Refactor whitespace highlighter into a struct
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@ -954,83 +954,87 @@ struct TabulationHighlighter : Highlighter
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}
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};
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void show_whitespaces(HighlightContext context, DisplayBuffer& display_buffer, BufferRange,
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StringView tab, StringView tabpad,
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StringView spc, StringView lf, StringView nbsp)
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struct ShowWhitespacesHighlighter : Highlighter
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{
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const int tabstop = context.context.options()["tabstop"].get<int>();
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auto whitespaceface = context.context.faces()["Whitespace"];
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auto& buffer = context.context.buffer();
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auto win_column = context.setup.window_pos.column;
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for (auto& line : display_buffer.lines())
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ShowWhitespacesHighlighter(String tab, String tabpad, String spc, String lf, String nbsp)
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: Highlighter{HighlightPass::Move}, m_tab{std::move(tab)}, m_tabpad{std::move(tabpad)},
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m_spc{std::move(spc)}, m_lf{std::move(lf)}, m_nbsp{std::move(nbsp)}
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{}
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static std::unique_ptr<Highlighter> create(HighlighterParameters params, Highlighter*)
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{
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for (auto atom_it = line.begin(); atom_it != line.end(); ++atom_it)
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static const ParameterDesc param_desc{
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{ { "tab", { true, "" } },
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{ "tabpad", { true, "" } },
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{ "spc", { true, "" } },
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{ "lf", { true, "" } },
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{ "nbsp", { true, "" } } },
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ParameterDesc::Flags::None, 0, 0
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};
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ParametersParser parser(params, param_desc);
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auto get_param = [&](StringView param, StringView fallback) {
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StringView value = parser.get_switch(param).value_or(fallback);
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if (value.char_length() != 1)
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throw runtime_error{format("-{} expects a single character parameter", param)};
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return value.str();
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};
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return std::make_unique<ShowWhitespacesHighlighter>(
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get_param("tab", "→"), get_param("tabpad", " "), get_param("spc", "·"),
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get_param("lf", "¬"), get_param("nbsp", "⍽"));
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}
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private:
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void do_highlight(HighlightContext context, DisplayBuffer& display_buffer, BufferRange)
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{
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const int tabstop = context.context.options()["tabstop"].get<int>();
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auto whitespaceface = context.context.faces()["Whitespace"];
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auto& buffer = context.context.buffer();
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auto win_column = context.setup.window_pos.column;
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for (auto& line : display_buffer.lines())
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{
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if (atom_it->type() != DisplayAtom::Range)
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continue;
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auto begin = get_iterator(buffer, atom_it->begin());
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auto end = get_iterator(buffer, atom_it->end());
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for (BufferIterator it = begin; it != end; )
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for (auto atom_it = line.begin(); atom_it != line.end(); ++atom_it)
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{
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auto coord = it.coord();
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Codepoint cp = utf8::read_codepoint(it, end);
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if (cp == '\t' or cp == ' ' or cp == '\n' or cp == 0xA0)
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{
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if (coord != begin.coord())
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atom_it = ++line.split(atom_it, coord);
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if (it != end)
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atom_it = line.split(atom_it, it.coord());
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if (atom_it->type() != DisplayAtom::Range)
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continue;
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if (cp == '\t')
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auto begin = get_iterator(buffer, atom_it->begin());
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auto end = get_iterator(buffer, atom_it->end());
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for (BufferIterator it = begin; it != end; )
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{
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auto coord = it.coord();
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Codepoint cp = utf8::read_codepoint(it, end);
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if (cp == '\t' or cp == ' ' or cp == '\n' or cp == 0xA0)
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{
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const ColumnCount column = get_column(buffer, tabstop, coord);
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const ColumnCount count = tabstop - (column % tabstop) -
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std::max(win_column - column, 0_col);
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atom_it->replace(tab + String(tabpad[(CharCount)0], count - tab.column_length()));
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if (coord != begin.coord())
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atom_it = ++line.split(atom_it, coord);
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if (it != end)
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atom_it = line.split(atom_it, it.coord());
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if (cp == '\t')
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{
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const ColumnCount column = get_column(buffer, tabstop, coord);
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const ColumnCount count = tabstop - (column % tabstop) -
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std::max(win_column - column, 0_col);
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atom_it->replace(m_tab + String(m_tabpad[(CharCount)0], count - m_tab.column_length()));
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}
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else if (cp == ' ')
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atom_it->replace(m_spc);
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else if (cp == '\n')
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atom_it->replace(m_lf);
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else if (cp == 0xA0)
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atom_it->replace(m_nbsp);
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atom_it->face = merge_faces(atom_it->face, whitespaceface);
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break;
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}
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else if (cp == ' ')
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atom_it->replace(spc.str());
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else if (cp == '\n')
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atom_it->replace(lf.str());
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else if (cp == 0xA0)
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atom_it->replace(nbsp.str());
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atom_it->face = merge_faces(atom_it->face, whitespaceface);
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break;
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}
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}
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}
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}
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}
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std::unique_ptr<Highlighter> show_whitespaces_factory(HighlighterParameters params, Highlighter*)
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{
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static const ParameterDesc param_desc{
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{ { "tab", { true, "" } },
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{ "tabpad", { true, "" } },
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{ "spc", { true, "" } },
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{ "lf", { true, "" } },
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{ "nbsp", { true, "" } } },
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ParameterDesc::Flags::None, 0, 0
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};
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ParametersParser parser(params, param_desc);
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auto get_param = [&](StringView param, StringView fallback) {
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StringView value = parser.get_switch(param).value_or(fallback);
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if (value.char_length() != 1)
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throw runtime_error{format("-{} expects a single character parameter", param)};
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return value.str();
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};
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using namespace std::placeholders;
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auto func = std::bind(show_whitespaces, _1, _2, _3,
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get_param("tab", "→"), get_param("tabpad", " "),
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get_param("spc", "·"),
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get_param("lf", "¬"),
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get_param("nbsp", "⍽"));
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return make_highlighter(std::move(func), HighlightPass::Move);
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}
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const String m_tab, m_tabpad, m_spc, m_lf, m_nbsp;
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};
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struct LineNumbersHighlighter : Highlighter
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{
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@ -2143,7 +2147,7 @@ void register_highlighters()
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"Apply the MatchingChar face to the char matching the one under the cursor" } });
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registry.insert({
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"show-whitespaces",
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{ show_whitespaces_factory,
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{ ShowWhitespacesHighlighter::create,
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"Display whitespaces using symbols \n"
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"Parameters: -tab <separator> -tabpad <separator> -lf <separator> -spc <separator> -nbsp <separator>\n" } });
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registry.insert({
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