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node_modules/micromark-factory-space/dev/index.js

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+/**
+ * @import {Effects, State, TokenType} from 'micromark-util-types'
+ */
+
+import {markdownSpace} from 'micromark-util-character'
+
+// To do: implement `spaceOrTab`, `spaceOrTabMinMax`, `spaceOrTabWithOptions`.
+
+/**
+ * Parse spaces and tabs.
+ *
+ * There is no `nok` parameter:
+ *
+ * *   spaces in markdown are often optional, in which case this factory can be
+ *     used and `ok` will be switched to whether spaces were found or not
+ * *   one line ending or space can be detected with `markdownSpace(code)` right
+ *     before using `factorySpace`
+ *
+ * ###### Examples
+ *
+ * Where `␉` represents a tab (plus how much it expands) and `␠` represents a
+ * single space.
+ *
+ * ```markdown
+ * ␉
+ * ␠␠␠␠
+ * ␉␠
+ * ```
+ *
+ * @param {Effects} effects
+ *   Context.
+ * @param {State} ok
+ *   State switched to when successful.
+ * @param {TokenType} type
+ *   Type (`' \t'`).
+ * @param {number | undefined} [max=Infinity]
+ *   Max (exclusive).
+ * @returns {State}
+ *   Start state.
+ */
+export function factorySpace(effects, ok, type, max) {
+  const limit = max ? max - 1 : Number.POSITIVE_INFINITY
+  let size = 0
+
+  return start
+
+  /** @type {State} */
+  function start(code) {
+    if (markdownSpace(code)) {
+      effects.enter(type)
+      return prefix(code)
+    }
+
+    return ok(code)
+  }
+
+  /** @type {State} */
+  function prefix(code) {
+    if (markdownSpace(code) && size++ < limit) {
+      effects.consume(code)
+      return prefix
+    }
+
+    effects.exit(type)
+    return ok(code)
+  }
+}