Make only changed area repaintable

src/cursor.rs

@@ -2,8 +2,8 @@ use cairo;
 use ui_model::Color;
 use ui::UI;
 use shell::{Shell, NvimMode};
+use nvim::{RepaintMode, RedrawEvents};
 use std::sync::{Arc, Mutex};
-use gtk::WidgetExt;
 
 use glib;
 
@@ -31,12 +31,29 @@ impl Alpha {
 }
 
 enum AnimPhase {
-    Shown,
+    Shown(i32),
     Hide,
-    Hidden,
+    Hidden(i32),
     Show,
 }
 
+impl AnimPhase {
+    fn sub(&mut self, step: i32) -> bool {
+        match self {
+            &mut AnimPhase::Shown(ref mut val) |
+                &mut AnimPhase::Hidden(ref mut val) => {
+                    *val -= step;
+                    if *val <= 0 {
+                        false
+                    } else {
+                        true
+                    }
+                }
+            _ => false,
+        }
+    }
+}
+
 pub struct State {
     alpha: Alpha,
     anim_phase: AnimPhase,
@@ -46,12 +63,11 @@ impl State {
     pub fn new() -> State {
         State {
             alpha: Alpha(1.0),
-            anim_phase: AnimPhase::Shown,
+            anim_phase: AnimPhase::Shown(500),
         }
     }
 }
 
-// display, 2 sec -> hiding 1 sec -> not visible 1 sec -> showing 1 sec
 pub struct Cursor {
     timer: Option<glib::SourceId>,
 
@@ -73,41 +89,54 @@ impl Cursor {
             let state = self.state.clone();
             self.timer = Some(glib::timeout_add(100, move || {
                 let mut mut_state = state.lock().unwrap();
+
+                // wait
+                // [TODO]: Implement wait through new timeout - 2017-03-24 10:21
+                if mut_state.anim_phase.sub(100) {
+                    return glib::Continue(true);
+                }
+
                 match mut_state.anim_phase {
-                    AnimPhase::Shown => {
+                    AnimPhase::Shown(_) => {
                         mut_state.anim_phase = AnimPhase::Hide;
                     }
                     AnimPhase::Hide => {
-                        if !mut_state.alpha.hide(0.1) {
-                            mut_state.anim_phase = AnimPhase::Hidden;
+                        if !mut_state.alpha.hide(0.3) {
+                            mut_state.anim_phase = AnimPhase::Hidden(300);
                         }
                     }
-                    AnimPhase::Hidden => {
+                    AnimPhase::Hidden(_) => {
                         mut_state.anim_phase = AnimPhase::Show;
                     }
                     AnimPhase::Show => {
-                        if !mut_state.alpha.show(0.1) {
-                            mut_state.anim_phase = AnimPhase::Shown;
+                        if !mut_state.alpha.show(0.3) {
+                            mut_state.anim_phase = AnimPhase::Shown(500);
                         }
                     }
                 }
 
                 SHELL!(&shell = {
-                    // FIXME: repaint only changed area
-                    shell.drawing_area.queue_draw();
+                    let point = shell.model.cur_point();
+                    shell.on_redraw(&RepaintMode::Area(point));
                 });
                 glib::Continue(true)
             }));
         }
     }
 
-    pub fn draw(&self, ctx: &cairo::Context, shell: &Shell, 
-                char_width: f64, line_height: f64, line_y: f64, double_width: bool, bg: &Color) {
+    pub fn draw(&self,
+                ctx: &cairo::Context,
+                shell: &Shell,
+                char_width: f64,
+                line_height: f64,
+                line_y: f64,
+                double_width: bool,
+                bg: &Color) {
 
 
         let current_point = ctx.get_current_point();
         let state = self.state.lock().unwrap();
-        ctx.set_source_rgba(1.0 - bg.0, 1.0 - bg.1, 1.0 - bg.2, 0.5 * state.alpha.0);
+        ctx.set_source_rgba(1.0 - bg.0, 1.0 - bg.1, 1.0 - bg.2, 0.6 * state.alpha.0);
 
         let cursor_width = if shell.mode == NvimMode::Insert {
             char_width / 5.0

src/shell.rs

@@ -469,7 +469,7 @@ fn gtk_configure_event(_: &DrawingArea, ev: &EventConfigure) -> bool {
 
 impl RedrawEvents for Shell {
     fn on_cursor_goto(&mut self, row: u64, col: u64) -> RepaintMode {
-        RepaintMode::Area(self.model.set_cursor(row, col))
+        RepaintMode::Area(self.model.set_cursor(row as usize, col as usize))
     }
 
     fn on_put(&mut self, text: &str) -> RepaintMode {

src/ui_model.rs

@@ -152,11 +152,11 @@ impl UiModel {
         ModelRect::point(self.cur_row, self.cur_col)
     }
 
-    pub fn set_cursor(&mut self, row: u64, col: u64) -> ModelRect {
+    pub fn set_cursor(&mut self, row: usize, col: usize) -> ModelRect {
         let mut changed_region = self.cur_point();
 
-        self.cur_row = row as usize;
-        self.cur_col = col as usize;
+        self.cur_row = row;
+        self.cur_col = col;
 
         changed_region.join(&self.cur_point());
 
@@ -298,8 +298,8 @@ impl ModelRect {
     pub fn to_area(&self, line_height: f64, char_width: f64) -> (i32, i32, i32, i32) {
         (self.left as i32 * char_width as i32,
          self.top as i32 * line_height as i32,
-         (self.right - self.left + 1) as i32 * char_width as i32- 1,
-         (self.bot - self.top + 1) as i32 * line_height as i32 - 1)
+         (self.right - self.left + 1) as i32 * char_width as i32,
+         (self.bot - self.top + 1) as i32 * line_height as i32)
     }
 
     pub fn from_area(line_height: f64, char_width: f64, x1: f64, y1: f64, x2: f64, y2: f64) -> ModelRect {
@@ -474,8 +474,8 @@ mod tests {
 
         assert_eq!(5, x);
         assert_eq!(10, y);
-        assert_eq!(4, width);
-        assert_eq!(9, height);
+        assert_eq!(5, width);
+        assert_eq!(10, height);
     }
 
     #[test]