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FindAdv: Search for 'whole words' with help of modified regex.

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This commit is contained in:
Kornel Benko 2021-01-10 22:58:58 +01:00
parent 2844a4ec06
commit 29b9dd8b2f
2 changed files with 46 additions and 4 deletions
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48
src/lyxfind.cpp
View File

@ -893,7 +893,7 @@ static MatchResult::range interpretMatch(MatchResult &oldres, MatchResult &newre
class MatchStringAdv {
public:
MatchStringAdv(lyx::Buffer & buf, FindAndReplaceOptions const & opt);
MatchStringAdv(lyx::Buffer & buf, FindAndReplaceOptions & opt);
/** Tests if text starting at the supplied position matches with the one provided to the MatchStringAdv
** constructor as opt.search, under the opt.* options settings.
@ -2971,7 +2971,32 @@ void MatchStringAdv::CreateRegexp(FindAndReplaceOptions const & opt, string rege
#endif
}
MatchStringAdv::MatchStringAdv(lyx::Buffer & buf, FindAndReplaceOptions const & opt)
static void modifyRegexForMatchWord(string &t)
{
string s("");
regex wordre("(\\\\)*((\\.|\\\\b))");
size_t lastpos = 0;
smatch sub;
for (sregex_iterator it(t.begin(), t.end(), wordre), end; it != end; ++it) {
sub = *it;
if ((sub.position(2) - sub.position(0)) % 2 == 1) {
continue;
}
else if (sub.str(2) == "\\\\b")
return;
if (lastpos < (size_t) sub.position(2))
s += t.substr(lastpos, sub.position(2) - lastpos);
s += "\\S";
lastpos = sub.position(2) + sub.length(2);
}
if (lastpos == 0)
return;
else if (lastpos < t.length())
s += t.substr(lastpos, t.length() - lastpos);
t = "\\b" + s + "\\b";
}
MatchStringAdv::MatchStringAdv(lyx::Buffer & buf, FindAndReplaceOptions & opt)
: p_buf(&buf), p_first_buf(&buf), opt(opt)
{
static std::regex specialChars { R"([-[\]{}()*+?.,\^$|#\s\\])" };
@ -3006,6 +3031,12 @@ MatchStringAdv::MatchStringAdv(lyx::Buffer & buf, FindAndReplaceOptions const &
string lead_as_regex_string = std::regex_replace(lead_as_string, specialChars, R"(\$&)" );
par_as_string_nolead = par_as_string.substr(lead_size, par_as_string.size() - lead_size);
string par_as_regex_string_nolead = std::regex_replace(par_as_string_nolead, specialChars, R"(\$&)" );
/* Handle whole words too in this case
*/
if (opt.matchword) {
par_as_regex_string_nolead = "\\b" + par_as_regex_string_nolead + "\\b";
opt.matchword = false;
}
string regexp_str = "(" + lead_as_regex_string + ")()" + par_as_regex_string_nolead;
string regexp2_str = "(" + lead_as_regex_string + ")(.*?)" + par_as_regex_string_nolead;
CreateRegexp(opt, regexp_str, regexp2_str);
@ -3085,6 +3116,17 @@ MatchStringAdv::MatchStringAdv(lyx::Buffer & buf, FindAndReplaceOptions const &
string dest = "\\" + std::to_string(i+2);
while (regex_replace(par_as_string, par_as_string, orig, dest));
}
/* opt.matchword is ignored if using regex
but expanding par_as_string with "\\b" is not appropriate here
if regex contains for instance '.*' or '.+'
1.) Nothing to do, if 'par_as_string' contains "\\b" already.
(Means, that the user knows how to handle whole words
2.) else replace '.' with "\\S" and prepend + append "\\b"
*/
if (opt.matchword) {
modifyRegexForMatchWord(par_as_string);
opt.matchword = false;
}
regexp_str = "(" + lead_as_regexp + ")()" + par_as_string;
regexp2_str = "(" + lead_as_regexp + ")(.*?)" + par_as_string;
}
@ -4179,7 +4221,7 @@ static int findAdvReplace(BufferView * bv, FindAndReplaceOptions const & opt, Ma
/// Perform a FindAdv operation.
bool findAdv(BufferView * bv, FindAndReplaceOptions const & opt)
bool findAdv(BufferView * bv, FindAndReplaceOptions & opt)
{
DocIterator cur;
int pos_len = 0;

2
src/lyxfind.h
View File

@ -125,7 +125,7 @@ std::ostringstream & operator<<(std::ostringstream & os, lyx::FindAndReplaceOpti
std::istringstream & operator>>(std::istringstream & is, lyx::FindAndReplaceOptions & opt);
/// Perform a FindAdv operation.
bool findAdv(BufferView * bv, FindAndReplaceOptions const & opt);
bool findAdv(BufferView * bv, FindAndReplaceOptions & opt);
/** Computes the simple-text or LaTeX export (depending on opt) of buf starting
** from cur and ending len positions after cur, if len is positive, or at the