/*

  * Copyright (c) 2008-2010, Matthias Mann

  *

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions are met:

  *

  *     * Redistributions of source code must retain the above copyright notice,

  *       this list of conditions and the following disclaimer.

  *     * Redistributions in binary form must reproduce the above copyright

  *       notice, this list of conditions and the following disclaimer in the

  *       documentation and/or other materials provided with the distribution.

  *     * Neither the name of Matthias Mann nor the names of its contributors may

  *       be used to endorse or promote products derived from this software

  *       without specific prior written permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR

  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  */

 package chat;

 import de.matthiasmann.twl.DesktopArea;

 import de.matthiasmann.twl.DialogLayout;

 import de.matthiasmann.twl.EditField;

 import de.matthiasmann.twl.Event;

 import de.matthiasmann.twl.FPSCounter;

 import de.matthiasmann.twl.GUI;

 import de.matthiasmann.twl.ResizableFrame;

 import de.matthiasmann.twl.ScrollPane;

 import de.matthiasmann.twl.TextArea;

 import de.matthiasmann.twl.textarea.HTMLTextAreaModel;

 import de.matthiasmann.twl.renderer.lwjgl.LWJGLRenderer;

 import de.matthiasmann.twl.theme.ThemeManager;

 import org.lwjgl.Sys;

 import org.lwjgl.opengl.Display;

 import org.lwjgl.opengl.DisplayMode;

 import org.lwjgl.opengl.GL11;

 import test.TestUtils;

 /**

  * A chat demo

  *

  * This class also acts as root pane

  *

  * @author Matthias Mann

  */

 public class ChatDemo extends DesktopArea {

     public static void main(String[] args) {

         try {

             Display.setDisplayMode(new DisplayMode(800, 600));

             Display.create();

             Display.setTitle("TWL Chat Demo");

             Display.setVSyncEnabled(true);

             LWJGLRenderer renderer = new LWJGLRenderer();

             ChatDemo chat = new ChatDemo();

             GUI gui = new GUI(chat, renderer);

             ThemeManager theme = ThemeManager.createThemeManager(

                     ChatDemo.class.getResource("chat.xml"), renderer);

             gui.applyTheme(theme);

             while(!Display.isCloseRequested() && !chat.quit) {

                 GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);

                 gui.update();

                 Display.update();

                 TestUtils.reduceInputLag();

             }

             gui.destroy();

             theme.destroy();

         } catch (Exception ex) {

             TestUtils.showErrMsg(ex);

         }

         Display.destroy();

     }

     private final FPSCounter fpsCounter;

     private final ChatFrame chatFrame;

     public boolean quit;

     public ChatDemo() {

         fpsCounter = new FPSCounter();

         add(fpsCounter);

         chatFrame = new ChatFrame();

         add(chatFrame);

         chatFrame.setSize(400, 200);

         chatFrame.setPosition(10, 350);

     }

     @Override

     protected void layout() {

         super.layout();

         // fpsCounter is bottom right

         fpsCounter.adjustSize();

         fpsCounter.setPosition(

                 getInnerWidth() - fpsCounter.getWidth(),

                 getInnerHeight() - fpsCounter.getHeight());

     }

     @Override

     protected boolean handleEvent(Event evt) {

         if(super.handleEvent(evt)) {

             return true;

         }

         switch (evt.getType()) {

             case KEY_PRESSED:

                 switch (evt.getKeyCode()) {

                     case Event.KEY_ESCAPE:

                         quit = true;

                         return true;

                 }

         }

         return false;

     }

     static class ChatFrame extends ResizableFrame {

         private final StringBuilder sb;

         private final HTMLTextAreaModel textAreaModel;

         private final TextArea textArea;

         private final EditField editField;

         private final ScrollPane scrollPane;

         private int curColor;

         public ChatFrame() {

             setTitle("Chat");

             this.sb = new StringBuilder();

             this.textAreaModel = new HTMLTextAreaModel();

             this.textArea = new TextArea(textAreaModel);

             this.editField = new EditField();

             editField.addCallback(new EditField.Callback() {

                 public void callback(int key) {

                     if(key == Event.KEY_RETURN) {

                         // cycle through 3 different colors/font styles

                         appendRow("color"+curColor, editField.getText());

                         editField.setText("");

                         curColor = (curColor + 1) % 3;

                     }

                 }

             });

             textArea.addCallback(new TextArea.Callback() {

                 public void handleLinkClicked(String href) {

                     Sys.openURL(href);

                 }

             });

             scrollPane = new ScrollPane(textArea);

             scrollPane.setFixed(ScrollPane.Fixed.HORIZONTAL);

             DialogLayout l = new DialogLayout();

             l.setTheme("content");

             l.setHorizontalGroup(l.createParallelGroup(scrollPane, editField));

             l.setVerticalGroup(l.createSequentialGroup(scrollPane, editField));

             add(l);

             appendRow("default", "Welcome to the chat demo. Type your messages below :)");

         }

         private void appendRow(String font, String text) {

             sb.append("<div style=\"word-wrap: break-word; font-family: ").append(font).append("; \">");

             // not efficient but simple

             for(int i=0,l=text.length() ; i<l ; i++) {

                 char ch = text.charAt(i);

                 switch(ch) {

                     case '<': sb.append("&lt;"); break;

                     case '>': sb.append(">"); break;

                     case '&': sb.append("&"); break;

                     case '"': sb.append("""); break;

                     case ':':

                         if(text.startsWith(":)", i)) {

                             sb.append("<img src=\"smiley\" alt=\":)\"/>");

                             i += 1; // skip one less because of i++ in the for loop

                             break;

                         }

                         sb.append(ch);

                         break;

                     case 'h':

                         if(text.startsWith("http://", i)) {

                             int end = i + 7;

                             while(end < l && isURLChar(text.charAt(end))) {

                                 end++;

                             }

                             String href = text.substring(i, end);

                             sb.append("<a style=\"font: link\" href=\"").append(href)

                                     .append("\" >").append(href)

                                     .append("</a>");

                             i = end - 1; // skip one less because of i++ in the for loop

                             break;

                         }

                         // fall through:

                     default:

                         sb.append(ch);

                 }

             }

             sb.append("</div>");

             boolean isAtEnd = scrollPane.getMaxScrollPosY() == scrollPane.getScrollPositionY();

             textAreaModel.setHtml(sb.toString());

             if(isAtEnd) {

                 scrollPane.validateLayout();

                 scrollPane.setScrollPositionY(scrollPane.getMaxScrollPosY());

             }

         }

         private boolean isURLChar(char ch) {

             return (ch == '.') || (ch == '/') || (ch == '%') ||

                     (ch >= '0' && ch <= '9') ||

                     (ch >= 'a' && ch <= 'z') ||

                     (ch >= 'A' && ch <= 'Z');

         }

     }

 }