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/* TUI display source/assembly window.

   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006, 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 <ctype.h>

#include "symtab.h"

#include "frame.h"

#include "breakpoint.h"

#include "value.h"

#include "source.h"

#include "tui/tui.h"

#include "tui/tui-data.h"

#include "tui/tui-stack.h"

#include "tui/tui-win.h"

#include "tui/tui-wingeneral.h"

#include "tui/tui-winsource.h"

#include "tui/tui-source.h"

#include "tui/tui-disasm.h"

#include "gdb_string.h"

#include "gdb_curses.h"

#include "gdb_assert.h"

/* Function to display the "main" routine.  */

void

tui_display_main (void)

{

  if ((tui_source_windows ())->count > 0)

    {

      CORE_ADDR addr;

      addr = tui_get_begin_asm_address ();

      if (addr != (CORE_ADDR) 0)

        {

          struct symtab_and_line sal;

          tui_update_source_windows_with_addr (addr);

          sal = find_pc_line (addr, 0);

          if (sal.symtab)

             tui_update_locator_filename (sal.symtab->filename);

          else

             tui_update_locator_filename ("??");

        }

    }

}

/* Function to display source in the source window.  This function

   initializes the horizontal scroll to 0.  */

void

tui_update_source_window (struct tui_win_info *win_info,

                          struct symtab *s,

                          struct tui_line_or_address line_or_addr,

                          int noerror)

{

  win_info->detail.source_info.horizontal_offset = 0;

  tui_update_source_window_as_is (win_info, s, line_or_addr, noerror);

  return;

}

/* Function to display source in the source/asm window.  This function

   shows the source as specified by the horizontal offset.  */

void

tui_update_source_window_as_is (struct tui_win_info *win_info,

                                struct symtab *s,

                                struct tui_line_or_address line_or_addr,

                                int noerror)

{

  enum tui_status ret;

  if (win_info->generic.type == SRC_WIN)

    ret = tui_set_source_content (s, line_or_addr.u.line_no, noerror);

  else

    ret = tui_set_disassem_content (line_or_addr.u.addr);

  if (ret == TUI_FAILURE)

    {

      tui_clear_source_content (win_info, EMPTY_SOURCE_PROMPT);

      tui_clear_exec_info_content (win_info);

    }

  else

    {

      tui_update_breakpoint_info (win_info, 0);

      tui_show_source_content (win_info);

      tui_update_exec_info (win_info);

      if (win_info->generic.type == SRC_WIN)

        {

          struct symtab_and_line sal;

          sal.line = line_or_addr.u.line_no +

            (win_info->generic.content_size - 2);

          sal.symtab = s;

          set_current_source_symtab_and_line (&sal);

          /* If the focus was in the asm win, put it in the src win if

             we don't have a split layout.  */

          if (tui_win_with_focus () == TUI_DISASM_WIN

              && tui_current_layout () != SRC_DISASSEM_COMMAND)

            tui_set_win_focus_to (TUI_SRC_WIN);

        }

    }

  return;

}

/* Function to ensure that the source and/or disassemly windows

   reflect the input address.  */

void

tui_update_source_windows_with_addr (CORE_ADDR addr)

{

  if (addr != 0)

    {

      struct symtab_and_line sal;

      struct tui_line_or_address l;

      switch (tui_current_layout ())

        {

        case DISASSEM_COMMAND:

        case DISASSEM_DATA_COMMAND:

          tui_show_disassem (addr);

          break;

        case SRC_DISASSEM_COMMAND:

          tui_show_disassem_and_update_source (addr);

          break;

        default:

          sal = find_pc_line (addr, 0);

          l.loa = LOA_LINE;

          l.u.line_no = sal.line;

          tui_show_symtab_source (sal.symtab, l, FALSE);

          break;

        }

    }

  else

    {

      int i;

      for (i = 0; i < (tui_source_windows ())->count; i++)

        {

          struct tui_win_info *win_info = (tui_source_windows ())->list[i];

          tui_clear_source_content (win_info, EMPTY_SOURCE_PROMPT);

          tui_clear_exec_info_content (win_info);

        }

    }

}

/* Function to ensure that the source and/or disassemly windows

   reflect the input address.  */

void

tui_update_source_windows_with_line (struct symtab *s, int line)

{

  CORE_ADDR pc;

  struct tui_line_or_address l;

  switch (tui_current_layout ())

    {

    case DISASSEM_COMMAND:

    case DISASSEM_DATA_COMMAND:

      find_line_pc (s, line, &pc);

      tui_update_source_windows_with_addr (pc);

      break;

    default:

      l.loa = LOA_LINE;

      l.u.line_no = line;

      tui_show_symtab_source (s, l, FALSE);

      if (tui_current_layout () == SRC_DISASSEM_COMMAND)

        {

          find_line_pc (s, line, &pc);

          tui_show_disassem (pc);

        }

      break;

    }

  return;

}

void

tui_clear_source_content (struct tui_win_info *win_info,

                          int display_prompt)

{

  if (win_info != NULL)

    {

      int i;

      win_info->generic.content_in_use = FALSE;

      tui_erase_source_content (win_info, display_prompt);

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

        {

          struct tui_win_element *element =

          (struct tui_win_element *) win_info->generic.content[i];

          element->which_element.source.has_break = FALSE;

          element->which_element.source.is_exec_point = FALSE;

        }

    }

}

void

tui_erase_source_content (struct tui_win_info *win_info,

                          int display_prompt)

{

  int x_pos;

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

  if (win_info->generic.handle != (WINDOW *) NULL)

    {

      werase (win_info->generic.handle);

      tui_check_and_display_highlight_if_needed (win_info);

      if (display_prompt == EMPTY_SOURCE_PROMPT)

        {

          char *no_src_str;

          if (win_info->generic.type == SRC_WIN)

            no_src_str = NO_SRC_STRING;

          else

            no_src_str = NO_DISASSEM_STRING;

          if (strlen (no_src_str) >= half_width)

            x_pos = 1;

          else

            x_pos = half_width - strlen (no_src_str);

          mvwaddstr (win_info->generic.handle,

                     (win_info->generic.height / 2),

                     x_pos,

                     no_src_str);

          /* elz: Added this function call to set the real contents of

             the window to what is on the screen, so that later calls

             to refresh, do display the correct stuff, and not the old

             image.  */

          tui_set_source_content_nil (win_info, no_src_str);

        }

      tui_refresh_win (&win_info->generic);

    }

}

/* Redraw the complete line of a source or disassembly window.  */

static void

tui_show_source_line (struct tui_win_info *win_info, int lineno)

{

  struct tui_win_element *line;

  int x, y;

  line = (struct tui_win_element *) win_info->generic.content[lineno - 1];

  if (line->which_element.source.is_exec_point)

    wattron (win_info->generic.handle, A_STANDOUT);

  mvwaddstr (win_info->generic.handle, lineno, 1,

             line->which_element.source.line);

  if (line->which_element.source.is_exec_point)

    wattroff (win_info->generic.handle, A_STANDOUT);

  /* Clear to end of line but stop before the border.  */

  getyx (win_info->generic.handle, y, x);

  while (x + 1 < win_info->generic.width)

    {

      waddch (win_info->generic.handle, ' ');

      getyx (win_info->generic.handle, y, x);

    }

}

void

tui_show_source_content (struct tui_win_info *win_info)

{

  if (win_info->generic.content_size > 0)

    {

      int lineno;

      for (lineno = 1; lineno <= win_info->generic.content_size; lineno++)

        tui_show_source_line (win_info, lineno);

    }

  else

    tui_erase_source_content (win_info, TRUE);

  tui_check_and_display_highlight_if_needed (win_info);

  tui_refresh_win (&win_info->generic);

  win_info->generic.content_in_use = TRUE;

}

/* Scroll the source forward or backward horizontally.  */

void

tui_horizontal_source_scroll (struct tui_win_info *win_info,

                              enum tui_scroll_direction direction,

                              int num_to_scroll)

{

  if (win_info->generic.content != NULL)

    {

      int offset;

      struct symtab *s;

      struct symtab_and_line cursal = get_current_source_symtab_and_line ();

      if (cursal.symtab == (struct symtab *) NULL)

        s = find_pc_symtab (get_frame_pc (get_selected_frame (NULL)));

      else

        s = cursal.symtab;

      if (direction == LEFT_SCROLL)

        offset = win_info->detail.source_info.horizontal_offset + num_to_scroll;

      else

        {

          if ((offset =

             win_info->detail.source_info.horizontal_offset - num_to_scroll) < 0)

            offset = 0;

        }

      win_info->detail.source_info.horizontal_offset = offset;

      tui_update_source_window_as_is (win_info, s,

                                      ((struct tui_win_element *)

                                       win_info->generic.content[0])->which_element.source.line_or_addr,

                                      FALSE);

    }

  return;

}

/* Set or clear the has_break flag in the line whose line is

   line_no.  */

void

tui_set_is_exec_point_at (struct tui_line_or_address l,

                          struct tui_win_info *win_info)

{

  int changed = 0;

  int i;

  tui_win_content content = (tui_win_content) win_info->generic.content;

  i = 0;

  while (i < win_info->generic.content_size)

    {

      int new_state;

      struct tui_line_or_address content_loa =

        content[i]->which_element.source.line_or_addr;

      gdb_assert (l.loa == LOA_ADDRESS || l.loa == LOA_LINE);

      gdb_assert (content_loa.loa == LOA_LINE

                  || content_loa.loa == LOA_ADDRESS);

      if (content_loa.loa == l.loa

          && ((l.loa == LOA_LINE && content_loa.u.line_no == l.u.line_no)

              || (content_loa.u.addr == l.u.addr)))

        new_state = TRUE;

      else

        new_state = FALSE;

      if (new_state != content[i]->which_element.source.is_exec_point)

        {

          changed++;

          content[i]->which_element.source.is_exec_point = new_state;

          tui_show_source_line (win_info, i + 1);

        }

      i++;

    }

  if (changed)

    tui_refresh_win (&win_info->generic);

}

/* Update the execution windows to show the active breakpoints.

   This is called whenever a breakpoint is inserted, removed or

   has its state changed.  */

void

tui_update_all_breakpoint_info (void)

{

  struct tui_list *list = tui_source_windows ();

  int i;

  for (i = 0; i < list->count; i++)

    {

      struct tui_win_info *win = list->list[i];

      if (tui_update_breakpoint_info (win, FALSE))

        {

          tui_update_exec_info (win);

        }

    }

}

/* Scan the source window and the breakpoints to update the has_break

   information for each line.

   Returns 1 if something changed and the execution window must be

   refreshed.  */

int

tui_update_breakpoint_info (struct tui_win_info *win,

                            int current_only)

{

  int i;

  int need_refresh = 0;

  struct tui_source_info *src = &win->detail.source_info;

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

    {

      struct breakpoint *bp;

      extern struct breakpoint *breakpoint_chain;

      int mode;

      struct tui_source_element *line;

      line = &((struct tui_win_element *) win->generic.content[i])->which_element.source;

      if (current_only && !line->is_exec_point)

         continue;

      /* Scan each breakpoint to see if the current line has something to

         do with it.  Identify enable/disabled breakpoints as well as

         those that we already hit.  */

      mode = 0;

      for (bp = breakpoint_chain;

           bp != (struct breakpoint *) NULL;

           bp = bp->next)

        {

          gdb_assert (line->line_or_addr.loa == LOA_LINE

                      || line->line_or_addr.loa == LOA_ADDRESS);

          if ((win == TUI_SRC_WIN

               && bp->source_file

               && (strcmp (src->filename, bp->source_file) == 0)

               && line->line_or_addr.loa == LOA_LINE

               && bp->line_number == line->line_or_addr.u.line_no)

              || (win == TUI_DISASM_WIN

                  && line->line_or_addr.loa == LOA_ADDRESS

                  && bp->loc->address == line->line_or_addr.u.addr))

            {

              if (bp->enable_state == bp_disabled)

                mode |= TUI_BP_DISABLED;

              else

                mode |= TUI_BP_ENABLED;

              if (bp->hit_count)

                mode |= TUI_BP_HIT;

              if (bp->loc->cond)

                mode |= TUI_BP_CONDITIONAL;

              if (bp->type == bp_hardware_breakpoint)

                mode |= TUI_BP_HARDWARE;

            }

        }

      if (line->has_break != mode)

        {

          line->has_break = mode;

          need_refresh = 1;

        }

    }

  return need_refresh;

}

/* Function to initialize the content of the execution info window,

   based upon the input window which is either the source or

   disassembly window.  */

enum tui_status

tui_set_exec_info_content (struct tui_win_info *win_info)

{

  enum tui_status ret = TUI_SUCCESS;

  if (win_info->detail.source_info.execution_info != (struct tui_gen_win_info *) NULL)

    {

      struct tui_gen_win_info *exec_info_ptr = win_info->detail.source_info.execution_info;

      if (exec_info_ptr->content == NULL)

        exec_info_ptr->content =

          (void **) tui_alloc_content (win_info->generic.height,

                                         exec_info_ptr->type);

      if (exec_info_ptr->content != NULL)

        {

          int i;

          tui_update_breakpoint_info (win_info, 1);

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

            {

              struct tui_win_element *element;

              struct tui_win_element *src_element;

              int mode;

              element = (struct tui_win_element *) exec_info_ptr->content[i];

              src_element = (struct tui_win_element *) win_info->generic.content[i];

              memset(element->which_element.simple_string, ' ',

                     sizeof(element->which_element.simple_string));

              element->which_element.simple_string[TUI_EXECINFO_SIZE - 1] = 0;

              /* Now update the exec info content based upon the state

                 of each line as indicated by the source content.  */

              mode = src_element->which_element.source.has_break;

              if (mode & TUI_BP_HIT)

                element->which_element.simple_string[TUI_BP_HIT_POS] =

                  (mode & TUI_BP_HARDWARE) ? 'H' : 'B';

              else if (mode & (TUI_BP_ENABLED | TUI_BP_DISABLED))

                element->which_element.simple_string[TUI_BP_HIT_POS] =

                  (mode & TUI_BP_HARDWARE) ? 'h' : 'b';

              if (mode & TUI_BP_ENABLED)

                element->which_element.simple_string[TUI_BP_BREAK_POS] = '+';

              else if (mode & TUI_BP_DISABLED)

                element->which_element.simple_string[TUI_BP_BREAK_POS] = '-';

              if (src_element->which_element.source.is_exec_point)

                element->which_element.simple_string[TUI_EXEC_POS] = '>';

            }

          exec_info_ptr->content_size = win_info->generic.content_size;

        }

      else

        ret = TUI_FAILURE;

    }

  return ret;

}

void

tui_show_exec_info_content (struct tui_win_info *win_info)

{

  struct tui_gen_win_info *exec_info = win_info->detail.source_info.execution_info;

  int cur_line;

  werase (exec_info->handle);

  tui_refresh_win (exec_info);

  for (cur_line = 1; (cur_line <= exec_info->content_size); cur_line++)

    mvwaddstr (exec_info->handle,

               cur_line,

               0,

               ((struct tui_win_element *)

                exec_info->content[cur_line - 1])->which_element.simple_string);

  tui_refresh_win (exec_info);

  exec_info->content_in_use = TRUE;

}

void

tui_erase_exec_info_content (struct tui_win_info *win_info)

{

  struct tui_gen_win_info *exec_info = win_info->detail.source_info.execution_info;

  werase (exec_info->handle);

  tui_refresh_win (exec_info);

}

void

tui_clear_exec_info_content (struct tui_win_info *win_info)

{

  win_info->detail.source_info.execution_info->content_in_use = FALSE;

  tui_erase_exec_info_content (win_info);

  return;

}

/* Function to update the execution info window.  */

void

tui_update_exec_info (struct tui_win_info *win_info)

{

  tui_set_exec_info_content (win_info);

  tui_show_exec_info_content (win_info);

}

enum tui_status

tui_alloc_source_buffer (struct tui_win_info *win_info)

{

  char *src_line_buf;

  int i, line_width, max_lines;

  max_lines = win_info->generic.height; /* Less the highlight box.  */

  line_width = win_info->generic.width - 1;

  /*

   * Allocate the buffer for the source lines.  Do this only once

   * since they will be re-used for all source displays.  The only

   * other time this will be done is when a window's size changes.

   */

  if (win_info->generic.content == NULL)

    {

      src_line_buf = (char *)

        xmalloc ((max_lines * line_width) * sizeof (char));

      if (src_line_buf == (char *) NULL)

        {

          fputs_unfiltered ("Unable to Allocate Memory for Source or Disassembly Display.\n",

                            gdb_stderr);

          return TUI_FAILURE;

        }

      /* Allocate the content list.  */

      if ((win_info->generic.content =

           (void **) tui_alloc_content (max_lines, SRC_WIN)) == NULL)

        {

          xfree (src_line_buf);

          fputs_unfiltered ("Unable to Allocate Memory for Source or Disassembly Display.\n",

                            gdb_stderr);

          return TUI_FAILURE;

        }

      for (i = 0; i < max_lines; i++)

        ((struct tui_win_element *)

         win_info->generic.content[i])->which_element.source.line =

          src_line_buf + (line_width * i);

    }

  return TUI_SUCCESS;

}

/* Answer whether the a particular line number or address is displayed

   in the current source window.  */

int

tui_line_is_displayed (int line,

                       struct tui_win_info *win_info,

                       int check_threshold)

{

  int is_displayed = FALSE;

  int i, threshold;

  if (check_threshold)

    threshold = SCROLL_THRESHOLD;

  else

    threshold = 0;

  i = 0;

  while (i < win_info->generic.content_size - threshold

         && !is_displayed)

    {

      is_displayed = (((struct tui_win_element *)

                       win_info->generic.content[i])->which_element.source.line_or_addr.loa

                      == LOA_LINE)

        && (((struct tui_win_element *)

             win_info->generic.content[i])->which_element.source.line_or_addr.u.line_no

            == (int) line);

      i++;

    }

  return is_displayed;

}

/* Answer whether the a particular line number or address is displayed

   in the current source window.  */

int

tui_addr_is_displayed (CORE_ADDR addr,

                       struct tui_win_info *win_info,

                       int check_threshold)

{

  int is_displayed = FALSE;

  int i, threshold;

  if (check_threshold)

    threshold = SCROLL_THRESHOLD;

  else

    threshold = 0;

  i = 0;

  while (i < win_info->generic.content_size - threshold

         && !is_displayed)

    {

      is_displayed = (((struct tui_win_element *)

                       win_info->generic.content[i])->which_element.source.line_or_addr.loa

                      == LOA_ADDRESS)

        && (((struct tui_win_element *)

             win_info->generic.content[i])->which_element.source.line_or_addr.u.addr

            == addr);

      i++;

    }

  return is_displayed;

}

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

** STATIC LOCAL FUNCTIONS               **