fix(command-line): prevent duplicate paste in command line and text fields

src/app/mod.rs

@@ -2096,6 +2096,8 @@ pub enum Message {
     /// Ctrl+V. Routed by `update` into an open text editor, the drawing-object
     /// clipboard, or the system text clipboard.
     PasteShortcut,
+    /// Result of probing whether a text input was focused when `PasteShortcut` arrived.
+    PasteShortcutResolved(bool),
     /// Completion of a system text clipboard read requested by PASTECLIP.
     SystemClipboardPaste(SystemClipboardText),
     /// Ctrl/Cmd+A — select all layer rows when the Layer Manager is open, or all

src/app/update/command.rs

@@ -70,6 +70,48 @@ fn polyline_vertex_count(entity: &AcadEntityType) -> Option<usize> {
     }
 }
 
+#[cfg(not(target_arch = "wasm32"))]
+#[derive(Default)]
+struct CheckTextInputFocused {
+    last_was_text_input: bool,
+    is_focused: bool,
+}
+
+#[cfg(not(target_arch = "wasm32"))]
+impl iced::advanced::widget::Operation<bool> for CheckTextInputFocused {
+    fn text_input(
+        &mut self,
+        _id: Option<&iced::advanced::widget::Id>,
+        _bounds: iced::Rectangle,
+        _state: &mut dyn iced::advanced::widget::operation::TextInput,
+    ) {
+        self.last_was_text_input = true;
+    }
+
+    fn focusable(
+        &mut self,
+        _id: Option<&iced::advanced::widget::Id>,
+        _bounds: iced::Rectangle,
+        state: &mut dyn iced::advanced::widget::operation::Focusable,
+    ) {
+        let is_text = std::mem::replace(&mut self.last_was_text_input, false);
+        if is_text && state.is_focused() {
+            self.is_focused = true;
+        }
+    }
+
+    fn traverse(&mut self, operate: &mut dyn FnMut(&mut dyn iced::advanced::widget::Operation<bool>)) {
+        if self.is_focused {
+            return;
+        }
+        operate(self);
+    }
+
+    fn finish(&self) -> iced::advanced::widget::operation::Outcome<bool> {
+        iced::advanced::widget::operation::Outcome::Some(self.is_focused)
+    }
+}
+
 impl OpenCADStudio {
 pub(super) fn begin_tab_close_queue(&mut self, tab_ids: Vec<u64>) -> Task<Message> {
                 self.pending_tab_closes.clear();
@@ -1955,10 +1997,18 @@ pub(super) fn on_tab_close(&mut self, idx: usize) -> Task<Message> {
                     #[cfg(not(target_arch = "wasm32"))]
                     return Task::none();
                 }
-                if self.clipboard.is_empty() {
-                    self.read_system_clipboard_for_paste()
-                } else {
-                    Task::done(Message::Command("PASTECLIP".to_string()))
+                #[cfg(not(target_arch = "wasm32"))]
+                {
+                    iced::advanced::widget::operate(CheckTextInputFocused::default())
+                        .map(Message::PasteShortcutResolved)
+                }
+                #[cfg(target_arch = "wasm32")]
+                {
+                    if self.clipboard.is_empty() {
+                        self.read_system_clipboard_for_paste()
+                    } else {
+                        Task::done(Message::Command("PASTECLIP".to_string()))
+                    }
                 }
     }
 

src/app/update/mod.rs

@@ -6104,6 +6104,18 @@ impl OpenCADStudio {
             // take priority and system text is used when that clipboard is empty.
             Message::PasteShortcut => self.on_paste_shortcut(),
 
+            Message::PasteShortcutResolved(focused) => {
+                if focused {
+                    // A focused text_input widget already handled Ctrl+V natively.
+                    // Doing anything here would duplicate the paste or leak text into the command line.
+                    Task::none()
+                } else if self.clipboard.is_empty() {
+                    self.read_system_clipboard_for_paste()
+                } else {
+                    self.dispatch_command("PASTECLIP")
+                }
+            }
+
             Message::SystemClipboardPaste(result) => {
                 use super::SystemClipboardText as Text;
 
@@ -10967,6 +10979,29 @@ mod free_text_entry_tests {
         let _ = app.update(Message::CommandInput(">Plugin MixedCase".into()));
         assert_eq!(app.command_line.input, ">Plugin MixedCase");
     }
+
+    #[test]
+    fn paste_shortcut_resolved_focused_is_noop() {
+        let mut app = OpenCADStudio::new_for_test();
+        app.automation_op(r#"{"op":"new"}"#);
+        app.command_line.input = "EXISTING".into();
+
+        // When a text input is focused, PasteShortcutResolved(true) does not mutate command line or start a command.
+        let _ = app.update(Message::PasteShortcutResolved(true));
+        assert_eq!(app.command_line.input, "EXISTING");
+        assert!(app.tabs[0].active_cmd.is_none());
+    }
+
+    #[test]
+    fn paste_shortcut_resolved_unfocused_with_entities_starts_pasteclip() {
+        let mut app = OpenCADStudio::new_for_test();
+        app.automation_op(r#"{"op":"new"}"#);
+        app.clipboard = vec![acadrust::EntityType::Line(acadrust::entities::Line::default())];
+
+        // When unfocused and CAD entities are copied, dispatches PASTECLIP
+        let _ = app.update(Message::PasteShortcutResolved(false));
+        assert!(app.tabs[0].active_cmd.as_ref().is_some_and(|cmd| cmd.name() == "PASTECLIP"));
+    }
 }
 
 /// Set or clear one bit of `SELECTIONPREVIEW`.