130 lines
3.6 KiB
JavaScript
130 lines
3.6 KiB
JavaScript
function parse(xstr, options) {
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let {onStartNode, onEndNode, onTextNode, onCdata, onComment, innerCut} = options;
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if (!onStartNode)
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onStartNode = () => {};
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if (!onEndNode)
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onEndNode = () => {};
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if (!onTextNode)
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onTextNode = () => {};
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if (!onCdata)
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onCdata = () => {};
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if (!onComment)
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onComment = () => {};
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if (!innerCut)
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innerCut = new Set();
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let i = 0;
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const len = xstr.length;
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let cutCounter = 0;
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let cutTag = '';
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let inCdata;
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let inComment;
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while (i < len) {
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inCdata = false;
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inComment = false;
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let left = xstr.indexOf('<', i);
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if (left < 0)
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break;
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let leftData = left;
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if (left < len - 2 && xstr[left + 1] == '!') {
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if (xstr[left + 2] == '-') {
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const leftComment = xstr.indexOf('<!--', left);
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if (leftComment == left) {
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inComment = true;
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leftData = left + 3;
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}
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}
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if (!inComment && xstr[left + 2] == '[') {
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const leftCdata = xstr.indexOf('<![CDATA[', left);
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if (leftCdata == left) {
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inCdata = true;
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leftData = left + 8;
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}
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}
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}
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let right = null;
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let rightData = null;
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if (inCdata) {
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rightData = xstr.indexOf(']]>', leftData + 1);
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if (rightData < 0)
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break;
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right = rightData + 2;
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} else if (inComment) {
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rightData = xstr.indexOf('-->', leftData + 1);
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if (rightData < 0)
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break;
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right = rightData + 2;
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} else {
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rightData = xstr.indexOf('>', leftData + 1);
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if (rightData < 0)
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break;
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right = rightData;
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}
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let tagData = xstr.substr(leftData + 1, rightData - leftData - 1);
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if (inCdata) {
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onCdata(tagData, left, cutCounter, cutTag);
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} else if (inComment) {
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onComment(tagData, left, cutCounter, cutTag);
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} else {
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let tag = '';
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let tail = '';
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const firstSpace = tagData.indexOf(' ');
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if (firstSpace >= 0) {
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tail = tagData.substr(firstSpace);
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tag = tagData.substr(0, firstSpace);
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} else {
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tag = tagData;
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}
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tag = tag.toLowerCase();
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const text = xstr.substr(i, left - i);
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onTextNode(text, left, cutCounter, cutTag);
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let endTag = '';
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if (tag === '' || tag[0] !== '/') {
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onStartNode(tag, tail, left, cutCounter, cutTag);
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} else {
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endTag = tag.substr(1);
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onEndNode(endTag, tail, left, cutCounter, cutTag);
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}
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if (innerCut.has(tag) && (!cutCounter || cutTag === tag)) {
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if (!cutCounter)
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cutTag = tag;
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cutCounter++;
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}
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if (cutTag === endTag) {
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cutCounter = (cutCounter > 0 ? cutCounter - 1 : 0);
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if (!cutCounter)
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cutTag = '';
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}
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}
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i = right + 1;
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}
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if (i < len) {
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if (inCdata) {
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onCdata(xstr.substr(i, len - i), len - 1, cutCounter, cutTag);
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} else if (inComment) {
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onComment(xstr.substr(i, len - i), len - 1, cutCounter, cutTag);
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} else {
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onTextNode(xstr.substr(i, len - i), len - 1, cutCounter, cutTag);
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}
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}
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}
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module.exports = {
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parse
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} |