[PATCH RFC v5 10/12] char-win-stdio: add support for terminal size

[Filip Hejsek <filip.hejsek@gmail.com>]

Use GetConsoleScreenBufferInfo to obtain terminal size
and set ENABLE_WINDOW_INPUT to receive resize notifications.

Signed-off-by: Filip Hejsek <filip.hejsek@gmail.com>
---
 chardev/char-win-stdio.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/chardev/char-win-stdio.c b/chardev/char-win-stdio.c
index fb802a00b13ac4089abf3bd4f8c4198d8325764b..0d33138d0dd83b582e959d21c3d991de52f8d3e4 100644
--- a/chardev/char-win-stdio.c
+++ b/chardev/char-win-stdio.c
@@ -44,6 +44,20 @@ typedef struct WinStdioChardev WinStdioChardev;
 DECLARE_INSTANCE_CHECKER(WinStdioChardev, WIN_STDIO_CHARDEV,
                          TYPE_CHARDEV_WIN_STDIO)
 
+static void char_win_stdio_resize(Chardev *chr)
+{
+    HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
+    CONSOLE_SCREEN_BUFFER_INFO ScreenBufferInfo;
+
+    if (GetConsoleScreenBufferInfo(hStdOut, &ScreenBufferInfo)) {
+        uint16_t cols = ScreenBufferInfo.srWindow.Right + 1
+                        - ScreenBufferInfo.srWindow.Left;
+        uint16_t rows = ScreenBufferInfo.srWindow.Bottom + 1
+                        - ScreenBufferInfo.srWindow.Top;
+        qemu_chr_resize(chr, cols, rows);
+    }
+}
+
 static void win_stdio_wait_func(void *opaque)
 {
     Chardev *chr = CHARDEV(opaque);
@@ -75,6 +89,9 @@ static void win_stdio_wait_func(void *opaque)
                 }
             }
         }
+        if (buf[i].EventType == WINDOW_BUFFER_SIZE_EVENT) {
+            char_win_stdio_resize(chr);
+        }
     }
 }
 
@@ -202,6 +219,8 @@ static void qemu_chr_open_stdio(Chardev *chr,
         } else {
             dwMode &= ~ENABLE_PROCESSED_INPUT;
         }
+        dwMode |= ENABLE_WINDOW_INPUT;
+        char_win_stdio_resize(chr);
     }
 
     SetConsoleMode(stdio->hStdIn, dwMode);

-- 
2.51.0