Refactor routing in App component to enhance navigation and improve error handling by integrating dynamic routes and updating the NotFound route.

node_modules/micromark-core-commonmark/lib/setext-underline.js

@@ -0,0 +1,185 @@
+/**
+ * @import {
+ *   Code,
+ *   Construct,
+ *   Resolver,
+ *   State,
+ *   TokenizeContext,
+ *   Tokenizer
+ * } from 'micromark-util-types'
+ */
+
+import { factorySpace } from 'micromark-factory-space';
+import { markdownLineEnding, markdownSpace } from 'micromark-util-character';
+/** @type {Construct} */
+export const setextUnderline = {
+  name: 'setextUnderline',
+  resolveTo: resolveToSetextUnderline,
+  tokenize: tokenizeSetextUnderline
+};
+
+/** @type {Resolver} */
+function resolveToSetextUnderline(events, context) {
+  // To do: resolve like `markdown-rs`.
+  let index = events.length;
+  /** @type {number | undefined} */
+  let content;
+  /** @type {number | undefined} */
+  let text;
+  /** @type {number | undefined} */
+  let definition;
+
+  // Find the opening of the content.
+  // It’ll always exist: we don’t tokenize if it isn’t there.
+  while (index--) {
+    if (events[index][0] === 'enter') {
+      if (events[index][1].type === "content") {
+        content = index;
+        break;
+      }
+      if (events[index][1].type === "paragraph") {
+        text = index;
+      }
+    }
+    // Exit
+    else {
+      if (events[index][1].type === "content") {
+        // Remove the content end (if needed we’ll add it later)
+        events.splice(index, 1);
+      }
+      if (!definition && events[index][1].type === "definition") {
+        definition = index;
+      }
+    }
+  }
+  const heading = {
+    type: "setextHeading",
+    start: {
+      ...events[content][1].start
+    },
+    end: {
+      ...events[events.length - 1][1].end
+    }
+  };
+
+  // Change the paragraph to setext heading text.
+  events[text][1].type = "setextHeadingText";
+
+  // If we have definitions in the content, we’ll keep on having content,
+  // but we need move it.
+  if (definition) {
+    events.splice(text, 0, ['enter', heading, context]);
+    events.splice(definition + 1, 0, ['exit', events[content][1], context]);
+    events[content][1].end = {
+      ...events[definition][1].end
+    };
+  } else {
+    events[content][1] = heading;
+  }
+
+  // Add the heading exit at the end.
+  events.push(['exit', heading, context]);
+  return events;
+}
+
+/**
+ * @this {TokenizeContext}
+ *   Context.
+ * @type {Tokenizer}
+ */
+function tokenizeSetextUnderline(effects, ok, nok) {
+  const self = this;
+  /** @type {NonNullable<Code>} */
+  let marker;
+  return start;
+
+  /**
+   * At start of heading (setext) underline.
+   *
+   * ```markdown
+   *   | aa
+   * > | ==
+   *     ^
+   * ```
+   *
+   * @type {State}
+   */
+  function start(code) {
+    let index = self.events.length;
+    /** @type {boolean | undefined} */
+    let paragraph;
+    // Find an opening.
+    while (index--) {
+      // Skip enter/exit of line ending, line prefix, and content.
+      // We can now either have a definition or a paragraph.
+      if (self.events[index][1].type !== "lineEnding" && self.events[index][1].type !== "linePrefix" && self.events[index][1].type !== "content") {
+        paragraph = self.events[index][1].type === "paragraph";
+        break;
+      }
+    }
+
+    // To do: handle lazy/pierce like `markdown-rs`.
+    // To do: parse indent like `markdown-rs`.
+    if (!self.parser.lazy[self.now().line] && (self.interrupt || paragraph)) {
+      effects.enter("setextHeadingLine");
+      marker = code;
+      return before(code);
+    }
+    return nok(code);
+  }
+
+  /**
+   * After optional whitespace, at `-` or `=`.
+   *
+   * ```markdown
+   *   | aa
+   * > | ==
+   *     ^
+   * ```
+   *
+   * @type {State}
+   */
+  function before(code) {
+    effects.enter("setextHeadingLineSequence");
+    return inside(code);
+  }
+
+  /**
+   * In sequence.
+   *
+   * ```markdown
+   *   | aa
+   * > | ==
+   *     ^
+   * ```
+   *
+   * @type {State}
+   */
+  function inside(code) {
+    if (code === marker) {
+      effects.consume(code);
+      return inside;
+    }
+    effects.exit("setextHeadingLineSequence");
+    return markdownSpace(code) ? factorySpace(effects, after, "lineSuffix")(code) : after(code);
+  }
+
+  /**
+   * After sequence, after optional whitespace.
+   *
+   * ```markdown
+   *   | aa
+   * > | ==
+   *       ^
+   * ```
+   *
+   * @type {State}
+   */
+  function after(code) {
+    if (code === null || markdownLineEnding(code)) {
+      effects.exit("setextHeadingLine");
+      return ok(code);
+    }
+    return nok(code);
+  }
+}