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Add basic region highlighter

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This commit is contained in:
Maxime Coste 2013-12-04 00:48:46 +00:00
parent e348c35b25
commit 8b2f340238
1 changed files with 60 additions and 0 deletions
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60
src/highlighters.cc
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@ -418,6 +418,65 @@ HighlighterAndId reference_factory(HighlighterParameters params)
{ DefinedHighlighters::instance().get_group(name, '/')(window, display_buffer); });
}
struct RegionHighlighter
{
public:
RegionHighlighter(String begin, String end, String ignore_prefix,
ColorPair colors)
: m_begin(std::move(begin)),
m_end(std::move(end)),
m_ignore_prefix(std::move(ignore_prefix)),
m_colors(colors)
{}
void operator()(const Window& window, DisplayBuffer& display_buffer)
{
auto& buffer = window.buffer();
auto end = buffer.end();
auto reg_beg = std::search(buffer.begin(), end,
m_begin.begin(), m_begin.end());
while (reg_beg != end)
{
auto reg_end = reg_beg + m_begin.length();
do
{
reg_end = std::search(reg_end, end, m_end.begin(), m_end.end());
if (reg_end != end)
reg_end += m_end.length();
}
while (reg_end != end and not m_ignore_prefix.empty() and
std::equal(m_ignore_prefix.begin(), m_ignore_prefix.end(),
reg_end - m_end.length() - m_ignore_prefix.length()));
highlight_range(display_buffer, reg_beg.coord(), reg_end.coord(), true,
[this](DisplayAtom& atom) { atom.colors = m_colors; });
if (reg_end == end)
break;
reg_beg = std::search(reg_end, end, m_begin.begin(), m_begin.end());
}
}
private:
String m_begin;
String m_end;
String m_ignore_prefix;
ColorPair m_colors;
};
HighlighterAndId region_factory(HighlighterParameters params)
{
if (params.size() != 3 and params.size() != 4)
throw runtime_error("wrong parameter count");
const String& begin = params[0];
const String& end = params[1];
const String& ignore_prefix = params.size() == 4 ? params[2] : "";
const ColorPair colors = get_color(params.back());
return HighlighterAndId("region("+begin+","+end+","+ignore_prefix+")",
RegionHighlighter{begin, end, ignore_prefix, colors});
}
void register_highlighters()
{
HighlighterRegistry& registry = HighlighterRegistry::instance();
@ -429,6 +488,7 @@ void register_highlighters()
registry.register_func("group", highlighter_group_factory);
registry.register_func("flag_lines", flag_lines_factory);
registry.register_func("ref", reference_factory);
registry.register_func("region", region_factory);
}
}