angular2/src/render/dom/shadow_dom/light_dom.map

Angular 2 - a web framework for modern web apps

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{DOM} from 'angular2/src/dom/dom_adapter';\nimport {List, ListWrapper} from 'angular2/src/facade/collection';\nimport {isBlank, isPresent} from 'angular2/src/facade/lang';\n\nimport * as viewModule from '../view/view';\nimport {Content} from './content_tag';\n\nexport class DestinationLightDom {}\n\nclass _Root {\n  node;\n  boundElementIndex:number;\n\n  constructor(node, boundElementIndex) {\n    this.node = node;\n    this.boundElementIndex = boundElementIndex;\n  }\n}\n\n// TODO: LightDom should implement DestinationLightDom\n// once interfaces are supported\nexport class LightDom {\n  // The light DOM of the element is enclosed inside the lightDomView\n  lightDomView:viewModule.RenderView;\n  // The shadow DOM\n  shadowDomView:viewModule.RenderView;\n  // The nodes of the light DOM\n  nodes:List;\n  roots:List<_Root>;\n\n  constructor(lightDomView:viewModule.RenderView, shadowDomView:viewModule.RenderView, element) {\n    this.lightDomView = lightDomView;\n    this.shadowDomView = shadowDomView;\n    this.nodes = DOM.childNodesAsList(element);\n\n    this.roots = null;\n  }\n\n  redistribute() {\n    redistributeNodes(this.contentTags(), this.expandedDomNodes());\n  }\n\n  contentTags(): List<Content> {\n    return this._collectAllContentTags(this.shadowDomView, []);\n  }\n\n  // Collects the Content directives from the view and all its child views\n  _collectAllContentTags(view: viewModule.RenderView, acc:List<Content>):List<Content> {\n    var contentTags = view.contentTags;\n    var vcs = view.viewContainers;\n    for (var i=0; i<vcs.length; i++) {\n      var vc = vcs[i];\n      var contentTag = contentTags[i];\n      if (isPresent(contentTag)) {\n        ListWrapper.push(acc, contentTag);\n      }\n      if (isPresent(vc)) {\n        ListWrapper.forEach(vc.contentTagContainers(), (view) => {\n          this._collectAllContentTags(view, acc);\n        });\n      }\n    }\n    return acc;\n  }\n\n  // Collects the nodes of the light DOM by merging:\n  // - nodes from enclosed ViewContainers,\n  // - nodes from enclosed content tags,\n  // - plain DOM nodes\n  expandedDomNodes():List {\n    var res = [];\n\n    var roots = this._roots();\n    for (var i = 0; i < roots.length; ++i) {\n\n      var root = roots[i];\n      if (isPresent(root.boundElementIndex)) {\n        var vc = this.lightDomView.viewContainers[root.boundElementIndex];\n        var content = this.lightDomView.contentTags[root.boundElementIndex];\n        if (isPresent(vc)) {\n          res = ListWrapper.concat(res, vc.nodes());\n        } else if (isPresent(content)) {\n          res = ListWrapper.concat(res, content.nodes());\n        } else {\n          ListWrapper.push(res, root.node);\n        }\n      } else {\n        ListWrapper.push(res, root.node);\n      }\n    }\n    return res;\n  }\n\n  // Returns a list of Roots for all the nodes of the light DOM.\n  // The Root object contains the DOM node and its corresponding boundElementIndex\n  _roots() {\n    if (isPresent(this.roots)) return this.roots;\n\n    var boundElements = this.lightDomView.boundElements;\n\n    this.roots = ListWrapper.map(this.nodes, (n) => {\n      var boundElementIndex = null;\n      for (var i=0; i<boundElements.length; i++) {\n        var boundEl = boundElements[i];\n        if (isPresent(boundEl) && boundEl === n) {\n          boundElementIndex = i;\n          break;\n        }\n      }\n      return new _Root(n, boundElementIndex);\n    });\n\n    return this.roots;\n  }\n}\n\n// Projects the light DOM into the shadow DOM\nfunction redistributeNodes(contents:List<Content>, nodes:List) {\n  for (var i = 0; i < contents.length; ++i) {\n    var content = contents[i];\n    var select = content.select;\n\n    // Empty selector is identical to <content/>\n    if (select.length === 0) {\n      content.insert(ListWrapper.clone(nodes));\n      ListWrapper.clear(nodes);\n    } else {\n      var matchSelector = (n) => DOM.elementMatches(n, select);\n      var matchingNodes = ListWrapper.filter(nodes, matchSelector);\n      content.insert(matchingNodes);\n      ListWrapper.removeAll(nodes, matchingNodes);\n    }\n  }\n  for (var i = 0; i < nodes.length; i++) {\n    var node = nodes[i];\n    if (isPresent(node.parentNode)) {\n      DOM.remove(nodes[i]);\n    }\n  }\n}\n"]}