功能更新: 目录点击跳转、翻页按钮移至底部右侧、所有按钮添加悬停提示

src/app.rs

@@ -19,6 +19,33 @@ pub struct AppState {
     pub error_message: Option<String>,
 }
 
+impl AppState {
+    pub fn prev_page(&mut self) {
+        if let Some(ref book) = self.book {
+            if self.current_page > 0 {
+                self.current_page -= 1;
+            } else if self.current_section > 0 {
+                self.current_section -= 1;
+                self.current_page = book.sections[self.current_section]
+                    .pages.len().saturating_sub(2);
+            }
+        }
+    }
+
+    pub fn next_page(&mut self) {
+        if let Some(ref book) = self.book {
+            if self.current_page + 1 < book.sections[self.current_section]
+                .pages.len().saturating_sub(1)
+            {
+                self.current_page += 1;
+            } else if self.current_section + 1 < book.sections.len() {
+                self.current_section += 1;
+                self.current_page = 0;
+            }
+        }
+    }
+}
+
 impl App {
     pub fn new(cc: &eframe::CreationContext<'_>) -> Self {
         let settings_dir = persistence::settings_dir();
@@ -174,10 +201,18 @@ impl eframe::App for App {
             if action.toggle_theme {
                 self.settings.theme = match self.settings.theme {
                     theme::Theme::Light => theme::Theme::Dark,
-                    theme::Theme::Dark => theme::Theme::Light,
+                    theme::Theme::Dark => theme::Theme::Sepia,
+                    theme::Theme::Sepia => theme::Theme::Light,
                 };
                 ctx.set_style(theme::create_style(&self.settings.theme));
             }
+
+            if action.page_prev {
+                self.state.prev_page();
+            }
+            if action.page_next {
+                self.state.next_page();
+            }
         });
 
         self.save_reading_position();