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authoraltaf-creator <dev@altafcreator.com>2024-05-12 12:14:02 +0700
committeraltaf-creator <dev@altafcreator.com>2024-05-12 12:14:02 +0700
commitd607ac12097afb5cb6f398a4e7b5cf4316efedc6 (patch)
tree6f4bc5b98a6ff3a1c3189f7ef9b570c0481e100d /packages/markdown-it-14.1.0/lib/parser_inline.mjs
parent7441f212967256ac4c9a93ba0b1f026308a8bfb6 (diff)
self host
Diffstat (limited to 'packages/markdown-it-14.1.0/lib/parser_inline.mjs')
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+/** internal
+ * class ParserInline
+ *
+ * Tokenizes paragraph content.
+ **/
+
+import Ruler from './ruler.mjs'
+import StateInline from './rules_inline/state_inline.mjs'
+
+import r_text from './rules_inline/text.mjs'
+import r_linkify from './rules_inline/linkify.mjs'
+import r_newline from './rules_inline/newline.mjs'
+import r_escape from './rules_inline/escape.mjs'
+import r_backticks from './rules_inline/backticks.mjs'
+import r_strikethrough from './rules_inline/strikethrough.mjs'
+import r_emphasis from './rules_inline/emphasis.mjs'
+import r_link from './rules_inline/link.mjs'
+import r_image from './rules_inline/image.mjs'
+import r_autolink from './rules_inline/autolink.mjs'
+import r_html_inline from './rules_inline/html_inline.mjs'
+import r_entity from './rules_inline/entity.mjs'
+
+import r_balance_pairs from './rules_inline/balance_pairs.mjs'
+import r_fragments_join from './rules_inline/fragments_join.mjs'
+
+// Parser rules
+
+const _rules = [
+ ['text', r_text],
+ ['linkify', r_linkify],
+ ['newline', r_newline],
+ ['escape', r_escape],
+ ['backticks', r_backticks],
+ ['strikethrough', r_strikethrough.tokenize],
+ ['emphasis', r_emphasis.tokenize],
+ ['link', r_link],
+ ['image', r_image],
+ ['autolink', r_autolink],
+ ['html_inline', r_html_inline],
+ ['entity', r_entity]
+]
+
+// `rule2` ruleset was created specifically for emphasis/strikethrough
+// post-processing and may be changed in the future.
+//
+// Don't use this for anything except pairs (plugins working with `balance_pairs`).
+//
+const _rules2 = [
+ ['balance_pairs', r_balance_pairs],
+ ['strikethrough', r_strikethrough.postProcess],
+ ['emphasis', r_emphasis.postProcess],
+ // rules for pairs separate '**' into its own text tokens, which may be left unused,
+ // rule below merges unused segments back with the rest of the text
+ ['fragments_join', r_fragments_join]
+]
+
+/**
+ * new ParserInline()
+ **/
+function ParserInline () {
+ /**
+ * ParserInline#ruler -> Ruler
+ *
+ * [[Ruler]] instance. Keep configuration of inline rules.
+ **/
+ this.ruler = new Ruler()
+
+ for (let i = 0; i < _rules.length; i++) {
+ this.ruler.push(_rules[i][0], _rules[i][1])
+ }
+
+ /**
+ * ParserInline#ruler2 -> Ruler
+ *
+ * [[Ruler]] instance. Second ruler used for post-processing
+ * (e.g. in emphasis-like rules).
+ **/
+ this.ruler2 = new Ruler()
+
+ for (let i = 0; i < _rules2.length; i++) {
+ this.ruler2.push(_rules2[i][0], _rules2[i][1])
+ }
+}
+
+// Skip single token by running all rules in validation mode;
+// returns `true` if any rule reported success
+//
+ParserInline.prototype.skipToken = function (state) {
+ const pos = state.pos
+ const rules = this.ruler.getRules('')
+ const len = rules.length
+ const maxNesting = state.md.options.maxNesting
+ const cache = state.cache
+
+ if (typeof cache[pos] !== 'undefined') {
+ state.pos = cache[pos]
+ return
+ }
+
+ let ok = false
+
+ if (state.level < maxNesting) {
+ for (let i = 0; i < len; i++) {
+ // Increment state.level and decrement it later to limit recursion.
+ // It's harmless to do here, because no tokens are created. But ideally,
+ // we'd need a separate private state variable for this purpose.
+ //
+ state.level++
+ ok = rules[i](state, true)
+ state.level--
+
+ if (ok) {
+ if (pos >= state.pos) { throw new Error("inline rule didn't increment state.pos") }
+ break
+ }
+ }
+ } else {
+ // Too much nesting, just skip until the end of the paragraph.
+ //
+ // NOTE: this will cause links to behave incorrectly in the following case,
+ // when an amount of `[` is exactly equal to `maxNesting + 1`:
+ //
+ // [[[[[[[[[[[[[[[[[[[[[foo]()
+ //
+ // TODO: remove this workaround when CM standard will allow nested links
+ // (we can replace it by preventing links from being parsed in
+ // validation mode)
+ //
+ state.pos = state.posMax
+ }
+
+ if (!ok) { state.pos++ }
+ cache[pos] = state.pos
+}
+
+// Generate tokens for input range
+//
+ParserInline.prototype.tokenize = function (state) {
+ const rules = this.ruler.getRules('')
+ const len = rules.length
+ const end = state.posMax
+ const maxNesting = state.md.options.maxNesting
+
+ while (state.pos < end) {
+ // Try all possible rules.
+ // On success, rule should:
+ //
+ // - update `state.pos`
+ // - update `state.tokens`
+ // - return true
+ const prevPos = state.pos
+ let ok = false
+
+ if (state.level < maxNesting) {
+ for (let i = 0; i < len; i++) {
+ ok = rules[i](state, false)
+ if (ok) {
+ if (prevPos >= state.pos) { throw new Error("inline rule didn't increment state.pos") }
+ break
+ }
+ }
+ }
+
+ if (ok) {
+ if (state.pos >= end) { break }
+ continue
+ }
+
+ state.pending += state.src[state.pos++]
+ }
+
+ if (state.pending) {
+ state.pushPending()
+ }
+}
+
+/**
+ * ParserInline.parse(str, md, env, outTokens)
+ *
+ * Process input string and push inline tokens into `outTokens`
+ **/
+ParserInline.prototype.parse = function (str, md, env, outTokens) {
+ const state = new this.State(str, md, env, outTokens)
+
+ this.tokenize(state)
+
+ const rules = this.ruler2.getRules('')
+ const len = rules.length
+
+ for (let i = 0; i < len; i++) {
+ rules[i](state)
+ }
+}
+
+ParserInline.prototype.State = StateInline
+
+export default ParserInline