feature: possibilities to merge blocks of different types

src/components/block/index.ts

@@ -549,9 +549,10 @@ export default class Block extends EventsDispatcher<BlockEvents> {
    * Call plugins merge method
    *
    * @param {BlockToolData} data - data to merge
+   * @param {string} type - type of the block to merge
    */
-  public async mergeWith(data: BlockToolData): Promise<void> {
-    await this.toolInstance.merge(data);
+  public async mergeWith(data: BlockToolData, type: string): Promise<void> {
+    await this.toolInstance.merge(data, type);
   }
 
   /**
@@ -994,4 +995,11 @@ export default class Block extends EventsDispatcher<BlockEvents> {
   private dropInputsCache(): void {
     this.cachedInputs = [];
   }
+
+  /**
+   * Get the list of mergeable blocks with the current block
+   */
+  public get mergeableWithBlocks(): string[]|undefined {
+    return this.tool.mergeableBlocks;
+  }
 }

src/components/modules/blockManager.ts

@@ -474,7 +474,7 @@ export default class BlockManager extends Module {
     const blockToMergeData = await blockToMerge.data;
 
     if (!_.isEmpty(blockToMergeData)) {
-      await targetBlock.mergeWith(blockToMergeData);
+      await targetBlock.mergeWith(blockToMergeData, targetBlock.name);
     }
 
     this.removeBlock(blockToMerge);

src/components/tools/base.ts

@@ -89,7 +89,9 @@ export enum InternalBlockToolSettings {
   /**
    * Tool paste config
    */
-  PasteConfig = 'pasteConfig'
+  PasteConfig = 'pasteConfig',
+
+  MergeableBlocks = 'mergeableBlocks'
 }
 
 /**

src/components/tools/block.ts

@@ -35,7 +35,7 @@ export default class BlockTool extends BaseTool<IBlockTool> {
   /**
    * Tool's constructable blueprint
    */
-  protected constructable: BlockToolConstructable;
+  public constructable: BlockToolConstructable;
 
   /**
    * Creates new Tool instance
@@ -212,4 +212,11 @@ export default class BlockTool extends BaseTool<IBlockTool> {
 
     return baseConfig;
   }
+
+  /**
+   *
+   */
+  public get mergeableBlocks(): string[]|undefined {
+    return this.constructable[InternalBlockToolSettings.MergeableBlocks];
+  }
 }

src/components/utils/blocks.ts

@@ -14,6 +14,10 @@ import { isFunction, isString, log } from '../utils';
  * @param blockToMerge - block to merge from
  */
 export function areBlocksMergeable(targetBlock: Block, blockToMerge: Block): boolean {
+  if (blockToMerge.mergeableWithBlocks?.includes(targetBlock.name)) {
+    return true;
+  }
+
   return targetBlock.mergeable && targetBlock.name === blockToMerge.name;
 }
 

types/tools/block-tool.d.ts

@@ -12,6 +12,12 @@ import { TunesMenuConfig } from './tool-settings';
  * @see {@link docs/tools.md}
  */
 export interface BlockTool extends BaseTool {
+
+  /**
+   * Block that can be merged with the block
+   */
+  mergeableBlocks?: string[];
+
   /**
    * Sanitizer rules description
    */
@@ -40,8 +46,9 @@ export interface BlockTool extends BaseTool {
    * Method that specified how to merge two Blocks with same type.
    * Called by backspace at the beginning of the Block
    * @param {BlockToolData} blockData
+   * @param {string} type
    */
-  merge?(blockData: BlockToolData): void;
+  merge?(blockData: BlockToolData, type: string): void;
 
   /**
    * On paste callback. Fired when pasted content can be substituted by a Tool
@@ -92,6 +99,12 @@ export interface BlockToolConstructorOptions<D extends object = any, C extends o
 }
 
 export interface BlockToolConstructable extends BaseToolConstructable {
+
+  /**
+   * Block types that can be merged with the block
+   */
+  mergeableBlocks?: string[];
+
   /**
    * Tool's Toolbox settings
    */