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keymap.c
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/**
* @file
* Manage keymappings
*
* @authors
* Copyright (C) 1996-2000,2002,2010-2011 Michael R. Elkins <[email protected]>
*
* @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/>.
*/
/**
* @page neo_keymap Manage keymappings
*
* Manage keymappings
*/
#include "config.h"
#include <ctype.h>
#include <limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mutt/lib.h"
#include "config/lib.h"
#include "core/lib.h"
#include "gui/lib.h"
#include "mutt.h"
#include "keymap.h"
#include "menu/lib.h"
#include "ncrypt/lib.h"
#include "functions.h"
#include "init.h"
#include "mutt_commands.h"
#include "mutt_globals.h"
#include "mutt_logging.h"
#include "opcodes.h"
#include "options.h"
#ifndef USE_SLANG_CURSES
#include <strings.h>
#endif
#ifdef USE_IMAP
#include "imap/lib.h"
#endif
#ifdef USE_INOTIFY
#include "monitor.h"
#endif
/**
* KeyNames - Key name lookup table
*/
static struct Mapping KeyNames[] = {
{ "<PageUp>", KEY_PPAGE },
{ "<PageDown>", KEY_NPAGE },
{ "<Up>", KEY_UP },
{ "<Down>", KEY_DOWN },
{ "<Right>", KEY_RIGHT },
{ "<Left>", KEY_LEFT },
{ "<Delete>", KEY_DC },
{ "<BackSpace>", KEY_BACKSPACE },
{ "<Insert>", KEY_IC },
{ "<Home>", KEY_HOME },
{ "<End>", KEY_END },
{ "<Enter>", '\n' },
{ "<Return>", '\r' },
{ "<Esc>", '\033' }, // Escape
{ "<Tab>", '\t' },
{ "<Space>", ' ' },
#ifdef KEY_BTAB
{ "<BackTab>", KEY_BTAB },
#endif
#ifdef KEY_NEXT
{ "<Next>", KEY_NEXT },
#endif
#ifdef NCURSES_VERSION
/* extensions supported by ncurses. values are filled in during initialization */
/* CTRL+key */
{ "<C-Up>", -1 },
{ "<C-Down>", -1 },
{ "<C-Left>", -1 },
{ "<C-Right>", -1 },
{ "<C-Home>", -1 },
{ "<C-End>", -1 },
{ "<C-Next>", -1 },
{ "<C-Prev>", -1 },
/* SHIFT+key */
{ "<S-Up>", -1 },
{ "<S-Down>", -1 },
{ "<S-Left>", -1 },
{ "<S-Right>", -1 },
{ "<S-Home>", -1 },
{ "<S-End>", -1 },
{ "<S-Next>", -1 },
{ "<S-Prev>", -1 },
/* ALT+key */
{ "<A-Up>", -1 },
{ "<A-Down>", -1 },
{ "<A-Left>", -1 },
{ "<A-Right>", -1 },
{ "<A-Home>", -1 },
{ "<A-End>", -1 },
{ "<A-Next>", -1 },
{ "<A-Prev>", -1 },
#endif /* NCURSES_VERSION */
{ NULL, 0 },
};
int LastKey; ///< contains the last key the user pressed
keycode_t AbortKey; ///< code of key to abort prompts, normally Ctrl-G
struct KeymapList Keymaps[MENU_MAX];
#ifdef NCURSES_VERSION
/**
* struct Extkey - Map key names from NeoMutt's style to Curses style
*/
struct Extkey
{
const char *name;
const char *sym;
};
static const struct Extkey ExtKeys[] = {
{ "<c-up>", "kUP5" },
{ "<s-up>", "kUP" },
{ "<a-up>", "kUP3" },
{ "<s-down>", "kDN" },
{ "<a-down>", "kDN3" },
{ "<c-down>", "kDN5" },
{ "<c-right>", "kRIT5" },
{ "<s-right>", "kRIT" },
{ "<a-right>", "kRIT3" },
{ "<s-left>", "kLFT" },
{ "<a-left>", "kLFT3" },
{ "<c-left>", "kLFT5" },
{ "<s-home>", "kHOM" },
{ "<a-home>", "kHOM3" },
{ "<c-home>", "kHOM5" },
{ "<s-end>", "kEND" },
{ "<a-end>", "kEND3" },
{ "<c-end>", "kEND5" },
{ "<s-next>", "kNXT" },
{ "<a-next>", "kNXT3" },
{ "<c-next>", "kNXT5" },
{ "<s-prev>", "kPRV" },
{ "<a-prev>", "kPRV3" },
{ "<c-prev>", "kPRV5" },
{ 0, 0 },
};
#endif
/**
* mutt_keymap_free - Free a Keymap
* @param km Keymap to free
*/
static void mutt_keymap_free(struct Keymap **km)
{
if (!km || !*km)
return;
FREE(&(*km)->macro);
FREE(&(*km)->desc);
FREE(&(*km)->keys);
FREE(km);
}
/**
* mutt_keymaplist_free - Free a List of Keymaps
* @param km_list List of Keymaps to free
*/
static void mutt_keymaplist_free(struct KeymapList *km_list)
{
struct Keymap *np = NULL, *tmp = NULL;
STAILQ_FOREACH_SAFE(np, km_list, entries, tmp)
{
STAILQ_REMOVE(km_list, np, Keymap, entries);
mutt_keymap_free(&np);
}
}
/**
* alloc_keys - Allocate space for a sequence of keys
* @param len Number of keys
* @param keys Array of keys
* @retval ptr Sequence of keys
*/
static struct Keymap *alloc_keys(size_t len, keycode_t *keys)
{
struct Keymap *p = mutt_mem_calloc(1, sizeof(struct Keymap));
p->len = len;
p->keys = mutt_mem_calloc(len, sizeof(keycode_t));
memcpy(p->keys, keys, len * sizeof(keycode_t));
return p;
}
/**
* parse_fkey - Parse a function key string
* @param s String to parse
* @retval num Number of the key
*
* Given "<f8>", it will return 8.
*/
static int parse_fkey(char *s)
{
char *t = NULL;
int n = 0;
if ((s[0] != '<') || (tolower(s[1]) != 'f'))
return -1;
for (t = s + 2; *t && isdigit((unsigned char) *t); t++)
{
n *= 10;
n += *t - '0';
}
if (*t != '>')
return -1;
return n;
}
/**
* parse_keycode - Parse a numeric keycode
* @param s String to parse
* @retval num Number of the key
*
* This function parses the string `<NNN>` and uses the octal value as the key
* to bind.
*/
static int parse_keycode(const char *s)
{
char *end_char = NULL;
long int result = strtol(s + 1, &end_char, 8);
/* allow trailing whitespace, eg. < 1001 > */
while (IS_SPACE(*end_char))
end_char++;
/* negative keycodes don't make sense, also detect overflow */
if ((*end_char != '>') || (result < 0) || (result == LONG_MAX))
{
return -1;
}
return result;
}
/**
* parsekeys - Parse a key string into key codes
* @param str Key string
* @param d Array for key codes
* @param max Maximum length of key sequence
* @retval num Length of key sequence
*/
static size_t parsekeys(const char *str, keycode_t *d, size_t max)
{
int n;
size_t len = max;
char buf[128];
char c;
char *t = NULL;
mutt_str_copy(buf, str, sizeof(buf));
char *s = buf;
while (*s && len)
{
*d = '\0';
if ((*s == '<') && (t = strchr(s, '>')))
{
t++;
c = *t;
*t = '\0';
n = mutt_map_get_value(s, KeyNames);
if (n != -1)
{
s = t;
*d = n;
}
else if ((n = parse_fkey(s)) > 0)
{
s = t;
*d = KEY_F(n);
}
else if ((n = parse_keycode(s)) > 0)
{
s = t;
*d = n;
}
*t = c;
}
if (!*d)
{
*d = (unsigned char) *s;
s++;
}
d++;
len--;
}
return max - len;
}
/**
* km_compare_keys - Compare two keymaps' keyscodes and return the bigger one
* @param k1 first keymap to compare
* @param k2 second keymap to compare
* @param pos position where the two keycodes differ
* @retval ptr Keymap with a bigger ASCII keycode
*/
static struct Keymap *km_compare_keys(struct Keymap *k1, struct Keymap *k2, size_t *pos)
{
while (*pos < k1->len && *pos < k2->len)
{
if (k1->keys[*pos] < k2->keys[*pos])
return k2;
else if (k1->keys[*pos] > k2->keys[*pos])
return k1;
else
*pos = *pos + 1;
}
return NULL;
}
/**
* km_bind_err - Set up a key binding
* @param s Key string
* @param mtype Menu type, e.g. #MENU_EDITOR
* @param op Operation, e.g. OP_DELETE
* @param macro Macro string
* @param desc Description of macro (OPTIONAL)
* @param err Buffer for error message
* @retval #CommandResult Result e.g. #MUTT_CMD_SUCCESS
*
* Insert a key sequence into the specified map.
* The map is sorted by ASCII value (lowest to highest)
*/
static enum CommandResult km_bind_err(const char *s, enum MenuType mtype, int op,
char *macro, char *desc, struct Buffer *err)
{
enum CommandResult rc = MUTT_CMD_SUCCESS;
struct Keymap *last = NULL, *np = NULL, *compare = NULL;
keycode_t buf[MAX_SEQ];
size_t pos = 0, lastpos = 0;
size_t len = parsekeys(s, buf, MAX_SEQ);
struct Keymap *map = alloc_keys(len, buf);
map->op = op;
map->macro = mutt_str_dup(macro);
map->desc = mutt_str_dup(desc);
/* find position to place new keymap */
STAILQ_FOREACH(np, &Keymaps[mtype], entries)
{
compare = km_compare_keys(map, np, &pos);
if (compare == map) /* map's keycode is bigger */
{
last = np;
lastpos = pos;
if (pos > np->eq)
pos = np->eq;
}
else if (compare == np) /* np's keycode is bigger, found insert location */
{
map->eq = pos;
break;
}
else /* equal keycodes */
{
/* Don't warn on overwriting a 'noop' binding */
if ((np->len != len) && (np->op != OP_NULL))
{
/* Overwrite with the different lengths, warn */
/* TODO: MAX_SEQ here is wrong */
char old_binding[MAX_SEQ];
char new_binding[MAX_SEQ];
km_expand_key(old_binding, MAX_SEQ, map);
km_expand_key(new_binding, MAX_SEQ, np);
char *err_msg =
_("Binding '%s' will alias '%s' Before, try: 'bind %s %s noop' "
"https://neomutt.org/guide/configuration.html#bind-warnings");
if (err)
{
/* err was passed, put the string there */
snprintf(err->data, err->dsize, err_msg, old_binding, new_binding,
mutt_map_get_name(mtype, MenuNames), new_binding);
}
else
{
mutt_error(err_msg, old_binding, new_binding,
mutt_map_get_name(mtype, MenuNames), new_binding);
}
rc = MUTT_CMD_WARNING;
}
map->eq = np->eq;
STAILQ_REMOVE(&Keymaps[mtype], np, Keymap, entries);
mutt_keymap_free(&np);
break;
}
}
if (last) /* if queue has at least one entry */
{
if (STAILQ_NEXT(last, entries))
STAILQ_INSERT_AFTER(&Keymaps[mtype], last, map, entries);
else /* last entry in the queue */
STAILQ_INSERT_TAIL(&Keymaps[mtype], map, entries);
last->eq = lastpos;
}
else /* queue is empty, so insert from head */
{
STAILQ_INSERT_HEAD(&Keymaps[mtype], map, entries);
}
return rc;
}
/**
* km_bind - Bind a key to a macro
* @param s Key string
* @param mtype Menu type, e.g. #MENU_EDITOR
* @param op Operation, e.g. OP_DELETE
* @param macro Macro string
* @param desc Description of macro (OPTIONAL)
* @retval #CommandResult Result e.g. #MUTT_CMD_SUCCESS
*/
enum CommandResult km_bind(char *s, enum MenuType mtype, int op, char *macro, char *desc)
{
return km_bind_err(s, mtype, op, macro, desc, NULL);
}
/**
* km_bindkey_err - Bind a key in a Menu to an operation (with error message)
* @param s Key string
* @param mtype Menu type, e.g. #MENU_PAGER
* @param op Operation, e.g. OP_DELETE
* @param err Buffer for error message
* @retval #CommandResult Result e.g. #MUTT_CMD_SUCCESS
*/
static enum CommandResult km_bindkey_err(const char *s, enum MenuType mtype,
int op, struct Buffer *err)
{
return km_bind_err(s, mtype, op, NULL, NULL, err);
}
/**
* km_bindkey - Bind a key in a Menu to an operation
* @param s Key string
* @param mtype Menu type, e.g. #MENU_PAGER
* @param op Operation, e.g. OP_DELETE
* @retval #CommandResult Result e.g. #MUTT_CMD_SUCCESS
*/
static enum CommandResult km_bindkey(const char *s, enum MenuType mtype, int op)
{
return km_bindkey_err(s, mtype, op, NULL);
}
/**
* get_op - Get the function by its name
* @param bindings Key bindings table
* @param start Name of function to find
* @param len Length of string to match
* @retval num Operation, e.g. OP_DELETE
*/
static int get_op(const struct Binding *bindings, const char *start, size_t len)
{
for (int i = 0; bindings[i].name; i++)
{
if (mutt_istrn_equal(start, bindings[i].name, len) &&
(mutt_str_len(bindings[i].name) == len))
{
return bindings[i].op;
}
}
return OP_NULL;
}
/**
* mutt_get_func - Get the name of a function
* @param bindings Key bindings table
* @param op Operation, e.g. OP_DELETE
* @retval ptr Name of function
* @retval NULL Operation not found
*
* @note This returns a static string.
*/
const char *mutt_get_func(const struct Binding *bindings, int op)
{
for (int i = 0; bindings[i].name; i++)
{
if (bindings[i].op == op)
return bindings[i].name;
}
return NULL;
}
/**
* generic_tokenize_push_string - Parse and queue a 'push' command
* @param s String to push into the key queue
* @param generic_push Callback function to add events to macro queue
*
* Parses s for `<function>` syntax and adds the whole sequence to either the
* macro or unget buffer. This function is invoked by the next two defines
* below.
*/
static void generic_tokenize_push_string(char *s, void (*generic_push)(int, int))
{
char *pp = NULL;
char *p = s + mutt_str_len(s) - 1;
size_t l;
int i, op = OP_NULL;
while (p >= s)
{
/* if we see something like "<PageUp>", look to see if it is a real
* function name and return the corresponding value */
if (*p == '>')
{
for (pp = p - 1; pp >= s && *pp != '<'; pp--)
; // do nothing
if (pp >= s)
{
i = parse_fkey(pp);
if (i > 0)
{
generic_push(KEY_F(i), 0);
p = pp - 1;
continue;
}
l = p - pp + 1;
for (i = 0; KeyNames[i].name; i++)
{
if (mutt_istrn_equal(pp, KeyNames[i].name, l))
break;
}
if (KeyNames[i].name)
{
/* found a match */
generic_push(KeyNames[i].value, 0);
p = pp - 1;
continue;
}
/* See if it is a valid command
* skip the '<' and the '>' when comparing */
for (enum MenuType j = 0; MenuNames[j].name; j++)
{
const struct Binding *binding = km_get_table(MenuNames[j].value);
if (binding)
{
op = get_op(binding, pp + 1, l - 2);
if (op != OP_NULL)
break;
}
}
if (op != OP_NULL)
{
generic_push(0, op);
p = pp - 1;
continue;
}
}
}
generic_push((unsigned char) *p--, 0); /* independent 8 bits chars */
}
}
/**
* retry_generic - Try to find the key in the generic menu bindings
* @param mtype Menu type, e.g. #MENU_PAGER
* @param keys Array of keys to return to the input queue
* @param keyslen Number of keys in the array
* @param lastkey Last key pressed (to return to input queue)
* @retval num Operation, e.g. OP_DELETE
*/
static int retry_generic(enum MenuType mtype, keycode_t *keys, int keyslen, int lastkey)
{
if ((mtype != MENU_EDITOR) && (mtype != MENU_GENERIC) && (mtype != MENU_PAGER))
{
if (lastkey)
mutt_unget_event(lastkey, 0);
for (; keyslen; keyslen--)
mutt_unget_event(keys[keyslen - 1], 0);
return km_dokey(MENU_GENERIC);
}
if (mtype != MENU_EDITOR)
{
/* probably a good idea to flush input here so we can abort macros */
mutt_flushinp();
}
return OP_NULL;
}
/**
* km_dokey - Determine what a keypress should do
* @param mtype Menu type, e.g. #MENU_EDITOR
* @retval >0 Function to execute
* @retval OP_NULL No function bound to key sequence
* @retval -1 Error occurred while reading input
* @retval -2 A timeout or sigwinch occurred
*/
int km_dokey(enum MenuType mtype)
{
struct KeyEvent tmp;
struct Keymap *map = STAILQ_FIRST(&Keymaps[mtype]);
int pos = 0;
int n = 0;
if (!map && (mtype != MENU_EDITOR))
return retry_generic(mtype, NULL, 0, 0);
#ifdef USE_IMAP
const short c_imap_keepalive =
cs_subset_number(NeoMutt->sub, "imap_keepalive");
#endif
while (true)
{
const short c_timeout = cs_subset_number(NeoMutt->sub, "timeout");
int i = (c_timeout > 0) ? c_timeout : 60;
#ifdef USE_IMAP
/* keepalive may need to run more frequently than `$timeout` allows */
if (c_imap_keepalive)
{
if (c_imap_keepalive >= i)
imap_keepalive();
else
{
while (c_imap_keepalive && (c_imap_keepalive < i))
{
mutt_getch_timeout(c_imap_keepalive * 1000);
tmp = mutt_getch();
mutt_getch_timeout(-1);
/* If a timeout was not received, or the window was resized, exit the
* loop now. Otherwise, continue to loop until reaching a total of
* $timeout seconds. */
if ((tmp.ch != -2) || SigWinch)
goto gotkey;
#ifdef USE_INOTIFY
if (MonitorFilesChanged)
goto gotkey;
#endif
i -= c_imap_keepalive;
imap_keepalive();
}
}
}
#endif
mutt_getch_timeout(i * 1000);
tmp = mutt_getch();
mutt_getch_timeout(-1);
#ifdef USE_IMAP
gotkey:
#endif
/* hide timeouts, but not window resizes, from the line editor. */
if ((mtype == MENU_EDITOR) && (tmp.ch == -2) && !SigWinch)
continue;
LastKey = tmp.ch;
if (LastKey < 0)
return LastKey;
/* do we have an op already? */
if (tmp.op)
{
const char *func = NULL;
const struct Binding *bindings = NULL;
/* is this a valid op for this menu type? */
if ((bindings = km_get_table(mtype)) && (func = mutt_get_func(bindings, tmp.op)))
return tmp.op;
if ((mtype == MENU_EDITOR) && mutt_get_func(OpEditor, tmp.op))
return tmp.op;
if ((mtype != MENU_EDITOR) && (mtype != MENU_PAGER))
{
/* check generic menu type */
bindings = OpGeneric;
func = mutt_get_func(bindings, tmp.op);
if (func)
return tmp.op;
}
/* Sigh. Valid function but not in this context.
* Find the literal string and push it back */
for (i = 0; MenuNames[i].name; i++)
{
bindings = km_get_table(MenuNames[i].value);
if (bindings)
{
func = mutt_get_func(bindings, tmp.op);
if (func)
{
mutt_unget_event('>', 0);
mutt_unget_string(func);
mutt_unget_event('<', 0);
break;
}
}
}
/* continue to chew */
if (func)
continue;
}
if (!map)
return tmp.op;
/* Nope. Business as usual */
while (LastKey > map->keys[pos])
{
if ((pos > map->eq) || !STAILQ_NEXT(map, entries))
return retry_generic(mtype, map->keys, pos, LastKey);
map = STAILQ_NEXT(map, entries);
}
if (LastKey != map->keys[pos])
return retry_generic(mtype, map->keys, pos, LastKey);
if (++pos == map->len)
{
if (map->op != OP_MACRO)
return map->op;
/* OptIgnoreMacroEvents turns off processing the MacroEvents buffer
* in mutt_getch(). Generating new macro events during that time would
* result in undesired behavior once the option is turned off.
*
* Originally this returned -1, however that results in an unbuffered
* username or password prompt being aborted. Returning OP_NULL allows
* mutt_enter_string_full() to display the keybinding pressed instead.
*
* It may be unexpected for a macro's keybinding to be returned,
* but less so than aborting the prompt. */
if (OptIgnoreMacroEvents)
{
return OP_NULL;
}
if (n++ == 10)
{
mutt_flushinp();
mutt_error(_("Macro loop detected"));
return -1;
}
generic_tokenize_push_string(map->macro, mutt_push_macro_event);
map = STAILQ_FIRST(&Keymaps[mtype]);
pos = 0;
}
}
/* not reached */
}
/**
* create_bindings - Attach a set of keybindings to a Menu
* @param map Key bindings
* @param mtype Menu type, e.g. #MENU_PAGER
*/
static void create_bindings(const struct Binding *map, enum MenuType mtype)
{
STAILQ_INIT(&Keymaps[mtype]);
for (int i = 0; map[i].name; i++)
if (map[i].seq)
km_bindkey(map[i].seq, mtype, map[i].op);
}
/**
* km_keyname - Get the human name for a key
* @param c Key code
* @retval ptr Name of the key
*
* @note This returns a pointer to a static buffer.
*/
static const char *km_keyname(int c)
{
static char buf[35];
const char *p = mutt_map_get_name(c, KeyNames);
if (p)
return p;
if ((c < 256) && (c > -128) && iscntrl((unsigned char) c))
{
if (c < 0)
c += 256;
if (c < 128)
{
buf[0] = '^';
buf[1] = (c + '@') & 0x7f;
buf[2] = '\0';
}
else
snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6, (c >> 3) & 7, c & 7);
}
else if ((c >= KEY_F0) && (c < KEY_F(256))) /* this maximum is just a guess */
sprintf(buf, "<F%d>", c - KEY_F0);
else if (IsPrint(c))
snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
else
snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
return buf;
}
/**
* mutt_init_abort_key - Parse the abort_key config string
*
* Parse the string into `$abort_key` and put the keycode into AbortKey.
*/
void mutt_init_abort_key(void)
{
keycode_t buf[2];
const char *const c_abort_key = cs_subset_string(NeoMutt->sub, "abort_key");
size_t len = parsekeys(c_abort_key, buf, mutt_array_size(buf));
if (len == 0)
{
mutt_error(_("Abort key is not set, defaulting to Ctrl-G"));
AbortKey = ctrl('G');
return;
}
if (len > 1)
{
mutt_warning(
_("Specified abort key sequence (%s) will be truncated to first key"), c_abort_key);
}
AbortKey = buf[0];
}
/**
* main_config_observer - Notification that a Config Variable has changed - Implements ::observer_t
*/
int main_config_observer(struct NotifyCallback *nc)
{
if ((nc->event_type != NT_CONFIG) || !nc->event_data)
return -1;
if (nc->event_subtype == NT_CONFIG_INITIAL_SET)
return 0;
struct EventConfig *ev_c = nc->event_data;
if (!mutt_str_equal(ev_c->name, "abort_key"))
return 0;
mutt_init_abort_key();
mutt_debug(LL_DEBUG5, "config done\n");
return 0;
}
/**
* km_expand_key_string - Get a human-readable key string
* @param str Raw key string
* @param buf Buffer for the key string
* @param buflen Length of buffer
* @retval num Length of string
*/
static int km_expand_key_string(char *str, char *buf, size_t buflen)
{
size_t len = 0;
for (; *str; str++)
{
const char *key = km_keyname(*str);
size_t keylen = mutt_str_len(key);
mutt_str_copy(buf, key, buflen);
buf += keylen;
buflen -= keylen;
len += keylen;
}
return len;
}
/**
* km_expand_key - Get the key string bound to a Keymap
* @param s Buffer for the key string
* @param len Length of buffer
* @param map Keybinding map
* @retval 1 Success
* @retval 0 Error
*/
int km_expand_key(char *s, size_t len, struct Keymap *map)
{
if (!map)
return 0;
int p = 0;
while (true)
{
mutt_str_copy(s, km_keyname(map->keys[p]), len);
const size_t l = mutt_str_len(s);
len -= l;
if ((++p >= map->len) || !len)
return 1;
s += l;
}
/* not reached */
}
/**
* km_find_func - Find a function's mapping in a Menu
* @param mtype Menu type, e.g. #MENU_PAGER
* @param func Function, e.g. OP_DELETE
* @retval ptr Keymap for the function
*/
struct Keymap *km_find_func(enum MenuType mtype, int func)
{
struct Keymap *np = NULL;
STAILQ_FOREACH(np, &Keymaps[mtype], entries)
{
if (np->op == func)
break;
}
return np;
}
#ifdef NCURSES_VERSION
/**
* find_ext_name - Find the curses name for a key
* @param key Key name
* @retval ptr Curses name
*
* Look up NeoMutt's name for a key and find the ncurses extended name for it.
*
* @note This returns a static string.
*/
static const char *find_ext_name(const char *key)
{
for (int j = 0; ExtKeys[j].name; j++)
{
if (strcasecmp(key, ExtKeys[j].name) == 0)
return ExtKeys[j].sym;
}
return 0;
}
#endif /* NCURSES_VERSION */
/**
* init_extended_keys - Initialise map of ncurses extended keys
*
* Determine the keycodes for ncurses extended keys and fill in the KeyNames array.
*
* This function must be called *after* initscr(), or tigetstr() returns -1.
* This creates a bit of a chicken-and-egg problem because km_init() is called
* prior to start_curses(). This means that the default keybindings can't
* include any of the extended keys because they won't be defined until later.
*/
void init_extended_keys(void)
{
#ifdef NCURSES_VERSION
use_extended_names(true);
for (int j = 0; KeyNames[j].name; j++)
{
if (KeyNames[j].value == -1)
{
const char *keyname = find_ext_name(KeyNames[j].name);