multi-line and monospaced "code" input slots for custom blocks

HISTORY.md

@@ -12,6 +12,7 @@
     * new "object" reporter in the Sensing category for getting a sprite by its name
     * blocks for changing and querying the "flat line ends" setting 
     * selectors for changing and querying "draggable" and "rotation style" settings
+    * multi-line and monospaced "code" input slots for custom blocks
     * new "string" library, thanks, Brian
     * added "neg" selector to monadic function reporter in "Operators" category
     * enhances support for embedding Snap in other website, thanks, Bernat!
@@ -34,6 +35,9 @@
     * Greek, thanks, Alexandros!
     * German
 
+### 2019-02-01
+* BYOB: new experimental feature: special multi-line and monospaced input slot types
+
 ### 2019-01-28
 * Threads, Objects: new "object" reporter in the Sensing category
 * Blocks, Objects, Threads: added "flat line ends" option to "turbo mode" accessor blocks

snap.html

@@ -12,7 +12,7 @@
         <script type="text/javascript" src="src/gui.js?version=2019-01-28"></script>
         <script type="text/javascript" src="src/paint.js?version=2018-10-02"></script>
         <script type="text/javascript" src="src/lists.js?version=2019-01-10"></script>
-        <script type="text/javascript" src="src/byob.js?version=2019-01-21"></script>
+        <script type="text/javascript" src="src/byob.js?version=2019-02-01"></script>
         <script type="text/javascript" src="src/tables.js?version=2018-10-02"></script>
         <script type="text/javascript" src="src/symbols.js?version=2019-01-14"></script>
         <script type="text/javascript" src="src/sketch.js?version=2018-10-02"></script>

src/byob.js

@@ -108,7 +108,7 @@ BooleanSlotMorph, XML_Serializer, SnapTranslator*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.byob = '2019-January-21';
+modules.byob = '2019-February-01';
 
 // Declarations
 
@@ -3619,7 +3619,10 @@ InputSlotDialogMorph.prototype.addSlotsMenu = function () {
     var myself = this;
 
     this.slots.userMenu = function () {
-        if (contains(['%s', '%n', '%txt', '%anyUE'], myself.fragment.type)) {
+        if (contains(
+            ['%s', '%n', '%txt', '%anyUE', '%mlt', '%code'],
+            myself.fragment.type)
+        ) {
             var menu = new MenuMorph(myself),
                 on = '\u2611 ',
                 off = '\u2610 ';
@@ -3631,9 +3634,11 @@ InputSlotDialogMorph.prototype.addSlotsMenu = function () {
                          !myself.fragment.isReadOnly;
                          }
             );
+            menu.addLine();
+            menu.addMenu('special', myself.specialSlotsMenu());
             return menu;
         }
-        return Morph.prototype.userMenu.call(myself);
+        return myself.specialSlotsMenu();
     };
 };
 
@@ -3657,6 +3662,24 @@ InputSlotDialogMorph.prototype.editSlotOptions = function () {
     );
 };
 
+InputSlotDialogMorph.prototype.specialSlotsMenu = function () {
+    var menu = new MenuMorph(this.setSlotType, null, this),
+        myself = this,
+        on = '\u2611 ',
+        off = '\u2610 ';
+
+    function addSpecialSlotType(label, spec) {
+        menu.addItem(
+            (myself.fragment.type === spec ? on : off) + localize(label),
+            spec
+        );
+    }
+
+    addSpecialSlotType('multi-line', '%mlt');
+    addSpecialSlotType('code', '%code');
+    return menu;
+};
+
 // InputSlotDialogMorph hiding and showing:
 
 /*