470 lines
13 KiB
C++
470 lines
13 KiB
C++
#include "selectors.hh"
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#include "string.hh"
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#include <algorithm>
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namespace Kakoune
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{
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namespace
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{
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bool is_eol(char c)
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{
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return c == '\n';
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}
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bool is_blank(char c)
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{
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return c == ' ' or c == '\t';
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}
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template<bool punctuation_is_word = false>
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bool is_word(char c)
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{
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return Kakoune::is_word(c);
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}
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template<>
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bool is_word<true>(char c)
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{
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return !is_blank(c) and !is_eol(c);
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}
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static bool is_punctuation(char c)
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{
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return not (is_word(c) or is_blank(c) or is_eol(c));
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}
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enum class CharCategories
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{
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Blank,
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EndOfLine,
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Word,
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Punctuation,
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};
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template<bool punctuation_is_word = false>
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CharCategories categorize(char c)
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{
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if (is_word(c))
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return CharCategories::Word;
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if (is_eol(c))
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return CharCategories::EndOfLine;
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if (is_blank(c))
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return CharCategories::Blank;
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return punctuation_is_word ? CharCategories::Word
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: CharCategories::Punctuation;
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}
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template<typename T>
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bool skip_while(BufferIterator& it, T condition)
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{
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while (not it.is_end() and condition(*it))
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++it;
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return not it.is_end() and condition(*it);
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}
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template<typename T>
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bool skip_while_reverse(BufferIterator& it, T condition)
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{
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while (not it.is_begin() and condition(*it))
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--it;
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return not it.is_end() and condition(*it);
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}
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}
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typedef boost::regex_iterator<BufferIterator> RegexIterator;
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template<bool punctuation_is_word>
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SelectionAndCaptures select_to_next_word(const Selection& selection)
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{
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BufferIterator begin = selection.last();
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if (categorize<punctuation_is_word>(*begin) !=
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categorize<punctuation_is_word>(*(begin+1)))
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++begin;
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skip_while(begin, is_eol);
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BufferIterator end = begin+1;
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if (not punctuation_is_word and is_punctuation(*begin))
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skip_while(end, is_punctuation);
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else if (is_word<punctuation_is_word>(*begin))
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skip_while(end, is_word<punctuation_is_word>);
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bool with_end = skip_while(end, is_blank);
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return Selection(begin, with_end ? end : end-1);
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}
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template SelectionAndCaptures select_to_next_word<false>(const Selection&);
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template SelectionAndCaptures select_to_next_word<true>(const Selection&);
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template<bool punctuation_is_word>
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SelectionAndCaptures select_to_next_word_end(const Selection& selection)
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{
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BufferIterator begin = selection.last();
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if (categorize<punctuation_is_word>(*begin) !=
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categorize<punctuation_is_word>(*(begin+1)))
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++begin;
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skip_while(begin, is_eol);
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BufferIterator end = begin;
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skip_while(end, is_blank);
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bool with_end = false;
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if (not punctuation_is_word and is_punctuation(*end))
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with_end = skip_while(end, is_punctuation);
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else if (is_word<punctuation_is_word>(*end))
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with_end = skip_while(end, is_word<punctuation_is_word>);
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return Selection(begin, with_end ? end : end-1);
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}
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template SelectionAndCaptures select_to_next_word_end<false>(const Selection&);
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template SelectionAndCaptures select_to_next_word_end<true>(const Selection&);
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template<bool punctuation_is_word>
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SelectionAndCaptures select_to_previous_word(const Selection& selection)
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{
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BufferIterator begin = selection.last();
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if (categorize<punctuation_is_word>(*begin) !=
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categorize<punctuation_is_word>(*(begin-1)))
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--begin;
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skip_while_reverse(begin, is_eol);
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BufferIterator end = begin;
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skip_while_reverse(end, is_blank);
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bool with_end = false;
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if (not punctuation_is_word and is_punctuation(*end))
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with_end = skip_while_reverse(end, is_punctuation);
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else if (is_word<punctuation_is_word>(*end))
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with_end = skip_while_reverse(end, is_word<punctuation_is_word>);
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return Selection(begin, with_end ? end : end+1);
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}
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template SelectionAndCaptures select_to_previous_word<false>(const Selection&);
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template SelectionAndCaptures select_to_previous_word<true>(const Selection&);
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SelectionAndCaptures select_line(const Selection& selection)
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{
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BufferIterator first = selection.last();
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if (*first == '\n' and not (first + 1).is_end())
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++first;
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while (not first.is_begin() and *(first - 1) != '\n')
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--first;
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BufferIterator last = first;
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while (not (last + 1).is_end() and *last != '\n')
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++last;
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return Selection(first, last);
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}
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SelectionAndCaptures select_matching(const Selection& selection)
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{
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std::vector<char> matching_pairs = { '(', ')', '{', '}', '[', ']', '<', '>' };
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BufferIterator it = selection.last();
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std::vector<char>::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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BufferIterator 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 char opening = *match;
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const char closing = *(match+1);
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while (not it.is_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 Selection(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 char opening = *(match-1);
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const char closing = *match;
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while (not it.is_begin())
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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 Selection(begin, it);
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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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SelectionAndCaptures select_surrounding(const Selection& selection,
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const std::pair<char, char>& matching,
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bool inside)
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{
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int level = 0;
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BufferIterator first = selection.last();
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while (not first.is_begin())
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{
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if (first != selection.last() 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 selection;
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level = 0;
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BufferIterator last = first + 1;
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while (not last.is_end())
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{
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if (*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 != matching.second)
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return selection;
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if (inside)
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{
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++first;
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if (first != last)
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--last;
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}
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return Selection(first, last);
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}
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SelectionAndCaptures select_to(const Selection& selection,
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char c, int count, bool inclusive)
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{
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BufferIterator begin = selection.last();
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BufferIterator end = begin;
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do
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{
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++end;
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skip_while(end, [c](char cur) { return not is_eol(cur) and cur != c; });
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if (end.is_end() or is_eol(*end))
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return selection;
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}
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while (--count > 0);
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return Selection(begin, inclusive ? end : end-1);
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}
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SelectionAndCaptures select_to_reverse(const Selection& selection,
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char c, int count, bool inclusive)
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{
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BufferIterator begin = selection.last();
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BufferIterator end = begin;
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do
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{
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--end;
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skip_while_reverse(end, [c](char cur) { return not is_eol(cur) and cur != c; });
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if (end.is_begin() or is_eol(*end))
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return selection;
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}
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while (--count > 0);
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return Selection(begin, inclusive ? end : end+1);
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}
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SelectionAndCaptures select_to_eol(const Selection& selection)
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{
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BufferIterator begin = selection.last();
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BufferIterator end = begin + 1;
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skip_while(end, [](char cur) { return not is_eol(cur); });
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return Selection(begin, end-1);
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}
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SelectionAndCaptures select_to_eol_reverse(const Selection& selection)
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{
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BufferIterator begin = selection.last();
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BufferIterator end = begin - 1;
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skip_while_reverse(end, [](char cur) { return not is_eol(cur); });
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return Selection(begin, end.is_begin() ? end : end+1);
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}
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template<bool punctuation_is_word>
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SelectionAndCaptures select_whole_word(const Selection& selection, bool inner)
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{
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BufferIterator first = selection.last();
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BufferIterator last = first;
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if (is_word(*first))
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{
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if (not skip_while_reverse(first, is_word<punctuation_is_word>))
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++first;
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skip_while(last, is_word<punctuation_is_word>);
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if (not inner)
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skip_while(last, is_blank);
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}
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else if (not inner)
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{
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if (not skip_while_reverse(first, is_blank))
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++first;
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skip_while(last, is_blank);
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if (not is_word<punctuation_is_word>(*last))
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return selection;
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skip_while(last, is_word<punctuation_is_word>);
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}
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--last;
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return Selection(first, last);
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}
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template SelectionAndCaptures select_whole_word<false>(const Selection&, bool);
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template SelectionAndCaptures select_whole_word<true>(const Selection&, bool);
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SelectionAndCaptures select_whole_lines(const Selection& selection)
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{
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BufferIterator first = selection.first();
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BufferIterator last = selection.last();
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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, [](char cur) { return not is_eol(cur); });
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++to_line_start;
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skip_while(to_line_end, [](char cur) { return not is_eol(cur); });
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return Selection(first, last);
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}
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SelectionAndCaptures select_whole_buffer(const Selection& selection)
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{
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const Buffer& buffer = selection.first().buffer();
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return Selection(buffer.begin(), buffer.end()-1);
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}
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SelectionAndCaptures select_next_match(const Selection& selection,
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const String& regex)
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{
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try
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{
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BufferIterator begin = selection.last();
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BufferIterator end = begin;
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CaptureList captures;
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Regex ex(regex.begin(), regex.end());
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boost::match_results<BufferIterator> matches;
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if (boost::regex_search(begin+1, begin.buffer().end(),
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matches, ex))
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{
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begin = matches[0].first;
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end = matches[0].second;
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for (auto& match : matches)
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captures.push_back(String(match.first, match.second));
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}
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else if (boost::regex_search(begin.buffer().begin(), begin+1,
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matches, ex))
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{
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begin = matches[0].first;
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end = matches[0].second;
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for (auto& match : matches)
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captures.push_back(String(match.first, match.second));
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}
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else
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throw runtime_error("'" + regex + "': no matches found");
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if (begin == end)
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++end;
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return SelectionAndCaptures(begin, end - 1, std::move(captures));
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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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SelectionAndCapturesList select_all_matches(const Selection& selection,
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const String& regex)
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{
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try
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{
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Regex ex(regex.begin(), regex.end());
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RegexIterator re_it(selection.begin(), selection.end(), ex);
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RegexIterator re_end;
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SelectionAndCapturesList result;
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for (; re_it != re_end; ++re_it)
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{
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BufferIterator begin = (*re_it)[0].first;
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BufferIterator end = (*re_it)[0].second;
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if (begin == selection.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.push_back(String(match.first, match.second));
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result.push_back(SelectionAndCaptures(begin,
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begin == end ? end : end-1,
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std::move(captures)));
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}
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return result;
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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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SelectionAndCapturesList split_selection(const Selection& selection,
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const String& separator_regex)
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{
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try
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{
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Regex ex(separator_regex.begin(), separator_regex.end());
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RegexIterator re_it(selection.begin(), selection.end(), ex,
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boost::regex_constants::match_nosubs);
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RegexIterator re_end;
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SelectionAndCapturesList result;
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BufferIterator begin = selection.begin();
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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(Selection(begin, (begin == end) ? end : end-1));
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begin = (*re_it)[0].second;
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}
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result.push_back(Selection(begin, selection.last()));
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return result;
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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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}
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