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_first_data_item_displayed (void)
  46 {
  47   int element_no = (-1);
  48   int i;
  49
  50   for (i = 0;
  51        i < TUI_DATA_WIN->generic.content_size && element_no < 0;
  52        i++)
  53     {
  54       struct tui_gen_win_info *data_item_win;
  55
  56       data_item_win
  57         = TUI_DATA_WIN->generic.content[i]->which_element.data_window;
  58       if (data_item_win->handle != NULL
  59           && data_item_win->is_visible)
  60         element_no = i;
  61     }
  62
  63   return element_no;
  64 }
  65
  66
  67 /* Function to delete all the item windows in the data window.  This
  68    is usually done when the data window is scrolled.  */
  69 void
  70 tui_delete_data_content_windows (void)
  71 {
  72   int i;
  73   struct tui_gen_win_info *data_item_win_ptr;
  74
  75   for (i = 0; (i < TUI_DATA_WIN->generic.content_size); i++)
  76     {
  77       data_item_win_ptr
  78         = TUI_DATA_WIN->generic.content[i]->which_element.data_window;
  79       tui_delete_win (data_item_win_ptr->handle);
  80       data_item_win_ptr->handle = NULL;
  81       data_item_win_ptr->is_visible = false;
  82     }
  83 }
  84
  85
  86 void
  87 tui_erase_data_content (const char *prompt)
  88 {
  89   werase (TUI_DATA_WIN->generic.handle);
  90   tui_check_and_display_highlight_if_needed (TUI_DATA_WIN);
  91   if (prompt != NULL)
  92     {
  93       int half_width = (TUI_DATA_WIN->generic.width - 2) / 2;
  94       int x_pos;
  95
  96       if (strlen (prompt) >= half_width)
  97         x_pos = 1;
  98       else
  99         x_pos = half_width - strlen (prompt);
 100       mvwaddstr (TUI_DATA_WIN->generic.handle,
 101                  (TUI_DATA_WIN->generic.height / 2),
 102                  x_pos,
 103                  (char *) prompt);
 104     }
 105   wrefresh (TUI_DATA_WIN->generic.handle);
 106 }
 107
 108
 109 /* This function displays the data that is in the data window's
 110    content.  It does not set the content.  */
 111 void
 112 tui_display_all_data (void)
 113 {
 114   if (TUI_DATA_WIN->generic.content_size <= 0)
 115     tui_erase_data_content (NO_DATA_STRING);
 116   else
 117     {
 118       tui_erase_data_content (NULL);
 119       tui_delete_data_content_windows ();
 120       tui_check_and_display_highlight_if_needed (TUI_DATA_WIN);
 121       tui_display_registers_from (0);
 122
 123       /* Then display the other data.  */
 124       if (TUI_DATA_WIN->data_content != NULL
 125           && TUI_DATA_WIN->data_content_count > 0)
 126         {
 127         }
 128     }
 129 }
 130
 131
 132 /* Function to display the data starting at line, line_no, in the data
 133    window.  */
 134 void
 135 tui_display_data_from_line (int line_no)
 136 {
 137   int _line_no = line_no;
 138
 139   if (line_no < 0)
 140     _line_no = 0;
 141
 142   tui_check_and_display_highlight_if_needed (TUI_DATA_WIN);
 143
 144   /* There is no general data, force regs to display (if there are
 145      any).  */
 146   if (TUI_DATA_WIN->data_content_count <= 0)
 147     tui_display_registers_from_line (_line_no, TRUE);
 148   else
 149     {
 150       int regs_last_line = tui_last_regs_line_no ();
 151
 152
 153       /* Display regs if we can.  */
 154       if (tui_display_registers_from_line (_line_no, FALSE) < 0)
 155         { /* _line_no is past the regs display, so calc where the
 156              start data element is.  */
 157           if (regs_last_line < _line_no)
 158             { /* Figure out how many lines each element is to obtain
 159                  the start element_no.  */
 160             }
 161         }
 162       else
 163         { /* Calculate the starting element of the data display, given
 164              regs_last_line and how many lines each element is, up to
 165              _line_no.  */
 166         }
 167       /* Now display the data , starting at element_no.  */
 168     }
 169 }
 170
 171
 172 /* Display data starting at element element_no.  */
 173 void
 174 tui_display_data_from (int element_no, int reuse_windows)
 175 {
 176   int first_line = (-1);
 177
 178   if (element_no < TUI_DATA_WIN->regs_content_count)
 179     first_line = tui_line_from_reg_element_no (element_no);
 180   else
 181     { /* Calculate the first_line from the element number.  */
 182     }
 183
 184   if (first_line >= 0)
 185     {
 186       tui_erase_data_content (NULL);
 187       if (!reuse_windows)
 188         tui_delete_data_content_windows ();
 189       tui_display_data_from_line (first_line);
 190     }
 191 }
 192
 193
 194 /* Function to redisplay the contents of the data window.  */
 195 void
 196 tui_data_window::refresh_all ()
 197 {
 198   tui_erase_data_content (NULL);
 199   if (generic.content_size > 0)
 200     {
 201       int first_element = tui_first_data_item_displayed ();
 202
 203       if (first_element >= 0)   /* Re-use existing windows.  */
 204         tui_display_data_from (first_element, TRUE);
 205     }
 206 }
 207
 208
 209 /* Function to check the data values and hilite any that have
 210    changed.  */
 211 void
 212 tui_check_data_values (struct frame_info *frame)
 213 {
 214   tui_check_register_values (frame);
 215
 216   /* Now check any other data values that there are.  */
 217   if (TUI_DATA_WIN != NULL && TUI_DATA_WIN->generic.is_visible)
 218     {
 219       int i;
 220
 221       for (i = 0; TUI_DATA_WIN->data_content_count; i++)
 222         {
 223 #ifdef LATER
 224           tui_data_element_ptr data_element_ptr;
 225           struct tui_gen_win_info *data_item_win_ptr;
 226           Opaque new_value;
 227
 228           data_item_ptr = &TUI_DATA_WIN->
 229             data_content[i]->which_element.data_window;
 230           data_element_ptr = &((tui_win_content)
 231                                data_item_win_ptr->content)[0]->which_element.data;
 232           if value
 233             has changed (data_element_ptr, frame, &new_value)
 234             {
 235               data_element_ptr->value = new_value;
 236               update the display with the newobj value, hiliting it.
 237             }
 238 #endif
 239         }
 240     }
 241 }
 242
 243
 244 /* Scroll the data window vertically forward or backward.  */
 245 void
 246 tui_data_window::do_scroll_vertical
 247   (enum tui_scroll_direction scroll_direction, int num_to_scroll)
 248 {
 249   int first_element_no;
 250   int first_line = (-1);
 251
 252   first_element_no = tui_first_data_item_displayed ();
 253   if (first_element_no < regs_content_count)
 254     first_line = tui_line_from_reg_element_no (first_element_no);
 255   else
 256     { /* Calculate the first line from the element number which is in
 257         the general data content.  */
 258     }
 259
 260   if (first_line >= 0)
 261     {
 262       if (scroll_direction == FORWARD_SCROLL)
 263         first_line += num_to_scroll;
 264       else
 265         first_line -= num_to_scroll;
 266       tui_erase_data_content (NULL);
 267       tui_delete_data_content_windows ();
 268       tui_display_data_from_line (first_line);
 269     }
 270 }
 271
 272
 273 /*****************************************
 274 ** STATIC LOCAL FUNCTIONS               **
 275 ******************************************/