undelete sprites

HISTORY.md

@@ -2,6 +2,8 @@
 
 ## in development:
 
+* **New Features:**
+    * undelete sprites
 * **Notable Changes:**
     * optimized special cases for COMBINE (sum, product, min, max) by up to 34 x
     * custom block label parts inside the prototype (in the block editor) are now displayed the same as in block instances
@@ -12,6 +14,7 @@
 ### 2021-03-02
 * threads: optimized special cases for COMBINE (sum, product, min, max) by up to 34 x
 * threads: optimized special cases for compiled version of COMBINE
+* gui, objects: undelete sprites 
 
 ### 2021-03-01
 * byob: improved layout and rendering of (+) buttons in custom block prototypes

snap.html

@@ -10,7 +10,7 @@
         <script src="src/widgets.js?version=2021-01-05"></script>
         <script src="src/blocks.js?version=2021-02-27"></script>
         <script src="src/threads.js?version=2021-03-02"></script>
-        <script src="src/objects.js?version=2021-02-23"></script>
+        <script src="src/objects.js?version=2021-03-02"></script>
         <script src="src/gui.js?version=2021-02-27"></script>
         <script src="src/paint.js?version=2020-05-17"></script>
         <script src="src/lists.js?version=2021-02-20"></script>

src/gui.js

@@ -78,7 +78,7 @@ Animation, BoxMorph, BlockEditorMorph, BlockDialogMorph, Note, ZERO, BLACK*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.gui = '2021-February-27';
+modules.gui = '2021-March-02';
 
 // Declarations
 
@@ -235,6 +235,8 @@ IDE_Morph.prototype.init = function (isAutoFill) {
     this.projectName = '';
     this.projectNotes = '';
 
+    this.trash = []; // deleted sprites
+
     // logoURL is disabled because the image data is hard-copied
     // to avoid tainting the world canvas
     // this.logoURL = this.resourceURL('src', 'snap_logo_sm.png');
@@ -3071,6 +3073,9 @@ IDE_Morph.prototype.removeSprite = function (sprite) {
 
     this.selectSprite(this.currentSprite);
     this.recordUnsavedChanges();
+
+    // remember the deleted sprite so it can be recovered again later
+    this.trash.push(sprite);
 };
 
 IDE_Morph.prototype.newSoundName = function (name) {
@@ -3968,6 +3973,11 @@ IDE_Morph.prototype.projectMenu = function () {
         'Select a sound from the media library'
     );
 
+    if (this.trash.length) {
+        menu.addLine();
+        menu.addItem('Undelete...', 'undeleteSprites');
+    }
+
     menu.popup(world, pos);
 };
 
@@ -4230,6 +4240,41 @@ IDE_Morph.prototype.popupMediaImportDialog = function (folderName, items) {
     );
 };
 
+IDE_Morph.prototype.undeleteSprites = function () {
+    // pop up a menu showing deleted sprites that can be recovered
+    // by clicking on them
+    var menu = new MenuMorph(this.undelete, 'Undelete', this),
+        pos = this.controlBar.projectButton.bottomLeft();
+
+    this.trash.forEach(sprite =>
+        menu.addItem(
+            [
+                sprite.thumbnail(new Point(24, 24), null, true), // no corpse
+                sprite.name,
+            ],
+            sprite
+        )
+    );
+    menu.popup(this.world(), pos);
+};
+
+IDE_Morph.prototype.undelete = function (aSprite) {
+    var rnd = Process.prototype.reportBasicRandom;
+    aSprite.isCorpse = false;
+    aSprite.version = Date.now();
+    aSprite.name = this.newSpriteName(aSprite.name);
+    aSprite.setCenter(this.stage.center());
+    this.stage.add(aSprite);
+    aSprite.setXPosition(rnd.call(this, -100, 100));
+    aSprite.setYPosition(rnd.call(this, -100, 100));
+    aSprite.fixLayout();
+    aSprite.rerender();
+    this.sprites.add(aSprite);
+    this.corral.addSprite(aSprite);
+    this.selectSprite(aSprite);
+    this.trash = this.trash.filter(sprite => sprite.isCorpse);
+};
+
 // IDE_Morph menu actions
 
 IDE_Morph.prototype.aboutSnap = function () {

src/objects.js

@@ -84,7 +84,7 @@ BlockEditorMorph, BlockDialogMorph, PrototypeHatBlockMorph,  BooleanSlotMorph,
 localize, TableMorph, TableFrameMorph, normalizeCanvas, VectorPaintEditorMorph,
 AlignmentMorph, Process, WorldMap, copyCanvas, useBlurredShadows*/
 
-modules.objects = '2021-February-23';
+modules.objects = '2021-March-02';
 
 var SpriteMorph;
 var StageMorph;
@@ -7229,7 +7229,7 @@ SpriteMorph.prototype.inheritedMethods = function () {
 
 // SpriteMorph thumbnail
 
-SpriteMorph.prototype.thumbnail = function (extentPoint, recycleMe) {
+SpriteMorph.prototype.thumbnail = function (extentPoint, recycleMe, noCorpse) {
     // answer a new Canvas of extentPoint dimensions containing
     // my thumbnail representation keeping the originial aspect ratio
     // a "recycleMe canvas can be passed for re-use
@@ -7259,7 +7259,7 @@ SpriteMorph.prototype.thumbnail = function (extentPoint, recycleMe) {
     }
 
     ctx.save();
-    if (this.isCorpse) {
+    if (this.isCorpse && !noCorpse) {
         ctx.globalAlpha = 0.3;
     }
     if (w && h && src.width && src.height) {
@@ -7270,7 +7270,7 @@ SpriteMorph.prototype.thumbnail = function (extentPoint, recycleMe) {
             Math.floor(yOffset / scale)
         );
     }
-    if (this.isCorpse) {
+    if (this.isCorpse && !noCorpse) {
         ctx.restore();
         xOut('white', 0.8, 6);
         xOut('black', 0.8, 1);