gdb/tui/tui-windata.c

   1 /* Data/register window display.
   2
   3    Copyright (C) 1998-2019 Free Software Foundation, Inc.
   4
   5    Contributed by Hewlett-Packard Company.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "defs.h"
  23 #include "tui/tui.h"
  24 #include "tui/tui-data.h"
  25 #include "tui/tui-wingeneral.h"
  26 #include "tui/tui-regs.h"
  27 #include "tui/tui-windata.h"
  28 #include "gdb_curses.h"
  29
  30
  31 /*****************************************
  32 ** STATIC LOCAL FUNCTIONS FORWARD DECLS    **
  33 ******************************************/
  34
  35
  36
  37 /*****************************************
  38 ** PUBLIC FUNCTIONS                        **
  39 ******************************************/
  40
  41
  42 /* Answer the index first element displayed.  If none are displayed,
  43    then return (-1).  */
  44 int
  45 tui_data_window::first_data_item_displayed ()
  46 {
  47   for (int i = 0; i < regs_content.size (); i++)
  48     {
  49       struct tui_gen_win_info *data_item_win;
  50
  51       data_item_win = regs_content[i].get ();
  52       if (data_item_win->handle != NULL && data_item_win->is_visible)
  53         return i;
  54     }
  55
  56   return -1;
  57 }
  58
  59 /* See tui-data.h.  */
  60
  61 void
  62 tui_data_window::delete_data_content_windows ()
  63 {
  64   for (auto &&win : regs_content)
  65     {
  66       tui_delete_win (win->handle);
  67       win->handle = NULL;
  68       win->is_visible = false;
  69     }
  70 }
  71
  72
  73 void
  74 tui_data_window::erase_data_content (const char *prompt)
  75 {
  76   werase (handle);
  77   tui_check_and_display_highlight_if_needed (this);
  78   if (prompt != NULL)
  79     {
  80       int half_width = (width - 2) / 2;
  81       int x_pos;
  82
  83       if (strlen (prompt) >= half_width)
  84         x_pos = 1;
  85       else
  86         x_pos = half_width - strlen (prompt);
  87       mvwaddstr (handle, (height / 2), x_pos, (char *) prompt);
  88     }
  89   wrefresh (handle);
  90 }
  91
  92 /* See tui-data.h.  */
  93
  94 void
  95 tui_data_window::display_all_data ()
  96 {
  97   if (regs_content.empty ())
  98     erase_data_content (NO_DATA_STRING);
  99   else
 100     {
 101       erase_data_content (NULL);
 102       delete_data_content_windows ();
 103       tui_check_and_display_highlight_if_needed (this);
 104       display_registers_from (0);
 105     }
 106 }
 107
 108
 109 /* Function to redisplay the contents of the data window.  */
 110 void
 111 tui_data_window::refresh_all ()
 112 {
 113   erase_data_content (NULL);
 114   if (!regs_content.empty ())
 115     {
 116       int first_element = first_data_item_displayed ();
 117
 118       if (first_element >= 0)   /* Re-use existing windows.  */
 119         {
 120           int first_line = (-1);
 121
 122           if (first_element < regs_content.size ())
 123             first_line = line_from_reg_element_no (first_element);
 124
 125           if (first_line >= 0)
 126             {
 127               erase_data_content (NULL);
 128               display_registers_from_line (first_line);
 129             }
 130         }
 131     }
 132 }
 133
 134
 135 /* Scroll the data window vertically forward or backward.  */
 136 void
 137 tui_data_window::do_scroll_vertical (int num_to_scroll)
 138 {
 139   int first_element_no;
 140   int first_line = (-1);
 141
 142   first_element_no = first_data_item_displayed ();
 143   if (first_element_no < regs_content.size ())
 144     first_line = line_from_reg_element_no (first_element_no);
 145   else
 146     { /* Calculate the first line from the element number which is in
 147         the general data content.  */
 148     }
 149
 150   if (first_line >= 0)
 151     {
 152       first_line += num_to_scroll;
 153       erase_data_content (NULL);
 154       delete_data_content_windows ();
 155       display_registers_from_line (first_line);
 156     }
 157 }
 158
 159
 160 /*****************************************
 161 ** STATIC LOCAL FUNCTIONS               **
 162 ******************************************/