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Diffstat (limited to 'packages/markdown-it-14.1.0/lib/rules_core/smartquotes.mjs')
| -rw-r--r-- | packages/markdown-it-14.1.0/lib/rules_core/smartquotes.mjs | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/packages/markdown-it-14.1.0/lib/rules_core/smartquotes.mjs b/packages/markdown-it-14.1.0/lib/rules_core/smartquotes.mjs new file mode 100644 index 0000000..3b990ed --- /dev/null +++ b/packages/markdown-it-14.1.0/lib/rules_core/smartquotes.mjs @@ -0,0 +1,193 @@ +// Convert straight quotation marks to typographic ones +// + +import { isWhiteSpace, isPunctChar, isMdAsciiPunct } from '../common/utils.mjs' + +const QUOTE_TEST_RE = /['"]/ +const QUOTE_RE = /['"]/g +const APOSTROPHE = '\u2019' /* ’ */ + +function replaceAt (str, index, ch) { + return str.slice(0, index) + ch + str.slice(index + 1) +} + +function process_inlines (tokens, state) { + let j + + const stack = [] + + for (let i = 0; i < tokens.length; i++) { + const token = tokens[i] + + const thisLevel = tokens[i].level + + for (j = stack.length - 1; j >= 0; j--) { + if (stack[j].level <= thisLevel) { break } + } + stack.length = j + 1 + + if (token.type !== 'text') { continue } + + let text = token.content + let pos = 0 + let max = text.length + + /* eslint no-labels:0,block-scoped-var:0 */ + OUTER: + while (pos < max) { + QUOTE_RE.lastIndex = pos + const t = QUOTE_RE.exec(text) + if (!t) { break } + + let canOpen = true + let canClose = true + pos = t.index + 1 + const isSingle = (t[0] === "'") + + // Find previous character, + // default to space if it's the beginning of the line + // + let lastChar = 0x20 + + if (t.index - 1 >= 0) { + lastChar = text.charCodeAt(t.index - 1) + } else { + for (j = i - 1; j >= 0; j--) { + if (tokens[j].type === 'softbreak' || tokens[j].type === 'hardbreak') break // lastChar defaults to 0x20 + if (!tokens[j].content) continue // should skip all tokens except 'text', 'html_inline' or 'code_inline' + + lastChar = tokens[j].content.charCodeAt(tokens[j].content.length - 1) + break + } + } + + // Find next character, + // default to space if it's the end of the line + // + let nextChar = 0x20 + + if (pos < max) { + nextChar = text.charCodeAt(pos) + } else { + for (j = i + 1; j < tokens.length; j++) { + if (tokens[j].type === 'softbreak' || tokens[j].type === 'hardbreak') break // nextChar defaults to 0x20 + if (!tokens[j].content) continue // should skip all tokens except 'text', 'html_inline' or 'code_inline' + + nextChar = tokens[j].content.charCodeAt(0) + break + } + } + + const isLastPunctChar = isMdAsciiPunct(lastChar) || isPunctChar(String.fromCharCode(lastChar)) + const isNextPunctChar = isMdAsciiPunct(nextChar) || isPunctChar(String.fromCharCode(nextChar)) + + const isLastWhiteSpace = isWhiteSpace(lastChar) + const isNextWhiteSpace = isWhiteSpace(nextChar) + + if (isNextWhiteSpace) { + canOpen = false + } else if (isNextPunctChar) { + if (!(isLastWhiteSpace || isLastPunctChar)) { + canOpen = false + } + } + + if (isLastWhiteSpace) { + canClose = false + } else if (isLastPunctChar) { + if (!(isNextWhiteSpace || isNextPunctChar)) { + canClose = false + } + } + + if (nextChar === 0x22 /* " */ && t[0] === '"') { + if (lastChar >= 0x30 /* 0 */ && lastChar <= 0x39 /* 9 */) { + // special case: 1"" - count first quote as an inch + canClose = canOpen = false + } + } + + if (canOpen && canClose) { + // Replace quotes in the middle of punctuation sequence, but not + // in the middle of the words, i.e.: + // + // 1. foo " bar " baz - not replaced + // 2. foo-"-bar-"-baz - replaced + // 3. foo"bar"baz - not replaced + // + canOpen = isLastPunctChar + canClose = isNextPunctChar + } + + if (!canOpen && !canClose) { + // middle of word + if (isSingle) { + token.content = replaceAt(token.content, t.index, APOSTROPHE) + } + continue + } + + if (canClose) { + // this could be a closing quote, rewind the stack to get a match + for (j = stack.length - 1; j >= 0; j--) { + let item = stack[j] + if (stack[j].level < thisLevel) { break } + if (item.single === isSingle && stack[j].level === thisLevel) { + item = stack[j] + + let openQuote + let closeQuote + if (isSingle) { + openQuote = state.md.options.quotes[2] + closeQuote = state.md.options.quotes[3] + } else { + openQuote = state.md.options.quotes[0] + closeQuote = state.md.options.quotes[1] + } + + // replace token.content *before* tokens[item.token].content, + // because, if they are pointing at the same token, replaceAt + // could mess up indices when quote length != 1 + token.content = replaceAt(token.content, t.index, closeQuote) + tokens[item.token].content = replaceAt( + tokens[item.token].content, item.pos, openQuote) + + pos += closeQuote.length - 1 + if (item.token === i) { pos += openQuote.length - 1 } + + text = token.content + max = text.length + + stack.length = j + continue OUTER + } + } + } + + if (canOpen) { + stack.push({ + token: i, + pos: t.index, + single: isSingle, + level: thisLevel + }) + } else if (canClose && isSingle) { + token.content = replaceAt(token.content, t.index, APOSTROPHE) + } + } + } +} + +export default function smartquotes (state) { + /* eslint max-depth:0 */ + if (!state.md.options.typographer) { return } + + for (let blkIdx = state.tokens.length - 1; blkIdx >= 0; blkIdx--) { + if (state.tokens[blkIdx].type !== 'inline' || + !QUOTE_TEST_RE.test(state.tokens[blkIdx].content)) { + continue + } + + process_inlines(state.tokens[blkIdx].children, state) + } +} |