package com.mojang.blaze3d.platform;

import com.mojang.blaze3d.GLFWErrorScope;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import net.minecraft.util.StringDecomposer;
import org.lwjgl.BufferUtils;
import org.lwjgl.glfw.GLFW;
import org.lwjgl.glfw.GLFWErrorCallbackI;
import org.lwjgl.system.MemoryUtil;

public class ClipboardManager {
	public static final int FORMAT_UNAVAILABLE = 65545;
	private final ByteBuffer clipboardScratchBuffer = BufferUtils.createByteBuffer(8192);

	public String getClipboard(final Window window, final GLFWErrorCallbackI errorCallback) {
		String var5;
		try (GLFWErrorScope ignored = new GLFWErrorScope(errorCallback)) {
			String clipboard = GLFW.glfwGetClipboardString(window.handle());
			clipboard = clipboard != null ? StringDecomposer.filterBrokenSurrogates(clipboard) : "";
			var5 = clipboard;
		}

		return var5;
	}

	private static void pushClipboard(final Window window, final ByteBuffer buffer, final byte[] data) {
		buffer.clear();
		buffer.put(data);
		buffer.put((byte)0);
		buffer.flip();
		GLFW.glfwSetClipboardString(window.handle(), buffer);
	}

	public void setClipboard(final Window window, final String clipboard) {
		byte[] encoded = clipboard.getBytes(StandardCharsets.UTF_8);
		int encodedLength = encoded.length + 1;
		if (encodedLength < this.clipboardScratchBuffer.capacity()) {
			pushClipboard(window, this.clipboardScratchBuffer, encoded);
		} else {
			ByteBuffer buffer = MemoryUtil.memAlloc(encodedLength);

			try {
				pushClipboard(window, buffer, encoded);
			} finally {
				MemoryUtil.memFree(buffer);
			}
		}
	}
}