Add more scroll options

Cargo.toml

@@ -9,6 +9,7 @@ license = "AGPL-3.0-or-later"
 repository = "https://github.com/henriklovhaug/md-tui"
 homepage = "https://github.com/henriklovhaug/md-tui"
 keywords = ["markdown", "terminal", "viewer", "tui"]
+categories = ["command-line-interface", "command-line-utilities"]
 
 [[bin]]
 name = "mdt"

README.md

@@ -21,6 +21,8 @@ Using AUR: `yay -S md-tui-bin`
 | ---------- | ---------------------------------------------------------------------- |
 | `j`        | Scroll down                                                            |
 | `k`        | Scroll up                                                              |
+| `l`        | Scroll one page down                                                   |
+| `h`        | Scroll one page up                                                     |
 | `r`        | Reload file                                                            |
 | `f` or `/` | Search                                                                 |
 | `s`        | Enter select link mode                                                 |

src/event_handler.rs

@@ -86,9 +86,27 @@ pub fn keyboard_mode_file_tree(
             KeyCode::Char('j') => {
                 file_tree.next(height);
             }
+
             KeyCode::Char('k') => {
                 file_tree.previous(height);
             }
+
+            KeyCode::Char('l') => {
+                file_tree.next_page(height);
+            }
+
+            KeyCode::Char('h') => {
+                file_tree.previous_page(height);
+            }
+
+            KeyCode::Char('g') => {
+                file_tree.first();
+            }
+
+            KeyCode::Char('G') => {
+                file_tree.last(height);
+            }
+
             KeyCode::Enter => {
                 let file = if let Some(file) = file_tree.selected() {
                     file
@@ -258,6 +276,18 @@ fn keyboard_mode_view(
             KeyCode::Char('u') => {
                 app.vertical_scroll = app.vertical_scroll.saturating_sub(height / 2);
             }
+
+            KeyCode::Char('l') => {
+                app.vertical_scroll = cmp::min(
+                    app.vertical_scroll + height,
+                    markdown.height().saturating_sub(height / 2),
+                );
+            }
+
+            KeyCode::Char('h') => {
+                app.vertical_scroll = app.vertical_scroll.saturating_sub(height);
+            }
+
             KeyCode::Char('s') => {
                 app.vertical_scroll = if let Ok(scroll) = markdown.select(app.select_index) {
                     app.selected = true;

src/pages/file_explorer.rs

@@ -188,6 +188,50 @@ impl FileTree {
         self.list_state.select(Some(i));
     }
 
+    pub fn next_page(&mut self, height: u16) {
+        let partition = self.partition(height);
+        let i = match self.list_state.selected() {
+            Some(i) => {
+                if i + partition >= self.files.len() {
+                    0
+                } else {
+                    i + partition
+                }
+            }
+            None => 0,
+        };
+        self.page = (i / partition) as u32;
+        self.list_state.select(Some(i));
+    }
+
+    pub fn previous_page(&mut self, height: u16) {
+        let partition = self.partition(height);
+        let i = match self.list_state.selected() {
+            Some(i) => {
+                if i < partition {
+                    self.files.len() - partition
+                } else {
+                    i - partition
+                }
+            }
+            None => 0,
+        };
+        self.page = (i / partition) as u32;
+        self.list_state.select(Some(i));
+    }
+
+    pub fn first(&mut self) {
+        self.list_state.select(Some(0));
+        self.page = 0;
+    }
+
+    pub fn last(&mut self, height: u16) {
+        let partition = self.partition(height);
+        let i = self.files.len() - 2;
+        self.list_state.select(Some(i));
+        self.page = (i / partition) as u32;
+    }
+
     pub fn unselect(&mut self) {
         self.list_state.select(None);
     }