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(function () { |
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'use strict'; |
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|
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var _typoKeys = { |
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family:'font-family', weight:'font-weight', style:'font-style', |
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decoration:'text-decoration', transform:'text-transform', |
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sizeDesktop:'font-size-d', sizeTablet:'font-size-t', sizeMobile:'font-size-m', |
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lineHeightDesktop:'line-height-d', lineHeightTablet:'line-height-t', lineHeightMobile:'line-height-m', |
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letterSpacingDesktop:'letter-spacing-d', letterSpacingTablet:'letter-spacing-t', letterSpacingMobile:'letter-spacing-m', |
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wordSpacingDesktop:'word-spacing-d', wordSpacingTablet:'word-spacing-t', wordSpacingMobile:'word-spacing-m' |
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}; |
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function typoCssVarsForEl(el, obj, prefix) { |
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if (!obj || typeof obj !== 'object') return; |
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Object.keys(_typoKeys).forEach(function (k) { |
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var v = obj[k]; |
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if (v === undefined || v === '' || v === null) return; |
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if (k === 'sizeDesktop' || k === 'sizeTablet' || k === 'sizeMobile') v = v + (obj.sizeUnit || 'px'); |
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else if (k === 'lineHeightDesktop' || k === 'lineHeightTablet' || k === 'lineHeightMobile') v = v + (obj.lineHeightUnit || ''); |
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else if (k === 'letterSpacingDesktop' || k === 'letterSpacingTablet' || k === 'letterSpacingMobile') v = v + (obj.letterSpacingUnit || 'px'); |
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else if (k === 'wordSpacingDesktop' || k === 'wordSpacingTablet' || k === 'wordSpacingMobile') v = v + (obj.wordSpacingUnit || 'px'); |
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el.style.setProperty(prefix + _typoKeys[k], String(v)); |
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}); |
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} |
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|
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var DEFAULT_PALETTE = ['#000000','#ffffff','#ef4444','#f97316','#f59e0b','#22c55e','#06b6d4','#3b82f6','#8b5cf6','#ec4899','#78716c','#94a3b8']; |
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|
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function initBlock(root) { |
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var optsRaw = root.getAttribute('data-opts'); |
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var opts; |
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try { opts = JSON.parse(optsRaw); } catch (e) { opts = {}; } |
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|
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var cols = opts.gridCols || 32; |
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var rows = opts.gridRows || 32; |
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var CS = opts.cellSize || 16; |
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var canvasBg = opts.canvasBg || '#ffffff'; |
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var gridColor = opts.gridLineColor || '#e5e7eb'; |
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var showGrid = opts.showGrid !== false; |
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var accent = opts.accentColor || '#6366f1'; |
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var titleColor = opts.titleColor || '#1e1b4b'; |
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var palette = (opts.palette && opts.palette.length) ? opts.palette : DEFAULT_PALETTE; |
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|
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if (opts.sectionBg) root.style.background = opts.sectionBg; |
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|
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var titleEl = root.querySelector('.bkbg-pxa-title'); |
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if (titleEl) { titleEl.style.color = titleColor; typoCssVarsForEl(titleEl, opts.titleTypo, '--bkbg-pxa-tt-'); } |
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var subEl = root.querySelector('.bkbg-pxa-subtitle'); |
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if (subEl) { subEl.style.color = titleColor; typoCssVarsForEl(subEl, opts.subtitleTypo, '--bkbg-pxa-st-'); } |
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|
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// ---- State ---- |
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var pixels = []; // rows x cols array of color strings or null |
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for (var r = 0; r < rows; r++) { pixels.push(new Array(cols).fill(null)); } |
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|
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var history = []; // undo stack (array of serialized states) |
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var tool = 'draw'; // 'draw' | 'fill' | 'erase' |
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var activeColor= palette[0]; |
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var drawing = false; |
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|
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// ---- Toolbar ---- |
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var toolbar = document.createElement('div'); |
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toolbar.className = 'bkbg-pxa-toolbar'; |
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root.appendChild(toolbar); |
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|
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var toolBtns = {}; |
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var tools = [['draw', '✏️ Draw'], ['fill', '🪣 Fill'], ['erase', '⬜ Erase']]; |
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tools.forEach(function (pair) { |
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var btn = document.createElement('button'); |
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btn.className = 'bkbg-pxa-tool-btn' + (pair[0] === tool ? ' bkbg-pxa-active' : ''); |
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btn.style.color = accent; |
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btn.textContent = pair[1]; |
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btn.addEventListener('click', function () { |
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tool = pair[0]; |
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Object.values(toolBtns).forEach(function (b) { b.classList.remove('bkbg-pxa-active'); }); |
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btn.classList.add('bkbg-pxa-active'); |
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}); |
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toolbar.appendChild(btn); |
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toolBtns[pair[0]] = btn; |
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}); |
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|
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// Separator |
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var sep = document.createElement('span'); |
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sep.style.cssText = 'width:1px;height:24px;background:#e5e7eb;margin:0 4px;'; |
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toolbar.appendChild(sep); |
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|
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// Color swatches |
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var swatchEls = []; |
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palette.forEach(function (color, i) { |
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var sw = document.createElement('div'); |
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sw.className = 'bkbg-pxa-swatch' + (i === 0 ? ' bkbg-pxa-selected' : ''); |
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sw.style.background = color; |
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// White swatch needs dark border |
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if (color === '#ffffff' || color === '#fff') sw.style.boxShadow = 'inset 0 0 0 1px #ccc'; |
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sw.addEventListener('click', function () { |
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activeColor = color; |
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tool = 'draw'; |
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Object.values(toolBtns).forEach(function (b) { b.classList.remove('bkbg-pxa-active'); }); |
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toolBtns['draw'].classList.add('bkbg-pxa-active'); |
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swatchEls.forEach(function (s) { s.classList.remove('bkbg-pxa-selected'); }); |
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sw.classList.add('bkbg-pxa-selected'); |
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}); |
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toolbar.appendChild(sw); |
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swatchEls.push(sw); |
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}); |
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|
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// Custom color picker |
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var colorPicker = document.createElement('input'); |
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colorPicker.type = 'color'; |
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colorPicker.value = '#ff0000'; |
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colorPicker.title = 'Custom color'; |
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colorPicker.style.cssText = 'width:26px;height:26px;border:none;border-radius:5px;cursor:pointer;padding:0;background:none;'; |
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colorPicker.addEventListener('input', function () { |
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activeColor = colorPicker.value; |
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tool = 'draw'; |
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Object.values(toolBtns).forEach(function (b) { b.classList.remove('bkbg-pxa-active'); }); |
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toolBtns['draw'].classList.add('bkbg-pxa-active'); |
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swatchEls.forEach(function (s) { s.classList.remove('bkbg-pxa-selected'); }); |
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}); |
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toolbar.appendChild(colorPicker); |
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|
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// ---- Canvas ---- |
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var canvasWrap = document.createElement('div'); |
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canvasWrap.className = 'bkbg-pxa-canvas-wrap'; |
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root.appendChild(canvasWrap); |
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|
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var canvas = document.createElement('canvas'); |
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canvas.className = 'bkbg-pxa-canvas'; |
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canvas.width = cols * CS; |
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canvas.height = rows * CS; |
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canvasWrap.appendChild(canvas); |
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var ctx = canvas.getContext('2d'); |
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|
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// Size info |
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var sizeInfo = document.createElement('div'); |
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sizeInfo.className = 'bkbg-pxa-size-info'; |
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sizeInfo.style.color = titleColor; |
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sizeInfo.textContent = cols + ' × ' + rows + ' pixels | Cell: ' + CS + 'px'; |
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root.appendChild(sizeInfo); |
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|
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// ---- Drawing ---- |
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function render() { |
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ctx.fillStyle = canvasBg; |
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ctx.fillRect(0, 0, canvas.width, canvas.height); |
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|
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for (var r = 0; r < rows; r++) { |
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for (var c = 0; c < cols; c++) { |
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if (pixels[r][c]) { |
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ctx.fillStyle = pixels[r][c]; |
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ctx.fillRect(c * CS, r * CS, CS, CS); |
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} |
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} |
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} |
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|
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if (showGrid) { |
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ctx.strokeStyle = gridColor; |
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ctx.lineWidth = 0.5; |
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for (var gc = 0; gc <= cols; gc++) { |
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ctx.beginPath(); |
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ctx.moveTo(gc * CS, 0); |
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ctx.lineTo(gc * CS, rows * CS); |
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ctx.stroke(); |
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} |
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for (var gr = 0; gr <= rows; gr++) { |
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ctx.beginPath(); |
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ctx.moveTo(0, gr * CS); |
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ctx.lineTo(cols * CS, gr * CS); |
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ctx.stroke(); |
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} |
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} |
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} |
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|
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function getCell(e) { |
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var rect = canvas.getBoundingClientRect(); |
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var scaleX = canvas.width / rect.width; |
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var scaleY = canvas.height / rect.height; |
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var x = (e.clientX - rect.left) * scaleX; |
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var y = (e.clientY - rect.top) * scaleY; |
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return [Math.floor(y / CS), Math.floor(x / CS)]; |
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} |
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|
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function getTouchCell(e) { |
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var t = e.touches[0] || e.changedTouches[0]; |
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return getCell({ clientX: t.clientX, clientY: t.clientY }); |
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} |
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|
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function saveHistory() { |
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history.push(pixels.map(function (row) { return row.slice(); })); |
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if (history.length > 40) history.shift(); |
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} |
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|
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function applyTool(r, c) { |
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if (r < 0 || r >= rows || c < 0 || c >= cols) return; |
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if (tool === 'draw') { |
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if (pixels[r][c] !== activeColor) { |
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pixels[r][c] = activeColor; |
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render(); |
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} |
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} else if (tool === 'erase') { |
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if (pixels[r][c]) { |
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pixels[r][c] = null; |
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render(); |
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} |
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} |
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} |
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|
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function floodFill(r, c, targetColor, fillColor) { |
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if (r < 0 || r >= rows || c < 0 || c >= cols) return; |
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if (pixels[r][c] !== targetColor) return; |
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if (pixels[r][c] === fillColor) return; |
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pixels[r][c] = fillColor; |
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floodFill(r+1, c, targetColor, fillColor); |
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floodFill(r-1, c, targetColor, fillColor); |
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floodFill(r, c+1, targetColor, fillColor); |
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floodFill(r, c-1, targetColor, fillColor); |
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} |
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|
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canvas.addEventListener('mousedown', function (e) { |
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e.preventDefault(); |
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var rc = getCell(e); |
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saveHistory(); |
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if (tool === 'fill') { |
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var target = pixels[rc[0]][rc[1]]; |
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if (target !== activeColor) floodFill(rc[0], rc[1], target, activeColor); |
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render(); return; |
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} |
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drawing = true; |
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applyTool(rc[0], rc[1]); |
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}); |
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|
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canvas.addEventListener('mousemove', function (e) { |
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if (!drawing) return; |
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var rc = getCell(e); |
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applyTool(rc[0], rc[1]); |
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}); |
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|
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window.addEventListener('mouseup', function () { drawing = false; }); |
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|
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canvas.addEventListener('touchstart', function (e) { |
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e.preventDefault(); |
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var rc = getTouchCell(e); |
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saveHistory(); |
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if (tool === 'fill') { |
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var target = pixels[rc[0]][rc[1]]; |
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if (target !== activeColor) floodFill(rc[0], rc[1], target, activeColor); |
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render(); return; |
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} |
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drawing = true; |
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applyTool(rc[0], rc[1]); |
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}, { passive: false }); |
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|
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canvas.addEventListener('touchmove', function (e) { |
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e.preventDefault(); |
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if (!drawing) return; |
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var rc = getTouchCell(e); |
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applyTool(rc[0], rc[1]); |
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}, { passive: false }); |
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|
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canvas.addEventListener('touchend', function () { drawing = false; }); |
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|
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// ---- Action buttons ---- |
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var actions = document.createElement('div'); |
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actions.className = 'bkbg-pxa-actions'; |
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root.appendChild(actions); |
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|
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function addBtn(label, bg, textCol, fn) { |
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var btn = document.createElement('button'); |
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btn.className = 'bkbg-pxa-btn'; |
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btn.textContent = label; |
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btn.style.background = bg; |
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btn.style.color = textCol; |
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btn.addEventListener('click', fn); |
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actions.appendChild(btn); |
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return btn; |
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} |
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|
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addBtn('↩ Undo', '#e5e7eb', '#374151', function () { |
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if (!history.length) return; |
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pixels = history.pop(); |
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render(); |
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}); |
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|
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addBtn('🗑️ Clear', '#fef2f2', '#ef4444', function () { |
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saveHistory(); |
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pixels = []; |
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for (var r = 0; r < rows; r++) pixels.push(new Array(cols).fill(null)); |
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render(); |
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}); |
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|
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if (opts.showDownload !== false) { |
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addBtn('⬇️ Download PNG', '#22c55e', '#fff', function () { |
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// Render without grid lines for download |
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var tmpCanvas = document.createElement('canvas'); |
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tmpCanvas.width = cols * CS; |
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tmpCanvas.height = rows * CS; |
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var tctx = tmpCanvas.getContext('2d'); |
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tctx.fillStyle = canvasBg; |
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tctx.fillRect(0, 0, tmpCanvas.width, tmpCanvas.height); |
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for (var r = 0; r < rows; r++) { |
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for (var c = 0; c < cols; c++) { |
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if (pixels[r][c]) { |
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tctx.fillStyle = pixels[r][c]; |
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tctx.fillRect(c * CS, r * CS, CS, CS); |
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} |
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} |
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} |
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tmpCanvas.toBlob(function (blob) { |
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if (!blob) return; |
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var url = URL.createObjectURL(blob); |
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var a = document.createElement('a'); |
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a.href = url; a.download = 'pixel-art.png'; a.click(); |
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URL.revokeObjectURL(url); |
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}); |
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}); |
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} |
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|
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render(); |
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} |
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|
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document.querySelectorAll('.bkbg-pxa-app').forEach(function (root) { |
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initBlock(root); |
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}); |
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})(); |
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|
