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(function () { |
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'use strict'; |
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|
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var SPEEDS = { slow: 180, medium: 120, fast: 70, insane: 35 }; |
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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]; 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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function initBlock(root) { |
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var opts = {}; |
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try { opts = JSON.parse(root.getAttribute('data-opts') || '{}'); } catch (e) {} |
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|
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var snakeColor = opts.snakeColor || '#22c55e'; |
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var snakeHeadColor= opts.snakeHeadColor|| '#16a34a'; |
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var foodColor = opts.foodColor || '#ef4444'; |
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var gridColor = opts.gridColor || '#f3f4f6'; |
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var boardBg = opts.boardBg || '#ffffff'; |
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var sectionBg = opts.sectionBg || '#f0fdf4'; |
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var accentColor = opts.accentColor || '#22c55e'; |
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var titleColor = opts.titleColor || '#14532d'; |
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var gridSize = parseInt(opts.gridSize || 20, 10); |
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var canvasSize = parseInt(opts.canvasSize || 400, 10); |
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var wallsKill = opts.wallsKill === true; |
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var showHighScore = opts.showHighScore !== false; |
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var showControls = opts.showControls !== false; |
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var defaultSpeed = opts.defaultSpeed || 'medium'; |
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var fontSize = opts.fontSize || 28; |
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var subtitleSize = opts.subtitleSize || 14; |
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|
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root.style.background = sectionBg; |
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root.style.borderRadius = '16px'; |
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root.style.padding = '28px 20px'; |
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root.style.textAlign = 'center'; |
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|
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var titleEl = root.querySelector('.bkbg-snk-title'); |
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var subEl = root.querySelector('.bkbg-snk-subtitle'); |
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if (titleEl) { titleEl.style.color = titleColor; titleEl.style.margin = '0 0 4px'; } |
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if (subEl) { subEl.style.color = titleColor + 'bb'; subEl.style.margin = '0 0 14px'; } |
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|
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// Apply typography CSS vars to root |
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typoCssVarsForEl(root, opts.titleTypo, '--bksnk-tt-'); |
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typoCssVarsForEl(root, opts.subtitleTypo, '--bksnk-st-'); |
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|
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var uid = Math.random().toString(36).slice(2); |
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var highScoreKey = 'bkbg_snake_hs_' + uid; |
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var highScore = parseInt(localStorage.getItem(highScoreKey) || 0, 10); |
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|
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var cell = canvasSize / gridSize; |
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var currentSpeed = defaultSpeed; |
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var snake, dir, nextDir, food, score, running, gameOver, loop; |
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|
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var inner = document.createElement('div'); |
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root.appendChild(inner); |
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|
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function buildUI() { |
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inner.innerHTML = ''; |
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|
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// Score row |
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var scoreRow = document.createElement('div'); |
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scoreRow.className = 'bkbg-snk-score-row'; |
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var scoreEl = document.createElement('div'); |
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scoreEl.id = 'bkbg-snk-score-' + uid; |
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scoreEl.textContent = 'Score: ' + (score || 0); |
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scoreEl.style.color = titleColor; |
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scoreRow.appendChild(scoreEl); |
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if (showHighScore) { |
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var hsEl = document.createElement('div'); |
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hsEl.id = 'bkbg-snk-hs-' + uid; |
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hsEl.textContent = 'Best: ' + highScore; |
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hsEl.style.color = accentColor; |
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scoreRow.appendChild(hsEl); |
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} |
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inner.appendChild(scoreRow); |
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|
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// Speed tabs |
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var speedRow = document.createElement('div'); |
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speedRow.className = 'bkbg-snk-speed-row'; |
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['slow','medium','fast','insane'].forEach(function (sp) { |
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var btn = document.createElement('button'); |
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btn.className = 'bkbg-snk-speed-btn'; |
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btn.textContent = sp.charAt(0).toUpperCase() + sp.slice(1); |
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btn.style.borderColor = accentColor; |
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var active = sp === currentSpeed; |
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btn.style.background = active ? accentColor : 'transparent'; |
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btn.style.color = active ? '#fff' : accentColor; |
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btn.addEventListener('click', function () { |
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currentSpeed = sp; |
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buildUI(); |
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startGame(); |
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}); |
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speedRow.appendChild(btn); |
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}); |
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inner.appendChild(speedRow); |
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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-snk-canvas-wrap'; |
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var canvas = document.createElement('canvas'); |
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canvas.className = 'bkbg-snk-canvas'; |
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canvas.width = canvasSize; |
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canvas.height = canvasSize; |
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canvas.tabIndex = 0; |
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canvas.style.borderColor = accentColor; |
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canvas.style.maxWidth = '100%'; |
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canvasWrap.appendChild(canvas); |
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inner.appendChild(canvasWrap); |
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|
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// Touch controls |
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if (showControls) { |
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var ctrls = document.createElement('div'); |
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ctrls.className = 'bkbg-snk-controls'; |
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var upRow = document.createElement('div'); |
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upRow.className = 'bkbg-snk-ctrl-row'; |
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var midRow = document.createElement('div'); |
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midRow.className = 'bkbg-snk-ctrl-row'; |
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|
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function makeCtrl(label, action) { |
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var b = document.createElement('button'); |
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b.className = 'bkbg-snk-ctrl-btn'; |
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b.textContent = label; |
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b.style.borderColor = accentColor; |
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b.style.color = accentColor; |
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b.addEventListener('click', action); |
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return b; |
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} |
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upRow.appendChild(makeCtrl('▲', function () { tryDir('UP'); })); |
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midRow.appendChild(makeCtrl('◀', function () { tryDir('LEFT'); })); |
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midRow.appendChild(makeCtrl('▼', function () { tryDir('DOWN'); })); |
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midRow.appendChild(makeCtrl('▶', function () { tryDir('RIGHT'); })); |
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ctrls.appendChild(upRow); |
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ctrls.appendChild(midRow); |
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inner.appendChild(ctrls); |
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} |
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|
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// Actions |
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var actions = document.createElement('div'); |
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actions.className = 'bkbg-snk-actions'; |
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var startBtn = document.createElement('button'); |
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startBtn.className = 'bkbg-snk-btn'; |
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startBtn.style.background = accentColor; |
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startBtn.textContent = 'New Game'; |
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startBtn.addEventListener('click', function () { buildUI(); startGame(); }); |
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actions.appendChild(startBtn); |
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inner.appendChild(actions); |
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|
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// Keyboard |
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var handleKey = function (e) { |
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if (!running) { if (e.key === ' ') { startGame(); } return; } |
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var map = { ArrowUp:'UP', ArrowDown:'DOWN', ArrowLeft:'LEFT', ArrowRight:'RIGHT', w:'UP', s:'DOWN', a:'LEFT', d:'RIGHT' }; |
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if (map[e.key]) { e.preventDefault(); tryDir(map[e.key]); } |
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}; |
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document.addEventListener('keydown', handleKey); |
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|
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// Draw initial idle state |
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draw(canvas, null, null, false); |
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|
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return canvas; |
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} |
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|
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function tryDir(d) { |
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var opposite = { UP:'DOWN', DOWN:'UP', LEFT:'RIGHT', RIGHT:'LEFT' }; |
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if (dir !== opposite[d]) nextDir = d; |
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} |
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|
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function startGame() { |
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clearInterval(loop); |
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running = true; |
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gameOver = false; |
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score = 0; |
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dir = 'RIGHT'; |
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nextDir = 'RIGHT'; |
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var mid = Math.floor(gridSize / 2); |
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snake = [[mid, mid],[mid-1, mid],[mid-2, mid]]; |
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placeFood(); |
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updateScoreUI(); |
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|
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var canvas = inner.querySelector('canvas'); |
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if (!canvas) return; |
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|
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loop = setInterval(function () { |
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if (!running) { clearInterval(loop); return; } |
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tick(); |
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draw(canvas, snake, food, true); |
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}, SPEEDS[currentSpeed] || 120); |
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} |
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|
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function tick() { |
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dir = nextDir; |
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var head = snake[0].slice(); |
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if (dir === 'UP') head[1]--; |
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if (dir === 'DOWN') head[1]++; |
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if (dir === 'LEFT') head[0]--; |
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if (dir === 'RIGHT') head[0]++; |
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|
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// Wall collision |
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if (wallsKill) { |
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if (head[0] < 0 || head[0] >= gridSize || head[1] < 0 || head[1] >= gridSize) { |
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endGame(); return; |
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} |
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} else { |
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head[0] = (head[0] + gridSize) % gridSize; |
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head[1] = (head[1] + gridSize) % gridSize; |
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} |
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|
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// Self collision |
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for (var i = 0; i < snake.length; i++) { |
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if (snake[i][0] === head[0] && snake[i][1] === head[1]) { endGame(); return; } |
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} |
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|
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snake.unshift(head); |
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|
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// Food eaten |
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if (head[0] === food[0] && head[1] === food[1]) { |
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score += 10; |
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if (score > highScore) { highScore = score; localStorage.setItem(highScoreKey, highScore); } |
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updateScoreUI(); |
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placeFood(); |
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} else { |
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snake.pop(); |
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} |
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} |
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|
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function placeFood() { |
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var empty = []; |
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for (var x = 0; x < gridSize; x++) { |
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for (var y = 0; y < gridSize; y++) { |
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var onSnake = snake.some(function (s) { return s[0] === x && s[1] === y; }); |
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if (!onSnake) empty.push([x, y]); |
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} |
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} |
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food = empty[Math.floor(Math.random() * empty.length)] || [gridSize-1, gridSize-1]; |
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} |
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|
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function endGame() { |
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running = false; |
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gameOver = true; |
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clearInterval(loop); |
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var canvas = inner.querySelector('canvas'); |
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if (canvas) drawGameOver(canvas); |
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} |
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|
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function updateScoreUI() { |
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var se = document.getElementById('bkbg-snk-score-' + uid); |
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if (se) se.textContent = 'Score: ' + score; |
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var he = document.getElementById('bkbg-snk-hs-' + uid); |
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if (he) he.textContent = 'Best: ' + highScore; |
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} |
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|
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function draw(canvas, snk, fd, started) { |
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var ctx = canvas.getContext('2d'); |
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ctx.fillStyle = boardBg; |
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ctx.fillRect(0, 0, canvasSize, canvasSize); |
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|
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// Grid |
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ctx.strokeStyle = gridColor; |
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ctx.lineWidth = 0.5; |
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for (var i = 0; i <= gridSize; i++) { |
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ctx.beginPath(); ctx.moveTo(i * cell, 0); ctx.lineTo(i * cell, canvasSize); ctx.stroke(); |
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ctx.beginPath(); ctx.moveTo(0, i * cell); ctx.lineTo(canvasSize, i * cell); ctx.stroke(); |
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} |
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|
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if (!started) { |
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// Idle message |
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ctx.fillStyle = 'rgba(0,0,0,0.45)'; |
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ctx.fillRect(canvasSize/2-90, canvasSize/2-20, 180, 40); |
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ctx.fillStyle = '#fff'; |
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ctx.font = 'bold 14px system-ui'; |
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ctx.textAlign = 'center'; |
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ctx.textBaseline = 'middle'; |
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ctx.fillText('Press SPACE or New Game', canvasSize/2, canvasSize/2); |
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return; |
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} |
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|
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// Food |
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ctx.fillStyle = foodColor; |
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ctx.beginPath(); |
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ctx.arc(fd[0]*cell + cell/2, fd[1]*cell + cell/2, cell/2 - 1, 0, Math.PI*2); |
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ctx.fill(); |
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|
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// Snake body |
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ctx.fillStyle = snakeColor; |
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for (var j = 1; j < snk.length; j++) { |
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ctx.beginPath(); |
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ctx.roundRect(snk[j][0]*cell+1, snk[j][1]*cell+1, cell-2, cell-2, 3); |
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ctx.fill(); |
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} |
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|
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// Snake head |
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ctx.fillStyle = snakeHeadColor; |
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ctx.beginPath(); |
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ctx.roundRect(snk[0][0]*cell+1, snk[0][1]*cell+1, cell-2, cell-2, 5); |
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ctx.fill(); |
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} |
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|
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function drawGameOver(canvas) { |
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var ctx = canvas.getContext('2d'); |
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ctx.fillStyle = 'rgba(0,0,0,0.55)'; |
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ctx.fillRect(0, 0, canvasSize, canvasSize); |
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ctx.fillStyle = '#fff'; |
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ctx.font = 'bold 28px system-ui'; |
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ctx.textAlign = 'center'; |
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ctx.textBaseline = 'middle'; |
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ctx.fillText('Game Over', canvasSize/2, canvasSize/2 - 20); |
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ctx.font = '16px system-ui'; |
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ctx.fillText('Score: ' + score, canvasSize/2, canvasSize/2 + 14); |
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ctx.font = '14px system-ui'; |
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ctx.fillStyle = 'rgba(255,255,255,0.7)'; |
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ctx.fillText('Press Space or New Game', canvasSize/2, canvasSize/2 + 42); |
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} |
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|
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buildUI(); |
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} |
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|
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function init() { |
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document.querySelectorAll('.bkbg-snk-app').forEach(function (root) { |
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initBlock(root); |
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}); |
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} |
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|
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if (document.readyState === 'loading') { |
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document.addEventListener('DOMContentLoaded', init); |
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} else { |
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init(); |
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} |
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})(); |
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|
