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 /**
  21  * Text actions (cut, copy, paste) for the Web browser.
  22  */
  23 public class TextAction extends Action {
  24         protected WebBrowser browser;
  25
  26         protected byte type;
  27
  28         public static final byte CUT = 0;
  29
  30         public static final byte COPY = 1;
  31
  32         public static final byte PASTE = 2;
  33
  34         /**
  35          * TextAction constructor comment.
  36          */
  37         protected TextAction(WebBrowser browser, byte type) {
  38                 super(type + "!");
  39                 this.browser = browser;
  40                 this.type = type;
  41         }
  42
  43         /**
  44          * Copies the selected text to the clipboard. The text will be put in the
  45          * clipboard in plain text format.
  46          * <p>
  47          *
  48          * @exception SWTException
  49          *                <ul>
  50          *                <li>ERROR_WIDGET_DISPOSED - if the receiver has been
  51          *                disposed</li>
  52          *                <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
  53          *                thread that created the receiver</li>
  54          *                </ul>
  55          */
  56         public void copy() {
  57                 Point selection = browser.combo.getSelection();
  58
  59                 int length = selection.y - selection.x;
  60                 if (length > 0) {
  61                         TextTransfer plainTextTransfer = TextTransfer.getInstance();
  62                         try {
  63                                 browser.clipboard.setContents(new String[] { browser.combo
  64                                                 .getText().substring(selection.x, selection.y) },
  65                                                 new Transfer[] { plainTextTransfer });
  66                         } catch (SWTError error) {
  67                                 // Copy to clipboard failed. This happens when another
  68                                 // application
  69                                 // is accessing the clipboard while we copy. Ignore the error.
  70                                 // Fixes 1GDQAVN
  71                         }
  72                 }
  73         }
  74
  75         /**
  76          * Moves the selected text to the clipboard. The text will be put in the
  77          * clipboard in plain text format and RTF format.
  78          * <p>
  79          *
  80          * @exception SWTException
  81          *                <ul>
  82          *                <li>ERROR_WIDGET_DISPOSED - if the receiver has been
  83          *                disposed</li>
  84          *                <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
  85          *                thread that created the receiver</li>
  86          *                </ul>
  87          */
  88         public void cut() {
  89                 Point selection = browser.combo.getSelection();
  90
  91                 if (selection.y > selection.x) {
  92                         copy();
  93                         delete();
  94                 }
  95         }
  96
  97         /**
  98          * Deletes the character to the right of the caret. Delete the selected text
  99          * if any.
 100          */
 101         public void delete() {
 102                 Point selection = browser.combo.getSelection();
 103                 String text = browser.combo.getText();
 104
 105                 if (selection.x != selection.y) {
 106                         text = text.substring(0, selection.x) + text.substring(selection.y);
 107                         browser.combo.setText(text);
 108                         browser.combo.setSelection(new Point(selection.x, selection.x));
 109                 }
 110         }
 111
 112         /**
 113          * Replaces the selection with the clipboard text or insert the text at the
 114          * current caret offset if there is no selection. If the widget has the
 115          * SWT.SINGLE style and the clipboard text contains more than one line, only
 116          * the first line without line delimiters is inserted in the widget.
 117          * <p>
 118          *
 119          * @exception SWTException
 120          *                <ul>
 121          *                <li>ERROR_WIDGET_DISPOSED - if the receiver has been
 122          *                disposed</li>
 123          *                <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
 124          *                thread that created the receiver</li>
 125          *                </ul>
 126          */
 127         public void paste() {
 128                 TextTransfer transfer = TextTransfer.getInstance();
 129                 Point selection = browser.combo.getSelection();
 130                 String text = browser.combo.getText();
 131
 132                 String newText = (String) browser.clipboard.getContents(transfer);
 133                 if (newText != null && newText.length() > 0) {
 134                         text = text.substring(0, selection.x) + newText
 135                                         + text.substring(selection.y);
 136                         browser.combo.setText(text);
 137
 138                         // set the selection to the end of the paste
 139                         int x = selection.x + newText.length();
 140                         browser.combo.setSelection(new Point(x, x));
 141                 }
 142         }
 143
 144         /**
 145          * Implementation of method defined on <code>IAction</code>.
 146          */
 147         public void run() {
 148                 if (browser == null || browser.combo == null)
 149                         return;
 150                 if (type == CUT)
 151                         cut();
 152                 else if (type == COPY)
 153                         copy();
 154                 else if (type == PASTE)
 155                         paste();
 156         }
 157
 158         /**
 159          *
 160          */
 161         protected void update() {
 162         }
 163 }