Press n or j to go to the next uncovered block, b, p or k for the previous block.
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2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 | 4x 8x 8x 8x 8x 8x 1536x 8x 8x 2048x 800x 800x 64x 64x 8x 8x 64x 8x 8x 8x 8x 8x 3x 3x 36x 36x 36x 36x 36x 36x 36x 36x 36x 36x 8x 96x 96x 96x 96x 96x 96x 96x 96x 96x 96x 8x 8x 8x 8x 8x 3x 3x 8x 2x 8x 8x 8x 8x 8x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 3x 1x 4x 4x 4x 3x 1x 4x 4x 1x 4x 1x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 4x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 3x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 3x 3x 3x 4x 4x 4x 4x 4x 4x 4x 2x 2x 2x 2x 2x 2x 2x 2x 2x 4x 4x 4x 1x 4x 4x 4x 4x 4x 4x 4x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 2x 2x 2x 2x 10x 10x 50x 10x 10x 50x 50x 50x 50x 50x 50x 9x 2x 2x 2x 2x 10x 10x 50x 10x 10x 50x 50x 50x 50x 50x 50x 9x 9x 9x 9x 9x 9x 3x 3x 3x 3x 3x 3x 3x 3x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 9x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 9x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 9x 9x | import State from './state.js';
import Toolbar from './toolbar.js';
import { $, createCanvas } from './ui.js';
import magicNumbers from './magicNumbers.js';
const createFKeys = () => {
// Stolen "savagely" from Moebius, who stole it "mercilessly" from PabloDraw, thanks Curtis! lol
const predefinedSets = [
[218, 191, 192, 217, 196, 179, 195, 180, 193, 194, 32, 32],
[201, 187, 200, 188, 205, 186, 204, 185, 202, 203, 32, 32],
[213, 184, 212, 190, 205, 179, 198, 181, 207, 209, 32, 32],
[214, 183, 211, 189, 196, 186, 199, 182, 208, 210, 32, 32],
[197, 206, 216, 215, 232, 232, 155, 156, 153, 239, 32, 32],
[176, 177, 178, 219, 223, 220, 221, 222, 254, 250, 7, 32],
[1, 2, 3, 4, 5, 6, 240, 14, 15, 32, 32, 32],
[24, 25, 30, 31, 16, 17, 18, 29, 20, 21, 32, 32],
[174, 175, 242, 243, 169, 170, 253, 246, 171, 172, 32, 32],
[227, 241, 244, 245, 234, 157, 228, 248, 251, 252, 32, 32],
[224, 225, 226, 229, 230, 231, 235, 236, 237, 238, 32, 32],
[128, 135, 165, 164, 152, 159, 247, 249, 173, 168, 32, 32],
[131, 132, 133, 160, 166, 134, 142, 143, 145, 146, 32, 32],
[136, 137, 138, 130, 144, 140, 139, 141, 161, 158, 32, 32],
[147, 148, 149, 162, 167, 150, 129, 151, 163, 154, 32, 32],
[47, 92, 40, 41, 123, 125, 91, 93, 96, 39, 32, 32],
];
// Generate additional sets to cover all 256 characters
const generateCharSets = () => {
const charSets = [...predefinedSets];
const usedChars = new Set();
predefinedSets.forEach(set => {
set.forEach(char => usedChars.add(char));
});
// Generate sets for remaining characters
let currentSet = [];
for (let i = 0; i < 256; i++) {
if (!usedChars.has(i)) {
currentSet.push(i);
if (currentSet.length === 12) {
charSets.push([...currentSet]);
currentSet = [];
}
}
}
// Add any remaining characters as a final set
Eif (currentSet.length > 0) {
while (currentSet.length < 12) {
currentSet.push(32); // Pad with spaces
}
charSets.push(currentSet);
}
return charSets;
};
const fkeySets = generateCharSets();
let currentSetIndex = 5; // Default to set 5 (blocks, half-blocks, etc.)
// Update all fkey canvases with current set
const updateFKeyDisplays = () => {
const currentSet = fkeySets[currentSetIndex];
for (let i = 0; i < 12; i++) {
const canvas = $('fkey' + i);
Eif (canvas) {
// Set canvas internal dimensions
canvas.width = State.font.getWidth();
canvas.height = State.font.getHeight();
// Keep CSS display size fixed at 1.5x of BASE font size
// This maintains the original UI appearance regardless of zoom
const baseWidth = State.fontWidth;
const baseHeight = State.fontHeight;
const fixedScale = 1.5;
canvas.style.width = baseWidth * fixedScale + 'px';
canvas.style.height = baseHeight * fixedScale + 'px';
State.font.draw(
currentSet[i],
State.palette.getForegroundColor(),
State.palette.getBackgroundColor(),
canvas.getContext('2d'),
0,
0,
);
}
}
};
// Initialize fkey canvases
for (let i = 0; i < 12; i++) {
const canvas = $('fkey' + i);
const wrap = $('fkey' + i + 'w');
Eif (canvas && wrap) {
const insert = () => {
State.textArtCanvas.startUndo();
State.textArtCanvas.draw(callback => {
callback(
fkeySets[currentSetIndex][i],
State.palette.getForegroundColor(),
State.palette.getBackgroundColor(),
State.cursor.getX(),
State.cursor.getY(),
);
}, false);
State.cursor.right();
};
wrap.addEventListener('click', insert);
}
}
// Set up navigation
const prevButton = $('fkeySetPrev');
const nextButton = $('fkeySetNext');
const previousCharacterSet = () => {
currentSetIndex =
currentSetIndex <= 0 ? fkeySets.length - 1 : currentSetIndex - 1;
updateFKeyDisplays();
};
const nextCharacterSet = () => {
currentSetIndex =
currentSetIndex >= fkeySets.length - 1 ? 0 : currentSetIndex + 1;
updateFKeyDisplays();
};
if (prevButton) {
prevButton.addEventListener('click', previousCharacterSet);
}
Eif (nextButton) {
nextButton.addEventListener('click', nextCharacterSet);
}
const keyDown = e => {
// Handle F1-F12 function keys
const fKeyMatch = e.code.match(/^F(\d+)$/);
if (
!e.altKey &&
!e.ctrlKey &&
!e.metaKey &&
fKeyMatch &&
fKeyMatch[1] >= 1 &&
fKeyMatch[1] <= 12
) {
e.preventDefault();
State.textArtCanvas.startUndo();
State.textArtCanvas.draw(callback => {
callback(
fkeySets[currentSetIndex][fKeyMatch[1] - 1],
State.palette.getForegroundColor(),
State.palette.getBackgroundColor(),
State.cursor.getX(),
State.cursor.getY(),
);
}, false);
State.cursor.right();
}
// 'Ctrl+[' - previous character set
else if (e.ctrlKey && !e.altKey && !e.metaKey && e.code === 'BracketLeft') {
e.preventDefault();
previousCharacterSet();
}
// 'Ctrl+]' - next character set
else if (
e.ctrlKey &&
!e.altKey &&
!e.metaKey &&
e.code === 'BracketRight'
) {
e.preventDefault();
nextCharacterSet();
}
};
const enable = () => {
document.addEventListener('keydown', keyDown);
updateFKeyDisplays();
};
const disable = () => {
document.removeEventListener('keydown', keyDown);
};
// Update displays when palette/font changes
document.addEventListener('onPaletteChange', updateFKeyDisplays);
document.addEventListener('onForegroundChange', updateFKeyDisplays);
document.addEventListener('onBackgroundChange', updateFKeyDisplays);
document.addEventListener('onFontChange', updateFKeyDisplays);
return {
enable: enable,
disable: disable,
};
};
const calculateRowsPerScreen = (viewport, fontHeight) => {
if (!viewport) {
return 0;
}
return Math.floor(viewport.clientHeight / fontHeight);
};
const createCursor = canvasContainer => {
const canvas = createCanvas(State.font.getWidth(), State.font.getHeight());
const viewport = $('viewport');
Iif (!viewport) {
console.error('viewport element missing, focus scroll disabled');
}
let x = 0;
let y = 0;
let visible = false;
const show = () => {
canvas.style.display = 'block';
visible = true;
};
const hide = () => {
canvas.style.display = 'none';
visible = false;
};
const startSelection = () => {
State.selectionCursor.setStart(x, y);
hide();
};
const endSelection = () => {
State.selectionCursor.hide();
show();
};
const move = (newX, newY) => {
Iif (State.selectionCursor.isVisible()) {
endSelection();
}
x = Math.min(Math.max(newX, 0), State.textArtCanvas.getColumns() - 1);
y = Math.min(Math.max(newY, 0), State.textArtCanvas.getRows() - 1);
const canvasWidth = State.font.getWidth();
canvas.style.left = x * canvasWidth - 1 + 'px';
canvas.style.top = y * State.font.getHeight() - 1 + 'px';
State.positionInfo.update(x, y);
State.pasteTool.setSelection(x, y, 1, 1);
// Auto-scroll viewport to keep cursor visible
scrollViewportToCursor();
};
const scrollViewportToCursor = () => {
Iif (!viewport) {
return;
}
const fontHeight = State.font.getHeight();
const fontWidth = State.font.getWidth();
const bufferRows = 5; // Number of rows as buffer
const cursorPixelY = y * fontHeight;
const cursorPixelX = x * fontWidth;
const bufferPixels = bufferRows * fontHeight;
const viewportHeight = viewport.clientHeight;
const viewportWidth = viewport.clientWidth;
const scrollTop = viewport.scrollTop;
const scrollLeft = viewport.scrollLeft;
// Check vertical scrolling
const cursorTop = cursorPixelY - bufferPixels;
const cursorBottom = cursorPixelY + fontHeight + bufferPixels;
if (cursorTop < scrollTop) {
// Cursor is above viewport, scroll up
viewport.scrollTop = Math.max(0, cursorTop);
} else Iif (cursorBottom > scrollTop + viewportHeight) {
// Cursor is below viewport, scroll down
viewport.scrollTop = Math.max(0, cursorBottom - viewportHeight);
}
// Check horizontal scrolling
const cursorLeft = cursorPixelX - bufferRows * fontWidth;
const cursorRight = cursorPixelX + fontWidth + bufferRows * fontWidth;
if (cursorLeft < scrollLeft) {
// Cursor is left of viewport, scroll left
viewport.scrollLeft = Math.max(0, cursorLeft);
} else Iif (cursorRight > scrollLeft + viewportWidth) {
// Cursor is right of viewport, scroll right
viewport.scrollLeft = Math.max(0, cursorRight - viewportWidth);
}
};
const updateDimensions = () => {
canvas.width = State.font.getWidth() + 1;
canvas.height = State.font.getHeight() + 1;
move(x, y);
};
const getX = () => {
return x;
};
const getY = () => {
return y;
};
const left = () => {
move(x - 1, y);
};
const right = () => {
move(x + 1, y);
};
const up = () => {
move(x, y - 1);
};
const down = () => {
move(x, y + 1);
};
const newLine = () => {
move(0, y + 1);
};
const startOfCurrentRow = () => {
move(0, y);
};
const endOfCurrentRow = () => {
move(State.textArtCanvas.getColumns() - 1, y);
};
const pageUp = () => {
const rowsPerScreen = calculateRowsPerScreen(
viewport,
State.font.getHeight(),
);
const newY = Math.max(0, y - rowsPerScreen);
move(x, newY);
};
const pageDown = () => {
const rowsPerScreen = calculateRowsPerScreen(
viewport,
State.font.getHeight(),
);
const maxY = State.textArtCanvas.getRows() - 1;
const newY = Math.min(maxY, y + rowsPerScreen);
move(x, newY);
};
const keyDown = e => {
if (!e.ctrlKey && !e.altKey) {
if (!e.shiftKey && !e.metaKey) {
switch (e.code) {
case 'Enter': // Enter key
e.preventDefault();
newLine();
break;
case 'End':
e.preventDefault();
endOfCurrentRow();
break;
case 'Home':
e.preventDefault();
startOfCurrentRow();
break;
case 'PageUp':
e.preventDefault();
pageUp();
break;
case 'PageDown':
e.preventDefault();
pageDown();
break;
case 'ArrowLeft':
e.preventDefault();
left();
break;
case 'ArrowUp':
e.preventDefault();
up();
break;
case 'ArrowRight':
e.preventDefault();
right();
break;
case 'ArrowDown':
e.preventDefault();
down();
break;
default:
break;
}
} else if (e.metaKey && !e.shiftKey) {
switch (e.code) {
// Cmd/Meta + Left arrow
case 'ArrowLeft':
e.preventDefault();
startOfCurrentRow();
break;
// Cmd/Meta + Right arrow
case 'ArrowRight':
e.preventDefault();
endOfCurrentRow();
break;
default:
break;
}
} else if (e.shiftKey && !e.metaKey) {
// Shift + arrow keys trigger selection - switch to selection tool
switch (e.code) {
case 'ArrowLeft':
case 'ArrowUp':
case 'ArrowRight':
case 'ArrowDown':
e.preventDefault();
// Set pending action so selection tool can apply it immediately
State.selectionTool.setPendingAction(e.code);
State.cursor.startSelection();
Toolbar.switchTool('selection');
break;
default:
break;
}
}
}
};
const enable = () => {
document.addEventListener('keydown', keyDown);
show();
State.pasteTool.setSelection(x, y, 1, 1);
};
const disable = () => {
document.removeEventListener('keydown', keyDown);
hide();
State.pasteTool.disable();
};
const isVisible = () => {
return visible;
};
// init
canvas.classList.add('cursor');
hide();
canvasContainer.insertBefore(canvas, canvasContainer.firstChild);
document.addEventListener('onLetterSpacingChange', updateDimensions);
document.addEventListener('onTextCanvasSizeChange', updateDimensions);
document.addEventListener('onFontChange', updateDimensions);
document.addEventListener('onOpenedFile', updateDimensions);
document.addEventListener('onScaleFactorChange', updateDimensions);
move(x, y);
return {
show: show,
hide: hide,
move: move,
getX: getX,
getY: getY,
left: left,
right: right,
up: up,
down: down,
newLine: newLine,
startOfCurrentRow: startOfCurrentRow,
endOfCurrentRow: endOfCurrentRow,
enable: enable,
disable: disable,
isVisible: isVisible,
startSelection: startSelection,
};
};
const createSelectionCursor = element => {
const cursor = createCanvas(0, 0);
let sx, sy, dx, dy, x, y, width, height;
let visible = false;
// Marching ants animation state
let dashOffset = 0;
let animationId = null;
const dashPattern = [4, 4]; // dash, gap length
const dashSpeed = 0.1; // px per frame
x = y = 0;
const processCoords = () => {
x = Math.min(sx, dx);
y = Math.min(sy, dy);
x = Math.max(x, 0);
y = Math.max(y, 0);
const columns = State.textArtCanvas.getColumns();
const rows = State.textArtCanvas.getRows();
width = Math.abs(dx - sx) + 1;
height = Math.abs(dy - sy) + 1;
width = Math.min(width, columns - x);
height = Math.min(height, rows - y);
};
const drawBorder = () => {
const ctx = cursor.getContext('2d');
ctx.clearRect(0, 0, cursor.width, cursor.height);
const antsColor = cursor.classList.contains('moveMode')
? '#ff7518'
: '#fff';
ctx.save();
ctx.strokeStyle = antsColor;
ctx.lineWidth = 1;
ctx.setLineDash(dashPattern);
ctx.lineDashOffset = -dashOffset;
ctx.strokeRect(1, 1, cursor.width - 2, cursor.height - 2);
ctx.restore();
};
const animateBorder = () => {
dashOffset = (dashOffset + dashSpeed) % (dashPattern[0] + dashPattern[1]);
drawBorder();
animationId = requestAnimationFrame(animateBorder);
};
const show = () => {
cursor.style.display = 'block';
if (!animationId) {
animateBorder();
}
};
const hide = () => {
cursor.style.display = 'none';
visible = false;
State.pasteTool.disable();
if (animationId) {
cancelAnimationFrame(animationId);
animationId = null;
}
};
const updateCursor = () => {
const fontWidth = State.font.getWidth();
const fontHeight = State.font.getHeight();
cursor.style.left = x * fontWidth - 1 + 'px';
cursor.style.top = y * fontHeight - 1 + 'px';
cursor.width = width * fontWidth + 1;
cursor.height = height * fontHeight + 1;
drawBorder();
};
const setStart = (startX, startY) => {
sx = startX;
sy = startY;
processCoords();
x = startX;
y = startY;
width = 1;
height = 1;
updateCursor();
State.pasteTool.setSelection(x, y, width, height);
};
const setEnd = (endX, endY) => {
show();
dx = endX;
dy = endY;
processCoords();
updateCursor();
State.pasteTool.setSelection(x, y, width, height);
visible = true;
State.positionInfo.update(x, y);
};
const isVisible = () => visible;
const getSelection = () => {
if (visible) {
return { x, y, width, height };
}
return null;
};
const getPos = () => {
return { x, y };
};
cursor.classList.add('selectionCursor');
cursor.style.display = 'none';
element.appendChild(cursor);
return {
show,
hide,
setStart,
setEnd,
isVisible,
getPos,
getSelection,
getElement: () => cursor,
};
};
const createKeyboardController = () => {
const fkeys = createFKeys();
let enabled = false;
let ignored = false;
const draw = charCode => {
State.textArtCanvas.startUndo();
State.textArtCanvas.draw(callback => {
callback(
charCode,
State.palette.getForegroundColor(),
State.palette.getBackgroundColor(),
State.cursor.getX(),
State.cursor.getY(),
);
}, false);
State.cursor.right();
};
const deleteText = () => {
State.textArtCanvas.startUndo();
State.textArtCanvas.draw(callback => {
callback(
magicNumbers.CHAR_NULL,
magicNumbers.COLOR_WHITE,
magicNumbers.COLOR_BLACK,
State.cursor.getX() - 1,
State.cursor.getY(),
);
}, false);
State.cursor.left();
};
// Edit actions for insert, delete, and erase operations
const insertRow = () => {
const currentRows = State.textArtCanvas.getRows();
const currentColumns = State.textArtCanvas.getColumns();
const cursorY = State.cursor.getY();
State.textArtCanvas.startUndo();
const newImageData = new Uint16Array(currentColumns * (currentRows + 1));
const oldImageData = State.textArtCanvas.getImageData();
for (let y = 0; y < cursorY; y++) {
for (let x = 0; x < currentColumns; x++) {
newImageData[y * currentColumns + x] =
oldImageData[y * currentColumns + x];
}
}
for (let x = 0; x < currentColumns; x++) {
newImageData[cursorY * currentColumns + x] = magicNumbers.BLANK_CELL;
}
for (let y = cursorY; y < currentRows; y++) {
for (let x = 0; x < currentColumns; x++) {
newImageData[(y + 1) * currentColumns + x] =
oldImageData[y * currentColumns + x];
}
}
State.textArtCanvas.setImageData(
currentColumns,
currentRows + 1,
newImageData,
State.textArtCanvas.getIceColors(),
);
};
const deleteRow = () => {
const currentRows = State.textArtCanvas.getRows();
const currentColumns = State.textArtCanvas.getColumns();
const cursorY = State.cursor.getY();
if (currentRows <= 1) {
return;
} // Don't delete if only one row
State.textArtCanvas.startUndo();
const newImageData = new Uint16Array(currentColumns * (currentRows - 1));
const oldImageData = State.textArtCanvas.getImageData();
for (let y = 0; y < cursorY; y++) {
for (let x = 0; x < currentColumns; x++) {
newImageData[y * currentColumns + x] =
oldImageData[y * currentColumns + x];
}
}
// Skip the row at cursor position (delete it)
// Copy rows after cursor position
for (let y = cursorY + 1; y < currentRows; y++) {
for (let x = 0; x < currentColumns; x++) {
newImageData[(y - 1) * currentColumns + x] =
oldImageData[y * currentColumns + x];
}
}
State.textArtCanvas.setImageData(
currentColumns,
currentRows - 1,
newImageData,
State.textArtCanvas.getIceColors(),
);
if (State.cursor.getY() >= currentRows - 1) {
State.cursor.move(State.cursor.getX(), currentRows - 2);
}
};
const insertColumn = () => {
const currentRows = State.textArtCanvas.getRows();
const currentColumns = State.textArtCanvas.getColumns();
const cursorX = State.cursor.getX();
State.textArtCanvas.startUndo();
const newImageData = new Uint16Array((currentColumns + 1) * currentRows);
const oldImageData = State.textArtCanvas.getImageData();
for (let y = 0; y < currentRows; y++) {
for (let x = 0; x < cursorX; x++) {
newImageData[y * (currentColumns + 1) + x] =
oldImageData[y * currentColumns + x];
}
newImageData[y * (currentColumns + 1) + cursorX] =
magicNumbers.BLANK_CELL;
for (let x = cursorX; x < currentColumns; x++) {
newImageData[y * (currentColumns + 1) + x + 1] =
oldImageData[y * currentColumns + x];
}
}
State.textArtCanvas.setImageData(
currentColumns + 1,
currentRows,
newImageData,
State.textArtCanvas.getIceColors(),
);
};
const deleteColumn = () => {
const currentRows = State.textArtCanvas.getRows();
const currentColumns = State.textArtCanvas.getColumns();
const cursorX = State.cursor.getX();
if (currentColumns <= 1) {
return;
} // Don't delete if only one column
State.textArtCanvas.startUndo();
const newImageData = new Uint16Array((currentColumns - 1) * currentRows);
const oldImageData = State.textArtCanvas.getImageData();
for (let y = 0; y < currentRows; y++) {
for (let x = 0; x < cursorX; x++) {
newImageData[y * (currentColumns - 1) + x] =
oldImageData[y * currentColumns + x];
}
// Skip the column at cursor position (delete it)
for (let x = cursorX + 1; x < currentColumns; x++) {
newImageData[y * (currentColumns - 1) + x - 1] =
oldImageData[y * currentColumns + x];
}
}
State.textArtCanvas.setImageData(
currentColumns - 1,
currentRows,
newImageData,
State.textArtCanvas.getIceColors(),
);
if (State.cursor.getX() >= currentColumns - 1) {
State.cursor.move(currentColumns - 2, State.cursor.getY());
}
};
const eraseRow = () => {
const currentColumns = State.textArtCanvas.getColumns();
const cursorY = State.cursor.getY();
State.textArtCanvas.startUndo();
for (let x = 0; x < currentColumns; x++) {
State.textArtCanvas.draw(callback => {
callback(
magicNumbers.CHAR_SPACE,
magicNumbers.COLOR_WHITE,
magicNumbers.COLOR_BLACK,
x,
cursorY,
);
}, false);
}
};
const eraseToStartOfRow = () => {
const cursorX = State.cursor.getX();
const cursorY = State.cursor.getY();
State.textArtCanvas.startUndo();
for (let x = 0; x <= cursorX; x++) {
State.textArtCanvas.draw(callback => {
callback(
magicNumbers.CHAR_SPACE,
magicNumbers.COLOR_WHITE,
magicNumbers.COLOR_BLACK,
x,
cursorY,
);
}, false);
}
};
const eraseToEndOfRow = () => {
const currentColumns = State.textArtCanvas.getColumns();
const cursorX = State.cursor.getX();
const cursorY = State.cursor.getY();
State.textArtCanvas.startUndo();
for (let x = cursorX; x < currentColumns; x++) {
State.textArtCanvas.draw(callback => {
callback(
magicNumbers.CHAR_SPACE,
magicNumbers.COLOR_WHITE,
magicNumbers.COLOR_BLACK,
x,
cursorY,
);
}, false);
}
};
const eraseColumn = () => {
const currentRows = State.textArtCanvas.getRows();
const cursorX = State.cursor.getX();
State.textArtCanvas.startUndo();
for (let y = 0; y < currentRows; y++) {
State.textArtCanvas.draw(callback => {
callback(
magicNumbers.CHAR_SPACE,
magicNumbers.COLOR_WHITE,
magicNumbers.COLOR_BLACK,
cursorX,
y,
);
}, false);
}
};
const eraseToStartOfColumn = () => {
const cursorX = State.cursor.getX();
const cursorY = State.cursor.getY();
State.textArtCanvas.startUndo();
for (let y = 0; y <= cursorY; y++) {
State.textArtCanvas.draw(callback => {
callback(
magicNumbers.CHAR_SPACE,
magicNumbers.COLOR_WHITE,
magicNumbers.COLOR_BLACK,
cursorX,
y,
);
}, false);
}
};
const eraseToEndOfColumn = () => {
const currentRows = State.textArtCanvas.getRows();
const cursorX = State.cursor.getX();
const cursorY = State.cursor.getY();
State.textArtCanvas.startUndo();
for (let y = cursorY; y < currentRows; y++) {
State.textArtCanvas.draw(callback => {
callback(
magicNumbers.CHAR_SPACE,
magicNumbers.COLOR_WHITE,
magicNumbers.COLOR_BLACK,
cursorX,
y,
);
}, false);
}
};
const keyDown = e => {
if (!ignored) {
if (!e.altKey && !e.ctrlKey && !e.metaKey) {
// Tab key - insert tab character
if (e.code === 'Tab') {
e.preventDefault();
draw(9); // Tab character code
} else if (e.code === 'Backspace') {
e.preventDefault();
if (State.cursor.getX() > 0) {
deleteText();
}
}
} else if (e.altKey && !e.ctrlKey && !e.metaKey) {
switch (e.code) {
// Alt+Up Arrow - Insert Row
case 'ArrowUp':
e.preventDefault();
insertRow();
break;
// Alt+Down Arrow - Delete Row
case 'ArrowDown':
e.preventDefault();
deleteRow();
break;
// Alt+Right Arrow - Insert Column
case 'ArrowRight':
e.preventDefault();
insertColumn();
break;
// Alt+Left Arrow - Delete Column
case 'ArrowLeft':
e.preventDefault();
deleteColumn();
break;
// Alt+E - Erase Row (or Alt+Shift+E for Erase Column)
case 'KeyE':
e.preventDefault();
if (e.shiftKey) {
eraseColumn();
} else {
eraseRow();
}
break;
// Alt+Home - Erase to Start of Row
case 'Home':
e.preventDefault();
eraseToStartOfRow();
break;
// Alt+End - Erase to End of Row
case 'End':
e.preventDefault();
eraseToEndOfRow();
break;
// Alt+Page Up - Erase to Start of Column
case 'PageUp':
e.preventDefault();
eraseToStartOfColumn();
break;
// Alt+Page Down - Erase to End of Column
case 'PageDown':
e.preventDefault();
eraseToEndOfColumn();
break;
}
}
}
};
const unicodeMapping = new Map([
[0x2302, 127], // HOUSE (โ)
[0x00c7, 128], // CAPITAL LETTER C WITH CEDILLA (ร)
[0x00fc, 129], // SMALL LETTER U WITH DIAERESIS (รผ)
[0x00e9, 130], // SMALL LETTER E WITH ACUTE (รฉ)
[0x00e2, 131], // SMALL LETTER A WITH CIRCUMFLEX (รข)
[0x00e4, 132], // SMALL LETTER A WITH DIAERESIS (รค)
[0x00e0, 133], // SMALL LETTER A WITH GRAVE (ร )
[0x00e5, 134], // SMALL LETTER A WITH RING ABOVE (รฅ)
[0x00e7, 135], // SMALL LETTER C WITH CEDILLA (รง)
[0x00ea, 136], // SMALL LETTER E WITH CIRCUMFLEX (รช)
[0x00eb, 137], // SMALL LETTER E WITH DIAERESIS (รซ)
[0x00e8, 138], // SMALL LETTER E WITH GRAVE (รจ)
[0x00ef, 139], // SMALL LETTER I WITH DIAERESIS (รฏ)
[0x00ee, 140], // SMALL LETTER I WITH CIRCUMFLEX (รฎ)
[0x00ec, 141], // SMALL LETTER I WITH GRAVE (รฌ)
[0x00c4, 142], // CAPITAL LETTER A WITH DIAERESIS (ร)
[0x00c5, 143], // CAPITAL LETTER A WITH RING ABOVE (ร
)
[0x00c9, 144], // CAPITAL LETTER E WITH ACUTE (ร)
[0x00e6, 145], // SMALL LETTER AE (รฆ)
[0x00c6, 146], // CAPITAL LETTER AE (ร)
[0x00f4, 147], // SMALL LETTER O WITH CIRCUMFLEX (รด)
[0x00f6, 148], // SMALL LETTER O WITH DIAERESIS (รถ)
[0x00f2, 149], // SMALL LETTER O WITH GRAVE (รฒ)
[0x00fb, 150], // SMALL LETTER U WITH CIRCUMFLEX (รป)
[0x00f9, 151], // SMALL LETTER U WITH GRAVE (รน)
[0x00ff, 152], // SMALL LETTER Y WITH DIAERESIS (รฟ)
[0x00d6, 153], // CAPITAL LETTER O WITH DIAERESIS (ร)
[0x00dc, 154], // CAPITAL LETTER U WITH DIAERESIS (ร)
[0x00a2, 155], // CENT SIGN (ยข)
[0x00a3, 156], // POUND SIGN (ยฃ)
[0x00a5, 157], // YEN SIGN (ยฅ)
[0x20a7, 158], // PESETA SIGN (โง)
[0x0192, 159], // SMALL LETTER F WITH HOOK (ฦ)
[0x00e1, 160], // SMALL LETTER A WITH ACUTE (รก)
[0x00ed, 161], // SMALL LETTER I WITH ACUTE (รญ)
[0x00f3, 162], // SMALL LETTER O WITH ACUTE (รณ)
[0x00fa, 163], // SMALL LETTER U WITH ACUTE (รบ)
[0x00f1, 164], // SMALL LETTER N WITH TILDE (รฑ)
[0x00d1, 165], // CAPITAL LETTER N WITH TILDE (ร)
[0x00aa, 166], // FEMININE ORDINAL INDICATOR (ยช)
[0x00ba, 167], // MASCULINE ORDINAL INDICATOR (ยบ)
[0x00bf, 168], // INVERTED QUESTION MARK (ยฟ)
[0x2310, 169], // REVERSED NOT SIGN (โ)
[0x00ac, 170], // NOT SIGN (ยฌ)
[0x00bd, 171], // VULGAR FRACTION ONE HALF (ยฝ)
[0x00bc, 172], // VULGAR FRACTION ONE QUARTER (ยผ)
[0x00a1, 173], // INVERTED EXCLAMATION MARK (ยก)
[0x00ab, 174], // LEFT-POINTING DOUBLE ANGLE QUOTATION MARK (ยซ)
[0x00bb, 175], // RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK (ยป)
[0x2591, 176], // LIGHT SHADE (โ)
[0x2592, 177], // MEDIUM SHADE (โ)
[0x2593, 178], // DARK SHADE (โ)
[0x2502, 179], // BOX DRAWINGS LIGHT VERTICAL (โ)
[0x2524, 180], // BOX DRAWINGS LIGHT VERTICAL AND LEFT (โค)
[0x2561, 181], // BOX DRAWINGS VERTICAL SINGLE AND LEFT DOUBLE (โก)
[0x2562, 182], // BOX DRAWINGS VERTICAL DOUBLE AND LEFT SINGLE (โข)
[0x2556, 183], // BOX DRAWINGS DOWN DOUBLE AND LEFT SINGLE (โ)
[0x2555, 184], // BOX DRAWINGS DOWN SINGLE AND LEFT DOUBLE (โ)
[0x2563, 185], // BOX DRAWINGS DOUBLE VERTICAL AND LEFT (โฃ)
[0x2551, 186], // BOX DRAWINGS DOUBLE VERTICAL (โ)
[0x2557, 187], // BOX DRAWINGS DOUBLE DOWN AND LEFT (โ)
[0x255d, 188], // BOX DRAWINGS DOUBLE UP AND LEFT (โ)
[0x255c, 189], // BOX DRAWINGS UP DOUBLE AND LEFT SINGLE (โ)
[0x255b, 190], // BOX DRAWINGS UP SINGLE AND LEFT DOUBLE (โ)
[0x2510, 191], // BOX DRAWINGS LIGHT DOWN AND LEFT (โ)
[0x2514, 192], // BOX DRAWINGS LIGHT UP AND RIGHT (โ)
[0x2534, 193], // BOX DRAWINGS LIGHT UP AND HORIZONTAL (โด)
[0x252c, 194], // BOX DRAWINGS LIGHT DOWN AND HORIZONTAL (โฌ)
[0x251c, 195], // BOX DRAWINGS LIGHT VERTICAL AND RIGHT (โ)
[0x2500, 196], // BOX DRAWINGS LIGHT HORIZONTAL (โ)
[0x253c, 197], // BOX DRAWINGS LIGHT VERTICAL AND HORIZONTAL (โผ)
[0x255e, 198], // BOX DRAWINGS VERTICAL SINGLE AND RIGHT DOUBLE (โ)
[0x255f, 199], // BOX DRAWINGS VERTICAL DOUBLE AND RIGHT SINGLE (โ)
[0x255a, 200], // BOX DRAWINGS DOUBLE UP AND RIGHT (โ)
[0x2554, 201], // BOX DRAWINGS DOUBLE DOWN AND RIGHT (โ)
[0x2569, 202], // BOX DRAWINGS DOUBLE UP AND HORIZONTAL (โฉ)
[0x2566, 203], // BOX DRAWINGS DOUBLE DOWN AND HORIZONTAL (โฆ)
[0x2560, 204], // BOX DRAWINGS DOUBLE VERTICAL AND RIGHT (โ )
[0x2550, 205], // BOX DRAWINGS DOUBLE HORIZONTAL (โ)
[0x256c, 206], // BOX DRAWINGS DOUBLE VERTICAL AND HORIZONTAL (โฌ)
[0x2567, 207], // BOX DRAWINGS UP SINGLE AND HORIZONTAL DOUBLE (โง)
[0x2568, 208], // BOX DRAWINGS UP DOUBLE AND HORIZONTAL SINGLE (โจ)
[0x2564, 209], // BOX DRAWINGS DOWN SINGLE AND HORIZONTAL DOUBLE (โค)
[0x2565, 210], // BOX DRAWINGS DOWN DOUBLE AND HORIZONTAL SINGLE (โฅ)
[0x2559, 211], // BOX DRAWINGS UP DOUBLE AND RIGHT SINGLE (โ)
[0x2558, 212], // BOX DRAWINGS UP SINGLE AND RIGHT DOUBLE (โ)
[0x2552, 213], // BOX DRAWINGS DOWN SINGLE AND RIGHT DOUBLE (โ)
[0x2553, 214], // BOX DRAWINGS DOWN DOUBLE AND RIGHT SINGLE (โ)
[0x256b, 215], // BOX DRAWINGS VERTICAL DOUBLE AND HORIZONTAL SINGLE (โซ)
[0x256a, 216], // BOX DRAWINGS VERTICAL SINGLE AND HORIZONTAL DOUBLE (โช)
[0x2518, 217], // BOX DRAWINGS LIGHT UP AND LEFT (โ)
[0x250c, 218], // BOX DRAWINGS LIGHT DOWN AND RIGHT (โ)
[0x2588, 219], // FULL BLOCK (โ)
[0x2584, 220], // LOWER HALF BLOCK (โ)
[0x258c, 221], // LEFT HALF BLOCK (โ)
[0x2590, 222], // RIGHT HALF BLOCK (โ)
[0x2580, 223], // UPPER HALF BLOCK (โ)
[0x03b1, 224], // GREEK SMALL LETTER ALPHA (ฮฑ)
[0x00df, 225], // SMALL LETTER SHARP S (ร)
[0x0393, 226], // GREEK CAPITAL LETTER GAMMA (ฮ)
[0x03c0, 227], // GREEK SMALL LETTER PI (ฯ)
[0x03a3, 228], // GREEK CAPITAL LETTER SIGMA (ฮฃ)
[0x03c3, 229], // GREEK SMALL LETTER SIGMA (ฯ)
[0x00b5, 230], // MICRO SIGN (ยต)
[0x03c4, 231], // GREEK SMALL LETTER TAU (ฯ)
[0x03a6, 232], // GREEK CAPITAL LETTER PHI (ฮฆ)
[0x0398, 233], // GREEK CAPITAL LETTER THETA (ฮ)
[0x03a9, 234], // GREEK CAPITAL LETTER OMEGA (ฮฉ)
[0x03b4, 235], // GREEK SMALL LETTER DELTA (ฮด)
[0x221e, 236], // INFINITY (โ)
[0x03c6, 237], // GREEK SMALL LETTER PHI (ฯ)
[0x03b5, 238], // GREEK SMALL LETTER EPSILON (ฮต)
[0x2229, 239], // INTERSECTION (โฉ)
[0x2261, 240], // IDENTICAL TO (โก)
[0x00b1, 241], // PLUS-MINUS SIGN (ยฑ)
[0x2265, 242], // GREATER-THAN OR EQUAL TO (โฅ)
[0x2264, 243], // LESS-THAN OR EQUAL TO (โค)
[0x2320, 244], // TOP HALF INTEGRAL (โ )
[0x2321, 245], // BOTTOM HALF INTEGRAL (โก)
[0x00f7, 246], // DIVISION SIGN (รท)
[0x2248, 247], // ALMOST EQUAL TO (โ)
[0x00b0, 248], // DEGREE SIGN (ยฐ)
[0x2219, 249], // BULLET OPERATOR (โ)
[0x00b7, 250], // MIDDLE DOT (ยท)
[0x221a, 251], // SQUARE ROOT (โ)
[0x207f, 252], // SUPERSCRIPT SMALL LETTER N (โฟ)
[0x00b2, 253], // SUPERSCRIPT TWO (ยฒ)
[0x25a0, 254], // BLACK SQUARE (โ )
[0x00a0, 255], // NO-BREAK SPACE ( )
]);
/**
* Converts a Unicode code point to the corresponding code in the custom code page.
* If the code point exists in the unicodeMapping Map, returns the mapped value.
* Otherwise, returns the original code point.
*
* @param {number} keyCode - The Unicode code point to convert.
* @returns {number} The mapped code page value or the original code point.
*/
const convertUnicode = keyCode => unicodeMapping.get(keyCode) ?? keyCode;
const keyPress = e => {
if (!ignored) {
if (!e.altKey && !e.ctrlKey && !e.metaKey) {
// Check for printable characters
if (e.key.length === 1) {
// Single character keys (printable characters)
e.preventDefault();
draw(convertUnicode(e.key.charCodeAt(0)));
} else if (e.key === 'Enter') {
// Enter key - cursor to new line
e.preventDefault();
State.cursor.newLine();
} else if (e.key === 'Backspace') {
// Backspace key - delete text
e.preventDefault();
if (State.cursor.getX() > 0) {
deleteText();
}
}
// Special case for section sign
if (e.key === 'ยง') {
e.preventDefault();
draw(21);
}
} else if (e.ctrlKey) {
// Handle Ctrl key combinations
if (e.key === 'u' || e.key === 'U') {
// Ctrl+U - Pick up colors from current position
e.preventDefault();
const block = State.textArtCanvas.getBlock(
State.cursor.getX(),
State.cursor.getY(),
);
State.palette.setForegroundColor(block.foregroundColor);
State.palette.setBackgroundColor(block.backgroundColor);
}
}
}
};
let selectionStartX = 0;
let selectionStartY = 0;
const textCanvasDown = e => {
State.cursor.move(e.detail.x, e.detail.y);
// Store start position but don't create selection yet
selectionStartX = e.detail.x;
selectionStartY = e.detail.y;
};
const textCanvasDrag = e => {
// Only switch to selection if we've dragged to a different cell
if (e.detail.x !== selectionStartX || e.detail.y !== selectionStartY) {
State.cursor.hide();
Toolbar.switchTool('selection');
State.selectionCursor.setStart(selectionStartX, selectionStartY);
State.selectionCursor.setEnd(e.detail.x, e.detail.y);
}
};
const enable = () => {
document.addEventListener('keydown', keyDown);
document.addEventListener('keypress', keyPress);
document.addEventListener('onTextCanvasDown', textCanvasDown);
document.addEventListener('onTextCanvasDrag', textCanvasDrag);
State.cursor.enable();
fkeys.enable();
State.positionInfo.update(State.cursor.getX(), State.cursor.getY());
// Check if there's an active selection and inherit its position
const selection = State.selectionCursor.getPos();
Iif (selection) {
State.cursor.move(selection.x, selection.y);
}
enabled = true;
};
const disable = () => {
document.removeEventListener('keydown', keyDown);
document.removeEventListener('keypress', keyPress);
document.removeEventListener('onTextCanvasDown', textCanvasDown);
document.removeEventListener('onTextCanvasDrag', textCanvasDrag);
const selection = State.selectionCursor.getPos();
Iif (selection) {
State.cursor.move(selection.x, selection.y);
}
State.selectionCursor.hide();
State.cursor.disable();
fkeys.disable();
enabled = false;
};
const ignore = () => {
ignored = true;
if (enabled) {
State.cursor.disable();
fkeys.disable();
}
};
const unignore = () => {
ignored = false;
if (enabled) {
State.cursor.enable();
fkeys.enable();
}
};
return {
enable: enable,
disable: disable,
ignore: ignore,
unignore: unignore,
insertRow: insertRow,
deleteRow: deleteRow,
insertColumn: insertColumn,
deleteColumn: deleteColumn,
eraseRow: eraseRow,
eraseToStartOfRow: eraseToStartOfRow,
eraseToEndOfRow: eraseToEndOfRow,
eraseColumn: eraseColumn,
eraseToStartOfColumn: eraseToStartOfColumn,
eraseToEndOfColumn: eraseToEndOfColumn,
};
};
const createPasteTool = (cutItem, copyItem, pasteItem, deleteItem) => {
let buffer;
let x = 0;
let y = 0;
let width = 0;
let height = 0;
let enabled = false;
const setSelection = (newX, newY, newWidth, newHeight) => {
x = newX;
y = newY;
width = newWidth;
height = newHeight;
Iif (buffer !== undefined) {
pasteItem.classList.remove('disabled');
}
cutItem.classList.remove('disabled');
copyItem.classList.remove('disabled');
deleteItem.classList.remove('disabled');
enabled = true;
};
const disable = () => {
pasteItem.classList.add('disabled');
cutItem.classList.add('disabled');
copyItem.classList.add('disabled');
deleteItem.classList.add('disabled');
enabled = false;
};
const copy = () => {
buffer = State.textArtCanvas.getArea(x, y, width, height);
pasteItem.classList.remove('disabled');
};
const deleteSelection = () => {
Iif (State.selectionCursor.isVisible() || State.cursor.isVisible()) {
State.textArtCanvas.startUndo();
State.textArtCanvas.deleteArea(
x,
y,
width,
height,
State.palette.getBackgroundColor(),
);
}
};
const cut = () => {
if (State.selectionCursor.isVisible() || State.cursor.isVisible()) {
copy();
deleteSelection();
}
};
const paste = () => {
if (
buffer !== undefined &&
(State.selectionCursor.isVisible() || State.cursor.isVisible())
) {
State.textArtCanvas.startUndo();
State.textArtCanvas.setArea(buffer, x, y);
}
};
const systemPaste = () => {
if (!navigator.clipboard || !navigator.clipboard.readText) {
console.warn('[Keyboard] Clipboard API not available');
return;
}
navigator.clipboard
.readText()
.then(text => {
if (
text &&
(State.selectionCursor.isVisible() || State.cursor.isVisible())
) {
const columns = State.textArtCanvas.getColumns();
const rows = State.textArtCanvas.getRows();
// Check for oversized content
const lines = text.split(/\r\n|\r|\n/);
// Check single line width
if (
lines.length === 1 &&
lines[0].length > columns * magicNumbers.MAX_COPY_LINES
) {
alert(
`Paste buffer too large. Single line content exceeds ${columns * magicNumbers.MAX_COPY_LINES} characters. Please copy smaller blocks.`,
);
return;
}
// Check multi-line height
if (lines.length > rows * magicNumbers.MAX_COPY_LINES) {
alert(
`Paste buffer too large. Content exceeds ${rows * magicNumbers.MAX_COPY_LINES} lines. Please copy smaller blocks.`,
);
return;
}
State.textArtCanvas.startUndo();
let currentX = x;
let currentY = y;
const startX = x; // Remember starting column for line breaks
const foreground = State.palette.getForegroundColor();
const background = State.palette.getBackgroundColor();
State.textArtCanvas.draw(draw => {
for (let i = 0; i < text.length; i++) {
const char = text.charAt(i);
// Handle newline characters
if (char === '\n' || char === '\r') {
currentY++;
currentX = startX;
// Skip \r\n combination
if (
char === '\r' &&
i + 1 < text.length &&
text.charAt(i + 1) === '\n'
) {
i++;
}
continue;
}
// Check bounds - stop if we're beyond canvas vertically
if (currentY >= rows) {
break;
}
// Handle edge truncation - skip characters that exceed the right edge
if (currentX >= columns) {
// Skip this character and continue until we hit a newline
continue;
}
// Handle non-printable characters
let charCode = char.charCodeAt(0);
// Convert tabs and other whitespace/non-printable characters to space
if (char === '\t' || charCode < 32 || charCode === 127) {
charCode = magicNumbers.CHAR_SPACE;
}
// Draw the character
draw(charCode, foreground, background, currentX, currentY);
currentX++;
}
}, false);
}
})
.catch(err => {
console.error('[Keyboard] Failed to read clipboard:', err);
});
};
const keyDown = e => {
if (enabled) {
if ((e.ctrlKey || e.metaKey) && !e.altKey && !e.shiftKey) {
switch (e.code) {
case 'KeyX': // Ctrl/Cmd+X - Cut
e.preventDefault();
cut();
break;
case 'KeyC': // Ctrl/Cmd+C - Copy
e.preventDefault();
copy();
break;
case 'KeyV': // Ctrl/Cmd+V - Paste
e.preventDefault();
paste();
break;
default:
break;
}
}
// System paste with Ctrl+Shift+V
if (
(e.ctrlKey || e.metaKey) &&
e.shiftKey &&
!e.altKey &&
e.code === 'KeyV'
) {
e.preventDefault();
systemPaste();
}
}
if ((e.ctrlKey || e.metaKey) && e.code === 'Backspace') {
// Ctrl/Cmd+Backspace - Delete selection
e.preventDefault();
deleteSelection();
}
};
document.addEventListener('keydown', keyDown);
return {
setSelection: setSelection,
cut: cut,
copy: copy,
paste: paste,
systemPaste: systemPaste,
deleteSelection: deleteSelection,
disable: disable,
};
};
const createSelectionTool = () => {
const viewport = $('viewport');
const panel = $('selectionToolbar');
const flipHButton = $('flipHorizontal');
const flipVButton = $('flipVertical');
const moveButton = $('moveBlocks');
let moveMode = false;
let selectionData = null;
let isDragging = false;
let dragStartX = 0;
let dragStartY = 0;
let originalPosition = null; // Original position when move mode started
let underlyingData = null; // Content currently underneath the moving blocks
// Selection expansion state
let selectionStartX = 0;
let selectionStartY = 0;
let selectionEndX = 0;
let selectionEndY = 0;
// Pending initial action when switching from keyboard mode
let pendingInitialAction = null;
const canvasDown = e => {
if (moveMode) {
const selection = State.selectionCursor.getSelection();
if (
selection &&
e.detail.x >= selection.x &&
e.detail.x < selection.x + selection.width &&
e.detail.y >= selection.y &&
e.detail.y < selection.y + selection.height
) {
isDragging = true;
dragStartX = e.detail.x;
dragStartY = e.detail.y;
}
} else {
State.selectionCursor.setStart(e.detail.x, e.detail.y);
State.selectionCursor.setEnd(e.detail.x, e.detail.y);
}
};
const canvasDrag = e => {
if (moveMode && isDragging) {
const deltaX = e.detail.x - dragStartX;
const deltaY = e.detail.y - dragStartY;
moveSelection(deltaX, deltaY);
dragStartX = e.detail.x;
dragStartY = e.detail.y;
} else if (!moveMode) {
State.selectionCursor.setEnd(e.detail.x, e.detail.y);
}
};
const canvasUp = _ => {
if (moveMode && isDragging) {
isDragging = false;
} else {
// Sync selection expansion state after mouse selection
const selection = State.selectionCursor.getSelection();
if (selection) {
selectionStartX = selection.x;
selectionStartY = selection.y;
selectionEndX = selection.x + selection.width - 1;
selectionEndY = selection.y + selection.height - 1;
}
}
};
const flipHorizontal = () => {
const selection = State.selectionCursor.getSelection();
Iif (!selection) {
return;
}
State.textArtCanvas.startUndo();
// Get all blocks in the selection
for (let y = 0; y < selection.height; y++) {
const blocks = [];
for (let x = 0; x < selection.width; x++) {
blocks.push(
State.textArtCanvas.getBlock(selection.x + x, selection.y + y),
);
}
// Flip the row horizontally
State.textArtCanvas.draw(callback => {
for (let x = 0; x < selection.width; x++) {
const sourceBlock = blocks[x];
const targetX = selection.x + (selection.width - 1 - x);
let charCode = sourceBlock.charCode;
// Transform left/right half blocks
switch (charCode) {
case 221: // LEFT_HALF_BLOCK
charCode = 222; // RIGHT_HALF_BLOCK
break;
case 222: // RIGHT_HALF_BLOCK
charCode = 221; // LEFT_HALF_BLOCK
break;
default:
break;
}
callback(
charCode,
sourceBlock.foregroundColor,
sourceBlock.backgroundColor,
targetX,
selection.y + y,
);
}
}, false);
}
};
const flipVertical = () => {
const selection = State.selectionCursor.getSelection();
Iif (!selection) {
return;
}
State.textArtCanvas.startUndo();
// Get all blocks in the selection
for (let x = 0; x < selection.width; x++) {
const blocks = [];
for (let y = 0; y < selection.height; y++) {
blocks.push(
State.textArtCanvas.getBlock(selection.x + x, selection.y + y),
);
}
// Flip the column vertically
State.textArtCanvas.draw(callback => {
for (let y = 0; y < selection.height; y++) {
const sourceBlock = blocks[y];
const targetY = selection.y + (selection.height - 1 - y);
let charCode = sourceBlock.charCode;
// Transform upper/lower half blocks
switch (charCode) {
case 223: // UPPER_HALF_BLOCK
charCode = 220; // LOWER_HALF_BLOCK
break;
case 220: // LOWER_HALF_BLOCK
charCode = 223; // UPPER_HALF_BLOCK
break;
default:
break;
}
callback(
charCode,
sourceBlock.foregroundColor,
sourceBlock.backgroundColor,
selection.x + x,
targetY,
);
}
}, false);
}
};
const setAreaSelective = (area, targetArea, x, y) => {
const columns = State.textArtCanvas.getColumns();
const rows = State.textArtCanvas.getRows();
const maxWidth = Math.min(area.width, columns - x);
const maxHeight = Math.min(area.height, rows - y);
State.textArtCanvas.draw(draw => {
for (let py = 0; py < maxHeight; py++) {
for (let px = 0; px < maxWidth; px++) {
const srcIndex = py * area.width + px;
const sourceAttrib = area.data[srcIndex] || 0;
if (sourceAttrib !== 0) {
const charCode = sourceAttrib >> 8;
const fg = sourceAttrib & 15;
const bg = (sourceAttrib >> 4) & 15;
draw(charCode, fg, bg, x + px, y + py);
} else if (
targetArea &&
px < targetArea.width &&
py < targetArea.height
) {
const tgtIndex = py * targetArea.width + px;
const targetAttrib = targetArea.data[tgtIndex] || 0;
const charCode = targetAttrib >> 8;
const fg = targetAttrib & 15;
const bg = (targetAttrib >> 4) & 15;
draw(charCode, fg, bg, x + px, y + py);
}
// else: leave existing canvas pixel alone
}
}
}, false); // batch the whole operation for consistent commit/undo
};
const moveSelection = (deltaX, deltaY) => {
const selection = State.selectionCursor.getSelection();
if (!selection) {
return;
}
const newX = Math.max(
0,
Math.min(
selection.x + deltaX,
State.textArtCanvas.getColumns() - selection.width,
),
);
const newY = Math.max(
0,
Math.min(
selection.y + deltaY,
State.textArtCanvas.getRows() - selection.height,
),
);
// Don't process if we haven't actually moved
if (newX === selection.x && newY === selection.y) {
return;
}
State.textArtCanvas.startUndo();
// Only update the current selection data if we don't have it
if (!selectionData) {
selectionData = State.textArtCanvas.getArea(
selection.x,
selection.y,
selection.width,
selection.height,
);
}
// Restore what was underneath the current position (if any)
if (underlyingData) {
State.textArtCanvas.setArea(underlyingData, selection.x, selection.y);
}
// Store what's underneath the new position
underlyingData = State.textArtCanvas.getArea(
newX,
newY,
selection.width,
selection.height,
);
// Apply the selection at the new position, but only non-blank characters
setAreaSelective(selectionData, underlyingData, newX, newY);
// Update the selection cursor to the new position
State.selectionCursor.setStart(newX, newY);
State.selectionCursor.setEnd(
newX + selection.width - 1,
newY + selection.height - 1,
);
};
const createEmptyArea = (width, height) => {
// Create an area filled with empty/blank characters (char code 0, colors 0)
const data = new Uint16Array(width * height);
for (let i = 0; i < data.length; i++) {
data[i] = 0; // char code 0, foreground 0, background 0
}
return {
data: data,
width: width,
height: height,
};
};
const toggleMoveMode = () => {
moveMode = !moveMode;
if (moveMode) {
// Enable move mode
moveButton.classList.add('enabled');
State.selectionCursor.getElement().classList.add('moveMode');
// Store selection data and original position when entering move mode
const selection = State.selectionCursor.getSelection();
if (selection) {
selectionData = State.textArtCanvas.getArea(
selection.x,
selection.y,
selection.width,
selection.height,
);
originalPosition = {
x: selection.x,
y: selection.y,
width: selection.width,
height: selection.height,
};
// For a move operation, the old position should be cleared (empty)
// We'll restore empty space as we move away
underlyingData = createEmptyArea(selection.width, selection.height);
}
} else {
// Disable move mode - finalize the move by clearing original position if different
const currentSelection = State.selectionCursor.getSelection();
if (
originalPosition &&
currentSelection &&
(currentSelection.x !== originalPosition.x ||
currentSelection.y !== originalPosition.y)
) {
// Check if the original and current positions overlap
const xOverlap =
originalPosition.x < currentSelection.x + currentSelection.width &&
originalPosition.x + originalPosition.width > currentSelection.x;
const yOverlap =
originalPosition.y < currentSelection.y + currentSelection.height &&
originalPosition.y + originalPosition.height > currentSelection.y;
const hasOverlap = xOverlap && yOverlap;
State.textArtCanvas.startUndo();
if (hasOverlap) {
// If there's overlap, selectively clear only the non-overlapping parts
const emptyData = createEmptyArea(
originalPosition.width,
originalPosition.height,
);
// Get what's currently at the original position (which includes part of the moved selection)
const currentAtOriginal = State.textArtCanvas.getArea(
originalPosition.x,
originalPosition.y,
originalPosition.width,
originalPosition.height,
);
// Apply empty data, but preserve anything from the current selection
setAreaSelective(
emptyData,
currentAtOriginal,
originalPosition.x,
originalPosition.y,
);
} else {
// No overlap
State.textArtCanvas.deleteArea(
originalPosition.x,
originalPosition.y,
originalPosition.width,
originalPosition.height,
State.palette.getBackgroundColor(),
);
}
}
moveButton.classList.remove('enabled');
State.selectionCursor.getElement().classList.remove('moveMode');
selectionData = null;
originalPosition = null;
underlyingData = null;
}
};
const isMoveMode = () => moveMode;
// Selection expansion methods - delegated from cursor
const startSelectionExpansion = () => {
Eif (!State.selectionCursor.isVisible()) {
// Start selection from current cursor position
selectionStartX = State.cursor.getX();
selectionStartY = State.cursor.getY();
selectionEndX = selectionStartX;
selectionEndY = selectionStartY;
State.selectionCursor.setStart(selectionStartX, selectionStartY);
State.selectionCursor.setEnd(selectionEndX, selectionEndY);
State.cursor.hide();
}
// If selection already exists, keep using the current anchor (selectionStartX/Y)
// and end (selectionEndX/Y) coordinates. Don't reinitialize from bounds.
};
const moveSelectionLeft = () => {
const selection = State.selectionCursor.getSelection();
if (!selection) {
return;
}
const newX = Math.max(0, selection.x - 1);
const newY = selection.y;
selectionStartX = newX;
selectionStartY = newY;
selectionEndX = newX + selection.width - 1;
selectionEndY = newY + selection.height - 1;
State.selectionCursor.setStart(selectionStartX, selectionStartY);
State.selectionCursor.setEnd(selectionEndX, selectionEndY);
scrollViewportToSelection();
};
const moveSelectionRight = () => {
const selection = State.selectionCursor.getSelection();
if (!selection) {
return;
}
const newX = Math.min(
State.textArtCanvas.getColumns() - selection.width,
selection.x + 1,
);
const newY = selection.y;
selectionStartX = newX;
selectionStartY = newY;
selectionEndX = newX + selection.width - 1;
selectionEndY = newY + selection.height - 1;
State.selectionCursor.setStart(selectionStartX, selectionStartY);
State.selectionCursor.setEnd(selectionEndX, selectionEndY);
scrollViewportToSelection();
};
const moveSelectionUp = () => {
const selection = State.selectionCursor.getSelection();
if (!selection) {
return;
}
const newX = selection.x;
const newY = Math.max(0, selection.y - 1);
selectionStartX = newX;
selectionStartY = newY;
selectionEndX = newX + selection.width - 1;
selectionEndY = newY + selection.height - 1;
State.selectionCursor.setStart(selectionStartX, selectionStartY);
State.selectionCursor.setEnd(selectionEndX, selectionEndY);
scrollViewportToSelection();
};
const moveSelectionDown = () => {
const selection = State.selectionCursor.getSelection();
if (!selection) {
return;
}
const newX = selection.x;
const newY = Math.min(
State.textArtCanvas.getRows() - selection.height,
selection.y + 1,
);
selectionStartX = newX;
selectionStartY = newY;
selectionEndX = newX + selection.width - 1;
selectionEndY = newY + selection.height - 1;
State.selectionCursor.setStart(selectionStartX, selectionStartY);
State.selectionCursor.setEnd(selectionEndX, selectionEndY);
scrollViewportToSelection();
};
const shiftLeft = () => {
startSelectionExpansion();
selectionEndX = Math.max(selectionEndX - 1, 0);
State.selectionCursor.setStart(selectionStartX, selectionStartY);
State.selectionCursor.setEnd(selectionEndX, selectionEndY);
scrollViewportToSelection();
};
const shiftRight = () => {
startSelectionExpansion();
selectionEndX = Math.min(
selectionEndX + 1,
State.textArtCanvas.getColumns() - 1,
);
State.selectionCursor.setStart(selectionStartX, selectionStartY);
State.selectionCursor.setEnd(selectionEndX, selectionEndY);
scrollViewportToSelection();
};
const shiftUp = () => {
startSelectionExpansion();
selectionEndY = Math.max(selectionEndY - 1, 0);
State.selectionCursor.setStart(selectionStartX, selectionStartY);
State.selectionCursor.setEnd(selectionEndX, selectionEndY);
scrollViewportToSelection();
};
const shiftDown = () => {
startSelectionExpansion();
selectionEndY = Math.min(
selectionEndY + 1,
State.textArtCanvas.getRows() - 1,
);
State.selectionCursor.setStart(selectionStartX, selectionStartY);
State.selectionCursor.setEnd(selectionEndX, selectionEndY);
scrollViewportToSelection();
};
const shiftToStartOfRow = () => {
startSelectionExpansion();
selectionEndX = 0;
// Ensure coordinates are ordered (start <= end)
if (selectionStartX > selectionEndX) {
[selectionStartX, selectionEndX] = [selectionEndX, selectionStartX];
}
State.selectionCursor.setStart(selectionStartX, selectionStartY);
State.selectionCursor.setEnd(selectionEndX, selectionEndY);
scrollViewportToSelection();
};
const shiftToEndOfRow = () => {
startSelectionExpansion();
selectionEndX = State.textArtCanvas.getColumns() - 1;
// Ensure coordinates are ordered (start <= end)
if (selectionStartX > selectionEndX) {
[selectionStartX, selectionEndX] = [selectionEndX, selectionStartX];
}
State.selectionCursor.setStart(selectionStartX, selectionStartY);
State.selectionCursor.setEnd(selectionEndX, selectionEndY);
scrollViewportToSelection();
};
const scrollViewportToSelection = () => {
if (!viewport) {
return;
}
const selection = State.selectionCursor.getSelection();
if (!selection) {
return;
}
const fontHeight = State.font.getHeight();
const fontWidth = State.font.getWidth();
const bufferRows = 5; // Same buffer as cursor
// Use the end position of the selection for focus
const selectionPixelY = selection.y * fontHeight;
const selectionPixelX = selection.x * fontWidth;
const bufferPixels = bufferRows * fontHeight;
const viewportHeight = viewport.clientHeight;
const viewportWidth = viewport.clientWidth;
const scrollTop = viewport.scrollTop;
const scrollLeft = viewport.scrollLeft;
// Check vertical scrolling
const selectionTop = selectionPixelY - bufferPixels;
const selectionBottom =
selectionPixelY + selection.height * fontHeight + bufferPixels;
if (selectionTop < scrollTop) {
viewport.scrollTop = Math.max(0, selectionTop);
} else if (selectionBottom > scrollTop + viewportHeight) {
viewport.scrollTop = Math.max(0, selectionBottom - viewportHeight);
}
// Check horizontal scrolling
const selectionLeft = selectionPixelX - bufferRows * fontWidth;
const selectionRight =
selectionPixelX + selection.width * fontWidth + bufferRows * fontWidth;
if (selectionLeft < scrollLeft) {
viewport.scrollLeft = Math.max(0, selectionLeft);
} else if (selectionRight > scrollLeft + viewportWidth) {
viewport.scrollLeft = Math.max(0, selectionRight - viewportWidth);
}
};
const pageScroll = (direction = 'down') => {
if (!viewport) {
return;
}
const rowsPerScreen = calculateRowsPerScreen(
viewport,
State.font.getHeight(),
);
const maxY = State.textArtCanvas.getRows() - 1;
const delta = direction === 'up' ? -rowsPerScreen : rowsPerScreen;
if (moveMode && State.selectionCursor.getSelection()) {
moveSelection(0, delta);
} else {
startSelectionExpansion();
const selection = State.selectionCursor.getSelection();
const selectionHeight = selection ? selection.height : 1;
// Calculate new position
let newStartY = selectionStartY + delta;
let newEndY = selectionEndY + delta;
// Clamp to canvas bounds while preserving selection height
if (newEndY > maxY) {
newEndY = maxY;
newStartY = Math.max(0, maxY - selectionHeight + 1);
} else if (newStartY < 0) {
newStartY = 0;
newEndY = Math.min(maxY, selectionHeight - 1);
}
selectionStartY = newStartY;
selectionEndY = newEndY;
State.selectionCursor.setStart(selectionStartX, selectionStartY);
State.selectionCursor.setEnd(selectionEndX, selectionEndY);
}
scrollViewportToSelection();
};
const keyDown = e => {
// These keys work with or without modifiers
if (e.code === 'Enter') {
// Enter - exit selection and use default cursor behavior
e.preventDefault();
Toolbar.switchTool('keyboard');
State.cursor.newLine();
} else if (e.code === 'End') {
// End key - expand selection to end of current row
e.preventDefault();
shiftToEndOfRow();
} else if (e.code === 'Home') {
// Home key - expand selection to start of current row
e.preventDefault();
shiftToStartOfRow();
}
if (!e.ctrlKey && !e.altKey && !e.shiftKey && !e.metaKey) {
if (e.key === '[') {
// '[' key - flip horizontal
e.preventDefault();
flipHorizontal();
} else if (e.key === ']') {
// ']' key - flip vertical
e.preventDefault();
flipVertical();
} else if (e.key === 'M' || e.key === 'm') {
// 'M' key - toggle move mode
e.preventDefault();
toggleMoveMode();
} else if (e.code === 'PageUp') {
e.preventDefault();
pageScroll('up');
} else if (e.code === 'PageDown') {
e.preventDefault();
pageScroll('down');
} else if (moveMode && State.selectionCursor.getSelection()) {
// Arrow key shift selection contents in move mode
if (e.code === 'ArrowLeft') {
e.preventDefault();
moveSelection(-1, 0);
} else if (e.code === 'ArrowUp') {
e.preventDefault();
moveSelection(0, -1);
} else if (e.code === 'ArrowRight') {
e.preventDefault();
moveSelection(1, 0);
} else if (e.code === 'ArrowDown') {
e.preventDefault();
moveSelection(0, 1);
}
} else {
switch (e.code) {
// arrow keys move selection area
case 'ArrowLeft':
e.preventDefault();
moveSelectionLeft();
break;
case 'ArrowUp':
e.preventDefault();
moveSelectionUp();
break;
case 'ArrowRight':
e.preventDefault();
moveSelectionRight();
break;
case 'ArrowDown':
e.preventDefault();
moveSelectionDown();
break;
default:
break;
}
}
} else if (e.shiftKey && !e.metaKey) {
// Arrows + Shift key combinations expand selection
switch (e.code) {
case 'ArrowLeft':
e.preventDefault();
shiftLeft();
break;
case 'ArrowUp':
e.preventDefault();
shiftUp();
break;
case 'ArrowRight':
e.preventDefault();
shiftRight();
break;
case 'ArrowDown':
e.preventDefault();
shiftDown();
break;
default:
break;
}
}
};
const enable = () => {
State.selectionCursor.show();
panel.style.display = 'flex';
document.addEventListener('onTextCanvasDown', canvasDown);
document.addEventListener('onTextCanvasDrag', canvasDrag);
document.addEventListener('onTextCanvasUp', canvasUp);
document.addEventListener('keydown', keyDown);
flipHButton.addEventListener('click', flipHorizontal);
flipVButton.addEventListener('click', flipVertical);
moveButton.addEventListener('click', toggleMoveMode);
// If there's already a selection visible (switched from keyboard mode),
// initialize our selection expansion state
Iif (State.selectionCursor.isVisible()) {
const selection = State.selectionCursor.getSelection();
if (selection) {
selectionStartX = selection.x;
selectionStartY = selection.y;
selectionEndX = selection.x + selection.width - 1;
selectionEndY = selection.y + selection.height - 1;
}
} else {
startSelectionExpansion();
}
// Execute pending initial action if one was set from keyboard mode
Iif (pendingInitialAction) {
const action = pendingInitialAction;
pendingInitialAction = null; // Clear it immediately
switch (action) {
case 'ArrowLeft':
shiftLeft();
break;
case 'ArrowRight':
shiftRight();
break;
case 'ArrowUp':
shiftUp();
break;
case 'ArrowDown':
shiftDown();
break;
}
}
};
const disable = () => {
State.selectionCursor.hide();
panel.style.display = 'none';
document.removeEventListener('onTextCanvasDown', canvasDown);
document.removeEventListener('onTextCanvasDrag', canvasDrag);
document.removeEventListener('onTextCanvasUp', canvasUp);
document.removeEventListener('keydown', keyDown);
// Reset move mode if it was active and finalize any pending move
Iif (moveMode) {
// Finalize the move by clearing original position if different
const currentSelection = State.selectionCursor.getSelection();
if (
originalPosition &&
currentSelection &&
(currentSelection.x !== originalPosition.x ||
currentSelection.y !== originalPosition.y)
) {
// Check if the original and current positions overlap
const xOverlap =
originalPosition.x < currentSelection.x + currentSelection.width &&
originalPosition.x + originalPosition.width > currentSelection.x;
const yOverlap =
originalPosition.y < currentSelection.y + currentSelection.height &&
originalPosition.y + originalPosition.height > currentSelection.y;
const hasOverlap = xOverlap && yOverlap;
State.textArtCanvas.startUndo();
if (hasOverlap) {
// If there's overlap, we need to selectively clear only the non-overlapping parts
// For now, use setAreaSelective with empty data to preserve the moved selection
const emptyData = createEmptyArea(
originalPosition.width,
originalPosition.height,
);
// Get what's currently at the original position (which includes part of the moved selection)
const currentAtOriginal = State.textArtCanvas.getArea(
originalPosition.x,
originalPosition.y,
originalPosition.width,
originalPosition.height,
);
// Apply empty data, but preserve anything from the current selection
setAreaSelective(
emptyData,
currentAtOriginal,
originalPosition.x,
originalPosition.y,
);
} else {
// No overlap - safe to delete the entire original area
State.textArtCanvas.deleteArea(
originalPosition.x,
originalPosition.y,
originalPosition.width,
originalPosition.height,
State.palette.getBackgroundColor(),
);
}
}
moveMode = false;
moveButton.classList.remove('enabled');
State.selectionCursor.getElement().classList.remove('moveMode');
selectionData = null;
originalPosition = null;
underlyingData = null;
}
flipHButton.removeEventListener('click', flipHorizontal);
flipVButton.removeEventListener('click', flipVertical);
moveButton.removeEventListener('click', toggleMoveMode);
State.pasteTool.disable();
};
// Method to set pending initial action when switching from keyboard mode
const setPendingAction = keyCode => {
pendingInitialAction = keyCode;
};
return {
enable: enable,
disable: disable,
scrollViewportToSelection: scrollViewportToSelection,
flipHorizontal: flipHorizontal,
flipVertical: flipVertical,
setPendingAction: setPendingAction,
toggleMoveMode: toggleMoveMode,
isMoveMode: isMoveMode,
};
};
export {
createFKeys,
createCursor,
createSelectionCursor,
createKeyboardController,
createPasteTool,
createSelectionTool,
};
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