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Make use of custom regex backward searching support for reverse search

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This commit is contained in:
Maxime Coste 2017-10-09 14:56:47 +08:00
parent 785cd34b4b
commit 1c95074657
5 changed files with 57 additions and 57 deletions
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34
src/normal.cc
View File

@ -687,7 +687,7 @@ void paste_all(Context& context, NormalParams params)
selections = std::move(result);
}
template<typename T>
template<MatchDirection direction = MatchDirection::Forward, typename T>
void regex_prompt(Context& context, String prompt, String default_regex, T func)
{
DisplayCoord position = context.has_window() ? context.window().position() : DisplayCoord{};
@ -719,7 +719,7 @@ void regex_prompt(Context& context, String prompt, String default_regex, T func)
context.push_jump();
if (not str.empty() or event == PromptEvent::Validate)
func(str.empty() ? Regex{default_regex} : Regex{str}, event, context);
func(Regex{str.empty() ? default_regex : str, RegexCompileFlags::None, direction}, event, context);
}
catch (regex_error& err)
{
@ -739,12 +739,12 @@ void regex_prompt(Context& context, String prompt, String default_regex, T func)
});
}
template<SelectMode mode, Direction direction>
template<SelectMode mode, MatchDirection direction>
void search(Context& context, NormalParams params)
{
constexpr StringView prompt = mode == SelectMode::Extend ?
(direction == Forward ? "search (extend):" : "reverse search (extend):")
: (direction == Forward ? "search:" : "reverse search:");
(direction == MatchDirection::Forward ? "search (extend):" : "reverse search (extend):")
: (direction == MatchDirection::Forward ? "search:" : "reverse search:");
const char reg = to_lower(params.reg ? params.reg : '/');
const int count = params.count;
@ -753,7 +753,7 @@ void search(Context& context, NormalParams params)
Vector<String> saved_reg{reg_content.begin(), reg_content.end()};
const int main_index = std::min(context.selections().main_index(), saved_reg.size()-1);
regex_prompt(context, prompt.str(), saved_reg[main_index],
regex_prompt<direction>(context, prompt.str(), saved_reg[main_index],
[reg, count, saved_reg, main_index]
(Regex regex, PromptEvent event, Context& context) {
if (event == PromptEvent::Abort)
@ -782,14 +782,14 @@ void search(Context& context, NormalParams params)
});
}
template<SelectMode mode, Direction direction>
template<SelectMode mode, MatchDirection direction>
void search_next(Context& context, NormalParams params)
{
const char reg = to_lower(params.reg ? params.reg : '/');
StringView str = context.main_sel_register_value(reg);
if (not str.empty())
{
Regex regex{str};
Regex regex{str, RegexCompileFlags::None, direction};
auto& selections = context.selections();
bool main_wrapped = false;
do {
@ -1223,6 +1223,8 @@ void select_object(Context& context, NormalParams params)
{{'c'}, "custom object desc"}}));
}
enum Direction { Forward, Backward };
template<Direction direction, bool half = false>
void scroll(Context& context, NormalParams params)
{
@ -2050,14 +2052,14 @@ static const HashMap<Key, NormalCmd, MemoryDomain::Undefined, KeymapBackend> key
{ {'m'}, {"select to matching character", select<SelectMode::Replace, select_matching>} },
{ {'M'}, {"extend to matching character", select<SelectMode::Extend, select_matching>} },
{ {'/'}, {"select next given regex match", search<SelectMode::Replace, Forward>} },
{ {'?'}, {"extend with next given regex match", search<SelectMode::Extend, Forward>} },
{ {alt('/')}, {"select previous given regex match", search<SelectMode::Replace, Backward>} },
{ {alt('?')}, {"extend with previous given regex match", search<SelectMode::Extend, Backward>} },
{ {'n'}, {"select next current search pattern match", search_next<SelectMode::Replace, Forward>} },
{ {'N'}, {"extend with next current search pattern match", search_next<SelectMode::Append, Forward>} },
{ {alt('n')}, {"select previous current search pattern match", search_next<SelectMode::Replace, Backward>} },
{ {alt('N')}, {"extend with previous current search pattern match", search_next<SelectMode::Append, Backward>} },
{ {'/'}, {"select next given regex match", search<SelectMode::Replace, MatchDirection::Forward>} },
{ {'?'}, {"extend with next given regex match", search<SelectMode::Extend, MatchDirection::Forward>} },
{ {alt('/')}, {"select previous given regex match", search<SelectMode::Replace, MatchDirection::Backward>} },
{ {alt('?')}, {"extend with previous given regex match", search<SelectMode::Extend, MatchDirection::Backward>} },
{ {'n'}, {"select next current search pattern match", search_next<SelectMode::Replace, MatchDirection::Forward>} },
{ {'N'}, {"extend with next current search pattern match", search_next<SelectMode::Append, MatchDirection::Forward>} },
{ {alt('n')}, {"select previous current search pattern match", search_next<SelectMode::Replace, MatchDirection::Backward>} },
{ {alt('N')}, {"extend with previous current search pattern match", search_next<SelectMode::Append, MatchDirection::Backward>} },
{ {'*'}, {"set search pattern to main selection content", use_selection_as_search_pattern<true>} },
{ {alt('*')}, {"set search pattern to main selection content, do not detect words", use_selection_as_search_pattern<false>} },

13
src/regex.cc
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@ -50,13 +50,18 @@ void regex_mismatch(const Regex& re)
}
#endif
Regex::Regex(StringView re, RegexCompileFlags flags) try
: m_impl{new CompiledRegex{compile_regex(re, flags)}},
Regex::Regex(StringView re, RegexCompileFlags flags, MatchDirection direction)
: m_impl{new CompiledRegex{compile_regex(re, flags, direction)}},
m_str{re.str()}
{
#ifdef REGEX_CHECK_WITH_BOOST
, m_boost_impl{Utf8It{re.begin(), re}, Utf8It{re.end(), re}, convert_flags(flags)}
if (direction == MatchDirection::Forward) try
{
m_boost_impl.assign({Utf8It{re.begin(), re}, Utf8It{re.end(), re}, convert_flags(flags)});
}
catch (std::runtime_error& err) { throw regex_error(err.what()); }
#endif
{} catch (std::runtime_error& err) { throw regex_error(err.what()); }
}
String option_to_string(const Regex& re)
{

26
src/regex.hh
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@ -22,7 +22,8 @@ class Regex
public:
Regex() = default;
explicit Regex(StringView re, RegexCompileFlags flags = RegexCompileFlags::None);
explicit Regex(StringView re, RegexCompileFlags flags = RegexCompileFlags::None,
MatchDirection direction = MatchDirection::Forward);
bool empty() const { return m_str.empty(); }
bool operator==(const Regex& other) const { return m_str == other.m_str; }
bool operator!=(const Regex& other) const { return m_str != other.m_str; }
@ -225,24 +226,27 @@ bool regex_search(It begin, It end, const Regex& re,
}
}
template<typename It>
template<typename It, MatchDirection direction = MatchDirection::Forward>
bool regex_search(It begin, It end, MatchResults<It>& res, const Regex& re,
RegexExecFlags flags = RegexExecFlags::None)
{
try
{
Vector<It> captures;
const bool matched = regex_search(begin, end, captures, *re.impl(), flags);
const bool matched = regex_search<It, direction>(begin, end, captures, *re.impl(), flags);
#ifdef REGEX_CHECK_WITH_BOOST
auto first = (flags & RegexExecFlags::PrevAvailable) ? begin-1 : begin;
boost::match_results<RegexUtf8It<It>> boost_res;
if (not re.boost_impl().empty() and
matched != boost::regex_search<RegexUtf8It<It>>({begin, first, end}, {end, first, end},
boost_res, re.boost_impl(), convert_flags(flags)))
regex_mismatch(re);
if (not re.boost_impl().empty() and matched)
check_captures(re, boost_res, captures);
if (direction == MatchDirection::Forward)
{
auto first = (flags & RegexExecFlags::PrevAvailable) ? begin-1 : begin;
boost::match_results<RegexUtf8It<It>> boost_res;
if (not re.boost_impl().empty() and
matched != boost::regex_search<RegexUtf8It<It>>({begin, first, end}, {end, first, end},
boost_res, re.boost_impl(), convert_flags(flags)))
regex_mismatch(re);
if (not re.boost_impl().empty() and matched)
check_captures(re, boost_res, captures);
}
#endif
res = matched ? MatchResults<It>{std::move(captures)} : MatchResults<It>{};

37
src/selectors.cc
View File

@ -861,36 +861,25 @@ static bool find_prev(const Buffer& buffer, const BufferIterator& pos,
MatchResults<BufferIterator>& matches,
const Regex& ex, bool& wrapped)
{
auto find_last_match = [&](const BufferIterator& pos) {
MatchResults<BufferIterator> m;
const bool is_pos_eol = is_eol(buffer, pos.coord());
const bool is_pos_eow = is_eow(buffer, pos.coord());
auto begin = buffer.begin();
while (begin != pos and
regex_search(begin, pos, m, ex,
match_flags(is_bol(begin.coord()), is_pos_eol,
is_bow(buffer, begin.coord()), is_pos_eow)))
{
begin = utf8::next(m[0].first, pos);
if (matches.empty() or m[0].second > matches[0].second)
matches.swap(m);
}
return not matches.empty();
};
if (find_last_match(pos))
if (pos != buffer.begin() and
regex_search<BufferIterator, MatchDirection::Backward>(
buffer.begin(), pos, matches, ex,
match_flags(buffer, buffer.begin(), pos)))
return true;
wrapped = true;
return find_last_match(buffer.end());
return regex_search<BufferIterator, MatchDirection::Backward>(
buffer.begin(), buffer.end(), matches, ex,
match_flags(buffer, buffer.begin(), buffer.end()));
}
template<Direction direction>
template<MatchDirection direction>
Selection find_next_match(const Context& context, const Selection& sel, const Regex& regex, bool& wrapped)
{
auto& buffer = context.buffer();
MatchResults<BufferIterator> matches;
auto pos = buffer.iterator_at(direction == Backward ? sel.min() : sel.max());
auto pos = buffer.iterator_at(direction == MatchDirection::Backward ? sel.min() : sel.max());
wrapped = false;
const bool found = (direction == Forward) ?
const bool found = (direction == MatchDirection::Forward) ?
find_next(buffer, utf8::next(pos, buffer.end()), matches, regex, wrapped)
: find_prev(buffer, pos, matches, regex, wrapped);
@ -903,13 +892,13 @@ Selection find_next_match(const Context& context, const Selection& sel, const Re
auto begin = matches[0].first, end = matches[0].second;
end = (begin == end) ? end : utf8::previous(end, begin);
if (direction == Backward)
if (direction == MatchDirection::Backward)
std::swap(begin, end);
return {begin.coord(), end.coord(), std::move(captures)};
}
template Selection find_next_match<Forward>(const Context&, const Selection&, const Regex&, bool&);
template Selection find_next_match<Backward>(const Context&, const Selection&, const Regex&, bool&);
template Selection find_next_match<MatchDirection::Forward>(const Context&, const Selection&, const Regex&, bool&);
template Selection find_next_match<MatchDirection::Backward>(const Context&, const Selection&, const Regex&, bool&);
using RegexIt = RegexIterator<BufferIterator>;

4
src/selectors.hh
View File

@ -98,9 +98,9 @@ trim_partial_lines(const Context& context, const Selection& selection);
void select_buffer(SelectionList& selections);
enum Direction { Forward, Backward };
enum class MatchDirection;
template<Direction direction>
template<MatchDirection direction>
Selection find_next_match(const Context& context, const Selection& sel,
const Regex& regex, bool& wrapped);