bundles/org.simantics.scl.ui/src/org/simantics/scl/ui/assist/StyledTextContentAdapter.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2008 Mateusz Matela and others.\r
   3  * All rights reserved. This program and the accompanying materials\r
   4  * are made available under the terms of the Eclipse Public License v1.0\r
   5  * which accompanies this distribution, and is available at\r
   6  * http://www.eclipse.org/legal/epl-v10.html\r
   7  *\r
   8  * Contributors:\r
   9  *     Mateusz Matela <mateusz.matela@gmail.com> -  Make StyledText work with ContentAssistCommandAdapter - https://bugs.eclipse.org/bugs/show_bug.cgi?id=246388\r
  10  *******************************************************************************/\r
  11 package org.simantics.scl.ui.assist;\r
  12 \r
  13 import org.eclipse.jface.fieldassist.IControlContentAdapter;\r
  14 import org.eclipse.jface.fieldassist.IControlContentAdapter2;\r
  15 import org.eclipse.swt.custom.StyledText;\r
  16 import org.eclipse.swt.graphics.Point;\r
  17 import org.eclipse.swt.graphics.Rectangle;\r
  18 import org.eclipse.swt.widgets.Control;\r
  19 \r
  20 /**\r
  21  * An {@link IControlContentAdapter} for {@link org.eclipse.swt.custom.StyledText}. This is\r
  22  * a convenience class for easily creating a {@link ContentProposalAdapter} for text fields.\r
  23  * \r
  24  * @since 3.5\r
  25  */\r
  26 public class StyledTextContentAdapter implements IControlContentAdapter, IControlContentAdapter2 {\r
  27         /*\r
  28          * (non-Javadoc)\r
  29          * \r
  30          * @see\r
  31          * org.eclipse.jface.fieldassist.IControlContentAdapter#getControlContents(org.eclipse\r
  32          * .swt.widgets.Control)\r
  33          */\r
  34         public String getControlContents(Control control) {\r
  35                 return ((StyledText)control).getText();\r
  36         }\r
  37 \r
  38         /*\r
  39          * (non-Javadoc)\r
  40          * \r
  41          * @see\r
  42          * org.eclipse.jface.fieldassist.IControlContentAdapter#getCursorPosition(org.eclipse\r
  43          * .swt.widgets.Control)\r
  44          */\r
  45         public int getCursorPosition(Control control) {\r
  46                 return ((StyledText)control).getCaretOffset();\r
  47         }\r
  48 \r
  49         /*\r
  50          * (non-Javadoc)\r
  51          * \r
  52          * @see\r
  53          * org.eclipse.jface.fieldassist.IControlContentAdapter#getInsertionBounds(org.eclipse\r
  54          * .swt.widgets.Control)\r
  55          */\r
  56         public Rectangle getInsertionBounds(Control control) {\r
  57                 StyledText text= (StyledText)control;\r
  58                 Point caretOrigin= text.getLocationAtOffset(text.getCaretOffset());\r
  59                 return new Rectangle(caretOrigin.x + text.getClientArea().x, caretOrigin.y + text.getClientArea().y + 3, 1, text.getLineHeight());\r
  60         }\r
  61 \r
  62         /*\r
  63          * (non-Javadoc)\r
  64          * \r
  65          * @see\r
  66          * org.eclipse.jface.fieldassist.IControlContentAdapter#insertControlContents(org.eclipse\r
  67          * .swt.widgets.Control, java.lang.String, int)\r
  68          */\r
  69         public void insertControlContents(Control control, String contents, int cursorPosition) {\r
  70                 StyledText text = ((StyledText)control);\r
  71                 cursorPosition = Math.min(cursorPosition, contents.length());\r
  72                 int caretEndRange = text.getCaretOffset();\r
  73                 String currentText = text.getText();\r
  74                 \r
  75                 int offset = caretEndRange;\r
  76         int length = currentText.length();\r
  77         while (--offset >= 0 && (Character.isJavaIdentifierPart(currentText.charAt(offset)) && !Character.isWhitespace(currentText.charAt(offset))))\r
  78             length--;\r
  79                 \r
  80                 int nameSpaceBeginRange = currentText.lastIndexOf(".", caretEndRange - 1);\r
  81                 if (nameSpaceBeginRange > length)\r
  82                     length = nameSpaceBeginRange;\r
  83                 int endRange = currentText.length();\r
  84                 if (caretEndRange < endRange)\r
  85                     endRange = caretEndRange;\r
  86                 text.setSelection(length, endRange);\r
  87                 text.insert(contents);\r
  88                 // calculate the initial count of letters that was typed when the proposal was accepted to insert the caret\r
  89                 // at the right position\r
  90                 int proposalFirstLettersCount = endRange - (length);\r
  91                 text.setCaretOffset(caretEndRange + cursorPosition - proposalFirstLettersCount);\r
  92         }\r
  93 \r
  94         /*\r
  95          * (non-Javadoc)\r
  96          * \r
  97          * @see\r
  98          * org.eclipse.jface.fieldassist.IControlContentAdapter#setControlContents(org.eclipse\r
  99          * .swt.widgets.Control, java.lang.String, int)\r
 100          */\r
 101         public void setControlContents(Control control, String contents, int cursorPosition) {\r
 102                 ((StyledText)control).setText(contents);\r
 103                 ((StyledText)control).setCaretOffset(cursorPosition);\r
 104         }\r
 105 \r
 106         /*\r
 107          * (non-Javadoc)\r
 108          * \r
 109          * @see\r
 110          * org.eclipse.jface.fieldassist.IControlContentAdapter#setCursorPosition(org.eclipse\r
 111          * .swt.widgets.Control, int)\r
 112          */\r
 113         public void setCursorPosition(Control control, int index) {\r
 114                 ((StyledText)control).setCaretOffset(index);\r
 115         }\r
 116 \r
 117         /*\r
 118          * (non-Javadoc)\r
 119          * \r
 120          * @see\r
 121          * org.eclipse.jface.fieldassist.IControlContentAdapter2#getSelection(org.eclipse.swt\r
 122          * .widgets.Control)\r
 123          */\r
 124         public Point getSelection(Control control) {\r
 125                 return ((StyledText)control).getSelection();\r
 126         }\r
 127 \r
 128         /*\r
 129          * (non-Javadoc)\r
 130          * \r
 131          * @see\r
 132          * org.eclipse.jface.fieldassist.IControlContentAdapter2#setSelection(org.eclipse.swt\r
 133          * .widgets.Control, org.eclipse.swt.graphics.Point)\r
 134          */\r
 135         public void setSelection(Control control, Point range) {\r
 136                 ((StyledText)control).setSelection(range);\r
 137         }\r
 138 \r
 139 }\r