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renderer.ts
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import {
Inject, Injectable, Optional, NgZone,
Renderer2, RendererFactory2, RendererType2,
RendererStyleFlags2, ViewEncapsulation,
} from "@angular/core";
import { Device } from "tns-core-modules/platform";
import { View } from "tns-core-modules/ui/core/view";
import { addCss } from "tns-core-modules/application";
import { topmost } from "tns-core-modules/ui/frame";
import { profile } from "tns-core-modules/profiling";
import { APP_ROOT_VIEW, DEVICE, getRootPage } from "./platform-providers";
import { isBlank } from "./lang-facade";
import { ViewUtil } from "./view-util";
import { NgView, InvisibleNode } from "./element-registry";
import { rendererLog as traceLog } from "./trace";
// CONTENT_ATTR not exported from NativeScript_renderer - we need it for styles application.
const COMPONENT_REGEX = /%COMP%/g;
export const COMPONENT_VARIABLE = "%COMP%";
export const HOST_ATTR = `_nghost-${COMPONENT_VARIABLE}`;
export const CONTENT_ATTR = `_ngcontent-${COMPONENT_VARIABLE}`;
const ATTR_SANITIZER = /-/g;
@Injectable()
export class NativeScriptRendererFactory implements RendererFactory2 {
private componentRenderers = new Map<string, NativeScriptRenderer>();
private viewUtil: ViewUtil;
private defaultRenderer: NativeScriptRenderer;
private rootNgView: NgView;
constructor(
@Optional() @Inject(APP_ROOT_VIEW) rootView: View,
@Inject(DEVICE) device: Device,
private zone: NgZone
) {
this.viewUtil = new ViewUtil(device);
this.setRootNgView(rootView);
this.defaultRenderer = new NativeScriptRenderer(this.rootNgView, zone, this.viewUtil);
}
private setRootNgView(rootView: any) {
if (!rootView) {
rootView = getRootPage() || topmost().currentPage;
}
rootView.nodeName = "NONE";
this.rootNgView = rootView;
}
createRenderer(element: any, type: RendererType2): NativeScriptRenderer {
if (!element || !type) {
return this.defaultRenderer;
}
let renderer: NativeScriptRenderer = this.componentRenderers.get(type.id);
if (!isBlank(renderer)) {
return renderer;
}
if (type.encapsulation === ViewEncapsulation.None) {
type.styles.map(s => s.toString()).forEach(addStyleToCss);
renderer = this.defaultRenderer;
} else {
renderer = new EmulatedRenderer(type, this.rootNgView, this.zone, this.viewUtil);
(<EmulatedRenderer>renderer).applyToHost(element);
}
this.componentRenderers.set(type.id, renderer);
return renderer;
}
}
export class NativeScriptRenderer extends Renderer2 {
data: { [key: string]: any } = Object.create(null);
constructor(
private rootView: NgView,
private zone: NgZone,
private viewUtil: ViewUtil
) {
super();
traceLog("NativeScriptRenderer created");
}
@profile
appendChild(parent: any, newChild: NgView): void {
traceLog(`NativeScriptRenderer.appendChild child: ${newChild} parent: ${parent}`);
this.viewUtil.insertChild(parent, newChild);
}
@profile
insertBefore(parent: NgView, newChild: NgView, refChildIndex: number): void {
traceLog(`NativeScriptRenderer.insertBefore child: ${newChild} parent: ${parent}`);
this.viewUtil.insertChild(parent, newChild, refChildIndex);
}
@profile
removeChild(parent: any, oldChild: NgView): void {
traceLog(`NativeScriptRenderer.removeChild child: ${oldChild} parent: ${parent}`);
this.viewUtil.removeChild(parent, oldChild);
}
@profile
selectRootElement(selector: string): NgView {
traceLog("selectRootElement: " + selector);
return this.rootView;
}
@profile
parentNode(node: NgView): any {
return node.parent || node.templateParent;
}
@profile
nextSibling(node: NgView): number {
traceLog(`NativeScriptRenderer.nextSibling ${node}`);
return this.viewUtil.nextSiblingIndex(node);
}
@profile
createComment(_value: any): InvisibleNode {
traceLog(`NativeScriptRenderer.createComment ${_value}`);
return this.viewUtil.createComment();
@profile
createElement(name: any, _namespace: string): NgView {
traceLog(`NativeScriptRenderer.createElement: ${name}`);
return this.viewUtil.createView(name);
}
@profile
createText(_value: string): InvisibleNode {
traceLog(`NativeScriptRenderer.createText ${_value}`);
return this.viewUtil.createText();
}
@profile
createViewRoot(hostElement: NgView): NgView {
traceLog(`NativeScriptRenderer.createViewRoot ${hostElement.nodeName}`);
return hostElement;
}
@profile
projectNodes(parentElement: NgView, nodes: NgView[]): void {
traceLog("NativeScriptRenderer.projectNodes");
nodes.forEach((node) => this.viewUtil.insertChild(parentElement, node));
}
@profile
destroy() {
traceLog("NativeScriptRenderer.destroy");
// Seems to be called on component dispose only (router outlet)
// TODO: handle this when we resolve routing and navigation.
}
@profile
setAttribute(view: NgView, name: string, value: string, namespace?: string) {
traceLog(`NativeScriptRenderer.setAttribute ${view} : ${name} = ${value}, namespace: ${namespace}`);
return this.viewUtil.setProperty(view, name, value, namespace);
}
@profile
removeAttribute(_el: NgView, _name: string): void {
traceLog(`NativeScriptRenderer.removeAttribute ${_el}: ${_name}`);
}
@profile
setProperty(view: any, name: string, value: any) {
traceLog(`NativeScriptRenderer.setProperty ${view} : ${name} = ${value}`);
return this.viewUtil.setProperty(view, name, value);
}
@profile
addClass(view: NgView, name: string): void {
traceLog(`NativeScriptRenderer.addClass ${name}`);
this.viewUtil.addClass(view, name);
}
@profile
removeClass(view: NgView, name: string): void {
traceLog(`NativeScriptRenderer.removeClass ${name}`);
this.viewUtil.removeClass(view, name);
}
@profile
setStyle(view: NgView, styleName: string, value: any, _flags?: RendererStyleFlags2): void {
traceLog(`NativeScriptRenderer.setStyle: ${styleName} = ${value}`);
this.viewUtil.setStyle(view, styleName, value);
}
@profile
removeStyle(view: NgView, styleName: string, _flags?: RendererStyleFlags2): void {
traceLog("NativeScriptRenderer.removeStyle: ${styleName}");
this.viewUtil.removeStyle(view, styleName);
}
// Used only in debug mode to serialize property changes to comment nodes,
// such as <template> placeholders.
@profile
setBindingDebugInfo(renderElement: NgView, propertyName: string, propertyValue: string): void {
traceLog("NativeScriptRenderer.setBindingDebugInfo: " + renderElement + ", " +
propertyName + " = " + propertyValue);
}
@profile
setElementDebugInfo(renderElement: any, _info: any /*RenderDebugInfo*/): void {
traceLog("NativeScriptRenderer.setElementDebugInfo: " + renderElement);
}
@profile
invokeElementMethod(_renderElement: NgView, methodName: string, args: Array<any>) {
traceLog("NativeScriptRenderer.invokeElementMethod " + methodName + " " + args);
}
@profile
setValue(_renderNode: any, _value: string) {
traceLog("NativeScriptRenderer.setValue");
}
@profile
listen(renderElement: any, eventName: string, callback: (event: any) => boolean):
() => void {
traceLog("NativeScriptRenderer.listen: " + eventName);
// Explicitly wrap in zone
let zonedCallback = (...args) => {
this.zone.run(() => {
callback.apply(undefined, args);
});
};
renderElement.on(eventName, zonedCallback);
if (eventName === View.loadedEvent && renderElement.isLoaded) {
const notifyData = { eventName: View.loadedEvent, object: renderElement };
zonedCallback(notifyData);
}
return () => renderElement.off(eventName, zonedCallback);
}
}
class EmulatedRenderer extends NativeScriptRenderer {
private contentAttr: string;
private hostAttr: string;
constructor(
component: RendererType2,
rootView: NgView,
zone: NgZone,
viewUtil: ViewUtil,
) {
super(rootView, zone, viewUtil);
const componentId = component.id.replace(ATTR_SANITIZER, "_");
this.contentAttr = replaceNgAttribute(CONTENT_ATTR, componentId);
this.hostAttr = replaceNgAttribute(HOST_ATTR, componentId);
this.addStyles(component.styles, componentId);
}
applyToHost(view: NgView) {
super.setAttribute(view, this.hostAttr, "");
}
appendChild(parent: any, newChild: NgView): void {
super.appendChild(parent, newChild);
}
createElement(parent: any, name: string): NgView {
const view = super.createElement(parent, name);
// Set an attribute to the view to scope component-specific css.
// The property name is pre-generated by Angular.
super.setAttribute(view, this.contentAttr, "");
return view;
}
@profile
private addStyles(styles: (string | any[])[], componentId: string) {
styles.map(s => s.toString())
.map(s => replaceNgAttribute(s, componentId))
.forEach(addStyleToCss);
}
}
// tslint:disable-next-line
const addStyleToCss = profile('"renderer".addStyleToCss', function addStyleToCss(style: string): void {
addCss(style);
});
function replaceNgAttribute(input: string, componentId: string): string {
return input.replace(COMPONENT_REGEX, componentId);
}