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Diffstat (limited to 'packages/markdown-it-14.1.0/lib/rules_block/reference.mjs')
| -rw-r--r-- | packages/markdown-it-14.1.0/lib/rules_block/reference.mjs | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/packages/markdown-it-14.1.0/lib/rules_block/reference.mjs b/packages/markdown-it-14.1.0/lib/rules_block/reference.mjs new file mode 100644 index 0000000..4166286 --- /dev/null +++ b/packages/markdown-it-14.1.0/lib/rules_block/reference.mjs @@ -0,0 +1,212 @@ +import { isSpace, normalizeReference } from '../common/utils.mjs' + +export default function reference (state, startLine, _endLine, silent) { + let pos = state.bMarks[startLine] + state.tShift[startLine] + let max = state.eMarks[startLine] + let nextLine = startLine + 1 + + // if it's indented more than 3 spaces, it should be a code block + if (state.sCount[startLine] - state.blkIndent >= 4) { return false } + + if (state.src.charCodeAt(pos) !== 0x5B/* [ */) { return false } + + function getNextLine (nextLine) { + const endLine = state.lineMax + + if (nextLine >= endLine || state.isEmpty(nextLine)) { + // empty line or end of input + return null + } + + let isContinuation = false + + // this would be a code block normally, but after paragraph + // it's considered a lazy continuation regardless of what's there + if (state.sCount[nextLine] - state.blkIndent > 3) { isContinuation = true } + + // quirk for blockquotes, this line should already be checked by that rule + if (state.sCount[nextLine] < 0) { isContinuation = true } + + if (!isContinuation) { + const terminatorRules = state.md.block.ruler.getRules('reference') + const oldParentType = state.parentType + state.parentType = 'reference' + + // Some tags can terminate paragraph without empty line. + let terminate = false + for (let i = 0, l = terminatorRules.length; i < l; i++) { + if (terminatorRules[i](state, nextLine, endLine, true)) { + terminate = true + break + } + } + + state.parentType = oldParentType + if (terminate) { + // terminated by another block + return null + } + } + + const pos = state.bMarks[nextLine] + state.tShift[nextLine] + const max = state.eMarks[nextLine] + + // max + 1 explicitly includes the newline + return state.src.slice(pos, max + 1) + } + + let str = state.src.slice(pos, max + 1) + + max = str.length + let labelEnd = -1 + + for (pos = 1; pos < max; pos++) { + const ch = str.charCodeAt(pos) + if (ch === 0x5B /* [ */) { + return false + } else if (ch === 0x5D /* ] */) { + labelEnd = pos + break + } else if (ch === 0x0A /* \n */) { + const lineContent = getNextLine(nextLine) + if (lineContent !== null) { + str += lineContent + max = str.length + nextLine++ + } + } else if (ch === 0x5C /* \ */) { + pos++ + if (pos < max && str.charCodeAt(pos) === 0x0A) { + const lineContent = getNextLine(nextLine) + if (lineContent !== null) { + str += lineContent + max = str.length + nextLine++ + } + } + } + } + + if (labelEnd < 0 || str.charCodeAt(labelEnd + 1) !== 0x3A/* : */) { return false } + + // [label]: destination 'title' + // ^^^ skip optional whitespace here + for (pos = labelEnd + 2; pos < max; pos++) { + const ch = str.charCodeAt(pos) + if (ch === 0x0A) { + const lineContent = getNextLine(nextLine) + if (lineContent !== null) { + str += lineContent + max = str.length + nextLine++ + } + } else if (isSpace(ch)) { + /* eslint no-empty:0 */ + } else { + break + } + } + + // [label]: destination 'title' + // ^^^^^^^^^^^ parse this + const destRes = state.md.helpers.parseLinkDestination(str, pos, max) + if (!destRes.ok) { return false } + + const href = state.md.normalizeLink(destRes.str) + if (!state.md.validateLink(href)) { return false } + + pos = destRes.pos + + // save cursor state, we could require to rollback later + const destEndPos = pos + const destEndLineNo = nextLine + + // [label]: destination 'title' + // ^^^ skipping those spaces + const start = pos + for (; pos < max; pos++) { + const ch = str.charCodeAt(pos) + if (ch === 0x0A) { + const lineContent = getNextLine(nextLine) + if (lineContent !== null) { + str += lineContent + max = str.length + nextLine++ + } + } else if (isSpace(ch)) { + /* eslint no-empty:0 */ + } else { + break + } + } + + // [label]: destination 'title' + // ^^^^^^^ parse this + let titleRes = state.md.helpers.parseLinkTitle(str, pos, max) + while (titleRes.can_continue) { + const lineContent = getNextLine(nextLine) + if (lineContent === null) break + str += lineContent + pos = max + max = str.length + nextLine++ + titleRes = state.md.helpers.parseLinkTitle(str, pos, max, titleRes) + } + let title + + if (pos < max && start !== pos && titleRes.ok) { + title = titleRes.str + pos = titleRes.pos + } else { + title = '' + pos = destEndPos + nextLine = destEndLineNo + } + + // skip trailing spaces until the rest of the line + while (pos < max) { + const ch = str.charCodeAt(pos) + if (!isSpace(ch)) { break } + pos++ + } + + if (pos < max && str.charCodeAt(pos) !== 0x0A) { + if (title) { + // garbage at the end of the line after title, + // but it could still be a valid reference if we roll back + title = '' + pos = destEndPos + nextLine = destEndLineNo + while (pos < max) { + const ch = str.charCodeAt(pos) + if (!isSpace(ch)) { break } + pos++ + } + } + } + + if (pos < max && str.charCodeAt(pos) !== 0x0A) { + // garbage at the end of the line + return false + } + + const label = normalizeReference(str.slice(1, labelEnd)) + if (!label) { + // CommonMark 0.20 disallows empty labels + return false + } + + // Reference can not terminate anything. This check is for safety only. + /* istanbul ignore if */ + if (silent) { return true } + + if (typeof state.env.references === 'undefined') { + state.env.references = {} + } + if (typeof state.env.references[label] === 'undefined') { + state.env.references[label] = { title, href } + } + + state.line = nextLine + return true +} |