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Tone mark positioning polyfill
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| <!DOCTYPE html> | |
| <html lang="zh-TW"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Polyfill demo for tone mark positioning</title> | |
| <style> | |
| body { | |
| -webkit-writing-mode: vertical-rl; | |
| -ms-writing-mode: tb-rl; | |
| writing-mode: vertical-rl; | |
| line-height: 5; | |
| font-size: 52px; | |
| } | |
| rt { | |
| font-size: 30%; | |
| line-height: 1; | |
| text-align: center; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <ruby>認<rt>ㄖㄣˋ</rt>得<rt>ㄉㄜˊ</rt>幾<rt>ㄐㄧˇ</rt>個<rt>ㄍㄜˋ</rt>字<rt>ㄗˋ</rt></ruby> | |
| <script> | |
| function iterateTextNodes(node, callback) { | |
| var childList = node.childNodes; | |
| for (var i = 0; i < childList.length; i++) { | |
| var child = childList[i]; | |
| if (child.nodeType == Node.ELEMENT_NODE) { | |
| iterateTextNodes(child, callback); | |
| } else if (child.nodeType == Node.TEXT_NODE) { | |
| callback(child); | |
| } | |
| } | |
| } | |
| function $c(tag) { return document.createElement(tag); } | |
| function $t(text) { return document.createTextNode(text); } | |
| function positionToneMark(textNode) { | |
| var text = textNode.textContent; | |
| var pieces = text.split(/([\u02c9\u02ca\u02c7\u02cb])/); | |
| if (pieces.length <= 1) { | |
| return; | |
| } | |
| var outer = $c('span'); | |
| for (var i = 0; i < pieces.length - 1; i += 2) { | |
| var toneMarkElem; | |
| if (!pieces[i]) { | |
| outer.appendChild($t(pieces[i + 1])); | |
| } else { | |
| outer.appendChild($t(pieces[i].slice(0, -1))); | |
| var wrapper = $c('span'); | |
| wrapper.appendChild($t(pieces[i].slice(-1))); | |
| wrapper.style.webkitWritingMode = 'horizontal-tb'; | |
| wrapper.style.writingMode = 'lr-tb'; | |
| wrapper.style.writingMode = 'horizontal-tb'; | |
| wrapper.style.position = 'relative'; | |
| var mark = $c('span'); | |
| mark.appendChild($t(pieces[i + 1])); | |
| mark.style.position = 'absolute'; | |
| wrapper.appendChild(mark); | |
| outer.appendChild(wrapper); | |
| } | |
| } | |
| outer.appendChild($t(pieces.pop())); | |
| textNode.parentNode.replaceChild(outer, textNode); | |
| } | |
| var rtList = document.getElementsByTagName('rt'); | |
| for (var i = 0; i < rtList.length; i++) { | |
| iterateTextNodes(rtList[i], function (textNode) { | |
| positionToneMark(textNode); | |
| }); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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