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refactor parse_keys

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This commit is contained in:
Maxime Coste 2014-11-09 13:02:01 +00:00
parent 766df0490c
commit 40d649f836
1 changed files with 47 additions and 65 deletions
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112
src/keys.cc
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@ -41,75 +41,57 @@ static const KeyAndName keynamemap[] = {
KeyList parse_keys(StringView str)
{
KeyList result;
using PassPolicy = utf8::InvalidPolicy::Pass;
using Utf8It = utf8::iterator<const char*, PassPolicy>;
using Utf8It = utf8::iterator<const char*>;
for (Utf8It it = str.begin(), str_end = str.end(); it < str_end; ++it)
{
if (*it == '<')
if (*it != '<')
{
Utf8It end_it = it;
while (end_it < str_end and *end_it != '>')
++end_it;
if (end_it < str_end)
{
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] == '-')
{
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))
{
Key key = canonicalize_ifn(Key{ modifier, name_it->second });
result.push_back(key);
it = end_it;
continue;
}
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;
continue;
}
}
}
result.push_back({Key::Modifiers::None, *it});
continue;
}
result.push_back({Key::Modifiers::None, *it});
Utf8It end_it = it;
skip_while(end_it, str_end, [](char c) { return c != '>'; });
if (end_it == str_end)
{
result.push_back({Key::Modifiers::None, *it});
continue;
}
Key::Modifiers modifier = Key::Modifiers::None;
StringView desc{it.base()+1, end_it.base()};
if (desc.length() > 2 and desc[1] == '-')
{
switch(tolower(desc[0]))
{
case 'c': modifier = Key::Modifiers::Control; break;
case 'a': modifier = Key::Modifiers::Alt; break;
default:
throw runtime_error("unable to parse modifier in " +
StringView{it.base(), end_it.base()+1});
}
desc = desc.substr(2_byte);
}
auto name_it = find_if(keynamemap, [&desc](const KeyAndName& item)
{ return item.first == desc; });
if (name_it != end(keynamemap))
result.push_back(canonicalize_ifn({ modifier, name_it->second }));
else if (desc.char_length() == 1)
result.push_back(Key{ modifier, desc[0_char] });
else if (tolower(desc[0]) == 'f' and desc.length() <= 3)
{
int val = str_to_int(desc.substr(1_byte));
if (val >= 1 and val <= 12)
result.push_back(Key{ modifier, Key::F1 + (val - 1) });
else
throw runtime_error("Only F1 through F12 are supported");
}
else
throw runtime_error("Failed to parse " +
StringView{it.base(), end_it.base()+1});
it = end_it;
}
return result;
}