feat!: change gestures to look at selected when dragging

blocks/procedures.ts

@@ -38,6 +38,7 @@ import {config} from '../core/config.js';
 import {defineBlocks} from '../core/common.js';
 import '../core/icons/comment_icon.js';
 import '../core/icons/warning_icon.js';
+import * as common from '../core/common.js';
 
 /** A dictionary of the block definitions provided by this module. */
 export const blocks: {[key: string]: BlockDefinition} = {};
@@ -1157,7 +1158,7 @@ const PROCEDURE_CALL_COMMON = {
         const def = Procedures.getDefinition(name, workspace);
         if (def) {
           (workspace as WorkspaceSvg).centerOnBlock(def.id);
-          (def as BlockSvg).select();
+          common.setSelected(def as BlockSvg);
         }
       },
     });

core/block_svg.ts

@@ -241,56 +241,18 @@ export class BlockSvg
     return this.style.colourTertiary;
   }
 
-  /**
-   * Selects this block. Highlights the block visually and fires a select event
-   * if the block is not already selected.
-   */
+  /** Selects this block. Highlights the block visually. */
   select() {
     if (this.isShadow() && this.getParent()) {
       // Shadow blocks should not be selected.
       this.getParent()!.select();
       return;
     }
-    if (common.getSelected() === this) {
-      return;
-    }
-    let oldId = null;
-    if (common.getSelected()) {
-      oldId = common.getSelected()!.id;
-      // Unselect any previously selected block.
-      eventUtils.disable();
-      try {
-        common.getSelected()!.unselect();
-      } finally {
-        eventUtils.enable();
-      }
-    }
-    const event = new (eventUtils.get(eventUtils.SELECTED))(
-      oldId,
-      this.id,
-      this.workspace.id,
-    );
-    eventUtils.fire(event);
-    common.setSelected(this);
     this.addSelect();
   }
 
-  /**
-   * Unselects this block. Unhighlights the block and fires a select (false)
-   * event if the block is currently selected.
-   */
+  /** Unselects this block. Unhighlights the blockv visually.   */
   unselect() {
-    if (common.getSelected() !== this) {
-      return;
-    }
-    const event = new (eventUtils.get(eventUtils.SELECTED))(
-      this.id,
-      null,
-      this.workspace.id,
-    );
-    event.workspaceId = this.workspace.id;
-    eventUtils.fire(event);
-    common.setSelected(null);
     this.removeSelect();
   }
 

core/bubbles/bubble.ts

@@ -16,13 +16,16 @@ import {Rect} from '../utils/rect.js';
 import {Size} from '../utils/size.js';
 import {Svg} from '../utils/svg.js';
 import {WorkspaceSvg} from '../workspace_svg.js';
+import * as common from '../common.js';
+import {ISelectable} from '../blockly.js';
+import * as idGenerator from '../utils/idgenerator.js';
 
 /**
  * The abstract pop-up bubble class. This creates a UI that looks like a speech
  * bubble, where it has a "tail" that points to the block, and a "head" that
  * displays arbitrary svg elements.
  */
-export abstract class Bubble implements IBubble {
+export abstract class Bubble implements IBubble, ISelectable {
   /** The width of the border around the bubble. */
   static readonly BORDER_WIDTH = 6;
 
@@ -50,6 +53,8 @@ export abstract class Bubble implements IBubble {
   /** Distance between arrow point and anchor point. */
   static readonly ANCHOR_RADIUS = 8;
 
+  public id: string;
+
   /** The SVG group containing all parts of the bubble. */
   protected svgRoot: SVGGElement;
 
@@ -89,10 +94,11 @@ export abstract class Bubble implements IBubble {
    *     when automatically positioning.
    */
   constructor(
-    protected readonly workspace: WorkspaceSvg,
+    public readonly workspace: WorkspaceSvg,
     protected anchor: Coordinate,
     protected ownerRect?: Rect,
   ) {
+    this.id = idGenerator.getNextUniqueId();
     this.svgRoot = dom.createSvgElement(
       Svg.G,
       {'class': 'blocklyBubble'},
@@ -209,6 +215,7 @@ export abstract class Bubble implements IBubble {
   /** Passes the pointer event off to the gesture system. */
   private onMouseDown(e: PointerEvent) {
     this.workspace.getGesture(e)?.handleBubbleStart(e, this);
+    common.setSelected(this);
   }
 
   /** Positions the bubble relative to its anchor. Does not render its tail. */
@@ -640,4 +647,12 @@ export abstract class Bubble implements IBubble {
   revertDrag(): void {
     this.dragStrategy.revertDrag();
   }
+
+  select(): void {
+    // Bubbles don't have any visual for being selected.
+  }
+
+  unselect(): void {
+    // Bubbles don't have any visual for being selected.
+  }
 }

core/bubbles/mini_workspace_bubble.ts

@@ -47,7 +47,7 @@ export class MiniWorkspaceBubble extends Bubble {
   /** @internal */
   constructor(
     workspaceOptions: BlocklyOptions,
-    protected readonly workspace: WorkspaceSvg,
+    public readonly workspace: WorkspaceSvg,
     protected anchor: Coordinate,
     protected ownerRect?: Rect,
   ) {

core/bubbles/text_bubble.ts

@@ -20,7 +20,7 @@ export class TextBubble extends Bubble {
 
   constructor(
     private text: string,
-    protected readonly workspace: WorkspaceSvg,
+    public readonly workspace: WorkspaceSvg,
     protected anchor: Coordinate,
     protected ownerRect?: Rect,
   ) {

core/bubbles/textinput_bubble.ts

@@ -70,7 +70,7 @@ export class TextInputBubble extends Bubble {
    *     when automatically positioning.
    */
   constructor(
-    protected readonly workspace: WorkspaceSvg,
+    public readonly workspace: WorkspaceSvg,
     protected anchor: Coordinate,
     protected ownerRect?: Rect,
   ) {

core/clipboard/block_paster.ts

@@ -13,6 +13,7 @@ import {Coordinate} from '../utils/coordinate.js';
 import {WorkspaceSvg} from '../workspace_svg.js';
 import * as eventUtils from '../events/utils.js';
 import {config} from '../config.js';
+import * as common from '../common.js';
 
 export class BlockPaster implements IPaster<BlockCopyData, BlockSvg> {
   static TYPE = 'block';
@@ -43,7 +44,7 @@ export class BlockPaster implements IPaster<BlockCopyData, BlockSvg> {
     if (eventUtils.isEnabled() && !block.isShadow()) {
       eventUtils.fire(new (eventUtils.get(eventUtils.BLOCK_CREATE))(block));
     }
-    block.select();
+    common.setSelected(block);
     return block;
   }
 }

core/comments/rendered_workspace_comment.ts

@@ -16,10 +16,12 @@ import * as dom from '../utils/dom.js';
 import {IDraggable} from '../interfaces/i_draggable.js';
 import {CommentDragStrategy} from '../dragging/comment_drag_strategy.js';
 import * as browserEvents from '../browser_events.js';
+import * as common from '../common.js';
+import {ISelectable} from '../interfaces/i_selectable.js';
 
 export class RenderedWorkspaceComment
   extends WorkspaceComment
-  implements IBoundedElement, IRenderedElement, IDraggable
+  implements IBoundedElement, IRenderedElement, IDraggable, ISelectable
 {
   /** The class encompassing the svg elements making up the workspace comment. */
   private view: CommentView;
@@ -160,6 +162,7 @@ export class RenderedWorkspaceComment
     const gesture = this.workspace.getGesture(e);
     if (gesture) {
       gesture.handleCommentStart(e, this);
+      common.setSelected(this);
     }
   }
 
@@ -187,4 +190,8 @@ export class RenderedWorkspaceComment
   revertDrag(): void {
     this.dragStrategy.revertDrag();
   }
+
+  select(): void {}
+
+  unselect(): void {}
 }

core/common.ts

@@ -13,6 +13,7 @@ import {BlockDefinition, Blocks} from './blocks.js';
 import type {Connection} from './connection.js';
 import type {Workspace} from './workspace.js';
 import type {WorkspaceSvg} from './workspace_svg.js';
+import * as eventUtils from './events/utils.js';
 
 /** Database of all workspaces. */
 const WorkspaceDB_ = Object.create(null);
@@ -105,7 +106,18 @@ export function getSelected(): ISelectable | null {
  * @internal
  */
 export function setSelected(newSelection: ISelectable | null) {
+  if (selected === newSelection) return;
+
+  const event = new (eventUtils.get(eventUtils.SELECTED))(
+    selected?.id ?? null,
+    newSelection?.id ?? null,
+    newSelection?.workspace.id ?? selected?.workspace.id ?? '',
+  );
+  eventUtils.fire(event);
+
+  selected?.unselect();
   selected = newSelection;
+  selected?.select();
 }
 
 /**

core/contextmenu.ts

@@ -29,6 +29,7 @@ import * as WidgetDiv from './widgetdiv.js';
 import {WorkspaceCommentSvg} from './workspace_comment_svg.js';
 import type {WorkspaceSvg} from './workspace_svg.js';
 import * as Xml from './xml.js';
+import * as common from './common.js';
 
 /**
  * Which block is the context menu attached to?
@@ -261,7 +262,7 @@ export function callbackFactory(
     if (eventUtils.isEnabled() && !newBlock.isShadow()) {
       eventUtils.fire(new (eventUtils.get(eventUtils.BLOCK_CREATE))(newBlock));
     }
-    newBlock.select();
+    common.setSelected(newBlock);
     return newBlock;
   };
 }
@@ -374,7 +375,7 @@ export function workspaceCommentOption(
     if (ws.rendered) {
       comment.initSvg();
       comment.render();
-      comment.select();
+      common.setSelected(comment);
     }
   }
 

core/dragging/block_drag_strategy.ts

@@ -65,7 +65,10 @@ export class BlockDragStrategy implements IDragStrategy {
       this.block.isOwnMovable() &&
       !this.block.isShadow() &&
       !this.block.isDeadOrDying() &&
-      !this.workspace.options.readOnly
+      !this.workspace.options.readOnly &&
+      // We never drag blocks in the flyout, only create new blocks that are
+      // dragged.
+      !this.block.isInFlyout
     );
   }