Squash Odysseus development history

static/js/documentOutline.js

@@ -0,0 +1,69 @@
+// Pure Markdown outline parsing kept separate from the editor DOM so heading
+// detection can be tested without mounting the full document workspace.
+
+function cleanHeadingLabel(value) {
+  return String(value || '')
+    .replace(/!\[([^\]]*)\]\([^)]*\)/g, '$1')
+    .replace(/\[([^\]]+)\]\([^)]*\)/g, '$1')
+    .replace(/[*_~`]+/g, '')
+    .replace(/\s+/g, ' ')
+    .trim();
+}
+
+export function parseMarkdownOutline(source) {
+  const text = String(source || '').replace(/\r\n?/g, '\n');
+  const lines = text.split('\n');
+  const offsets = [];
+  let offset = 0;
+  for (const line of lines) {
+    offsets.push(offset);
+    offset += line.length + 1;
+  }
+
+  const entries = [];
+  let fence = null;
+  for (let index = 0; index < lines.length; index += 1) {
+    const line = lines[index];
+    const fenceMatch = line.match(/^ {0,3}(`{3,}|~{3,})/);
+    if (fenceMatch) {
+      const marker = fenceMatch[1][0];
+      if (!fence) fence = marker;
+      else if (fence === marker) fence = null;
+      continue;
+    }
+    if (fence) continue;
+
+    const atx = line.match(/^ {0,3}(#{1,6})[\t ]+(.+?)\s*$/);
+    if (atx) {
+      const rawLabel = atx[2].replace(/[\t ]+#+[\t ]*$/, '');
+      const label = cleanHeadingLabel(rawLabel);
+      if (label) {
+        entries.push({
+          level: atx[1].length,
+          text: label,
+          start: offsets[index],
+          end: offsets[index] + line.length,
+          line: index,
+        });
+      }
+      continue;
+    }
+
+    const setext = line.match(/^ {0,3}(=+|-+)[\t ]*$/);
+    if (setext && index > 0) {
+      const previous = lines[index - 1];
+      const label = cleanHeadingLabel(previous.trim());
+      if (label && !/^ {0,3}(?:[-*_][\t ]*){3,}$/.test(previous)) {
+        entries.push({
+          level: setext[1][0] === '=' ? 1 : 2,
+          text: label,
+          start: offsets[index - 1],
+          end: offsets[index - 1] + previous.length,
+          line: index - 1,
+        });
+      }
+    }
+  }
+  return entries;
+}
+