archive/net.sourceforge.phpeclipse.css.ui/src/net/sourceforge/phpeclipse/css/ui/internal/outline/CssOutlineLabelProvider.java

   1 /*
   2  * Copyright (c) 2003-2004 Christopher Lenz 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  *     Christopher Lenz - initial API and implementation
  10  *
  11  * $Id: CssOutlineLabelProvider.java,v 1.1 2004-09-02 18:11:49 jsurfer Exp $
  12  */
  13
  14 package net.sourceforge.phpeclipse.css.ui.internal.outline;
  15
  16 import net.sourceforge.phpeclipse.core.model.ISourceReference;
  17 import net.sourceforge.phpeclipse.css.core.model.IAtRule;
  18 import net.sourceforge.phpeclipse.css.core.model.IStyleRule;
  19 import net.sourceforge.phpeclipse.css.ui.CssUI;
  20
  21 import org.eclipse.jface.viewers.LabelProvider;
  22 import org.eclipse.swt.graphics.Image;
  23
  24 /**
  25  * Label provider for the CSS outline page.
  26  */
  27 public class CssOutlineLabelProvider extends LabelProvider {
  28
  29         // LabelProvider Implementation --------------------------------------------
  30
  31         /**
  32          * @see org.eclipse.jface.viewers.ILabelProvider#getImage(java.lang.Object)
  33          */
  34         public Image getImage(Object element) {
  35                 if (element instanceof IStyleRule) {
  36                         return CssUI.getDefault().getImageRegistry().get(
  37                                 CssUI.ICON_STYLE_RULE);
  38                 } else if (element instanceof IAtRule) {
  39                         return CssUI.getDefault().getImageRegistry().get(
  40                                 CssUI.ICON_AT_RULE);
  41                 }
  42                 return null;
  43         }
  44
  45         /**
  46          * @see org.eclipse.jface.viewers.ILabelProvider#getText(java.lang.Object)
  47          */
  48         public String getText(Object element) {
  49                 StringBuffer text = new StringBuffer();
  50                 if (element instanceof IStyleRule) {
  51                         IStyleRule rule = (IStyleRule) element;
  52                         ISourceReference selector = rule.getSelector();
  53                         if (selector != null) {
  54                                 text.append(selector.getSource());
  55                         }
  56                 } else if (element instanceof IAtRule) {
  57                         IAtRule rule = (IAtRule) element;
  58                         ISourceReference name = rule.getName();
  59                         ISourceReference value = rule.getValue();
  60                         if (name != null) {
  61                                 text.append(name.getSource());
  62                                 if (value != null) {
  63                                         text.append(' ');
  64                                 }
  65                         }
  66                         if (value != null) {
  67                                 text.append(value.getSource());
  68                         }
  69                 }
  70                 return normalizeWhitespace(text.toString());
  71         }
  72
  73         // Private Methods ---------------------------------------------------------
  74
  75         /**
  76          * Replaces all whitespace characters by regular spaces, and trims excessive
  77          * whitespace down to at most one whitespace between non-whitespace
  78          * characters.
  79          *
  80          * @param text The text to normalize
  81          * @return The normalized text
  82          */
  83         public String normalizeWhitespace(String text) {
  84                 StringBuffer buf = new StringBuffer();
  85                 boolean previousWasWhitespace = false;
  86                 for (int i = 0; i < text.length(); i++) {
  87                         char c = text.charAt(i);
  88                         if ((c == 9) || (c == 10) || (c == 13)) { // Tab
  89                                 c = ' ';
  90                         }
  91                         if ((c != ' ') || !previousWasWhitespace) {
  92                                 buf.append(c);
  93                         }
  94                         previousWasWhitespace = (c == ' ');
  95                 }
  96                 return buf.toString();
  97         }
  98
  99 }