construction, commented out for now
+    to activate add 'doReport' to the list of special forms
+    selectors in evaluateBlock() and comment out / remove
+    the current 'doReport' primitive in the "return"
+    section of the code
+
+Process.prototype.doReport = function (block) {
+
+//    if (this.context.expression.partOfCustomCommand) {
+//        return this.doStopCustomBlock();
+//    }
+
+    var outer = this.context.outerContext;
+    while (this.context && this.context.expression !== 'exitReporter') {
+        if (this.context.expression === 'doStopWarping') {
+            this.doStopWarping();
+        } else {
+            this.popContext();
+        }
+    }
+    this.popContext();
+    this.pushContext(block.inputs()[0], outer);
+};
+*/
+
 // Process: Non-Block evaluation
 
 Process.prototype.evaluateMultiSlot = function (multiSlot, argCount) {
@@ -586,7 +636,6 @@ Process.prototype.evaluateInput = function (input) {
                 ) || (input instanceof CSlotMorph && !input.isStatic)) {
                 // I know, this still needs yet to be done right....
                 ans = this.reify(ans, new List());
-                ans.isImplicitLambda = true;
             }
         }
     }
@@ -597,8 +646,6 @@ Process.prototype.evaluateInput = function (input) {
 Process.prototype.evaluateSequence = function (arr) {
     var pc = this.context.pc,
         outer = this.context.outerContext,
-        isLambda = this.context.isLambda,
-        isImplicitLambda = this.context.isImplicitLambda,
         isCustomBlock = this.context.isCustomBlock;
     if (pc === (arr.length - 1)) { // tail call elimination
         this.context = new Context(
@@ -607,8 +654,6 @@ Process.prototype.evaluateSequence = function (arr) {
             this.context.outerContext,
             this.context.receiver
         );
-        this.context.isLambda = isLambda;
-        this.context.isImplicitLambda = isImplicitLambda;
         this.context.isCustomBlock = isCustomBlock;
     } else {
         if (pc >= arr.length) {
@@ -626,8 +671,8 @@ Process.prototype.evaluateSequence = function (arr) {
 Caution: we cannot just revert to this version of the method, because to make
 tail call elimination work many tweaks had to be done to various primitives.
 For the most part these tweaks are about schlepping the outer context (for
-the variable bindings) and the isLambda flag along, and are indicated by a
-short comment in the code. But to really revert would take a good measure
+the variable bindings) and the isCustomBlock flag along, and are indicated
+by a short comment in the code. But to really revert would take a good measure
 of trial and error as well as debugging. In the developers file archive there
 is a version of threads.js dated 120119(2) which basically resembles the
 last version before introducing tail call optimization on 120123.
@@ -679,6 +724,11 @@ Process.prototype.doYield = function () {
     }
 };
 
+Process.prototype.exitReporter = function () {
+    // catch-tag for REPORT and STOP BLOCK primitives
+    this.handleError(new Error("missing 'report' statement in reporter"));
+};
+
 // Process Exception Handling
 
 Process.prototype.handleError = function (error, element) {
@@ -757,8 +807,8 @@ Process.prototype.reportJSFunction = function (parmNames, body) {
     );
 };
 
-Process.prototype.doRun = function (context, args, isCustomBlock) {
-    return this.evaluate(context, args, true, isCustomBlock);
+Process.prototype.doRun = function (context, args) {
+    return this.evaluate(context, args, true);
 };
 
 Process.prototype.evaluate = function (
@@ -783,6 +833,7 @@ Process.prototype.evaluate = function (
     var outer = new Context(null, null, context.outerContext),
         runnable,
         extra,
+        exit,
         parms = args.asArray(),
         i,
         value;
@@ -798,23 +849,17 @@ Process.prototype.evaluate = function (
     );
     extra = new Context(runnable, 'doYield');
 
-    /*
-        Note: if the context's expression is a ReporterBlockMorph,
-        the extra context gets popped off immediately without taking
-        effect (i.e. it doesn't yield within evaluating a stack of
-        nested reporters)
-    */
+        // Note: if the context's expression is a ReporterBlockMorph,
+        // the extra context gets popped off immediately without taking
+        // effect (i.e. it doesn't yield within evaluating a stack of
+        // nested reporters)
 
-    if (isCommand || (context.expression instanceof ReporterBlockMorph)) {
+    if (context.expression instanceof ReporterBlockMorph) {
         this.context.parentContext = extra;
     } else {
         this.context.parentContext = runnable;
     }
 
-    runnable.isLambda = true;
-    runnable.isImplicitLambda = context.isImplicitLambda;
-    runnable.isCustomBlock = false;
-
     // assign parameters if any were passed
     if (parms.length > 0) {
 
@@ -849,8 +894,9 @@ Process.prototype.evaluate = function (
 
             } else if (context.emptySlots !== 1) {
                 throw new Error(
-                    'expecting ' + context.emptySlots + ' input(s), '
-                        + 'but getting ' + parms.length
+                    localize('expecting') + ' ' + context.emptySlots + ' '
+                        + localize('input(s), but getting') + ' '
+                        + parms.length
                 );
             }
         }
@@ -858,6 +904,18 @@ Process.prototype.evaluate = function (
 
     if (runnable.expression instanceof CommandBlockMorph) {
         runnable.expression = runnable.expression.blockSequence();
+
+        // insert a reporter exit tag for the
+        // CALL SCRIPT primitive variant
+        if (!isCommand) {
+            exit = new Context(
+                runnable.parentContext,
+                'exitReporter',
+                outer,
+                outer.receiver
+            );
+            runnable.parentContext = exit;
+        }
     }
 };
 
@@ -867,6 +925,9 @@ Process.prototype.fork = function (context, args) {
             'continuations cannot be forked'
         );
     }
+    if (!(context instanceof Context)) {
+        throw new Error('expecting a ring but getting ' + context);
+    }
 
     var outer = new Context(null, null, context.outerContext),
         runnable = new Context(null,
@@ -879,8 +940,6 @@ Process.prototype.fork = function (context, args) {
         stage = this.homeContext.receiver.parentThatIsA(StageMorph),
         proc = new Process();
 
-    runnable.isLambda = true;
-
     // assign parameters if any were passed
     if (parms.length > 0) {
 
@@ -915,8 +974,9 @@ Process.prototype.fork = function (context, args) {
 
             } else if (context.emptySlots !== 1) {
                 throw new Error(
-                    'expecting ' + context.emptySlots + ' input(s), '
-                        + 'but getting ' + parms.length
+                    localize('expecting') + ' ' + context.emptySlots + ' '
+                        + localize('input(s), but getting') + ' '
+                        + parms.length
                 );
             }
         }
@@ -933,68 +993,62 @@ Process.prototype.fork = function (context, args) {
     stage.threads.processes.push(proc);
 };
 
-Process.prototype.doReport = function (value, isCSlot) {
-    while (this.context && !this.context.isLambda) {
+// Process "return" primitives
+
+Process.prototype.doReport = function (value) {
+    if (this.context.expression.partOfCustomCommand) {
+        return this.doStopCustomBlock();
+    }
+    while (this.context && this.context.expression !== 'exitReporter') {
         if (this.context.expression === 'doStopWarping') {
             this.doStopWarping();
         } else {
             this.popContext();
         }
     }
-    if (this.context && this.context.isImplicitLambda) {
+    return value;
+};
+
+Process.prototype.doStopBlock = function () {
+    var target = this.context.expression.exitTag;
+    if (isNil(target)) {
+        return this.doStopCustomBlock();
+    }
+    while (this.context &&
+            (isNil(this.context.tag) || (this.context.tag > target))) {
         if (this.context.expression === 'doStopWarping') {
             this.doStopWarping();
         } else {
             this.popContext();
         }
-        return this.doReport(value, true);
     }
-    if (this.context && this.context.isCustomBlock) {
-        // now I'm back at the custom block sequence.
-        // advance my pc to my expression's length
-        this.context.pc = this.context.expression.length - 1;
-    }
-    if (isCSlot) {
-        if (this.context &&
-                this.context.parentContext &&
-                this.context.parentContext.expression instanceof Array) {
+    this.pushContext();
+};
+
+Process.prototype.doStopCustomBlock = function () {
+    // fallback solution for "report" blocks inside
+    // custom command definitions and untagged "stop" blocks
+    while (this.context && !this.context.isCustomBlock) {
+        if (this.context.expression === 'doStopWarping') {
+            this.doStopWarping();
+        } else {
             this.popContext();
         }
     }
-    return value;
-};
-
-Process.prototype.doStopBlock = function () {
-    this.doReport();
-};
-
-// Process evaluation variants, commented out for now (redundant)
-
-/*
-Process.prototype.doRunWithInputList = function (context, args) {
-    // provide an extra selector for the palette
-    return this.doRun(context, args);
-};
-
-Process.prototype.evaluateWithInputList = function (context, args) {
-    // provide an extra selector for the palette
-    return this.evaluate(context, args);
 };
 
-Process.prototype.forkWithInputList = function (context, args) {
-    // provide an extra selector for the palette
-    return this.fork(context, args);
-};
-*/
-
 // Process continuations primitives
 
-Process.prototype.doCallCC = function (aContext) {
-    this.evaluate(aContext, new List([this.context.continuation()]));
+Process.prototype.doCallCC = function (aContext, isReporter) {
+    this.evaluate(
+        aContext,
+        new List([this.context.continuation()]),
+        !isReporter
+    );
 };
 
 Process.prototype.reportCallCC = function (aContext) {
-    this.doCallCC(aContext);
+    this.doCallCC(aContext, true);
 };
 
 Process.prototype.runContinuation = function (aContext, args) {
@@ -1012,19 +1066,22 @@ Process.prototype.runContinuation = function (aContext, args) {
 // Process custom block primitives
 
 Process.prototype.evaluateCustomBlock = function () {
-    var context = this.context.expression.definition.body,
+    var caller = this.context.parentContext,
+        context = this.context.expression.definition.body,
         declarations = this.context.expression.definition.declarations,
         args = new List(this.context.inputs),
         parms = args.asArray(),
         runnable,
+        exit,
         extra,
         i,
         value,
         outer;
 
     if (!context) {return null; }
+    this.procedureCount += 1;
     outer = new Context();
-    outer.receiver = this.context.receiver; // || this.homeContext.receiver;
+    outer.receiver = this.context.receiver;
     outer.variables.parentFrame = outer.receiver ?
             outer.receiver.variables : null;
 
@@ -1032,16 +1089,12 @@ Process.prototype.evaluateCustomBlock = function () {
         this.context.parentContext,
         context.expression,
         outer,
-        outer.receiver,
-        true // is custom block
+        outer.receiver
     );
+    runnable.isCustomBlock = true;
     extra = new Context(runnable, 'doYield');
-
     this.context.parentContext = extra;
 
-    runnable.isLambda = true;
-    runnable.isCustomBlock = true;
-
     // passing parameters if any were passed
     if (parms.length > 0) {
 
@@ -1063,6 +1116,29 @@ Process.prototype.evaluateCustomBlock = function () {
     }
 
     if (runnable.expression instanceof CommandBlockMorph) {
+        // insert a reporter exit tag for the
+        // CALL SCRIPT primitive variant
+        if (this.context.expression.definition.type !== 'command') {
+            exit = new Context(
+                runnable.parentContext,
+                'exitReporter',
+                outer,
+                outer.receiver
+            );
+            runnable.parentContext = exit;
+        } else {
+            // tag all "stop this block" blocks with the current
+            // procedureCount as exitTag, and mark all "report" blocks
+            // as being inside a custom command definition
+            runnable.expression.tagExitBlocks(this.procedureCount, true);
+
+            // tag the caller with the current procedure count, so
+            // "stop this block" blocks can catch it, but only
+            // if the caller hasn't been tagged already
+            if (caller && !caller.tag) {
+                caller.tag = this.procedureCount;
+            }
+        }
         runnable.expression = runnable.expression.blockSequence();
     }
 };
@@ -1148,7 +1224,7 @@ Process.prototype.doShowVar = function (varName) {
             if (isGlobal || target.owner) {
                 label = name;
             } else {
-                label = name + ' (temporary)';
+                label = name + ' ' + localize('(temporary)');
             }
             watcher = new WatcherMorph(
                 label,
@@ -1259,7 +1335,7 @@ Process.prototype.doInsertInList = function (element, index, list) {
         return null;
     }
     if (this.inputOption(index) === 'any') {
-        idx = this.reportRandom(1, list.length());
+        idx = this.reportRandom(1, list.length() + 1);
     }
     if (this.inputOption(index) === 'last') {
         idx = list.length() + 1;
@@ -1308,16 +1384,12 @@ Process.prototype.reportListContainsItem = function (list, element) {
 Process.prototype.doIf = function () {
     var args = this.context.inputs,
         outer = this.context.outerContext, // for tail call elimination
-        isLambda = this.context.isLambda,
-        isImplicitLambda = this.context.isImplicitLambda,
         isCustomBlock = this.context.isCustomBlock;
 
     this.popContext();
     if (args[0]) {
         if (args[1]) {
             this.pushContext(args[1].blockSequence(), outer);
-            this.context.isLambda = isLambda;
-            this.context.isImplicitLambda = isImplicitLambda;
             this.context.isCustomBlock = isCustomBlock;
         }
     }
@@ -1327,8 +1399,6 @@ Process.prototype.doIf = function () {
 Process.prototype.doIfElse = function () {
     var args = this.context.inputs,
         outer = this.context.outerContext, // for tail call elimination
-        isLambda = this.context.isLambda,
-        isImplicitLambda = this.context.isImplicitLambda,
         isCustomBlock = this.context.isCustomBlock;
 
     this.popContext();
@@ -1344,8 +1414,6 @@ Process.prototype.doIfElse = function () {
         }
     }
     if (this.context) {
-        this.context.isLambda = isLambda;
-        this.context.isImplicitLambda = isImplicitLambda;
         this.context.isCustomBlock = isCustomBlock;
     }
 
@@ -1420,8 +1488,6 @@ Process.prototype.doStopOthers = function (choice) {
 Process.prototype.doWarp = function (body) {
     // execute my contents block atomically (more or less)
     var outer = this.context.outerContext, // for tail call elimination
-        isLambda = this.context.isLambda,
-        isImplicitLambda = this.context.isImplicitLambda,
         isCustomBlock = this.context.isCustomBlock,
         stage;
 
@@ -1438,13 +1504,8 @@ Process.prototype.doWarp = function (body) {
                 stage.fps = 0; // variable frame rate
             }
         }
-
         this.pushContext('doYield');
-
-        this.context.isLambda = isLambda;
-        this.context.isImplicitLambda = isImplicitLambda;
         this.context.isCustomBlock = isCustomBlock;
-
         if (!this.isAtomic) {
             this.pushContext('doStopWarping');
         }
@@ -1523,28 +1584,19 @@ Process.prototype.doForever = function (body) {
 Process.prototype.doRepeat = function (counter, body) {
     var block = this.context.expression,
         outer = this.context.outerContext, // for tail call elimination
-        isLambda = this.context.isLambda,
-        isImplicitLambda = this.context.isImplicitLambda,
         isCustomBlock = this.context.isCustomBlock;
 
     if (counter < 1) { // was '=== 0', which caused infinite loops on non-ints
         return null;
     }
     this.popContext();
-
     this.pushContext(block, outer);
-
-    this.context.isLambda = isLambda;
-    this.context.isImplicitLambda = isImplicitLambda;
     this.context.isCustomBlock = isCustomBlock;
-
     this.context.addInput(counter - 1);
-
     this.pushContext('doYield');
     if (body) {
         this.pushContext(body.blockSequence());
     }
-
     this.pushContext();
 };
 
@@ -2134,15 +2186,17 @@ Process.prototype.reportTextSplit = function (string, delimiter) {
         str,
         del;
     if (!contains(types, strType)) {
-        throw new Error('expecting a text instad of a ' + strType);
+        throw new Error('expecting text instead of a ' + strType);
     }
     if (!contains(types, delType)) {
-        throw new Error('expecting a text delimiter instad of a ' + delType);
+        throw new Error('expecting a text delimiter instead of a ' + delType);
     }
     str = (string || '').toString();
     switch (this.inputOption(delimiter)) {
     case 'line':
-        del = '\n';
+        // Unicode Compliant Line Splitting (Platform independent)
+        // http://www.unicode.org/reports/tr18/#Line_Boundaries
+        del = /\r\n|[\n\v\f\r\x85\u2028\u2029]/;
         break;
     case 'tab':
         del = '\t';
@@ -2151,7 +2205,9 @@ Process.prototype.reportTextSplit = function (string, delimiter) {
         del = '\r';
         break;
     case 'whitespace':
-        return new List(str.trim().split(/[\t\r\n ]+/));
+        str = str.trim();
+        del = /\s+/;
+        break;
     case 'letter':
         del = '';
         break;
@@ -2760,25 +2816,25 @@ Process.prototype.reportFrameCount = function () {
 
     structure:
 
-    parentContext    the Context to return to when this one has
+    parentContext   the Context to return to when this one has
                     been evaluated.
     outerContext    the Context holding my lexical scope
-    expression        SyntaxElementMorph, an array of blocks to evaluate,
+    expression      SyntaxElementMorph, an array of blocks to evaluate,
                     null or a String denoting a selector, e.g. 'doYield'
     receiver        the object to which the expression applies, if any
-    variables        the current VariableFrame, if any
-    inputs            an array of input values computed so far
+    variables       the current VariableFrame, if any
+    inputs          an array of input values computed so far
                     (if expression is a    BlockMorph)
-    pc                the index of the next block to evaluate
+    pc              the index of the next block to evaluate
                     (if expression is an array)
-    startTime        time when the context was first evaluated
-    startValue        initial value for interpolated operations
+    startTime       time when the context was first evaluated
+    startValue      initial value for interpolated operations
     activeAudio     audio buffer for interpolated operations, don't persist
     activeNote      audio oscillator for interpolated ops, don't persist
-    isLambda        marker for return ops
-    isImplicitLambda    marker for return ops
     isCustomBlock   marker for return ops
-    emptySlots        caches the number of empty slots for reification
+    emptySlots      caches the number of empty slots for reification
+    tag             string or number to optionally identify the Context,
+                    as a "return" target (for the "stop block" primitive)
 */
 
 function Context(
@@ -2801,22 +2857,19 @@ function Context(
     this.startTime = null;
     this.activeAudio = null;
     this.activeNote = null;
-    this.isLambda = false; // marks the end of a lambda
-    this.isImplicitLambda = false; // marks the end of a C-shaped slot
     this.isCustomBlock = false; // marks the end of a custom block's stack
     this.emptySlots = 0; // used for block reification
+    this.tag = null;  // lexical catch-tag for custom blocks
 }
 
 Context.prototype.toString = function () {
-    var pref = this.isLambda ? '\u03BB-' : '',
-        expr = this.expression;
-
+    var expr = this.expression;
     if (expr instanceof Array) {
         if (expr.length > 0) {
             expr = '[' + expr[0] + ']';
         }
     }
-    return pref + 'Context >> ' + expr + ' ' + this.variables;
+    return 'Context >> ' + expr + ' ' + this.variables;
 };
 
 Context.prototype.image = function () {
@@ -2872,6 +2925,9 @@ Context.prototype.continuation = function () {
     } else {
         return new Context(null, 'doStop');
     }
+    if (cont.expression === 'exitReporter') {
+        return cont.continuation();
+    }
     cont = cont.copyForContinuation();
     cont.isContinuation = true;
     return cont;
@@ -3003,9 +3059,9 @@ VariableFrame.prototype.find = function (name) {
     var frame = this.silentFind(name);
     if (frame) {return frame; }
     throw new Error(
-        'a variable of name \''
+        localize('a variable of name \'')
             + name
-            + '\'\ndoes not exist in this context'
+            + localize('\'\ndoes not exist in this context')
     );
 };
 
@@ -3070,9 +3126,9 @@ VariableFrame.prototype.getVar = function (name) {
         return '';
     }
     throw new Error(
-        'a variable of name \''
+        localize('a variable of name \'')
             + name
-            + '\'\ndoes not exist in this context'
+            + localize('\'\ndoes not exist in this context')
     );
 };
 
diff --git a/tools.xml b/tools.xml
index 25336c9..e05d7bb 100644
--- a/tools.xml
+++ b/tools.xml
@@ -1 +1 @@
-<blocks app="Snap! 4.0, http://snap.berkeley.edu" version="1"><block-definition s="map %&apos;function&apos; over %&apos;lists&apos;" type="reporter" category="lists"><header></header><code></code><inputs><input type="%repRing"></input><input type="%mult%l"></input></inputs><script><block s="doWarp"><script><block s="doDeclareVariables"><list><l>mapone</l><l>mapmany</l></list></block><block s="doSetVar"><l>mapone</l><block s="reifyScript"><script><block s="doIf"><custom-block s="empty? %l"><block var="data"/></custom-block><script><block s="doReport"><block s="reportNewList"><list></list></block></block></script></block><block s="doReport"><block s="reportCONS"><block s="evaluate"><block var="function"/><list><block s="reportListItem"><l>1</l><block var="data"/></block></list></block><block s="evaluate"><block var="mapone"/><list><block s="reportCDR"><block var="data"/></block></list></block></block></block></script><list><l>data</l></list></block></block><block s="doSetVar"><l>mapmany</l><block s="reifyScript"><script><block s="doIf"><custom-block s="empty? 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