/*
* Copyright 2000-2014 Vaadin Ltd.
*
* 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.vaadin.client.ui;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.IFrameElement;
import com.google.gwt.user.client.ui.Widget;
import com.vaadin.client.BrowserInfo;
public class VBrowserFrame extends Widget {
protected IFrameElement iframe;
protected Element altElement;
protected String altText;
public static final String CLASSNAME = "v-browserframe";
public VBrowserFrame() {
Element root = Document.get().createDivElement();
setElement(root);
setStyleName(CLASSNAME);
createAltTextElement();
}
/**
* Always creates new iframe inside widget. Will replace previous iframe.
*
* @return
*/
protected IFrameElement createIFrameElement(String src) {
String name = null;
// Remove alt text
if (altElement != null) {
getElement().removeChild(altElement);
altElement = null;
}
// Remove old iframe
if (iframe != null) {
name = iframe.getAttribute("name");
getElement().removeChild(iframe);
iframe = null;
}
iframe = Document.get().createIFrameElement();
iframe.setSrc(src);
iframe.setFrameBorder(0);
iframe.setAttribute("width", "100%");
iframe.setAttribute("height", "100%");
iframe.setAttribute("allowTransparency", "true");
getElement().appendChild(iframe);
// Reset old attributes (except src)
if (name != null) {
iframe.setName(name);
}
return iframe;
}
protected void createAltTextElement() {
if (iframe != null) {
return;
}
if (altElement == null) {
altElement = Document.get().createSpanElement();
getElement().appendChild(altElement);
}
if (altText != null) {
altElement.setInnerText(altText);
} else {
altElement.setInnerText("");
}
}
public void setAlternateText(String altText) {
if (this.altText != altText) {
this.altText = altText;
if (altElement != null) {
if (altText != null) {
altElement.setInnerText(altText);
} else {
altElement.setInnerText("");
}
}
}
}
/**
* Set the source (the "src" attribute) of iframe. Will replace old iframe
* with new.
*
* @param source
* Source of iframe.
*/
public void setSource(String source) {
if (source == null) {
if (iframe != null) {
getElement().removeChild(iframe);
iframe = null;
}
createAltTextElement();
setAlternateText(altText);
return;
}
if (iframe == null || iframe.getSrc() != source) {
createIFrameElement(source);
}
}
public void setName(String name) {
if (iframe != null) {
iframe.setName(name);
}
}
@Override
protected void onDetach() {
if (BrowserInfo.get().isIE()) {
// Force browser to fire unload event when component is detached
// from the view (IE doesn't do this automatically)
if (iframe != null) {
/*
* src was previously set to javascript:false, but this was not
* enough to overcome a bug when detaching an iframe with a pdf
* loaded in IE9. about:blank seems to cause the adobe reader
* plugin to unload properly before the iframe is removed. See
* #7855
*/
iframe.setSrc("about:blank");
}
}
super.onDetach();
}
}