Add a column_option highlighter that highlight a column given in an option
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@ -514,6 +514,69 @@ HighlighterAndId create_line_option_highlighter(HighlighterParameters params)
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return {"hlline_" + params[0], make_simple_highlighter(std::move(func))};
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}
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HighlighterAndId create_column_option_highlighter(HighlighterParameters params)
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{
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if (params.size() != 2)
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throw runtime_error("wrong parameter count");
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String facespec = params[1];
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String option_name = params[0];
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get_face(facespec); // validate facespec
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GlobalScope::instance().options()[option_name].get<int>(); // verify option type now
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auto func = [=](const Context& context, HighlightFlags flags,
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DisplayBuffer& display_buffer, BufferRange)
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{
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const CharCount column = context.options()[option_name].get<int>() - 1;
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if (column < 0)
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return;
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const Buffer& buffer = context.buffer();
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const int tabstop = context.options()["tabstop"].get<int>();
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auto face = get_face(facespec);
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for (auto& line : display_buffer.lines())
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{
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const LineCount buf_line = line.range().begin.line;
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const ByteCount byte_col = get_byte_to_column(buffer, tabstop, {buf_line, column});
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const ByteCoord coord{buf_line, byte_col};
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bool found = false;
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if (buffer.is_valid(coord) and not buffer.is_end(coord))
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{
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for (auto atom_it = line.begin(); atom_it != line.end(); ++atom_it)
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{
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if (!atom_it->has_buffer_range())
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continue;
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kak_assert(atom_it->begin().line == buf_line);
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if (coord >= atom_it->begin() and coord < atom_it->end())
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{
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if (coord > atom_it->begin())
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atom_it = ++line.split(atom_it, coord);
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if (buffer.next(coord) < atom_it->end())
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atom_it = line.split(atom_it, buffer.next(coord));
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apply_face(face)(*atom_it);
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found = true;
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break;
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}
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}
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}
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if (not found)
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{
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CharCount col = get_column(buffer, tabstop, buffer.prev(line.range().end));
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if (col < column)
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{
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line.push_back({String{' ', column - col - 1}});
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line.push_back({String{" "}, face});
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}
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}
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}
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};
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return {"hlcol_" + params[0], make_simple_highlighter(std::move(func))};
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}
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void expand_tabulations(const Context& context, HighlightFlags flags, DisplayBuffer& display_buffer, BufferRange)
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{
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const int tabstop = context.options()["tabstop"].get<int>();
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@ -1283,6 +1346,11 @@ void register_highlighters()
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{ create_line_option_highlighter,
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"Parameters: <option name> <face>\n"
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"Highlight the line stored in <option name> with <face>" } });
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registry.append({
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"column_option",
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{ create_column_option_highlighter,
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"Parameters: <option name> <face>\n"
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"Highlight the column stored in <option name> with <face>" } });
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registry.append({
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"ref",
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{ create_reference_highlighter,
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