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(function () { |
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'use strict'; |
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|
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var svgNS = 'http://www.w3.org/2000/svg'; |
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|
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function buildPath(opts) { |
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var W = opts.svgWidth || 800; |
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var H = opts.svgHeight || 200; |
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var type = opts.pathType || 'arc'; |
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|
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if (type === 'arc') { |
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var r = opts.arcRadius || 300; |
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var cx = W / 2; |
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var cy = opts.arcDirection === 'bottom' ? H - r - 20 : r + 20; |
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var x1 = cx - r, x2 = cx + r; |
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var sweep = opts.arcDirection === 'bottom' ? 0 : 1; |
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return 'M ' + x1 + ' ' + cy + ' A ' + r + ' ' + r + ' 0 0 ' + sweep + ' ' + x2 + ' ' + cy; |
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} |
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|
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if (type === 'wave') { |
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var amp = opts.waveAmplitude || 40; |
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var freq = opts.waveFrequency || 2; |
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var midY = H / 2; |
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var step = W / (freq * 2); |
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var d = 'M 0 ' + midY; |
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for (var i = 0; i < freq * 2; i++) { |
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var cpX = step * (i + 0.5); |
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var cpY = i % 2 === 0 ? midY - amp : midY + amp; |
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var eX = step * (i + 1); |
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var eY = midY; |
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d += ' Q ' + cpX + ' ' + cpY + ' ' + eX + ' ' + eY; |
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} |
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return d; |
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} |
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|
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if (type === 'circle') { |
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var cr = Math.min(W, H) / 2 - 20; |
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var ccx = W / 2, ccy = H / 2; |
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return 'M ' + (ccx - cr) + ' ' + ccy + |
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' A ' + cr + ' ' + cr + ' 0 1 1 ' + (ccx + cr) + ' ' + ccy + |
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' A ' + cr + ' ' + cr + ' 0 1 1 ' + (ccx - cr) + ' ' + ccy; |
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} |
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|
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if (type === 'scurve') { |
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var midX2 = W / 2, sH = H; |
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return 'M 0 ' + (sH * 0.7) + ' C ' + (midX2 * 0.5) + ' ' + (sH * 0.7) + ' ' + (midX2 * 0.5) + ' ' + (sH * 0.3) + ' ' + midX2 + ' ' + (sH * 0.5) + ' S ' + (midX2 + midX2 * 0.5) + ' ' + (sH * 0.8) + ' ' + W + ' ' + (sH * 0.3); |
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} |
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|
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return 'M 0 ' + (H / 2) + ' L ' + W + ' ' + (H / 2); |
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} |
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|
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document.querySelectorAll('.bkbg-tp-app').forEach(function (app) { |
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var opts = {}; |
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try { opts = JSON.parse(app.dataset.opts || '{}'); } catch (e) { } |
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|
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var W = opts.svgWidth || 800; |
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var H = opts.svgHeight || 200; |
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var text = opts.text || ''; |
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var align2 = opts.align2 || 'center'; |
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var sectionBg = opts.sectionBg || ''; |
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|
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if (sectionBg) app.style.background = sectionBg; |
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|
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var pathD = buildPath(opts); |
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var pathId = 'bkbg-tp-path-' + Math.random().toString(36).slice(2, 7); |
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|
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// Create SVG |
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var svg = document.createElementNS(svgNS, 'svg'); |
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svg.setAttribute('viewBox', '0 0 ' + W + ' ' + H); |
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svg.setAttribute('width', '100%'); |
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svg.style.display = 'block'; |
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svg.style.maxWidth = W + 'px'; |
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svg.style.margin = align2 === 'center' ? '0 auto' : align2 === 'right' ? '0 0 0 auto' : '0'; |
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svg.style.overflow = 'visible'; |
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|
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// defs |
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var defs = document.createElementNS(svgNS, 'defs'); |
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var pathDef = document.createElementNS(svgNS, 'path'); |
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pathDef.setAttribute('id', pathId); |
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pathDef.setAttribute('d', pathD); |
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defs.appendChild(pathDef); |
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svg.appendChild(defs); |
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|
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// Optional visible path stroke |
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if (opts.showPath) { |
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var pathVisible = document.createElementNS(svgNS, 'path'); |
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pathVisible.setAttribute('d', pathD); |
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pathVisible.setAttribute('fill', 'none'); |
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pathVisible.setAttribute('stroke', opts.pathStrokeColor || '#e2e8f0'); |
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pathVisible.setAttribute('stroke-width', opts.pathStrokeWidth || 1); |
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svg.appendChild(pathVisible); |
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} |
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|
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// Text |
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var textEl = document.createElementNS(svgNS, 'text'); |
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textEl.setAttribute('fill', opts.textColor || '#0f172a'); |
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|
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var textPath = document.createElementNS(svgNS, 'textPath'); |
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textPath.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href', '#' + pathId); |
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textPath.setAttribute('href', '#' + pathId); |
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textPath.setAttribute('startOffset', (opts.startOffset || 10) + '%'); |
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textPath.setAttribute('textAnchor', opts.textAnchor || 'start'); |
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textPath.textContent = text; |
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|
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// Animation: scroll startOffset |
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var reducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches; |
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if (opts.animate && !reducedMotion) { |
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var anim = document.createElementNS(svgNS, 'animate'); |
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anim.setAttribute('attributeName', 'startOffset'); |
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anim.setAttribute('from', '0%'); |
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anim.setAttribute('to', '100%'); |
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anim.setAttribute('dur', (opts.animateDuration || 12) + 's'); |
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anim.setAttribute('repeatCount', opts.repeatCount || 'indefinite'); |
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anim.setAttribute('calcMode', 'linear'); |
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textPath.appendChild(anim); |
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} |
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|
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textEl.appendChild(textPath); |
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svg.appendChild(textEl); |
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|
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// Wrap the SVG |
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var wrap = document.createElement('div'); |
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wrap.className = 'bkbg-tp-wrap'; |
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wrap.style.textAlign = align2; |
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wrap.appendChild(svg); |
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app.appendChild(wrap); |
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}); |
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})(); |
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|
