editor.js
function editorCanvas(height, retina) {
"use strict";
var canvas, palette, codepage, previewCanvas, ctx, previewCtx, imageData, previewImageData, image, undoQueue;
function createElement(elementName, args) {
var element;
args = args || {};
element = document.createElement(elementName);
Object.getOwnPropertyNames(args).forEach(function (name) {
if (typeof args[name] === "object") {
Object.getOwnPropertyNames(args[name]).forEach(function (subName) {
element[name][subName] = args[name][subName];
});
} else {
element[name] = args[name];
}
});
return element;
}
palette = (function () {
var currentColor, paletteCanvas, COLORS, lastColor;
function egaRGB(value) {
return new Uint8Array([
(((value & 32) >> 5) + ((value & 4) >> 1)) * 0x55,
(((value & 16) >> 4) + ((value & 2))) * 0x55,
(((value & 8) >> 3) + ((value & 1) << 1)) * 0x55,
255
]);
}
COLORS = [0, 1, 2, 3, 4, 5, 20, 7, 56, 57, 58, 59, 60, 61, 62, 63].map(egaRGB);
function styleRGBA(rgba) {
return "rgba(" + rgba[0] + ", " + rgba[1] + ", " + rgba[2] + ", " + rgba[3] + ")";
}
function setColor(col) {
var evt, paletteCtx;
if (col !== currentColor) {
lastColor = currentColor;
paletteCtx = paletteCanvas.getContext("2d");
paletteCtx.fillStyle = styleRGBA(COLORS[col]);
paletteCtx.fillRect(0, paletteCanvas.height / 2, paletteCanvas.width, paletteCanvas.height / 2);
currentColor = col;
evt = new CustomEvent("colorChange", {"detail": currentColor});
document.dispatchEvent(evt);
}
}
function keydown(evt) {
var keyCode, modifier;
keyCode = evt.keyCode || evt.which;
modifier = evt.metaKey || evt.altKey || evt.ctrlKey;
if (!modifier) {
if (keyCode >= 49 && keyCode <= 56) {
evt.preventDefault();
setColor(keyCode - 49 + (evt.shiftKey ? 8 : 0));
} else {
switch (keyCode) {
case 9:
evt.preventDefault();
if (lastColor !== undefined) {
setColor(lastColor);
}
break;
case 81:
evt.preventDefault();
setColor((currentColor === 0) ? 15 : currentColor - 1);
break;
case 87:
evt.preventDefault();
setColor((currentColor === 15) ? 0 : currentColor + 1);
break;
}
}
}
}
function init() {
var divPalette, paletteCtx, i;
divPalette = document.getElementById("palette");
paletteCanvas = createElement("canvas", {"width": retina ? 320 : 160, "height": retina ? 320 : 160, "style": {"width": "160px", "height": "160px", "verticalAlign": "bottom"}});
paletteCtx = paletteCanvas.getContext("2d");
for (i = 0; i < 16; ++i) {
paletteCtx.fillStyle = styleRGBA(COLORS[i]);
paletteCtx.fillRect((i % 8) * paletteCanvas.width / 8, (i < 8) ? paletteCanvas.height / 4 : 0, paletteCanvas.width / 8, paletteCanvas.height / 4);
}
paletteCanvas.onclick = function (evt) {
var x, y, col;
x = evt.clientX - document.getElementById("toolkit").offsetLeft;
y = evt.clientY - divPalette.offsetTop;
col = (1 - Math.floor(y / 40)) * 8 + Math.floor(x / 20);
if (col >= 0) {
setColor(col);
}
};
setColor(7);
divPalette.appendChild(paletteCanvas);
document.addEventListener("keydown", keydown, false);
}
function getCurrentColor() {
return currentColor;
}
return {
"init": init,
"COLORS": COLORS,
"getCurrentColor": getCurrentColor
};
}());
codepage = (function () {
var BASE64_CHARS, FONT_80X25, FONT_80X25_SMALL, bigFontBuffer, smallFontBuffer, NULL, SPACE, UPPER_HALF_BLOCK, LOWER_HALF_BLOCK, LIGHT_SHADE, MEDIUM_SHADE, DARK_SHADE, FULL_BLOCK, BULLET_OPERATOR, MIDDLE_DOT, NO_BREAK_SPACE;
NULL = 0;
SPACE = 32;
UPPER_HALF_BLOCK = 223;
LOWER_HALF_BLOCK = 220;
LIGHT_SHADE = 176;
MEDIUM_SHADE = 177;
DARK_SHADE = 178;
FULL_BLOCK = 219;
BULLET_OPERATOR = 249;
MIDDLE_DOT = 250;
NO_BREAK_SPACE = 255;
BASE64_CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
bigFontBuffer = [];
smallFontBuffer = [];
function base64ToBits(text) {
var i, j, k, bytes16, bytes8, bits;
bytes16 = new Uint32Array(1);
bytes8 = new Uint8Array(text.length / 4 * 3);
for (i = j = 0; i < text.length; bytes16[0] = 0) {
bytes16[0] += (BASE64_CHARS.indexOf(text.charAt(i++)) & 63) << 18;
bytes16[0] += (BASE64_CHARS.indexOf(text.charAt(i++)) & 63) << 12;
bytes16[0] += (BASE64_CHARS.indexOf(text.charAt(i++)) & 63) << 6;
bytes16[0] += BASE64_CHARS.indexOf(text.charAt(i++)) & 63;
bytes8[j++] = (bytes16[0] >> 16) & 255;
bytes8[j++] = (bytes16[0] >> 8) & 255;
bytes8[j++] = bytes16[0] & 255;
}
bits = new Uint8Array(9 * 16 * 256);
for (i = 0, k = 0; i < 9 * 16 * 256 / 8; ++i) {
for (j = 7; j >= 0; --j) {
bits[k++] = (bytes8[i] >> j) & 1;
}
}
return bits;
}
FONT_80X25 = base64ToBits("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");
FONT_80X25_SMALL = base64ToBits("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");
function doubleScale(rgbaSource, fontWidth) {
var byteWidth, doubledByteWidth, rgba, rgbaDoubled, startOfRow, i, k;
byteWidth = fontWidth * 4;
doubledByteWidth = byteWidth * 2;
rgbaDoubled = new Uint8Array(rgbaSource.length * 4);
for (i = 0, k = 0; i < rgbaSource.length; i += 4) {
rgba = rgbaSource.subarray(i, i + 4);
rgbaDoubled.set(rgba, k);
k += 4;
rgbaDoubled.set(rgba, k);
k += 4;
if ((i + 4) % byteWidth === 0) {
startOfRow = k - doubledByteWidth;
rgbaDoubled.set(rgbaDoubled.subarray(startOfRow, startOfRow + doubledByteWidth), k);
k += doubledByteWidth;
}
}
return rgbaDoubled;
}
function scaleCanvas(sourceData, width, height, chunkWidth, chunkHeight) {
var destWidth, destHeight, destData, rgba, pixelRowOffset, chunkSize, i, j, k, x, y, r, g, b, a;
rgba = new Uint8Array(4);
destWidth = width / chunkWidth;
destHeight = height / chunkHeight;
destData = new Uint8Array(destWidth * destHeight * 4);
pixelRowOffset = (width - chunkWidth) * 4;
chunkSize = chunkWidth * chunkHeight;
for (i = x = y = 0; i < destData.length; i += 4) {
for (j = r = g = b = a = 0, k = (y * width * chunkHeight + x * chunkWidth) * 4; j < chunkSize; ++j) {
r += sourceData[k++];
g += sourceData[k++];
b += sourceData[k++];
a += sourceData[k++];
if ((j + 1) % chunkWidth === 0) {
k += pixelRowOffset;
}
}
rgba[0] = Math.round(r / chunkSize);
rgba[1] = Math.round(g / chunkSize);
rgba[2] = Math.round(b / chunkSize);
rgba[3] = Math.round(a / chunkSize);
destData.set(rgba, i);
if (++x === destWidth) {
x = 0;
++y;
}
}
return destData;
}
function getData(charCode, fg, bg, width, height, data, excludeNinthBit) {
var fontBitWidth, rgbaOutput, i, j, k;
fontBitWidth = width * height;
rgbaOutput = new Uint8Array((excludeNinthBit ? width - 1 : width) * height * 4);
for (i = 0, j = charCode * fontBitWidth, k = 0; i < fontBitWidth; ++i, ++j) {
if (!excludeNinthBit || (i + 1) % 9 !== 0) {
if (data[j]) {
rgbaOutput.set(palette.COLORS[fg], k);
} else {
rgbaOutput.set(palette.COLORS[bg], k);
}
k += 4;
}
}
return rgbaOutput;
}
function bigFont(charCode, fg, bg) {
var bufferIndex;
bufferIndex = charCode + (fg << 8) + (bg << 12);
if (!bigFontBuffer[bufferIndex]) {
bigFontBuffer[bufferIndex] = getData(charCode, fg, bg, 9, 16, FONT_80X25, true);
if (retina) {
bigFontBuffer[bufferIndex] = doubleScale(bigFontBuffer[bufferIndex], 8);
}
}
return bigFontBuffer[bufferIndex];
}
function smallFont(charCode, fg, bg) {
var bufferIndex;
bufferIndex = charCode + (fg << 8) + (bg << 12);
if (!smallFontBuffer[bufferIndex]) {
smallFontBuffer[bufferIndex] = getData(charCode, fg, bg, 4, 8, FONT_80X25_SMALL, false);
if (!retina) {
smallFontBuffer[bufferIndex] = scaleCanvas(smallFontBuffer[bufferIndex], 4, 8, 2, 2);
}
}
return smallFontBuffer[bufferIndex];
}
return {
"bigFont": bigFont,
"smallFont": smallFont,
"NULL": NULL,
"SPACE": SPACE,
"UPPER_HALF_BLOCK": UPPER_HALF_BLOCK,
"LOWER_HALF_BLOCK": LOWER_HALF_BLOCK,
"LIGHT_SHADE": LIGHT_SHADE,
"MEDIUM_SHADE": MEDIUM_SHADE,
"DARK_SHADE": DARK_SHADE,
"FULL_BLOCK": FULL_BLOCK,
"BULLET_OPERATOR": BULLET_OPERATOR,
"MIDDLE_DOT": MIDDLE_DOT,
"NO_BREAK_SPACE": NO_BREAK_SPACE
};
}());
image = new Uint8Array(80 * height * 3);
undoQueue = [];
function draw(charCode, x, y, fg, bg) {
previewImageData.data.set(codepage.smallFont(charCode, fg, bg), 0);
imageData.data.set(codepage.bigFont(charCode, fg, bg), 0);
previewCtx.putImageData(previewImageData, x * previewImageData.width, y * previewImageData.height);
ctx.putImageData(imageData, x * imageData.width, y * imageData.height);
}
function update(index) {
draw(image[index], (index / 3) % 80, Math.floor(index / 240), image[index + 1], image[index + 2]);
}
function redraw() {
var i;
for (i = 0; i < image.length; i += 3) {
update(i);
}
}
function set(charCode, fg, bg, index) {
undoQueue[0].push([image[index], image[index + 1], image[index + 2], index]);
image[index] = charCode;
image[index + 1] = fg;
image[index + 2] = bg;
update(index);
}
function get(coord) {
var index, charCode, foreground, background, isBlocky, upperBlockColor, lowerBlockColor;
index = (coord.textY * 80 + coord.textX) * 3;
charCode = image[index];
foreground = image[index + 1];
background = image[index + 2];
switch (charCode) {
case codepage.NULL:
case codepage.SPACE:
case codepage.NO_BREAK_SPACE:
upperBlockColor = background;
lowerBlockColor = background;
isBlocky = true;
break;
case codepage.UPPER_HALF_BLOCK:
upperBlockColor = foreground;
lowerBlockColor = background;
isBlocky = true;
break;
case codepage.LOWER_HALF_BLOCK:
upperBlockColor = background;
lowerBlockColor = foreground;
isBlocky = true;
break;
case codepage.FULL_BLOCK:
upperBlockColor = foreground;
lowerBlockColor = foreground;
isBlocky = true;
break;
default:
if (foreground === background) {
isBlocky = true;
upperBlockColor = foreground;
lowerBlockColor = foreground;
} else {
isBlocky = false;
}
}
return {
"charCode": charCode,
"foreground": foreground,
"background": background,
"isBlocky": isBlocky,
"upperBlockColor": upperBlockColor,
"lowerBlockColor": lowerBlockColor
};
}
function setChunk(coord, color) {
var block;
block = get(coord);
if (block.isBlocky) {
if (coord.isUpperHalf) {
if (block.lowerBlockColor === color) {
set(codepage.FULL_BLOCK, color, block.background, coord.index);
} else {
set(codepage.UPPER_HALF_BLOCK, color, block.lowerBlockColor, coord.index);
}
} else {
if (block.upperBlockColor === color) {
set(codepage.FULL_BLOCK, color, block.background, coord.index);
} else {
set(codepage.LOWER_HALF_BLOCK, color, block.upperBlockColor, coord.index);
}
}
} else {
if (coord.isUpperHalf) {
set(codepage.UPPER_HALF_BLOCK, color, block.background, coord.index);
} else {
set(codepage.LOWER_HALF_BLOCK, color, block.background, coord.index);
}
}
}
function getBlockCoord(blockX, blockY) {
var x, y, textY, modBlockY;
x = blockX * 8;
y = blockY * 16;
textY = Math.floor(blockY / 2);
modBlockY = blockY % 2;
return {
"index": (textY * 80 + blockX) * 3,
"x": x,
"y": y,
"textX": blockX,
"textY": textY,
"blockX": blockX,
"blockY": blockY,
"isUpperHalf": (modBlockY === 0),
"isLowerHalf": (modBlockY === 1)
};
}
function chunkLine(from, to, callback) {
var x0, y0, x1, y1, dx, dy, sx, sy, err, e2;
x0 = from.blockX;
y0 = from.blockY;
x1 = to.blockX;
y1 = to.blockY;
dx = Math.abs(x1 - x0);
sx = (x0 < x1) ? 1 : -1;
dy = Math.abs(y1 - y0);
sy = (y0 < y1) ? 1 : -1;
err = ((dx > dy) ? dx : -dy) / 2;
while (true) {
callback(getBlockCoord(x0, y0));
if (x0 === x1 && y0 === y1) {
break;
}
e2 = err;
if (e2 > -dx) {
err -= dy;
x0 += sx;
}
if (e2 < dy) {
err += dx;
y0 += sy;
}
}
}
function setChar(charCode, color, coord) {
var block;
block = get(coord);
if (block.isBlocky) {
if (coord.isUpperHalf) {
set(charCode, color, block.upperBlockColor, coord.index);
} else {
set(charCode, color, block.lowerBlockColor, coord.index);
}
} else {
set(charCode, color, block.background, coord.index);
}
}
function resolveConflict(coord, currentColorBias) {
var block, currentColor;
block = get(coord);
currentColor = palette.getCurrentColor();
if (block.background > 7) {
if (block.isBlocky) {
if (block.foreground > 7) {
if (currentColorBias) {
if (block.upperBlockColor === currentColor && block.lowerBlockColor === currentColor) {
set(codepage.FULL_BLOCK, currentColor, 0, coord.index);
} else if (block.upperBlockColor === currentColor) {
set(codepage.UPPER_HALF_BLOCK, block.upperBlockColor, block.lowerBlockColor - 8, coord.index);
} else if (block.lowerBlockColor === currentColor) {
set(codepage.LOWER_HALF_BLOCK, block.lowerBlockColor, block.upperBlockColor - 8, coord.index);
} else {
set(image[coord.index], block.foreground, block.background - 8, coord.index);
}
} else {
if (block.upperBlockColor === currentColor && block.lowerBlockColor === currentColor) {
set(codepage.FULL_BLOCK, currentColor, 0, coord.index);
} else if (block.upperBlockColor === currentColor) {
set(codepage.LOWER_HALF_BLOCK, block.lowerBlockColor, block.upperBlockColor - 8, coord.index);
} else if (block.lowerBlockColor === currentColor) {
set(codepage.UPPER_HALF_BLOCK, block.upperBlockColor, block.lowerBlockColor - 8, coord.index);
} else {
set(image[coord.index], block.foreground, block.background - 8, coord.index);
}
}
} else {
if ((block.upperBlockColor === block.background) && (block.lowerBlockColor === block.background)) {
set(codepage.FULL_BLOCK, block.background, block.foreground, coord.index);
} else if (block.upperBlockColor === block.background) {
set(codepage.UPPER_HALF_BLOCK, block.background, block.foreground, coord.index);
} else if (block.lowerBlockColor === block.background) {
set(codepage.LOWER_HALF_BLOCK, block.background, block.foreground, coord.index);
} else {
set(codepage.FULL_BLOCK, block.foreground, block.background - 8, coord.index);
}
}
} else {
set(image[coord.index], block.foreground, block.background - 8, coord.index);
}
}
}
function resolveConflicts(currentColorBias) {
var i;
for (i = 0; i < image.length; i += 3) {
resolveConflict({"textX": (i / 3) % 80, "textY": Math.floor(i / 240), "index": i}, currentColorBias);
}
}
function init(divEditor) {
var mousedown, shiftKey, altKey;
mousedown = false;
shiftKey = false;
altKey = false;
palette.init();
canvas = createElement("canvas", {"width": retina ? 1280 : 640, "height": retina ? height * 32 : height * 16, "style": {"width": "640px", "height": (height * 16) + "px", "verticalAlign": "bottom"}});
previewCanvas = createElement("canvas", {"width": retina ? 320 : 160, "height": retina ? height * 8 : height * 4, "style": {"width": "160px", "height": (height * 4) + "px", "verticalAlign": "bottom"}});
ctx = canvas.getContext("2d");
previewCtx = previewCanvas.getContext("2d");
imageData = ctx.createImageData(retina ? 16 : 8, retina ? 32 : 16);
previewImageData = ctx.createImageData(retina ? 4 : 2, retina ? 8 : 4);
redraw();
function getCoord(pageX, pageY) {
var x, y, coord;
x = pageX - divEditor.offsetLeft;
y = pageY - divEditor.offsetTop;
coord = getBlockCoord(Math.floor(x / 8), Math.floor(y / 8));
coord.x = x;
coord.y = y;
coord.shiftKey = shiftKey;
coord.altKey = altKey;
return coord;
}
canvas.addEventListener("mousedown", function (evt) {
mousedown = true;
document.dispatchEvent(new CustomEvent("canvasDown", {"detail": getCoord(evt.pageX, evt.pageY)}));
}, false);
canvas.addEventListener("mouseup", function () {
mousedown = false;
}, false);
canvas.addEventListener("mousemove", function (evt) {
document.dispatchEvent(new CustomEvent(mousedown ? "canvasDrag" : "canvasMove", {"detail": getCoord(evt.pageX, evt.pageY)}));
}, false);
canvas.addEventListener("mouseout", function () {
mousedown = false;
}, false);
document.addEventListener("keydown", function (evt) {
switch (evt.keyCode || evt.which) {
case 16:
shiftKey = true;
break;
case 18:
altKey = true;
break;
}
}, false);
document.addEventListener("keyup", function (evt) {
switch (evt.keyCode || evt.which) {
case 16:
shiftKey = false;
break;
case 18:
altKey = false;
break;
}
}, false);
divEditor.appendChild(canvas);
document.getElementById("preview").appendChild(previewCanvas);
}
function undo() {
var values, i;
if (undoQueue.length) {
values = undoQueue.shift();
for (i = values.length - 1; i >= 0; --i) {
image[values[i][3]] = values[i][0];
image[values[i][3] + 1] = values[i][1];
image[values[i][3] + 2] = values[i][2];
update(values[i][3]);
}
}
}
function takeUndoSnapshot() {
if (undoQueue.unshift([]) > 32) {
undoQueue.pop();
}
}
function clearUndoHistory() {
while (undoQueue.length) {
undoQueue.pop();
}
}
return {
"init": init,
"height": height,
"palette": palette,
"codepage": codepage,
"set": set,
"get": get,
"getBlockCoord": getBlockCoord,
"setChunk": setChunk,
"chunkLine": chunkLine,
"setChar": setChar,
"resolveConflict": resolveConflict,
"resolveConflicts": resolveConflicts,
"redraw": redraw,
"image": image,
"takeUndoSnapshot": takeUndoSnapshot,
"clearUndoHistory": clearUndoHistory,
"undo": undo
};
}
