com.google.gwt.user.client.impl.HistoryImplTimer Maven / Gradle / Ivy
/*
* Copyright 2008 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.user.client.impl;
/**
* Base class for history implementations that use a timer rather than the
* onhashchange event.
*/
class HistoryImplTimer extends HistoryImpl {
@Override
public native boolean init() /*-{
var token = '';
// Get the initial token from the url's hash component.
var hash = $wnd.location.hash;
if (hash.length > 0) {
token = [email protected]::decodeFragment(Ljava/lang/String;)(hash.substring(1));
}
@com.google.gwt.user.client.impl.HistoryImpl::setToken(Ljava/lang/String;)(token);
// Create the timer that checks the browser's url hash every 1/4 s.
var historyImpl = this;
var checkHistory = $entry(function() {
var token = '', hash = $wnd.location.hash;
if (hash.length > 0) {
token = [email protected]::decodeFragment(Ljava/lang/String;)(hash.substring(1));
}
[email protected]::newItemOnEvent(Ljava/lang/String;)(token);
});
var checkHistoryCycle = function() {
@com.google.gwt.core.client.impl.Impl::setTimeout(Lcom/google/gwt/core/client/JavaScriptObject;I)(checkHistoryCycle, 250);
checkHistory();
}
// Kick off the timer.
checkHistoryCycle();
return true;
}-*/;
}