/*
* 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.editor;
import com.intellij.lexer.Lexer;
import com.intellij.openapi.editor.DefaultLanguageHighlighterColors;
import com.intellij.openapi.editor.colors.TextAttributesKey;
import com.intellij.openapi.editor.markup.EffectType;
import com.intellij.openapi.editor.markup.TextAttributes;
import com.intellij.openapi.fileTypes.SyntaxHighlighterBase;
import com.intellij.psi.TokenType;
import com.intellij.psi.tree.IElementType;
import org.intellij.grammar.BnfParserDefinition;
import org.intellij.grammar.parser.BnfLexer;
import org.jetbrains.annotations.NotNull;
import static com.intellij.openapi.editor.colors.TextAttributesKey.createTextAttributesKey;
import static org.intellij.grammar.psi.BnfTypes.*;
/**
* @author gregsh
*/
class BnfSyntaxHighlighter extends SyntaxHighlighterBase {
public static final TextAttributesKey ILLEGAL = createTextAttributesKey("BNF_ILLEGAL", DefaultLanguageHighlighterColors.INVALID_STRING_ESCAPE);
public static final TextAttributesKey COMMENT = createTextAttributesKey("BNF_COMMENT", DefaultLanguageHighlighterColors.LINE_COMMENT);
public static final TextAttributesKey STRING = createTextAttributesKey("BNF_STRING", DefaultLanguageHighlighterColors.STRING);
public static final TextAttributesKey PATTERN = createTextAttributesKey("BNF_PATTERN", DefaultLanguageHighlighterColors.INSTANCE_FIELD);
public static final TextAttributesKey NUMBER = createTextAttributesKey("BNF_NUMBER", DefaultLanguageHighlighterColors.NUMBER);
public static final TextAttributesKey KEYWORD = createTextAttributesKey("BNF_KEYWORD", DefaultLanguageHighlighterColors.MARKUP_ATTRIBUTE);
public static final TextAttributesKey TOKEN = createTextAttributesKey("BNF_TOKEN", DefaultLanguageHighlighterColors.STRING);
public static final TextAttributesKey RULE = createTextAttributesKey("BNF_RULE", DefaultLanguageHighlighterColors.KEYWORD);
public static final TextAttributesKey META_RULE = createTextAttributesKey("BNF_META_RULE", DefaultLanguageHighlighterColors.KEYWORD);
public static final TextAttributesKey META_PARAM = createTextAttributesKey("BNF_META_RULE_PARAM");
public static final TextAttributesKey ATTRIBUTE = createTextAttributesKey("BNF_ATTRIBUTE", DefaultLanguageHighlighterColors.INTERFACE_NAME);
public static final TextAttributesKey EXTERNAL = createTextAttributesKey("BNF_EXTERNAL", DefaultLanguageHighlighterColors.STATIC_METHOD);
public static final TextAttributesKey PARENTHS = createTextAttributesKey("BNF_PARENTHS", DefaultLanguageHighlighterColors.PARENTHESES);
public static final TextAttributesKey BRACES = createTextAttributesKey("BNF_BRACES", DefaultLanguageHighlighterColors.BRACES);
public static final TextAttributesKey BRACKETS = createTextAttributesKey("BNF_BRACKETS", DefaultLanguageHighlighterColors.BRACKETS);
public static final TextAttributesKey ANGLES = createTextAttributesKey("BNF_ANGLES", DefaultLanguageHighlighterColors.PARENTHESES);
public static final TextAttributesKey OP_SIGN = createTextAttributesKey("BNF_OP_SIGN", DefaultLanguageHighlighterColors.OPERATION_SIGN);
public static final TextAttributesKey RECOVER_MARKER = createTextAttributesKey("BNF_RECOVER_MARKER");
public static final TextAttributesKey PIN_MARKER = createTextAttributesKey(
"BNF_PIN", new TextAttributes(null, null, DefaultLanguageHighlighterColors.LINE_COMMENT.getDefaultAttributes().getForegroundColor(), EffectType.BOLD_DOTTED_LINE, 0));
@NotNull
@Override
public Lexer getHighlightingLexer() {
return new BnfLexer();
}
@NotNull
@Override
public TextAttributesKey[] getTokenHighlights(IElementType type) {
if (type == TokenType.BAD_CHARACTER) {
return pack(ILLEGAL);
}
if (type == BnfParserDefinition.BNF_LINE_COMMENT || type == BnfParserDefinition.BNF_BLOCK_COMMENT) {
return pack(COMMENT);
}
if (type == BNF_STRING) {
return pack(STRING);
}
if (type == BNF_NUMBER) {
return pack(NUMBER);
}
if (type == BNF_OP_ONEMORE || type == BNF_OP_AND || type == BNF_OP_EQ || type == BNF_OP_IS ||
type == BNF_OP_NOT || type == BNF_OP_OPT || type == BNF_OP_OR || type == BNF_OP_ZEROMORE) {
return pack(OP_SIGN);
}
if (type == BNF_LEFT_PAREN || type == BNF_RIGHT_PAREN) {
return pack(PARENTHS);
}
if (type == BNF_LEFT_BRACE || type == BNF_RIGHT_BRACE) {
return pack(BRACES);
}
if (type == BNF_LEFT_BRACKET || type == BNF_RIGHT_BRACKET) {
return pack(BRACKETS);
}
if (type == BNF_EXTERNAL_START || type == BNF_EXTERNAL_END) {
return pack(ANGLES);
}
return EMPTY;
}
}