@angular/core
Version:
Angular - the core framework
113 lines • 16.3 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { assertEqual, assertIndexInRange } from '../../util/assert';
import { assertHasParent } from '../assert';
import { attachPatchData } from '../context_discovery';
import { registerPostOrderHooks } from '../hooks';
import { isContentQueryHost, isDirectiveHost } from '../interfaces/type_checks';
import { HEADER_OFFSET, RENDERER } from '../interfaces/view';
import { assertTNodeType } from '../node_assert';
import { appendChild } from '../node_manipulation';
import { getBindingIndex, getCurrentTNode, getLView, getTView, isCurrentTNodeParent, setCurrentTNode, setCurrentTNodeAsNotParent } from '../state';
import { computeStaticStyling } from '../styling/static_styling';
import { getConstant } from '../util/view_utils';
import { createDirectivesInstances, executeContentQueries, getOrCreateTNode, resolveDirectives, saveResolvedLocalsInData } from './shared';
function elementContainerStartFirstCreatePass(index, tView, lView, attrsIndex, localRefsIndex) {
ngDevMode && ngDevMode.firstCreatePass++;
const tViewConsts = tView.consts;
const attrs = getConstant(tViewConsts, attrsIndex);
const tNode = getOrCreateTNode(tView, index, 8 /* ElementContainer */, 'ng-container', attrs);
// While ng-container doesn't necessarily support styling, we use the style context to identify
// and execute directives on the ng-container.
if (attrs !== null) {
computeStaticStyling(tNode, attrs, true);
}
const localRefs = getConstant(tViewConsts, localRefsIndex);
resolveDirectives(tView, lView, tNode, localRefs);
if (tView.queries !== null) {
tView.queries.elementStart(tView, tNode);
}
return tNode;
}
/**
* Creates a logical container for other nodes (<ng-container>) backed by a comment node in the DOM.
* The instruction must later be followed by `elementContainerEnd()` call.
*
* @param index Index of the element in the LView array
* @param attrsIndex Index of the container attributes in the `consts` array.
* @param localRefsIndex Index of the container's local references in the `consts` array.
*
* Even if this instruction accepts a set of attributes no actual attribute values are propagated to
* the DOM (as a comment node can't have attributes). Attributes are here only for directive
* matching purposes and setting initial inputs of directives.
*
* @codeGenApi
*/
export function ɵɵelementContainerStart(index, attrsIndex, localRefsIndex) {
const lView = getLView();
const tView = getTView();
const adjustedIndex = index + HEADER_OFFSET;
ngDevMode && assertIndexInRange(lView, adjustedIndex);
ngDevMode &&
assertEqual(getBindingIndex(), tView.bindingStartIndex, 'element containers should be created before any bindings');
const tNode = tView.firstCreatePass ?
elementContainerStartFirstCreatePass(adjustedIndex, tView, lView, attrsIndex, localRefsIndex) :
tView.data[adjustedIndex];
setCurrentTNode(tNode, true);
ngDevMode && ngDevMode.rendererCreateComment++;
const native = lView[adjustedIndex] =
lView[RENDERER].createComment(ngDevMode ? 'ng-container' : '');
appendChild(tView, lView, native, tNode);
attachPatchData(native, lView);
if (isDirectiveHost(tNode)) {
createDirectivesInstances(tView, lView, tNode);
executeContentQueries(tView, tNode, lView);
}
if (localRefsIndex != null) {
saveResolvedLocalsInData(lView, tNode);
}
}
/**
* Mark the end of the <ng-container>.
*
* @codeGenApi
*/
export function ɵɵelementContainerEnd() {
let currentTNode = getCurrentTNode();
const tView = getTView();
if (isCurrentTNodeParent()) {
setCurrentTNodeAsNotParent();
}
else {
ngDevMode && assertHasParent(currentTNode);
currentTNode = currentTNode.parent;
setCurrentTNode(currentTNode, false);
}
ngDevMode && assertTNodeType(currentTNode, 8 /* ElementContainer */);
if (tView.firstCreatePass) {
registerPostOrderHooks(tView, currentTNode);
if (isContentQueryHost(currentTNode)) {
tView.queries.elementEnd(currentTNode);
}
}
}
/**
* Creates an empty logical container using {@link elementContainerStart}
* and {@link elementContainerEnd}
*
* @param index Index of the element in the LView array
* @param attrsIndex Index of the container attributes in the `consts` array.
* @param localRefsIndex Index of the container's local references in the `consts` array.
*
* @codeGenApi
*/
export function ɵɵelementContainer(index, attrsIndex, localRefsIndex) {
ɵɵelementContainerStart(index, attrsIndex, localRefsIndex);
ɵɵelementContainerEnd();
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\nimport {assertEqual, assertIndexInRange} from '../../util/assert';\nimport {assertHasParent} from '../assert';\nimport {attachPatchData} from '../context_discovery';\nimport {registerPostOrderHooks} from '../hooks';\nimport {TAttributes, TElementContainerNode, TNodeType} from '../interfaces/node';\nimport {isContentQueryHost, isDirectiveHost} from '../interfaces/type_checks';\nimport {HEADER_OFFSET, LView, RENDERER, T_HOST, TView} from '../interfaces/view';\nimport {assertTNodeType} from '../node_assert';\nimport {appendChild} from '../node_manipulation';\nimport {getBindingIndex, getCurrentTNode, getLView, getTView, isCurrentTNodeParent, setCurrentTNode, setCurrentTNodeAsNotParent} from '../state';\nimport {computeStaticStyling} from '../styling/static_styling';\nimport {getConstant} from '../util/view_utils';\n\nimport {createDirectivesInstances, executeContentQueries, getOrCreateTNode, resolveDirectives, saveResolvedLocalsInData} from './shared';\n\nfunction elementContainerStartFirstCreatePass(\n    index: number, tView: TView, lView: LView, attrsIndex?: number|null,\n    localRefsIndex?: number): TElementContainerNode {\n  ngDevMode && ngDevMode.firstCreatePass++;\n\n  const tViewConsts = tView.consts;\n  const attrs = getConstant<TAttributes>(tViewConsts, attrsIndex);\n  const tNode = getOrCreateTNode(tView, index, TNodeType.ElementContainer, 'ng-container', attrs);\n\n  // While ng-container doesn't necessarily support styling, we use the style context to identify\n  // and execute directives on the ng-container.\n  if (attrs !== null) {\n    computeStaticStyling(tNode, attrs, true);\n  }\n\n  const localRefs = getConstant<string[]>(tViewConsts, localRefsIndex);\n  resolveDirectives(tView, lView, tNode, localRefs);\n\n  if (tView.queries !== null) {\n    tView.queries.elementStart(tView, tNode);\n  }\n\n  return tNode;\n}\n\n/**\n * Creates a logical container for other nodes (<ng-container>) backed by a comment node in the DOM.\n * The instruction must later be followed by `elementContainerEnd()` call.\n *\n * @param index Index of the element in the LView array\n * @param attrsIndex Index of the container attributes in the `consts` array.\n * @param localRefsIndex Index of the container's local references in the `consts` array.\n *\n * Even if this instruction accepts a set of attributes no actual attribute values are propagated to\n * the DOM (as a comment node can't have attributes). Attributes are here only for directive\n * matching purposes and setting initial inputs of directives.\n *\n * @codeGenApi\n */\nexport function ɵɵelementContainerStart(\n    index: number, attrsIndex?: number|null, localRefsIndex?: number): void {\n  const lView = getLView();\n  const tView = getTView();\n  const adjustedIndex = index + HEADER_OFFSET;\n\n  ngDevMode && assertIndexInRange(lView, adjustedIndex);\n  ngDevMode &&\n      assertEqual(\n          getBindingIndex(), tView.bindingStartIndex,\n          'element containers should be created before any bindings');\n\n  const tNode = tView.firstCreatePass ?\n      elementContainerStartFirstCreatePass(\n          adjustedIndex, tView, lView, attrsIndex, localRefsIndex) :\n      tView.data[adjustedIndex] as TElementContainerNode;\n  setCurrentTNode(tNode, true);\n\n  ngDevMode && ngDevMode.rendererCreateComment++;\n  const native = lView[adjustedIndex] =\n      lView[RENDERER].createComment(ngDevMode ? 'ng-container' : '');\n  appendChild(tView, lView, native, tNode);\n  attachPatchData(native, lView);\n\n  if (isDirectiveHost(tNode)) {\n    createDirectivesInstances(tView, lView, tNode);\n    executeContentQueries(tView, tNode, lView);\n  }\n\n  if (localRefsIndex != null) {\n    saveResolvedLocalsInData(lView, tNode);\n  }\n}\n\n/**\n * Mark the end of the <ng-container>.\n *\n * @codeGenApi\n */\nexport function ɵɵelementContainerEnd(): void {\n  let currentTNode = getCurrentTNode()!;\n  const tView = getTView();\n  if (isCurrentTNodeParent()) {\n    setCurrentTNodeAsNotParent();\n  } else {\n    ngDevMode && assertHasParent(currentTNode);\n    currentTNode = currentTNode.parent!;\n    setCurrentTNode(currentTNode, false);\n  }\n\n  ngDevMode && assertTNodeType(currentTNode, TNodeType.ElementContainer);\n\n  if (tView.firstCreatePass) {\n    registerPostOrderHooks(tView, currentTNode);\n    if (isContentQueryHost(currentTNode)) {\n      tView.queries!.elementEnd(currentTNode);\n    }\n  }\n}\n\n/**\n * Creates an empty logical container using {@link elementContainerStart}\n * and {@link elementContainerEnd}\n *\n * @param index Index of the element in the LView array\n * @param attrsIndex Index of the container attributes in the `consts` array.\n * @param localRefsIndex Index of the container's local references in the `consts` array.\n *\n * @codeGenApi\n */\nexport function ɵɵelementContainer(\n    index: number, attrsIndex?: number|null, localRefsIndex?: number): void {\n  ɵɵelementContainerStart(index, attrsIndex, localRefsIndex);\n  ɵɵelementContainerEnd();\n}\n"]}