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Allow binding to custom key sequences

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And document this feature in the manual page.
This commit is contained in:
Přemysl Eric Janouch
2021-07-07 20:30:46 +02:00
parent 9056ef4194
commit fdb338fe12
3 changed files with 33 additions and 7 deletions
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24
sdn.cpp
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@@ -1,7 +1,7 @@
//
// sdn: simple directory navigator
//
// Copyright (c) 2017 - 2020, Přemysl Eric Janouch <p@janouch.name>
// Copyright (c) 2017 - 2021, Přemysl Eric Janouch <p@janouch.name>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted.
@@ -544,6 +544,7 @@ static struct {
map<string, wint_t, stringcaseless> name_to_key;
map<wint_t, string> key_to_name;
map<string, wint_t> custom_keys;
string action_names[ACTION_COUNT]; ///< Stylized action names
// Refreshed by reload():
@@ -1566,7 +1567,9 @@ fun parse_key (const string &key_name) -> wint_t {
c |= ALT;
p += 2;
}
if (!strncmp (p, "C-", 2)) {
if (g.name_to_key.count (p)) {
return c | g.name_to_key.at (p);
} else if (!strncmp (p, "C-", 2)) {
p += 2;
if (*p < '?' || *p > 'z') {
cerr << "bindings: invalid combination: " << key_name << endl;
@@ -1574,8 +1577,6 @@ fun parse_key (const string &key_name) -> wint_t {
}
c |= CTRL (toupper (*p));
p += 1;
} else if (g.name_to_key.count (p)) {
return c | g.name_to_key.at (p);
} else {
wchar_t w; mbstate_t mb {};
auto len = strlen (p) + 1, res = mbrtowc (&w, p, len, &mb);
@@ -1604,7 +1605,9 @@ fun learn_named_key (const string &name, wint_t key) {
fun load_bindings () {
learn_named_key ("space", ' ');
learn_named_key ("escape", 0x1b);
for (int kc = KEY_MIN; kc < KEY_MAX; kc++) {
int kc = 0;
for (kc = KEY_MIN; kc <= KEY_MAX; kc++) {
const char *name = keyname (kc);
if (!name)
continue;
@@ -1638,11 +1641,18 @@ fun load_bindings () {
if (tokens.empty ())
continue;
if (tokens.size () < 3) {
cerr << "bindings: expected: context binding action";
cerr << "bindings: expected: define name key-sequence"
" | context binding action";
continue;
}
auto context = tokens[0], key_name = tokens[1], action = tokens[2];
if (context == "define") {
// We haven't run initscr() yet, so define_key() would fail here
learn_named_key (key_name, SYM | (g.custom_keys[action] = ++kc));
continue;
}
auto m = g_binding_contexts.find (context);
if (m == g_binding_contexts.end ()) {
cerr << "bindings: invalid context: " << context << endl;
@@ -1754,6 +1764,8 @@ int main (int argc, char *argv[]) {
cerr << "cannot initialize screen" << endl;
return 1;
}
for (const auto &definition_kc : g.custom_keys)
define_key (definition_kc.first.c_str (), definition_kc.second);
load_colors ();
load_cmdline (argc, argv);