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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Custom binding for the declarativeContent API.
var binding = require('binding').Binding.create('declarativeContent');
var utils = require('utils');
var validate = require('schemaUtils').validate;
var canonicalizeCompoundSelector =
requireNative('css_natives').CanonicalizeCompoundSelector;
binding.registerCustomHook( function(api) {
var declarativeContent = api.compiledApi;
// Returns the schema definition of type |typeId| defined in |namespace|.
function getSchema(typeId) {
return utils.lookup(api.schema.types,
'id',
'declarativeContent.' + typeId);
}
// Helper function for the constructor of concrete datatypes of the
// declarative content API.
// Makes sure that |this| contains the union of parameters and
// {'instanceType': 'declarativeContent.' + typeId} and validates the
// generated union dictionary against the schema for |typeId|.
function setupInstance(instance, parameters, typeId) {
for (var key in parameters) {
if ($Object.hasOwnProperty(parameters, key)) {
instance[key] = parameters[key];
}
}
instance.instanceType = 'declarativeContent.' + typeId;
var schema = getSchema(typeId);
validate([instance], [schema]);
}
function canonicalizeCssSelectors(selectors) {
for (var i = 0; i < selectors.length; i++) {
var canonicalizedSelector = canonicalizeCompoundSelector(selectors[i]);
if (canonicalizedSelector == '') {
throw new Error(
'Element of \'css\' array must be a ' +
'list of valid compound selectors: ' +
selectors[i]);
}
selectors[i] = canonicalizedSelector;
}
}
// Setup all data types for the declarative content API.
declarativeContent.PageStateMatcher = function(parameters) {
setupInstance(this, parameters, 'PageStateMatcher');
if ($Object.hasOwnProperty(this, 'css')) {
canonicalizeCssSelectors(this.css);
}
};
declarativeContent.ShowPageAction = function(parameters) {
setupInstance(this, parameters, 'ShowPageAction');
};
});
exports.binding = binding.generate();
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