Add vertical separator + basic scrolling

git_time_machine.py

@@ -1,6 +1,4 @@
 # by ChatGPT
-
-
 import curses
 import subprocess
 import sys
@@ -17,46 +15,75 @@ def get_file_at_commit(commit_hash, filename):
 
 def main(stdscr, filename):
     curses.curs_set(0)
+    curses.mousemask(curses.ALL_MOUSE_EVENTS)
     stdscr.keypad(True)
 
     commits = get_commits(filename)
-    selected = 0
+    selected_commit = 0
+    divider_col = 40
+    focus = "left"
+    scroll_offset = 0
 
     while True:
         stdscr.clear()
         height, width = stdscr.getmaxyx()
-        mid = width // 2
 
         # Draw commit list on the left
-        for i, line in enumerate(commits):
-            if i >= height:
-                break
-            if i == selected:
+        for i in range(min(len(commits), height)):
+            line = commits[i]
+            if i == selected_commit and focus == "left":
                 stdscr.attron(curses.A_REVERSE)
-            stdscr.addnstr(i, 0, line, mid - 1)
-            if i == selected:
+            stdscr.addnstr(i, 0, line, divider_col - 1)
+            if i == selected_commit and focus == "left":
                 stdscr.attroff(curses.A_REVERSE)
 
-        # Show file content on the right
+        # Draw vertical divider with box-drawing character
+        for y in range(height):
+            stdscr.addch(y, divider_col, '│')
+
+        # Draw file content on the right
         if commits:
-            commit_hash = commits[selected].split()[0]
+            commit_hash = commits[selected_commit].split()[0]
             file_lines = get_file_at_commit(commit_hash, filename)
-            for i, line in enumerate(file_lines):
-                if i >= height:
-                    break
-                stdscr.addnstr(i, mid + 1, line, width - mid - 2)
+            visible_lines = file_lines[scroll_offset:scroll_offset + height]
+            for i, line in enumerate(visible_lines):
+                stdscr.addnstr(i, divider_col + 2, line, width - divider_col - 3)
 
         stdscr.refresh()
 
         key = stdscr.getch()
-        if key in [ord('q'), 27]:  # q or ESC to quit
+
+        if key == curses.KEY_MOUSE:
+            try:
+                _, mx, my, _, bstate = curses.getmouse()
+                if bstate & curses.BUTTON1_CLICKED:
+                    focus = "left" if mx <= divider_col else "right"
+            except curses.error:
+                pass
+
+        elif key in [ord('q'), 27]:
             break
-        elif key in [curses.KEY_DOWN, ord('j')]:
-            if selected < len(commits) - 1:
-                selected += 1
-        elif key in [curses.KEY_UP, ord('k')]:
-            if selected > 0:
-                selected -= 1
+
+        elif focus == "left":
+            if key in [curses.KEY_DOWN, ord('j')]:
+                if selected_commit < len(commits) - 1:
+                    selected_commit += 1
+                    scroll_offset = 0  # reset right pane scroll
+            elif key in [curses.KEY_UP, ord('k')]:
+                if selected_commit > 0:
+                    selected_commit -= 1
+                    scroll_offset = 0
+
+        elif focus == "right":
+            if key == curses.KEY_DOWN or key == ord('j'):
+                scroll_offset += 1
+            elif key == curses.KEY_UP or key == ord('k'):
+                if scroll_offset > 0:
+                    scroll_offset -= 1
+            elif key == curses.KEY_NPAGE:  # Page Down
+                scroll_offset += height
+            elif key == curses.KEY_PPAGE:  # Page Up
+                scroll_offset = max(0, scroll_offset - height)
 
 if __name__ == "__main__":
     if len(sys.argv) != 2: