Add basic win line up and line down key bindings

src/ui/inputwin.c

@@ -113,6 +113,8 @@ static int _inp_rl_win_pageup_handler(int count, int key);
 static int _inp_rl_win_pagedown_handler(int count, int key);
 static int _inp_rl_subwin_pageup_handler(int count, int key);
 static int _inp_rl_subwin_pagedown_handler(int count, int key);
+static int _inp_rl_win_lineup_handler(int count, int key);
+static int _inp_rl_win_linedown_handler(int count, int key);
 static int _inp_rl_startup_hook(void);
 
 void
@@ -370,6 +372,9 @@ _inp_rl_addfuncs(void)
     rl_add_funmap_entry("prof_subwin_pageup", _inp_rl_subwin_pageup_handler);
     rl_add_funmap_entry("prof_subwin_pagedown", _inp_rl_subwin_pagedown_handler);
     rl_add_funmap_entry("prof_win_clear", _inp_rl_win_clear_handler);
+
+    rl_add_funmap_entry("prof_win_lineup", _inp_rl_win_lineup_handler);
+    rl_add_funmap_entry("prof_win_linedown", _inp_rl_win_linedown_handler);
 }
 
 // Readline callbacks
@@ -420,6 +425,9 @@ _inp_rl_startup_hook(void)
     rl_bind_keyseq("\\e[6~", _inp_rl_win_pagedown_handler);
     rl_bind_keyseq("\\eOs", _inp_rl_win_pagedown_handler);
 
+    rl_bind_keyseq("\\ep", _inp_rl_win_lineup_handler);
+    rl_bind_keyseq("\\el", _inp_rl_win_linedown_handler);
+
     rl_bind_key('\t', _inp_rl_tab_handler);
 
     // unbind unwanted mappings
@@ -611,6 +619,22 @@ _inp_rl_win_pagedown_handler(int count, int key)
     return 0;
 }
 
+static int
+_inp_rl_win_lineup_handler(int count, int key)
+{
+    ProfWin *current = wins_get_current();
+    win_line_up(current);
+    return 0;
+}
+
+static int
+_inp_rl_win_linedown_handler(int count, int key)
+{
+    ProfWin *current = wins_get_current();
+    win_line_down(current);
+    return 0;
+}
+
 static int
 _inp_rl_subwin_pageup_handler(int count, int key)
 {

src/ui/window.c

@@ -520,6 +520,62 @@ win_page_down(ProfWin *window)
     }
 }
 
+void
+win_line_up(ProfWin *window)
+{
+    int rows = getmaxy(stdscr);
+    int y = getcury(window->layout->win);
+    int page_space = rows - 4;
+    int *page_start = &(window->layout->y_pos);
+
+    *page_start -= 1;
+
+    // went past beginning, show first page
+    if (*page_start < 0)
+        *page_start = 0;
+
+    window->layout->paged = 1;
+    win_update_virtual(window);
+
+    // switch off page if last line and space line visible
+    if ((y) - *page_start == page_space) {
+        window->layout->paged = 0;
+    }
+}
+
+void
+win_line_down(ProfWin *window)
+{
+    window->layout->paged = 0;
+
+    int win_rows = getmaxy(stdscr) - 4;
+    int win_curr_row = getcury(window->layout->win);
+    int curr_y_pos = window->layout->y_pos;
+    if (win_curr_row - curr_y_pos < win_rows) {
+        return;
+    }
+
+    int *page_start = &(window->layout->y_pos);
+
+    *page_start += 1;
+
+    // only got half a screen, show full screen
+    if ((win_curr_row - (*page_start)) < win_rows)
+        *page_start = win_curr_row - win_rows;
+
+    // went past end, show full screen
+    else if (*page_start >= win_curr_row)
+        *page_start = win_curr_row - win_rows - 1;
+
+    window->layout->paged = 1;
+    win_update_virtual(window);
+
+    // switch off page if last line and space line visible
+    if ((win_curr_row) - *page_start == win_rows) {
+        window->layout->paged = 0;
+    }
+}
+
 void
 win_sub_page_down(ProfWin *window)
 {

src/ui/window.h

@@ -79,5 +79,7 @@ void win_page_up(ProfWin *window);
 void win_page_down(ProfWin *window);
 void win_sub_page_down(ProfWin *window);
 void win_sub_page_up(ProfWin *window);
+void win_line_up(ProfWin *window);
+void win_line_down(ProfWin *window);
 
 #endif