Allow resizing panes with the mouse (#4678)

* initial implementation

* improve edge detection

* fix up/down resize increment bug

* temporarily disable alt-mouse grouping

* fix inverting strategies and simplify edge detection

* resize of floating -> ctrl click, resize of tiled -> (ctrl)click

* fix old functionality and tests

* refactor and fixes

* refactor mouse click handling

* move mouse click handling to separate module

* resize scroll up/down with scroll wheel

* tests for scroll resize

* implement hover help

* fix occlusion bug

* allow disabling with config

* fix focus pinned pane on frame

* use strategy invert resize directly rather than function parameter

* remove annoying log message

* cleanups and formatting

* add pr

1 files changed, 120 insertions, 0 deletions

diff --git a/zellij-utils/src/input/mouse.rs b/zellij-utils/src/input/mouse.rs
index 0977d5e7..a8fcb5a7 100644
--- a/zellij-utils/src/input/mouse.rs
+++ b/zellij-utils/src/input/mouse.rs
@@ -238,6 +238,126 @@ impl MouseEvent {
         };
         event
     }
+    pub fn new_left_press_with_ctrl_event(position: Position) -> Self {
+        let event = MouseEvent {
+            event_type: MouseEventType::Press,
+            left: true,
+            right: false,
+            middle: false,
+            wheel_up: false,
+            wheel_down: false,
+            shift: false,
+            alt: false,
+            ctrl: true,
+            position,
+        };
+        event
+    }
+    pub fn new_left_motion_with_ctrl_event(position: Position) -> Self {
+        let event = MouseEvent {
+            event_type: MouseEventType::Motion,
+            left: true,
+            right: false,
+            middle: false,
+            wheel_up: false,
+            wheel_down: false,
+            shift: false,
+            alt: false,
+            ctrl: true,
+            position,
+        };
+        event
+    }
+    pub fn new_left_release_with_ctrl_event(position: Position) -> Self {
+        let event = MouseEvent {
+            event_type: MouseEventType::Release,
+            left: true,
+            right: false,
+            middle: false,
+            wheel_up: false,
+            wheel_down: false,
+            shift: false,
+            alt: false,
+            ctrl: true,
+            position,
+        };
+        event
+    }
+    pub fn new_left_motion_with_alt_event(position: Position) -> Self {
+        let event = MouseEvent {
+            event_type: MouseEventType::Motion,
+            left: true,
+            right: false,
+            middle: false,
+            wheel_up: false,
+            wheel_down: false,
+            shift: false,
+            alt: true,
+            ctrl: false,
+            position,
+        };
+        event
+    }
+    pub fn new_scroll_up_event(position: Position) -> Self {
+        let event = MouseEvent {
+            event_type: MouseEventType::Press,
+            left: false,
+            right: false,
+            middle: false,
+            wheel_up: true,
+            wheel_down: false,
+            shift: false,
+            alt: false,
+            ctrl: false,
+            position,
+        };
+        event
+    }
+    pub fn new_scroll_down_event(position: Position) -> Self {
+        let event = MouseEvent {
+            event_type: MouseEventType::Press,
+            left: false,
+            right: false,
+            middle: false,
+            wheel_up: false,
+            wheel_down: true,
+            shift: false,
+            alt: false,
+            ctrl: false,
+            position,
+        };
+        event
+    }
+    pub fn new_ctrl_scroll_up_event(position: Position) -> Self {
+        let event = MouseEvent {
+            event_type: MouseEventType::Press,
+            left: false,
+            right: false,
+            middle: false,
+            wheel_up: true,
+            wheel_down: false,
+            shift: false,
+            alt: false,
+            ctrl: true,
+            position,
+        };
+        event
+    }
+    pub fn new_ctrl_scroll_down_event(position: Position) -> Self {
+        let event = MouseEvent {
+            event_type: MouseEventType::Press,
+            left: false,
+            right: false,
+            middle: false,
+            wheel_up: false,
+            wheel_down: true,
+            shift: false,
+            alt: false,
+            ctrl: true,
+            position,
+        };
+        event
+    }
 }
 
 impl Default for MouseEvent {