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/* Data/register window display.

   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008

   Free Software Foundation, Inc.

   Contributed by Hewlett-Packard Company.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"

#include "tui/tui.h"

#include "tui/tui-data.h"

#include "tui/tui-wingeneral.h"

#include "tui/tui-regs.h"

#include "gdb_string.h"

#include "gdb_curses.h"

/*****************************************

** STATIC LOCAL FUNCTIONS FORWARD DECLS    **

******************************************/

/*****************************************

** PUBLIC FUNCTIONS                        **

******************************************/

/* Answer the index first element displayed.  If none are displayed,

   then return (-1).  */

int

tui_first_data_item_displayed (void)

{

  int element_no = (-1);

  int i;

  for (i = 0;

       i < TUI_DATA_WIN->generic.content_size && element_no < 0;

       i++)

    {

      struct tui_gen_win_info *data_item_win;

      data_item_win = &((tui_win_content)

                        TUI_DATA_WIN->generic.content)[i]->which_element.data_window;

      if (data_item_win->handle != (WINDOW *) NULL

          && data_item_win->is_visible)

        element_no = i;

    }

  return element_no;

}

/* Answer the index of the first element in line_no.  If line_no is

   past the data area (-1) is returned.  */

int

tui_first_data_element_no_in_line (int line_no)

{

  int first_element_no = (-1);

  /* First see if there is a register on line_no, and if so, set the

     first element number.  */

  if ((first_element_no = tui_first_reg_element_no_inline (line_no)) == -1)

    { /* Looking at the general data, the 1st element on line_no.  */

    }

  return first_element_no;

}

/* Function to delete all the item windows in the data window.  This

   is usually done when the data window is scrolled.  */

void

tui_delete_data_content_windows (void)

{

  int i;

  struct tui_gen_win_info *data_item_win_ptr;

  for (i = 0; (i < TUI_DATA_WIN->generic.content_size); i++)

    {

      data_item_win_ptr = &((tui_win_content)

                            TUI_DATA_WIN->generic.content)[i]->which_element.data_window;

      tui_delete_win (data_item_win_ptr->handle);

      data_item_win_ptr->handle = (WINDOW *) NULL;

      data_item_win_ptr->is_visible = FALSE;

    }

}

void

tui_erase_data_content (char *prompt)

{

  werase (TUI_DATA_WIN->generic.handle);

  tui_check_and_display_highlight_if_needed (TUI_DATA_WIN);

  if (prompt != (char *) NULL)

    {

      int half_width = (TUI_DATA_WIN->generic.width - 2) / 2;

      int x_pos;

      if (strlen (prompt) >= half_width)

        x_pos = 1;

      else

        x_pos = half_width - strlen (prompt);

      mvwaddstr (TUI_DATA_WIN->generic.handle,

                 (TUI_DATA_WIN->generic.height / 2),

                 x_pos,

                 prompt);

    }

  wrefresh (TUI_DATA_WIN->generic.handle);

}

/* This function displays the data that is in the data window's

   content.  It does not set the content.  */

void

tui_display_all_data (void)

{

  if (TUI_DATA_WIN->generic.content_size <= 0)

    tui_erase_data_content (NO_DATA_STRING);

  else

    {

      tui_erase_data_content ((char *) NULL);

      tui_delete_data_content_windows ();

      tui_check_and_display_highlight_if_needed (TUI_DATA_WIN);

      tui_display_registers_from (0);

      /* Then display the other data.  */

      if (TUI_DATA_WIN->detail.data_display_info.data_content !=

          (tui_win_content) NULL

          && TUI_DATA_WIN->detail.data_display_info.data_content_count > 0)

        {

        }

    }

}

/* Function to display the data starting at line, line_no, in the data

   window.  */

void

tui_display_data_from_line (int line_no)

{

  int _line_no = line_no;

  if (line_no < 0)

    _line_no = 0;

  tui_check_and_display_highlight_if_needed (TUI_DATA_WIN);

  /* There is no general data, force regs to display (if there are

     any).  */

  if (TUI_DATA_WIN->detail.data_display_info.data_content_count <= 0)

    tui_display_registers_from_line (_line_no, TRUE);

  else

    {

      int element_no, start_line_no;

      int regs_last_line = tui_last_regs_line_no ();

      /* Display regs if we can.  */

      if (tui_display_registers_from_line (_line_no, FALSE) < 0)

        { /* _line_no is past the regs display, so calc where the

             start data element is.  */

          if (regs_last_line < _line_no)

            { /* Figure out how many lines each element is to obtain

                 the start element_no.  */

            }

        }

      else

        { /* Calculate the starting element of the data display, given

             regs_last_line and how many lines each element is, up to

             _line_no.  */

        }

      /* Now display the data , starting at element_no.  */

    }

}

/* Display data starting at element element_no.  */

void

tui_display_data_from (int element_no, int reuse_windows)

{

  int first_line = (-1);

  if (element_no < TUI_DATA_WIN->detail.data_display_info.regs_content_count)

    first_line = tui_line_from_reg_element_no (element_no);

  else

    { /* Calculate the first_line from the element number.  */

    }

  if (first_line >= 0)

    {

      tui_erase_data_content ((char *) NULL);

      if (!reuse_windows)

        tui_delete_data_content_windows ();

      tui_display_data_from_line (first_line);

    }

}

/* Function to redisplay the contents of the data window.  */

void

tui_refresh_data_win (void)

{

  tui_erase_data_content ((char *) NULL);

  if (TUI_DATA_WIN->generic.content_size > 0)

    {

      int first_element = tui_first_data_item_displayed ();

      if (first_element >= 0)    /* Re-use existing windows.  */

        tui_display_data_from (first_element, TRUE);

    }

}

/* Function to check the data values and hilite any that have

   changed.  */

void

tui_check_data_values (struct frame_info *frame)

{

  tui_check_register_values (frame);

  /* Now check any other data values that there are.  */

  if (TUI_DATA_WIN != NULL && TUI_DATA_WIN->generic.is_visible)

    {

      int i;

      for (i = 0;

           TUI_DATA_WIN->detail.data_display_info.data_content_count;

           i++)

        {

#ifdef LATER

          tui_data_element_ptr data_element_ptr;

          struct tui_gen_win_info *data_item_win_ptr;

          Opaque new_value;

          data_item_ptr = &TUI_DATA_WIN->detail.data_display_info.

            data_content[i]->which_element.data_window;

          data_element_ptr = &((tui_win_content)

                             data_item_win_ptr->content)[0]->which_element.data;

          if value

            has changed (data_element_ptr, frame, &new_value)

            {

              data_element_ptr->value = new_value;

              update the display with the new value, hiliting it.

            }

#endif

        }

    }

}

/* Scroll the data window vertically forward or backward.  */

void

tui_vertical_data_scroll (enum tui_scroll_direction scroll_direction,

                          int num_to_scroll)

{

  int first_element_no;

  int first_line = (-1);

  first_element_no = tui_first_data_item_displayed ();

  if (first_element_no < TUI_DATA_WIN->detail.data_display_info.regs_content_count)

    first_line = tui_line_from_reg_element_no (first_element_no);

  else

    { /* Calculate the first line from the element number which is in

        the general data content.  */

    }

  if (first_line >= 0)

    {

      int last_element_no, last_line;

      if (scroll_direction == FORWARD_SCROLL)

        first_line += num_to_scroll;

      else

        first_line -= num_to_scroll;

      tui_erase_data_content ((char *) NULL);

      tui_delete_data_content_windows ();

      tui_display_data_from_line (first_line);

    }

}

/*****************************************

** STATIC LOCAL FUNCTIONS               **

******************************************/