net.sourceforge.phpeclipse.webbrowser/src/net/sourceforge/phpeclipse/webbrowser/internal/TextAction.java

   1 /**
   2  * Copyright (c) 2003 IBM Corporation and others.
   3  * All rights reserved.   This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *    IBM - Initial API and implementation
  10  */
  11 package net.sourceforge.phpeclipse.webbrowser.internal;
  12
  13 import org.eclipse.jface.action.Action;
  14 import org.eclipse.swt.SWTError;
  15 import org.eclipse.swt.SWTException;
  16 import org.eclipse.swt.dnd.TextTransfer;
  17 import org.eclipse.swt.dnd.Transfer;
  18 import org.eclipse.swt.graphics.Point;
  19 /**
  20  * Text actions (cut, copy, paste) for the Web browser.
  21  */
  22 public class TextAction extends Action {
  23         protected WebBrowser browser;
  24         protected byte type;
  25
  26         public static final byte CUT = 0;
  27         public static final byte COPY = 1;
  28         public static final byte PASTE = 2;
  29
  30         /**
  31          * TextAction constructor comment.
  32          */
  33         protected TextAction(WebBrowser browser, byte type) {
  34                 super(type + "!");
  35                 this.browser = browser;
  36                 this.type = type;
  37         }
  38
  39         /**
  40          * Copies the selected text to the clipboard.  The text will be put in the
  41          * clipboard in plain text format.
  42          * <p>
  43          *
  44          * @exception SWTException <ul>
  45          *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  46          *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  47          * </ul>
  48          */
  49         public void copy() {
  50                 Point selection = browser.combo.getSelection();
  51
  52                 int length = selection.y - selection.x;
  53                 if (length > 0) {
  54                         TextTransfer plainTextTransfer = TextTransfer.getInstance();
  55                         try {
  56                                 browser.clipboard.setContents(
  57                                         new String[] { browser.combo.getText().substring(selection.x, selection.y) },
  58                                         new Transfer[] { plainTextTransfer });
  59                         } catch (SWTError error) {
  60                                 // Copy to clipboard failed. This happens when another application
  61                                 // is accessing the clipboard while we copy. Ignore the error.
  62                                 // Fixes 1GDQAVN
  63                         }
  64                 }
  65         }
  66
  67         /**
  68          * Moves the selected text to the clipboard.  The text will be put in the
  69          * clipboard in plain text format and RTF format.
  70          * <p>
  71          *
  72          * @exception SWTException <ul>
  73          *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
  74          *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
  75          * </ul>
  76          */
  77         public void cut(){
  78                 Point selection = browser.combo.getSelection();
  79
  80                 if (selection.y > selection.x) {
  81                         copy();
  82                         delete();
  83                 }
  84         }
  85
  86         /**
  87          * Deletes the character to the right of the caret. Delete the selected text if any.
  88          */
  89         public void delete() {
  90                 Point selection = browser.combo.getSelection();
  91                 String text = browser.combo.getText();
  92
  93                 if (selection.x != selection.y) {
  94                         text = text.substring(0, selection.x) + text.substring(selection.y);
  95                         browser.combo.setText(text);
  96                         browser.combo.setSelection(new Point(selection.x, selection.x));
  97                 }
  98         }
  99
 100         /**
 101          * Replaces the selection with the clipboard text or insert the text at
 102          * the current caret offset if there is no selection.
 103          * If the widget has the SWT.SINGLE style and the clipboard text contains
 104          * more than one line, only the first line without line delimiters is
 105          * inserted in the widget.
 106          * <p>
 107          *
 108          * @exception SWTException <ul>
 109          *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
 110          *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
 111          * </ul>
 112          */
 113         public void paste() {
 114                 TextTransfer transfer = TextTransfer.getInstance();
 115                 Point selection = browser.combo.getSelection();
 116                 String text = browser.combo.getText();
 117
 118                 String newText = (String) browser.clipboard.getContents(transfer);
 119                 if (newText != null && newText.length() > 0) {
 120                         text = text.substring(0, selection.x) + newText + text.substring(selection.y);
 121                         browser.combo.setText(text);
 122
 123                         // set the selection to the end of the paste
 124                         int x = selection.x + newText.length();
 125                         browser.combo.setSelection(new Point(x, x));
 126                 }
 127         }
 128
 129         /**
 130          * Implementation of method defined on <code>IAction</code>.
 131          */
 132         public void run() {
 133                 if (browser == null || browser.combo == null)
 134                         return;
 135                 if (type == CUT)
 136                         cut();
 137                 else if (type == COPY)
 138                         copy();
 139                 else if (type == PASTE)
 140                         paste();
 141         }
 142
 143         /**
 144          *
 145          */
 146         protected void update() {       }
 147 }