/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- * * ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (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.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ package netscape.test.plugin.composer; import java.io.*; import java.net.*; import netscape.plugin.composer.*; import netscape.plugin.composer.io.*; /** Sample Plugin that adds a "Netscape Now" button to the document. * Shows how to add images to the document. */ public class AddButton extends Plugin { /** Test the plugin. Not required for normal operation of the plugin. * You can use this to run the plugin from the command line: * java -classpath args... * where args... are passed on to the Test class. * You can remove this code before shipping your plugin. */ static public void main(String[] args) { Test.perform(args, new AddButton()); } /** Get the human readable name of the plugin. Defaults to the name of the plugin class. * @return the human readable name of the plugin. */ public String getName() { return "Netscape Button"; } /** Get the human readable category of the plugin. Defaults to the name of the plugin class. * @return the human readable category of the plugin. */ public String getCategory() { return "Insert"; } /** Get the human readable hint for the plugin. This is a one-sentence description of * what the plugin does. Defaults to the name of the plugin class. * @return the human readable hint for the plugin. */ public String getHint() { return "Inserts a 'Netscape Now' image that is linked to the Netscape home page."; } /** Perform the action of the plugin. This plugin adds a "Netscape Now" button * with a link to the Netscape home page. * * @param document the current document. */ public boolean perform(Document document) throws IOException{ // Create a print stream for the new document text. PrintWriter out = new PrintWriter(document.getOutput()); // Create a lexical stream to tokenize the old document text. LexicalStream in = new LexicalStream(new SelectedHTMLReader(document.getInput(), out)); // Keep track of whether or not we are in the selected text. // At the beginning of the document we're outside the selection. // After we encounter the start-selection comment, we're inside // the selection. // After we encounter the end-selection comment, we're outside // the selection again. boolean inSelection = false; Comment selectionStart = null; for(;;){ // Get the next token of the document. Token token = in.next(); if ( token == null ) break; // Null means we've finished the document. else if (token instanceof Comment ) { Comment comment = (Comment) token; if ( comment.isSelectionStart() ){ selectionStart = comment; inSelection = true; continue; // Don't print the selection start yet. } else if (comment.isSelectionEnd() ){ inSelection = false; out.print(selectionStart); insertButton(document, out); } else { // don't output this generic comment. continue; } } out.print(token); } out.close(); return true; } void insertButton(Document document, PrintWriter out){ String fileName = "netnow3.gif"; String imgURLString = "http://home.netscape.com/comprod/products/navigator/version_3.0/images/" + fileName; writeImageToDisk(document, imgURLString, fileName); try { // Write the HTML for the button Tag anchor = new Tag("A"); anchor.addAttribute("HREF", "http://www.netscape.com"); Tag anchorEnd = new Tag("A", false); Tag img = new Tag("IMG"); URL imgURL = new URL(document.getWorkDirectoryURL(), fileName); img.addAttribute("SRC", imgURL.toString()); out.print(anchor); out.print(img); out.print(anchorEnd); } catch (Throwable t){ t.printStackTrace(); } } void writeImageToDisk(Document document, String imgURLString, String fileName){ // We could just reference the image on the netscape site, // but the point of this example is to show how to write // a file to the disk. // In order to do this, we need to have the ability access files. netscape.security.PrivilegeManager.enablePrivilege("UniversalFileAccess"); // And the ability to connect to an arbitrary URL. netscape.security.PrivilegeManager.enablePrivilege("UniversalConnect"); // Copy the image to the work directory. File outFile = new File(document.getWorkDirectory(), fileName); if ( ! outFile.exists() ){ try { InputStream in = new URL(imgURLString).openStream(); FileOutputStream outStream = new FileOutputStream(outFile); int chunkSize = 1024; byte[] bytes = new byte[chunkSize]; int readSize; while ( (readSize = in.read(bytes)) >= 0 ){ outStream.write(bytes, 0, readSize); } outStream.close(); } catch (Exception e) { e.printStackTrace(); } } } }