334 lines
11 KiB
C++
334 lines
11 KiB
C++
#include "highlighters.hh"
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#include "assert.hh"
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#include "window.hh"
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#include "color_registry.hh"
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#include "highlighter_group.hh"
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#include "register_manager.hh"
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#include "context.hh"
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#include "string.hh"
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#include "utf8.hh"
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namespace Kakoune
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{
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using namespace std::placeholders;
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typedef boost::regex_iterator<BufferIterator> RegexIterator;
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template<typename T>
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void highlight_range(DisplayBuffer& display_buffer,
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BufferIterator begin, BufferIterator end,
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bool skip_replaced, T func)
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{
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if (begin == end or end <= display_buffer.range().first
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or begin >= display_buffer.range().second)
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return;
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for (auto& line : display_buffer.lines())
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{
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if (line.buffer_line() < begin.line() or end.line() < line.buffer_line())
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continue;
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for (auto atom_it = line.begin(); atom_it != line.end(); ++atom_it)
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{
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bool is_replaced = atom_it->content.type() == AtomContent::ReplacedBufferRange;
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if (not atom_it->content.has_buffer_range() or
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(skip_replaced and is_replaced))
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continue;
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if (end <= atom_it->content.begin() or begin >= atom_it->content.end())
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continue;
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if (not is_replaced and begin > atom_it->content.begin())
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atom_it = ++line.split(atom_it, begin);
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if (not is_replaced and end < atom_it->content.end())
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{
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atom_it = line.split(atom_it, end);
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func(*atom_it);
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++atom_it;
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}
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else
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func(*atom_it);
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}
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}
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}
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typedef std::unordered_map<size_t, const ColorPair*> ColorSpec;
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class RegexColorizer
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{
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public:
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RegexColorizer(Regex regex, ColorSpec colors)
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: m_regex(std::move(regex)), m_colors(std::move(colors)),
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m_cache_timestamp(0)
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{
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}
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void operator()(DisplayBuffer& display_buffer)
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{
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update_cache_ifn(display_buffer.range());
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for (auto& match : m_cache_matches)
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{
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for (size_t n = 0; n < match.size(); ++n)
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{
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auto col_it = m_colors.find(n);
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if (col_it == m_colors.end())
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continue;
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highlight_range(display_buffer, match[n].first, match[n].second, true,
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[&](DisplayAtom& atom) {
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atom.fg_color = col_it->second->first;
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atom.bg_color = col_it->second->second;
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});
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}
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}
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}
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private:
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BufferRange m_cache_range;
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size_t m_cache_timestamp;
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std::vector<boost::match_results<BufferIterator>> m_cache_matches;
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Regex m_regex;
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ColorSpec m_colors;
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void update_cache_ifn(const BufferRange& range)
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{
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const Buffer& buf = range.first.buffer();
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if (m_cache_range.first.is_valid() and
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&m_cache_range.first.buffer() == &buf and
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buf.timestamp() == m_cache_timestamp and
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range.first >= m_cache_range.first and
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range.second <= m_cache_range.second)
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return;
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m_cache_matches.clear();
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m_cache_range.first = buf.iterator_at_line_begin(range.first.line() - 10);
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m_cache_range.second = buf.iterator_at_line_end(range.second.line() + 10);
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m_cache_timestamp = buf.timestamp();
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RegexIterator re_it(m_cache_range.first, m_cache_range.second, m_regex);
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RegexIterator re_end;
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for (; re_it != re_end; ++re_it)
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m_cache_matches.push_back(*re_it);
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}
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};
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HighlighterAndId colorize_regex_factory(Window& window,
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const 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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try
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{
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static Regex color_spec_ex(R"((\d+):(\w+(,\w+)?))");
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ColorSpec colors;
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for (auto it = params.begin() + 1; it != params.end(); ++it)
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{
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boost::match_results<String::iterator> res;
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if (not boost::regex_match(it->begin(), it->end(), res, color_spec_ex))
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throw runtime_error("wrong colorspec: '" + *it +
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"' expected <capture>:<fgcolor>[,<bgcolor>]");
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int capture = str_to_int(String(res[1].first, res[1].second));
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const ColorPair*& color = colors[capture];
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color = &ColorRegistry::instance()[String(res[2].first, res[2].second)];
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}
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String id = "colre'" + params[0] + "'";
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Regex ex(params[0].begin(), params[0].end(),
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boost::regex::perl | boost::regex::optimize);
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return HighlighterAndId(id, RegexColorizer(std::move(ex),
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std::move(colors)));
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}
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catch (boost::regex_error& err)
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{
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throw runtime_error(String("regex error: ") + err.what());
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}
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}
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class SearchHighlighter
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{
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public:
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SearchHighlighter(const ColorSpec& colors)
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: m_colors(colors), m_colorizer(Regex(), m_colors) {}
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void operator()(DisplayBuffer& display_buffer)
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{
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memoryview<String> searches = RegisterManager::instance()['/'].values(Context{});
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if (searches.empty())
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return;
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const String& search = searches[0];
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if (search != m_last_search)
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{
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m_last_search = search;
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if (not m_last_search.empty())
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m_colorizer = RegexColorizer{Regex{m_last_search.begin(), m_last_search.end()}, m_colors};
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}
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if (not m_last_search.empty())
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m_colorizer(display_buffer);
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}
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private:
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String m_last_search;
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ColorSpec m_colors;
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RegexColorizer m_colorizer;
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};
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HighlighterAndId highlight_search_factory(Window& window,
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const 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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try
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{
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ColorSpec colors;
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colors[0] = &ColorRegistry::instance()[params[0]];
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return {"hlsearch", SearchHighlighter{colors}};
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}
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catch (boost::regex_error& err)
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{
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throw runtime_error(String("regex error: ") + err.what());
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}
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};
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void expand_tabulations(Window& window, DisplayBuffer& display_buffer)
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{
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const int tabstop = window.options()["tabstop"].as_int();
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for (auto& line : display_buffer.lines())
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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->content.type() != AtomContent::BufferRange)
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continue;
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auto begin = atom_it->content.begin();
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auto end = atom_it->content.end();
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for (BufferIterator it = begin; it != end; ++it)
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{
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if (*it == '\t')
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{
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if (it != begin)
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atom_it = ++line.split(atom_it, it);
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if (it+1 != end)
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atom_it = line.split(atom_it, it+1);
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int column = 0;
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for (auto line_it = it.buffer().iterator_at_line_begin(it);
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line_it != it; ++line_it)
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{
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assert(*line_it != '\n');
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if (*line_it == '\t')
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column += tabstop - (column % tabstop);
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else
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++column;
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}
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int count = tabstop - (column % tabstop);
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String padding;
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for (int i = 0; i < count; ++i)
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padding += ' ';
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atom_it->content.replace(padding);
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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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void show_line_numbers(Window& window, DisplayBuffer& display_buffer)
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{
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LineCount last_line = window.buffer().line_count();
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int digit_count = 0;
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for (LineCount c = last_line; c > 0; c /= 10)
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++digit_count;
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char format[] = "%?d ";
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format[1] = '0' + digit_count;
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for (auto& line : display_buffer.lines())
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{
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char buffer[10];
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snprintf(buffer, 10, format, (int)line.buffer_line() + 1);
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DisplayAtom atom = DisplayAtom(AtomContent(buffer));
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atom.fg_color = Color::Black;
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atom.bg_color = Color::White;
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line.insert(line.begin(), std::move(atom));
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}
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}
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void highlight_selections(Window& window, DisplayBuffer& display_buffer)
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{
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for (auto& sel : window.selections())
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{
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highlight_range(display_buffer, sel.begin(), sel.end(), false,
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[](DisplayAtom& atom) { atom.attribute |= Attributes::Underline; });
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const BufferIterator& last = sel.last();
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highlight_range(display_buffer, last, utf8::next(last), false,
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[](DisplayAtom& atom) { atom.attribute |= Attributes::Reverse; atom.attribute &= ~Attributes::Underline; });
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}
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const Selection& back = window.selections().back();
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const BufferIterator& last = back.last();
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highlight_range(display_buffer, back.begin(), back.end(), false,
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[](DisplayAtom& atom) { atom.attribute |= Attributes::Bold; });
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}
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template<void (*highlighter_func)(DisplayBuffer&)>
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class SimpleHighlighterFactory
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{
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public:
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SimpleHighlighterFactory(const String& id) : m_id(id) {}
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HighlighterAndId operator()(Window& window,
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const HighlighterParameters& params) const
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{
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return HighlighterAndId(m_id, HighlighterFunc(highlighter_func));
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}
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private:
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String m_id;
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};
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template<void (*highlighter_func)(Window&, DisplayBuffer&)>
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class WindowHighlighterFactory
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{
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public:
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WindowHighlighterFactory(const String& id) : m_id(id) {}
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HighlighterAndId operator()(Window& window,
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const HighlighterParameters& params) const
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{
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return HighlighterAndId(m_id, std::bind(highlighter_func, std::ref(window), _1));
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}
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private:
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String m_id;
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};
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HighlighterAndId highlighter_group_factory(Window& window,
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const 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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return HighlighterAndId(params[0], HighlighterGroup());
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}
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void register_highlighters()
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{
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HighlighterRegistry& registry = HighlighterRegistry::instance();
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registry.register_func("highlight_selections", WindowHighlighterFactory<highlight_selections>("highlight_selections"));
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registry.register_func("expand_tabs", WindowHighlighterFactory<expand_tabulations>("expand_tabs"));
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registry.register_func("number_lines", WindowHighlighterFactory<show_line_numbers>("number_lines"));
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registry.register_func("regex", colorize_regex_factory);
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registry.register_func("search", highlight_search_factory);
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registry.register_func("group", highlighter_group_factory);
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}
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}
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