PageText.java

/**
 * This class was created by <Vazkii>. It's distributed as
 * part of the Botania Mod. Get the Source Code in github:
 * https://github.com/Vazkii/Botania
 *
 * Botania is Open Source and distributed under the
 * Botania License: http://botaniamod.net/license.php
 *
 * File Created @ [Jan 14, 2014, 6:45:33 PM (GMT)]
 */
package vazkii.botania.common.lexicon.page;

import java.util.ArrayList;
import java.util.List;

import com.google.common.base.Joiner;

import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.FontRenderer;
import net.minecraft.client.resources.I18n;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;
import vazkii.botania.api.internal.IGuiLexiconEntry;
import vazkii.botania.api.lexicon.LexiconPage;
import vazkii.botania.common.core.handler.ConfigHandler;

public class PageText extends LexiconPage {

	public PageText(String unlocalizedName) {
		super(unlocalizedName);
	}

	@Override
	@SideOnly(Side.CLIENT)
	public void renderScreen(IGuiLexiconEntry gui, int mx, int my) {
		int width = gui.getWidth() - 30;
		int x = gui.getLeft() + 16;
		int y = gui.getTop() + 2;

		renderText(x, y, width, gui.getHeight(), getUnlocalizedName());
	}

	public static void renderText(int x, int y, int width, int height, String unlocalizedText) {
		renderText(x, y, width, height, 10, true, 0, unlocalizedText);
	}

	@SideOnly(Side.CLIENT)
	public static void renderText(int x, int y, int width, int height, int paragraphSize, boolean useUnicode, int color, String unlocalizedText) {
		x += 2;
		y += 10;
		width -= 4;

		FontRenderer font = Minecraft.getMinecraft().fontRendererObj;
		boolean unicode = font.getUnicodeFlag();
		if(useUnicode)
			font.setUnicodeFlag(true);
		String text = I18n.format(unlocalizedText).replaceAll("&", "\u00a7");
		String[] textEntries = text.split("<br>");

		List<List<String>> lines = new ArrayList<>();

		String controlCodes;
		for(String s : textEntries) {
			List<String> words = new ArrayList<>();
			String lineStr = "";
			String[] tokens = s.split(" ");
			for(String token : tokens) {
				String prev = lineStr;
				String spaced = token + " ";
				lineStr += spaced;

				controlCodes = toControlCodes(getControlCodes(prev));
				if(font.getStringWidth(lineStr) > width) {
					lines.add(words);
					lineStr = controlCodes + spaced;
					words = new ArrayList<>();
				}

				words.add(controlCodes + token);
			}

			if(!lineStr.isEmpty())
				lines.add(words);
			lines.add(new ArrayList<>());
		}

		int i = 0;
		for(List<String> words : lines) {
			words.size();
			int xi = x;
			int spacing = 4;
			int wcount = words.size();
			int compensationSpaces = 0;
			boolean justify = ConfigHandler.lexiconJustifiedText && wcount > 0 && lines.size() > i && !lines.get(i + 1).isEmpty();

			if(justify) {
				String s = Joiner.on("").join(words);
				int swidth = font.getStringWidth(s);
				int space = width - swidth;

				spacing = wcount == 1 ? 0 : space / (wcount - 1);
				compensationSpaces = wcount == 1 ? 0 : space % (wcount - 1);
			}

			for(String s : words) {
				int extra = 0;
				if(compensationSpaces > 0) {
					compensationSpaces--;
					extra++;
				}
				font.drawString(s, xi, y, color);
				xi += font.getStringWidth(s) + spacing + extra;
			}

			y += words.isEmpty() ? paragraphSize : 10;
			i++;
		}

		font.setUnicodeFlag(unicode);
	}

	private static String getControlCodes(String s) {
		String controls = s.replaceAll("(?<!\u00a7)(.)", "");
		return controls.replaceAll(".*r", "r");
	}

	private static String toControlCodes(String s) {
		return s.replaceAll(".", "\u00a7$0");
	}

}