angular2
Version:
Angular 2 - a web framework for modern web apps
157 lines • 23.9 kB
JavaScript
import { provide, ReflectiveInjector } from 'angular2/core';
import { NG1_SCOPE } from './constants';
const INITIAL_VALUE = {
__UNINITIALIZED__: true
};
export class DowngradeNg2ComponentAdapter {
constructor(id, info, element, attrs, scope, parentInjector, parse, componentFactory) {
this.id = id;
this.info = info;
this.element = element;
this.attrs = attrs;
this.scope = scope;
this.parentInjector = parentInjector;
this.parse = parse;
this.componentFactory = componentFactory;
this.component = null;
this.inputChangeCount = 0;
this.inputChanges = null;
this.componentRef = null;
this.changeDetector = null;
this.contentInsertionPoint = null;
this.element[0].id = id;
this.componentScope = scope.$new();
this.childNodes = element.contents();
}
bootstrapNg2() {
var childInjector = ReflectiveInjector.resolveAndCreate([provide(NG1_SCOPE, { useValue: this.componentScope })], this.parentInjector);
this.contentInsertionPoint = document.createComment('ng1 insertion point');
this.componentRef =
this.componentFactory.create(childInjector, [[this.contentInsertionPoint]], '#' + this.id);
this.changeDetector = this.componentRef.changeDetectorRef;
this.component = this.componentRef.instance;
}
setupInputs() {
var attrs = this.attrs;
var inputs = this.info.inputs;
for (var i = 0; i < inputs.length; i++) {
var input = inputs[i];
var expr = null;
if (attrs.hasOwnProperty(input.attr)) {
var observeFn = ((prop) => {
var prevValue = INITIAL_VALUE;
return (value) => {
if (this.inputChanges !== null) {
this.inputChangeCount++;
this.inputChanges[prop] =
new Ng1Change(value, prevValue === INITIAL_VALUE ? value : prevValue);
prevValue = value;
}
this.component[prop] = value;
};
})(input.prop);
attrs.$observe(input.attr, observeFn);
}
else if (attrs.hasOwnProperty(input.bindAttr)) {
expr = attrs[input.bindAttr];
}
else if (attrs.hasOwnProperty(input.bracketAttr)) {
expr = attrs[input.bracketAttr];
}
else if (attrs.hasOwnProperty(input.bindonAttr)) {
expr = attrs[input.bindonAttr];
}
else if (attrs.hasOwnProperty(input.bracketParenAttr)) {
expr = attrs[input.bracketParenAttr];
}
if (expr != null) {
var watchFn = ((prop) => (value, prevValue) => {
if (this.inputChanges != null) {
this.inputChangeCount++;
this.inputChanges[prop] = new Ng1Change(prevValue, value);
}
this.component[prop] = value;
})(input.prop);
this.componentScope.$watch(expr, watchFn);
}
}
var prototype = this.info.type.prototype;
if (prototype && prototype.ngOnChanges) {
// Detect: OnChanges interface
this.inputChanges = {};
this.componentScope.$watch(() => this.inputChangeCount, () => {
var inputChanges = this.inputChanges;
this.inputChanges = {};
this.component.ngOnChanges(inputChanges);
});
}
this.componentScope.$watch(() => this.changeDetector && this.changeDetector.detectChanges());
}
projectContent() {
var childNodes = this.childNodes;
var parent = this.contentInsertionPoint.parentNode;
if (parent) {
for (var i = 0, ii = childNodes.length; i < ii; i++) {
parent.insertBefore(childNodes[i], this.contentInsertionPoint);
}
}
}
setupOutputs() {
var attrs = this.attrs;
var outputs = this.info.outputs;
for (var j = 0; j < outputs.length; j++) {
var output = outputs[j];
var expr = null;
var assignExpr = false;
var bindonAttr = output.bindonAttr ? output.bindonAttr.substring(0, output.bindonAttr.length - 6) : null;
var bracketParenAttr = output.bracketParenAttr ?
`[(${output.bracketParenAttr.substring(2, output.bracketParenAttr.length - 8)})]` :
null;
if (attrs.hasOwnProperty(output.onAttr)) {
expr = attrs[output.onAttr];
}
else if (attrs.hasOwnProperty(output.parenAttr)) {
expr = attrs[output.parenAttr];
}
else if (attrs.hasOwnProperty(bindonAttr)) {
expr = attrs[bindonAttr];
assignExpr = true;
}
else if (attrs.hasOwnProperty(bracketParenAttr)) {
expr = attrs[bracketParenAttr];
assignExpr = true;
}
if (expr != null && assignExpr != null) {
var getter = this.parse(expr);
var setter = getter.assign;
if (assignExpr && !setter) {
throw new Error(`Expression '${expr}' is not assignable!`);
}
var emitter = this.component[output.prop];
if (emitter) {
emitter.subscribe({
next: assignExpr ? ((setter) => (value) => setter(this.scope, value))(setter) :
((getter) => (value) => getter(this.scope, { $event: value }))(getter)
});
}
else {
throw new Error(`Missing emitter '${output.prop}' on component '${this.info.selector}'!`);
}
}
}
}
registerCleanup() {
this.element.bind('$destroy', () => {
this.componentScope.$destroy();
this.componentRef.destroy();
});
}
}
class Ng1Change {
constructor(previousValue, currentValue) {
this.previousValue = previousValue;
this.currentValue = currentValue;
}
isFirstChange() { return this.previousValue === this.currentValue; }
}
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{\n  provide,\n  ChangeDetectorRef,\n  Injector,\n  OnChanges,\n  ComponentFactory,\n  ComponentRef,\n  SimpleChange,\n  ReflectiveInjector\n} from 'angular2/core';\nimport {NG1_SCOPE} from './constants';\nimport {ComponentInfo} from './metadata';\nimport Element = protractor.Element;\nimport * as angular from './angular_js';\n\nconst INITIAL_VALUE = {\n  __UNINITIALIZED__: true\n};\n\nexport class DowngradeNg2ComponentAdapter {\n  component: any = null;\n  inputChangeCount: number = 0;\n  inputChanges: {[key: string]: SimpleChange} = null;\n  componentRef: ComponentRef = null;\n  changeDetector: ChangeDetectorRef = null;\n  componentScope: angular.IScope;\n  childNodes: Node[];\n  contentInsertionPoint: Node = null;\n\n  constructor(private id: string, private info: ComponentInfo,\n              private element: angular.IAugmentedJQuery, private attrs: angular.IAttributes,\n              private scope: angular.IScope, private parentInjector: Injector,\n              private parse: angular.IParseService, private componentFactory: ComponentFactory) {\n    (<any>this.element[0]).id = id;\n    this.componentScope = scope.$new();\n    this.childNodes = <Node[]><any>element.contents();\n  }\n\n  bootstrapNg2() {\n    var childInjector = ReflectiveInjector.resolveAndCreate(\n        [provide(NG1_SCOPE, {useValue: this.componentScope})], this.parentInjector);\n    this.contentInsertionPoint = document.createComment('ng1 insertion point');\n\n    this.componentRef =\n        this.componentFactory.create(childInjector, [[this.contentInsertionPoint]], '#' + this.id);\n    this.changeDetector = this.componentRef.changeDetectorRef;\n    this.component = this.componentRef.instance;\n  }\n\n  setupInputs(): void {\n    var attrs = this.attrs;\n    var inputs = this.info.inputs;\n    for (var i = 0; i < inputs.length; i++) {\n      var input = inputs[i];\n      var expr = null;\n      if (attrs.hasOwnProperty(input.attr)) {\n        var observeFn = ((prop) => {\n          var prevValue = INITIAL_VALUE;\n          return (value) => {\n            if (this.inputChanges !== null) {\n              this.inputChangeCount++;\n              this.inputChanges[prop] =\n                  new Ng1Change(value, prevValue === INITIAL_VALUE ? value : prevValue);\n              prevValue = value;\n            }\n            this.component[prop] = value;\n          };\n        })(input.prop);\n        attrs.$observe(input.attr, observeFn);\n      } else if (attrs.hasOwnProperty(input.bindAttr)) {\n        expr = attrs[input.bindAttr];\n      } else if (attrs.hasOwnProperty(input.bracketAttr)) {\n        expr = attrs[input.bracketAttr];\n      } else if (attrs.hasOwnProperty(input.bindonAttr)) {\n        expr = attrs[input.bindonAttr];\n      } else if (attrs.hasOwnProperty(input.bracketParenAttr)) {\n        expr = attrs[input.bracketParenAttr];\n      }\n      if (expr != null) {\n        var watchFn = ((prop) => (value, prevValue) => {\n          if (this.inputChanges != null) {\n            this.inputChangeCount++;\n            this.inputChanges[prop] = new Ng1Change(prevValue, value);\n          }\n          this.component[prop] = value;\n        })(input.prop);\n        this.componentScope.$watch(expr, watchFn);\n      }\n    }\n\n    var prototype = this.info.type.prototype;\n    if (prototype && (<OnChanges>prototype).ngOnChanges) {\n      // Detect: OnChanges interface\n      this.inputChanges = {};\n      this.componentScope.$watch(() => this.inputChangeCount, () => {\n        var inputChanges = this.inputChanges;\n        this.inputChanges = {};\n        (<OnChanges>this.component).ngOnChanges(inputChanges);\n      });\n    }\n    this.componentScope.$watch(() => this.changeDetector && this.changeDetector.detectChanges());\n  }\n\n  projectContent() {\n    var childNodes = this.childNodes;\n    var parent = this.contentInsertionPoint.parentNode;\n    if (parent) {\n      for (var i = 0, ii = childNodes.length; i < ii; i++) {\n        parent.insertBefore(childNodes[i], this.contentInsertionPoint);\n      }\n    }\n  }\n\n  setupOutputs() {\n    var attrs = this.attrs;\n    var outputs = this.info.outputs;\n    for (var j = 0; j < outputs.length; j++) {\n      var output = outputs[j];\n      var expr = null;\n      var assignExpr = false;\n\n      var bindonAttr =\n          output.bindonAttr ? output.bindonAttr.substring(0, output.bindonAttr.length - 6) : null;\n      var bracketParenAttr =\n          output.bracketParenAttr ?\n              `[(${output.bracketParenAttr.substring(2, output.bracketParenAttr.length - 8)})]` :\n              null;\n\n      if (attrs.hasOwnProperty(output.onAttr)) {\n        expr = attrs[output.onAttr];\n      } else if (attrs.hasOwnProperty(output.parenAttr)) {\n        expr = attrs[output.parenAttr];\n      } else if (attrs.hasOwnProperty(bindonAttr)) {\n        expr = attrs[bindonAttr];\n        assignExpr = true;\n      } else if (attrs.hasOwnProperty(bracketParenAttr)) {\n        expr = attrs[bracketParenAttr];\n        assignExpr = true;\n      }\n\n      if (expr != null && assignExpr != null) {\n        var getter = this.parse(expr);\n        var setter = getter.assign;\n        if (assignExpr && !setter) {\n          throw new Error(`Expression '${expr}' is not assignable!`);\n        }\n        var emitter = this.component[output.prop];\n        if (emitter) {\n          emitter.subscribe({\n            next: assignExpr ? ((setter) => (value) => setter(this.scope, value))(setter) :\n                               ((getter) => (value) => getter(this.scope, {$event: value}))(getter)\n          });\n        } else {\n          throw new Error(`Missing emitter '${output.prop}' on component '${this.info.selector}'!`);\n        }\n      }\n    }\n  }\n\n  registerCleanup() {\n    this.element.bind('$destroy', () => {\n      this.componentScope.$destroy();\n      this.componentRef.destroy();\n    });\n  }\n}\n\nclass Ng1Change implements SimpleChange {\n  constructor(public previousValue: any, public currentValue: any) {}\n\n  isFirstChange(): boolean { return this.previousValue === this.currentValue; }\n}\n"]}