kakoune/src/buffer_utils.hh

#ifndef buffer_utils_hh_INCLUDED
#define buffer_utils_hh_INCLUDED

#include "buffer.hh"
#include "selection.hh"

#include "utf8_iterator.hh"
#include "unicode.hh"

namespace Kakoune
{

inline String content(const Buffer& buffer, const Selection& range)
{
    return buffer.string(range.min(), buffer.char_next(range.max()));
}

inline ByteCoord erase(Buffer& buffer, const Selection& range)
{
    return buffer.erase(range.min(), buffer.char_next(range.max()));
}

inline ByteCoord replace(Buffer& buffer, const Selection& range, StringView content)
{
    return buffer.replace(range.min(), buffer.char_next(range.max()), content);
}

inline CharCount char_length(const Buffer& buffer, const Selection& range)
{
    return utf8::distance(buffer.iterator_at(range.min()),
                          buffer.iterator_at(buffer.char_next(range.max())));
}

inline CharCount char_length(const Buffer& buffer, const ByteCoord& begin, const ByteCoord& end)
{
    return utf8::distance(buffer.iterator_at(begin), buffer.iterator_at(end));
}

inline bool is_bol(ByteCoord coord)
{
    return coord.column == 0;
}

inline bool is_eol(const Buffer& buffer, ByteCoord coord)
{
    return buffer.is_end(coord) or buffer[coord.line].length() == coord.column+1;
}

inline bool is_bow(const Buffer& buffer, ByteCoord coord)
{
    auto it = utf8::iterator<BufferIterator>(buffer.iterator_at(coord), buffer);
    if (coord == ByteCoord{0,0})
        return is_word(*it);

    return not is_word(*(it-1)) and is_word(*it);
}

inline bool is_eow(const Buffer& buffer, ByteCoord coord)
{
    if (buffer.is_end(coord) or coord == ByteCoord{0,0})
        return true;

    auto it = utf8::iterator<BufferIterator>(buffer.iterator_at(coord), buffer);
    return is_word(*(it-1)) and not is_word(*it);
}

CharCount get_column(const Buffer& buffer,
                     CharCount tabstop, ByteCoord coord);

ByteCount get_byte_to_column(const Buffer& buffer, CharCount tabstop,
                             CharCoord coord);

Buffer* create_fifo_buffer(String name, int fd, bool scroll = false);
Buffer* open_file_buffer(StringView filename);
Buffer* open_or_create_file_buffer(StringView filename);
void reload_file_buffer(Buffer& buffer);

void write_to_debug_buffer(StringView str);

}

#endif // buffer_utils_hh_INCLUDED