345 lines
7.6 KiB
JavaScript
345 lines
7.6 KiB
JavaScript
let isWhiteSpace;
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function trailingSpaceOnly(src, start, max) {
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let i;
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for(i=start;i<max;i++) {
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let code = src.charCodeAt(i);
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if (code === 0x0A) { return true; }
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if (!isWhiteSpace(code)) { return false; }
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}
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return true;
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}
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const ATTR_REGEX = /^\s*=(.+)$|((([a-z0-9]*)\s*)=)(["“”'].*["“”']|\S+)/ig;
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// parse a tag [test a=1 b=2] to a data structure
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// {tag: "test", attrs={a: "1", b: "2"}
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export function parseBBCodeTag(src, start, max, multiline) {
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let i;
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let tag;
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let attrs = {};
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let closed = false;
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let length = 0;
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let closingTag = false;
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// closing tag
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if (src.charCodeAt(start+1) === 47) {
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closingTag = true;
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start += 1;
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}
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for (i=start+1;i<max;i++) {
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let letter = src[i];
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if (!( (letter >= 'a' && letter <= 'z') ||
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(letter >= 'A' && letter <= 'Z'))) {
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break;
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}
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}
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tag = src.slice(start+1, i);
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if (!tag) {
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return;
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}
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if (closingTag) {
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if (src[i] === ']') {
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if (multiline && !trailingSpaceOnly(src, i+1, max)) {
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return;
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}
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tag = tag.toLowerCase();
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return {tag, length: tag.length+3, closing: true};
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}
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return;
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}
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for (;i<max;i++) {
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let letter = src[i];
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if (letter === ']') {
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closed = true;
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break;
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}
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}
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if (closed) {
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length = (i-start)+1;
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let raw = src.slice(start+tag.length+1, i);
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// trivial parser that is going to have to be rewritten at some point
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if (raw) {
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let match, key, val;
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while(match = ATTR_REGEX.exec(raw)) {
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if (match[1]) {
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key = '_default';
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} else {
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key = match[4];
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}
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val = match[1] || match[5];
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if (val) {
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val = val.trim();
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val = val.replace(/^["'“”](.*)["'“”]$/, '$1');
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attrs[key] = val;
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}
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}
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}
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if (multiline && !trailingSpaceOnly(src, start+length, max)) {
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return;
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}
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tag = tag.toLowerCase();
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return {tag, attrs, length};
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}
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}
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function findBlockCloseTag(state, openTag, startLine, endLine) {
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let nesting = 0,
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line = startLine-1,
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start,
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closeTag,
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max;
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for (;;) {
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line++;
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if (line >= endLine) {
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// unclosed bbcode block should not be autoclosed by end of document.
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return;
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}
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start = state.bMarks[line] + state.tShift[line];
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max = state.eMarks[line];
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if (start < max && state.sCount[line] < state.blkIndent) {
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// non-empty line with negative indent should stop the list:
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// - ```
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// test
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break;
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}
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// bbcode close [ === 91
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if (91 !== state.src.charCodeAt(start)) { continue; }
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if (state.sCount[line] - state.blkIndent >= 4) {
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// closing bbcode less than 4 spaces
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continue;
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}
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closeTag = parseBBCodeTag(state.src, start, max, true);
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if (closeTag && closeTag.closing && closeTag.tag === openTag.tag) {
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if (nesting === 0) {
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closeTag.line = line;
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closeTag.block = true;
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break;
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}
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nesting--;
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}
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if (closeTag && !closeTag.closing && closeTag.tag === openTag.tag) {
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nesting++;
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}
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closeTag = null;
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}
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return closeTag;
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}
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function findInlineCloseTag(state, openTag, start, max) {
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let closeTag;
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let possibleTag = false;
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for(let j=max-1;j>start;j--){
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if (!possibleTag) {
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if (state.src.charCodeAt(j) === 93 /* ] */) {
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possibleTag = true;
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continue;
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}
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if(!isWhiteSpace(state.src.charCodeAt(j))) {
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break;
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}
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} else {
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if (state.src.charCodeAt(j) === 91 /* [ */) {
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closeTag = parseBBCodeTag(state.src, j, max);
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if (!closeTag || closeTag.tag !== openTag.tag || !closeTag.closing) {
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closeTag = null;
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} else {
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closeTag.start = j;
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break;
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}
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}
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}
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}
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return closeTag;
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}
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function applyBBCode(state, startLine, endLine, silent, md) {
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var nextLine,
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oldParent, oldLineMax, rule,
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start = state.bMarks[startLine] + state.tShift[startLine],
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initial = start,
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max = state.eMarks[startLine];
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// [ === 91
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if (91 !== state.src.charCodeAt(start)) { return false; }
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let info = parseBBCodeTag(state.src, start, max);
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if (!info || info.closing) {
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return false;
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}
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let ruleInfo = md.block.bbcode.ruler.getRuleForTag(info.tag);
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if (!ruleInfo) { return false; }
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rule = ruleInfo.rule;
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// Since start is found, we can report success here in validation mode
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if (silent) { return true; }
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// Search for the end of the block
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nextLine = startLine;
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// We might have a single inline bbcode
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let closeTag = findInlineCloseTag(state, info, start + info.length, max);
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if (!closeTag) {
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if (!trailingSpaceOnly(state.src, start + info.length, max)) {
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return false;
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}
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closeTag = findBlockCloseTag(state, info, nextLine+1, endLine);
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}
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if (!closeTag) {
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return false;
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}
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nextLine = closeTag.line || startLine;
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oldParent = state.parentType;
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oldLineMax = state.lineMax;
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// this will prevent lazy continuations from ever going past our end marker
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// which can happen if we are parsing a bbcode block
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state.lineMax = nextLine;
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if (rule.replace) {
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let content;
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if (startLine === nextLine) {
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content = state.src.slice(start + info.length, closeTag.start);
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} else {
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content = state.src.slice(state.bMarks[startLine+1], state.eMarks[nextLine-1]);
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}
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if (!rule.replace.call(this, state, info, content)) {
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return false;
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}
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} else {
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if (rule.before) {
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rule.before.call(this, state, info, state.src.slice(initial, initial + info.length + 1));
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}
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let wrapTag;
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if (rule.wrap) {
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let token;
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if (typeof rule.wrap === 'function') {
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token = new state.Token('wrap_bbcode', 'div', 1);
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token.level = state.level+1;
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if (!rule.wrap(token, info)) {
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return false;
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}
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state.tokens.push(token);
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state.level = token.level;
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wrapTag = token.tag;
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} else {
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let split = rule.wrap.split('.');
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wrapTag = split[0];
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let className = split.slice(1).join(' ');
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token = state.push('wrap_bbcode', wrapTag, 1);
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if (className) {
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token.attrs = [['class', className]];
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}
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}
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}
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let lastToken = state.tokens[state.tokens.length-1];
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lastToken.map = [ startLine, nextLine ];
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if (closeTag.block) {
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state.md.block.tokenize(state, startLine + 1, nextLine);
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} else {
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let token = state.push('paragraph_open', 'p', 1);
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token.map = [startLine, startLine];
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token = state.push('inline', '', 0);
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token.children = [];
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token.map = [startLine, startLine];
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token.content = state.src.slice(start + info.length, closeTag.start);
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state.push('paragraph_close', 'p', -1);
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}
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if (rule.wrap) {
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state.push('wrap_bbcode', wrapTag, -1);
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}
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if (rule.after) {
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rule.after.call(this, state, lastToken, state.src.slice(start-2, start + closeTag.length - 1));
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}
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}
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state.parentType = oldParent;
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state.lineMax = oldLineMax;
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state.line = nextLine+1;
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return true;
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}
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export function setup(helper) {
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helper.registerPlugin(md => {
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const ruler = md.block.bbcode.ruler;
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ruler.push('code', {
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tag: 'code',
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replace: function(state, tagInfo, content) {
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let token;
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token = state.push('fence', 'code', 0);
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token.content = content;
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return true;
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}
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});
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isWhiteSpace = md.utils.isWhiteSpace;
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md.block.ruler.after('fence', 'bbcode', (state, startLine, endLine, silent)=> {
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return applyBBCode(state, startLine, endLine, silent, md);
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}, { alt: ['paragraph', 'reference', 'blockquote', 'list'] });
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});
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}
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