From f52f0e354a16da7df8eea49efa00834adf0b4b59 Mon Sep 17 00:00:00 2001
From: William McBrine <wmcbrine@gmail.com>
Date: Wed, 6 Dec 2017 21:36:22 -0500
Subject: [PATCH] User resizing for the Win32 console (recent Windows versions
 only).

---
 win32/pdckbd.c  | 18 +++++++++++++++---
 win32/pdcscrn.c | 42 +++++++++++++++++++++++++-----------------
 2 files changed, 40 insertions(+), 20 deletions(-)

diff --git a/win32/pdckbd.c b/win32/pdckbd.c
index ff8464b4..298130db 100644
--- a/win32/pdckbd.c
+++ b/win32/pdckbd.c
@@ -36,9 +36,10 @@ static int save_press = 0;
 
 #define KEV save_ip.Event.KeyEvent
 #define MEV save_ip.Event.MouseEvent
+#define REV save_ip.Event.WindowBufferSizeEvent
 
 /************************************************************************
- *    Table for key code translation of function keys in keypad mode    *  
+ *    Table for key code translation of function keys in keypad mode    *
  *    These values are for strict IBM keyboard compatibles only         *
  ************************************************************************/
 
@@ -614,7 +615,8 @@ int PDC_get_key(void)
         ReadConsoleInput(pdc_con_in, &save_ip, 1, &count);
         event_count--;
 
-        if (save_ip.EventType == MOUSE_EVENT)
+        if (save_ip.EventType == MOUSE_EVENT ||
+            save_ip.EventType == WINDOW_BUFFER_SIZE_EVENT)
             key_count = 1;
         else if (save_ip.EventType == KEY_EVENT)
             key_count = _get_key_count();
@@ -631,6 +633,16 @@ int PDC_get_key(void)
 
         case MOUSE_EVENT:
             return _process_mouse_event();
+
+        case WINDOW_BUFFER_SIZE_EVENT:
+            if (REV.dwSize.Y != LINES || REV.dwSize.X != COLS)
+            {
+                if (!SP->resized)
+                {
+                    SP->resized = TRUE;
+                    return KEY_RESIZE;
+                }
+            }
         }
     }
 
@@ -655,7 +667,7 @@ int PDC_mouse_set(void)
        had on startup, and clear all other flags */
 
     SetConsoleMode(pdc_con_in, SP->_trap_mbe ?
-                   (ENABLE_MOUSE_INPUT|0x0080) : (pdc_quick_edit|0x0080));
+                   (ENABLE_MOUSE_INPUT|0x0088) : (pdc_quick_edit|0x0088));
 
     memset(&old_mouse_status, 0, sizeof(old_mouse_status));
 
diff --git a/win32/pdcscrn.c b/win32/pdcscrn.c
index bc7dfb4d..a86f50e0 100644
--- a/win32/pdcscrn.c
+++ b/win32/pdcscrn.c
@@ -512,30 +512,38 @@ int PDC_resize_screen(int nlines, int ncols)
     SMALL_RECT rect;
     COORD size, max;
 
-    if (nlines < 2 || ncols < 2)
-        return ERR;
+    if (nlines || ncols)
+    {
+        if (nlines < 2 || ncols < 2)
+            return ERR;
 
-    max = GetLargestConsoleWindowSize(pdc_con_out);
+        max = GetLargestConsoleWindowSize(pdc_con_out);
 
-    rect.Left = rect.Top = 0;
-    rect.Right = ncols - 1;
+        rect.Left = rect.Top = 0;
+        rect.Right = ncols - 1;
 
-    if (rect.Right > max.X)
-        rect.Right = max.X;
+        if (rect.Right > max.X)
+            rect.Right = max.X;
 
-    rect.Bottom = nlines - 1;
+        rect.Bottom = nlines - 1;
 
-    if (rect.Bottom > max.Y)
-        rect.Bottom = max.Y;
+        if (rect.Bottom > max.Y)
+            rect.Bottom = max.Y;
 
-    size.X = rect.Right + 1;
-    size.Y = rect.Bottom + 1;
+        size.X = rect.Right + 1;
+        size.Y = rect.Bottom + 1;
 
-    _fit_console_window(pdc_con_out, &rect);
-    SetConsoleScreenBufferSize(pdc_con_out, size);
-    _fit_console_window(pdc_con_out, &rect);
-    SetConsoleScreenBufferSize(pdc_con_out, size);
-    SetConsoleActiveScreenBuffer(pdc_con_out);
+        _fit_console_window(pdc_con_out, &rect);
+        SetConsoleScreenBufferSize(pdc_con_out, size);
+        _fit_console_window(pdc_con_out, &rect);
+        SetConsoleScreenBufferSize(pdc_con_out, size);
+        SetConsoleActiveScreenBuffer(pdc_con_out);
+    }
+
+    PDC_flushinp();
+
+    SP->resized = FALSE;
+    SP->cursrow = SP->curscol = 0;
 
     return OK;
 }