add symbol to shared notes in the tree

src/public/app/entities/note_short.js

@@ -778,6 +778,26 @@ class NoteShort {
             throw new Error(`Unrecognized env type ${env} for note ${this.noteId}`);
         }
     }
+
+    isShared() {
+        for (const parentNoteId of this.parents) {
+            if (parentNoteId === 'root' || parentNoteId === 'none') {
+                continue;
+            }
+
+            const parentNote = froca.notes[parentNoteId];
+
+            if (!parentNote) {
+                continue;
+            }
+
+            if (parentNote.noteId === 'share' || parentNote.isShared()) {
+                return true;
+            }
+        }
+
+        return false;
+    }
 }
 
 export default NoteShort;

src/public/app/widgets/note_tree.js

@@ -661,7 +661,10 @@ export default class NoteTreeWidget extends NoteContextAwareWidget {
             extraClasses.push("protected");
         }
 
-        if (note.getParentNoteIds().length > 1) {
+        if (note.isShared()) {
+            extraClasses.push("shared");
+        }
+        else if (note.getParentNoteIds().length > 1) {
             const notSearchParents = note.getParentNoteIds()
                 .map(noteId => froca.notes[noteId])
                 .filter(note => !!note)

src/public/app/widgets/shared_info.js

@@ -50,5 +50,8 @@ export default class SharedInfoWidget extends NoteContextAwareWidget {
         if (loadResults.getAttributes().find(attr => attr.name.startsWith("share") && attributeService.isAffecting(attr, this.note))) {
             this.refresh();
         }
+        else if (loadResults.getBranches().find(branch => branch.noteId === this.noteId)) {
+            this.refresh();
+        }
     }
 }

src/public/stylesheets/tree.css

@@ -135,7 +135,11 @@ span.fancytree-node.protected > span.fancytree-custom-icon {
 }
 
 span.fancytree-node.multiple-parents .fancytree-title::after {
-    content: " *"
+    content: " *";
+}
+
+span.fancytree-node.shared .fancytree-title::after {
+    content: " \2197";
 }
 
 span.fancytree-node.fancytree-active-clone:not(.fancytree-active) .fancytree-title {