Merge pull request #2608 from thollander/feat/abstract-block-class

Create a new abstraction level to handle `Block`

src/compile/nodes/CatchBlock.ts

@@ -1,12 +1,9 @@
-import Node from './shared/Node';
-import Block from '../render-dom/Block';
 import map_children from './shared/map_children';
 import TemplateScope from './shared/TemplateScope';
+import AbstractBlock from './shared/AbstractBlock';
 
-export default class CatchBlock extends Node {
-	block: Block;
+export default class CatchBlock extends AbstractBlock {
 	scope: TemplateScope;
-	children: Node[];
 
 	constructor(component, parent, scope, info) {
 		super(component, parent, scope, info);

src/compile/nodes/EachBlock.ts

@@ -1,9 +1,9 @@
 import Node from './shared/Node';
 import ElseBlock from './ElseBlock';
-import Block from '../render-dom/Block';
 import Expression from './shared/Expression';
 import map_children from './shared/map_children';
 import TemplateScope from './shared/TemplateScope';
+import AbstractBlock from './shared/AbstractBlock';
 import { Node as INode } from '../../interfaces';
 
 function unpack_destructuring(contexts: Array<{ name: string, tail: string }>, node: INode, tail: string) {
@@ -25,10 +25,9 @@ function unpack_destructuring(contexts: Array<{ name: string, tail: string }>, n
 	}
 }
 
-export default class EachBlock extends Node {
+export default class EachBlock extends AbstractBlock {
 	type: 'EachBlock';
 
-	block: Block;
 	expression: Expression;
 	context_node: Node;
 
@@ -41,7 +40,6 @@ export default class EachBlock extends Node {
 	has_animation: boolean;
 	has_binding = false;
 
-	children: Node[];
 	else?: ElseBlock;
 
 	constructor(component, parent, scope, info) {
@@ -85,7 +83,7 @@ export default class EachBlock extends Node {
 			}
 		}
 
-		this.warn_if_empty_block(); // TODO would be better if EachBlock, IfBlock etc extended an abstract Block class
+		this.warn_if_empty_block();
 
 		this.else = info.else
 			? new ElseBlock(component, this, this.scope, info.else)

src/compile/nodes/ElseBlock.ts

@@ -1,11 +1,8 @@
-import Node from './shared/Node';
-import Block from '../render-dom/Block';
 import map_children from './shared/map_children';
+import AbstractBlock from './shared/AbstractBlock';
 
-export default class ElseBlock extends Node {
+export default class ElseBlock extends AbstractBlock {
 	type: 'ElseBlock';
-	children: Node[];
-	block: Block;
 
 	constructor(component, parent, scope, info) {
 		super(component, parent, scope, info);

src/compile/nodes/IfBlock.ts

@@ -1,17 +1,13 @@
-import Node from './shared/Node';
 import ElseBlock from './ElseBlock';
-import Block from '../render-dom/Block';
 import Expression from './shared/Expression';
 import map_children from './shared/map_children';
+import AbstractBlock from './shared/AbstractBlock';
 
-export default class IfBlock extends Node {
+export default class IfBlock extends AbstractBlock {
 	type: 'IfBlock';
 	expression: Expression;
-	children: any[];
 	else: ElseBlock;
 
-	block: Block;
-
 	constructor(component, parent, scope, info) {
 		super(component, parent, scope, info);
 

src/compile/nodes/PendingBlock.ts

@@ -1,10 +1,7 @@
-import Node from './shared/Node';
-import Block from '../render-dom/Block';
 import map_children from './shared/map_children';
+import AbstractBlock from './shared/AbstractBlock';
 
-export default class PendingBlock extends Node {
-	block: Block;
-	children: Node[];
+export default class PendingBlock extends AbstractBlock {
 
 	constructor(component, parent, scope, info) {
 		super(component, parent, scope, info);

src/compile/nodes/ThenBlock.ts

@@ -1,12 +1,9 @@
-import Node from './shared/Node';
-import Block from '../render-dom/Block';
 import map_children from './shared/map_children';
 import TemplateScope from './shared/TemplateScope';
+import AbstractBlock from './shared/AbstractBlock';
 
-export default class ThenBlock extends Node {
-	block: Block;
+export default class ThenBlock extends AbstractBlock {
 	scope: TemplateScope;
-	children: Node[];
 
 	constructor(component, parent, scope, info) {
 		super(component, parent, scope, info);

src/compile/nodes/shared/AbstractBlock.ts

@@ -0,0 +1,25 @@
+import Block from '../../render-dom/Block';
+import Component from './../../Component';
+import Node from './Node';
+
+export default class AbstractBlock extends Node {
+	block: Block;
+	children: Node[];
+
+	constructor(component: Component, parent, scope, info: any) {
+		super(component, parent, scope, info);
+	}
+
+	warn_if_empty_block() {
+		if (!this.children || this.children.length > 1) return;
+
+		const child = this.children[0];
+
+		if (!child || (child.type === 'Text' && !/[^ \r\n\f\v\t]/.test(child.data))) {
+			this.component.warn(this, {
+				code: 'empty-block',
+				message: 'Empty block'
+			});
+		}
+	}
+}

src/compile/nodes/shared/Node.ts

@@ -1,3 +1,4 @@
+import Attribute from './../Attribute';
 import Component from './../../Component';
 
 export default class Node {
@@ -12,6 +13,7 @@ export default class Node {
 
 	can_use_innerhtml: boolean;
 	var: string;
+	attributes: Attribute[];
 
 	constructor(component: Component, parent, scope, info: any) {
 		this.start = info.start;
@@ -64,18 +66,4 @@ export default class Node {
 			this.parent.type === type || this.parent.has_ancestor(type) :
 			false;
 	}
-
-	warn_if_empty_block() {
-		if (!/Block$/.test(this.type) || !this.children) return;
-		if (this.children.length > 1) return;
-
-		const child = this.children[0];
-
-		if (!child || (child.type === 'Text' && !/[^ \r\n\f\v\t]/.test(child.data))) {
-			this.component.warn(this, {
-				code: 'empty-block',
-				message: 'Empty block'
-			});
-		}
-	}
 }