2011-12-02 15:28:27 +01:00
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#include "filters.hh"
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#include "filter_registry.hh"
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#include "buffer.hh"
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namespace Kakoune
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{
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2011-12-06 19:58:43 +01:00
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void preserve_indent(Buffer& buffer, Modification& modification)
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2011-12-02 15:28:27 +01:00
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{
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2011-12-06 19:58:43 +01:00
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if (modification.type == Modification::Insert and
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2011-12-02 15:28:27 +01:00
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modification.content == "\n")
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{
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BufferIterator line_begin = buffer.iterator_at_line_begin(modification.position - 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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modification.content += buffer.string(line_begin, first_non_white);
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}
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}
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2011-12-06 19:58:43 +01:00
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void expand_tabulations(Buffer& buffer, Modification& modification)
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2011-12-03 21:25:05 +01:00
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{
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const int tabstop = 8;
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2011-12-06 19:58:43 +01:00
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if (modification.type == Modification::Insert and
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2011-12-03 21:25:05 +01:00
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modification.content == "\t")
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{
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int column = 0;
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BufferCoord pos = buffer.line_and_column_at(modification.position);
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for (auto line_it = buffer.iterator_at({pos.line, 0});
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line_it != modification.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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modification.content = std::string(count, ' ');
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}
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}
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2011-12-06 19:58:43 +01:00
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template<void (*filter_func)(Buffer&, Modification&)>
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2011-12-02 15:28:27 +01:00
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class SimpleFilterFactory
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{
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public:
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SimpleFilterFactory(const std::string& id) : m_id(id) {}
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2011-12-07 15:29:10 +01:00
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FilterAndId operator()(Window& window,
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2011-12-02 15:28:27 +01:00
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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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std::string m_id;
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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_factory("preserve_indent", SimpleFilterFactory<preserve_indent>("preserve_indent"));
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2011-12-03 21:25:05 +01:00
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registry.register_factory("expand_tabulations", SimpleFilterFactory<expand_tabulations>("expand_tabulations"));
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2011-12-02 15:28:27 +01:00
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}
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}
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