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Add FlagLines highlighter

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This highlighter show a given flag in front of each lines whose number
is present in a given int-list option
This commit is contained in:
Maxime Coste 2013-03-06 14:24:47 +01:00
parent fb7234544e
commit 4712765e8a
1 changed files with 40 additions and 0 deletions
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40
src/highlighters.cc
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@ -310,6 +310,45 @@ void expand_unprintable(DisplayBuffer& display_buffer)
}
}
class FlagLines
{
public:
FlagLines(String flag, String lines_opt_name, const OptionManager& options)
: m_flag(std::move(flag)), m_lines_opt_name(std::move(lines_opt_name)),
m_options(options)
{
// trigger an exception if option is not of right type.
m_options[m_lines_opt_name].get<std::vector<int>>();
}
void operator()(DisplayBuffer& display_buffer)
{
auto& lines = m_options[m_lines_opt_name].get<std::vector<int>>();
const String empty{' ', m_flag.char_length()};
for (auto& line : display_buffer.lines())
{
const bool flagged = contains(lines, (int)line.buffer_line() + 1);
DisplayAtom atom{AtomContent(flagged ? m_flag : empty)};
atom.fg_color = Color::Blue;
atom.bg_color = Color::Cyan;
line.insert(line.begin(), std::move(atom));
}
}
private:
String m_flag;
String m_lines_opt_name;
const OptionManager& m_options;
};
HighlighterAndId flag_lines_factory(const HighlighterParameters& params, const Window& window)
{
if (params.size() != 2)
throw runtime_error("wrong parameter count");
return {"hlflags_" + params[1], FlagLines{params[0], params[1], window.options()}};
}
template<void (*highlighter_func)(DisplayBuffer&)>
class SimpleHighlighterFactory
{
@ -340,6 +379,7 @@ void register_highlighters()
registry.register_func("regex", colorize_regex_factory);
registry.register_func("search", highlight_search_factory);
registry.register_func("group", highlighter_group_factory);
registry.register_func("flag_lines", flag_lines_factory);
}
}