Introduce max_height method

This introduces the tui_win_info::max_height method and changes
new_height_ok to use it, rather than checking the window type
directly.

gdb/ChangeLog
2019-06-25  Tom Tromey  <tom@tromey.com>

	* tui/tui-win.c (tui_win_info::max_height)
	(tui_cmd_window::max_height): New methods.
	(new_height_ok): Call max_height.
	* tui/tui-data.h (struct tui_win_info, struct tui_cmd_window)
	<max_height>: New method.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index c8850c1..174d12b 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,13 @@
 2019-06-25  Tom Tromey  <tom@tromey.com>
 
+       * tui/tui-win.c (tui_win_info::max_height)
+       (tui_cmd_window::max_height): New methods.
+       (new_height_ok): Call max_height.
+       * tui/tui-data.h (struct tui_win_info, struct tui_cmd_window)
+       <max_height>: New method.
+
+2019-06-25  Tom Tromey  <tom@tromey.com>
+
        * tui/tui-win.c (tui_source_window_base::set_new_height)
        (tui_data_window::set_new_height): New methods.
        (make_invisible_and_set_new_height): Call set_new_height method.

diff --git a/gdb/tui/tui-data.h b/gdb/tui/tui-data.h
index 07ec977..08b0dad 100644 (file)
--- a/gdb/tui/tui-data.h
+++ b/gdb/tui/tui-data.h
@@ -273,6 +273,9 @@ public:
   {
   }
 
+  /* Compute the maximum height of this window.  */
+  virtual int max_height () const;
+
   /* Methods to scroll the contents of this window.  Note that they
      are named with "_scroll" coming at the end because the more
      obvious "scroll_forward" is defined as a macro in term.h.  */
@@ -426,6 +429,8 @@ struct tui_cmd_window : public tui_win_info
   {
   }
 
+  int max_height () const override;
+
   int start_line = 0;
 
 protected:

diff --git a/gdb/tui/tui-win.c b/gdb/tui/tui-win.c
index fe1e901..dc40ab7 100644 (file)
--- a/gdb/tui/tui-win.c
+++ b/gdb/tui/tui-win.c
@@ -1377,6 +1377,22 @@ make_visible_with_new_height (struct tui_win_info *win_info)
 }
 
 
+/* See tui-data.h.  */
+
+int
+tui_win_info::max_height () const
+{
+  return tui_term_height () - 2;
+}
+
+/* See tui-data.h.  */
+
+int
+tui_cmd_window::max_height () const
+{
+  return tui_term_height () - 4;
+}
+
 static int
 new_height_ok (struct tui_win_info *primary_win_info, 
               int new_height)
@@ -1391,12 +1407,8 @@ new_height_ok (struct tui_win_info *primary_win_info,
       diff = (new_height - primary_win_info->generic.height) * (-1);
       if (cur_layout == SRC_COMMAND || cur_layout == DISASSEM_COMMAND)
        {
-         ok = ((primary_win_info->generic.type == CMD_WIN 
-                && new_height <= (tui_term_height () - 4) 
-                && new_height >= MIN_CMD_WIN_HEIGHT) 
-               || (primary_win_info->generic.type != CMD_WIN 
-                   && new_height <= (tui_term_height () - 2) 
-                   && new_height >= MIN_WIN_HEIGHT));
+         ok = (new_height <= primary_win_info->max_height ()
+               && new_height >= MIN_CMD_WIN_HEIGHT);
          if (ok)
            {                   /* Check the total height.  */
              struct tui_win_info *win_info;