/*
* Copyright 2011-2014 Gregory Shrago
*
* 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 org.intellij.grammar.livePreview;
import com.intellij.lang.Language;
import com.intellij.lexer.Lexer;
import com.intellij.openapi.editor.DefaultLanguageHighlighterColors;
import com.intellij.openapi.editor.colors.TextAttributesKey;
import com.intellij.openapi.fileTypes.PlainSyntaxHighlighter;
import com.intellij.openapi.fileTypes.SyntaxHighlighter;
import com.intellij.openapi.fileTypes.SyntaxHighlighterBase;
import com.intellij.openapi.fileTypes.SyntaxHighlighterFactory;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.TokenType;
import com.intellij.psi.tree.IElementType;
import com.intellij.testFramework.LightVirtualFile;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
/**
* @author gregsh
*/
public class LivePreviewSyntaxHighlighterFactory extends SyntaxHighlighterFactory {
public LivePreviewSyntaxHighlighterFactory() {
}
@NotNull
@Override
public SyntaxHighlighter getSyntaxHighlighter(@Nullable final Project project, @Nullable VirtualFile virtualFile) {
final Language language = virtualFile instanceof LightVirtualFile ? ((LightVirtualFile)virtualFile).getLanguage() : null;
if (!(language instanceof LivePreviewLanguage)) return new PlainSyntaxHighlighter();
return new SyntaxHighlighterBase() {
@NotNull
@Override
public Lexer getHighlightingLexer() {
return new LivePreviewLexer(project, (LivePreviewLanguage)language) {
@Nullable
@Override
public IElementType getTokenType() {
IElementType tokenType = super.getTokenType();
return tokenType instanceof PreviewTokenType ? ((PreviewTokenType)tokenType).delegate : tokenType;
}
};
}
@NotNull
@Override
public TextAttributesKey[] getTokenHighlights(IElementType tokenType) {
if (tokenType == LivePreviewParserDefinition.COMMENT) return pack(DefaultLanguageHighlighterColors.LINE_COMMENT);
if (tokenType == LivePreviewParserDefinition.STRING) return pack(DefaultLanguageHighlighterColors.STRING);
if (tokenType == LivePreviewParserDefinition.NUMBER) return pack(DefaultLanguageHighlighterColors.NUMBER);
if (tokenType == LivePreviewParserDefinition.KEYWORD) return pack(DefaultLanguageHighlighterColors.KEYWORD);
if (tokenType == TokenType.BAD_CHARACTER) return pack(DefaultLanguageHighlighterColors.INVALID_STRING_ESCAPE);
return EMPTY;
}
};
}
}