146 lines
4.6 KiB
C++
146 lines
4.6 KiB
C++
#include "filters.hh"
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#include "buffer.hh"
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#include "selection.hh"
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namespace Kakoune
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{
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void preserve_indent(Buffer& buffer, Selection& selection, String& content)
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{
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if (content == "\n")
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{
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BufferIterator line_begin = buffer.iterator_at_line_begin(selection.last() - 1);
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BufferIterator first_non_white = line_begin;
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while ((*first_non_white == '\t' or *first_non_white == ' ') and
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not first_non_white.is_end())
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++first_non_white;
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content += buffer.string(line_begin, first_non_white);
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}
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}
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void cleanup_whitespaces(Buffer& buffer, Selection& selection, String& content)
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{
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const BufferIterator& position = selection.last();
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if (content[0] == '\n' and not position.is_begin())
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{
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BufferIterator whitespace_start = position-1;
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while ((*whitespace_start == ' ' or *whitespace_start == '\t') and
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not whitespace_start .is_begin())
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--whitespace_start;
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++whitespace_start;
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if (whitespace_start!= position)
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buffer.erase(whitespace_start, position);
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}
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}
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void expand_tabulations(Buffer& buffer, Selection& selection, String& content)
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{
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const int tabstop = buffer.options()["tabstop"].get<int>();
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if (content == "\t")
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{
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int column = 0;
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const BufferIterator& position = selection.last();
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for (auto line_it = buffer.iterator_at_line_begin(position);
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line_it != position; ++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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content = String();
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for (int i = 0; i < count; ++i)
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content += ' ';
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}
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}
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struct RegexFilter
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{
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RegexFilter(const String& line_match, const String& insert_match,
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const String& replacement)
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: m_line_match(line_match.c_str()), m_insert_match(insert_match.c_str()),
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m_replacement(replacement.c_str()) {}
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void operator() (Buffer& buffer, Selection& selection, String& content)
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{
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const auto& position = selection.last();
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auto line_begin = buffer.iterator_at_line_begin(position);
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boost::match_results<BufferIterator> results;
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if (boost::regex_match(content.c_str(), m_insert_match) and
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boost::regex_match(line_begin, position, results, m_line_match))
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{
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content = results.format(m_replacement.c_str());
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auto it = std::find(content.begin(), content.end(), '$');
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if (it != content.end())
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{
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++it;
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if (it != content.end() && *it == 'c')
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{
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String suffix(it+1, content.end());
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content = String(content.begin(), it-1);
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auto first = selection.first();
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auto last = selection.last();
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buffer.insert(position, suffix);
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if (selection.first() == selection.last())
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selection.first() -= suffix.length();
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selection.last() -= suffix.length();
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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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Regex m_line_match;
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Regex m_insert_match;
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String m_replacement;
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};
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FilterAndId regex_filter_factory(const FilterParameters& params)
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{
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if (params.size() != 3)
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throw runtime_error("wrong parameter count");
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return FilterAndId{"re" + params[0] + "__" + params[1],
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RegexFilter{params[0], params[1], params[2]}};
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}
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template<void (*filter_func)(Buffer&, Selection&, String&)>
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class SimpleFilterFactory
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{
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public:
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SimpleFilterFactory(const String& id) : m_id(id) {}
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FilterAndId operator()(const FilterParameters& params) const
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{
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return FilterAndId(m_id, FilterFunc(filter_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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FilterAndId filter_group_factory(const FilterParameters& 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 FilterAndId(params[0], FilterGroup());
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}
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void register_filters()
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{
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FilterRegistry& registry = FilterRegistry::instance();
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registry.register_func("preserve_indent", SimpleFilterFactory<preserve_indent>("preserve_indent"));
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registry.register_func("cleanup_whitespaces", SimpleFilterFactory<cleanup_whitespaces>("cleanup_whitespaces"));
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registry.register_func("expand_tabulations", SimpleFilterFactory<expand_tabulations>("expand_tabulations"));
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registry.register_func("regex", regex_filter_factory);
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registry.register_func("group", filter_group_factory);
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}
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}
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