platform/platform-impl/src/com/intellij/openapi/editor/impl/FoldRegionImpl.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 /*
  18  * Created by IntelliJ IDEA.
  19  * User: max
  20  * Date: Apr 22, 2002
  21  * Time: 5:51:22 PM
  22  * To change template for new class use
  23  * Code Style | Class Templates options (Tools | IDE Options).
  24  */
  25 package com.intellij.openapi.editor.impl;
  26
  27 import com.intellij.openapi.editor.Editor;
  28 import com.intellij.openapi.editor.FoldRegion;
  29 import com.intellij.openapi.editor.FoldingGroup;
  30 import com.intellij.openapi.editor.ex.DocumentEx;
  31 import org.jetbrains.annotations.NotNull;
  32 import org.jetbrains.annotations.Nullable;
  33
  34 public class FoldRegionImpl extends RangeMarkerImpl implements FoldRegion {
  35   private boolean myIsExpanded;
  36   private final Editor myEditor;
  37   private final String myPlaceholderText;
  38   private final FoldingGroup myGroup;
  39
  40   public FoldRegionImpl(Editor editor, int startOffset, int endOffset, String placeholder, FoldingGroup group) {
  41     super((DocumentEx)editor.getDocument(), startOffset, endOffset);
  42     myGroup = group;
  43     myIsExpanded = true;
  44     myEditor = editor;
  45     myPlaceholderText = placeholder;
  46   }
  47
  48   public boolean isExpanded() {
  49     return myIsExpanded;
  50   }
  51
  52   public void setExpanded(boolean expanded) {
  53     FoldingModelImpl foldingModel = (FoldingModelImpl)myEditor.getFoldingModel();
  54     if (myGroup == null) {
  55       doSetExpanded(expanded, foldingModel, this);
  56     } else {
  57       for (final FoldRegion region : foldingModel.getGroupedRegions(myGroup)) {
  58         doSetExpanded(expanded, foldingModel, region);
  59       }
  60     }
  61   }
  62
  63   private static void doSetExpanded(boolean expanded, FoldingModelImpl foldingModel, FoldRegion region) {
  64     if (expanded) {
  65       foldingModel.expandFoldRegion(region);
  66     }
  67     else{
  68       foldingModel.collapseFoldRegion(region);
  69     }
  70   }
  71
  72   public boolean isValid() {
  73     return super.isValid() && getStartOffset() + 1 < getEndOffset();
  74   }
  75
  76   public void setExpandedInternal(boolean toExpand) {
  77     myIsExpanded = toExpand;
  78   }
  79
  80   @NotNull
  81   public String getPlaceholderText() {
  82     return myPlaceholderText;
  83   }
  84
  85   public Editor getEditor() {
  86     return myEditor;
  87   }
  88
  89   @Nullable
  90   public FoldingGroup getGroup() {
  91     return myGroup;
  92   }
  93
  94   @SuppressWarnings({"HardCodedStringLiteral"})
  95   public String toString() {
  96     return "FoldRegion (" + getStartOffset() + ":" + getEndOffset() + ")";
  97   }
  98 }