1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Custom binding for the declarativeContent API. 6 7 var binding = require('binding').Binding.create('declarativeContent'); 8 9 var utils = require('utils'); 10 var validate = require('schemaUtils').validate; 11 var canonicalizeCompoundSelector = 12 requireNative('css_natives').CanonicalizeCompoundSelector; 13 var setIcon = require('setIcon').setIcon; 14 15 binding.registerCustomHook( function(api) { 16 var declarativeContent = api.compiledApi; 17 18 // Returns the schema definition of type |typeId| defined in |namespace|. 19 function getSchema(typeId) { 20 return utils.lookup(api.schema.types, 21 'id', 22 'declarativeContent.' + typeId); 23 } 24 25 // Helper function for the constructor of concrete datatypes of the 26 // declarative content API. 27 // Makes sure that |this| contains the union of parameters and 28 // {'instanceType': 'declarativeContent.' + typeId} and validates the 29 // generated union dictionary against the schema for |typeId|. 30 function setupInstance(instance, parameters, typeId) { 31 for (var key in parameters) { 32 if ($Object.hasOwnProperty(parameters, key)) { 33 instance[key] = parameters[key]; 34 } 35 } 36 instance.instanceType = 'declarativeContent.' + typeId; 37 var schema = getSchema(typeId); 38 validate([instance], [schema]); 39 } 40 41 function canonicalizeCssSelectors(selectors) { 42 for (var i = 0; i < selectors.length; i++) { 43 var canonicalizedSelector = canonicalizeCompoundSelector(selectors[i]); 44 if (canonicalizedSelector == '') { 45 throw new Error( 46 'Element of \'css\' array must be a ' + 47 'list of valid compound selectors: ' + 48 selectors[i]); 49 } 50 selectors[i] = canonicalizedSelector; 51 } 52 } 53 54 // Setup all data types for the declarative content API. 55 declarativeContent.PageStateMatcher = function(parameters) { 56 setupInstance(this, parameters, 'PageStateMatcher'); 57 if ($Object.hasOwnProperty(this, 'css')) { 58 canonicalizeCssSelectors(this.css); 59 } 60 }; 61 declarativeContent.ShowPageAction = function(parameters) { 62 setupInstance(this, parameters, 'ShowPageAction'); 63 }; 64 declarativeContent.RequestContentScript = function(parameters) { 65 setupInstance(this, parameters, 'RequestContentScript'); 66 }; 67 // TODO(rockot): Do not expose this in M39 stable. Making this restriction 68 // possible will take some extra work. See http://crbug.com/415315 69 declarativeContent.SetIcon = function(parameters) { 70 setIcon(parameters, function (data) { 71 setupInstance(this, data, 'SetIcon'); 72 }.bind(this)); 73 }; 74 }); 75 76 exports.binding = binding.generate(); 77
