/*
* DiffMatchPatch.java
*
* Copyright (C) 2009-12 by RStudio, Inc.
*
* Unless you have received this program directly from RStudio pursuant
* to the terms of a commercial license agreement with RStudio, then
* this program is licensed to you under the terms of version 3 of the
* GNU Affero General Public License. This program is distributed WITHOUT
* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
*
*/
package org.rstudio.core.client.patch;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.HeadElement;
import com.google.gwt.dom.client.ScriptElement;
import com.google.gwt.resources.client.ClientBundle;
import com.google.gwt.resources.client.TextResource;
public class DiffMatchPatch
{
interface Resources extends ClientBundle
{
@Source("diff_match_patch.js")
TextResource diff_match_patch();
}
static
{
injectJavascript(
((Resources) GWT.create(Resources.class)).diff_match_patch().getText());
}
private static void injectJavascript(String source)
{
Document doc = Document.get();
HeadElement head = (HeadElement) doc.getElementsByTagName("head").getItem(0);
if (head == null)
{
head = doc.createHeadElement();
doc.insertBefore(head, doc.getBody());
}
ScriptElement script = doc.createScriptElement(
source);
script.setType("text/javascript");
head.appendChild(script);
}
public static native String diff(String s1, String s2) /*-{
var dmp = new $wnd.diff_match_patch();
var patches = dmp.patch_make(s1, s2);
return dmp.patch_toText(patches);
}-*/;
}