kakoune/src/face_registry.cc

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#include "face_registry.hh"
#include "exception.hh"
#include "ranges.hh"
#include "string_utils.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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}
String to_string(Attribute attributes)
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{
if (attributes == Attribute::Normal)
return "";
struct Attr { Attribute attr; StringView name; }
attrs[] {
{ Attribute::Exclusive, "e" },
{ Attribute::Underline, "u" },
{ Attribute::Reverse, "r" },
{ Attribute::Blink, "B" },
{ Attribute::Bold, "b" },
{ Attribute::Dim, "d" },
{ Attribute::Italic, "i" },
};
auto filteredAttrs = attrs |
filter([=](const Attr& a) { return attributes & a.attr; }) |
transform([](const Attr& a) { return a.name; });
return accumulate(filteredAttrs, String{"+"}, std::plus<>{});
}
String to_string(Face face)
{
return format("{},{}{}", face.fg, face.bg, face.attributes);
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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->value.alias.empty())
return it->value.face;
it = m_aliases.find(it->value.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->value.alias.empty())
break;
if (it->value.alias == name)
throw runtime_error("face cycle detected");
it = m_aliases.find(it->value.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,
m_aliases | transform(std::mem_fn(&AliasMap::Item::key)));
}
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 }} },
{ "LineNumbersWrapped", {Face{ Color::Default, Color::Default, Attribute::Italic }} },
{ "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 }} },
{ "Whitespace", {Face{ Color::Default, Color::Default }} },
}
{}
}