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199 lines (168 loc) · 5.95 KB
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import {Type, isPresent, isBlank} from 'angular2/src/core/facade/lang';
import {ListWrapper, MapWrapper, Predicate} from 'angular2/src/core/facade/collection';
import {DOM} from 'angular2/src/core/dom/dom_adapter';
import {ElementInjector} from 'angular2/src/core/compiler/element_injector';
import {AppView} from 'angular2/src/core/compiler/view';
import {internalView} from 'angular2/src/core/compiler/view_ref';
import {ElementRef} from 'angular2/src/core/compiler/element_ref';
/**
* A DebugElement contains information from the Angular compiler about an
* element and provides access to the corresponding ElementInjector and
* underlying dom Element, as well as a way to query for children.
*/
export class DebugElement {
_elementInjector: ElementInjector;
/**
* @private
*/
constructor(private _parentView: AppView, private _boundElementIndex: number) {
this._elementInjector = this._parentView.elementInjectors[this._boundElementIndex];
}
get componentInstance(): any {
if (!isPresent(this._elementInjector)) {
return null;
}
return this._elementInjector.getComponent();
}
get nativeElement(): any { return this.elementRef.nativeElement; }
get elementRef(): ElementRef { return this._parentView.elementRefs[this._boundElementIndex]; }
getDirectiveInstance(directiveIndex: number): any {
return this._elementInjector.getDirectiveAtIndex(directiveIndex);
}
/**
* Get child DebugElements from within the Light DOM.
*
* @return {DebugElement[]}
*/
get children(): DebugElement[] {
return this._getChildElements(this._parentView, this._boundElementIndex);
}
/**
* Get the root DebugElement children of a component. Returns an empty
* list if the current DebugElement is not a component root.
*
* @return {DebugElement[]}
*/
get componentViewChildren(): DebugElement[] {
var shadowView = this._parentView.getNestedView(this._boundElementIndex);
if (!isPresent(shadowView)) {
// The current element is not a component.
return [];
}
return this._getChildElements(shadowView, null);
}
triggerEventHandler(eventName: string, eventObj: Event): void {
this._parentView.triggerEventHandlers(eventName, eventObj, this._boundElementIndex);
}
hasDirective(type: Type): boolean {
if (!isPresent(this._elementInjector)) {
return false;
}
return this._elementInjector.hasDirective(type);
}
inject(type: Type): any {
if (!isPresent(this._elementInjector)) {
return null;
}
return this._elementInjector.get(type);
}
getLocal(name: string): any { return this._parentView.locals.get(name); }
/**
* Return the first descendant TestElement matching the given predicate
* and scope.
*
* @param {Function: boolean} predicate
* @param {Scope} scope
*
* @return {DebugElement}
*/
query(predicate: Predicate<DebugElement>, scope: Function = Scope.all): DebugElement {
var results = this.queryAll(predicate, scope);
return results.length > 0 ? results[0] : null;
}
/**
* Return descendant TestElememts matching the given predicate
* and scope.
*
* @param {Function: boolean} predicate
* @param {Scope} scope
*
* @return {DebugElement[]}
*/
queryAll(predicate: Predicate<DebugElement>, scope: Function = Scope.all): DebugElement[] {
var elementsInScope = scope(this);
return ListWrapper.filter(elementsInScope, predicate);
}
_getChildElements(view: AppView, parentBoundElementIndex: number): DebugElement[] {
var els = [];
var parentElementBinder = null;
if (isPresent(parentBoundElementIndex)) {
parentElementBinder = view.proto.elementBinders[parentBoundElementIndex - view.elementOffset];
}
for (var i = 0; i < view.proto.elementBinders.length; ++i) {
var binder = view.proto.elementBinders[i];
if (binder.parent == parentElementBinder) {
els.push(new DebugElement(view, view.elementOffset + i));
var views = view.viewContainers[view.elementOffset + i];
if (isPresent(views)) {
ListWrapper.forEach(views.views, (nextView) => {
els = els.concat(this._getChildElements(nextView, null));
});
}
}
}
return els;
}
}
/**
* Returns a DebugElement for a ElementRef.
*
* @param {ElementRef}: elementRef
* @return {DebugElement}
*/
export function inspectElement(elementRef: ElementRef): DebugElement {
return new DebugElement(internalView(elementRef.parentView), elementRef.boundElementIndex);
}
export function asNativeElements(arr: DebugElement[]): any[] {
return arr.map((debugEl) => debugEl.nativeElement);
}
export class Scope {
static all(debugElement: DebugElement): DebugElement[] {
var scope = [];
scope.push(debugElement);
ListWrapper.forEach(debugElement.children,
(child) => { scope = scope.concat(Scope.all(child)); });
ListWrapper.forEach(debugElement.componentViewChildren,
(child) => { scope = scope.concat(Scope.all(child)); });
return scope;
}
static light(debugElement: DebugElement): DebugElement[] {
var scope = [];
ListWrapper.forEach(debugElement.children, (child) => {
scope.push(child);
scope = scope.concat(Scope.light(child));
});
return scope;
}
static view(debugElement: DebugElement): DebugElement[] {
var scope = [];
ListWrapper.forEach(debugElement.componentViewChildren, (child) => {
scope.push(child);
scope = scope.concat(Scope.light(child));
});
return scope;
}
}
export class By {
static all(): Function { return (debugElement) => true; }
static css(selector: string): Predicate<DebugElement> {
return (debugElement) => {
return isPresent(debugElement.nativeElement) ?
DOM.elementMatches(debugElement.nativeElement, selector) :
false;
};
}
static directive(type: Type): Predicate<DebugElement> {
return (debugElement) => { return debugElement.hasDirective(type); };
}
}