kakoune/src/keys.cc

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#include "keys.hh"
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#include "utils.hh"
#include "utf8_iterator.hh"
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namespace Kakoune
{
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Key canonicalize_ifn(Key key)
{
if (key.key > 0 and key.key < 27)
{
kak_assert(key.modifiers == Key::Modifiers::None);
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key.modifiers = Key::Modifiers::Control;
key.key = key.key - 1 + 'a';
}
return key;
}
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using KeyAndName = std::pair<const char*, Codepoint>;
static const KeyAndName keynamemap[] = {
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{ "ret", '\r' },
{ "space", ' ' },
{ "tab", '\t' },
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{ "lt", '<' },
{ "gt", '>' },
{ "backspace", Key::Backspace},
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{ "esc", Key::Escape },
{ "up", Key::Up },
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{ "down", Key::Down},
{ "left", Key::Left },
{ "right", Key::Right },
{ "pageup", Key::PageUp },
{ "pagedown", Key::PageDown },
{ "home", Key::Home },
{ "end", Key::End },
{ "backtab", Key::BackTab },
{ "del", Key::Delete },
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};
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KeyList parse_keys(StringView str)
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{
KeyList result;
using PassPolicy = utf8::InvalidPolicy::Pass;
using Utf8It = utf8::iterator<const char*, PassPolicy>;
for (Utf8It it = str.begin(), str_end = str.end(); it < str_end; ++it)
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{
if (*it == '<')
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{
Utf8It end_it = it;
while (end_it < str_end and *end_it != '>')
++end_it;
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if (end_it < str_end)
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{
Key::Modifiers modifier = Key::Modifiers::None;
StringView keyname{it.base()+1, end_it.base()};
if (keyname.length() > 2)
{
if (tolower(keyname[0]) == 'c' and keyname[1] == '-')
{
modifier = Key::Modifiers::Control;
keyname = keyname.substr(2_byte);
}
if (tolower(keyname[0]) == 'a' and keyname[1] == '-')
{
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modifier = Key::Modifiers::Alt;
keyname = keyname.substr(2_byte);
}
}
if (keyname.char_length() == 1)
{
result.push_back(Key{ modifier, utf8::codepoint<PassPolicy>(keyname.begin(),keyname.end()) });
it = end_it;
continue;
}
auto name_it = find_if(keynamemap, [&keyname](const KeyAndName& item)
{ return item.first == keyname; });
if (name_it != end(keynamemap))
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{
Key key = canonicalize_ifn(Key{ modifier, name_it->second });
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result.push_back(key);
it = end_it;
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continue;
}
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if ((keyname[0] == 'f' or keyname[0] == 'F') and
keyname.length() <= 3)
{
int val = 0;
for (auto i = 1_byte; i < keyname.length(); ++i)
{
char c = keyname[i];
if (c >= '0' and c <= '9')
val = val*10 + c - '0';
else
{
val = -1;
break;
}
}
if (val >= 1 and val <= 12)
{
result.push_back(Key{ modifier, Key::F1 + (val - 1) });
it = end_it;
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continue;
}
}
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}
}
result.push_back({Key::Modifiers::None, *it});
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}
return result;
}
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String key_to_str(Key key)
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{
bool named = false;
String res;
auto it = find_if(keynamemap, [&key](const KeyAndName& item)
{ return item.second == key.key; });
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if (it != end(keynamemap))
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{
named = true;
res = it->first;
}
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else if (key.key >= Key::F1 and key.key < Key::F12)
{
named = true;
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res = "F" + to_string((int)(key.key - Key::F1 + 1));
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}
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else
res = codepoint_to_str(key.key);
switch (key.modifiers)
{
case Key::Modifiers::Control: res = "c-" + res; named = true; break;
case Key::Modifiers::Alt: res = "a-" + res; named = true; break;
default: break;
}
if (named)
res = '<' + res + '>';
return res;
}
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}