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 /* Answer the index of the first element in line_no.  If line_no is
  68    past the data area (-1) is returned.  */
  69 int
  70 tui_first_data_element_no_in_line (int line_no)
  71 {
  72   int first_element_no = (-1);
  73
  74   /* First see if there is a register on line_no, and if so, set the
  75      first element number.  */
  76   if ((first_element_no = tui_first_reg_element_no_inline (line_no)) == -1)
  77     { /* Looking at the general data, the 1st element on line_no.  */
  78     }
  79
  80   return first_element_no;
  81 }
  82
  83
  84 /* Function to delete all the item windows in the data window.  This
  85    is usually done when the data window is scrolled.  */
  86 void
  87 tui_delete_data_content_windows (void)
  88 {
  89   int i;
  90   struct tui_gen_win_info *data_item_win_ptr;
  91
  92   for (i = 0; (i < TUI_DATA_WIN->generic.content_size); i++)
  93     {
  94       data_item_win_ptr
  95         = &TUI_DATA_WIN->generic.content[i]->which_element.data_window;
  96       tui_delete_win (data_item_win_ptr->handle);
  97       data_item_win_ptr->handle = NULL;
  98       data_item_win_ptr->is_visible = FALSE;
  99     }
 100 }
 101
 102
 103 void
 104 tui_erase_data_content (const char *prompt)
 105 {
 106   werase (TUI_DATA_WIN->generic.handle);
 107   tui_check_and_display_highlight_if_needed (TUI_DATA_WIN);
 108   if (prompt != NULL)
 109     {
 110       int half_width = (TUI_DATA_WIN->generic.width - 2) / 2;
 111       int x_pos;
 112
 113       if (strlen (prompt) >= half_width)
 114         x_pos = 1;
 115       else
 116         x_pos = half_width - strlen (prompt);
 117       mvwaddstr (TUI_DATA_WIN->generic.handle,
 118                  (TUI_DATA_WIN->generic.height / 2),
 119                  x_pos,
 120                  (char *) prompt);
 121     }
 122   wrefresh (TUI_DATA_WIN->generic.handle);
 123 }
 124
 125
 126 /* This function displays the data that is in the data window's
 127    content.  It does not set the content.  */
 128 void
 129 tui_display_all_data (void)
 130 {
 131   if (TUI_DATA_WIN->generic.content_size <= 0)
 132     tui_erase_data_content (NO_DATA_STRING);
 133   else
 134     {
 135       tui_erase_data_content (NULL);
 136       tui_delete_data_content_windows ();
 137       tui_check_and_display_highlight_if_needed (TUI_DATA_WIN);
 138       tui_display_registers_from (0);
 139
 140       /* Then display the other data.  */
 141       if (TUI_DATA_WIN->detail.data_display_info.data_content != NULL
 142           && TUI_DATA_WIN->detail.data_display_info.data_content_count > 0)
 143         {
 144         }
 145     }
 146 }
 147
 148
 149 /* Function to display the data starting at line, line_no, in the data
 150    window.  */
 151 void
 152 tui_display_data_from_line (int line_no)
 153 {
 154   int _line_no = line_no;
 155
 156   if (line_no < 0)
 157     _line_no = 0;
 158
 159   tui_check_and_display_highlight_if_needed (TUI_DATA_WIN);
 160
 161   /* There is no general data, force regs to display (if there are
 162      any).  */
 163   if (TUI_DATA_WIN->detail.data_display_info.data_content_count <= 0)
 164     tui_display_registers_from_line (_line_no, TRUE);
 165   else
 166     {
 167       int regs_last_line = tui_last_regs_line_no ();
 168
 169
 170       /* Display regs if we can.  */
 171       if (tui_display_registers_from_line (_line_no, FALSE) < 0)
 172         { /* _line_no is past the regs display, so calc where the
 173              start data element is.  */
 174           if (regs_last_line < _line_no)
 175             { /* Figure out how many lines each element is to obtain
 176                  the start element_no.  */
 177             }
 178         }
 179       else
 180         { /* Calculate the starting element of the data display, given
 181              regs_last_line and how many lines each element is, up to
 182              _line_no.  */
 183         }
 184       /* Now display the data , starting at element_no.  */
 185     }
 186 }
 187
 188
 189 /* Display data starting at element element_no.  */
 190 void
 191 tui_display_data_from (int element_no, int reuse_windows)
 192 {
 193   int first_line = (-1);
 194
 195   if (element_no < TUI_DATA_WIN->detail.data_display_info.regs_content_count)
 196     first_line = tui_line_from_reg_element_no (element_no);
 197   else
 198     { /* Calculate the first_line from the element number.  */
 199     }
 200
 201   if (first_line >= 0)
 202     {
 203       tui_erase_data_content (NULL);
 204       if (!reuse_windows)
 205         tui_delete_data_content_windows ();
 206       tui_display_data_from_line (first_line);
 207     }
 208 }
 209
 210
 211 /* Function to redisplay the contents of the data window.  */
 212 void
 213 tui_refresh_data_win (void)
 214 {
 215   tui_erase_data_content (NULL);
 216   if (TUI_DATA_WIN->generic.content_size > 0)
 217     {
 218       int first_element = tui_first_data_item_displayed ();
 219
 220       if (first_element >= 0)   /* Re-use existing windows.  */
 221         tui_display_data_from (first_element, TRUE);
 222     }
 223 }
 224
 225
 226 /* Function to check the data values and hilite any that have
 227    changed.  */
 228 void
 229 tui_check_data_values (struct frame_info *frame)
 230 {
 231   tui_check_register_values (frame);
 232
 233   /* Now check any other data values that there are.  */
 234   if (TUI_DATA_WIN != NULL && TUI_DATA_WIN->generic.is_visible)
 235     {
 236       int i;
 237
 238       for (i = 0;
 239            TUI_DATA_WIN->detail.data_display_info.data_content_count;
 240            i++)
 241         {
 242 #ifdef LATER
 243           tui_data_element_ptr data_element_ptr;
 244           struct tui_gen_win_info *data_item_win_ptr;
 245           Opaque new_value;
 246
 247           data_item_ptr = &TUI_DATA_WIN->detail.data_display_info.
 248             data_content[i]->which_element.data_window;
 249           data_element_ptr = &((tui_win_content)
 250                                data_item_win_ptr->content)[0]->which_element.data;
 251           if value
 252             has changed (data_element_ptr, frame, &new_value)
 253             {
 254               data_element_ptr->value = new_value;
 255               update the display with the newobj value, hiliting it.
 256             }
 257 #endif
 258         }
 259     }
 260 }
 261
 262
 263 /* Scroll the data window vertically forward or backward.  */
 264 void
 265 tui_vertical_data_scroll (enum tui_scroll_direction scroll_direction,
 266                           int num_to_scroll)
 267 {
 268   int first_element_no;
 269   int first_line = (-1);
 270
 271   first_element_no = tui_first_data_item_displayed ();
 272   if (first_element_no
 273       < TUI_DATA_WIN->detail.data_display_info.regs_content_count)
 274     first_line = tui_line_from_reg_element_no (first_element_no);
 275   else
 276     { /* Calculate the first line from the element number which is in
 277         the general data content.  */
 278     }
 279
 280   if (first_line >= 0)
 281     {
 282       if (scroll_direction == FORWARD_SCROLL)
 283         first_line += num_to_scroll;
 284       else
 285         first_line -= num_to_scroll;
 286       tui_erase_data_content (NULL);
 287       tui_delete_data_content_windows ();
 288       tui_display_data_from_line (first_line);
 289     }
 290 }
 291
 292
 293 /*****************************************
 294 ** STATIC LOCAL FUNCTIONS               **
 295 ******************************************/