path: root/src/main/java/kr/syeyoung/dungeonsguide/gui/elements/MTextField.java

package kr.syeyoung.dungeonsguide.gui.elements;

import kr.syeyoung.dungeonsguide.gui.MPanel;
import kr.syeyoung.dungeonsguide.utils.RenderUtils;
import lombok.Getter;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.FontRenderer;
import net.minecraft.client.gui.Gui;
import net.minecraft.client.gui.ScaledResolution;
import org.lwjgl.input.Keyboard;

import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.event.KeyEvent;
import java.io.IOException;

@Getter
public class MTextField extends MPanel {
    private final Color foreground = Color.white;

    private String text = "asdasdasd";
    private int cursorBlickTicker = 0;

    private int selectionStart = 0;
    private int selectionEnd = 0;

    private int cursor = 0;

    private int xOffset = 0;
    
    public void edit(String str) {
        
    }
    
    public void setText(String text) {
        this.text = text;
    }
    private void setText0(String text) {
        this.text = text;
        edit(text);
    }


    @Override
    public void render(int absMousex, int absMousey, int relMousex0, int relMousey0, float partialTicks, Rectangle clip) {
        Gui.drawRect(0,0,getBounds().width, getBounds().height, isFocused ? Color.white.getRGB() : Color.gray.getRGB());
        Gui.drawRect(1,1,getBounds().width - 1, getBounds().height - 1, Color.black.getRGB());

        Minecraft mc = Minecraft.getMinecraft();
        clip(new ScaledResolution(mc), clip.x + 1, clip.y + 1, clip.width - 2, clip.height - 2);
        FontRenderer fr = mc.fontRendererObj;
        int y = (getBounds().height - fr.FONT_HEIGHT) / 2;
        fr.drawString(text, 3 - xOffset, y, foreground.getRGB());
        // draw selection
        if (isFocused) {
            if (selectionStart != -1) {
                int startX = fr.getStringWidth(text.substring(0, selectionStart)) - xOffset;
                int endX = fr.getStringWidth(text.substring(0, selectionEnd)) - xOffset;
                Gui.drawRect(3 + startX, y, 3 + endX, y + fr.FONT_HEIGHT, 0xFF00FF00);
                fr.drawString(text.substring(selectionStart, selectionEnd), 3 + startX, y, foreground.getRGB());
            }

            // draw cursor
            if (cursor != -1) {
                if (cursor > text.length()) cursor = text.length();
                int x = fr.getStringWidth(text.substring(0, cursor)) - xOffset;
                cursorBlickTicker++;
                if (cursorBlickTicker < 10)
                    Gui.drawRect(3 + x, y, 4 + x, y + fr.FONT_HEIGHT, 0xFFFFFFFF);
                if (cursorBlickTicker == 20) cursorBlickTicker = 0;
            }
        }
    }

    @Override
    public void mouseClicked(int absMouseX, int absMouseY, int relMouseX, int relMouseY, int mouseButton) {
        Rectangle actualField = new Rectangle(1, 3,getBounds().width - 2, getBounds().height - 6);
        if (!actualField.contains(relMouseX, relMouseY)) return;
        if (!lastAbsClip.contains(absMouseX, absMouseY)) return;




        int relStartT = relMouseX-3;
        int offseted = relStartT + xOffset;

        selectionStart = -1;


        FontRenderer fr = Minecraft.getMinecraft().fontRendererObj;

        for (int i = 0; i < text.length(); i++) {
            int totalWidth = fr.getStringWidth(text.substring(0, i));
            if (offseted < totalWidth) {
                cursor = i;
                return;
            }
        }
        cursor = text.length();
    }

    @Override
    public void mouseClickMove(int absMouseX, int absMouseY, int relMouseX, int relMouseY, int clickedMouseButton, long timeSinceLastClick) {
        if (!isFocused) return;
        selectionStart = cursor;
        selectionEnd = cursor;

        int relStartT = relMouseX-3;
        int offseted = relStartT + xOffset;

        FontRenderer fr = Minecraft.getMinecraft().fontRendererObj;

        for (int i = 0; i < text.length(); i++) {
            int totalWidth = fr.getStringWidth(text.substring(0, i));
            if (offseted < totalWidth) {
                if (i < cursor) {
                    selectionStart = i;
                    selectionEnd = cursor;
                } else {
                    selectionStart = cursor;
                    selectionEnd = i;
                }
                return;
            }
        }
        selectionEnd = text.length();
        if (selectionStart == selectionEnd) {
            selectionStart = -1;
        }
    }

    @Override
    public void mouseScrolled(int absMouseX, int absMouseY, int relMouseX0, int relMouseY0, int scrollAmount) {
        if (!isFocused) return;
        if (scrollAmount > 0) {
            xOffset += 5;
        } else if (scrollAmount < 0){
            xOffset -= 5;
        }
        if (xOffset < 0) {
            xOffset = 0;
        }
        int width = Minecraft.getMinecraft().fontRendererObj.getStringWidth(text);
        int overflow = getBounds().width - 3 - width;
        if (overflow >= 0) {
            xOffset = 0;
        } else if (width - xOffset + 10 < getBounds().width) {
            xOffset = width - getBounds().width+10;
        }
    }

    @Override
    public void keyTyped(char typedChar, int keycode) {
        if (!isFocused) return;


        if (selectionStart == -1) {
            if (keycode == 199) { // home
                cursor = 0;
                return;
            }

            if (keycode == 207) { // end
                cursor = text.length();
                return;
            }

            if (keycode == 203) { // left
                cursor--;
                if (cursor < 0) cursor = 0;
                return;
            }

            if (keycode == 205) { // right
                cursor ++;
                if (cursor > text.length()) cursor = text.length();
                return;
            }

            // backspace
            if (keycode == 14 && cursor > 0) {
                setText0(this.text.substring(0, cursor - 1) + this.text.substring(cursor));
                cursor--;
                return;
            }

            //del
            if (keycode == 211 && cursor < text.length()) {
                setText0(this.text.substring(0, cursor) + this.text.substring(cursor+1));
                return;
            }

            // paste
            boolean shouldPaste = false;
            if (keycode == 47) {
                if (Minecraft.isRunningOnMac) {  // mac
                    if (Keyboard.isKeyDown(219) || Keyboard.isKeyDown(220)) {
                        shouldPaste = true;
                    }
                } else { // literally everything else
                    if (Keyboard.isKeyDown(29) || Keyboard.isKeyDown(157)) {
                        shouldPaste = true;
                    }
                }
            }
            if (shouldPaste) {
                Transferable transferable = Toolkit.getDefaultToolkit().getSystemClipboard().getContents(null);
                if (transferable != null && transferable.isDataFlavorSupported(DataFlavor.stringFlavor)) {
                    try {
                        Object theText = transferable.getTransferData(DataFlavor.stringFlavor);
                        setText0(
                                this.text.substring(0, this.cursor)
                                        + theText
                                        + this.text.substring(this.cursor));

                        cursor += theText.toString().length();
                    } catch (UnsupportedFlavorException e) {
                        e.printStackTrace();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                return;
            }

            // text
            if (isPrintableChar(typedChar)) {
                setText0(
                        this.text.substring(0, this.cursor)
                                + typedChar
                                + this.text.substring(this.cursor));
                this.cursor++;
                return;
            }
        } else {
            if (keycode == 199) { // home
                cursor = 0;
                selectionStart = -1;
                return;
            }

            if (keycode == 207) { // end
                selectionStart = -1;
                cursor = text.length();
                return;
            }

            if (keycode == 203) { // left
                cursor = selectionStart;
                selectionStart = -1;
                return;
            }

            if (keycode == 205) { // right
                cursor = selectionEnd;
                selectionStart = -1;
                return;
            }

            // backspace
            if (keycode == 14 && cursor > 0) {
                setText0(this.text.substring(0, selectionStart) + this.text.substring(selectionEnd));
                cursor = selectionStart;
                selectionStart = -1;
                return;
            }

            //del
            if (keycode == 211 && cursor < text.length()) {
                setText0(this.text.substring(0, selectionStart) + this.text.substring(selectionEnd));
                cursor = selectionStart;
                selectionStart = -1;
                return;
            }

            // paste
            boolean shouldPaste = false;
            if (keycode == 47) {
                if (Minecraft.isRunningOnMac) {  // mac
                    if (Keyboard.isKeyDown(219) || Keyboard.isKeyDown(220)) {
                        shouldPaste = true;
                    }
                } else { // literally everything else
                    if (Keyboard.isKeyDown(29) || Keyboard.isKeyDown(157)) {
                        shouldPaste = true;
                    }
                }
            }
            if (shouldPaste) {
                Transferable transferable = Toolkit.getDefaultToolkit().getSystemClipboard().getContents(null);
                if (transferable != null && transferable.isDataFlavorSupported(DataFlavor.stringFlavor)) {
                    try {
                        Object theText = transferable.getTransferData(DataFlavor.stringFlavor);
                        setText0(
                                this.text.substring(0, this.selectionStart)
                                        + theText
                                        + this.text.substring(this.selectionEnd));
                        cursor = this.selectionStart + theText.toString().length();
                    } catch (UnsupportedFlavorException e) {
                        e.printStackTrace();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    selectionStart = -1;
                }
                return;
            }
            boolean shouldCopy = false;
            if (keycode == 46) {
                if (Minecraft.isRunningOnMac) {  // mac
                    if (Keyboard.isKeyDown(219) || Keyboard.isKeyDown(220)) {
                        shouldCopy = true;
                    }
                } else { // literally everything else
                    if (Keyboard.isKeyDown(29) || Keyboard.isKeyDown(157)) {
                        shouldCopy = true;
                    }
                }
            }
            if (shouldCopy) {
                StringSelection selection = new StringSelection(text.substring(selectionStart, selectionEnd));
                Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
                clipboard.setContents(selection, selection);
                return;
            }

            // text
            if (isPrintableChar(typedChar)) {
                setText0(
                        this.text.substring(0, this.selectionStart)
                                + typedChar
                                + this.text.substring(this.selectionEnd));
                this.cursor = this.selectionStart + 1;
                selectionStart = -1;
                return;
            }
        }
    }
    public boolean isPrintableChar( char c ) {
        Character.UnicodeBlock block = Character.UnicodeBlock.of( c );
        return (!Character.isISOControl(c)) &&
                c != KeyEvent.CHAR_UNDEFINED &&
                block != null &&
                block != Character.UnicodeBlock.SPECIALS;
    }

}