| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| part of $LIBRARYNAME; |
| |
| $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS { |
| $!MEMBERS |
| /** |
| * Checks to see if the mutation observer API is supported on the current |
| * platform. |
| */ |
| static bool get supported { |
| return JS('bool', |
| '!!(window.MutationObserver || window.WebKitMutationObserver)'); |
| } |
| |
| /** |
| * Observes the target for the specified changes. |
| * |
| * Some requirements for the optional parameters: |
| * |
| * * Either childList, attributes or characterData must be true. |
| * * If attributeOldValue is true then attributes must also be true. |
| * * If attributeFilter is specified then attributes must be true. |
| * * If characterDataOldValue is true then characterData must be true. |
| */ |
| void observe(Node target, |
| {bool childList, |
| bool attributes, |
| bool characterData, |
| bool subtree, |
| bool attributeOldValue, |
| bool characterDataOldValue, |
| List<String> attributeFilter}) { |
| |
| // Parse options into map of known type. |
| var parsedOptions = _createDict(); |
| |
| // Override options passed in the map with named optional arguments. |
| override(key, value) { |
| if (value != null) _add(parsedOptions, key, value); |
| } |
| |
| override('childList', childList); |
| override('attributes', attributes); |
| override('characterData', characterData); |
| override('subtree', subtree); |
| override('attributeOldValue', attributeOldValue); |
| override('characterDataOldValue', characterDataOldValue); |
| if (attributeFilter != null) { |
| override('attributeFilter', _fixupList(attributeFilter)); |
| } |
| |
| _call(target, parsedOptions); |
| } |
| |
| // TODO: Change to a set when const Sets are available. |
| static final _boolKeys = |
| const {'childList': true, |
| 'attributes': true, |
| 'characterData': true, |
| 'subtree': true, |
| 'attributeOldValue': true, |
| 'characterDataOldValue': true }; |
| |
| |
| static _createDict() => JS('var', '{}'); |
| static _add(m, String key, value) { JS('void', '#[#] = #', m, key, value); } |
| static _fixupList(list) => list; // TODO: Ensure is a JavaScript Array. |
| |
| // Call native function with no conversions. |
| @JSName('observe') |
| void _call(target, options) native; |
| |
| factory MutationObserver(MutationCallback callback) { |
| // Dummy statement to mark types as instantiated. |
| JS('MutationObserver|MutationRecord', '0'); |
| |
| return JS('MutationObserver', |
| 'new(window.MutationObserver||window.WebKitMutationObserver||' |
| 'window.MozMutationObserver)(#)', |
| convertDartClosureToJS(_wrapBinaryZone(callback), 2)); |
| } |
| } |