net.minecraftforge.gradle.util.mcp.GLConstantFixer Maven / Gradle / Ivy

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/*
 * A Gradle plugin for the creation of Minecraft mods and MinecraftForge plugins.
 * Copyright (C) 2013-2019 Minecraft Forge
 * Copyright (C) 2020-2021 anatawa12 and other contributors
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
 * USA
 */
package net.minecraftforge.gradle.util.mcp;

import java.io.IOException;
import java.nio.charset.Charset;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import net.minecraftforge.gradle.common.Constants;
import net.minecraftforge.gradle.util.json.GLConstantGroup;
import net.minecraftforge.gradle.util.json.JsonFactory;

import com.google.common.base.Joiner;
import com.google.common.io.Resources;
import com.google.gson.reflect.TypeToken;

public class GLConstantFixer
{
    //@formatter:off
    private static final String[] PACKAGES = {
            "GL11",
            "GL12",
            "GL13",
            "GL14",
            "GL15",
            "GL20",
            "GL21",
            "ARBMultitexture",
            "ARBOcclusionQuery",
            "ARBVertexBufferObject",
            "ARBShaderObjects"
    };
    //@formatter:on

    private final List json;
    private static final Pattern        CALL_REGEX     = Pattern.compile("(" + Joiner.on("|").join(PACKAGES) + ")\\.([\\w]+)\\(.+\\)");
    private static final Pattern        CONSTANT_REGEX = Pattern.compile("(?>() {}.getType());
    }

    public String fixOGL(String text)
    {
        // if it never uses openGL, ignore it.
        if (!text.contains(IMPORT_CHECK))
        {
            return text;
        }

        text = annotateConstants(text);

        for (String pack : PACKAGES)
        {
            if (text.contains(pack + "."))
            {
                text = updateImports(text, CHECK + pack);
            }
        }

        return text;
    }

    private String annotateConstants(String text)
    {
        Matcher rootMatch = CALL_REGEX.matcher(text);
        String pack, method, fullCall;
        StringBuffer out = new StringBuffer(text.length());
        StringBuffer innerOut;

        // search with regex.
        while (rootMatch.find())
        {
            // helper variables
            fullCall = rootMatch.group();
            pack = rootMatch.group(1);
            method = rootMatch.group(2);

            Matcher constantMatcher = CONSTANT_REGEX.matcher(fullCall);
            innerOut = new StringBuffer(fullCall.length());

            // search for hardcoded numbers
            while (constantMatcher.find())
            {
                // helper variables and return variable.
                String constant = constantMatcher.group();
                String answer = null;

                // iterrate over the JSON
                for (GLConstantGroup group : json)
                {

                    // ensure that the package and method are defined
                    if (group.functions.containsKey(pack) && group.functions.get(pack).contains(method))
                    {
                        // itterrate through the map.
                        for (Map.Entry> entry : group.constants.entrySet())
                        {
                            // find the actual constant for the number from the regex
                            if (entry.getValue().containsKey(constant))
                            {
                                // construct the final line
                                answer = entry.getKey() + "." + entry.getValue().get(constant);
                            }
                        }
                    }

                }

                // replace the final line.
                if (answer != null)
                {
                    constantMatcher.appendReplacement(innerOut, Matcher.quoteReplacement(answer));
                }
            }
            constantMatcher.appendTail(innerOut);

            // replace the final line.
            if (fullCall != null)
            {
                rootMatch.appendReplacement(out, Matcher.quoteReplacement(innerOut.toString()));
            }
        }
        rootMatch.appendTail(out);

        return out.toString();
    }

    private static String updateImports(String text, String imp)
    {
        if (!text.contains("import " + imp + ";"))
        {
            text = text.replace(IMPORT_REPLACE, IMPORT_REPLACE + Constants.NEWLINE + "import " + imp + ";");
        }

        return text;
    }

}