[1.11.2] Multi-line textbox cursor behaving funny

[Silly511]

I have a gui with a multi-line textbox that works when typing text, deleting text, etc. but the cursor behaves very weirdly. When I press the right arrow key and I'm at the end of a line it appears to work(as in the cursor doesn't move past the end of the line) but if I press the right arrow key a bunch of times, and then press the left arrow key, the cursor doesn't move as if the cursor position is off the end of the line but the cursor isn't rendered off the line. Same thing happens at the beginning of a line, when I press the left arrow key it appears to stay but if I press the right arrow key the cursor doesn't move. If I put print statements before I change the cursorX and after, it seems cursorX is not going higher than or lower than it's supposed to but instead it's setting itself to back one and then forward one. I have no clue what is happening, or even how to explain it in a good way. Heres my keyTyped method in my GUI class:

 

	@Override
	protected void keyTyped(char typedChar, int keyCode) throws IOException {
		if (keyCode == Keyboard.KEY_ESCAPE) {
			this.mc.displayGuiScreen(null);
		} else if (keyCode == Keyboard.KEY_UP && this.cursorY > 0) {
			this.cursorY--;
			this.cursorX = MathHelper.clamp(this.cursorX, 0, this.text.get(cursorY).length());
		} else if (keyCode == Keyboard.KEY_DOWN && this.cursorY < this.text.size() - 1) {
			this.cursorY++;
			this.cursorX = MathHelper.clamp(this.cursorX, 0, this.text.get(cursorY).length());
		} else if (keyCode == Keyboard.KEY_LEFT && this.cursorX > 0) {
			this.cursorX--;
		} else if (keyCode == Keyboard.KEY_RIGHT && this.cursorX < this.text.get(cursorY).length()) {
			this.cursorX++;
		} else if (keyCode == Keyboard.KEY_RETURN) {
			String line = text.get(cursorY);
			
			text.set(cursorY, line.substring(0, cursorX));
			text.add(cursorY + 1, line.substring(cursorX, line.length()));
			
			cursorY++;
			cursorX = 0;
		} else if (keyCode == Keyboard.KEY_BACK && cursorX > 0) {
			cursorX--;
			
			text.set(cursorY, new StringBuilder(text.get(cursorY)).deleteCharAt(cursorX).toString());
		} else if (ChatAllowedCharacters.isAllowedCharacter(typedChar)) {
			String line = text.get(cursorY);
			
			if (line.length() + 1 > 255) return;
			
			text.set(cursorY, new StringBuilder(line).insert(cursorX, typedChar).toString());
			cursorX++;
		}
	}

 

What's really odd is deleting works perfectly fine, it's only the arrow keys that don't work.

 

Heres my entire GUI class if you need it:

 

Spoiler

package silly511.aestheticeffect.gui;

import java.io.IOException;
import java.util.List;

import org.lwjgl.input.Keyboard;
import org.lwjgl.input.Mouse;

import com.google.common.collect.Lists;

import net.minecraft.client.gui.GuiButton;
import net.minecraft.client.gui.GuiScreen;
import net.minecraft.client.resources.I18n;
import net.minecraft.util.ChatAllowedCharacters;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.MathHelper;
import net.minecraft.world.World;
import silly511.aestheticeffect.tile.TileHologramProjector;

public class GuiHologramProjector extends GuiScreen {
	
	private List<String> text = Lists.newArrayList("");
	private int cursorX;
	private int cursorY;
	private int scroll;
	
	private BlockPos pos;
	private World world;
	private TileHologramProjector tile;
	
	public GuiHologramProjector(int x, int y, int z, World world) {
		this.pos = new BlockPos(x, y, z);
		this.world = world;
		this.tile = (TileHologramProjector) world.getTileEntity(pos);
	}

	@Override
	public void drawScreen(int mouseX, int mouseY, float partialTicks) {
		int x = 100;
		int y = 100;
		
		this.drawDefaultBackground();
		
		for (int i = 0; i < 15; i++) {
			if (i + scroll > text.size() - 1) break;
			
			this.mc.fontRendererObj.drawString(text.get(scroll + i), x, y + (mc.fontRendererObj.FONT_HEIGHT + 2) * i, 0xFFFFFF, false);
		}
		
		int lineWidth = this.mc.fontRendererObj.getStringWidth(text.get(cursorY).substring(0, cursorX)) + 1;
		this.mc.fontRendererObj.drawString("_", x + lineWidth, y + (mc.fontRendererObj.FONT_HEIGHT + 2) * (cursorY - scroll) + 2, 0xFFFFFF);
		
		super.drawScreen(mouseX, mouseY, partialTicks);
	}

	@Override
	protected void keyTyped(char typedChar, int keyCode) throws IOException {
		if (keyCode == Keyboard.KEY_ESCAPE) {
			this.mc.displayGuiScreen(null);
		} else if (keyCode == Keyboard.KEY_UP && this.cursorY > 0) {
			this.cursorY--;
			this.cursorX = MathHelper.clamp(this.cursorX, 0, this.text.get(cursorY).length());
		} else if (keyCode == Keyboard.KEY_DOWN && this.cursorY < this.text.size() - 1) {
			this.cursorY++;
			this.cursorX = MathHelper.clamp(this.cursorX, 0, this.text.get(cursorY).length());
		} else if (keyCode == Keyboard.KEY_LEFT && this.cursorX > 0) {
			this.cursorX--;
		} else if (keyCode == Keyboard.KEY_RIGHT && this.cursorX < this.text.get(cursorY).length()) {
			this.cursorX++;
		} else if (keyCode == Keyboard.KEY_RETURN) {
			String line = text.get(cursorY);
			
			text.set(cursorY, line.substring(0, cursorX));
			text.add(cursorY + 1, line.substring(cursorX, line.length()));
			
			cursorY++;
			cursorX = 0;
		} else if (keyCode == Keyboard.KEY_BACK && cursorX > 0) {
			cursorX--;
			
			text.set(cursorY, new StringBuilder(text.get(cursorY)).deleteCharAt(cursorX).toString());
		} else if (ChatAllowedCharacters.isAllowedCharacter(typedChar)) {
			String line = text.get(cursorY);
			
			if (line.length() + 1 > 255) return;
			
			text.set(cursorY, new StringBuilder(line).insert(cursorX, typedChar).toString());
			cursorX++;
		}
	}

	@Override
	public void handleMouseInput() throws IOException {
		int scrollDir = Mouse.getEventDWheel();
		
		if (scrollDir != 0) {
			if (this.scroll > 0 && scrollDir >= 1)
				this.scroll--;
			else if (this.scroll < text.size() - 1 && scrollDir <= -1)
				this.scroll++;
		}
		
		super.handleMouseInput();
	}

	@Override
	protected void actionPerformed(GuiButton button) throws IOException {
		if (button.id == 0) {
			this.mc.displayGuiScreen(null);
			//TODO
		}
	}

	@Override
	public void initGui() {
		Keyboard.enableRepeatEvents(true);
		
		this.addButton(new GuiButton(0, 0, 0, I18n.format("gui.done")));
	}

	@Override
	public void onGuiClosed() {
		Keyboard.enableRepeatEvents(false);
	}

	@Override
	public boolean doesGuiPauseGame() {
		return false;
	}

}