Applied-Energistics-2-tilera-Edition/src/main/java/appeng/transformer/MissingCoreMod.java

/*
 * This file is part of Applied Energistics 2.
 * Copyright (c) 2013 - 2014, AlgorithmX2, All rights reserved.
 *
 * Applied Energistics 2 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.
 *
 * Applied Energistics 2 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 Applied Energistics 2.  If not, see <http://www.gnu.org/licenses/lgpl>.
 */

package appeng.transformer;

import cpw.mods.fml.client.CustomModLoadingErrorDisplayException;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;
import net.minecraft.client.gui.FontRenderer;
import net.minecraft.client.gui.GuiErrorScreen;

@SideOnly(Side.CLIENT)
public final class MissingCoreMod extends CustomModLoadingErrorDisplayException {
    private static final int SHADOW_WHITE = 0xeeeeee;
    private static final int COLOR_WHITE = 0xffffff;
    private static final long serialVersionUID = -966774766922821652L;
    private static final int SCREEN_OFFSET = 15;

    private boolean deobf = false;

    @Override
    public void
    initGui(final GuiErrorScreen errorScreen, final FontRenderer fontRenderer) {
        final Class<?> clz = errorScreen.getClass();
        try {
            clz.getField("mc");
            this.deobf = true;
        } catch (final Throwable ignored) {}
    }

    @Override
    public void drawScreen(
        final GuiErrorScreen errorScreen,
        final FontRenderer fontRenderer,
        final int mouseRelX,
        final int mouseRelY,
        final float tickTime
    ) {
        int offset = 10;
        this.drawCenteredString(
            fontRenderer,
            "Sorry, couldn't load AE2 properly.",
            errorScreen.width / 2,
            offset,
            COLOR_WHITE
        );

        offset += SCREEN_OFFSET;
        this.drawCenteredString(
            fontRenderer,
            "Please make sure that AE2 is installed into your mods folder.",
            errorScreen.width / 2,
            offset,
            SHADOW_WHITE
        );

        offset += 2 * SCREEN_OFFSET;

        if (this.deobf) {
            offset += SCREEN_OFFSET;
            this.drawCenteredString(
                fontRenderer,
                "In a developer environment add the following too your args,",
                errorScreen.width / 2,
                offset,
                COLOR_WHITE
            );

            offset += SCREEN_OFFSET;
            this.drawCenteredString(
                fontRenderer,
                "-Dfml.coreMods.load=appeng.transformer.AppEngCore",
                errorScreen.width / 2,
                offset,
                SHADOW_WHITE
            );
        } else {
            this.drawCenteredString(
                fontRenderer,
                "You're launcher may refer to this by different names,",
                errorScreen.width / 2,
                offset,
                COLOR_WHITE
            );

            offset += SCREEN_OFFSET + 5;

            this.drawCenteredString(
                fontRenderer,
                "MultiMC calls this tab \"Loader Mods\"",
                errorScreen.width / 2,
                offset,
                SHADOW_WHITE
            );

            offset += SCREEN_OFFSET;
            this.drawCenteredString(
                fontRenderer,
                "Magic Launcher calls this tab \"External Mods\"",
                errorScreen.width / 2,
                offset,
                SHADOW_WHITE
            );

            offset += SCREEN_OFFSET;
            this.drawCenteredString(
                fontRenderer,
                "Most other launchers refer to this tab as just \"Mods\"",
                errorScreen.width / 2,
                offset,
                SHADOW_WHITE
            );

            offset += 2 * SCREEN_OFFSET;
            this.drawCenteredString(
                fontRenderer,
                "Also make sure that the AE2 file is a .jar, and not a .zip",
                errorScreen.width / 2,
                offset,
                COLOR_WHITE
            );
        }
    }

    private void drawCenteredString(
        final FontRenderer fontRenderer,
        final String string,
        final int x,
        final int y,
        final int colour
    ) {
        final String reEncoded = string.replaceAll("\\P{InBasic_Latin}", "");
        final int reEncodedWidth = fontRenderer.getStringWidth(reEncoded);
        final int centeredX = x - reEncodedWidth / 2;

        fontRenderer.drawStringWithShadow(string, centeredX, y, colour);
    }
}