Fix Parent relative links not working

Fixes #256

changelog.yml

@@ -2,6 +2,7 @@
   draft: true
   bugs:
     - text: "Dark Theme: Render checkboxes in a lighter color"
+    - text: "Fix Relative Parent links not working - #256"
 
 - version: "1.70"
   date: 2020-09-16

lib/utils/link_resolver.dart

@@ -28,18 +28,7 @@ class LinkResolver {
       return resolveWikiLink(wikiLinkTerm);
     }
 
-    var folder = inputNote.parent;
-    var spec = link;
-
-    if (link.startsWith('./')) {
-      spec = link.substring(2);
-    }
-
-    if (spec.contains(p.separator)) {
-      spec = p.normalize(spec);
-    }
-
-    return _getNoteWithSpec(folder, spec);
+    return _getNoteWithSpec(inputNote.parent, link);
   }
 
   Note resolveWikiLink(String term) {
@@ -88,6 +77,13 @@ class LinkResolver {
   }
 
   Note _getNoteWithSpec(NotesFolderFS folder, String spec) {
+    var fullPath = p.normalize(p.join(folder.folderPath, spec));
+    if (!fullPath.startsWith(folder.folderPath)) {
+      folder = folder.rootFolder;
+    }
+
+    spec = fullPath.substring(folder.folderPath.length + 1);
+
     var linkedNote = folder.getNoteWithSpec(spec);
     if (linkedNote != null) {
       return linkedNote;

test/link_resolver_test.dart

@@ -154,6 +154,14 @@ void main() {
     expect(resolvedNote.filePath, p.join(tempDir.path, 'Goat  Sim.md'));
   });
 
+  test('Resolve Parent file', () {
+    var note = rootFolder.getNoteWithSpec('Folder/Water.md');
+    var linkResolver = LinkResolver(note);
+
+    var resolvedNote = linkResolver.resolve('../Hello.md');
+    expect(resolvedNote.filePath, p.join(tempDir.path, 'Hello.md'));
+  });
+
   test('Should resolve Link object', () {
     var note = rootFolder.getNoteWithSpec('Folder/Water.md');
     var linkResolver = LinkResolver(note);