kakoune/src/face_registry.cc

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#include "face_registry.hh"
#include "containers.hh"
#include "exception.hh"
#include "containers.hh"
namespace Kakoune
{
static Face parse_face(StringView facedesc)
{
constexpr StringView invalid_face_error = "invalid face description, expected <fg>[,<bg>][+<attr>]";
auto bg_it = find(facedesc, ',');
auto attr_it = find(facedesc, '+');
if (bg_it != facedesc.end()
and (attr_it < bg_it or (bg_it + 1) == facedesc.end()))
throw runtime_error(invalid_face_error.str());
if (attr_it != facedesc.end()
and (attr_it + 1) == facedesc.end())
throw runtime_error(invalid_face_error.str());
Face res;
res.fg = attr_it != facedesc.begin() ?
str_to_color({facedesc.begin(), std::min(attr_it, bg_it)}) : Color::Default;
if (bg_it != facedesc.end())
res.bg = bg_it+1 != attr_it ? str_to_color({bg_it+1, attr_it}) : Color::Default;
if (attr_it != facedesc.end())
{
for (++attr_it; attr_it != facedesc.end(); ++attr_it)
{
switch (*attr_it)
{
case 'e': res.attributes |= Attribute::Exclusive; break;
case 'u': res.attributes |= Attribute::Underline; break;
case 'r': res.attributes |= Attribute::Reverse; break;
case 'b': res.attributes |= Attribute::Bold; break;
case 'B': res.attributes |= Attribute::Blink; break;
case 'd': res.attributes |= Attribute::Dim; break;
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case 'i': res.attributes |= Attribute::Italic; break;
default: throw runtime_error(format("unknown face attribute '{}'", StringView{*attr_it}));
}
}
}
return res;
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}
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Face FaceRegistry::operator[](const String& facedesc)
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{
auto it = m_aliases.find(facedesc);
while (it != m_aliases.end())
{
if (it->second.alias.empty())
return it->second.face;
it = m_aliases.find(it->second.alias);
}
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return parse_face(facedesc);
}
void FaceRegistry::register_alias(const String& name, const String& facedesc,
bool override)
{
if (not override and m_aliases.find(name) != m_aliases.end())
throw runtime_error(format("alias '{}' already defined", name));
if (name.empty() or is_color_name(name) or
std::any_of(name.begin(), name.end(),
[](char c){ return not isalnum(c); }))
throw runtime_error(format("invalid alias name: '{}'", name));
if (name == facedesc)
throw runtime_error(format("cannot alias face '{}' to itself", name));
FaceOrAlias& alias = m_aliases[name];
auto it = m_aliases.find(facedesc);
if (it != m_aliases.end())
{
while (it != m_aliases.end())
{
if (it->second.alias.empty())
break;
if (it->second.alias == name)
throw runtime_error("face cycle detected");
it = m_aliases.find(it->second.alias);
}
alias.alias = facedesc;
}
else
{
alias.alias = "";
alias.face = parse_face(facedesc);
}
}
CandidateList FaceRegistry::complete_alias_name(StringView prefix,
ByteCount cursor_pos) const
{
return complete(prefix, cursor_pos,
transformed(m_aliases,
[](const AliasMap::value_type& v) -> const String&
{ return v.first; }));
}
FaceRegistry::FaceRegistry()
: m_aliases{
{ "Default", Face{ Color::Default, Color::Default } },
{ "PrimarySelection", Face{ Color::White, Color::Blue } },
{ "SecondarySelection", Face{ Color::Black, Color::Blue } },
{ "PrimaryCursor", Face{ Color::Black, Color::White } },
{ "SecondaryCursor", Face{ Color::Black, Color::White } },
{ "LineNumbers", Face{ Color::Default, Color::Default } },
{ "LineNumberCursor", Face{ Color::Default, Color::Default, Attribute::Reverse } },
{ "MenuForeground", Face{ Color::White, Color::Blue } },
{ "MenuBackground", Face{ Color::Blue, Color::White } },
{ "MenuInfo", Face{ Color::Cyan, Color::Default } },
{ "Information", Face{ Color::Black, Color::Yellow } },
{ "Error", Face{ Color::Black, Color::Red } },
{ "StatusLine", Face{ Color::Cyan, Color::Default } },
{ "StatusLineMode", Face{ Color::Yellow, Color::Default } },
{ "StatusLineInfo", Face{ Color::Blue, Color::Default } },
{ "StatusLineValue", Face{ Color::Green, Color::Default } },
{ "StatusCursor", Face{ Color::Black, Color::Cyan } },
{ "Prompt", Face{ Color::Yellow, Color::Default } },
{ "MatchingChar", Face{ Color::Default, Color::Default, Attribute::Bold } },
{ "BufferPadding", Face{ Color::Blue, Color::Default, Attribute::Bold } },
}
{}
}