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curs_lib.c
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curs_lib.c
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/**
* @file
* GUI miscellaneous curses (window drawing) routines
*
* @authors
* Copyright (C) 1996-2002,2010,2012-2013 Michael R. Elkins <[email protected]>
* Copyright (C) 2004 g10 Code GmbH
*
* @copyright
* 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 2 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 "config.h"
#include <stddef.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <langinfo.h>
#include <limits.h>
#include <regex.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <wchar.h>
#include "mutt/mutt.h"
#include "config/lib.h"
#include "email/lib.h"
#include "mutt.h"
#include "curs_lib.h"
#include "browser.h"
#include "context.h"
#include "enter_state.h"
#include "globals.h"
#include "mailbox.h"
#include "menu.h"
#include "mutt_curses.h"
#include "mutt_logging.h"
#include "mutt_window.h"
#include "muttlib.h"
#include "opcodes.h"
#include "options.h"
#include "pager.h"
#include "protos.h"
#include "sidebar.h"
#ifdef HAVE_ISWBLANK
#include <wctype.h>
#endif
#ifdef USE_NOTMUCH
#include "notmuch/mutt_notmuch.h"
#endif
#ifdef USE_INOTIFY
#include "monitor.h"
#endif
/* These Config Variables are only used in curs_lib.c */
bool MetaKey; ///< Config: Interpret 'ALT-x' as 'ESC-x'
/* not possible to unget more than one char under some curses libs, and it
* is impossible to unget function keys in SLang, so roll our own input
* buffering routines.
*/
/* These are used for macros and exec/push commands.
* They can be temporarily ignored by setting OptIgnoreMacroEvents
*/
static size_t MacroBufferCount = 0;
static size_t MacroBufferLen = 0;
static struct Event *MacroEvents;
/* These are used in all other "normal" situations, and are not
* ignored when setting OptIgnoreMacroEvents
*/
static size_t UngetCount = 0;
static size_t UngetLen = 0;
static struct Event *UngetKeyEvents;
int MuttGetchTimeout = -1;
/**
* mutt_refresh - Force a refresh of the screen
*/
void mutt_refresh(void)
{
/* don't refresh when we are waiting for a child. */
if (OptKeepQuiet)
return;
/* don't refresh in the middle of macros unless necessary */
if (MacroBufferCount && !OptForceRefresh && !OptIgnoreMacroEvents)
return;
/* else */
refresh();
}
/**
* mutt_need_hard_redraw - Force a hard refresh
*
* Make sure that the next refresh does a full refresh. This could be
* optimized by not doing it at all if DISPLAY is set as this might indicate
* that a GUI based pinentry was used. Having an option to customize this is
* of course the NeoMutt way.
*/
void mutt_need_hard_redraw(void)
{
keypad(stdscr, true);
clearok(stdscr, true);
mutt_menu_set_current_redraw_full();
}
/**
* mutt_getch_timeout - Set the getch() timeout
* @param delay Timeout delay in ms
*
* delay is just like for timeout() or poll(): the number of milliseconds
* mutt_getch() should block for input.
* * delay == 0 means mutt_getch() is non-blocking.
* * delay < 0 means mutt_getch is blocking.
*/
void mutt_getch_timeout(int delay)
{
MuttGetchTimeout = delay;
timeout(delay);
}
#ifdef USE_INOTIFY
/**
* mutt_monitor_getch - Get a character and poll the filesystem monitor
* @retval num Character pressed
* @retval ERR Timeout
*/
static int mutt_monitor_getch(void)
{
/* ncurses has its own internal buffer, so before we perform a poll,
* we need to make sure there isn't a character waiting */
timeout(0);
int ch = getch();
timeout(MuttGetchTimeout);
if (ch == ERR)
{
if (mutt_monitor_poll() != 0)
ch = ERR;
else
ch = getch();
}
return ch;
}
#endif /* USE_INOTIFY */
/**
* mutt_getch - Read a character from the input buffer
* @retval obj Event to process
*
* The priority for reading events is:
* 1. UngetKeyEvents buffer
* 2. MacroEvents buffer
* 3. Keyboard
*
* This function can return:
* - Error `{ -1, OP_NULL }`
* - Timeout `{ -2, OP_NULL }`
*/
struct Event mutt_getch(void)
{
int ch;
struct Event err = { -1, OP_NULL }, ret;
struct Event timeout = { -2, OP_NULL };
if (UngetCount)
return UngetKeyEvents[--UngetCount];
if (!OptIgnoreMacroEvents && MacroBufferCount)
return MacroEvents[--MacroBufferCount];
SigInt = 0;
mutt_sig_allow_interrupt(1);
#ifdef KEY_RESIZE
/* ncurses 4.2 sends this when the screen is resized */
ch = KEY_RESIZE;
while (ch == KEY_RESIZE)
#endif /* KEY_RESIZE */
#ifdef USE_INOTIFY
ch = mutt_monitor_getch();
#else
ch = getch();
#endif /* USE_INOTIFY */
mutt_sig_allow_interrupt(0);
if (SigInt)
{
mutt_query_exit();
return err;
}
/* either timeout, a sigwinch (if timeout is set), or the terminal
* has been lost */
if (ch == ERR)
{
if (!isatty(0))
mutt_exit(1);
return timeout;
}
if ((ch & 0x80) && MetaKey)
{
/* send ALT-x as ESC-x */
ch &= ~0x80;
mutt_unget_event(ch, 0);
ret.ch = '\033';
ret.op = 0;
return ret;
}
ret.ch = ch;
ret.op = 0;
return ch == ctrl('G') ? err : ret;
}
/**
* mutt_get_field_full - Ask the user for a string
* @param[in] field Prompt
* @param[in] buf Buffer for the result
* @param[in] buflen Length of buffer
* @param[in] complete Flags for completion, e.g. #MUTT_FILE
* @param[in] multiple Allow multiple selections
* @param[out] files List of files selected
* @param[out] numfiles Number of files selected
* @retval 1 Redraw the screen and call the function again
* @retval 0 Selection made
* @retval -1 Aborted
*/
int mutt_get_field_full(const char *field, char *buf, size_t buflen,
int complete, bool multiple, char ***files, int *numfiles)
{
int ret;
int x;
struct EnterState *es = mutt_enter_state_new();
do
{
if (SigWinch)
{
SigWinch = 0;
mutt_resize_screen();
clearok(stdscr, TRUE);
mutt_menu_current_redraw();
}
mutt_window_clearline(MuttMessageWindow, 0);
SETCOLOR(MT_COLOR_PROMPT);
addstr(field);
NORMAL_COLOR;
mutt_refresh();
mutt_window_getxy(MuttMessageWindow, &x, NULL);
ret = mutt_enter_string_full(buf, buflen, x, complete, multiple, files, numfiles, es);
} while (ret == 1);
mutt_window_clearline(MuttMessageWindow, 0);
mutt_enter_state_free(&es);
return ret;
}
/**
* mutt_get_field_unbuffered - Ask the user for a string (ignoring macro buffer)
* @param msg Prompt
* @param buf Buffer for the result
* @param buflen Length of buffer
* @param flags Flags for completion, e.g. #MUTT_FILE
* @retval 1 Redraw the screen and call the function again
* @retval 0 Selection made
* @retval -1 Aborted
*/
int mutt_get_field_unbuffered(char *msg, char *buf, size_t buflen, int flags)
{
int rc;
OptIgnoreMacroEvents = true;
rc = mutt_get_field(msg, buf, buflen, flags);
OptIgnoreMacroEvents = false;
return rc;
}
/**
* mutt_edit_file - Let the user edit a file
* @param editor User's editor config
* @param file File to edit
*/
void mutt_edit_file(const char *editor, const char *file)
{
char cmd[HUGE_STRING];
mutt_endwin();
mutt_file_expand_fmt_quote(cmd, sizeof(cmd), editor, file);
if (mutt_system(cmd) != 0)
{
mutt_error(_("Error running \"%s\""), cmd);
}
/* the terminal may have been resized while the editor owned it */
mutt_resize_screen();
keypad(stdscr, true);
clearok(stdscr, true);
}
/**
* mutt_yesorno - Ask the user a Yes/No question
* @param msg Prompt
* @param def Default answer, e.g. #MUTT_YES
* @retval num Selection made, e.g. #MUTT_NO
*/
int mutt_yesorno(const char *msg, int def)
{
struct Event ch;
char *yes = _("yes");
char *no = _("no");
char *answer_string = NULL;
int answer_string_wid, msg_wid;
size_t trunc_msg_len;
bool redraw = true;
int prompt_lines = 1;
char *expr = NULL;
regex_t reyes;
regex_t reno;
char answer[2];
answer[1] = '\0';
bool reyes_ok = (expr = nl_langinfo(YESEXPR)) && (expr[0] == '^') &&
(REGCOMP(&reyes, expr, REG_NOSUB) == 0);
bool reno_ok = (expr = nl_langinfo(NOEXPR)) && (expr[0] == '^') &&
(REGCOMP(&reno, expr, REG_NOSUB) == 0);
/* In order to prevent the default answer to the question to wrapped
* around the screen in the even the question is wider than the screen,
* ensure there is enough room for the answer and truncate the question
* to fit.
*/
safe_asprintf(&answer_string, " ([%s]/%s): ", def == MUTT_YES ? yes : no,
def == MUTT_YES ? no : yes);
answer_string_wid = mutt_strwidth(answer_string);
msg_wid = mutt_strwidth(msg);
while (true)
{
if (redraw || SigWinch)
{
redraw = false;
if (SigWinch)
{
SigWinch = 0;
mutt_resize_screen();
clearok(stdscr, TRUE);
mutt_menu_current_redraw();
}
if (MuttMessageWindow->cols)
{
prompt_lines = (msg_wid + answer_string_wid + MuttMessageWindow->cols - 1) /
MuttMessageWindow->cols;
prompt_lines = MAX(1, MIN(3, prompt_lines));
}
if (prompt_lines != MuttMessageWindow->rows)
{
mutt_window_reflow_message_rows(prompt_lines);
mutt_menu_current_redraw();
}
/* maxlen here is sort of arbitrary, so pick a reasonable upper bound */
trunc_msg_len = mutt_wstr_trunc(
msg, 4 * prompt_lines * MuttMessageWindow->cols,
prompt_lines * MuttMessageWindow->cols - answer_string_wid, NULL);
mutt_window_move(MuttMessageWindow, 0, 0);
SETCOLOR(MT_COLOR_PROMPT);
addnstr(msg, trunc_msg_len);
addstr(answer_string);
NORMAL_COLOR;
mutt_window_clrtoeol(MuttMessageWindow);
}
mutt_refresh();
/* SigWinch is not processed unless timeout is set */
mutt_getch_timeout(30 * 1000);
ch = mutt_getch();
mutt_getch_timeout(-1);
if (ch.ch == -2)
continue;
if (CI_is_return(ch.ch))
break;
if (ch.ch < 0)
{
def = MUTT_ABORT;
break;
}
answer[0] = ch.ch;
if (reyes_ok ? (regexec(&reyes, answer, 0, 0, 0) == 0) : (tolower(ch.ch) == 'y'))
{
def = MUTT_YES;
break;
}
else if (reno_ok ? (regexec(&reno, answer, 0, 0, 0) == 0) : (tolower(ch.ch) == 'n'))
{
def = MUTT_NO;
break;
}
else
{
BEEP();
}
}
FREE(&answer_string);
if (reyes_ok)
regfree(&reyes);
if (reno_ok)
regfree(&reno);
if (MuttMessageWindow->rows != 1)
{
mutt_window_reflow_message_rows(1);
mutt_menu_current_redraw();
}
else
mutt_window_clearline(MuttMessageWindow, 0);
if (def != MUTT_ABORT)
{
addstr((char *) (def == MUTT_YES ? yes : no));
mutt_refresh();
}
else
{
/* when the users cancels with ^G, clear the message stored with
* mutt_message() so it isn't displayed when the screen is refreshed. */
mutt_clear_error();
}
return def;
}
/**
* mutt_query_exit - Ask the user if they want to leave NeoMutt
*
* This function is called when the user presses the abort key.
*/
void mutt_query_exit(void)
{
mutt_flushinp();
curs_set(1);
if (Timeout)
mutt_getch_timeout(-1); /* restore blocking operation */
if (mutt_yesorno(_("Exit NeoMutt?"), MUTT_YES) == MUTT_YES)
{
mutt_exit(1);
}
mutt_clear_error();
mutt_curs_set(-1);
SigInt = 0;
}
/**
* mutt_show_error - Show the user an error message
*/
void mutt_show_error(void)
{
if (OptKeepQuiet || !ErrorBufMessage)
return;
SETCOLOR(OptMsgErr ? MT_COLOR_ERROR : MT_COLOR_MESSAGE);
mutt_window_mvaddstr(MuttMessageWindow, 0, 0, ErrorBuf);
NORMAL_COLOR;
mutt_window_clrtoeol(MuttMessageWindow);
}
/**
* mutt_endwin - Shutdown curses/slang
*/
void mutt_endwin(void)
{
if (OptNoCurses)
return;
int e = errno;
/* at least in some situations (screen + xterm under SuSE11/12) endwin()
* doesn't properly flush the screen without an explicit call. */
mutt_refresh();
endwin();
errno = e;
}
/**
* mutt_perror_debug - Show the user an 'errno' message
* @param s Additional text to show
*/
void mutt_perror_debug(const char *s)
{
char *p = strerror(errno);
mutt_debug(1, "%s: %s (errno = %d)\n", s, p ? p : "unknown error", errno);
mutt_error("%s: %s (errno = %d)", s, p ? p : _("unknown error"), errno);
}
/**
* mutt_any_key_to_continue - Prompt the user to 'press any key' and wait
* @param s Message prompt
* @retval num Key pressed
* @retval EOF Error, or prompt aborted
*/
int mutt_any_key_to_continue(const char *s)
{
struct termios t;
struct termios old;
int f, ch;
f = open("/dev/tty", O_RDONLY);
if (f < 0)
return EOF;
tcgetattr(f, &t);
memcpy((void *) &old, (void *) &t, sizeof(struct termios)); /* save original state */
t.c_lflag &= ~(ICANON | ECHO);
t.c_cc[VMIN] = 1;
t.c_cc[VTIME] = 0;
tcsetattr(f, TCSADRAIN, &t);
fflush(stdout);
if (s)
fputs(s, stdout);
else
fputs(_("Press any key to continue..."), stdout);
fflush(stdout);
ch = fgetc(stdin);
fflush(stdin);
tcsetattr(f, TCSADRAIN, &old);
close(f);
fputs("\r\n", stdout);
mutt_clear_error();
return (ch >= 0) ? ch : EOF;
}
/**
* mutt_do_pager - Display some page-able text to the user
* @param banner Message for status bar
* @param tempfile File to display
* @param do_color Flags, e.g. #MUTT_PAGER_MESSAGE
* @param info Info about current mailbox (OPTIONAL)
* @retval 0 Success
* @retval -1 Error
*/
int mutt_do_pager(const char *banner, const char *tempfile, int do_color, struct Pager *info)
{
int rc;
if (!Pager || (mutt_str_strcmp(Pager, "builtin") == 0))
rc = mutt_pager(banner, tempfile, do_color, info);
else
{
char cmd[STRING];
mutt_endwin();
mutt_file_expand_fmt_quote(cmd, sizeof(cmd), Pager, tempfile);
if (mutt_system(cmd) == -1)
{
mutt_error(_("Error running \"%s\""), cmd);
rc = -1;
}
else
rc = 0;
mutt_file_unlink(tempfile);
}
return rc;
}
/**
* mutt_enter_fname_full - Ask the user to select a file
* @param[in] prompt Prompt
* @param[in] buf Buffer for the result
* @param[in] buflen Length of the buffer
* @param[in] mailbox If true, select mailboxes
* @param[in] multiple Allow multiple selections
* @param[out] files List of files selected
* @param[out] numfiles Number of files selected
* @param[in] flags Flags, e.g. #MUTT_SEL_FOLDER
* @retval 0 Success
* @retval -1 Error
*/
int mutt_enter_fname_full(const char *prompt, char *buf, size_t buflen, bool mailbox,
bool multiple, char ***files, int *numfiles, int flags)
{
struct Event ch;
SETCOLOR(MT_COLOR_PROMPT);
mutt_window_mvaddstr(MuttMessageWindow, 0, 0, (char *) prompt);
addstr(_(" ('?' for list): "));
NORMAL_COLOR;
if (buf[0])
addstr(buf);
mutt_window_clrtoeol(MuttMessageWindow);
mutt_refresh();
do
{
ch = mutt_getch();
} while (ch.ch == -2);
if (ch.ch < 0)
{
mutt_window_clearline(MuttMessageWindow, 0);
return -1;
}
else if (ch.ch == '?')
{
mutt_refresh();
buf[0] = '\0';
if (!flags)
flags = MUTT_SEL_FOLDER;
if (multiple)
flags |= MUTT_SEL_MULTI;
if (mailbox)
flags |= MUTT_SEL_MAILBOX;
mutt_select_file(buf, buflen, flags, files, numfiles);
}
else
{
char *pc = mutt_mem_malloc(mutt_str_strlen(prompt) + 3);
sprintf(pc, "%s: ", prompt);
mutt_unget_event(ch.op ? 0 : ch.ch, ch.op ? ch.op : 0);
if (mutt_get_field_full(pc, buf, buflen, (mailbox ? MUTT_EFILE : MUTT_FILE) | MUTT_CLEAR,
multiple, files, numfiles) != 0)
{
buf[0] = '\0';
}
FREE(&pc);
#ifdef USE_NOTMUCH
if ((flags & MUTT_SEL_VFOLDER) && buf[0] && (strncmp(buf, "notmuch://", 10) != 0))
nm_description_to_path(buf, buf, buflen);
#endif
}
return 0;
}
/**
* mutt_unget_event - Return a keystroke to the input buffer
* @param ch Key press
* @param op Operation, e.g. OP_DELETE
*
* This puts events into the `UngetKeyEvents` buffer
*/
void mutt_unget_event(int ch, int op)
{
struct Event tmp;
tmp.ch = ch;
tmp.op = op;
if (UngetCount >= UngetLen)
mutt_mem_realloc(&UngetKeyEvents, (UngetLen += 16) * sizeof(struct Event));
UngetKeyEvents[UngetCount++] = tmp;
}
/**
* mutt_unget_string - Return a string to the input buffer
* @param s String to return
*
* This puts events into the `UngetKeyEvents` buffer
*/
void mutt_unget_string(const char *s)
{
const char *p = s + mutt_str_strlen(s) - 1;
while (p >= s)
{
mutt_unget_event((unsigned char) *p--, 0);
}
}
/**
* mutt_push_macro_event - Add the character/operation to the macro buffer
* @param ch Character to add
* @param op Operation to add
*
* Adds the ch/op to the macro buffer.
* This should be used for macros, push, and exec commands only.
*/
void mutt_push_macro_event(int ch, int op)
{
struct Event tmp;
tmp.ch = ch;
tmp.op = op;
if (MacroBufferCount >= MacroBufferLen)
mutt_mem_realloc(&MacroEvents, (MacroBufferLen += 128) * sizeof(struct Event));
MacroEvents[MacroBufferCount++] = tmp;
}
/**
* mutt_flush_macro_to_endcond - Drop a macro from the input buffer
*
* All the macro text is deleted until an OP_END_COND command,
* or the buffer is empty.
*/
void mutt_flush_macro_to_endcond(void)
{
UngetCount = 0;
while (MacroBufferCount > 0)
{
if (MacroEvents[--MacroBufferCount].op == OP_END_COND)
return;
}
}
/**
* mutt_flush_unget_to_endcond - Clear entries from UngetKeyEvents
*
* Normally, OP_END_COND should only be in the MacroEvent buffer.
* km_error_key() (ab)uses OP_END_COND as a barrier in the unget buffer, and
* calls this function to flush.
*/
void mutt_flush_unget_to_endcond(void)
{
while (UngetCount > 0)
{
if (UngetKeyEvents[--UngetCount].op == OP_END_COND)
return;
}
}
/**
* mutt_flushinp - Empty all the keyboard buffers
*/
void mutt_flushinp(void)
{
UngetCount = 0;
MacroBufferCount = 0;
flushinp();
}
#if (defined(USE_SLANG_CURSES) || defined(HAVE_CURS_SET))
/**
* mutt_curs_set - Set the cursor position
* @param cursor
* * -1: restore the value of the last call
* * 0: make the cursor invisible
* * 1: make the cursor visible
*/
void mutt_curs_set(int cursor)
{
static int SavedCursor = 1;
if (cursor < 0)
cursor = SavedCursor;
else
SavedCursor = cursor;
if (curs_set(cursor) == ERR)
{
if (cursor == 1) /* cnorm */
curs_set(2); /* cvvis */
}
}
#endif
/**
* mutt_multi_choice - Offer the user a multiple choice question
* @param prompt Message prompt
* @param letters Allowable selection keys
* @retval >=0 0-based user selection
* @retval -1 Selection aborted
*/
int mutt_multi_choice(const char *prompt, const char *letters)
{
struct Event ch;
int choice;
bool redraw = true;
int prompt_lines = 1;
char *p = NULL;
while (true)
{
if (redraw || SigWinch)
{
redraw = false;
if (SigWinch)
{
SigWinch = 0;
mutt_resize_screen();
clearok(stdscr, TRUE);
mutt_menu_current_redraw();
}
if (MuttMessageWindow->cols)
{
prompt_lines = (mutt_strwidth(prompt) + MuttMessageWindow->cols - 1) /
MuttMessageWindow->cols;
prompt_lines = MAX(1, MIN(3, prompt_lines));
}
if (prompt_lines != MuttMessageWindow->rows)
{
mutt_window_reflow_message_rows(prompt_lines);
mutt_menu_current_redraw();
}
SETCOLOR(MT_COLOR_PROMPT);
mutt_window_mvaddstr(MuttMessageWindow, 0, 0, prompt);
NORMAL_COLOR;
mutt_window_clrtoeol(MuttMessageWindow);
}
mutt_refresh();
/* SigWinch is not processed unless timeout is set */
mutt_getch_timeout(30 * 1000);
ch = mutt_getch();
mutt_getch_timeout(-1);
if (ch.ch == -2)
continue;
/* (ch.ch == 0) is technically possible. Treat the same as < 0 (abort) */
if (ch.ch <= 0 || CI_is_return(ch.ch))
{
choice = -1;
break;
}
else
{
p = strchr(letters, ch.ch);
if (p)
{
choice = p - letters + 1;
break;
}
else if (ch.ch <= '9' && ch.ch > '0')
{
choice = ch.ch - '0';
if (choice <= mutt_str_strlen(letters))
break;
}
}
BEEP();
}
if (MuttMessageWindow->rows != 1)
{
mutt_window_reflow_message_rows(1);
mutt_menu_current_redraw();
}
else
mutt_window_clearline(MuttMessageWindow, 0);
mutt_refresh();
return choice;
}
/**
* mutt_addwch - addwch would be provided by an up-to-date curses library
* @param wc Wide char to display
* @retval 0 Success
* @retval -1 Error
*/
int mutt_addwch(wchar_t wc)
{
char buf[MB_LEN_MAX * 2];
mbstate_t mbstate;
size_t n1, n2;
memset(&mbstate, 0, sizeof(mbstate));
if ((n1 = wcrtomb(buf, wc, &mbstate)) == (size_t)(-1) ||
(n2 = wcrtomb(buf + n1, 0, &mbstate)) == (size_t)(-1))
{
return -1; /* ERR */
}
else
{
return addstr(buf);
}
}
/**
* mutt_simple_format - Format a string, like snprintf()
* @param[out] buf Buffer in which to save string
* @param[in] buflen Buffer length
* @param[in] min_width Minimum width
* @param[in] max_width Maximum width
* @param[in] justify Justification, e.g. #FMT_RIGHT
* @param[in] pad_char Padding character
* @param[in] s String to format
* @param[in] n Number of bytes of string to format
* @param[in] arboreal If true, string contains graphical tree characters
*
* This formats a string, a bit like snprintf(buf, buflen, "%-*.*s",
* min_width, max_width, s), except that the widths refer to the number of
* character cells when printed.
*/
void mutt_simple_format(char *buf, size_t buflen, int min_width, int max_width,
int justify, char pad_char, const char *s, size_t n, int arboreal)
{
wchar_t wc;
int w;
size_t k, k2;
char scratch[MB_LEN_MAX];
mbstate_t mbstate1, mbstate2;
int escaped = 0;
memset(&mbstate1, 0, sizeof(mbstate1));
memset(&mbstate2, 0, sizeof(mbstate2));
buflen--;
char *p = buf;
for (; n && (k = mbrtowc(&wc, s, n, &mbstate1)); s += k, n -= k)
{
if (k == (size_t)(-1) || k == (size_t)(-2))
{
if (k == (size_t)(-1) && errno == EILSEQ)
memset(&mbstate1, 0, sizeof(mbstate1));
k = (k == (size_t)(-1)) ? 1 : n;
wc = ReplacementChar;
}
if (escaped)
{
escaped = 0;
w = 0;
}
else if (arboreal && wc == MUTT_SPECIAL_INDEX)
{
escaped = 1;
w = 0;
}
else if (arboreal && wc < MUTT_TREE_MAX)
{
w = 1; /* hack */
}
else
{
#ifdef HAVE_ISWBLANK
if (iswblank(wc))
wc = ' ';
else
#endif
if (!IsWPrint(wc))
wc = '?';
w = wcwidth(wc);
}
if (w >= 0)
{
if (w > max_width || (k2 = wcrtomb(scratch, wc, &mbstate2)) > buflen)
continue;
min_width -= w;
max_width -= w;
strncpy(p, scratch, k2);
p += k2;
buflen -= k2;
}
}
w = (int) buflen < min_width ? buflen : min_width;
if (w <= 0)
*p = '\0';
else if (justify == FMT_RIGHT) /* right justify */
{
p[w] = '\0';
while (--p >= buf)
p[w] = *p;
while (--w >= 0)
buf[w] = pad_char;
}
else if (justify == FMT_CENTER) /* center */
{
char *savedp = p;
int half = (w + 1) / 2; /* half of cushion space */
p[w] = '\0';
/* move str to center of buffer */
while (--p >= buf)
p[half] = *p;
/* fill rhs */
p = savedp + half;
while (--w >= half)
*p++ = pad_char;
/* fill lhs */
while (half--)