remember last edited scene in a project

HISTORY.md

@@ -14,6 +14,7 @@
 * gui: sceneified toggling dynamic input labels and switching languages
 * gui: sceneified "zoom blocks"
 * store: moved sprite-selection attribute from stage to scenes tag
+* scenes, store, gui: remember last edited scene in a project
 
 ### 2021-04-22
 * store, gui: first pass at deserializing multi-scene projects

snap.html

@@ -11,7 +11,7 @@
         <script src="src/blocks.js?version=2021-04-12"></script>
         <script src="src/threads.js?version=2021-04-12"></script>
         <script src="src/objects.js?version=2021-04-12"></script>
-        <script src="src/scenes.js?version=2021-04-22"></script>
+        <script src="src/scenes.js?version=2021-04-23"></script>
         <script src="src/gui.js?version=2021-04-23"></script>
         <script src="src/paint.js?version=2021-03-17"></script>
         <script src="src/lists.js?version=2021-03-15"></script>

src/gui.js

@@ -2587,12 +2587,16 @@ IDE_Morph.prototype.refreshIDE = function () {
 
     if (Process.prototype.isCatchingErrors) {
         try {
-            projectData = this.serializer.serialize(new Project(this.scenes));
+            projectData = this.serializer.serialize(
+                new Project(this.scenes, this.scene)
+            );
         } catch (err) {
             this.showMessage('Serialization failed: ' + err);
         }
     } else {
-        projectData = this.serializer.serialize(new Project(this.scenes));
+        projectData = this.serializer.serialize(
+            new Project(this.scenes, this.scene)
+        );
     }
     SpriteMorph.prototype.initBlocks();
     this.buildPanes();
@@ -2786,7 +2790,7 @@ IDE_Morph.prototype.backupAndDo = function (callback) {
     var username = this.cloud.username;
     try {
         localStorage['-snap-backup-'] = this.serializer.serialize(
-            new Project(this.scenes)
+            new Project(this.scenes, this.scene)
         );
         delete localStorage['-snap-bakflag-'];
         if (username) {
@@ -4716,7 +4720,9 @@ IDE_Morph.prototype.exportProject = function (name, plain) {
         dataPrefix = 'data:text/' + plain ? 'plain,' : 'xml,';
         try {
             menu = this.showMessage('Exporting');
-            str = this.serializer.serialize(new Project(this.scenes));
+            str = this.serializer.serialize(
+                new Project(this.scenes, this.scene)
+            );
             this.setURL('#open:' + dataPrefix + encodeURIComponent(str));
             this.saveXMLAs(str, name);
             menu.destroy();
@@ -5397,7 +5403,10 @@ IDE_Morph.prototype.openProject = function (project) {
     } else {
         this.scenes = project.scenes;
     }
-    this.switchToScene(project.scenes.at(1), true); // refresh album
+    this.switchToScene(
+        project.currentScene || project.scenes.at(1),
+        true  // refresh album
+    );
 };
 
 IDE_Morph.prototype.switchToScene = function (scene, refreshAlbum) {
@@ -6010,13 +6019,15 @@ IDE_Morph.prototype.reflectLanguage = function (lang, callback, noSave) {
         if (Process.prototype.isCatchingErrors) {
             try {
                 projectData = this.serializer.serialize(
-                    new Project(this.scenes)
+                    new Project(this.scenes, this.scene)
                 );
             } catch (err) {
                 this.showMessage('Serialization failed: ' + err);
             }
         } else {
-            projectData = this.serializer.serialize(new Project(this.scenes));
+            projectData = this.serializer.serialize(
+                new Project(this.scenes, this.scene)
+            );
         }
     }
     SpriteMorph.prototype.initBlocks();
@@ -6119,12 +6130,16 @@ IDE_Morph.prototype.setBlocksScale = function (num) {
     var projectData;
     if (Process.prototype.isCatchingErrors) {
         try {
-            projectData = this.serializer.serialize(new Project(this.scenes));
+            projectData = this.serializer.serialize(
+                new Project(this.scenes, this.scene)
+            );
         } catch (err) {
             this.showMessage('Serialization failed: ' + err);
         }
     } else {
-        projectData = this.serializer.serialize(new Project(this.scenes));
+        projectData = this.serializer.serialize(
+            new Project(this.scenes, this.scene)
+        );
     }
     SyntaxElementMorph.prototype.setScale(num);
     CommentMorph.prototype.refreshScale();

src/scenes.js

@@ -50,7 +50,7 @@
 
 /*global modules, VariableFrame, StageMorph, SpriteMorph, Process, List*/
 
-modules.scenes = '2021-April-22';
+modules.scenes = '2021-April-23';
 
 
 // Projecct /////////////////////////////////////////////////////////
@@ -60,16 +60,27 @@ modules.scenes = '2021-April-22';
 
 // Project instance creation:
 
-function Project(scenes) {
+function Project(scenes, current) {
     this.name = 'Test';
     this.notes = 'some notes';
     this.thumbnail = null;
     this.scenes = scenes || new List();
+    this.currentScene = current;
+
+    // for deserializing - do not persist
+    this.sceneIdx = null;
 
     // for undeleting scenes - do not persist
     this.trash = [];
 }
 
+Project.prototype.initialize = function () {
+    // initialize after deserializing
+    // only to be called by store
+    this.currentScene = this.scenes.at(+this.sceneIdx || 1);
+    return this;
+};
+
 Project.prototype.addDefaultScene = function () {
     var scene = new Scene();
     scene.addDefaultSprite();

src/store.js

@@ -334,13 +334,16 @@ SnapSerializer.prototype.loadProjectModel = function (xmlNode, ide, remixID) {
         );
     }
     if (scenesModel) {
+        if (scenesModel.attributes.select) {
+            project.sceneIdx = +scenesModel.attributes.select;
+        }
         scenesModel.childrenNamed('scene').forEach(model =>
             project.scenes.add(this.loadScene(model))
         );
     } else {
         project.scenes.add(this.loadScene(xmlNode, remixID));
     }
-    return project;
+    return project.initialize();
 };
 
 SnapSerializer.prototype.loadScene = function (xmlNode, remixID) {
@@ -1652,13 +1655,15 @@ Project.prototype.toXML = function (serializer) {
         '<project name="@" app="@" version="@">' +
             '<notes>$</notes>' +
             '<thumbnail>$</thumbnail>' +
-            '<scenes>%</scenes>' +
+            '<scenes select="@">%</scenes>' +
             '</project>',
         this.name || localize('Untitled'),
         serializer.app,
         serializer.version,
         this.notes || '',
         thumbdata,
+        this.scenes.asArray().indexOf(
+            this.currentScene) + 1,
         serializer.store(this.scenes.itemsArray())
     );
 };