feat: make tags sticky and allow manual removal

README.md

@@ -107,7 +107,8 @@ Dots can be repeated to move to parent tasks.
 
 Property Filters:
 
-- `#TAG` - filter by tag
+- `+TAG` - filter by tag
+- `-TAG` - remove filter by tag
 - `?STATE` - filter by state (type or description) - plain `?` to reset
 
 State descriptions can be used for example for Kanban columns or review flows.

src/main.rs

@@ -337,9 +337,13 @@ async fn main() {
                         }
                     },
 
-                    Some('#') => {
+                    Some('#') | Some('+') => {
                         tasks.add_tag(arg.to_string());
                     }
+                    
+                    Some('-') => {
+                        tasks.remove_tag(arg.to_string())
+                    }
 
                     Some('.') => {
                         let mut dots = 1;

src/tasks.rs

@@ -364,6 +364,11 @@ impl Tasks {
         self.tags.insert(Hashtag(tag));
     }
 
+    pub(crate) fn remove_tag(&mut self, tag: String) {
+        self.view.clear();
+        self.tags.retain(|t| !t.content().is_some_and(|value| value.to_string().starts_with(&tag)));
+    }
+
     pub(crate) fn set_state_filter(&mut self, state: Option<String>) {
         self.view.clear();
         self.state = state;
@@ -379,7 +384,6 @@ impl Tasks {
 
     pub(crate) fn move_to(&mut self, id: Option<EventId>) {
         self.view.clear();
-        self.tags.clear(); // TODO unsure if this is needed, needs alternative way to clear
         if id == self.position {
             debug!("Flushing Tasks because of move in place");
             self.flush();
@@ -393,7 +397,7 @@ impl Tasks {
             )
         );
         if !id.and_then(|id| self.tasks.get(&id)).is_some_and(|t| t.parent_id() == self.position.as_ref()) {
-            debug!("Flushing Tasks because of move upwards");
+            debug!("Flushing Tasks because of move");
             self.flush();
         }
         self.position = id;