Add a wrap highlighter
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93408e4b76
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@ -647,6 +647,80 @@ HighlighterAndId create_column_highlighter(HighlighterParameters params)
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return {"hlcol_" + params[0], make_simple_highlighter(std::move(func))};
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}
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HighlighterAndId create_wrap_highlighter(HighlighterParameters params)
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{
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if (params.size() != 1)
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throw runtime_error("wrong parameter count");
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String col_expr = params[0];
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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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ColumnCount column = -1;
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try
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{
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column = str_to_int_ifp(expand(col_expr, context)).value_or(0) - 1;
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}
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catch (runtime_error& err)
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{
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write_to_debug_buffer(
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format("Error evaluating highlight column expression: {}", err.what()));
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}
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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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const auto line_count = display_buffer.lines().size();
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for (auto it = display_buffer.lines().begin();
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it != display_buffer.lines().end(); ++it)
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{
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const LineCount buf_line = it->range().begin.line;
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int line_split_count = 1;
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const ByteCount line_length = buffer[buf_line].length();
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auto get_coord = [&](ColumnCount c) {
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auto col = get_byte_to_column(
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buffer, tabstop, {buf_line, c});
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return BufferCoord{buf_line, col};
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};
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auto coord = get_coord(column * line_split_count++);
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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 = it->begin();
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coord.column != line_length and atom_it != it->end(); )
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{
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if (!atom_it->has_buffer_range() or
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coord < atom_it->begin() or coord >= atom_it->end())
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{
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++atom_it;
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continue;
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}
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auto& line = *it;
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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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DisplayLine new_line{ AtomList{ atom_it, line.end() } };
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line.erase(atom_it, line.end());
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it = display_buffer.lines().insert(it+1, new_line);
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coord = get_coord(column * line_split_count++);
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atom_it = it->begin();
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}
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}
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}
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display_buffer.lines().resize(line_count);
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};
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return {"wrap_" + 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 ColumnCount tabstop = context.options()["tabstop"].get<int>();
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@ -1574,6 +1648,11 @@ void register_highlighters()
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{ create_column_highlighter,
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"Parameters: <value string> <face>\n"
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"Highlight the column given by evaluating <value string> with <face>" } });
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registry.insert({
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"wrap",
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{ create_wrap_highlighter,
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"Parameters: <value string>\n"
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"Wrap lines to given column" } });
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registry.insert({
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"ref",
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{ create_reference_highlighter,
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