@angular/core
Version:
Angular - the core framework
114 lines • 17.3 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 { addToArray, removeFromArray } from '../util/array_utils';
import { Services } from './types';
import { declaredViewContainer, renderNode, visitRootRenderNodes } from './util';
export function attachEmbeddedView(parentView, elementData, viewIndex, view) {
let embeddedViews = elementData.viewContainer._embeddedViews;
if (viewIndex === null || viewIndex === undefined) {
viewIndex = embeddedViews.length;
}
view.viewContainerParent = parentView;
addToArray(embeddedViews, viewIndex, view);
attachProjectedView(elementData, view);
Services.dirtyParentQueries(view);
const prevView = viewIndex > 0 ? embeddedViews[viewIndex - 1] : null;
renderAttachEmbeddedView(elementData, prevView, view);
}
function attachProjectedView(vcElementData, view) {
const dvcElementData = declaredViewContainer(view);
if (!dvcElementData || dvcElementData === vcElementData ||
view.state & 16 /* IsProjectedView */) {
return;
}
// Note: For performance reasons, we
// - add a view to template._projectedViews only 1x throughout its lifetime,
// and remove it not until the view is destroyed.
// (hard, as when a parent view is attached/detached we would need to attach/detach all
// nested projected views as well, even across component boundaries).
// - don't track the insertion order of views in the projected views array
// (hard, as when the views of the same template are inserted different view containers)
view.state |= 16 /* IsProjectedView */;
let projectedViews = dvcElementData.template._projectedViews;
if (!projectedViews) {
projectedViews = dvcElementData.template._projectedViews = [];
}
projectedViews.push(view);
// Note: we are changing the NodeDef here as we cannot calculate
// the fact whether a template is used for projection during compilation.
markNodeAsProjectedTemplate(view.parent.def, view.parentNodeDef);
}
function markNodeAsProjectedTemplate(viewDef, nodeDef) {
if (nodeDef.flags & 4 /* ProjectedTemplate */) {
return;
}
viewDef.nodeFlags |= 4 /* ProjectedTemplate */;
nodeDef.flags |= 4 /* ProjectedTemplate */;
let parentNodeDef = nodeDef.parent;
while (parentNodeDef) {
parentNodeDef.childFlags |= 4 /* ProjectedTemplate */;
parentNodeDef = parentNodeDef.parent;
}
}
export function detachEmbeddedView(elementData, viewIndex) {
const embeddedViews = elementData.viewContainer._embeddedViews;
if (viewIndex == null || viewIndex >= embeddedViews.length) {
viewIndex = embeddedViews.length - 1;
}
if (viewIndex < 0) {
return null;
}
const view = embeddedViews[viewIndex];
view.viewContainerParent = null;
removeFromArray(embeddedViews, viewIndex);
// See attachProjectedView for why we don't update projectedViews here.
Services.dirtyParentQueries(view);
renderDetachView(view);
return view;
}
export function detachProjectedView(view) {
if (!(view.state & 16 /* IsProjectedView */)) {
return;
}
const dvcElementData = declaredViewContainer(view);
if (dvcElementData) {
const projectedViews = dvcElementData.template._projectedViews;
if (projectedViews) {
removeFromArray(projectedViews, projectedViews.indexOf(view));
Services.dirtyParentQueries(view);
}
}
}
export function moveEmbeddedView(elementData, oldViewIndex, newViewIndex) {
const embeddedViews = elementData.viewContainer._embeddedViews;
const view = embeddedViews[oldViewIndex];
removeFromArray(embeddedViews, oldViewIndex);
if (newViewIndex == null) {
newViewIndex = embeddedViews.length;
}
addToArray(embeddedViews, newViewIndex, view);
// Note: Don't need to change projectedViews as the order in there
// as always invalid...
Services.dirtyParentQueries(view);
renderDetachView(view);
const prevView = newViewIndex > 0 ? embeddedViews[newViewIndex - 1] : null;
renderAttachEmbeddedView(elementData, prevView, view);
return view;
}
function renderAttachEmbeddedView(elementData, prevView, view) {
const prevRenderNode = prevView ? renderNode(prevView, prevView.def.lastRenderRootNode) : elementData.renderElement;
const parentNode = view.renderer.parentNode(prevRenderNode);
const nextSibling = view.renderer.nextSibling(prevRenderNode);
// Note: We can't check if `nextSibling` is present, as on WebWorkers it will always be!
// However, browsers automatically do `appendChild` when there is no `nextSibling`.
visitRootRenderNodes(view, 2 /* InsertBefore */, parentNode, nextSibling, undefined);
}
export function renderDetachView(view) {
visitRootRenderNodes(view, 3 /* RemoveChild */, null, null, undefined);
}
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embeddedViews[viewIndex! - 1] : null;\n  renderAttachEmbeddedView(elementData, prevView, view);\n}\n\nfunction attachProjectedView(vcElementData: ElementData, view: ViewData) {\n  const dvcElementData = declaredViewContainer(view);\n  if (!dvcElementData || dvcElementData === vcElementData ||\n      view.state & ViewState.IsProjectedView) {\n    return;\n  }\n  // Note: For performance reasons, we\n  // - add a view to template._projectedViews only 1x throughout its lifetime,\n  //   and remove it not until the view is destroyed.\n  //   (hard, as when a parent view is attached/detached we would need to attach/detach all\n  //    nested projected views as well, even across component boundaries).\n  // - don't track the insertion order of views in the projected views array\n  //   (hard, as when the views of the same template are inserted different view containers)\n  view.state |= ViewState.IsProjectedView;\n  let projectedViews = dvcElementData.template._projectedViews;\n  if (!projectedViews) {\n    projectedViews = dvcElementData.template._projectedViews = [];\n  }\n  projectedViews.push(view);\n  // Note: we are changing the NodeDef here as we cannot calculate\n  // the fact whether a template is used for projection during compilation.\n  markNodeAsProjectedTemplate(view.parent!.def, view.parentNodeDef!);\n}\n\nfunction markNodeAsProjectedTemplate(viewDef: ViewDefinition, nodeDef: NodeDef) {\n  if (nodeDef.flags & NodeFlags.ProjectedTemplate) {\n    return;\n  }\n  viewDef.nodeFlags |= NodeFlags.ProjectedTemplate;\n  nodeDef.flags |= NodeFlags.ProjectedTemplate;\n  let parentNodeDef = nodeDef.parent;\n  while (parentNodeDef) {\n    parentNodeDef.childFlags |= NodeFlags.ProjectedTemplate;\n    parentNodeDef = parentNodeDef.parent;\n  }\n}\n\nexport function detachEmbeddedView(elementData: ElementData, viewIndex?: number): ViewData|null {\n  const embeddedViews = elementData.viewContainer!._embeddedViews;\n  if (viewIndex == null || viewIndex >= embeddedViews.length) {\n    viewIndex = embeddedViews.length - 1;\n  }\n  if (viewIndex < 0) {\n    return null;\n  }\n  const view = embeddedViews[viewIndex];\n  view.viewContainerParent = null;\n  removeFromArray(embeddedViews, viewIndex);\n\n  // See attachProjectedView for why we don't update projectedViews here.\n  Services.dirtyParentQueries(view);\n\n  renderDetachView(view);\n\n  return view;\n}\n\nexport function detachProjectedView(view: ViewData) {\n  if (!(view.state & ViewState.IsProjectedView)) {\n    return;\n  }\n  const dvcElementData = declaredViewContainer(view);\n  if (dvcElementData) {\n    const projectedViews = dvcElementData.template._projectedViews;\n    if (projectedViews) {\n      removeFromArray(projectedViews, projectedViews.indexOf(view));\n      Services.dirtyParentQueries(view);\n    }\n  }\n}\n\nexport function moveEmbeddedView(\n    elementData: ElementData, oldViewIndex: number, newViewIndex: number): ViewData {\n  const embeddedViews = elementData.viewContainer!._embeddedViews;\n  const view = embeddedViews[oldViewIndex];\n  removeFromArray(embeddedViews, oldViewIndex);\n  if (newViewIndex == null) {\n    newViewIndex = embeddedViews.length;\n  }\n  addToArray(embeddedViews, newViewIndex, view);\n\n  // Note: Don't need to change projectedViews as the order in there\n  // as always invalid...\n\n  Services.dirtyParentQueries(view);\n\n  renderDetachView(view);\n  const prevView = newViewIndex > 0 ? embeddedViews[newViewIndex - 1] : null;\n  renderAttachEmbeddedView(elementData, prevView, view);\n\n  return view;\n}\n\nfunction renderAttachEmbeddedView(\n    elementData: ElementData, prevView: ViewData|null, view: ViewData) {\n  const prevRenderNode =\n      prevView ? renderNode(prevView, prevView.def.lastRenderRootNode!) : elementData.renderElement;\n  const parentNode = view.renderer.parentNode(prevRenderNode);\n  const nextSibling = view.renderer.nextSibling(prevRenderNode);\n  // Note: We can't check if `nextSibling` is present, as on WebWorkers it will always be!\n  // However, browsers automatically do `appendChild` when there is no `nextSibling`.\n  visitRootRenderNodes(view, RenderNodeAction.InsertBefore, parentNode, nextSibling, undefined);\n}\n\nexport function renderDetachView(view: ViewData) {\n  visitRootRenderNodes(view, RenderNodeAction.RemoveChild, null, null, undefined);\n}\n"]}