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/* TUI layout window management.
Copyright (C) 1998-2019 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 "arch-utils.h"
#include "command.h"
#include "symtab.h"
#include "frame.h"
#include "source.h"
#include <ctype.h>
#include "tui/tui.h"
#include "tui/tui-command.h"
#include "tui/tui-data.h"
#include "tui/tui-wingeneral.h"
#include "tui/tui-stack.h"
#include "tui/tui-regs.h"
#include "tui/tui-win.h"
#include "tui/tui-winsource.h"
#include "tui/tui-disasm.h"
#include "tui/tui-layout.h"
#include "tui/tui-source.h"
#include "gdb_curses.h"
static void show_layout (enum tui_layout_type);
static void show_source_or_disasm_and_command (enum tui_layout_type);
static void show_source_command (void);
static void show_disasm_command (void);
static void show_source_disasm_command (void);
static void show_data (enum tui_layout_type);
static enum tui_layout_type next_layout (void);
static enum tui_layout_type prev_layout (void);
static void tui_layout_command (const char *, int);
static void extract_display_start_addr (struct gdbarch **, CORE_ADDR *);
static enum tui_layout_type current_layout = UNDEFINED_LAYOUT;
/* Accessor for the current layout. */
enum tui_layout_type
tui_current_layout (void)
{
return current_layout;
}
/* Show the screen layout defined. */
static void
show_layout (enum tui_layout_type layout)
{
enum tui_layout_type cur_layout = tui_current_layout ();
if (layout != cur_layout)
{
tui_make_all_invisible ();
switch (layout)
{
case SRC_DATA_COMMAND:
case DISASSEM_DATA_COMMAND:
show_data (layout);
break;
/* Now show the new layout. */
case SRC_COMMAND:
show_source_command ();
break;
case DISASSEM_COMMAND:
show_disasm_command ();
break;
case SRC_DISASSEM_COMMAND:
show_source_disasm_command ();
break;
default:
break;
}
current_layout = layout;
tui_delete_invisible_windows ();
}
}
/* Function to set the layout to SRC_COMMAND, DISASSEM_COMMAND,
SRC_DISASSEM_COMMAND, SRC_DATA_COMMAND, or DISASSEM_DATA_COMMAND. */
void
tui_set_layout (enum tui_layout_type layout_type)
{
gdb_assert (layout_type != UNDEFINED_LAYOUT);
enum tui_layout_type cur_layout = tui_current_layout ();
struct gdbarch *gdbarch;
CORE_ADDR addr;
struct tui_win_info *win_with_focus = tui_win_with_focus ();
extract_display_start_addr (&gdbarch, &addr);
enum tui_layout_type new_layout = layout_type;
if (new_layout != cur_layout)
{
show_layout (new_layout);
/* Now determine where focus should be. */
if (win_with_focus != TUI_CMD_WIN)
{
switch (new_layout)
{
case SRC_COMMAND:
tui_set_win_focus_to (TUI_SRC_WIN);
break;
case DISASSEM_COMMAND:
/* The previous layout was not showing code.
This can happen if there is no source
available:
1. if the source file is in another dir OR
2. if target was compiled without -g
We still want to show the assembly though! */
tui_get_begin_asm_address (&gdbarch, &addr);
tui_set_win_focus_to (TUI_DISASM_WIN);
break;
case SRC_DISASSEM_COMMAND:
/* The previous layout was not showing code.
This can happen if there is no source
available:
1. if the source file is in another dir OR
2. if target was compiled without -g
We still want to show the assembly though! */
tui_get_begin_asm_address (&gdbarch, &addr);
if (win_with_focus == TUI_SRC_WIN)
tui_set_win_focus_to (TUI_SRC_WIN);
else
tui_set_win_focus_to (TUI_DISASM_WIN);
break;
case SRC_DATA_COMMAND:
if (win_with_focus != TUI_DATA_WIN)
tui_set_win_focus_to (TUI_SRC_WIN);
else
tui_set_win_focus_to (TUI_DATA_WIN);
break;
case DISASSEM_DATA_COMMAND:
/* The previous layout was not showing code.
This can happen if there is no source
available:
1. if the source file is in another dir OR
2. if target was compiled without -g
We still want to show the assembly though! */
tui_get_begin_asm_address (&gdbarch, &addr);
if (win_with_focus != TUI_DATA_WIN)
tui_set_win_focus_to (TUI_DISASM_WIN);
else
tui_set_win_focus_to (TUI_DATA_WIN);
break;
default:
break;
}
}
/*
* Now update the window content.
*/
tui_update_source_windows_with_addr (gdbarch, addr);
if (new_layout == SRC_DATA_COMMAND
|| new_layout == DISASSEM_DATA_COMMAND)
TUI_DATA_WIN->show_registers (TUI_DATA_WIN->get_current_group ());
}
}
/* Add the specified window to the layout in a logical way. This
means setting up the most logical layout given the window to be
added. */
void
tui_add_win_to_layout (enum tui_win_type type)
{
enum tui_layout_type cur_layout = tui_current_layout ();
switch (type)
{
case SRC_WIN:
if (cur_layout != SRC_COMMAND
&& cur_layout != SRC_DISASSEM_COMMAND
&& cur_layout != SRC_DATA_COMMAND)
{
if (cur_layout == DISASSEM_DATA_COMMAND)
show_layout (SRC_DATA_COMMAND);
else
show_layout (SRC_COMMAND);
}
break;
case DISASSEM_WIN:
if (cur_layout != DISASSEM_COMMAND
&& cur_layout != SRC_DISASSEM_COMMAND
&& cur_layout != DISASSEM_DATA_COMMAND)
{
if (cur_layout == SRC_DATA_COMMAND)
show_layout (DISASSEM_DATA_COMMAND);
else
show_layout (DISASSEM_COMMAND);
}
break;
case DATA_WIN:
if (cur_layout != SRC_DATA_COMMAND
&& cur_layout != DISASSEM_DATA_COMMAND)
{
if (cur_layout == DISASSEM_COMMAND)
show_layout (DISASSEM_DATA_COMMAND);
else
show_layout (SRC_DATA_COMMAND);
}
break;
default:
break;
}
}
/* Complete possible layout names. TEXT is the complete text entered so
far, WORD is the word currently being completed. */
static void
layout_completer (struct cmd_list_element *ignore,
completion_tracker &tracker,
const char *text, const char *word)
{
static const char *layout_names [] =
{ "src", "asm", "split", "regs", "next", "prev", NULL };
complete_on_enum (tracker, layout_names, text, word);
}
/* Function to set the layout to SRC, ASM, SPLIT, NEXT, PREV, DATA, or
REGS. */
static void
tui_layout_command (const char *layout_name, int from_tty)
{
enum tui_layout_type new_layout = UNDEFINED_LAYOUT;
enum tui_layout_type cur_layout = tui_current_layout ();
if (layout_name == NULL || *layout_name == '\0')
error (_("Usage: layout prev | next | LAYOUT-NAME"));
/* First check for ambiguous input. */
if (strcmp (layout_name, "s") == 0)
error (_("Ambiguous command input."));
if (subset_compare (layout_name, "src"))
new_layout = SRC_COMMAND;
else if (subset_compare (layout_name, "asm"))
new_layout = DISASSEM_COMMAND;
else if (subset_compare (layout_name, "split"))
new_layout = SRC_DISASSEM_COMMAND;
else if (subset_compare (layout_name, "regs"))
{
if (cur_layout == SRC_COMMAND
|| cur_layout == SRC_DATA_COMMAND)
new_layout = SRC_DATA_COMMAND;
else
new_layout = DISASSEM_DATA_COMMAND;
}
else if (subset_compare (layout_name, "next"))
new_layout = next_layout ();
else if (subset_compare (layout_name, "prev"))
new_layout = prev_layout ();
else
error (_("Unrecognized layout: %s"), layout_name);
/* Make sure the curses mode is enabled. */
tui_enable ();
tui_set_layout (new_layout);
}
static void
extract_display_start_addr (struct gdbarch **gdbarch_p, CORE_ADDR *addr_p)
{
enum tui_layout_type cur_layout = tui_current_layout ();
struct gdbarch *gdbarch = get_current_arch ();
CORE_ADDR addr;
CORE_ADDR pc;
struct symtab_and_line cursal = get_current_source_symtab_and_line ();
switch (cur_layout)
{
case SRC_COMMAND:
case SRC_DATA_COMMAND:
gdbarch = TUI_SRC_WIN->gdbarch;
find_line_pc (cursal.symtab,
TUI_SRC_WIN->start_line_or_addr.u.line_no,
&pc);
addr = pc;
break;
case DISASSEM_COMMAND:
case SRC_DISASSEM_COMMAND:
case DISASSEM_DATA_COMMAND:
gdbarch = TUI_DISASM_WIN->gdbarch;
addr = TUI_DISASM_WIN->start_line_or_addr.u.addr;
break;
default:
addr = 0;
break;
}
*gdbarch_p = gdbarch;
*addr_p = addr;
}
/* Answer the previous layout to cycle to. */
static enum tui_layout_type
next_layout (void)
{
int new_layout;
new_layout = tui_current_layout ();
if (new_layout == UNDEFINED_LAYOUT)
new_layout = SRC_COMMAND;
else
{
new_layout++;
if (new_layout == UNDEFINED_LAYOUT)
new_layout = SRC_COMMAND;
}
return (enum tui_layout_type) new_layout;
}
/* Answer the next layout to cycle to. */
static enum tui_layout_type
prev_layout (void)
{
int new_layout;
new_layout = tui_current_layout ();
if (new_layout == SRC_COMMAND)
new_layout = DISASSEM_DATA_COMMAND;
else
{
new_layout--;
if (new_layout == UNDEFINED_LAYOUT)
new_layout = DISASSEM_DATA_COMMAND;
}
return (enum tui_layout_type) new_layout;
}
/* Show the Source/Command layout. */
static void
show_source_command (void)
{
show_source_or_disasm_and_command (SRC_COMMAND);
}
/* Show the Dissassem/Command layout. */
static void
show_disasm_command (void)
{
show_source_or_disasm_and_command (DISASSEM_COMMAND);
}
/* Show the Source/Disassem/Command layout. */
static void
show_source_disasm_command (void)
{
int cmd_height, src_height, asm_height;
if (TUI_CMD_WIN != NULL)
cmd_height = TUI_CMD_WIN->height;
else
cmd_height = tui_term_height () / 3;
src_height = (tui_term_height () - cmd_height) / 2;
asm_height = tui_term_height () - (src_height + cmd_height);
if (TUI_SRC_WIN == NULL)
tui_win_list[SRC_WIN] = new tui_source_window ();
TUI_SRC_WIN->resize (src_height,
tui_term_width (),
0,
0);
struct tui_locator_window *locator = tui_locator_win_info_ptr ();
gdb_assert (locator != nullptr);
if (TUI_DISASM_WIN == NULL)
tui_win_list[DISASSEM_WIN] = new tui_disasm_window ();
TUI_DISASM_WIN->resize (asm_height,
tui_term_width (),
0,
src_height - 1);
locator->resize (1, tui_term_width (),
0, (src_height + asm_height) - 1);
if (TUI_CMD_WIN == NULL)
tui_win_list[CMD_WIN] = new tui_cmd_window ();
TUI_CMD_WIN->resize (cmd_height,
tui_term_width (),
0,
tui_term_height () - cmd_height);
}
/* Show the Source/Data/Command or the Dissassembly/Data/Command
layout. */
static void
show_data (enum tui_layout_type new_layout)
{
int total_height = (tui_term_height () - TUI_CMD_WIN->height);
int src_height, data_height;
enum tui_win_type win_type;
struct tui_locator_window *locator = tui_locator_win_info_ptr ();
gdb_assert (locator != nullptr);
data_height = total_height / 2;
src_height = total_height - data_height;
if (tui_win_list[DATA_WIN] == nullptr)
tui_win_list[DATA_WIN] = new tui_data_window ();
tui_win_list[DATA_WIN]->resize (data_height, tui_term_width (), 0, 0);
if (new_layout == SRC_DATA_COMMAND)
win_type = SRC_WIN;
else
win_type = DISASSEM_WIN;
if (tui_win_list[win_type] == NULL)
{
if (win_type == SRC_WIN)
tui_win_list[win_type] = new tui_source_window ();
else
tui_win_list[win_type] = new tui_disasm_window ();
}
tui_win_list[win_type]->resize (src_height,
tui_term_width (),
0,
data_height - 1);
locator->resize (1, tui_term_width (),
0, total_height - 1);
TUI_CMD_WIN->resize (TUI_CMD_WIN->height, tui_term_width (),
0, total_height);
}
void
tui_gen_win_info::resize (int height_, int width_,
int origin_x_, int origin_y_)
{
if (width == width_ && height == height_
&& x == origin_x_ && y == origin_y_
&& handle != nullptr)
return;
width = width_;
height = height_;
if (height > 1)
viewport_height = height - 2;
else
viewport_height = 1;
x = origin_x_;
y = origin_y_;
if (handle != nullptr)
{
#ifdef HAVE_WRESIZE
wresize (handle.get (), height, width);
mvwin (handle.get (), y, x);
wmove (handle.get (), 0, 0);
#else
handle.reset (nullptr);
#endif
}
if (handle == nullptr)
make_window ();
rerender ();
}
/* Show the Source/Command or the Disassem layout. */
static void
show_source_or_disasm_and_command (enum tui_layout_type layout_type)
{
struct tui_source_window_base *win_info;
int src_height, cmd_height;
struct tui_locator_window *locator = tui_locator_win_info_ptr ();
gdb_assert (locator != nullptr);
if (TUI_CMD_WIN != NULL)
cmd_height = TUI_CMD_WIN->height;
else
cmd_height = tui_term_height () / 3;
src_height = tui_term_height () - cmd_height;
if (layout_type == SRC_COMMAND)
{
if (tui_win_list[SRC_WIN] == nullptr)
tui_win_list[SRC_WIN] = new tui_source_window ();
win_info = TUI_SRC_WIN;
}
else
{
if (tui_win_list[DISASSEM_WIN] == nullptr)
tui_win_list[DISASSEM_WIN] = new tui_disasm_window ();
win_info = TUI_DISASM_WIN;
}
locator->resize (1, tui_term_width (),
0, src_height - 1);
win_info->resize (src_height - 1,
tui_term_width (),
0,
0);
if (TUI_CMD_WIN == NULL)
tui_win_list[CMD_WIN] = new tui_cmd_window ();
TUI_CMD_WIN->resize (cmd_height,
tui_term_width (),
0,
src_height);
}
/* Function to initialize gdb commands, for tui window layout
manipulation. */
void
_initialize_tui_layout (void)
{
struct cmd_list_element *cmd;
cmd = add_com ("layout", class_tui, tui_layout_command, _("\
Change the layout of windows.\n\
Usage: layout prev | next | LAYOUT-NAME\n\
Layout names are:\n\
src : Displays source and command windows.\n\
asm : Displays disassembly and command windows.\n\
split : Displays source, disassembly and command windows.\n\
regs : Displays register window. If existing layout\n\
is source/command or assembly/command, the \n\
register window is displayed. If the\n\
source/assembly/command (split) is displayed, \n\
the register window is displayed with \n\
the window that has current logical focus."));
set_cmd_completer (cmd, layout_completer);
}
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