feat(core): add initial view engine (#14014)
The new view engine allows our codegen to produce less code, as it can interpret view definitions during runtime. The view engine is not feature complete yet, but already allows to implement a tree benchmark based on it. Part of #14013
This commit is contained in:
Tobias Bosch
committed by
Alex Rickabaugh
Alex Rickabaugh
parent
9d8c467cb0
commit
2f87eb52fe
212
modules/@angular/core/src/view/element.ts
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212
modules/@angular/core/src/view/element.ts
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/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {SecurityContext} from '../security';
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import {BindingDef, BindingType, NodeData, NodeDef, NodeFlags, NodeType, ViewData, ViewFlags} from './types';
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import {checkAndUpdateBinding, setBindingDebugInfo} from './util';
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export function elementDef(
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flags: NodeFlags, childCount: number, name: string, fixedAttrs: {[name: string]: string} = {},
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bindings: ([BindingType.ElementClass, string] | [BindingType.ElementStyle, string, string] | [
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BindingType.ElementAttribute | BindingType.ElementProperty, string, SecurityContext
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])[] = []): NodeDef {
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const bindingDefs = new Array(bindings.length);
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for (let i = 0; i < bindings.length; i++) {
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const entry = bindings[i];
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let bindingDef: BindingDef;
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const bindingType = entry[0];
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const name = entry[1];
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let securityContext: SecurityContext;
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let suffix: string;
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switch (bindingType) {
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case BindingType.ElementStyle:
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suffix = <string>entry[2];
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break;
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case BindingType.ElementAttribute:
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case BindingType.ElementProperty:
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securityContext = <SecurityContext>entry[2];
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break;
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}
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bindingDefs[i] = {type: bindingType, name, nonMinfiedName: name, securityContext, suffix};
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}
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return {
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type: NodeType.Element,
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// will bet set by the view definition
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index: undefined,
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reverseChildIndex: undefined,
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parent: undefined,
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childFlags: undefined,
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bindingIndex: undefined,
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providerIndices: undefined,
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// regular values
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flags,
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childCount,
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bindings: bindingDefs,
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element: {name, attrs: fixedAttrs},
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provider: undefined,
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text: undefined,
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component: undefined,
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template: undefined
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};
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}
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export function createElement(view: ViewData, renderHost: any, def: NodeDef): NodeData {
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const parentNode = def.parent != null ? view.nodes[def.parent].renderNode : renderHost;
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const elDef = def.element;
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let el: any;
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if (view.renderer) {
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el = view.renderer.createElement(parentNode, elDef.name);
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if (elDef.attrs) {
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for (let attrName in elDef.attrs) {
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view.renderer.setElementAttribute(el, attrName, elDef.attrs[attrName]);
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}
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}
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} else {
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el = document.createElement(elDef.name);
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if (parentNode) {
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parentNode.appendChild(el);
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}
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if (elDef.attrs) {
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for (let attrName in elDef.attrs) {
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el.setAttribute(attrName, elDef.attrs[attrName]);
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}
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}
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}
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return {
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renderNode: el,
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provider: undefined,
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embeddedViews: (def.flags & NodeFlags.HasEmbeddedViews) ? [] : undefined,
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componentView: undefined
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};
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}
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export function checkAndUpdateElementInline(
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view: ViewData, def: NodeDef, v0: any, v1: any, v2: any, v3: any, v4: any, v5: any, v6: any,
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v7: any, v8: any, v9: any) {
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// Note: fallthrough is intended!
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switch (def.bindings.length) {
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case 10:
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checkAndUpdateElementValue(view, def, 9, v9);
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case 9:
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checkAndUpdateElementValue(view, def, 8, v8);
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case 8:
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checkAndUpdateElementValue(view, def, 7, v7);
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case 7:
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checkAndUpdateElementValue(view, def, 6, v6);
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case 6:
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checkAndUpdateElementValue(view, def, 5, v5);
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case 5:
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checkAndUpdateElementValue(view, def, 4, v4);
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case 4:
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checkAndUpdateElementValue(view, def, 3, v3);
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case 3:
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checkAndUpdateElementValue(view, def, 2, v2);
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case 2:
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checkAndUpdateElementValue(view, def, 1, v1);
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case 1:
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checkAndUpdateElementValue(view, def, 0, v0);
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}
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}
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export function checkAndUpdateElementDynamic(view: ViewData, def: NodeDef, values: any[]) {
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for (let i = 0; i < values.length; i++) {
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checkAndUpdateElementValue(view, def, i, values[i]);
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}
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}
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function checkAndUpdateElementValue(view: ViewData, def: NodeDef, bindingIdx: number, value: any) {
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if (!checkAndUpdateBinding(view, def, bindingIdx, value)) {
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return;
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}
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const binding = def.bindings[bindingIdx];
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const name = binding.name;
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const renderNode = view.nodes[def.index].renderNode;
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switch (binding.type) {
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case BindingType.ElementAttribute:
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setElementAttribute(view, binding, renderNode, name, value);
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break;
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case BindingType.ElementClass:
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setElementClass(view, renderNode, name, value);
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break;
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case BindingType.ElementStyle:
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setElementStyle(view, binding, renderNode, name, value);
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break;
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case BindingType.ElementProperty:
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setElementProperty(view, binding, renderNode, name, value);
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break;
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}
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}
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function setElementAttribute(
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view: ViewData, binding: BindingDef, renderNode: any, name: string, value: any) {
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const securityContext = binding.securityContext;
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let renderValue = securityContext ? view.services.sanitize(securityContext, value) : value;
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renderValue = renderValue != null ? renderValue.toString() : null;
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if (view.renderer) {
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view.renderer.setElementAttribute(renderNode, name, renderValue);
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} else {
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if (value != null) {
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renderNode.setAttribute(name, renderValue);
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} else {
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renderNode.removeAttribute(name);
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}
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}
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}
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function setElementClass(view: ViewData, renderNode: any, name: string, value: boolean) {
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if (view.renderer) {
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view.renderer.setElementClass(renderNode, name, value);
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} else {
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if (value) {
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renderNode.classList.add(name);
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} else {
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renderNode.classList.remove(name);
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}
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}
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}
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function setElementStyle(
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view: ViewData, binding: BindingDef, renderNode: any, name: string, value: any) {
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let renderValue = view.services.sanitize(SecurityContext.STYLE, value);
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if (renderValue != null) {
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renderValue = renderValue.toString();
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const unit = binding.suffix;
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if (unit != null) {
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renderValue = renderValue + unit;
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}
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} else {
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renderValue = null;
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}
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if (view.renderer) {
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view.renderer.setElementStyle(renderNode, name, renderValue);
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} else {
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if (renderValue != null) {
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renderNode.style[name] = renderValue;
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} else {
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// IE requires '' instead of null
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// see https://github.com/angular/angular/issues/7916
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(renderNode.style as any)[name] = '';
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}
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}
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}
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function setElementProperty(
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view: ViewData, binding: BindingDef, renderNode: any, name: string, value: any) {
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const securityContext = binding.securityContext;
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let renderValue = securityContext ? view.services.sanitize(securityContext, value) : value;
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if (view.renderer) {
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view.renderer.setElementProperty(renderNode, name, renderValue);
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if (view.def.flags & ViewFlags.LogBindingUpdate) {
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setBindingDebugInfo(view.renderer, renderNode, name, renderValue);
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}
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} else {
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renderNode[name] = renderValue;
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}
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}
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