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Add a column_option highlighter that highlight a column given in an option

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This commit is contained in:
Maxime Coste 2015-04-29 23:08:16 +01:00
parent 0ab4ac5515
commit 4e89cbfe83
1 changed files with 68 additions and 0 deletions
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68
src/highlighters.cc
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@ -514,6 +514,69 @@ HighlighterAndId create_line_option_highlighter(HighlighterParameters params)
return {"hlline_" + params[0], make_simple_highlighter(std::move(func))};
}
HighlighterAndId create_column_option_highlighter(HighlighterParameters params)
{
if (params.size() != 2)
throw runtime_error("wrong parameter count");
String facespec = params[1];
String option_name = params[0];
get_face(facespec); // validate facespec
GlobalScope::instance().options()[option_name].get<int>(); // verify option type now
auto func = [=](const Context& context, HighlightFlags flags,
DisplayBuffer& display_buffer, BufferRange)
{
const CharCount column = context.options()[option_name].get<int>() - 1;
if (column < 0)
return;
const Buffer& buffer = context.buffer();
const int tabstop = context.options()["tabstop"].get<int>();
auto face = get_face(facespec);
for (auto& line : display_buffer.lines())
{
const LineCount buf_line = line.range().begin.line;
const ByteCount byte_col = get_byte_to_column(buffer, tabstop, {buf_line, column});
const ByteCoord coord{buf_line, byte_col};
bool found = false;
if (buffer.is_valid(coord) and not buffer.is_end(coord))
{
for (auto atom_it = line.begin(); atom_it != line.end(); ++atom_it)
{
if (!atom_it->has_buffer_range())
continue;
kak_assert(atom_it->begin().line == buf_line);
if (coord >= atom_it->begin() and coord < atom_it->end())
{
if (coord > atom_it->begin())
atom_it = ++line.split(atom_it, coord);
if (buffer.next(coord) < atom_it->end())
atom_it = line.split(atom_it, buffer.next(coord));
apply_face(face)(*atom_it);
found = true;
break;
}
}
}
if (not found)
{
CharCount col = get_column(buffer, tabstop, buffer.prev(line.range().end));
if (col < column)
{
line.push_back({String{' ', column - col - 1}});
line.push_back({String{" "}, face});
}
}
}
};
return {"hlcol_" + params[0], make_simple_highlighter(std::move(func))};
}
void expand_tabulations(const Context& context, HighlightFlags flags, DisplayBuffer& display_buffer, BufferRange)
{
const int tabstop = context.options()["tabstop"].get<int>();
@ -1283,6 +1346,11 @@ void register_highlighters()
{ create_line_option_highlighter,
"Parameters: <option name> <face>\n"
"Highlight the line stored in <option name> with <face>" } });
registry.append({
"column_option",
{ create_column_option_highlighter,
"Parameters: <option name> <face>\n"
"Highlight the column stored in <option name> with <face>" } });
registry.append({
"ref",
{ create_reference_highlighter,