Remove tui_scroll_direction enum

The tui_scroll_direction enum is not really needed, because it's
simple to adapt the various scrolling methods to use the sign of their
argument as the direction in which to scroll.

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

	* tui/tui-winsource.c
	(tui_source_window_base::do_scroll_horizontal): Remove direction
	parameter.
	* tui/tui-windata.c (tui_data_window::do_scroll_vertical): Remove
	direction parameter.
	* tui/tui-win.c (tui_win_info::forward_scroll)
	(tui_win_info::backward_scroll, tui_win_info::left_scroll)
	(tui_win_info::right_scroll): Update.
	* tui/tui-source.c (tui_source_window::do_scroll_vertical): Remove
	direction parameter.
	* tui/tui-disasm.c (tui_disasm_window::do_scroll_vertical): Remove
	direction parameter.
	* tui/tui-data.h (enum tui_scroll_direction): Remove.
	(struct tui_win_info) <do_scroll_vertical, do_scroll_horizontal>:
	Remove direction parameter.
	(struct tui_source_window_base, struct tui_source_window)
	(struct tui_disasm_window, struct tui_data_window)
	(struct tui_cmd_window): Update.

1 files changed, 9 insertions, 28 deletions

diff --git a/gdb/tui/tui-data.h b/gdb/tui/tui-data.h
index d977c57..59d1900 100644
--- a/gdb/tui/tui-data.h
+++ b/gdb/tui/tui-data.h
@@ -122,16 +122,6 @@ struct tui_gen_win_info
 #define MAX_TARGET_WIDTH  10
 #define MAX_PID_WIDTH     19
 
-/* Scroll direction enum.  */
-enum tui_scroll_direction
-{
-  FORWARD_SCROLL,
-  BACKWARD_SCROLL,
-  LEFT_SCROLL,
-  RIGHT_SCROLL
-};
-
-
 /* The kinds of layouts available.  */
 enum tui_layout_type
 {
@@ -264,13 +254,11 @@ protected:
 
   /* Scroll the contents vertically.  This is only called via
      forward_scroll and backward_scroll.  */
-  virtual void do_scroll_vertical (enum tui_scroll_direction,
-				   int num_to_scroll) = 0;
+  virtual void do_scroll_vertical (int num_to_scroll) = 0;
 
   /* Scroll the contents horizontally.  This is only called via
      left_scroll and right_scroll.  */
-  virtual void do_scroll_horizontal (enum tui_scroll_direction,
-				     int num_to_scroll) = 0;
+  virtual void do_scroll_horizontal (int num_to_scroll) = 0;
 
 public:
 
@@ -337,8 +325,7 @@ protected:
   ~tui_source_window_base () override;
   DISABLE_COPY_AND_ASSIGN (tui_source_window_base);
 
-  void do_scroll_horizontal (enum tui_scroll_direction,
-			     int num_to_scroll) override;
+  void do_scroll_horizontal (int num_to_scroll) override;
 
 public:
 
@@ -396,8 +383,7 @@ struct tui_source_window : public tui_source_window_base
 
 protected:
 
-  void do_scroll_vertical (enum tui_scroll_direction,
-			   int num_to_scroll) override;
+  void do_scroll_vertical (int num_to_scroll) override;
 };
 
 /* A TUI disassembly window.  */
@@ -418,8 +404,7 @@ struct tui_disasm_window : public tui_source_window_base
 
 protected:
 
-  void do_scroll_vertical (enum tui_scroll_direction,
-			   int num_to_scroll) override;
+  void do_scroll_vertical (int num_to_scroll) override;
 };
 
 struct tui_data_window : public tui_win_info
@@ -457,10 +442,8 @@ struct tui_data_window : public tui_win_info
 
 protected:
 
-  void do_scroll_vertical (enum tui_scroll_direction,
-			   int num_to_scroll) override;
-  void do_scroll_horizontal (enum tui_scroll_direction,
-			     int num_to_scroll) override
+  void do_scroll_vertical (int num_to_scroll) override;
+  void do_scroll_horizontal (int num_to_scroll) override
   {
   }
 };
@@ -495,13 +478,11 @@ struct tui_cmd_window : public tui_win_info
 
 protected:
 
-  void do_scroll_vertical (enum tui_scroll_direction,
-			   int num_to_scroll) override
+  void do_scroll_vertical (int num_to_scroll) override
   {
   }
 
-  void do_scroll_horizontal (enum tui_scroll_direction,
-			     int num_to_scroll) override
+  void do_scroll_horizontal (int num_to_scroll) override
   {
   }
 };