@angular/core
Version:
Angular - the core framework
209 lines • 34 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 { invalidSkipHydrationHost, validateMatchingNode, validateNodeExists } from '../../hydration/error_handling';
import { locateNextRNode } from '../../hydration/node_lookup_utils';
import { hasSkipHydrationAttrOnRElement, hasSkipHydrationAttrOnTNode } from '../../hydration/skip_hydration';
import { getSerializedContainerViews, isDisconnectedNode, markRNodeAsClaimedByHydration, setSegmentHead } from '../../hydration/utils';
import { assertDefined, assertEqual, assertIndexInRange } from '../../util/assert';
import { assertFirstCreatePass, assertHasParent } from '../assert';
import { attachPatchData } from '../context_discovery';
import { registerPostOrderHooks } from '../hooks';
import { hasClassInput, hasStyleInput } from '../interfaces/node';
import { isComponentHost, isContentQueryHost, isDirectiveHost } from '../interfaces/type_checks';
import { HEADER_OFFSET, HYDRATION, RENDERER } from '../interfaces/view';
import { assertTNodeType } from '../node_assert';
import { appendChild, clearElementContents, createElementNode, setupStaticAttributes } from '../node_manipulation';
import { decreaseElementDepthCount, enterSkipHydrationBlock, getBindingIndex, getCurrentTNode, getElementDepthCount, getLView, getNamespace, getTView, increaseElementDepthCount, isCurrentTNodeParent, isInSkipHydrationBlock, isSkipHydrationRootTNode, lastNodeWasCreated, leaveSkipHydrationBlock, setCurrentTNode, setCurrentTNodeAsNotParent, wasLastNodeCreated } from '../state';
import { computeStaticStyling } from '../styling/static_styling';
import { getConstant } from '../util/view_utils';
import { validateElementIsKnown } from './element_validation';
import { setDirectiveInputsWhichShadowsStyling } from './property';
import { createDirectivesInstances, executeContentQueries, getOrCreateTNode, resolveDirectives, saveResolvedLocalsInData } from './shared';
function elementStartFirstCreatePass(index, tView, lView, name, attrsIndex, localRefsIndex) {
ngDevMode && assertFirstCreatePass(tView);
ngDevMode && ngDevMode.firstCreatePass++;
const tViewConsts = tView.consts;
const attrs = getConstant(tViewConsts, attrsIndex);
const tNode = getOrCreateTNode(tView, index, 2 /* TNodeType.Element */, name, attrs);
resolveDirectives(tView, lView, tNode, getConstant(tViewConsts, localRefsIndex));
if (tNode.attrs !== null) {
computeStaticStyling(tNode, tNode.attrs, false);
}
if (tNode.mergedAttrs !== null) {
computeStaticStyling(tNode, tNode.mergedAttrs, true);
}
if (tView.queries !== null) {
tView.queries.elementStart(tView, tNode);
}
return tNode;
}
/**
* Create DOM element. The instruction must later be followed by `elementEnd()` call.
*
* @param index Index of the element in the LView array
* @param name Name of the DOM Node
* @param attrsIndex Index of the element's attributes in the `consts` array.
* @param localRefsIndex Index of the element's local references in the `consts` array.
* @returns This function returns itself so that it may be chained.
*
* Attributes and localRefs are passed as an array of strings where elements with an even index
* hold an attribute name and elements with an odd index hold an attribute value, ex.:
* ['id', 'warning5', 'class', 'alert']
*
* @codeGenApi
*/
export function ɵɵelementStart(index, name, attrsIndex, localRefsIndex) {
const lView = getLView();
const tView = getTView();
const adjustedIndex = HEADER_OFFSET + index;
ngDevMode &&
assertEqual(getBindingIndex(), tView.bindingStartIndex, 'elements should be created before any bindings');
ngDevMode && assertIndexInRange(lView, adjustedIndex);
const renderer = lView[RENDERER];
const tNode = tView.firstCreatePass ?
elementStartFirstCreatePass(adjustedIndex, tView, lView, name, attrsIndex, localRefsIndex) :
tView.data[adjustedIndex];
const native = _locateOrCreateElementNode(tView, lView, tNode, renderer, name, index);
lView[adjustedIndex] = native;
const hasDirectives = isDirectiveHost(tNode);
if (ngDevMode && tView.firstCreatePass) {
validateElementIsKnown(native, lView, tNode.value, tView.schemas, hasDirectives);
}
setCurrentTNode(tNode, true);
setupStaticAttributes(renderer, native, tNode);
if ((tNode.flags & 32 /* TNodeFlags.isDetached */) !== 32 /* TNodeFlags.isDetached */ && wasLastNodeCreated()) {
// In the i18n case, the translation may have removed this element, so only add it if it is not
// detached. See `TNodeType.Placeholder` and `LFrame.inI18n` for more context.
appendChild(tView, lView, native, tNode);
}
// any immediate children of a component or template container must be pre-emptively
// monkey-patched with the component view data so that the element can be inspected
// later on using any element discovery utility methods (see `element_discovery.ts`)
if (getElementDepthCount() === 0) {
attachPatchData(native, lView);
}
increaseElementDepthCount();
if (hasDirectives) {
createDirectivesInstances(tView, lView, tNode);
executeContentQueries(tView, tNode, lView);
}
if (localRefsIndex !== null) {
saveResolvedLocalsInData(lView, tNode);
}
return ɵɵelementStart;
}
/**
* Mark the end of the element.
* @returns This function returns itself so that it may be chained.
*
* @codeGenApi
*/
export function ɵɵelementEnd() {
let currentTNode = getCurrentTNode();
ngDevMode && assertDefined(currentTNode, 'No parent node to close.');
if (isCurrentTNodeParent()) {
setCurrentTNodeAsNotParent();
}
else {
ngDevMode && assertHasParent(getCurrentTNode());
currentTNode = currentTNode.parent;
setCurrentTNode(currentTNode, false);
}
const tNode = currentTNode;
ngDevMode && assertTNodeType(tNode, 3 /* TNodeType.AnyRNode */);
if (isSkipHydrationRootTNode(tNode)) {
leaveSkipHydrationBlock();
}
decreaseElementDepthCount();
const tView = getTView();
if (tView.firstCreatePass) {
registerPostOrderHooks(tView, currentTNode);
if (isContentQueryHost(currentTNode)) {
tView.queries.elementEnd(currentTNode);
}
}
if (tNode.classesWithoutHost != null && hasClassInput(tNode)) {
setDirectiveInputsWhichShadowsStyling(tView, tNode, getLView(), tNode.classesWithoutHost, true);
}
if (tNode.stylesWithoutHost != null && hasStyleInput(tNode)) {
setDirectiveInputsWhichShadowsStyling(tView, tNode, getLView(), tNode.stylesWithoutHost, false);
}
return ɵɵelementEnd;
}
/**
* Creates an empty element using {@link elementStart} and {@link elementEnd}
*
* @param index Index of the element in the data array
* @param name Name of the DOM Node
* @param attrsIndex Index of the element's attributes in the `consts` array.
* @param localRefsIndex Index of the element's local references in the `consts` array.
* @returns This function returns itself so that it may be chained.
*
* @codeGenApi
*/
export function ɵɵelement(index, name, attrsIndex, localRefsIndex) {
ɵɵelementStart(index, name, attrsIndex, localRefsIndex);
ɵɵelementEnd();
return ɵɵelement;
}
let _locateOrCreateElementNode = (tView, lView, tNode, renderer, name, index) => {
lastNodeWasCreated(true);
return createElementNode(renderer, name, getNamespace());
};
/**
* Enables hydration code path (to lookup existing elements in DOM)
* in addition to the regular creation mode of element nodes.
*/
function locateOrCreateElementNodeImpl(tView, lView, tNode, renderer, name, index) {
const hydrationInfo = lView[HYDRATION];
const isNodeCreationMode = !hydrationInfo || isInSkipHydrationBlock() || isDisconnectedNode(hydrationInfo, index);
lastNodeWasCreated(isNodeCreationMode);
// Regular creation mode.
if (isNodeCreationMode) {
return createElementNode(renderer, name, getNamespace());
}
// Hydration mode, looking up an existing element in DOM.
const native = locateNextRNode(hydrationInfo, tView, lView, tNode);
ngDevMode && validateMatchingNode(native, Node.ELEMENT_NODE, name, lView, tNode);
ngDevMode && markRNodeAsClaimedByHydration(native);
// This element might also be an anchor of a view container.
if (getSerializedContainerViews(hydrationInfo, index)) {
// Important note: this element acts as an anchor, but it's **not** a part
// of the embedded view, so we start the segment **after** this element, taking
// a reference to the next sibling. For example, the following template:
// `<div #vcrTarget>` is represented in the DOM as `<div></div>...<!--container-->`,
// so while processing a `<div>` instruction, point to the next sibling as a
// start of a segment.
ngDevMode && validateNodeExists(native.nextSibling, lView, tNode);
setSegmentHead(hydrationInfo, index, native.nextSibling);
}
// Checks if the skip hydration attribute is present during hydration so we know to
// skip attempting to hydrate this block. We check both TNode and RElement for an
// attribute: the RElement case is needed for i18n cases, when we add it to host
// elements during the annotation phase (after all internal data structures are setup).
if (hydrationInfo &&
(hasSkipHydrationAttrOnTNode(tNode) || hasSkipHydrationAttrOnRElement(native))) {
if (isComponentHost(tNode)) {
enterSkipHydrationBlock(tNode);
// Since this isn't hydratable, we need to empty the node
// so there's no duplicate content after render
clearElementContents(native);
ngDevMode && ngDevMode.componentsSkippedHydration++;
}
else if (ngDevMode) {
// If this is not a component host, throw an error.
// Hydration can be skipped on per-component basis only.
throw invalidSkipHydrationHost(native);
}
}
return native;
}
export function enableLocateOrCreateElementNodeImpl() {
_locateOrCreateElementNode = locateOrCreateElementNodeImpl;
}
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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 */\n\nimport {invalidSkipHydrationHost, validateMatchingNode, validateNodeExists} from '../../hydration/error_handling';\nimport {locateNextRNode} from '../../hydration/node_lookup_utils';\nimport {hasSkipHydrationAttrOnRElement, hasSkipHydrationAttrOnTNode} from '../../hydration/skip_hydration';\nimport {getSerializedContainerViews, isDisconnectedNode, markRNodeAsClaimedByHydration, setSegmentHead} from '../../hydration/utils';\nimport {assertDefined, assertEqual, assertIndexInRange} from '../../util/assert';\nimport {assertFirstCreatePass, assertHasParent} from '../assert';\nimport {attachPatchData} from '../context_discovery';\nimport {registerPostOrderHooks} from '../hooks';\nimport {hasClassInput, hasStyleInput, TAttributes, TElementNode, TNode, TNodeFlags, TNodeType} from '../interfaces/node';\nimport {Renderer} from '../interfaces/renderer';\nimport {RElement} from '../interfaces/renderer_dom';\nimport {hasI18n, isComponentHost, isContentQueryHost, isDirectiveHost} from '../interfaces/type_checks';\nimport {HEADER_OFFSET, HYDRATION, LView, RENDERER, TView} from '../interfaces/view';\nimport {assertTNodeType} from '../node_assert';\nimport {appendChild, clearElementContents, createElementNode, setupStaticAttributes} from '../node_manipulation';\nimport {decreaseElementDepthCount, enterSkipHydrationBlock, getBindingIndex, getCurrentTNode, getElementDepthCount, getLView, getNamespace, getTView, increaseElementDepthCount, isCurrentTNodeParent, isInSkipHydrationBlock, isSkipHydrationRootTNode, lastNodeWasCreated, leaveSkipHydrationBlock, setCurrentTNode, setCurrentTNodeAsNotParent, wasLastNodeCreated} from '../state';\nimport {computeStaticStyling} from '../styling/static_styling';\nimport {getConstant} from '../util/view_utils';\n\nimport {validateElementIsKnown} from './element_validation';\nimport {setDirectiveInputsWhichShadowsStyling} from './property';\nimport {createDirectivesInstances, executeContentQueries, getOrCreateTNode, resolveDirectives, saveResolvedLocalsInData} from './shared';\n\n\nfunction elementStartFirstCreatePass(\n    index: number, tView: TView, lView: LView, name: string, attrsIndex?: number|null,\n    localRefsIndex?: number): TElementNode {\n  ngDevMode && assertFirstCreatePass(tView);\n  ngDevMode && ngDevMode.firstCreatePass++;\n\n  const tViewConsts = tView.consts;\n  const attrs = getConstant<TAttributes>(tViewConsts, attrsIndex);\n  const tNode = getOrCreateTNode(tView, index, TNodeType.Element, name, attrs);\n\n  resolveDirectives(tView, lView, tNode, getConstant<string[]>(tViewConsts, localRefsIndex));\n\n  if (tNode.attrs !== null) {\n    computeStaticStyling(tNode, tNode.attrs, false);\n  }\n\n  if (tNode.mergedAttrs !== null) {\n    computeStaticStyling(tNode, tNode.mergedAttrs, true);\n  }\n\n  if (tView.queries !== null) {\n    tView.queries.elementStart(tView, tNode);\n  }\n\n  return tNode;\n}\n\n/**\n * Create DOM element. The instruction must later be followed by `elementEnd()` call.\n *\n * @param index Index of the element in the LView array\n * @param name Name of the DOM Node\n * @param attrsIndex Index of the element's attributes in the `consts` array.\n * @param localRefsIndex Index of the element's local references in the `consts` array.\n * @returns This function returns itself so that it may be chained.\n *\n * Attributes and localRefs are passed as an array of strings where elements with an even index\n * hold an attribute name and elements with an odd index hold an attribute value, ex.:\n * ['id', 'warning5', 'class', 'alert']\n *\n * @codeGenApi\n */\nexport function ɵɵelementStart(\n    index: number, name: string, attrsIndex?: number|null,\n    localRefsIndex?: number): typeof ɵɵelementStart {\n  const lView = getLView();\n  const tView = getTView();\n  const adjustedIndex = HEADER_OFFSET + index;\n\n  ngDevMode &&\n      assertEqual(\n          getBindingIndex(), tView.bindingStartIndex,\n          'elements should be created before any bindings');\n  ngDevMode && assertIndexInRange(lView, adjustedIndex);\n\n  const renderer = lView[RENDERER];\n  const tNode = tView.firstCreatePass ?\n      elementStartFirstCreatePass(adjustedIndex, tView, lView, name, attrsIndex, localRefsIndex) :\n      tView.data[adjustedIndex] as TElementNode;\n\n  const native = _locateOrCreateElementNode(tView, lView, tNode, renderer, name, index);\n  lView[adjustedIndex] = native;\n\n  const hasDirectives = isDirectiveHost(tNode);\n\n  if (ngDevMode && tView.firstCreatePass) {\n    validateElementIsKnown(native, lView, tNode.value, tView.schemas, hasDirectives);\n  }\n\n  setCurrentTNode(tNode, true);\n  setupStaticAttributes(renderer, native, tNode);\n\n  if ((tNode.flags & TNodeFlags.isDetached) !== TNodeFlags.isDetached && wasLastNodeCreated()) {\n    // In the i18n case, the translation may have removed this element, so only add it if it is not\n    // detached. See `TNodeType.Placeholder` and `LFrame.inI18n` for more context.\n    appendChild(tView, lView, native, tNode);\n  }\n\n  // any immediate children of a component or template container must be pre-emptively\n  // monkey-patched with the component view data so that the element can be inspected\n  // later on using any element discovery utility methods (see `element_discovery.ts`)\n  if (getElementDepthCount() === 0) {\n    attachPatchData(native, lView);\n  }\n  increaseElementDepthCount();\n\n  if (hasDirectives) {\n    createDirectivesInstances(tView, lView, tNode);\n    executeContentQueries(tView, tNode, lView);\n  }\n  if (localRefsIndex !== null) {\n    saveResolvedLocalsInData(lView, tNode);\n  }\n  return ɵɵelementStart;\n}\n\n/**\n * Mark the end of the element.\n * @returns This function returns itself so that it may be chained.\n *\n * @codeGenApi\n */\nexport function ɵɵelementEnd(): typeof ɵɵelementEnd {\n  let currentTNode = getCurrentTNode()!;\n  ngDevMode && assertDefined(currentTNode, 'No parent node to close.');\n  if (isCurrentTNodeParent()) {\n    setCurrentTNodeAsNotParent();\n  } else {\n    ngDevMode && assertHasParent(getCurrentTNode());\n    currentTNode = currentTNode.parent!;\n    setCurrentTNode(currentTNode, false);\n  }\n\n  const tNode = currentTNode;\n  ngDevMode && assertTNodeType(tNode, TNodeType.AnyRNode);\n\n  if (isSkipHydrationRootTNode(tNode)) {\n    leaveSkipHydrationBlock();\n  }\n\n  decreaseElementDepthCount();\n\n  const tView = getTView();\n  if (tView.firstCreatePass) {\n    registerPostOrderHooks(tView, currentTNode);\n    if (isContentQueryHost(currentTNode)) {\n      tView.queries!.elementEnd(currentTNode);\n    }\n  }\n\n  if (tNode.classesWithoutHost != null && hasClassInput(tNode)) {\n    setDirectiveInputsWhichShadowsStyling(tView, tNode, getLView(), tNode.classesWithoutHost, true);\n  }\n\n  if (tNode.stylesWithoutHost != null && hasStyleInput(tNode)) {\n    setDirectiveInputsWhichShadowsStyling(tView, tNode, getLView(), tNode.stylesWithoutHost, false);\n  }\n  return ɵɵelementEnd;\n}\n\n/**\n * Creates an empty element using {@link elementStart} and {@link elementEnd}\n *\n * @param index Index of the element in the data array\n * @param name Name of the DOM Node\n * @param attrsIndex Index of the element's attributes in the `consts` array.\n * @param localRefsIndex Index of the element's local references in the `consts` array.\n * @returns This function returns itself so that it may be chained.\n *\n * @codeGenApi\n */\nexport function ɵɵelement(\n    index: number, name: string, attrsIndex?: number|null,\n    localRefsIndex?: number): typeof ɵɵelement {\n  ɵɵelementStart(index, name, attrsIndex, localRefsIndex);\n  ɵɵelementEnd();\n  return ɵɵelement;\n}\n\nlet _locateOrCreateElementNode: typeof locateOrCreateElementNodeImpl =\n    (tView: TView, lView: LView, tNode: TNode, renderer: Renderer, name: string, index: number) => {\n      lastNodeWasCreated(true);\n      return createElementNode(renderer, name, getNamespace());\n    };\n\n/**\n * Enables hydration code path (to lookup existing elements in DOM)\n * in addition to the regular creation mode of element nodes.\n */\nfunction locateOrCreateElementNodeImpl(\n    tView: TView, lView: LView, tNode: TNode, renderer: Renderer, name: string,\n    index: number): RElement {\n  const hydrationInfo = lView[HYDRATION];\n  const isNodeCreationMode =\n      !hydrationInfo || isInSkipHydrationBlock() || isDisconnectedNode(hydrationInfo, index);\n  lastNodeWasCreated(isNodeCreationMode);\n\n  // Regular creation mode.\n  if (isNodeCreationMode) {\n    return createElementNode(renderer, name, getNamespace());\n  }\n\n  // Hydration mode, looking up an existing element in DOM.\n  const native = locateNextRNode<RElement>(hydrationInfo, tView, lView, tNode)!;\n  ngDevMode && validateMatchingNode(native, Node.ELEMENT_NODE, name, lView, tNode);\n  ngDevMode && markRNodeAsClaimedByHydration(native);\n\n  // This element might also be an anchor of a view container.\n  if (getSerializedContainerViews(hydrationInfo, index)) {\n    // Important note: this element acts as an anchor, but it's **not** a part\n    // of the embedded view, so we start the segment **after** this element, taking\n    // a reference to the next sibling. For example, the following template:\n    // `<div #vcrTarget>` is represented in the DOM as `<div></div>...<!--container-->`,\n    // so while processing a `<div>` instruction, point to the next sibling as a\n    // start of a segment.\n    ngDevMode && validateNodeExists(native.nextSibling, lView, tNode);\n    setSegmentHead(hydrationInfo, index, native.nextSibling);\n  }\n\n  // Checks if the skip hydration attribute is present during hydration so we know to\n  // skip attempting to hydrate this block. We check both TNode and RElement for an\n  // attribute: the RElement case is needed for i18n cases, when we add it to host\n  // elements during the annotation phase (after all internal data structures are setup).\n  if (hydrationInfo &&\n      (hasSkipHydrationAttrOnTNode(tNode) || hasSkipHydrationAttrOnRElement(native))) {\n    if (isComponentHost(tNode)) {\n      enterSkipHydrationBlock(tNode);\n\n      // Since this isn't hydratable, we need to empty the node\n      // so there's no duplicate content after render\n      clearElementContents(native);\n\n      ngDevMode && ngDevMode.componentsSkippedHydration++;\n    } else if (ngDevMode) {\n      // If this is not a component host, throw an error.\n      // Hydration can be skipped on per-component basis only.\n      throw invalidSkipHydrationHost(native);\n    }\n  }\n  return native;\n}\n\nexport function enableLocateOrCreateElementNodeImpl() {\n  _locateOrCreateElementNode = locateOrCreateElementNodeImpl;\n}\n"]}