com.github.gumtreediff.gen.css.CssTreeGenerator Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of gen.css Show documentation
GumTree tree generator for CSS code based on ph-css.
The newest version!
/*
 * This file is part of GumTree.
 *
 * GumTree 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.
 *
 * GumTree 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 Lesser General Public License
 * along with GumTree.  If not, see .
 *
 * Copyright 2016 Jean-Rémy Falleri 
 */

package com.github.gumtreediff.gen.css;

import com.github.gumtreediff.gen.Register;
import com.github.gumtreediff.utils.Registry;
import com.github.gumtreediff.gen.SyntaxException;
import com.github.gumtreediff.gen.TreeGenerator;
import com.github.gumtreediff.io.LineReader;
import com.github.gumtreediff.tree.TreeContext;
import com.helger.css.ECSSVersion;
import com.helger.css.decl.CascadingStyleSheet;
import com.helger.css.decl.visit.CSSVisitor;
import com.helger.css.handler.CSSHandler;
import com.helger.css.parser.*;
import com.helger.css.reader.CSSReader;

import java.io.*;

@Register(id = "css-phcss", accept = {"\\.css$"}, priority = Registry.Priority.MAXIMUM)
public class CssTreeGenerator extends TreeGenerator {
    @Override
    public TreeContext generate(Reader r) throws IOException {
        LineReader lr = new LineReader(r);
        CSSCharStream s = new CSSCharStream(new LineReader(lr));
        s.setTabSize(1);
        final ParserCSS30TokenManager th = new ParserCSS30TokenManager(s);
        final ParserCSS30 p = new ParserCSS30(th);
        p.setCustomErrorHandler(null);
        p.setBrowserCompliantMode(false);
        try {
            CascadingStyleSheet sheet = CSSHandler.readCascadingStyleSheetFromNode(
                    ECSSVersion.LATEST,
                    CSSReader.getDefaultInterpretErrorHandler(),
                    true,
                    p.styleSheet());
            GtCssVisitor v = new GtCssVisitor(sheet, lr);
            CSSVisitor.visitCSS(sheet, v);
            return v.getTreeContext();
        }
        catch (ParseException e) {
            throw new SyntaxException(this, r, e);
        }
    }
}