From 141e69547cd545c6517ee4b9c9adfa633b697900 Mon Sep 17 00:00:00 2001
From: "n loewen (aider)" <nick@nloewen.com>
Date: Sat, 7 Jun 2025 21:45:51 +0100
Subject: [PATCH] feat: Implement line-by-line selection with real-time visual
 feedback

---
 gtm2.py | 38 ++++++++++++++++++++++++++------------
 1 file changed, 26 insertions(+), 12 deletions(-)

diff --git a/gtm2.py b/gtm2.py
index e9ca059..c89521e 100755
--- a/gtm2.py
+++ b/gtm2.py
@@ -278,11 +278,18 @@ def draw_selection(stdscr, state):
         return
 
     start_x, start_y = state.selection_start_coord
-    end_x, end_y = state.selection_end_coord
+    _, end_y = state.selection_end_coord
     
-    x1, x2 = min(start_x, end_x), max(start_x, end_x)
     y1, y2 = min(start_y, end_y), max(start_y, end_y)
 
+    # Determine pane from where selection started
+    pane = 'left' if start_x < state.divider_col else 'right'
+
+    if pane == 'left':
+        x1, x2 = 0, state.divider_col - 1
+    else: # right
+        x1, x2 = state.divider_col + 2, state.width - 1
+
     for y in range(y1, y2 + 1):
         try:
             # chgat can fail at the bottom-right corner of the screen
@@ -350,25 +357,32 @@ def copy_selection_to_clipboard(stdscr, state):
         return
 
     start_x, start_y = state.selection_start_coord
-    end_x, end_y = state.selection_end_coord
+    _, end_y = state.selection_end_coord
 
-    x1, x2 = min(start_x, end_x), max(start_x, end_x)
     y1, y2 = min(start_y, end_y), max(start_y, end_y)
 
+    # Determine pane from where selection started
+    pane = 'left' if start_x < state.divider_col else 'right'
+
+    if pane == 'left':
+        x1, x2 = 0, state.divider_col - 1
+    else: # right
+        x1, x2 = state.divider_col + 2, state.width - 1
+
     height, width = stdscr.getmaxyx()
     selected_text_parts = []
 
     for y in range(y1, y2 + 1):
         if 0 <= y < height:
             line_str = ""
-            for x in range(x1, x2 + 1):
-                if 0 <= x < width:
-                    try:
-                        char_and_attr = stdscr.inch(y, x)
-                        char = char_and_attr & 0xFF
-                        line_str += chr(char)
-                    except curses.error:
-                        line_str += " "
+            end_col = min(x2, width - 1)
+            for x in range(x1, end_col + 1):
+                try:
+                    char_and_attr = stdscr.inch(y, x)
+                    char = char_and_attr & 0xFF
+                    line_str += chr(char)
+                except curses.error:
+                    line_str += " "
             selected_text_parts.append(line_str.rstrip())
 
     if selected_text_parts: