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

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