500 lines
15 KiB
C++
500 lines
15 KiB
C++
#include "selectors.hh"
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#include "string.hh"
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#include <algorithm>
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#include <boost/optional.hpp>
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namespace Kakoune
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{
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Selection select_line(const Buffer& buffer, const Selection& selection)
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{
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Utf8Iterator first = buffer.iterator_at(selection.cursor());
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if (*first == '\n' and first + 1 != buffer.end())
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++first;
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while (first != buffer.begin() and *(first - 1) != '\n')
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--first;
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Utf8Iterator last = first;
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while (last + 1 != buffer.end() and *last != '\n')
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++last;
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return utf8_range(first, last);
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}
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Selection select_matching(const Buffer& buffer, const Selection& selection)
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{
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std::vector<Codepoint> matching_pairs = { '(', ')', '{', '}', '[', ']', '<', '>' };
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Utf8Iterator it = buffer.iterator_at(selection.cursor());
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std::vector<Codepoint>::iterator match = matching_pairs.end();
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while (not is_eol(*it))
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{
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match = std::find(matching_pairs.begin(), matching_pairs.end(), *it);
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if (match != matching_pairs.end())
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break;
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++it;
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}
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if (match == matching_pairs.end())
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return selection;
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Utf8Iterator begin = it;
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if (((match - matching_pairs.begin()) % 2) == 0)
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{
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int level = 0;
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const Codepoint opening = *match;
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const Codepoint closing = *(match+1);
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while (it != buffer.end())
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{
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if (*it == opening)
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++level;
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else if (*it == closing and --level == 0)
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return utf8_range(begin, it);
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++it;
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}
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}
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else
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{
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int level = 0;
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const Codepoint opening = *(match-1);
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const Codepoint closing = *match;
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while (true)
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{
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if (*it == closing)
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++level;
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else if (*it == opening and --level == 0)
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return utf8_range(begin, it);
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if (it == buffer.begin())
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break;
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--it;
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}
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}
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return selection;
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}
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// c++14 will add std::optional, so we use boost::optional until then
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using boost::optional;
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static optional<Selection> find_surrounding(const Buffer& buffer,
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ByteCoord coord,
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CodepointPair matching,
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ObjectFlags flags, int init_level)
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{
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const bool to_begin = flags & ObjectFlags::ToBegin;
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const bool to_end = flags & ObjectFlags::ToEnd;
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const bool nestable = matching.first != matching.second;
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auto pos = buffer.iterator_at(coord);
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Utf8Iterator first = pos;
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if (to_begin)
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{
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int level = nestable ? init_level : 0;
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while (first != buffer.begin())
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{
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if (nestable and first != pos and *first == matching.second)
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++level;
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else if (*first == matching.first)
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{
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if (level == 0)
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break;
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else
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--level;
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}
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--first;
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}
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if (level != 0 or *first != matching.first)
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return optional<Selection>{};
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}
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Utf8Iterator last = pos;
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if (to_end)
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{
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int level = nestable ? init_level : 0;
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while (last != buffer.end())
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{
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if (nestable and last != pos and *last == matching.first)
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++level;
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else if (*last == matching.second)
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{
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if (level == 0)
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break;
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else
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--level;
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}
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++last;
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}
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if (level != 0 or last == buffer.end())
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return optional<Selection>{};
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}
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if (flags & ObjectFlags::Inner)
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{
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if (to_begin and first != last)
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++first;
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if (to_end and first != last)
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--last;
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}
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return to_end ? utf8_range(first, last) : utf8_range(last, first);
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}
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Selection select_surrounding(const Buffer& buffer, const Selection& selection,
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CodepointPair matching, int level,
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ObjectFlags flags)
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{
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const bool nestable = matching.first != matching.second;
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auto pos = selection.cursor();
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if (not nestable or flags & ObjectFlags::Inner)
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{
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if (auto res = find_surrounding(buffer, pos, matching, flags, level))
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return *res;
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return selection;
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}
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auto c = buffer.byte_at(pos);
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if ((flags == ObjectFlags::ToBegin and c == matching.first) or
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(flags == ObjectFlags::ToEnd and c == matching.second))
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++level;
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auto res = find_surrounding(buffer, pos, matching, flags, level);
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if (not res)
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return selection;
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if (flags == (ObjectFlags::ToBegin | ObjectFlags::ToEnd) and
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res->min() == selection.min() and res->max() == selection.max())
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{
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if (auto res_parent = find_surrounding(buffer, pos, matching, flags, level+1))
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return Selection{*res_parent};
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}
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return *res;
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}
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Selection select_to(const Buffer& buffer, const Selection& selection,
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Codepoint c, int count, bool inclusive)
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{
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Utf8Iterator begin = buffer.iterator_at(selection.cursor());
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Utf8Iterator end = begin;
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do
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{
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++end;
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skip_while(end, buffer.end(), [c](Codepoint cur) { return cur != c; });
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if (end == buffer.end())
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return selection;
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}
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while (--count > 0);
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return utf8_range(begin, inclusive ? end : end-1);
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}
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Selection select_to_reverse(const Buffer& buffer, const Selection& selection,
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Codepoint c, int count, bool inclusive)
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{
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Utf8Iterator begin = buffer.iterator_at(selection.cursor());
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Utf8Iterator end = begin;
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do
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{
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--end;
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skip_while_reverse(end, buffer.begin(), [c](Codepoint cur) { return cur != c; });
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if (end == buffer.begin())
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return selection;
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}
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while (--count > 0);
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return utf8_range(begin, inclusive ? end : end+1);
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}
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Selection select_to_eol(const Buffer& buffer, const Selection& selection)
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{
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Utf8Iterator begin = buffer.iterator_at(selection.cursor());
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Utf8Iterator end = begin;
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skip_while(end, buffer.end(), [](Codepoint cur) { return not is_eol(cur); });
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return utf8_range(begin, end != begin ? end-1 : end);
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}
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Selection select_to_eol_reverse(const Buffer& buffer, const Selection& selection)
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{
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Utf8Iterator begin = buffer.iterator_at(selection.cursor());
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Utf8Iterator end = begin - 1;
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skip_while_reverse(end, buffer.begin(), [](Codepoint cur) { return not is_eol(cur); });
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return utf8_range(begin, end == buffer.begin() ? end : end+1);
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}
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static bool is_end_of_sentence(char c)
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{
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return c == '.' or c == ';' or c == '!' or c == '?';
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}
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Selection select_sentence(const Buffer& buffer, const Selection& selection, ObjectFlags flags)
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{
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BufferIterator first = buffer.iterator_at(selection.cursor());
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if (not (flags & ObjectFlags::ToEnd))
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{
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BufferIterator prev_non_blank = first-1;
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skip_while_reverse(prev_non_blank, buffer.begin(),
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[](char c) { return is_blank(c) or is_eol(c); });
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if (is_end_of_sentence(*prev_non_blank))
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first = prev_non_blank;
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}
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BufferIterator last = first;
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if (flags & ObjectFlags::ToBegin)
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{
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bool saw_non_blank = false;
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while (first != buffer.begin())
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{
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char cur = *first;
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char prev = *(first-1);
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if (not is_blank(cur))
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saw_non_blank = true;
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if (is_eol(prev) and is_eol(cur))
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{
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++first;
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break;
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}
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else if (is_end_of_sentence(prev))
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{
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if (saw_non_blank)
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break;
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else if (flags & ObjectFlags::ToEnd)
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last = first-1;
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}
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--first;
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}
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skip_while(first, buffer.end(), is_blank);
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}
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if (flags & ObjectFlags::ToEnd)
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{
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while (last != buffer.end())
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{
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char cur = *last;
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if (is_end_of_sentence(cur) or
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(is_eol(cur) and (last+1 == buffer.end() or is_eol(*(last+1)))))
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break;
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++last;
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}
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if (not (flags & ObjectFlags::Inner) and last != buffer.end())
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{
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++last;
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skip_while(last, buffer.end(), is_blank);
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--last;
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}
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}
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return (flags & ObjectFlags::ToEnd) ? Selection{first.coord(), last.coord()}
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: Selection{last.coord(), first.coord()};
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}
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Selection select_paragraph(const Buffer& buffer, const Selection& selection, ObjectFlags flags)
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{
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BufferIterator first = buffer.iterator_at(selection.cursor());
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if (not (flags & ObjectFlags::ToEnd) and first.coord() > ByteCoord{0,1} and
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*(first-1) == '\n' and *(first-2) == '\n')
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--first;
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else if ((flags & ObjectFlags::ToEnd) and
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first != buffer.begin() and (first+1) != buffer.end() and
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*(first-1) == '\n' and *first == '\n')
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++first;
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BufferIterator last = first;
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if ((flags & ObjectFlags::ToBegin) and first != buffer.begin())
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{
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skip_while_reverse(first, buffer.begin(), is_eol);
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if (flags & ObjectFlags::ToEnd)
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last = first;
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while (first != buffer.begin())
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{
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char cur = *first;
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char prev = *(first-1);
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if (is_eol(prev) and is_eol(cur))
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{
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++first;
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break;
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}
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--first;
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}
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}
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if (flags & ObjectFlags::ToEnd)
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{
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if (last != buffer.end() && is_eol(*last))
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++last;
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while (last != buffer.end())
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{
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char cur = *last;
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char prev = *(last-1);
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if (is_eol(cur) and is_eol(prev))
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{
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if (not (flags & ObjectFlags::Inner))
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skip_while(last, buffer.end(), is_eol);
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break;
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}
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++last;
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}
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--last;
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}
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return (flags & ObjectFlags::ToEnd) ? Selection{first.coord(), last.coord()}
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: Selection{last.coord(), first.coord()};
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}
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static CharCount get_indent(const String& str, int tabstop)
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{
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CharCount indent = 0;
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for (auto& c : str)
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{
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if (c == ' ')
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++indent;
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else if (c =='\t')
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indent = (indent / tabstop + 1) * tabstop;
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else
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break;
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}
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return indent;
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}
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static bool is_only_whitespaces(const String& str)
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{
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auto it = str.begin();
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skip_while(it, str.end(),
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[](char c){ return c == ' ' or c == '\t' or c == '\n'; });
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return it == str.end();
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}
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Selection select_indent(const Buffer& buffer, const Selection& selection, ObjectFlags flags)
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{
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int tabstop = buffer.options()["tabstop"].get<int>();
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LineCount line = selection.cursor().line;
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auto indent = get_indent(buffer[line], tabstop);
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LineCount begin_line = line - 1;
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if (flags & ObjectFlags::ToBegin)
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{
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while (begin_line >= 0 and (buffer[begin_line] == "\n" or get_indent(buffer[begin_line], tabstop) >= indent))
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--begin_line;
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}
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++begin_line;
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LineCount end_line = line + 1;
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if (flags & ObjectFlags::ToEnd)
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{
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const LineCount end = buffer.line_count();
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while (end_line < end and (buffer[end_line] == "\n" or get_indent(buffer[end_line], tabstop) >= indent))
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++end_line;
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}
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--end_line;
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// remove only whitespaces lines in inner mode
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if (flags & ObjectFlags::Inner)
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{
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while (begin_line < end_line and
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is_only_whitespaces(buffer[begin_line]))
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++begin_line;
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while (begin_line < end_line and
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is_only_whitespaces(buffer[end_line]))
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--end_line;
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}
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return Selection{begin_line, {end_line, buffer[end_line].length() - 1}};
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}
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Selection select_lines(const Buffer& buffer, const Selection& selection)
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{
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// no need to be utf8 aware for is_eol as we only use \n as line seperator
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BufferIterator first = buffer.iterator_at(selection.anchor());
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BufferIterator last = buffer.iterator_at(selection.cursor());
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BufferIterator& to_line_start = first <= last ? first : last;
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BufferIterator& to_line_end = first <= last ? last : first;
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--to_line_start;
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skip_while_reverse(to_line_start, buffer.begin(), [](char cur) { return not is_eol(cur); });
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if (is_eol(*to_line_start))
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{
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if (++to_line_start == buffer.end())
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--to_line_start;
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}
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skip_while(to_line_end, buffer.end(), [](char cur) { return not is_eol(cur); });
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if (to_line_end == buffer.end())
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--to_line_end;
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return Selection(first.coord(), last.coord());
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}
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Selection trim_partial_lines(const Buffer& buffer, const Selection& selection)
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{
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// same as select_lines
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BufferIterator first = buffer.iterator_at(selection.anchor());
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BufferIterator last = buffer.iterator_at(selection.cursor());
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BufferIterator& to_line_start = first <= last ? first : last;
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BufferIterator& to_line_end = first <= last ? last : first;
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while (to_line_start != buffer.begin() and *(to_line_start-1) != '\n')
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++to_line_start;
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while (*(to_line_end+1) != '\n' and to_line_end != to_line_start)
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--to_line_end;
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return Selection(first.coord(), last.coord());
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}
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void select_buffer(SelectionList& selections)
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{
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auto& buffer = selections.buffer();
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selections = SelectionList{ buffer, Selection({0,0}, buffer.back_coord()) };
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}
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void select_all_matches(SelectionList& selections, const Regex& regex)
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{
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std::vector<Selection> result;
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auto& buffer = selections.buffer();
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for (auto& sel : selections)
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{
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auto sel_end = utf8::next(buffer.iterator_at(sel.max()));
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RegexIterator re_it(buffer.iterator_at(sel.min()), sel_end, regex);
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RegexIterator re_end;
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for (; re_it != re_end; ++re_it)
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{
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auto& begin = (*re_it)[0].first;
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auto& end = (*re_it)[0].second;
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if (begin == sel_end)
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continue;
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CaptureList captures;
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for (auto& match : *re_it)
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captures.emplace_back(match.first, match.second);
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result.push_back({ begin.coord(),
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(begin == end ? end : utf8::previous(end)).coord(),
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std::move(captures) });
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}
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}
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if (result.empty())
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throw runtime_error("nothing selected");
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selections = std::move(result);
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}
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void split_selections(SelectionList& selections, const Regex& regex)
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{
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std::vector<Selection> result;
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auto& buffer = selections.buffer();
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for (auto& sel : selections)
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{
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auto begin = buffer.iterator_at(sel.min());
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auto sel_end = utf8::next(buffer.iterator_at(sel.max()));
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RegexIterator re_it(begin, sel_end, regex,
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boost::regex_constants::match_nosubs);
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RegexIterator re_end;
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for (; re_it != re_end; ++re_it)
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{
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BufferIterator end = (*re_it)[0].first;
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result.push_back({ begin.coord(), (begin == end) ? end.coord() : utf8::previous(end).coord() });
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begin = (*re_it)[0].second;
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}
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if (begin.coord() <= sel.max())
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result.push_back({ begin.coord(), sel.max() });
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}
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selections = std::move(result);
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}
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}
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