[PATCH 16/61] Introduce tui_data_window::display_reg_element_at_line method

[Tom Tromey <tom@tromey.com>]

This changes tui_display_reg_element_at_line to be a method on
tui_data_window, allowing for the removal of some uses of the
TUI_DATA_WIN global.

2019-07-04  Tom Tromey  <tom@tromey.com>

	* tui/tui-regs.c (tui_data_window::display_reg_element_at_line):
	Rename from tui_display_reg_element_at_line.
	(tui_data_window::display_registers_from_line): Update.
	* tui/tui-data.h (struct tui_data_window)
	<display_reg_element_at_line>: New method.
---
 gdb/ChangeLog      |  8 ++++++++
 gdb/tui/tui-data.h |  7 +++++++
 gdb/tui/tui-regs.c | 21 +++++++++------------
 3 files changed, 24 insertions(+), 12 deletions(-)

diff --git a/gdb/tui/tui-data.h b/gdb/tui/tui-data.h
index e5b4b0f6aa0..b3592e39133 100644
--- a/gdb/tui/tui-data.h
+++ b/gdb/tui/tui-data.h
@@ -535,6 +535,13 @@ protected:
   /* Return the index of the first element displayed.  If none are
      displayed, then return -1.  */
   int first_data_item_displayed ();
+
+  /* Function to display the registers in the content from
+     'start_element_no' on 'start_line_no' until the end of the
+     register content or the end of the display height.  This function
+     checks that we won't display off the end of the register
+     display.  */
+  void display_reg_element_at_line (int start_element_no, int start_line_no);
 };
 
 struct tui_cmd_window : public tui_win_info
diff --git a/gdb/tui/tui-regs.c b/gdb/tui/tui-regs.c
index 042563f0495..eea8cf45acf 100644
--- a/gdb/tui/tui-regs.c
+++ b/gdb/tui/tui-regs.c
@@ -333,11 +333,11 @@ tui_data_window::display_registers_from (int start_element_no)
    'start_element_no' on 'start_line_no' until the end of the register
    content or the end of the display height.  This function checks
    that we won't display off the end of the register display.  */
-static void
-tui_display_reg_element_at_line (int start_element_no,
-				 int start_line_no)
+void
+tui_data_window::display_reg_element_at_line (int start_element_no,
+					      int start_line_no)
 {
-  if (!TUI_DATA_WIN->regs_content.empty ())
+  if (!regs_content.empty ())
     {
       int element_no = start_element_no;
 
@@ -345,9 +345,8 @@ tui_display_reg_element_at_line (int start_element_no,
 	{
 	  int last_line_no, first_line_on_last_page;
 
-	  last_line_no = TUI_DATA_WIN->last_regs_line_no ();
-	  first_line_on_last_page
-	    = last_line_no - (TUI_DATA_WIN->height - 2);
+	  last_line_no = last_regs_line_no ();
+	  first_line_on_last_page = last_line_no - (height - 2);
 	  if (first_line_on_last_page < 0)
 	    first_line_on_last_page = 0;
 
@@ -355,11 +354,9 @@ tui_display_reg_element_at_line (int start_element_no,
 	     registers, adjust what element to really start the
 	     display at.  */
 	  if (start_line_no > first_line_on_last_page)
-	    element_no
-	      = (TUI_DATA_WIN->first_reg_element_no_inline
-		 (first_line_on_last_page));
+	    element_no = first_reg_element_no_inline (first_line_on_last_page);
 	}
-      TUI_DATA_WIN->display_registers_from (element_no);
+      display_registers_from (element_no);
     }
 }
 
@@ -392,7 +389,7 @@ tui_data_window::display_registers_from_line (int line_no)
 
       element_no = first_reg_element_no_inline (line_no);
       if (element_no < regs_content.size ())
-	tui_display_reg_element_at_line (element_no, line_no);
+	display_reg_element_at_line (element_no, line_no);
       else
 	line_no = (-1);
 
-- 
2.17.2