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

   1 /*
   2  * Copyright (c) 2005 Your Corporation. All Rights Reserved.
   3  */
   4 package com.intellij.openapi.editor.impl;
   5
   6 import com.intellij.openapi.editor.Document;
   7 import com.intellij.openapi.editor.ex.MarkupModelEx;
   8 import com.intellij.openapi.editor.impl.event.MarkupModelListener;
   9 import com.intellij.openapi.editor.markup.HighlighterTargetArea;
  10 import com.intellij.openapi.editor.markup.RangeHighlighter;
  11 import com.intellij.openapi.editor.markup.TextAttributes;
  12 import com.intellij.openapi.util.Key;
  13 import org.jetbrains.annotations.NotNull;
  14 import org.jetbrains.annotations.Nullable;
  15
  16 /**
  17  * This is mock implementation to be used in null-object pattern where necessary.
  18  * @author max
  19  */
  20 public class EmptyMarkupModel implements MarkupModelEx {
  21   private final Document myDocument;
  22
  23   public EmptyMarkupModel(final Document document) {
  24     myDocument = document;
  25   }
  26
  27   @NotNull
  28   public Document getDocument() {
  29     return myDocument;
  30   }
  31
  32   @NotNull
  33   public RangeHighlighter addRangeHighlighter(int startOffset,
  34                                               int endOffset,
  35                                               int layer,
  36                                               @Nullable TextAttributes textAttributes,
  37                                               @NotNull HighlighterTargetArea targetArea) {
  38     return new RangeHighlighterImpl(this, startOffset, endOffset, layer, targetArea, textAttributes, false);
  39   }
  40
  41   @NotNull
  42   public RangeHighlighter addLineHighlighter(int line, int layer, @Nullable TextAttributes textAttributes) {
  43     return new RangeHighlighterImpl(this, 0, 0, layer, HighlighterTargetArea.LINES_IN_RANGE, textAttributes, false);
  44   }
  45
  46   public void removeHighlighter(RangeHighlighter rangeHighlighter) {
  47   }
  48
  49   public void removeAllHighlighters() {
  50   }
  51
  52   @NotNull
  53   public RangeHighlighter[] getAllHighlighters() {
  54     return RangeHighlighter.EMPTY_ARRAY;
  55   }
  56
  57   public <T> T getUserData(Key<T> key) {
  58     return null;
  59   }
  60
  61   public <T> void putUserData(Key<T> key, T value) {
  62   }
  63
  64   public void dispose() {
  65   }
  66
  67   public HighlighterList getHighlighterList() {
  68     return null;
  69   }
  70
  71   public RangeHighlighter addPersistentLineHighlighter(int lineNumber, int layer, TextAttributes textAttributes) {
  72     return null;
  73   }
  74
  75   public boolean containsHighlighter(RangeHighlighter highlighter) {
  76     return false;
  77   }
  78
  79   public void addMarkupModelListener(MarkupModelListener listener) {
  80   }
  81
  82   public void removeMarkupModelListener(MarkupModelListener listener) {
  83   }
  84
  85   public void setRangeHighlighterAttributes(final RangeHighlighter highlighter, final TextAttributes textAttributes) {
  86
  87   }
  88 }