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/* TUI display locator.

   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 "symtab.h"

#include "breakpoint.h"

#include "frame.h"

#include "command.h"

#include "inferior.h"

#include "target.h"

#include "top.h"

#include "gdb_string.h"

#include "tui/tui.h"

#include "tui/tui-data.h"

#include "tui/tui-stack.h"

#include "tui/tui-wingeneral.h"

#include "tui/tui-source.h"

#include "tui/tui-winsource.h"

#include "tui/tui-file.h"

#include "gdb_curses.h"

/* Get a printable name for the function at the address.

   The symbol name is demangled if demangling is turned on.

   Returns a pointer to a static area holding the result.  */

static char *tui_get_function_from_frame (struct frame_info *fi);

/* Set the filename portion of the locator.  */

static void tui_set_locator_filename (const char *filename);

/* Update the locator, with the provided arguments.  */

static void tui_set_locator_info (const char *filename,

                                  const char *procname,

                                  int lineno, CORE_ADDR addr);

static void tui_update_command (char *, int);

/* Create the status line to display as much information as we can on

   this single line: target name, process number, current function,

   current line, current PC, SingleKey mode.  */

static char*

tui_make_status_line (struct tui_locator_element *loc)

{

  char *string;

  char line_buf[50], *pname;

  char *buf;

  int status_size;

  int i, proc_width;

  const char *pid_name;

  const char *pc_buf;

  int target_width;

  int pid_width;

  int line_width;

  int pc_width;

  struct ui_file *pc_out;

  if (ptid_equal (inferior_ptid, null_ptid))

    pid_name = "No process";

  else

    pid_name = target_pid_to_str (inferior_ptid);

  target_width = strlen (target_shortname);

  if (target_width > MAX_TARGET_WIDTH)

    target_width = MAX_TARGET_WIDTH;

  pid_width = strlen (pid_name);

  if (pid_width > MAX_PID_WIDTH)

    pid_width = MAX_PID_WIDTH;

  status_size = tui_term_width ();

  string = (char *) xmalloc (status_size + 1);

  buf = (char*) alloca (status_size + 1);

  /* Translate line number and obtain its size.  */

  if (loc->line_no > 0)

    sprintf (line_buf, "%d", loc->line_no);

  else

    strcpy (line_buf, "??");

  line_width = strlen (line_buf);

  if (line_width < MIN_LINE_WIDTH)

    line_width = MIN_LINE_WIDTH;

  /* Translate PC address.  */

  pc_out = tui_sfileopen (128);

  deprecated_print_address_numeric (loc->addr, 1, pc_out);

  pc_buf = tui_file_get_strbuf (pc_out);

  pc_width = strlen (pc_buf);

  /* First determine the amount of proc name width we have available.

     The +1 are for a space separator between fields.

     The -1 are to take into account the \0 counted by sizeof.  */

  proc_width = (status_size

                - (target_width + 1)

                - (pid_width + 1)

                - (sizeof (PROC_PREFIX) - 1 + 1)

                - (sizeof (LINE_PREFIX) - 1 + line_width + 1)

                - (sizeof (PC_PREFIX) - 1 + pc_width + 1)

                - (tui_current_key_mode == TUI_SINGLE_KEY_MODE

                   ? (sizeof (SINGLE_KEY) - 1 + 1)

                   : 0));

  /* If there is no room to print the function name, try by removing

     some fields.  */

  if (proc_width < MIN_PROC_WIDTH)

    {

      proc_width += target_width + 1;

      target_width = 0;

      if (proc_width < MIN_PROC_WIDTH)

        {

          proc_width += pid_width + 1;

          pid_width = 0;

          if (proc_width <= MIN_PROC_WIDTH)

            {

              proc_width += pc_width + sizeof (PC_PREFIX) - 1 + 1;

              pc_width = 0;

              if (proc_width < 0)

                {

                  proc_width += line_width + sizeof (LINE_PREFIX) - 1 + 1;

                  line_width = 0;

                  if (proc_width < 0)

                    proc_width = 0;

                }

            }

        }

    }

  /* Now convert elements to string form.  */

  pname = loc->proc_name;

  /* Now create the locator line from the string version of the

     elements.  We could use sprintf() here but that wouldn't ensure

     that we don't overrun the size of the allocated buffer.

     strcat_to_buf() will.  */

  *string = (char) 0;

  if (target_width > 0)

    {

      sprintf (buf, "%*.*s ",

               -target_width, target_width, target_shortname);

      strcat_to_buf (string, status_size, buf);

    }

  if (pid_width > 0)

    {

      sprintf (buf, "%*.*s ",

               -pid_width, pid_width, pid_name);

      strcat_to_buf (string, status_size, buf);

    }

  /* Show whether we are in SingleKey mode.  */

  if (tui_current_key_mode == TUI_SINGLE_KEY_MODE)

    {

      strcat_to_buf (string, status_size, SINGLE_KEY);

      strcat_to_buf (string, status_size, " ");

    }

  /* Procedure/class name.  */

  if (proc_width > 0)

    {

      if (strlen (pname) > proc_width)

        sprintf (buf, "%s%*.*s* ", PROC_PREFIX,

                 1 - proc_width, proc_width - 1, pname);

      else

        sprintf (buf, "%s%*.*s ", PROC_PREFIX,

                 -proc_width, proc_width, pname);

      strcat_to_buf (string, status_size, buf);

    }

  if (line_width > 0)

    {

      sprintf (buf, "%s%*.*s ", LINE_PREFIX,

               -line_width, line_width, line_buf);

      strcat_to_buf (string, status_size, buf);

    }

  if (pc_width > 0)

    {

      strcat_to_buf (string, status_size, PC_PREFIX);

      strcat_to_buf (string, status_size, pc_buf);

    }

  for (i = strlen (string); i < status_size; i++)

    string[i] = ' ';

  string[status_size] = (char) 0;

  ui_file_delete (pc_out);

  return string;

}

/* Get a printable name for the function at the address.  The symbol

   name is demangled if demangling is turned on.  Returns a pointer to

   a static area holding the result.  */

static char*

tui_get_function_from_frame (struct frame_info *fi)

{

  static char name[256];

  struct ui_file *stream = tui_sfileopen (256);

  char *p;

  print_address_symbolic (get_frame_pc (fi), stream, demangle, "");

  p = tui_file_get_strbuf (stream);

  /* Use simple heuristics to isolate the function name.  The symbol

     can be demangled and we can have function parameters.  Remove

     them because the status line is too short to display them.  */

  if (*p == '<')

    p++;

  strncpy (name, p, sizeof (name));

  p = strchr (name, '(');

  if (!p)

    p = strchr (name, '>');

  if (p)

    *p = 0;

  p = strchr (name, '+');

  if (p)

    *p = 0;

  ui_file_delete (stream);

  return name;

}

void

tui_show_locator_content (void)

{

  char *string;

  struct tui_gen_win_info *locator;

  locator = tui_locator_win_info_ptr ();

  if (locator != NULL && locator->handle != (WINDOW *) NULL)

    {

      struct tui_win_element *element;

      element = (struct tui_win_element *) locator->content[0];

      string = tui_make_status_line (&element->which_element.locator);

      wmove (locator->handle, 0, 0);

      wstandout (locator->handle);

      waddstr (locator->handle, string);

      wclrtoeol (locator->handle);

      wstandend (locator->handle);

      tui_refresh_win (locator);

      wmove (locator->handle, 0, 0);

      xfree (string);

      locator->content_in_use = TRUE;

    }

}

/* Set the filename portion of the locator.  */

static void

tui_set_locator_filename (const char *filename)

{

  struct tui_gen_win_info *locator = tui_locator_win_info_ptr ();

  struct tui_locator_element *element;

  if (locator->content[0] == NULL)

    {

      tui_set_locator_info (filename, NULL, 0, 0);

      return;

    }

  element = &((struct tui_win_element *) locator->content[0])->which_element.locator;

  element->file_name[0] = 0;

  strcat_to_buf (element->file_name, MAX_LOCATOR_ELEMENT_LEN, filename);

}

/* Update the locator, with the provided arguments.  */

static void

tui_set_locator_info (const char *filename,

                      const char *procname,

                      int lineno,

                      CORE_ADDR addr)

{

  struct tui_gen_win_info *locator = tui_locator_win_info_ptr ();

  struct tui_locator_element *element;

  /* Allocate the locator content if necessary.  */

  if (locator->content_size <= 0)

    {

      locator->content = (void **) tui_alloc_content (1, locator->type);

      locator->content_size = 1;

    }

  element = &((struct tui_win_element *) locator->content[0])->which_element.locator;

  element->proc_name[0] = (char) 0;

  strcat_to_buf (element->proc_name, MAX_LOCATOR_ELEMENT_LEN, procname);

  element->line_no = lineno;

  element->addr = addr;

  tui_set_locator_filename (filename);

}

/* Update only the filename portion of the locator.  */

void

tui_update_locator_filename (const char *filename)

{

  tui_set_locator_filename (filename);

  tui_show_locator_content ();

}

/* Function to print the frame information for the TUI.  */

void

tui_show_frame_info (struct frame_info *fi)

{

  struct tui_win_info *win_info;

  int i;

  if (fi)

    {

      int start_line, i;

      CORE_ADDR low;

      struct tui_gen_win_info *locator = tui_locator_win_info_ptr ();

      int source_already_displayed;

      struct symtab_and_line sal;

      find_frame_sal (fi, &sal);

      source_already_displayed = sal.symtab != 0

        && tui_source_is_displayed (sal.symtab->filename);

      tui_set_locator_info (sal.symtab == 0 ? "??" : sal.symtab->filename,

                            tui_get_function_from_frame (fi),

                            sal.line,

                            get_frame_pc (fi));

      tui_show_locator_content ();

      start_line = 0;

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

        {

          union tui_which_element *item;

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

          item = &((struct tui_win_element *) locator->content[0])->which_element;

          if (win_info == TUI_SRC_WIN)

            {

              start_line = (item->locator.line_no -

                           (win_info->generic.viewport_height / 2)) + 1;

              if (start_line <= 0)

                start_line = 1;

            }

          else

            {

              if (find_pc_partial_function (get_frame_pc (fi), (char **) NULL,

                                            &low, (CORE_ADDR) 0) == 0)

                error (_("No function contains program counter for selected frame."));

              else

                low = tui_get_low_disassembly_address (low, get_frame_pc (fi));

            }

          if (win_info == TUI_SRC_WIN)

            {

              struct tui_line_or_address l;

              l.loa = LOA_LINE;

              l.u.line_no = start_line;

              if (!(source_already_displayed

                    && tui_line_is_displayed (item->locator.line_no, win_info, TRUE)))

                tui_update_source_window (win_info, sal.symtab, l, TRUE);

              else

                {

                  l.u.line_no = item->locator.line_no;

                  tui_set_is_exec_point_at (l, win_info);

                }

            }

          else

            {

              if (win_info == TUI_DISASM_WIN)

                {

                  struct tui_line_or_address a;

                  a.loa = LOA_ADDRESS;

                  a.u.addr = low;

                  if (!tui_addr_is_displayed (item->locator.addr, win_info, TRUE))

                    tui_update_source_window (win_info, sal.symtab, a, TRUE);

                  else

                    {

                      a.u.addr = item->locator.addr;

                      tui_set_is_exec_point_at (a, win_info);

                    }

                }

            }

          tui_update_exec_info (win_info);

        }

    }

  else

    {

      tui_set_locator_info (NULL, NULL, 0, (CORE_ADDR) 0);

      tui_show_locator_content ();

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

        {

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

          tui_clear_source_content (win_info, EMPTY_SOURCE_PROMPT);

          tui_update_exec_info (win_info);

        }

    }

}

/* Function to initialize gdb commands, for tui window stack

   manipulation.  */

void

_initialize_tui_stack (void)

{

  add_com ("update", class_tui, tui_update_command, _("\

Update the source window and locator to display the current execution point.\n"));

}

/* Command to update the display with the current execution point.  */

static void

tui_update_command (char *arg, int from_tty)

{

  char cmd[sizeof("frame 0")];

  strcpy (cmd, "frame 0");

  execute_command (cmd, from_tty);

}