com.google.gwt.user.client.impl.WindowImplIE 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;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.ScriptElement;
import com.google.gwt.resources.client.ClientBundle;
import com.google.gwt.resources.client.TextResource;
import com.google.gwt.user.client.Command;
/**
* IE implementation of {@link com.google.gwt.user.client.impl.WindowImpl}.
*/
public class WindowImplIE extends WindowImpl {
/**
* The resources for this implementation.
*/
public interface Resources extends ClientBundle {
Resources INSTANCE = GWT.create(Resources.class);
/**
* Contains the function body used to initialize the window close handler.
*/
@Source("initWindowCloseHandler.js")
TextResource initWindowCloseHandler();
/**
* Contains the function body used to initialize the window resize handler.
*/
@Source("initWindowResizeHandler.js")
TextResource initWindowResizeHandler();
/**
* Contains the function body used to initialize the window scroll handler.
*/
@Source("initWindowScrollHandler.js")
TextResource initWindowScrollHandler();
}
/**
* For IE6, reading from $wnd.location.hash drops part of the fragment if the
* fragment contains a '?'. To avoid this bug, we use location.href instead.
*/
@Override
public native String getHash() /*-{
var href = $wnd.location.href;
var hashLoc = href.indexOf("#");
return (hashLoc > 0) ? href.substring(hashLoc) : "";
}-*/;
/**
* For IE6, reading from $wnd.location.search gets confused if hash contains
* a '?'. To avoid this bug, we use location.href instead.
*/
@Override
public native String getQueryString() /*-{
var href = $wnd.location.href;
var hashLoc = href.indexOf("#");
if (hashLoc >= 0) {
// strip off any hash first
href = href.substring(0, hashLoc);
}
var questionLoc = href.indexOf("?");
return (questionLoc > 0) ? href.substring(questionLoc) : "";
}-*/;
@Override
public void initWindowCloseHandler() {
initHandler(Resources.INSTANCE.initWindowCloseHandler().getText(),
new Command() {
public void execute() {
initWindowCloseHandlerImpl();
}
});
}
@Override
public void initWindowResizeHandler() {
initHandler(Resources.INSTANCE.initWindowResizeHandler().getText(),
new Command() {
public void execute() {
initWindowResizeHandlerImpl();
}
});
}
@Override
public void initWindowScrollHandler() {
initHandler(Resources.INSTANCE.initWindowScrollHandler().getText(),
new Command() {
public void execute() {
initWindowScrollHandlerImpl();
}
});
}
/**
* IE6 does not allow direct access to event handlers on the parent window,
* so we must embed a script in the parent window that will set the event
* handlers in the correct context.
*
* @param initFunc the string representation of the init function
* @param cmd the command to execute the init function
*/
private void initHandler(String initFunc, Command cmd) {
if (GWT.isClient()) {
// Embed the init script on the page
ScriptElement scriptElem = Document.get().createScriptElement(initFunc);
Document.get().getBody().appendChild(scriptElem);
// Initialize the handler
cmd.execute();
// Remove the script element
Document.get().getBody().removeChild(scriptElem);
}
}
private native void initWindowCloseHandlerImpl() /*-{
$wnd.__gwt_initWindowCloseHandler(
$entry(@com.google.gwt.user.client.Window::onClosing()),
$entry(@com.google.gwt.user.client.Window::onClosed())
);
}-*/;
private native void initWindowResizeHandlerImpl() /*-{
$wnd.__gwt_initWindowResizeHandler(
$entry(@com.google.gwt.user.client.Window::onResize())
);
}-*/;
private native void initWindowScrollHandlerImpl() /*-{
$wnd.__gwt_initWindowScrollHandler(
$entry(@com.google.gwt.user.client.Window::onScroll())
);
}-*/;
}