2 * \file FileFilterList.cpp
3 * This file is part of LyX, the document processor.
4 * Licence details can be found in the file COPYING.
6 * \author Angus Leeming
8 * Full author contact details are available in file CREDITS.
13 #include "support/FileFilterList.h"
15 #include "support/lstrings.h"
16 #include "support/gettext.h"
18 #include <boost/regex.hpp>
19 #include <boost/tokenizer.hpp>
27 /** Given a string such as
28 * "<glob> <glob> ... *.{abc,def} <glob>",
29 * convert the csh-style brace expresions:
30 * "<glob> <glob> ... *.abc *.def <glob>".
31 * Requires no system support, so should work equally on Unix, Mac, Win32.
33 string const convert_brace_glob(string const & glob)
35 // Matches " *.{abc,def,ghi}", storing "*." as group 1 and
36 // "abc,def,ghi" as group 2.
37 static boost::regex const glob_re(" *([^ {]*)\\{([^ }]+)\\}");
38 // Matches "abc" and "abc,", storing "abc" as group 1.
39 static boost::regex const block_re("([^,}]+),?");
43 string::const_iterator it = glob.begin();
44 string::const_iterator const end = glob.end();
46 boost::match_results<string::const_iterator> what;
47 if (!boost::regex_search(it, end, what, glob_re)) {
48 // Ensure that no information is lost.
49 pattern += string(it, end);
53 // Everything from the start of the input to
54 // the start of the match.
55 pattern += string(what[-1].first, what[-1].second);
57 // Given " *.{abc,def}", head == "*." and tail == "abc,def".
58 string const head = string(what[1].first, what[1].second);
59 string const tail = string(what[2].first, what[2].second);
61 // Split the ','-separated chunks of tail so that
62 // $head{$chunk1,$chunk2} becomes "$head$chunk1 $head$chunk2".
63 string const fmt = " " + head + "$1";
64 pattern += boost::regex_merge(tail, block_re, fmt);
66 // Increment the iterator to the end of the match.
67 it += distance(it, what[0].second);
79 FileFilterList::Filter::Filter(docstring const & description,
83 typedef boost::tokenizer<boost::char_separator<char> > Tokenizer;
84 boost::char_separator<char> const separator(" ");
86 // Given "<glob> <glob> ... *.{abc,def} <glob>", expand to
87 // "<glob> <glob> ... *.abc *.def <glob>"
88 string const expanded_globs = convert_brace_glob(globs);
90 // Split into individual globs.
91 vector<string> matches;
92 Tokenizer const tokens(expanded_globs, separator);
93 globs_ = vector<string>(tokens.begin(), tokens.end());
97 FileFilterList::FileFilterList(docstring const & qt_style_filter)
100 string const filter = to_utf8(qt_style_filter)
101 + (qt_style_filter.empty() ? string() : ";;")
102 + to_utf8(_("All files (*)"));
104 // Split data such as "TeX documents (*.tex);;LyX Documents (*.lyx)"
105 // into individual filters.
106 static boost::regex const separator_re(";;");
108 string::const_iterator it = filter.begin();
109 string::const_iterator const end = filter.end();
111 boost::match_results<string::const_iterator> what;
113 if (!boost::regex_search(it, end, what, separator_re)) {
114 parse_filter(string(it, end));
118 // Everything from the start of the input to
119 // the start of the match.
120 parse_filter(string(what[-1].first, what[-1].second));
122 // Increment the iterator to the end of the match.
123 it += distance(it, what[0].second);
128 void FileFilterList::parse_filter(string const & filter)
130 // Matches "TeX documents (*.tex)",
131 // storing "TeX documents " as group 1 and "*.tex" as group 2.
132 static boost::regex const filter_re("([^(]*)\\(([^)]+)\\) *$");
134 boost::match_results<string::const_iterator> what;
135 if (!boost::regex_search(filter, what, filter_re)) {
136 // Just a glob, no description.
137 filters_.push_back(Filter(docstring(), trim(filter)));
140 docstring const desc = from_utf8(string(what[1].first, what[1].second));
141 string const globs = string(what[2].first, what[2].second);
142 filters_.push_back(Filter(trim(desc), trim(globs)));
147 docstring const FileFilterList::as_string() const
152 vector<Filter>::const_iterator fit = filters_.begin();
153 vector<Filter>::const_iterator const fend = filters_.end();
154 for (; fit != fend; ++fit) {
155 Filter::glob_iterator const gbegin = fit->begin();
156 Filter::glob_iterator const gend = fit->end();
163 bool const has_description = !fit->description().empty();
165 ss << to_utf8(fit->description()) << " (";
167 for (Filter::glob_iterator git = gbegin; git != gend; ++git) {
177 return from_utf8(ss.str());
180 } // namespace support