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Merge pull request #3836 from tanhauhau/tanhauhau/dynamic-event-handler
feat dynamic event handler
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69 changes: 69 additions & 0 deletions
69
src/compiler/compile/render_dom/wrappers/Element/EventHandler.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| import EventHandler from '../../../nodes/EventHandler'; | ||
| import Wrapper from '../shared/Wrapper'; | ||
| import Block from '../../Block'; | ||
| import { b, x, p } from 'code-red'; | ||
|
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| const TRUE = x`true`; | ||
| const FALSE = x`false`; | ||
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| export default class EventHandlerWrapper { | ||
| node: EventHandler; | ||
| parent: Wrapper; | ||
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| constructor(node: EventHandler, parent: Wrapper) { | ||
| this.node = node; | ||
| this.parent = parent; | ||
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| if (!node.expression) { | ||
| this.parent.renderer.component.add_var({ | ||
| name: node.handler_name.name, | ||
| internal: true, | ||
| referenced: true, | ||
| }); | ||
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| this.parent.renderer.component.partly_hoisted.push(b` | ||
| function ${node.handler_name.name}(event) { | ||
| @bubble($$self, event); | ||
| } | ||
| `); | ||
| } | ||
| } | ||
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| get_snippet(block) { | ||
| const snippet = this.node.expression ? this.node.expression.manipulate(block) : x`#ctx.${this.node.handler_name}`; | ||
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| if (this.node.reassigned) { | ||
| block.maintain_context = true; | ||
| return x`function () { ${snippet}.apply(this, arguments); }`; | ||
| } | ||
| return snippet; | ||
| } | ||
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| render(block: Block, target: string) { | ||
| let snippet = this.get_snippet(block); | ||
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| if (this.node.modifiers.has('preventDefault')) snippet = x`@prevent_default(${snippet})`; | ||
| if (this.node.modifiers.has('stopPropagation')) snippet = x`@stop_propagation(${snippet})`; | ||
| if (this.node.modifiers.has('self')) snippet = x`@self(${snippet})`; | ||
|
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| const args = []; | ||
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| const opts = ['passive', 'once', 'capture'].filter(mod => this.node.modifiers.has(mod)); | ||
| if (opts.length) { | ||
| args.push((opts.length === 1 && opts[0] === 'capture') | ||
| ? TRUE | ||
| : x`{ ${opts.map(opt => p`${opt}: true`)} }`); | ||
| } else if (block.renderer.options.dev) { | ||
| args.push(FALSE); | ||
| } | ||
|
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| if (block.renderer.options.dev) { | ||
| args.push(this.node.modifiers.has('stopPropagation') ? TRUE : FALSE); | ||
| args.push(this.node.modifiers.has('preventDefault') ? TRUE : FALSE); | ||
| } | ||
|
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| block.event_listeners.push( | ||
| x`@listen(${target}, "${this.node.name}", ${snippet}, ${args})` | ||
| ); | ||
| } | ||
| } |
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33 changes: 2 additions & 31 deletions
33
src/compiler/compile/render_dom/wrappers/shared/add_event_handlers.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,39 +1,10 @@ | ||
| import Block from '../../Block'; | ||
| import EventHandler from '../../../nodes/EventHandler'; | ||
| import { x, p } from 'code-red'; | ||
|
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| const TRUE = x`true`; | ||
| const FALSE = x`false`; | ||
| import EventHandler from '../Element/EventHandler'; | ||
|
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| export default function add_event_handlers( | ||
| block: Block, | ||
| target: string, | ||
| handlers: EventHandler[] | ||
| ) { | ||
| handlers.forEach(handler => { | ||
| let snippet = handler.render(block); | ||
| if (handler.modifiers.has('preventDefault')) snippet = x`@prevent_default(${snippet})`; | ||
| if (handler.modifiers.has('stopPropagation')) snippet = x`@stop_propagation(${snippet})`; | ||
| if (handler.modifiers.has('self')) snippet = x`@self(${snippet})`; | ||
|
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| const args = []; | ||
|
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| const opts = ['passive', 'once', 'capture'].filter(mod => handler.modifiers.has(mod)); | ||
| if (opts.length) { | ||
| args.push((opts.length === 1 && opts[0] === 'capture') | ||
| ? TRUE | ||
| : x`{ ${opts.map(opt => p`${opt}: true`)} }`); | ||
| } else if (block.renderer.options.dev) { | ||
| args.push(FALSE); | ||
| } | ||
|
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| if (block.renderer.options.dev) { | ||
| args.push(handler.modifiers.has('stopPropagation') ? TRUE : FALSE); | ||
| args.push(handler.modifiers.has('preventDefault') ? TRUE : FALSE); | ||
| } | ||
|
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| block.event_listeners.push( | ||
| x`@listen(${target}, "${handler.name}", ${snippet}, ${args})` | ||
| ); | ||
| }); | ||
| handlers.forEach(handler => handler.render(block, target)); | ||
| } |
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