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
  60 /* Function to delete all the item windows in the data window.  This
  61    is usually done when the data window is scrolled.  */
  62 void
  63 tui_delete_data_content_windows (void)
  64 {
  65   for (auto &&win : TUI_DATA_WIN->regs_content)
  66     {
  67       tui_delete_win (win->handle);
  68       win->handle = NULL;
  69       win->is_visible = false;
  70     }
  71 }
  72
  73
  74 void
  75 tui_erase_data_content (const char *prompt)
  76 {
  77   werase (TUI_DATA_WIN->handle);
  78   tui_check_and_display_highlight_if_needed (TUI_DATA_WIN);
  79   if (prompt != NULL)
  80     {
  81       int half_width = (TUI_DATA_WIN->width - 2) / 2;
  82       int x_pos;
  83
  84       if (strlen (prompt) >= half_width)
  85         x_pos = 1;
  86       else
  87         x_pos = half_width - strlen (prompt);
  88       mvwaddstr (TUI_DATA_WIN->handle,
  89                  (TUI_DATA_WIN->height / 2),
  90                  x_pos,
  91                  (char *) prompt);
  92     }
  93   wrefresh (TUI_DATA_WIN->handle);
  94 }
  95
  96
  97 /* This function displays the data that is in the data window's
  98    content.  It does not set the content.  */
  99 void
 100 tui_display_all_data (void)
 101 {
 102   if (TUI_DATA_WIN->regs_content.empty ())
 103     tui_erase_data_content (NO_DATA_STRING);
 104   else
 105     {
 106       tui_erase_data_content (NULL);
 107       tui_delete_data_content_windows ();
 108       tui_check_and_display_highlight_if_needed (TUI_DATA_WIN);
 109       tui_display_registers_from (0);
 110     }
 111 }
 112
 113
 114 /* Function to display the data starting at line, line_no, in the data
 115    window.  */
 116 void
 117 tui_display_data_from_line (int line_no)
 118 {
 119   int _line_no = line_no;
 120
 121   if (line_no < 0)
 122     _line_no = 0;
 123
 124   tui_check_and_display_highlight_if_needed (TUI_DATA_WIN);
 125
 126   tui_display_registers_from_line (_line_no, TRUE);
 127 }
 128
 129
 130 /* Display data starting at element element_no.  */
 131 void
 132 tui_display_data_from (int element_no, int reuse_windows)
 133 {
 134   int first_line = (-1);
 135
 136   if (element_no < TUI_DATA_WIN->regs_content.size ())
 137     first_line = tui_line_from_reg_element_no (element_no);
 138   else
 139     { /* Calculate the first_line from the element number.  */
 140     }
 141
 142   if (first_line >= 0)
 143     {
 144       tui_erase_data_content (NULL);
 145       if (!reuse_windows)
 146         tui_delete_data_content_windows ();
 147       tui_display_data_from_line (first_line);
 148     }
 149 }
 150
 151
 152 /* Function to redisplay the contents of the data window.  */
 153 void
 154 tui_data_window::refresh_all ()
 155 {
 156   tui_erase_data_content (NULL);
 157   if (!regs_content.empty ())
 158     {
 159       int first_element = first_data_item_displayed ();
 160
 161       if (first_element >= 0)   /* Re-use existing windows.  */
 162         tui_display_data_from (first_element, TRUE);
 163     }
 164 }
 165
 166
 167 /* Scroll the data window vertically forward or backward.  */
 168 void
 169 tui_data_window::do_scroll_vertical (int num_to_scroll)
 170 {
 171   int first_element_no;
 172   int first_line = (-1);
 173
 174   first_element_no = first_data_item_displayed ();
 175   if (first_element_no < regs_content.size ())
 176     first_line = tui_line_from_reg_element_no (first_element_no);
 177   else
 178     { /* Calculate the first line from the element number which is in
 179         the general data content.  */
 180     }
 181
 182   if (first_line >= 0)
 183     {
 184       first_line += num_to_scroll;
 185       tui_erase_data_content (NULL);
 186       tui_delete_data_content_windows ();
 187       tui_display_data_from_line (first_line);
 188     }
 189 }
 190
 191
 192 /*****************************************
 193 ** STATIC LOCAL FUNCTIONS               **
 194 ******************************************/