blois@google.com
de9fbf0e90
This should be invisible to end users, but basically brings dart:html in-line with the core libraries. BUG= Review URL: https://codereview.chromium.org//12061008 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@17929 260f80e4-7a28-3924-810f-c04153c831b5
105 lines
3.1 KiB
Plaintext
105 lines
3.1 KiB
Plaintext
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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part of $LIBRARYNAME;
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$(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
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$!MEMBERS
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/**
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* Checks to see if the mutation observer API is supported on the current
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* platform.
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*/
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static bool get supported {
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$if DARTIUM
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return true;
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$else
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return JS('bool',
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'!!(window.MutationObserver || window.WebKitMutationObserver)');
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$endif
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}
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void observe(Node target,
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{Map options,
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bool childList,
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bool attributes,
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bool characterData,
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bool subtree,
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bool attributeOldValue,
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bool characterDataOldValue,
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List<String> attributeFilter}) {
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// Parse options into map of known type.
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var parsedOptions = _createDict();
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if (options != null) {
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options.forEach((k, v) {
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if (_boolKeys.containsKey(k)) {
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_add(parsedOptions, k, true == v);
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} else if (k == 'attributeFilter') {
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_add(parsedOptions, k, _fixupList(v));
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} else {
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throw new ArgumentError(
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"Illegal MutationObserver.observe option '$k'");
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}
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});
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}
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// Override options passed in the map with named optional arguments.
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override(key, value) {
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if (value != null) _add(parsedOptions, key, value);
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}
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override('childList', childList);
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override('attributes', attributes);
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override('characterData', characterData);
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override('subtree', subtree);
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override('attributeOldValue', attributeOldValue);
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override('characterDataOldValue', characterDataOldValue);
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if (attributeFilter != null) {
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override('attributeFilter', _fixupList(attributeFilter));
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}
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_call(target, parsedOptions);
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}
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// TODO: Change to a set when const Sets are available.
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static final _boolKeys =
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const {'childList': true,
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'attributes': true,
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'characterData': true,
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'subtree': true,
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'attributeOldValue': true,
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'characterDataOldValue': true };
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$if DARTIUM
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static _createDict() => {};
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static _add(m, String key, value) { m[key] = value; }
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static _fixupList(list) => list;
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void _call(Node target, options) {
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_observe(target, options);
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}
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$endif
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$if DART2JS
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static _createDict() => JS('var', '{}');
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static _add(m, String key, value) { JS('void', '#[#] = #', m, key, value); }
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static _fixupList(list) => list; // TODO: Ensure is a JavaScript Array.
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// Call native function with no conversions.
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@JSName('observe')
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void _call(target, options) native;
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factory MutationObserver(MutationCallback callback) {
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// Dummy statement to mark types as instantiated.
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JS('MutationObserver|MutationRecord', '0');
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return JS('MutationObserver',
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'new(window.MutationObserver||window.WebKitMutationObserver||'
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'window.MozMutationObserver)(#)',
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convertDartClosureToJS(callback, 2));
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}
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$endif
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}
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