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- /*
- * Copyright 2000-2018 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();
- }
- }
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