Mein Chat :D

package net.minecraft.client.gui;

import com.google.common.collect.Lists;

import de.cryptonicdev.cryptonic.main.Cryptonic;

import java.io.IOException;
import java.util.List;
import net.minecraft.network.play.client.C14PacketTabComplete;
import net.minecraft.util.BlockPos;
import net.minecraft.util.ChatComponentText;
import net.minecraft.util.IChatComponent;
import net.minecraft.util.MathHelper;
import net.minecraft.util.MovingObjectPosition;
import org.apache.commons.lang3.StringUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.lwjgl.input.Keyboard;
import org.lwjgl.input.Mouse;

public class GuiChat extends GuiScreen {
    private static final Logger logger = LogManager.getLogger();
    private String historyBuffer = "";
    private static boolean uft8mode = false;

    /**
     * keeps position of which chat message you will select when you press up, (does
     * not increase for duplicated messages sent immediately after each other)
     */
    private int sentHistoryCursor = -1;
    private boolean playerNamesFound;
    private boolean waitingOnAutocomplete;
    private int autocompleteIndex;
    private List<String> foundPlayerNames = Lists.<String>newArrayList();

    /** Chat entry field */
    protected GuiTextField inputField;

    /**
     * is the text that appears when you press the chat key and the input box
     * appears pre-filled
     */
    private String defaultInputFieldText = "";

    public GuiChat() {
    }

    public GuiChat(String defaultText) {
        this.defaultInputFieldText = defaultText;
    }

    /**
     * Adds the buttons (and other controls) to the screen in question. Called when
     * the GUI is displayed and when the window resizes, the buttonList is cleared
     * beforehand.
     */
    public void initGui() {
        Keyboard.enableRepeatEvents(true);
        this.sentHistoryCursor = this.mc.ingameGUI.getChatGUI().getSentMessages().size();
        this.inputField = new GuiTextField(0, this.fontRendererObj, 4, this.height - 12, this.width - 4 - 92, 12);
        this.inputField.setMaxStringLength(100);
        this.inputField.setEnableBackgroundDrawing(false);
        this.inputField.setFocused(true);
        this.inputField.setText(this.defaultInputFieldText);
        this.inputField.setCanLoseFocus(false);
        initButtons();
    }

    private void initButtons() {
        this.buttonList.add(new GuiButton(0, width - 28, height - 14, 26, 12, (uft8mode ? "§a" : "§c") + "Mode"));
        this.buttonList.add(new GuiButton(1, width - 28 - 2 - 28, height - 14, 26, 12, "§5❤"));
        this.buttonList.add(new GuiButton(2, width - 28 - 2 - 28 - 28 - 2, height - 14, 26, 12, "§5^-^"));
    }

    /**
     * Called when the screen is unloaded. Used to disable keyboard repeat events
     */
    public void onGuiClosed() {
        Keyboard.enableRepeatEvents(false);
        this.mc.ingameGUI.getChatGUI().resetScroll();
    }

    /**
     * Called from the main game loop to update the screen.
     */
    public void updateScreen() {
        this.inputField.updateCursorCounter();
    }

    /**
     * Fired when a key is typed (except F11 which toggles full screen). This is the
     * equivalent of KeyListener.keyTyped(KeyEvent e). Args : character (character
     * on the key), keyCode (lwjgl Keyboard key code)
     */
    protected void keyTyped(char typedChar, int keyCode) throws IOException {
        if (uft8mode) {
            char[] modeStyle = "ａｂｃｄｅｆｇｈｉｊｋｌｍｎｏｐｑｒｓｔｕｖｗｘｙｚＡＢＣＤＥＦＧＨＩＪＫＬＭＮＯＰＱＲＳＴＵＶＷＸＹＺ１２３４５６７８９０！\"§＄％＆／（）＝？´`＋＊＃＇－_．：，；^°<>|~"
                    .toCharArray();
            char[] alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890!\"§$%&/()=?´`+*#'-_.:,;^°<>|~"
                    .toCharArray();
            for (int i = 0; i < alphabet.length; i++) {
                char c = alphabet[i];
                if (c == typedChar) {
                    typedChar = modeStyle[i];
                }
            }
        }
        this.waitingOnAutocomplete = false;

        if (keyCode == 15) {
            this.autocompletePlayerNames();
        } else {
            this.playerNamesFound = false;
        }

        if (keyCode == 1) {
            this.mc.displayGuiScreen((GuiScreen) null);
        } else if (keyCode != 28 && keyCode != 156) {
            if (keyCode == 200) {
                this.getSentHistory(-1);
            } else if (keyCode == 208) {
                this.getSentHistory(1);
            } else if (keyCode == 201) {
                this.mc.ingameGUI.getChatGUI().scroll(this.mc.ingameGUI.getChatGUI().getLineCount() - 1);
            } else if (keyCode == 209) {
                this.mc.ingameGUI.getChatGUI().scroll(-this.mc.ingameGUI.getChatGUI().getLineCount() + 1);
            } else {
                this.inputField.textboxKeyTyped(typedChar, keyCode);
            }
        } else {
            String s = this.inputField.getText().trim();

            if (s.length() > 0) {
                this.sendChatMessage(s);
            }

            this.mc.displayGuiScreen((GuiScreen) null);
        }
    }

    /**
     * Handles mouse input.
     */
    public void handleMouseInput() throws IOException {
        super.handleMouseInput();
        int i = Mouse.getEventDWheel();

        if (i != 0) {
            if (i > 1) {
                i = 1;
            }

            if (i < -1) {
                i = -1;
            }

            if (!isShiftKeyDown()) {
                i *= 7;
            }

            this.mc.ingameGUI.getChatGUI().scroll(i);
        }
    }

    /**
     * Called when the mouse is clicked. Args : mouseX, mouseY, clickedButton
     */
    protected void mouseClicked(int mouseX, int mouseY, int mouseButton) throws IOException {
        if (mouseButton == 0) {
            IChatComponent ichatcomponent = this.mc.ingameGUI.getChatGUI().getChatComponent(Mouse.getX(), Mouse.getY());

            if (this.handleComponentClick(ichatcomponent)) {
                return;
            }
        }

        this.inputField.mouseClicked(mouseX, mouseY, mouseButton);
        super.mouseClicked(mouseX, mouseY, mouseButton);
    }

    /**
     * Sets the text of the chat
     */
    protected void setText(String newChatText, boolean shouldOverwrite) {
        if (shouldOverwrite) {
            this.inputField.setText(newChatText);
        } else {
            this.inputField.writeText(newChatText);
        }
    }

    public void autocompletePlayerNames() {
        if (this.playerNamesFound) {
            this.inputField
                    .deleteFromCursor(this.inputField.func_146197_a(-1, this.inputField.getCursorPosition(), false)
                            - this.inputField.getCursorPosition());

            if (this.autocompleteIndex >= this.foundPlayerNames.size()) {
                this.autocompleteIndex = 0;
            }
        } else {
            int i = this.inputField.func_146197_a(-1, this.inputField.getCursorPosition(), false);
            this.foundPlayerNames.clear();
            this.autocompleteIndex = 0;
            String s = this.inputField.getText().substring(i).toLowerCase();
            String s1 = this.inputField.getText().substring(0, this.inputField.getCursorPosition());
            this.sendAutocompleteRequest(s1, s);

            if (this.foundPlayerNames.isEmpty()) {
                return;
            }

            this.playerNamesFound = true;
            this.inputField.deleteFromCursor(i - this.inputField.getCursorPosition());
        }

        if (this.foundPlayerNames.size() > 1) {
            StringBuilder stringbuilder = new StringBuilder();

            for (String s2 : this.foundPlayerNames) {
                if (stringbuilder.length() > 0) {
                    stringbuilder.append(", ");
                }

                stringbuilder.append(s2);
            }

            this.mc.ingameGUI.getChatGUI()
                    .printChatMessageWithOptionalDeletion(new ChatComponentText(stringbuilder.toString()), 1);
        }

        this.inputField.writeText((String) this.foundPlayerNames.get(this.autocompleteIndex++));
    }

    @Override
    protected void actionPerformed(GuiButton button) throws IOException {
        if (button.id == 0) {
            uft8mode = !uft8mode;
            this.buttonList.clear();
            initButtons();
            updateScreen();
            return;
        }
        if (button.id == 1) {
            keyTyped('❤', '❤');
            return;
        }
        if (button.id == 2) {
            char[] c = "(っ◔◡◔)っ ♥".toCharArray();
            for (char cc : c) {
                keyTyped(cc, cc);
            }
        }
    }

    private void sendAutocompleteRequest(String cmd, String p_146405_2_) {
        if (cmd.length() >= 1) {
            BlockPos blockpos = null;

            if (this.mc.objectMouseOver != null
                    && this.mc.objectMouseOver.typeOfHit == MovingObjectPosition.MovingObjectType.BLOCK) {
                blockpos = this.mc.objectMouseOver.getBlockPos();
            }

            this.mc.thePlayer.sendQueue.addToSendQueue(new C14PacketTabComplete(cmd, blockpos));
            this.waitingOnAutocomplete = true;
        }
    }

    /**
     * input is relative and is applied directly to the sentHistoryCursor so -1 is
     * the previous message, 1 is the next message from the current cursor position
     */
    public void getSentHistory(int msgPos) {
        int i = this.sentHistoryCursor + msgPos;
        int j = this.mc.ingameGUI.getChatGUI().getSentMessages().size();
        i = MathHelper.clamp_int(i, 0, j);

        if (i != this.sentHistoryCursor) {
            if (i == j) {
                this.sentHistoryCursor = j;
                this.inputField.setText(this.historyBuffer);
            } else {
                if (this.sentHistoryCursor == j) {
                    this.historyBuffer = this.inputField.getText();
                }

                this.inputField.setText((String) this.mc.ingameGUI.getChatGUI().getSentMessages().get(i));
                this.sentHistoryCursor = i;
            }
        }
    }

    /**
     * Draws the screen and all the components in it. Args : mouseX, mouseY,
     * renderPartialTicks
     */
    public void drawScreen(int mouseX, int mouseY, float partialTicks) {
        drawRect(2, this.height - 14, this.width - 92, this.height - 2, Integer.MIN_VALUE);
        this.inputField.drawTextBox();
        IChatComponent ichatcomponent = this.mc.ingameGUI.getChatGUI().getChatComponent(Mouse.getX(), Mouse.getY());
        String text = (inputField.getText().length() > 100 ? "§c" : "§f") + inputField.getText().length() + "/100";

        drawString(fontRendererObj, text, width - 2 - fontRendererObj.getStringWidth(text), height - 25, -1);

        if (ichatcomponent != null && ichatcomponent.getChatStyle().getChatHoverEvent() != null) {
            this.handleComponentHover(ichatcomponent, mouseX, mouseY);
        }

        super.drawScreen(mouseX, mouseY, partialTicks);
    }

    public void onAutocompleteResponse(String[] p_146406_1_) {
        if (this.waitingOnAutocomplete) {
            this.playerNamesFound = false;
            this.foundPlayerNames.clear();

            for (String s : p_146406_1_) {
                if (s.length() > 0) {
                    this.foundPlayerNames.add(s);
                }
            }

            String s1 = this.inputField.getText()
                    .substring(this.inputField.func_146197_a(-1, this.inputField.getCursorPosition(), false));
            String s2 = StringUtils.getCommonPrefix(p_146406_1_);

            if (s2.length() > 0 && !s1.equalsIgnoreCase(s2)) {
                this.inputField
                        .deleteFromCursor(this.inputField.func_146197_a(-1, this.inputField.getCursorPosition(), false)
                                - this.inputField.getCursorPosition());
                this.inputField.writeText(s2);
            } else if (this.foundPlayerNames.size() > 0) {
                this.playerNamesFound = true;
                this.autocompletePlayerNames();
            }
        }
    }

    /**
     * Returns true if this GUI should pause the game when it is displayed in
     * single-player
     */
    public boolean doesGuiPauseGame() {
        return false;
    }
}