Run clippy fix

src/cache.rs

@@ -38,11 +38,11 @@ impl PageCache {
 
     pub fn get_page_or_cache(&mut self, page_number: usize) -> Result<Rc<MyPageType>> {
         if let Some(page) = self.get_page(page_number) {
-            return Ok(page);
+            Ok(page)
         } else {
             let _ = self.cache_page(page_number, 100);
             if let Some(page) = self.get_page(page_number) {
-                return Ok(page);
+                Ok(page)
             } else {
                 bail!("Failed caching and retrieving page {}", page_number);
             }

src/ui.rs

@@ -2,6 +2,7 @@ use std::{
     cell::RefCell,
     path::{Path, PathBuf},
     rc::Rc,
+    time::{Duration, Instant},
 };
 
 use gtk::{
@@ -24,6 +25,7 @@ pub struct Ui {
     pub image_left: Picture,
     pub image_right: Picture,
     pub document_canvas: Option<DocumentCanvas>,
+    pub last_touch_time: Option<Instant>,
 }
 
 pub struct DocumentCanvas {
@@ -55,21 +57,19 @@ impl DocumentCanvas {
 
     pub fn cache_initial_pages(&self, area_height: i32) {
         self.page_cache_sender.send_priority_cache_commands(
-            &vec![self.current_page_number, self.current_page_number + 1],
+            &[self.current_page_number, self.current_page_number + 1],
             area_height,
         );
     }
 
     pub fn cache_surrounding_pages(&self, area_height: i32) {
         self.page_cache_sender.send_cache_commands(
-            &vec![
+            &[self.current_page_number.saturating_sub(2),
-                self.current_page_number.saturating_sub(2),
                 self.current_page_number.saturating_sub(1),
                 self.current_page_number,
                 self.current_page_number + 1,
                 self.current_page_number + 2,
-                self.current_page_number + 3,
+                self.current_page_number + 3],
-            ],
             area_height,
         );
     }
@@ -152,6 +152,14 @@ fn process_right_click(ui: &mut Ui, _x: f64, _y: f64) {
 }
 
 fn process_left_click(ui: &mut Ui, x: f64, y: f64) {
+    if let Some(last_touch_time) = ui.last_touch_time {
+        if last_touch_time.elapsed() < Duration::from_millis(100) {
+            // Prevent accidental double touching
+            return;
+        }
+    }
+
+    ui.last_touch_time = Some(Instant::now());
     if ui.document_canvas.is_none() {
         return;
     }
@@ -238,6 +246,7 @@ impl Ui {
             image_left,
             image_right,
             document_canvas: None,
+            last_touch_time: None,
         };
         let ui = Rc::new(RefCell::new(ui));