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/*
* 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());
}
}
}
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