com.google.gwt.user.client.impl.WindowImpl 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;
/**
* Native implementation associated with
* {@link com.google.gwt.user.client.Window}.
*/
public class WindowImpl {
public native String getHash() /*-{
return $wnd.location.hash;
}-*/;
public native String getQueryString() /*-{
return $wnd.location.search;
}-*/;
public native void initWindowCloseHandler() /*-{
var oldOnBeforeUnload = $wnd.onbeforeunload;
var oldOnUnload = $wnd.onunload;
// Old mozilla doesn't like $entry's explicit return statement and
// will always pop up a confirmation dialog. This is worked around by
// just wrapping the call to onClosing(), which still has the semantics
// that we want.
$wnd.onbeforeunload = function(evt) {
var ret, oldRet;
try {
ret = $entry(@com.google.gwt.user.client.Window::onClosing())();
} finally {
oldRet = oldOnBeforeUnload && oldOnBeforeUnload(evt);
}
// Avoid returning null as IE6 will coerce it into a string.
// Ensure that "" gets returned properly.
if (ret != null) {
return ret;
}
if (oldRet != null) {
return oldRet;
}
// returns undefined.
};
$wnd.onunload = $entry(function(evt) {
try {
@com.google.gwt.user.client.Window::onClosed()();
} finally {
oldOnUnload && oldOnUnload(evt);
$wnd.onresize = null;
$wnd.onscroll = null;
$wnd.onbeforeunload = null;
$wnd.onunload = null;
}
});
}-*/;
public native void initWindowResizeHandler() /*-{
var oldOnResize = $wnd.onresize;
$wnd.onresize = $entry(function(evt) {
try {
@com.google.gwt.user.client.Window::onResize()();
} finally {
oldOnResize && oldOnResize(evt);
}
});
}-*/;
public native void initWindowScrollHandler() /*-{
var oldOnScroll = $wnd.onscroll;
$wnd.onscroll = $entry(function(evt) {
try {
@com.google.gwt.user.client.Window::onScroll()();
} finally {
oldOnScroll && oldOnScroll(evt);
}
});
}-*/;
}