/* TUI support I/O functions.
- Copyright (C) 1998-2017 Free Software Foundation, Inc.
+ Copyright (C) 1998-2022 Free Software Foundation, Inc.
Contributed by Hewlett-Packard Company.
#include "defs.h"
#include "target.h"
-#include "event-loop.h"
+#include "gdbsupport/event-loop.h"
#include "event-top.h"
#include "command.h"
#include "top.h"
#include "cli-out.h"
#include <fcntl.h>
#include <signal.h>
-#include "filestuff.h"
+#ifdef __MINGW32__
+#include <windows.h>
+#endif
+#include "gdbsupport/filestuff.h"
#include "completer.h"
#include "gdb_curses.h"
+#include <map>
/* This redefines CTRL if it is not already defined, so it must come
after terminal state releated include files like <term.h> and
"gdb_curses.h". */
#include "readline/readline.h"
-int
-key_is_start_sequence (int ch)
-{
- return (ch == 27);
-}
+#ifdef __MINGW32__
+static SHORT ncurses_norm_attr;
+#endif
-int
-key_is_end_sequence (int ch)
-{
- return (ch == 126);
-}
+static int tui_getc (FILE *fp);
-int
-key_is_backspace (int ch)
+static int
+key_is_start_sequence (int ch)
{
- return (ch == 8);
+ return (ch == 27);
}
/* Use definition from readline 4.3. */
be garbled. This is implemented with a pipe that TUI reads and
readline writes to. A gdb input handler is created so that reading
the pipe is handled automatically. This will probably not work on
- non-Unix platforms. The best fix is to make readline clean enougth
+ non-Unix platforms. The best fix is to make readline clean enough
so that is never write on stdout.
Note SCz/2002-09-01: we now use more readline hooks and it seems
static int tui_readline_pipe[2];
#endif
-/* The last gdb prompt that was registered in readline.
- This may be the main gdb prompt or a secondary prompt. */
-static char *tui_rl_saved_prompt;
+/* Print a character in the curses command window. The output is
+ buffered. It is up to the caller to refresh the screen if
+ necessary. */
+
+static void
+do_tui_putc (WINDOW *w, char c)
+{
+ /* Expand TABs, since ncurses on MS-Windows doesn't. */
+ if (c == '\t')
+ {
+ int col;
+
+ col = getcurx (w);
+ do
+ {
+ waddch (w, ' ');
+ col++;
+ }
+ while ((col % 8) != 0);
+ }
+ else
+ waddch (w, c);
+}
+
+/* Update the cached value of the command window's start line based on
+ the window's current Y coordinate. */
+
+static void
+update_cmdwin_start_line ()
+{
+ TUI_CMD_WIN->start_line = getcury (TUI_CMD_WIN->handle.get ());
+}
+
+/* Print a character in the curses command window. The output is
+ buffered. It is up to the caller to refresh the screen if
+ necessary. */
static void
tui_putc (char c)
{
- char buf[2];
+ do_tui_putc (TUI_CMD_WIN->handle.get (), c);
+ update_cmdwin_start_line ();
+}
+
+/* This maps colors to their corresponding color index. */
- buf[0] = c;
- buf[1] = 0;
- tui_puts (buf);
+static std::map<ui_file_style::color, int> color_map;
+
+/* This holds a pair of colors and is used to track the mapping
+ between a color pair index and the actual colors. */
+
+struct color_pair
+{
+ int fg;
+ int bg;
+
+ bool operator< (const color_pair &o) const
+ {
+ return fg < o.fg || (fg == o.fg && bg < o.bg);
+ }
+};
+
+/* This maps pairs of colors to their corresponding color pair
+ index. */
+
+static std::map<color_pair, int> color_pair_map;
+
+/* This is indexed by ANSI color offset from the base color, and holds
+ the corresponding curses color constant. */
+
+static const int curses_colors[] = {
+ COLOR_BLACK,
+ COLOR_RED,
+ COLOR_GREEN,
+ COLOR_YELLOW,
+ COLOR_BLUE,
+ COLOR_MAGENTA,
+ COLOR_CYAN,
+ COLOR_WHITE
+};
+
+/* Given a color, find its index. */
+
+static bool
+get_color (const ui_file_style::color &color, int *result)
+{
+ if (color.is_none ())
+ *result = -1;
+ else if (color.is_basic ())
+ *result = curses_colors[color.get_value ()];
+ else
+ {
+ auto it = color_map.find (color);
+ if (it == color_map.end ())
+ {
+ /* The first 8 colors are standard. */
+ int next = color_map.size () + 8;
+ if (next >= COLORS)
+ return false;
+ uint8_t rgb[3];
+ color.get_rgb (rgb);
+ /* We store RGB as 0..255, but curses wants 0..1000. */
+ if (init_color (next, rgb[0] * 1000 / 255, rgb[1] * 1000 / 255,
+ rgb[2] * 1000 / 255) == ERR)
+ return false;
+ color_map[color] = next;
+ *result = next;
+ }
+ else
+ *result = it->second;
+ }
+ return true;
}
-/* Print the string in the curses command window.
- The output is buffered. It is up to the caller to refresh the screen
+/* The most recently emitted color pair. */
+
+static int last_color_pair = -1;
+
+/* The most recently applied style. */
+
+static ui_file_style last_style;
+
+/* If true, we're highlighting the current source line in reverse
+ video mode. */
+static bool reverse_mode_p = false;
+
+/* The background/foreground colors before we entered reverse
+ mode. */
+static ui_file_style::color reverse_save_bg (ui_file_style::NONE);
+static ui_file_style::color reverse_save_fg (ui_file_style::NONE);
+
+/* Given two colors, return their color pair index; making a new one
if necessary. */
+static int
+get_color_pair (int fg, int bg)
+{
+ color_pair c = { fg, bg };
+ auto it = color_pair_map.find (c);
+ if (it == color_pair_map.end ())
+ {
+ /* Color pair 0 is our default color, so new colors start at
+ 1. */
+ int next = color_pair_map.size () + 1;
+ /* Curses has a limited number of available color pairs. Fall
+ back to the default if we've used too many. */
+ if (next >= COLOR_PAIRS)
+ return 0;
+ init_pair (next, fg, bg);
+ color_pair_map[c] = next;
+ return next;
+ }
+ return it->second;
+}
+
+/* Apply STYLE to W. */
+
void
-tui_puts (const char *string)
+tui_apply_style (WINDOW *w, ui_file_style style)
+{
+ /* Reset. */
+ wattron (w, A_NORMAL);
+ wattroff (w, A_BOLD);
+ wattroff (w, A_DIM);
+ wattroff (w, A_REVERSE);
+ if (last_color_pair != -1)
+ wattroff (w, COLOR_PAIR (last_color_pair));
+ wattron (w, COLOR_PAIR (0));
+
+ const ui_file_style::color &fg = style.get_foreground ();
+ const ui_file_style::color &bg = style.get_background ();
+ if (!fg.is_none () || !bg.is_none ())
+ {
+ int fgi, bgi;
+ if (get_color (fg, &fgi) && get_color (bg, &bgi))
+ {
+#ifdef __MINGW32__
+ /* MS-Windows port of ncurses doesn't support implicit
+ default foreground and background colors, so we must
+ specify them explicitly when needed, using the colors we
+ saw at startup. */
+ if (fgi == -1)
+ fgi = ncurses_norm_attr & 15;
+ if (bgi == -1)
+ bgi = (ncurses_norm_attr >> 4) & 15;
+#endif
+ int pair = get_color_pair (fgi, bgi);
+ if (last_color_pair != -1)
+ wattroff (w, COLOR_PAIR (last_color_pair));
+ wattron (w, COLOR_PAIR (pair));
+ last_color_pair = pair;
+ }
+ }
+
+ switch (style.get_intensity ())
+ {
+ case ui_file_style::NORMAL:
+ break;
+
+ case ui_file_style::BOLD:
+ wattron (w, A_BOLD);
+ break;
+
+ case ui_file_style::DIM:
+ wattron (w, A_DIM);
+ break;
+
+ default:
+ gdb_assert_not_reached ("invalid intensity");
+ }
+
+ if (style.is_reverse ())
+ wattron (w, A_REVERSE);
+
+ last_style = style;
+}
+
+/* Apply an ANSI escape sequence from BUF to W. BUF must start with
+ the ESC character. If BUF does not start with an ANSI escape,
+ return 0. Otherwise, apply the sequence if it is recognized, or
+ simply ignore it if not. In this case, the number of bytes read
+ from BUF is returned. */
+
+static size_t
+apply_ansi_escape (WINDOW *w, const char *buf)
+{
+ ui_file_style style = last_style;
+ size_t n_read;
+
+ if (!style.parse (buf, &n_read))
+ return n_read;
+
+ if (reverse_mode_p)
+ {
+ /* We want to reverse _only_ the default foreground/background
+ colors. If the foreground color is not the default (because
+ the text was styled), we want to leave it as is. If e.g.,
+ the terminal is fg=BLACK, and bg=WHITE, and the style wants
+ to print text in RED, we want to reverse the background color
+ (print in BLACK), but still print the text in RED. To do
+ that, we enable the A_REVERSE attribute, and re-reverse the
+ parsed-style's fb/bg colors.
+
+ Notes on the approach:
+
+ - there's no portable way to know which colors the default
+ fb/bg colors map to.
+
+ - this approach does the right thing even if you change the
+ terminal colors while GDB is running -- the reversed
+ colors automatically adapt.
+ */
+ if (!style.is_default ())
+ {
+ ui_file_style::color bg = style.get_background ();
+ ui_file_style::color fg = style.get_foreground ();
+ style.set_fg (bg);
+ style.set_bg (fg);
+ }
+
+ /* Enable A_REVERSE. */
+ style.set_reverse (true);
+ }
+
+ tui_apply_style (w, style);
+ return n_read;
+}
+
+/* See tui.io.h. */
+
+void
+tui_set_reverse_mode (WINDOW *w, bool reverse)
+{
+ ui_file_style style = last_style;
+
+ reverse_mode_p = reverse;
+ style.set_reverse (reverse);
+
+ if (reverse)
+ {
+ reverse_save_bg = style.get_background ();
+ reverse_save_fg = style.get_foreground ();
+ }
+ else
+ {
+ style.set_bg (reverse_save_bg);
+ style.set_fg (reverse_save_fg);
+ }
+
+ tui_apply_style (w, style);
+}
+
+/* Print LENGTH characters from the buffer pointed to by BUF to the
+ curses command window. The output is buffered. It is up to the
+ caller to refresh the screen if necessary. */
+
+void
+tui_write (const char *buf, size_t length)
+{
+ /* We need this to be \0-terminated for the regexp matching. */
+ std::string copy (buf, length);
+ tui_puts (copy.c_str ());
+}
+
+/* Print a string in the curses command window. The output is
+ buffered. It is up to the caller to refresh the screen if
+ necessary. */
+
+void
+tui_puts (const char *string, WINDOW *w)
+{
+ if (w == nullptr)
+ w = TUI_CMD_WIN->handle.get ();
+
+ while (true)
+ {
+ const char *next = strpbrk (string, "\n\1\2\033\t");
+
+ /* Print the plain text prefix. */
+ size_t n_chars = next == nullptr ? strlen (string) : next - string;
+ if (n_chars > 0)
+ waddnstr (w, string, n_chars);
+
+ /* We finished. */
+ if (next == nullptr)
+ break;
+
+ char c = *next;
+ switch (c)
+ {
+ case '\1':
+ case '\2':
+ /* Ignore these, they are readline escape-marking
+ sequences. */
+ ++next;
+ break;
+
+ case '\n':
+ case '\t':
+ do_tui_putc (w, c);
+ ++next;
+ break;
+
+ case '\033':
+ {
+ size_t bytes_read = apply_ansi_escape (w, next);
+ if (bytes_read > 0)
+ next += bytes_read;
+ else
+ {
+ /* Just drop the escape. */
+ ++next;
+ }
+ }
+ break;
+
+ default:
+ gdb_assert_not_reached ("missing case in tui_puts");
+ }
+
+ string = next;
+ }
+
+ if (TUI_CMD_WIN != nullptr && w == TUI_CMD_WIN->handle.get ())
+ update_cmdwin_start_line ();
+}
+
+static void
+tui_puts_internal (WINDOW *w, const char *string, int *height)
{
- static int tui_skip_line = -1;
char c;
- WINDOW *w;
+ int prev_col = 0;
+ bool saw_nl = false;
- w = TUI_CMD_WIN->generic.handle;
while ((c = *string++) != 0)
{
- /* Catch annotation and discard them. We need two \032 and
- discard until a \n is seen. */
- if (c == '\032')
- {
- tui_skip_line++;
- }
- else if (tui_skip_line != 1)
- {
- tui_skip_line = -1;
- /* Expand TABs, since ncurses on MS-Windows doesn't. */
- if (c == '\t')
- {
- int col;
+ if (c == '\n')
+ saw_nl = true;
- col = getcurx (w);
- do
+ if (c == '\1' || c == '\2')
+ {
+ /* Ignore these, they are readline escape-marking
+ sequences. */
+ }
+ else
+ {
+ if (c == '\033')
+ {
+ size_t bytes_read = apply_ansi_escape (w, string - 1);
+ if (bytes_read > 0)
{
- waddch (w, ' ');
- col++;
- } while ((col % 8) != 0);
+ string = string + bytes_read - 1;
+ continue;
+ }
}
- else
- waddch (w, c);
- }
- else if (c == '\n')
- tui_skip_line = -1;
+ do_tui_putc (w, c);
+
+ if (height != nullptr)
+ {
+ int col = getcurx (w);
+ if (col <= prev_col)
+ ++*height;
+ prev_col = col;
+ }
+ }
}
- TUI_CMD_WIN->detail.command_info.start_line = getcury (w);
+ if (TUI_CMD_WIN != nullptr && w == TUI_CMD_WIN->handle.get ())
+ update_cmdwin_start_line ();
+ if (saw_nl)
+ wrefresh (w);
}
/* Readline callback.
if (tui_current_key_mode == TUI_SINGLE_KEY_MODE)
prompt = "";
else
- prompt = tui_rl_saved_prompt;
+ prompt = rl_display_prompt;
c_pos = -1;
c_line = -1;
- w = TUI_CMD_WIN->generic.handle;
- start_line = TUI_CMD_WIN->detail.command_info.start_line;
+ w = TUI_CMD_WIN->handle.get ();
+ start_line = TUI_CMD_WIN->start_line;
wmove (w, start_line, 0);
prev_col = 0;
height = 1;
- for (in = 0; prompt && prompt[in]; in++)
- {
- waddch (w, prompt[in]);
- col = getcurx (w);
- if (col <= prev_col)
- height++;
- prev_col = col;
- }
+ if (prompt != nullptr)
+ tui_puts_internal (w, prompt, &height);
+
+ prev_col = getcurx (w);
for (in = 0; in <= rl_end; in++)
{
unsigned char c;
if (in == rl_point)
{
- getyx (w, c_line, c_pos);
+ getyx (w, c_line, c_pos);
}
if (in == rl_end)
- break;
+ break;
c = (unsigned char) rl_line_buffer[in];
if (CTRL_CHAR (c) || c == RUBOUT)
{
- waddch (w, '^');
- waddch (w, CTRL_CHAR (c) ? UNCTRL (c) : '?');
+ waddch (w, '^');
+ waddch (w, CTRL_CHAR (c) ? UNCTRL (c) : '?');
}
else if (c == '\t')
{
}
else
{
- waddch (w, c);
+ waddch (w, c);
}
if (c == '\n')
- TUI_CMD_WIN->detail.command_info.start_line = getcury (w);
+ TUI_CMD_WIN->start_line = getcury (w);
col = getcurx (w);
if (col < prev_col)
- height++;
+ height++;
prev_col = col;
}
wclrtobot (w);
- TUI_CMD_WIN->detail.command_info.start_line = getcury (w);
+ TUI_CMD_WIN->start_line = getcury (w);
if (c_line >= 0)
wmove (w, c_line, c_pos);
- TUI_CMD_WIN->detail.command_info.start_line -= height - 1;
+ TUI_CMD_WIN->start_line -= height - 1;
wrefresh (w);
fflush(stdout);
static void
tui_prep_terminal (int notused1)
{
- /* Save the prompt registered in readline to correctly display it.
- (we can't use gdb_prompt() due to secondary prompts and can't use
- rl_prompt because it points to an alloca buffer). */
- xfree (tui_rl_saved_prompt);
- tui_rl_saved_prompt = rl_prompt != NULL ? xstrdup (rl_prompt) : NULL;
+#ifdef NCURSES_MOUSE_VERSION
+ mousemask (ALL_MOUSE_EVENTS, NULL);
+#endif
}
/* Readline callback to restore the terminal. It is called once each
static void
tui_deprep_terminal (void)
{
+#ifdef NCURSES_MOUSE_VERSION
+ mousemask (0, NULL);
+#endif
}
#ifdef TUI_USE_PIPE_FOR_READLINE
static void
tui_mld_flush (const struct match_list_displayer *displayer)
{
- wrefresh (TUI_CMD_WIN->generic.handle);
+ wrefresh (TUI_CMD_WIN->handle.get ());
}
/* TUI version of displayer.erase_entire_line. */
static void
tui_mld_erase_entire_line (const struct match_list_displayer *displayer)
{
- WINDOW *w = TUI_CMD_WIN->generic.handle;
+ WINDOW *w = TUI_CMD_WIN->handle.get ();
int cur_y = getcury (w);
wmove (w, cur_y, 0);
beep ();
}
+/* A wrapper for wgetch that enters nonl mode. We We normally want
+ curses' "nl" mode, but when reading from the user, we'd like to
+ differentiate between C-j and C-m, because some users bind these
+ keys differently in their .inputrc. So, put curses into nonl mode
+ just when reading from the user. See PR tui/20819. */
+
+static int
+gdb_wgetch (WINDOW *win)
+{
+ nonl ();
+ int r = wgetch (win);
+ nl ();
+ return r;
+}
+
/* Helper function for tui_mld_read_key.
This temporarily replaces tui_getc for use during tab-completion
match list display. */
static int
tui_mld_getc (FILE *fp)
{
- WINDOW *w = TUI_CMD_WIN->generic.handle;
- int c = wgetch (w);
+ WINDOW *w = TUI_CMD_WIN->handle.get ();
+ int c = gdb_wgetch (w);
return c;
}
if (mode)
{
+ /* Ensure that readline has been initialized before saving any
+ of its variables. */
+ tui_ensure_readline_initialized ();
+
/* Redirect readline to TUI. */
tui_old_rl_redisplay_function = rl_redisplay_function;
tui_old_rl_deprep_terminal = rl_deprep_term_function;
/* Save tty for SIGCONT. */
savetty ();
+
+ /* Clean up color information. */
+ last_color_pair = -1;
+ last_style = ui_file_style ();
+ color_map.clear ();
+ color_pair_map.clear ();
}
}
if (tui_active)
{
/* Restore the terminal setting because another process (shell)
- might have changed it. */
+ might have changed it. */
resetty ();
/* Force a refresh of the screen. */
tui_refresh_all_win ();
-
- wrefresh (TUI_CMD_WIN->generic.handle);
}
signal (sig, tui_cont_sig);
}
if (tui_rl_outstream == 0)
error (_("Cannot redirect readline output"));
- setvbuf (tui_rl_outstream, (char*) NULL, _IOLBF, 0);
+ setvbuf (tui_rl_outstream, NULL, _IOLBF, 0);
#ifdef O_NONBLOCK
(void) fcntl (tui_readline_pipe[0], F_SETFL, O_NONBLOCK);
(void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY);
#endif
#endif
- add_file_handler (tui_readline_pipe[0], tui_readline_output, 0);
+ add_file_handler (tui_readline_pipe[0], tui_readline_output, 0, "tui");
#else
tui_rl_outstream = stdout;
#endif
+
+#ifdef __MINGW32__
+ /* MS-Windows port of ncurses doesn't support default foreground and
+ background colors, so we must record the default colors at startup. */
+ HANDLE hstdout = (HANDLE)_get_osfhandle (fileno (stdout));
+ DWORD cmode;
+ CONSOLE_SCREEN_BUFFER_INFO csbi;
+
+ if (hstdout != INVALID_HANDLE_VALUE
+ && GetConsoleMode (hstdout, &cmode) != 0
+ && GetConsoleScreenBufferInfo (hstdout, &csbi))
+ ncurses_norm_attr = csbi.wAttributes;
+#endif
}
-/* Get a character from the command window. This is called from the
- readline package. */
-int
-tui_getc (FILE *fp)
+/* Dispatch the correct tui function based upon the mouse event. */
+
+#ifdef NCURSES_MOUSE_VERSION
+
+static void
+tui_dispatch_mouse_event ()
+{
+ MEVENT mev;
+ if (getmouse (&mev) != OK)
+ return;
+
+ for (tui_win_info *wi : all_tui_windows ())
+ if (mev.x > wi->x && mev.x < wi->x + wi->width - 1
+ && mev.y > wi->y && mev.y < wi->y + wi->height - 1)
+ {
+ if ((mev.bstate & BUTTON1_CLICKED) != 0
+ || (mev.bstate & BUTTON2_CLICKED) != 0
+ || (mev.bstate & BUTTON3_CLICKED) != 0)
+ {
+ int button = (mev.bstate & BUTTON1_CLICKED) != 0 ? 1
+ : ((mev.bstate & BUTTON2_CLICKED) != 0 ? 2
+ : 3);
+ wi->click (mev.x - wi->x - 1, mev.y - wi->y - 1, button);
+ }
+#ifdef BUTTON5_PRESSED
+ else if ((mev.bstate & BUTTON4_PRESSED) != 0)
+ wi->backward_scroll (3);
+ else if ((mev.bstate & BUTTON5_PRESSED) != 0)
+ wi->forward_scroll (3);
+#endif
+ break;
+ }
+}
+
+#endif
+
+/* Dispatch the correct tui function based upon the control
+ character. */
+static unsigned int
+tui_dispatch_ctrl_char (unsigned int ch)
+{
+ struct tui_win_info *win_info = tui_win_with_focus ();
+
+ /* If no window has the focus, or if the focus window can't scroll,
+ just pass the character through. */
+ if (win_info == NULL || !win_info->can_scroll ())
+ return ch;
+
+ switch (ch)
+ {
+ case KEY_NPAGE:
+ win_info->forward_scroll (0);
+ break;
+ case KEY_PPAGE:
+ win_info->backward_scroll (0);
+ break;
+ case KEY_DOWN:
+ case KEY_SF:
+ win_info->forward_scroll (1);
+ break;
+ case KEY_UP:
+ case KEY_SR:
+ win_info->backward_scroll (1);
+ break;
+ case KEY_RIGHT:
+ win_info->left_scroll (1);
+ break;
+ case KEY_LEFT:
+ win_info->right_scroll (1);
+ break;
+ default:
+ /* We didn't recognize the character as a control character, so pass it
+ through. */
+ return ch;
+ }
+
+ /* We intercepted the control character, so return 0 (which readline
+ will interpret as a no-op). */
+ return 0;
+}
+
+/* See tui-io.h. */
+
+void
+tui_inject_newline_into_command_window ()
+{
+ gdb_assert (tui_active);
+
+ WINDOW *w = TUI_CMD_WIN->handle.get ();
+
+ /* When hitting return with an empty input, gdb executes the last
+ command. If we emit a newline, this fills up the command window
+ with empty lines with gdb prompt at beginning. Instead of that,
+ stay on the same line but provide a visual effect to show the
+ user we recognized the command. */
+ if (rl_end == 0 && !gdb_in_secondary_prompt_p (current_ui))
+ {
+ wmove (w, getcury (w), 0);
+
+ /* Clear the line. This will blink the gdb prompt since
+ it will be redrawn at the same line. */
+ wclrtoeol (w);
+ wrefresh (w);
+ napms (20);
+ }
+ else
+ {
+ /* Move cursor to the end of the command line before emitting the
+ newline. We need to do so because when ncurses outputs a newline
+ it truncates any text that appears past the end of the cursor. */
+ int px, py;
+ getyx (w, py, px);
+ px += rl_end - rl_point;
+ py += px / TUI_CMD_WIN->width;
+ px %= TUI_CMD_WIN->width;
+ wmove (w, py, px);
+ tui_putc ('\n');
+ }
+}
+
+/* If we're passing an escape sequence to readline, this points to a
+ string holding the remaining characters of the sequence to pass.
+ We advance the pointer one character at a time until '\0' is
+ reached. */
+static const char *cur_seq = nullptr;
+
+/* Set CUR_SEQ to point at the current sequence to pass to readline,
+ setup to call the input handler again so we complete the sequence
+ shortly, and return the first character to start the sequence. */
+
+static int
+start_sequence (const char *seq)
+{
+ call_stdin_event_handler_again_p = 1;
+ cur_seq = seq + 1;
+ return seq[0];
+}
+
+/* Main worker for tui_getc. Get a character from the command window.
+ This is called from the readline package, but wrapped in a
+ try/catch by tui_getc. */
+
+static int
+tui_getc_1 (FILE *fp)
{
int ch;
WINDOW *w;
- w = TUI_CMD_WIN->generic.handle;
+ w = TUI_CMD_WIN->handle.get ();
#ifdef TUI_USE_PIPE_FOR_READLINE
/* Flush readline output. */
tui_readline_output (0, 0);
#endif
- ch = wgetch (w);
-
- /* The \n must be echoed because it will not be printed by
- readline. */
- if (ch == '\n')
+ /* We enable keypad mode so that curses's wgetch processes mouse
+ escape sequences. In keypad mode, wgetch also processes the
+ escape sequences for keys such as up/down etc. and returns KEY_UP
+ / KEY_DOWN etc. When we have the focus on the command window
+ though, we want to pass the raw up/down etc. escape codes to
+ readline so readline understands them. */
+ if (cur_seq != nullptr)
{
- /* When hitting return with an empty input, gdb executes the last
- command. If we emit a newline, this fills up the command window
- with empty lines with gdb prompt at beginning. Instead of that,
- stay on the same line but provide a visual effect to show the
- user we recognized the command. */
- if (rl_end == 0 && !gdb_in_secondary_prompt_p (current_ui))
- {
- wmove (w, getcury (w), 0);
-
- /* Clear the line. This will blink the gdb prompt since
- it will be redrawn at the same line. */
- wclrtoeol (w);
- wrefresh (w);
- napms (20);
- }
+ ch = *cur_seq++;
+
+ /* If we've reached the end of the string, we're done with the
+ sequence. Otherwise, setup to get back here again for
+ another character. */
+ if (*cur_seq == '\0')
+ cur_seq = nullptr;
else
- {
- /* Move cursor to the end of the command line before emitting the
- newline. We need to do so because when ncurses outputs a newline
- it truncates any text that appears past the end of the cursor. */
- int px, py;
- getyx (w, py, px);
- px += rl_end - rl_point;
- py += px / TUI_CMD_WIN->generic.width;
- px %= TUI_CMD_WIN->generic.width;
- wmove (w, py, px);
- tui_putc ('\n');
- }
+ call_stdin_event_handler_again_p = 1;
+ return ch;
}
-
+ else
+ ch = gdb_wgetch (w);
+
/* Handle prev/next/up/down here. */
ch = tui_dispatch_ctrl_char (ch);
-
+
+#ifdef NCURSES_MOUSE_VERSION
+ if (ch == KEY_MOUSE)
+ {
+ tui_dispatch_mouse_event ();
+ return 0;
+ }
+#endif
+
+ /* Translate curses keys back to escape sequences so that readline
+ can understand them. We do this irrespective of which window has
+ the focus. If e.g., we're focused on a non-command window, then
+ the up/down keys will already have been filtered by
+ tui_dispatch_ctrl_char. Keys that haven't been intercepted will
+ be passed down to readline. */
+ if (current_ui->command_editing)
+ {
+ /* For the standard arrow keys + home/end, hardcode sequences
+ readline understands. See bind_arrow_keys_internal in
+ readline/readline.c. */
+ switch (ch)
+ {
+ case KEY_UP:
+ return start_sequence ("\033[A");
+ case KEY_DOWN:
+ return start_sequence ("\033[B");
+ case KEY_RIGHT:
+ return start_sequence ("\033[C");
+ case KEY_LEFT:
+ return start_sequence ("\033[D");
+ case KEY_HOME:
+ return start_sequence ("\033[H");
+ case KEY_END:
+ return start_sequence ("\033[F");
+
+ /* del and ins are unfortunately not hardcoded in readline for
+ all systems. */
+
+ case KEY_DC: /* del */
+#ifdef __MINGW32__
+ return start_sequence ("\340S");
+#else
+ return start_sequence ("\033[3~");
+#endif
+
+ case KEY_IC: /* ins */
+#if defined __MINGW32__
+ return start_sequence ("\340R");
+#else
+ return start_sequence ("\033[2~");
+#endif
+ }
+
+ /* Keycodes above KEY_MAX are not garanteed to be stable.
+ Compare keyname instead. */
+ if (ch >= KEY_MAX)
+ {
+ auto name = gdb::string_view (keyname (ch));
+
+ /* The following sequences are hardcoded in readline as
+ well. */
+
+ /* ctrl-arrow keys */
+ if (name == "kLFT5") /* ctrl-left */
+ return start_sequence ("\033[1;5D");
+ else if (name == "kRIT5") /* ctrl-right */
+ return start_sequence ("\033[1;5C");
+ else if (name == "kDC5") /* ctrl-del */
+ return start_sequence ("\033[3;5~");
+
+ /* alt-arrow keys */
+ else if (name == "kLFT3") /* alt-left */
+ return start_sequence ("\033[1;3D");
+ else if (name == "kRIT3") /* alt-right */
+ return start_sequence ("\033[1;3C");
+ }
+ }
+
+ /* Handle the CTRL-L refresh for each window. */
+ if (ch == '\f')
+ {
+ tui_refresh_all_win ();
+ return ch;
+ }
+
if (ch == KEY_BACKSPACE)
return '\b';
int ch_pending;
nodelay (w, TRUE);
- ch_pending = wgetch (w);
+ ch_pending = gdb_wgetch (w);
nodelay (w, FALSE);
/* If we have pending input following a start sequence, call the stdin
}
}
+ if (ch > 0xff)
+ {
+ /* Readline doesn't understand non-8-bit curses keys, filter
+ them out. */
+ return 0;
+ }
+
return ch;
}
-/* Utility function to expand TABs in a STRING into spaces. STRING
- will be displayed starting at column COL, and is assumed to include
- no newlines. The returned expanded string is malloc'ed. */
+/* Get a character from the command window. This is called from the
+ readline package. */
-char *
-tui_expand_tabs (const char *string, int col)
+static int
+tui_getc (FILE *fp)
{
- int n_adjust, ncol;
- const char *s;
- char *ret, *q;
-
- /* 1. How many additional characters do we need? */
- for (ncol = col, n_adjust = 0, s = string; s; )
+ try
{
- s = strpbrk (s, "\t");
- if (s)
- {
- ncol += (s - string) + n_adjust;
- /* Adjustment for the next tab stop, minus one for the TAB
- we replace with spaces. */
- n_adjust += 8 - (ncol % 8) - 1;
- s++;
- }
+ return tui_getc_1 (fp);
}
-
- /* Allocate the copy. */
- ret = q = (char *) xmalloc (strlen (string) + n_adjust + 1);
-
- /* 2. Copy the original string while replacing TABs with spaces. */
- for (ncol = col, s = string; s; )
+ catch (const gdb_exception &ex)
{
- const char *s1 = strpbrk (s, "\t");
- if (s1)
- {
- if (s1 > s)
- {
- strncpy (q, s, s1 - s);
- q += s1 - s;
- ncol += s1 - s;
- }
- do {
- *q++ = ' ';
- ncol++;
- } while ((ncol % 8) != 0);
- s1++;
- }
- else
- strcpy (q, s);
- s = s1;
+ /* Just in case, don't ever let an exception escape to readline.
+ This shouldn't ever happen, but if it does, print the
+ exception instead of just crashing GDB. */
+ exception_print (gdb_stderr, ex);
+
+ /* If we threw an exception, it's because we recognized the
+ character. */
+ return 0;
}
-
- return ret;
}
projects / binutils-gdb.git / blobdiff