angular2/src/render/dom/compiler/property_binding_parser.map

Angular 2 - a web framework for modern web apps

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{isPresent, RegExpWrapper} from 'angular2/src/facade/lang';\nimport {MapWrapper} from 'angular2/src/facade/collection';\n\nimport {Parser} from 'angular2/change_detection';\n\nimport {CompileStep} from './compile_step';\nimport {CompileElement} from './compile_element';\nimport {CompileControl} from './compile_control';\n\nimport {dashCaseToCamelCase} from '../util';\n\n// Group 1 = \"bind-\"\n// Group 2 = \"var-\" or \"#\"\n// Group 3 = \"on-\"\n// Group 4 = the identifier after \"bind-\", \"var-/#\", or \"on-\"\n// Group 5 = idenitifer inside square braces\n// Group 6 = identifier inside parenthesis\nvar BIND_NAME_REGEXP = RegExpWrapper.create(\n    '^(?:(?:(?:(bind-)|(var-|#)|(on-))(.+))|\\\\[([^\\\\]]+)\\\\]|\\\\(([^\\\\)]+)\\\\))$');\n\n/**\n * Parses the property bindings on a single element.\n */\nexport class PropertyBindingParser extends CompileStep {\n  _parser:Parser;\n\n  constructor(parser:Parser) {\n    super();\n    this._parser = parser;\n  }\n\n  process(parent:CompileElement, current:CompileElement, control:CompileControl) {\n    var attrs = current.attrs();\n    var newAttrs = MapWrapper.create();\n\n    MapWrapper.forEach(attrs, (attrValue, attrName) => {\n      var bindParts = RegExpWrapper.firstMatch(BIND_NAME_REGEXP, attrName);\n      if (isPresent(bindParts)) {\n        if (isPresent(bindParts[1])) {\n          // match: bind-prop\n          this._bindProperty(bindParts[4], attrValue, current, newAttrs);\n        } else if (isPresent(bindParts[2])) {\n          // match: var-name / var-name=\"iden\" / #name / #name=\"iden\"\n          var identifier = bindParts[4];\n          var value = attrValue == '' ? '\\$implicit' : attrValue;\n          this._bindVariable(identifier, value, current, newAttrs);\n        } else if (isPresent(bindParts[3])) {\n          // match: on-event\n          this._bindEvent(bindParts[4], attrValue, current, newAttrs);\n        } else if (isPresent(bindParts[5])) {\n          // match: [prop]\n          this._bindProperty(bindParts[5], attrValue, current, newAttrs);\n        } else if (isPresent(bindParts[6])) {\n          // match: (event)\n          this._bindEvent(bindParts[6], attrValue, current, newAttrs);\n        }\n      } else {\n        var expr = this._parser.parseInterpolation(\n          attrValue, current.elementDescription\n        );\n        if (isPresent(expr)) {\n          this._bindPropertyAst(attrName, expr, current, newAttrs);\n        }\n      }\n    });\n\n    MapWrapper.forEach(newAttrs, (attrValue, attrName) => {\n      MapWrapper.set(attrs, attrName, attrValue);\n    });\n  }\n\n  _bindVariable(identifier, value, current:CompileElement, newAttrs) {\n    current.bindElement().bindVariable(dashCaseToCamelCase(identifier), value);\n    MapWrapper.set(newAttrs, identifier, value);\n  }\n\n  _bindProperty(name, expression, current:CompileElement, newAttrs) {\n    this._bindPropertyAst(\n      name,\n      this._parser.parseBinding(expression, current.elementDescription),\n      current,\n      newAttrs\n    );\n  }\n\n  _bindPropertyAst(name, ast, current:CompileElement, newAttrs) {\n    var binder = current.bindElement();\n    var camelCaseName = dashCaseToCamelCase(name);\n    binder.bindProperty(camelCaseName, ast);\n    MapWrapper.set(newAttrs, name, ast.source);\n  }\n\n  _bindEvent(name, expression, current:CompileElement, newAttrs) {\n    current.bindElement().bindEvent(\n      dashCaseToCamelCase(name), this._parser.parseAction(expression, current.elementDescription)\n    );\n    // Don't detect directives for event names for now,\n    // so don't add the event name to the CompileElement.attrs\n  }\n\n}\n"]}