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refactor(common): cleanup directives

This commit is contained in:
Victor Berchet 2016-09-08 19:25:25 -07:00
parent 53f0c2206d
commit c649a5c5ab
6 changed files with 57 additions and 67 deletions
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34
modules/@angular/common/src/directives/ng_for.ts
View File

@ -8,7 +8,7 @@
import {ChangeDetectorRef, CollectionChangeRecord, DefaultIterableDiffer, Directive, DoCheck, EmbeddedViewRef, Input, IterableDiffer, IterableDiffers, OnChanges, SimpleChanges, TemplateRef, TrackByFn, ViewContainerRef} from '@angular/core';
import {getTypeNameForDebugging, isBlank, isPresent} from '../facade/lang';
import {getTypeNameForDebugging} from '../facade/lang';
export class NgForRow {
constructor(public $implicit: any, public index: number, public count: number) {}
@ -91,16 +91,16 @@ export class NgFor implements DoCheck, OnChanges {
@Input() ngForOf: any;
@Input() ngForTrackBy: TrackByFn;
private _differ: IterableDiffer;
private _differ: IterableDiffer = null;
constructor(
private _viewContainer: ViewContainerRef, private _templateRef: TemplateRef<NgForRow>,
private _iterableDiffers: IterableDiffers, private _cdr: ChangeDetectorRef) {}
private _viewContainer: ViewContainerRef, private _template: TemplateRef<NgForRow>,
private _differs: IterableDiffers, private _cdr: ChangeDetectorRef) {}
@Input()
set ngForTemplate(value: TemplateRef<NgForRow>) {
if (isPresent(value)) {
this._templateRef = value;
if (value) {
this._template = value;
}
}
@ -108,9 +108,9 @@ export class NgFor implements DoCheck, OnChanges {
if ('ngForOf' in changes) {
// React on ngForOf changes only once all inputs have been initialized
const value = changes['ngForOf'].currentValue;
if (isBlank(this._differ) && isPresent(value)) {
if (!this._differ && value) {
try {
this._differ = this._iterableDiffers.find(value).create(this._cdr, this.ngForTrackBy);
this._differ = this._differs.find(value).create(this._cdr, this.ngForTrackBy);
} catch (e) {
throw new Error(
`Cannot find a differ supporting object '${value}' of type '${getTypeNameForDebugging(value)}'. NgFor only supports binding to Iterables such as Arrays.`);
@ -120,9 +120,9 @@ export class NgFor implements DoCheck, OnChanges {
}
ngDoCheck() {
if (isPresent(this._differ)) {
if (this._differ) {
const changes = this._differ.diff(this.ngForOf);
if (isPresent(changes)) this._applyChanges(changes);
if (changes) this._applyChanges(changes);
}
}
@ -131,16 +131,16 @@ export class NgFor implements DoCheck, OnChanges {
changes.forEachOperation(
(item: CollectionChangeRecord, adjustedPreviousIndex: number, currentIndex: number) => {
if (item.previousIndex == null) {
let view = this._viewContainer.createEmbeddedView(
this._templateRef, new NgForRow(null, null, null), currentIndex);
let tuple = new RecordViewTuple(item, view);
const view = this._viewContainer.createEmbeddedView(
this._template, new NgForRow(null, null, null), currentIndex);
const tuple = new RecordViewTuple(item, view);
insertTuples.push(tuple);
} else if (currentIndex == null) {
this._viewContainer.remove(adjustedPreviousIndex);
} else {
let view = this._viewContainer.get(adjustedPreviousIndex);
const view = this._viewContainer.get(adjustedPreviousIndex);
this._viewContainer.move(view, currentIndex);
let tuple = new RecordViewTuple(item, <EmbeddedViewRef<NgForRow>>view);
const tuple = new RecordViewTuple(item, <EmbeddedViewRef<NgForRow>>view);
insertTuples.push(tuple);
}
});
@ -150,13 +150,13 @@ export class NgFor implements DoCheck, OnChanges {
}
for (let i = 0, ilen = this._viewContainer.length; i < ilen; i++) {
var viewRef = <EmbeddedViewRef<NgForRow>>this._viewContainer.get(i);
let viewRef = <EmbeddedViewRef<NgForRow>>this._viewContainer.get(i);
viewRef.context.index = i;
viewRef.context.count = ilen;
}
changes.forEachIdentityChange((record: any) => {
var viewRef = <EmbeddedViewRef<NgForRow>>this._viewContainer.get(record.currentIndex);
let viewRef = <EmbeddedViewRef<NgForRow>>this._viewContainer.get(record.currentIndex);
viewRef.context.$implicit = record.item;
});
}

21
modules/@angular/common/src/directives/ng_if.ts
View File

@ -8,10 +8,6 @@
import {Directive, Input, TemplateRef, ViewContainerRef} from '@angular/core';
import {isBlank} from '../facade/lang';
/**
* Removes or recreates a portion of the DOM tree based on an {expression}.
*
@ -38,18 +34,17 @@ import {isBlank} from '../facade/lang';
*/
@Directive({selector: '[ngIf]'})
export class NgIf {
private _prevCondition: boolean = null;
private _hasView: boolean = false;
constructor(private _viewContainer: ViewContainerRef, private _templateRef: TemplateRef<Object>) {
}
constructor(private _viewContainer: ViewContainerRef, private _template: TemplateRef<Object>) {}
@Input()
set ngIf(newCondition: any) {
if (newCondition && (isBlank(this._prevCondition) || !this._prevCondition)) {
this._prevCondition = true;
this._viewContainer.createEmbeddedView(this._templateRef);
} else if (!newCondition && (isBlank(this._prevCondition) || this._prevCondition)) {
this._prevCondition = false;
set ngIf(condition: any) {
if (condition && !this._hasView) {
this._hasView = true;
this._viewContainer.createEmbeddedView(this._template);
} else if (!condition && this._hasView) {
this._hasView = false;
this._viewContainer.clear();
}
}

12
modules/@angular/common/src/directives/ng_plural.ts
View File

@ -6,9 +6,8 @@
* found in the LICENSE file at https://angular.io/license
*/
import {Attribute, Directive, Host, Input, OnInit, TemplateRef, ViewContainerRef} from '@angular/core';
import {Attribute, Directive, Host, Input, TemplateRef, ViewContainerRef} from '@angular/core';
import {isPresent} from '../facade/lang';
import {NgLocalization, getPluralCategory} from '../localization';
import {SwitchView} from './ng_switch';
@ -79,23 +78,24 @@ export class NgPlural {
_updateView(): void {
this._clearViews();
var key =
getPluralCategory(this._switchValue, Object.keys(this._caseViews), this._localization);
const cases = Object.keys(this._caseViews);
const key = getPluralCategory(this._switchValue, cases, this._localization);
this._activateView(this._caseViews[key]);
}
/** @internal */
_clearViews() {
if (isPresent(this._activeView)) this._activeView.destroy();
if (this._activeView) this._activeView.destroy();
}
/** @internal */
_activateView(view: SwitchView) {
if (!isPresent(view)) return;
if (view) {
this._activeView = view;
this._activeView.create();
}
}
}
/**
* @experimental

32
modules/@angular/common/src/directives/ng_style.ts
View File

@ -8,10 +8,6 @@
import {Directive, DoCheck, ElementRef, Input, KeyValueChangeRecord, KeyValueDiffer, KeyValueDiffers, Renderer} from '@angular/core';
import {isBlank, isPresent} from '../facade/lang';
/**
* The `NgStyle` directive changes styles based on a result of expression evaluation.
*
@ -79,34 +75,34 @@ export class NgStyle implements DoCheck {
@Input()
set ngStyle(v: {[key: string]: string}) {
this._ngStyle = v;
if (isBlank(this._differ) && isPresent(v)) {
this._differ = this._differs.find(this._ngStyle).create(null);
if (!this._differ && v) {
this._differ = this._differs.find(v).create(null);
}
}
ngDoCheck() {
if (isPresent(this._differ)) {
var changes = this._differ.diff(this._ngStyle);
if (isPresent(changes)) {
if (this._differ) {
const changes = this._differ.diff(this._ngStyle);
if (changes) {
this._applyChanges(changes);
}
}
}
private _applyChanges(changes: any): void {
changes.forEachRemovedItem(
(record: KeyValueChangeRecord) => { this._setStyle(record.key, null); });
changes.forEachRemovedItem((record: KeyValueChangeRecord) => this._setStyle(record.key, null));
changes.forEachAddedItem(
(record: KeyValueChangeRecord) => { this._setStyle(record.key, record.currentValue); });
(record: KeyValueChangeRecord) => this._setStyle(record.key, record.currentValue));
changes.forEachChangedItem(
(record: KeyValueChangeRecord) => { this._setStyle(record.key, record.currentValue); });
(record: KeyValueChangeRecord) => this._setStyle(record.key, record.currentValue));
}
private _setStyle(name: string, val: string): void {
const nameParts = name.split('.');
const nameToSet = nameParts[0];
const valToSet = isPresent(val) && nameParts.length === 2 ? `${val}${nameParts[1]}` : val;
private _setStyle(nameAndUnit: string, value: string): void {
const [name, unit] = nameAndUnit.split('.');
value = value !== null && value !== void(0) && unit ? `${value}${unit}` : value;
this._renderer.setElementStyle(this._ngEl.nativeElement, nameToSet, valToSet);
this._renderer.setElementStyle(this._ngEl.nativeElement, name, value);
}
}

17
modules/@angular/common/src/directives/ng_switch.ts
View File

@ -9,7 +9,6 @@
import {Directive, Host, Input, TemplateRef, ViewContainerRef} from '@angular/core';
import {ListWrapper} from '../facade/collection';
import {isBlank, isPresent, normalizeBlank} from '../facade/lang';
const _CASE_DEFAULT = new Object();
@ -92,10 +91,10 @@ export class NgSwitch {
// Add the ViewContainers matching the value (with a fallback to default)
this._useDefault = false;
var views = this._valueViews.get(value);
if (isBlank(views)) {
let views = this._valueViews.get(value);
if (!views) {
this._useDefault = true;
views = normalizeBlank(this._valueViews.get(_CASE_DEFAULT));
views = this._valueViews.get(_CASE_DEFAULT) || null;
}
this._activateViews(views);
@ -128,7 +127,7 @@ export class NgSwitch {
/** @internal */
_emptyAllActiveViews(): void {
var activeContainers = this._activeViews;
const activeContainers = this._activeViews;
for (var i = 0; i < activeContainers.length; i++) {
activeContainers[i].destroy();
}
@ -138,7 +137,7 @@ export class NgSwitch {
/** @internal */
_activateViews(views: SwitchView[]): void {
// TODO(vicb): assert(this._activeViews.length === 0);
if (isPresent(views)) {
if (views) {
for (var i = 0; i < views.length; i++) {
views[i].create();
}
@ -148,8 +147,8 @@ export class NgSwitch {
/** @internal */
_registerView(value: any, view: SwitchView): void {
var views = this._valueViews.get(value);
if (isBlank(views)) {
let views = this._valueViews.get(value);
if (!views) {
views = [];
this._valueViews.set(value, views);
}
@ -160,7 +159,7 @@ export class NgSwitch {
_deregisterView(value: any, view: SwitchView): void {
// `_CASE_DEFAULT` is used a marker for non-registered cases
if (value === _CASE_DEFAULT) return;
var views = this._valueViews.get(value);
const views = this._valueViews.get(value);
if (views.length == 1) {
this._valueViews.delete(value);
} else {

4
tools/public_api_guard/common/index.d.ts vendored
View File

@ -122,7 +122,7 @@ export declare class NgFor implements DoCheck, OnChanges {
ngForOf: any;
ngForTemplate: TemplateRef<NgForRow>;
ngForTrackBy: TrackByFn;
constructor(_viewContainer: ViewContainerRef, _templateRef: TemplateRef<NgForRow>, _iterableDiffers: IterableDiffers, _cdr: ChangeDetectorRef);
constructor(_viewContainer: ViewContainerRef, _template: TemplateRef<NgForRow>, _differs: IterableDiffers, _cdr: ChangeDetectorRef);
ngDoCheck(): void;
ngOnChanges(changes: SimpleChanges): void;
}
@ -130,7 +130,7 @@ export declare class NgFor implements DoCheck, OnChanges {
/** @stable */
export declare class NgIf {
ngIf: any;
constructor(_viewContainer: ViewContainerRef, _templateRef: TemplateRef<Object>);
constructor(_viewContainer: ViewContainerRef, _template: TemplateRef<Object>);
}
/** @experimental */