angular2/es6/prod/src/core/compiler/proto_view_factory.map

Angular 2 - a web framework for modern web apps

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{Injectable} from 'angular2/di';\nimport {List, ListWrapper, MapWrapper} from 'angular2/src/facade/collection';\nimport {isPresent, isBlank} from 'angular2/src/facade/lang';\nimport {reflector} from 'angular2/src/reflection/reflection';\n\nimport {ChangeDetection} from 'angular2/change_detection';\nimport {Component, Viewport, DynamicComponent} from '../annotations/annotations';\n\nimport * as renderApi from 'angular2/src/render/api';\nimport {AppProtoView} from './view';\nimport {ProtoElementInjector, DirectiveBinding} from './element_injector';\n\n@Injectable()\nexport class ProtoViewFactory {\n  _changeDetection:ChangeDetection;\n\n  constructor(changeDetection:ChangeDetection) {\n    this._changeDetection = changeDetection;\n  }\n\n  createProtoView(componentBinding:DirectiveBinding, renderProtoView: renderApi.ProtoViewDto, directives:List<DirectiveBinding>):AppProtoView {\n    var protoChangeDetector;\n    if (isBlank(componentBinding)) {\n      protoChangeDetector = this._changeDetection.createProtoChangeDetector('root', null);\n    } else {\n      var componentAnnotation:Component = componentBinding.annotation;\n      protoChangeDetector = this._changeDetection.createProtoChangeDetector(\n        'dummy', componentAnnotation.changeDetection\n      );\n    }\n    var protoView = new AppProtoView(renderProtoView.render, protoChangeDetector);\n\n    for (var i=0; i<renderProtoView.elementBinders.length; i++) {\n      var renderElementBinder = renderProtoView.elementBinders[i];\n      var sortedDirectives = new SortedDirectives(renderElementBinder.directives, directives);\n      var parentPeiWithDistance = this._findParentProtoElementInjectorWithDistance(\n        i, protoView.elementBinders, renderProtoView.elementBinders\n      );\n      var protoElementInjector = this._createProtoElementInjector(\n        i, parentPeiWithDistance,\n        sortedDirectives, renderElementBinder\n      );\n      this._createElementBinder(\n        protoView, renderElementBinder, protoElementInjector, sortedDirectives\n      );\n      this._createDirectiveBinders(protoView, sortedDirectives);\n    }\n    MapWrapper.forEach(renderProtoView.variableBindings, (mappedName, varName) => {\n      protoView.bindVariable(varName, mappedName);\n    });\n    return protoView;\n  }\n\n  _findParentProtoElementInjectorWithDistance(binderIndex, elementBinders, renderElementBinders) {\n    var distance = 0;\n    do {\n      var renderElementBinder = renderElementBinders[binderIndex];\n      binderIndex = renderElementBinder.parentIndex;\n      if (binderIndex !== -1) {\n        distance += renderElementBinder.distanceToParent;\n        var elementBinder = elementBinders[binderIndex];\n        if (isPresent(elementBinder.protoElementInjector)) {\n          return new ParentProtoElementInjectorWithDistance(elementBinder.protoElementInjector, distance);\n        }\n      }\n    } while (binderIndex !== -1);\n    return new ParentProtoElementInjectorWithDistance(null, -1);\n  }\n\n  _createProtoElementInjector(binderIndex, parentPeiWithDistance, sortedDirectives, renderElementBinder) {\n    var protoElementInjector = null;\n    // Create a protoElementInjector for any element that either has bindings *or* has one\n    // or more var- defined. Elements with a var- defined need a their own element injector\n    // so that, when hydrating, $implicit can be set to the element.\n    var hasVariables = MapWrapper.size(renderElementBinder.variableBindings) > 0;\n    if (sortedDirectives.directives.length > 0 || hasVariables) {\n      protoElementInjector = new ProtoElementInjector(\n          parentPeiWithDistance.protoElementInjector, binderIndex,\n          sortedDirectives.directives,\n          isPresent(sortedDirectives.componentDirective), parentPeiWithDistance.distance\n      );\n      protoElementInjector.attributes = renderElementBinder.readAttributes;\n      // Viewport directives are treated differently than other element with var- definitions.\n      if (hasVariables && !isPresent(sortedDirectives.viewportDirective)) {\n        protoElementInjector.exportComponent = isPresent(sortedDirectives.componentDirective);\n        protoElementInjector.exportElement = isBlank(sortedDirectives.componentDirective);\n\n        // experiment\n        var exportImplicitName = MapWrapper.get(renderElementBinder.variableBindings, '\\$implicit');\n        if (isPresent(exportImplicitName)) {\n          protoElementInjector.exportImplicitName = exportImplicitName;\n        }\n      }\n    }\n    return protoElementInjector;\n  }\n\n  _createElementBinder(protoView, renderElementBinder, protoElementInjector, sortedDirectives) {\n    var parent = null;\n    if (renderElementBinder.parentIndex !== -1) {\n      parent = protoView.elementBinders[renderElementBinder.parentIndex];\n    }\n    var elBinder = protoView.bindElement(\n      parent,\n      renderElementBinder.distanceToParent,\n      protoElementInjector,\n      sortedDirectives.componentDirective,\n      sortedDirectives.viewportDirective\n    );\n    // text nodes\n    for (var i=0; i<renderElementBinder.textBindings.length; i++) {\n      protoView.bindTextNode(renderElementBinder.textBindings[i]);\n    }\n    // element properties\n    MapWrapper.forEach(renderElementBinder.propertyBindings, (astWithSource, propertyName) => {\n      protoView.bindElementProperty(astWithSource, propertyName);\n    });\n    // events\n    protoView.bindEvent(renderElementBinder.eventBindings, -1);\n    // variables\n    // The view's locals needs to have a full set of variable names at construction time\n    // in order to prevent new variables from being set later in the lifecycle. Since we don't want\n    // to actually create variable bindings for the $implicit bindings, add to the\n    // protoLocals manually.\n    MapWrapper.forEach(renderElementBinder.variableBindings, (mappedName, varName) => {\n      MapWrapper.set(protoView.protoLocals, mappedName, null);\n    });\n    return elBinder;\n  }\n\n  _createDirectiveBinders(protoView, sortedDirectives) {\n    for (var i=0; i<sortedDirectives.renderDirectives.length; i++) {\n      var renderDirectiveMetadata = sortedDirectives.renderDirectives[i];\n      // directive properties\n      MapWrapper.forEach(renderDirectiveMetadata.propertyBindings, (astWithSource, propertyName) => {\n        // TODO: these setters should eventually be created by change detection, to make\n        // it monomorphic!\n        var setter = reflector.setter(propertyName);\n        protoView.bindDirectiveProperty(i, astWithSource, propertyName, setter);\n      });\n      // directive events\n      protoView.bindEvent(renderDirectiveMetadata.eventBindings, i);\n    }\n  }\n\n}\n\nclass SortedDirectives {\n  componentDirective: DirectiveBinding;\n  viewportDirective: DirectiveBinding;\n  renderDirectives: List<renderApi.DirectiveMetadata>;\n  directives: List<DirectiveBinding>;\n\n  constructor(renderDirectives, allDirectives) {\n    this.renderDirectives = [];\n    this.directives = [];\n    this.viewportDirective = null;\n    this.componentDirective = null;\n    ListWrapper.forEach(renderDirectives, (renderDirectiveMetadata) => {\n      var directiveBinding = allDirectives[renderDirectiveMetadata.directiveIndex];\n      if ((directiveBinding.annotation instanceof Component) || (directiveBinding.annotation instanceof DynamicComponent)) {\n        // component directives need to be the first binding in ElementInjectors!\n        this.componentDirective = directiveBinding;\n        ListWrapper.insert(this.renderDirectives, 0, renderDirectiveMetadata);\n        ListWrapper.insert(this.directives, 0, directiveBinding);\n      } else {\n        if (directiveBinding.annotation instanceof Viewport) {\n          this.viewportDirective = directiveBinding;\n        }\n        ListWrapper.push(this.renderDirectives, renderDirectiveMetadata);\n        ListWrapper.push(this.directives, directiveBinding);\n      }\n    });\n\n  }\n}\n\nclass ParentProtoElementInjectorWithDistance {\n  protoElementInjector:ProtoElementInjector;\n  distance:number;\n  constructor(protoElementInjector:ProtoElementInjector, distance:number) {\n    this.protoElementInjector = protoElementInjector;\n    this.distance = distance;\n  }\n}\n"]}