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Support name captures in dynregex highlighters

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Fixes #2856
This commit is contained in:
Maxime Coste 2019-04-16 00:18:15 +10:00
parent 6b79c1e000
commit 6d83828dab
1 changed files with 21 additions and 5 deletions
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26
src/highlighters.cc
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@ -452,7 +452,7 @@ public:
void do_highlight(HighlightContext context, DisplayBuffer& display_buffer, BufferRange range) override
{
Regex regex = m_regex_getter(context.context);
FacesSpec face = m_face_getter(context.context);
FacesSpec face = regex.empty() ? FacesSpec{} : m_face_getter(context.context, regex);
if (regex != m_last_regex or face != m_last_face)
{
m_last_regex = std::move(regex);
@ -479,15 +479,14 @@ std::unique_ptr<Highlighter> create_dynamic_regex_highlighter(HighlighterParamet
if (params.size() < 2)
throw runtime_error("wrong parameter count");
FacesSpec faces;
Vector<std::pair<String, String>> faces;
for (auto& spec : params.subrange(1))
{
auto colon = find(spec, ':');
if (colon == spec.end())
throw runtime_error("wrong face spec: '" + spec +
"' expected <capture>:<facespec>");
int capture = str_to_int({spec.begin(), colon});
faces.emplace_back(capture, String{colon+1, spec.end()});
faces.emplace_back(String{spec.begin(), colon}, String{colon+1, spec.end()});
}
auto make_hl = [](auto& regex_getter, auto& face_getter) {
@ -495,7 +494,24 @@ std::unique_ptr<Highlighter> create_dynamic_regex_highlighter(HighlighterParamet
std::decay_t<decltype(face_getter)>>>(
std::move(regex_getter), std::move(face_getter));
};
auto get_face = [faces](const Context& context){ return faces; };
auto get_face = [faces=std::move(faces)](const Context& context, const Regex& regex){
FacesSpec spec;
for (auto& face : faces)
{
const int capture = str_to_int_ifp(face.first).value_or_compute([&] {
return regex.named_capture_index(face.first);
});
if (capture < 0)
{
write_to_debug_buffer(format("Error while evaluating dynamic regex expression faces,"
" {} is neither a capture index nor a capture name",
face.first));
return FacesSpec{};
}
spec.emplace_back(capture, face.second);
}
return spec;
};
CommandParser parser{params[0]};
auto token = parser.read_token(true);