angular2/es6/dev/src/render/dom/compiler/directive_parser.map

Angular 2 - a web framework for modern web apps

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{isPresent, isBlank, BaseException, assertionsEnabled, RegExpWrapper, StringWrapper} from 'angular2/src/facade/lang';\nimport {List, MapWrapper, ListWrapper} from 'angular2/src/facade/collection';\nimport {DOM} from 'angular2/src/dom/dom_adapter';\nimport {Parser} from 'angular2/change_detection';\n\nimport {SelectorMatcher, CssSelector} from 'angular2/src/render/dom/compiler/selector';\n\nimport {CompileStep} from './compile_step';\nimport {CompileElement} from './compile_element';\nimport {CompileControl} from './compile_control';\n\nimport {DirectiveMetadata} from '../../api';\nimport {dashCaseToCamelCase, camelCaseToDashCase, EVENT_TARGET_SEPARATOR} from '../util';\n\n/**\n * Parses the directives on a single element. Assumes ViewSplitter has already created\n * <template> elements for template directives.\n */\nexport class DirectiveParser extends CompileStep {\n  _selectorMatcher:SelectorMatcher;\n  _directives:List<DirectiveMetadata>;\n  _parser:Parser;\n\n  constructor(parser: Parser, directives:List<DirectiveMetadata>) {\n    super();\n    this._parser = parser;\n    this._selectorMatcher = new SelectorMatcher();\n    this._directives = directives;\n    for (var i=0; i<directives.length; i++) {\n      var selector = CssSelector.parse(directives[i].selector);\n      this._selectorMatcher.addSelectables(selector, i);\n    }\n  }\n\n  process(parent:CompileElement, current:CompileElement, control:CompileControl) {\n    var attrs = current.attrs();\n    var classList = current.classList();\n\n    var cssSelector = new CssSelector();\n    var nodeName = DOM.nodeName(current.element);\n    cssSelector.setElement(nodeName);\n    for (var i=0; i < classList.length; i++) {\n      cssSelector.addClassName(classList[i]);\n    }\n\n    MapWrapper.forEach(attrs, (attrValue, attrName) => {\n      cssSelector.addAttribute(attrName, attrValue);\n    });\n\n    var viewportDirective;\n    var componentDirective;\n    // Note: We assume that the ViewSplitter already did its work, i.e. template directive should\n    // only be present on <template> elements!\n    var isTemplateElement = DOM.isTemplateElement(current.element);\n\n    this._selectorMatcher.match(cssSelector, (selector, directiveIndex) => {\n      var elementBinder = current.bindElement();\n      var directive = this._directives[directiveIndex];\n      var directiveBinder = elementBinder.bindDirective(directiveIndex);\n      current.compileChildren = current.compileChildren && directive.compileChildren;\n      if (isPresent(directive.properties)) {\n        MapWrapper.forEach(directive.properties, (bindConfig, dirProperty) => {\n          this._bindDirectiveProperty(dirProperty, bindConfig, current, directiveBinder);\n        });\n      }\n      if (isPresent(directive.hostListeners)) {\n        MapWrapper.forEach(directive.hostListeners, (action, eventName) => {\n          this._bindDirectiveEvent(eventName, action, current, directiveBinder);\n        });\n      }\n      if (isPresent(directive.setters)) {\n        ListWrapper.forEach(directive.setters, (propertyName) => {\n          elementBinder.bindPropertySetter(propertyName);\n        });\n      }\n      if (isPresent(directive.readAttributes)) {\n        ListWrapper.forEach(directive.readAttributes, (attrName) => {\n          elementBinder.readAttribute(attrName);\n        });\n      }\n      if (directive.type === DirectiveMetadata.VIEWPORT_TYPE) {\n        if (!isTemplateElement) {\n          throw new BaseException(`Viewport directives need to be placed on <template> elements or elements ` +\n            `with template attribute - check ${current.elementDescription}`);\n        }\n        if (isPresent(viewportDirective)) {\n          throw new BaseException(`Only one viewport directive is allowed per element - check ${current.elementDescription}`);\n        }\n        viewportDirective = directive;\n      } else {\n        if (isTemplateElement) {\n          throw new BaseException(`Only template directives are allowed on template elements - check ${current.elementDescription}`);\n        }\n        if (directive.type === DirectiveMetadata.COMPONENT_TYPE) {\n          if (isPresent(componentDirective)) {\n            throw new BaseException(`Only one component directive is allowed per element - check ${current.elementDescription}`);\n          }\n          componentDirective = directive;\n          elementBinder.setComponentId(directive.id);\n        }\n      }\n    });\n  }\n\n  _bindDirectiveProperty(dirProperty, bindConfig, compileElement, directiveBinder) {\n    var pipes = this._splitBindConfig(bindConfig);\n    var elProp = ListWrapper.removeAt(pipes, 0);\n\n    var bindingAst = MapWrapper.get(\n      compileElement.bindElement().propertyBindings,\n      dashCaseToCamelCase(elProp)\n    );\n\n    if (isBlank(bindingAst)) {\n      var attributeValue = MapWrapper.get(compileElement.attrs(), camelCaseToDashCase(elProp));\n      if (isPresent(attributeValue)) {\n        bindingAst = this._parser.wrapLiteralPrimitive(\n          attributeValue,\n          compileElement.elementDescription\n        );\n      }\n    }\n\n    // Bindings are optional, so this binding only needs to be set up if an expression is given.\n    if (isPresent(bindingAst)) {\n      var fullExpAstWithBindPipes = this._parser.addPipes(bindingAst, pipes);\n      directiveBinder.bindProperty(\n        dirProperty, fullExpAstWithBindPipes\n      );\n    }\n  }\n\n  _bindDirectiveEvent(eventName, action, compileElement, directiveBinder) {\n    var ast = this._parser.parseAction(action, compileElement.elementDescription);\n    if (StringWrapper.contains(eventName, EVENT_TARGET_SEPARATOR)) {\n      var parts = eventName.split(EVENT_TARGET_SEPARATOR);\n      directiveBinder.bindEvent(parts[1], ast, parts[0]);\n    } else {\n      directiveBinder.bindEvent(eventName, ast);\n    }\n    \n  }\n\n  _splitBindConfig(bindConfig:string) {\n    return ListWrapper.map(bindConfig.split('|'), (s) => s.trim());\n  }\n}\n\n"]}