GLSLHighlighter.java

/*
 *     Copyright 2010 Jean-Paul Balabanian and Yngve Devik Hammersland
 *
 *     This file is part of glsl4idea.
 *
 *     Glsl4idea is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU Lesser General Public License as
 *     published by the Free Software Foundation, either version 3 of
 *     the License, or (at your option) any later version.
 *
 *     Glsl4idea is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU Lesser General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with glsl4idea.  If not, see <http://www.gnu.org/licenses/>.
 */

package glslplugin;

import com.intellij.lexer.Lexer;
import com.intellij.openapi.editor.DefaultLanguageHighlighterColors;
import com.intellij.openapi.editor.HighlighterColors;
import com.intellij.openapi.editor.colors.TextAttributesKey;
import com.intellij.openapi.fileTypes.SyntaxHighlighterBase;
import com.intellij.psi.tree.IElementType;
import glslplugin.lang.scanner.GLSLFlexAdapter;
import org.jetbrains.annotations.NotNull;

import static glslplugin.lang.elements.GLSLElementTypes.RedefinedTokenElementType;
import static glslplugin.lang.elements.GLSLTokenTypes.*;

public class GLSLHighlighter extends SyntaxHighlighterBase {

    static final TextAttributesKey[] GLSL_NUMBER =
            { TextAttributesKey.createTextAttributesKey("GLSL.NUMBER", DefaultLanguageHighlighterColors.NUMBER) };
    static final TextAttributesKey[] GLSL_TYPE_SPECIFIER =
            { TextAttributesKey.createTextAttributesKey("GLSL.TYPE_SPECIFIER", DefaultLanguageHighlighterColors.CLASS_REFERENCE) };
    static final TextAttributesKey[] GLSL_TYPE_QUALIFIERS =
            { TextAttributesKey.createTextAttributesKey("GLSL.QUALIFIER_TOKENS", DefaultLanguageHighlighterColors.KEYWORD) };
    static final TextAttributesKey[] GLSL_FLOW_KEYWORDS =
            { TextAttributesKey.createTextAttributesKey("GLSL.FLOW_KEYWORDS", DefaultLanguageHighlighterColors.KEYWORD) };
    static final TextAttributesKey[] GLSL_BLOCK_COMMENT =
            { TextAttributesKey.createTextAttributesKey("GLSL.BLOCK_COMMENT", DefaultLanguageHighlighterColors.BLOCK_COMMENT) };
    static final TextAttributesKey[] GLSL_LINE_COMMENT =
            { TextAttributesKey.createTextAttributesKey("GLSL.LINE_COMMENT", DefaultLanguageHighlighterColors.LINE_COMMENT) };
    static final TextAttributesKey[] GLSL_BRACES =
            { TextAttributesKey.createTextAttributesKey("GLSL.BRACES", DefaultLanguageHighlighterColors.BRACES) };
    static final TextAttributesKey[] GLSL_DOT =
            { TextAttributesKey.createTextAttributesKey("GLSL.DOT", DefaultLanguageHighlighterColors.DOT) };
    static final TextAttributesKey[] GLSL_SEMICOLON =
            { TextAttributesKey.createTextAttributesKey("GLSL.SEMICOLON", DefaultLanguageHighlighterColors.SEMICOLON) };
    static final TextAttributesKey[] GLSL_COMMA =
            { TextAttributesKey.createTextAttributesKey("GLSL.COMMA", DefaultLanguageHighlighterColors.COMMA) };
    static final TextAttributesKey[] GLSL_PARENS =
            { TextAttributesKey.createTextAttributesKey("GLSL.PARENS", DefaultLanguageHighlighterColors.PARENTHESES) };
    static final TextAttributesKey[] GLSL_BRACKETS =
            { TextAttributesKey.createTextAttributesKey("GLSL.BRACKETS", DefaultLanguageHighlighterColors.BRACKETS) };
    static final TextAttributesKey[] GLSL_IDENTIFIER =
            { TextAttributesKey.createTextAttributesKey("GLSL.IDENTIFIER", DefaultLanguageHighlighterColors.IDENTIFIER) };
    public static final TextAttributesKey[] GLSL_IDENTIFIER_UNIFORM =
            { TextAttributesKey.createTextAttributesKey("GLSL.IDENTIFIER.UNIFORM", GLSL_IDENTIFIER[0]) };
    public static final TextAttributesKey[] GLSL_IDENTIFIER_VARYING =
            { TextAttributesKey.createTextAttributesKey("GLSL.IDENTIFIER.VARYING", GLSL_IDENTIFIER[0]) };
    public static final TextAttributesKey[] GLSL_IDENTIFIER_ATTRIBUTE =
            { TextAttributesKey.createTextAttributesKey("GLSL.IDENTIFIER.ATTRIBUTE", GLSL_IDENTIFIER[0]) };
    static final TextAttributesKey[] GLSL_PREPROCESSOR_DIRECTIVE =
            { TextAttributesKey.createTextAttributesKey("GLSL.PREPROCESSOR_DIRECTIVE", DefaultLanguageHighlighterColors.METADATA) };
    public static final TextAttributesKey[] GLSL_REDEFINED_TOKEN =
            { TextAttributesKey.createTextAttributesKey("GLSL.REDEFINED_TOKEN", DefaultLanguageHighlighterColors.METADATA) };
    static final TextAttributesKey[] GLSL_STRING =
            { TextAttributesKey.createTextAttributesKey("GLSL.STRING", DefaultLanguageHighlighterColors.STRING) };
    static final TextAttributesKey[] GLSL_UNKNOWN =
            { TextAttributesKey.createTextAttributesKey("GLSL.UNKNOWN", HighlighterColors.BAD_CHARACTER) };
    static final TextAttributesKey[] GLSL_TEXT =
            { TextAttributesKey.createTextAttributesKey("GLSL.TEXT", HighlighterColors.TEXT) };

    @NotNull
    public Lexer getHighlightingLexer() {
        return new GLSLFlexAdapter();
    }

    @NotNull
    public TextAttributesKey[] getTokenHighlights(IElementType type) {
        if(type == WHITE_SPACE) return GLSL_TEXT;
        if (CONSTANT_TOKENS.contains(type)) return GLSL_NUMBER;
        if (type == COMMENT_BLOCK) return GLSL_BLOCK_COMMENT;
        if (type == COMMENT_LINE) return GLSL_LINE_COMMENT;
        if (type == IDENTIFIER) return GLSL_IDENTIFIER;
        if (type == LEFT_BRACE || type == RIGHT_BRACE) return GLSL_BRACES;
        if (type == DOT) return GLSL_DOT;
        if (type == SEMICOLON) return GLSL_SEMICOLON;
        if (type == COMMA) return GLSL_COMMA;
        if (type == LEFT_PAREN || type == RIGHT_PAREN) return GLSL_PARENS;
        if (type == LEFT_BRACKET || type == RIGHT_BRACKET) return GLSL_BRACKETS;
        if (PREPROCESSOR_DIRECTIVES.contains(type)) return GLSL_PREPROCESSOR_DIRECTIVE;
        if (TYPE_SPECIFIER_NONARRAY_TOKENS.contains(type)) return GLSL_TYPE_SPECIFIER;
        if (QUALIFIER_TOKENS.contains(type)) return GLSL_TYPE_QUALIFIERS;
        if (FLOW_KEYWORDS.contains(type)) return GLSL_FLOW_KEYWORDS;
        if (type == PRECISION_KEYWORD) return GLSL_FLOW_KEYWORDS;
        if (type == PREPROCESSOR_STRING) return GLSL_STRING;
        if (type == UNKNOWN) return GLSL_UNKNOWN;
        if (type == RESERVED_KEYWORD) return GLSL_FLOW_KEYWORDS;
        if (type instanceof RedefinedTokenElementType /*== REDEFINED_TOKEN*/) return GLSL_REDEFINED_TOKEN;
        return GLSL_TEXT;
    }
}