Implement sorting options for #665

Preferences.sublime-settings

@@ -40,6 +40,16 @@
 	// Adds <Tab> after list items instead of a single <space>.
 	"mde.list_align_text": false,
 
+	// MarkdownEditing (References):
+	// The sorting method used by the Organize References command.
+	// Should be one of
+	//
+	// 'marker_order': List in order of appearance in document
+	// 'alphabetical': Alphabetical based on reference name, sorting numerals lexagraphically
+	// 'numeric': Alphabetical based on reference name, sorting numeral chunks numerically
+	"mde.ref_organize_sort": "marker_order",
+	"mde.ref_organize_sort_reverse": false,
+
 	// MarkdownEditing:
 	// Automatically switches list bullet when indenting blank list item with <Tab>.
 	"mde.list_indent_auto_switch_bullet": true,

plugins/references.py

@@ -541,9 +541,21 @@ def run(self, edit):
                     flatrefs.append((name, view.substr(line_reg).strip("\n")))
                 sel.add(line_reg)
 
+        sorting_funcs = {
+            "marker_order": lambda x: marker_order[x[0].lower()]
+            if x[0].lower() in marker_order
+            else 9999,
+            "alphabetical": lambda x: x[0].lower(),
+            "numeric": lambda x: [
+                int(p) if p.isnumeric() else p for p in re.split(r"[ _.-]", x[0].lower())
+            ],
+        }
+        settings = view.settings()
+
         flatfns.sort(key=operator.itemgetter(0))
         flatrefs.sort(
-            key=lambda x: marker_order[x[0].lower()] if x[0].lower() in marker_order else 9999
+            key=sorting_funcs[settings.get("mde.ref_organize_sort", "marker_order")],
+            reverse=settings.get("mde.ref_organize_sort_reverse", False),
         )
 
         view.run_command("left_delete")