export multi-scene projects

HISTORY.md

@@ -11,6 +11,7 @@
 ### 2021-04-16
 * scenes, store, gui: remember last edited sprite in a scene / project
 * scenes: removed Project class
+* scenes, store, gui: export multi-scene projects
 
 ### 2021-04-14
 * scenes: new Project class

src/gui.js

@@ -67,7 +67,7 @@
 */
 
 /*global modules, Morph, SpriteMorph, SyntaxElementMorph, Color, Cloud, Audio,
-ListWatcherMorph, TextMorph, newCanvas, useBlurredShadows, Sound, Scene,
+ListWatcherMorph, TextMorph, newCanvas, useBlurredShadows, Sound, Scene, Note,
 StringMorph, Point, MenuMorph, morphicVersion, DialogBoxMorph, normalizeCanvas,
 ToggleButtonMorph, contains, ScrollFrameMorph, StageMorph, PushButtonMorph, sb,
 InputFieldMorph, FrameMorph, Process, nop, SnapSerializer, ListMorph, detect,
@@ -79,7 +79,7 @@ CommandBlockMorph, BooleanSlotMorph, RingReporterSlotMorph, ScriptFocusMorph,
 BlockLabelPlaceHolderMorph, SpeechBubbleMorph, XML_Element, WatcherMorph, WHITE,
 BlockRemovalDialogMorph,TableMorph, isSnapObject, isRetinaEnabled, SliderMorph,
 disableRetinaSupport, enableRetinaSupport, isRetinaSupported, MediaRecorder,
-Animation, BoxMorph, BlockEditorMorph, BlockDialogMorph, Note, ZERO, BLACK*/
+Animation, BoxMorph, BlockEditorMorph, BlockDialogMorph, Project, ZERO, BLACK*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
@@ -4710,6 +4710,11 @@ IDE_Morph.prototype.exportProject = function (name, plain) {
     // newWindow requests displaying the project in a new tab.
     var menu, str, dataPrefix;
 
+    if (this.scenes.length() > 1) { // +++
+        this.exportScenes(this.scenes.at(1).name, plain);
+        return;
+    }
+
     if (name) {
         this.setProjectName(name);
         dataPrefix = 'data:text/' + plain ? 'plain,' : 'xml,';
@@ -4731,6 +4736,32 @@ IDE_Morph.prototype.exportProject = function (name, plain) {
     }
 };
 
+IDE_Morph.prototype.exportScenes = function (name, plain) { // +++
+    // experimental export of multi-scene project - under construction
+
+    var menu, str, dataPrefix;
+
+    if (name) {
+        this.setProjectName(name);
+        dataPrefix = 'data:text/' + plain ? 'plain,' : 'xml,';
+        try {
+            menu = this.showMessage('Exporting');
+            str = this.serializer.serialize(new Project(this.scenes));
+            this.setURL('#open:' + dataPrefix + encodeURIComponent(str));
+            this.saveXMLAs(str, name);
+            menu.destroy();
+            this.recordSavedChanges();
+            this.showMessage('Exported!', 1);
+        } catch (err) {
+            if (Process.prototype.isCatchingErrors) {
+                this.showMessage('Export failed: ' + err);
+            } else {
+                throw err;
+            }
+        }
+    }
+};
+
 IDE_Morph.prototype.exportGlobalBlocks = function () {
     if (this.stage.globalBlocks.length > 0) {
         new BlockExportDialogMorph(

src/scenes.js

@@ -34,6 +34,7 @@
     the following list shows the order in which all constructors are
     defined. Use this list to locate code in this document:
 
+    Project
     Scene
 
     credits
@@ -51,6 +52,23 @@
 
 modules.scenes = '2021-April-16';
 
+
+// Projecct /////////////////////////////////////////////////////////
+
+// I am a container for a set of one or more Snap! scenes,
+// the IDE operates on an instance of me
+
+// Project instance creation:
+
+function Project(scenes) {
+    this.name = '';
+    this.notes = '';
+    this.scenes = scenes || new List();
+
+    // for undeleting scenes - do not persist
+    this.trash = [];
+}
+
 // Scene /////////////////////////////////////////////////////////
 
 // I am a container for a Snap! stage, scene-global variables

src/store.js

@@ -56,7 +56,8 @@ Color, List, newCanvas, Costume, Audio, IDE_Morph, ScriptsMorph, ArgLabelMorph,
 BlockMorph, ArgMorph, InputSlotMorph, TemplateSlotMorph, CommandSlotMorph,
 FunctionSlotMorph, MultiArgMorph, ColorSlotMorph, nop, CommentMorph, isNil,
 localize, SVG_Costume, MorphicPreferences, Process, isSnapObject, Variable,
-SyntaxElementMorph, BooleanSlotMorph, normalizeCanvas, contains, Scene*/
+SyntaxElementMorph, BooleanSlotMorph, normalizeCanvas, contains, Scene,
+Project*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
@@ -1622,7 +1623,14 @@ Array.prototype.toXML = function (serializer) {
     );
 };
 
-// Scenes
+// Scenes & multi-scene projects
+
+Project.prototype.toXML = function (serializer) {
+    return serializer.format(
+        '<scenes>%</scenes>',
+        serializer.store(this.scenes.itemsArray())
+    );
+};
 
 Scene.prototype.toXML = function (serializer) {
     var tmp = new Scene(),