1 files changed, 108 insertions, 0 deletions
diff --git a/platform/usageView/src/com/intellij/usages/impl/SyntaxHighlighterOverEditorHighlighter.java b/platform/usageView/src/com/intellij/usages/impl/SyntaxHighlighterOverEditorHighlighter.java
new file mode 100644
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+++ b/platform/usageView/src/com/intellij/usages/impl/SyntaxHighlighterOverEditorHighlighter.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2000-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.usages.impl;
+
+import com.intellij.lexer.LayeredLexer;
+import com.intellij.lexer.Lexer;
+import com.intellij.openapi.editor.colors.TextAttributesKey;
+import com.intellij.openapi.editor.ex.util.LayeredHighlighterIterator;
+import com.intellij.openapi.editor.ex.util.LayeredLexerEditorHighlighter;
+import com.intellij.openapi.editor.highlighter.EditorHighlighter;
+import com.intellij.openapi.editor.highlighter.EditorHighlighterFactory;
+import com.intellij.openapi.editor.highlighter.HighlighterIterator;
+import com.intellij.openapi.fileTypes.PlainSyntaxHighlighter;
+import com.intellij.openapi.fileTypes.PlainTextFileType;
+import com.intellij.openapi.fileTypes.SyntaxHighlighter;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.psi.impl.search.LexerEditorHighlighterLexer;
+import com.intellij.psi.tree.IElementType;
+import org.jetbrains.annotations.NotNull;
+
+/**
+* Created by Maxim.Mossienko on 7/31/2014.
+*/
+public class SyntaxHighlighterOverEditorHighlighter implements SyntaxHighlighter {
+  private final Lexer lexer;
+  private LayeredHighlighterIterator layeredHighlighterIterator = null;
+  private final SyntaxHighlighter highlighter;
+
+  public SyntaxHighlighterOverEditorHighlighter(SyntaxHighlighter _highlighter, VirtualFile file, Project project) {
+    if (file.getFileType() == PlainTextFileType.INSTANCE) { // optimization for large files, PlainTextSyntaxHighlighterFactory is slow
+      highlighter = new PlainSyntaxHighlighter();
+      lexer = highlighter.getHighlightingLexer();
+    } else {
+      highlighter = _highlighter;
+      LayeredLexer.ourDisableLayersFlag.set(Boolean.TRUE);
+      EditorHighlighter editorHighlighter = EditorHighlighterFactory.getInstance().createEditorHighlighter(project, file);
+
+      try {
+        if (editorHighlighter instanceof LayeredLexerEditorHighlighter) {
+          lexer = new LexerEditorHighlighterLexer(editorHighlighter, false);
+        }
+        else {
+          lexer = highlighter.getHighlightingLexer();
+        }
+      }
+      finally {
+        LayeredLexer.ourDisableLayersFlag.set(null);
+      }
+    }
+  }
+
+  @NotNull
+  @Override
+  public Lexer getHighlightingLexer() {
+    return lexer;
+  }
+
+  @NotNull
+  @Override
+  public TextAttributesKey[] getTokenHighlights(IElementType tokenType) {
+    final SyntaxHighlighter activeSyntaxHighlighter =
+      layeredHighlighterIterator != null ? layeredHighlighterIterator.getActiveSyntaxHighlighter() : highlighter;
+    return activeSyntaxHighlighter.getTokenHighlights(tokenType);
+  }
+
+  public void restart(@NotNull CharSequence text) {
+    lexer.start(text);
+
+    if (lexer instanceof LexerEditorHighlighterLexer) {
+      HighlighterIterator iterator = ((LexerEditorHighlighterLexer)lexer).getHighlighterIterator();
+      if (iterator instanceof LayeredHighlighterIterator) {
+        layeredHighlighterIterator = (LayeredHighlighterIterator)iterator;
+      } else {
+        layeredHighlighterIterator = null;
+      }
+    }
+  }
+
+  public void resetPosition(int startOffset) {
+    if (lexer instanceof LexerEditorHighlighterLexer) {
+      ((LexerEditorHighlighterLexer)lexer).resetPosition(startOffset);
+
+      HighlighterIterator iterator = ((LexerEditorHighlighterLexer)lexer).getHighlighterIterator();
+      if (iterator instanceof LayeredHighlighterIterator) {
+        layeredHighlighterIterator = (LayeredHighlighterIterator)iterator;
+      } else {
+        layeredHighlighterIterator = null;
+      }
+    } else {
+      CharSequence text = lexer.getBufferSequence();
+      lexer.start(text, startOffset, text.length());
+    }
+  }
+}