4 * This file is part of LyX, the document processor.
5 * Licence details can be found in the file COPYING.
7 * \author Angus Leeming
9 * Full author contact details are available in file CREDITS.
15 #include "support/strfwd.h"
23 /// Defined in "FileNameList.h".
27 * Class for storing file names.
28 * The file name may be empty. If it is not empty it is an absolute path.
29 * The file may or may not exist.
33 /// Constructor for empty filenames
35 /** Constructor for nonempty filenames.
36 * explicit because we don't want implicit conversion of relative
37 * paths in function arguments (e.g. of unlink).
38 * \param abs_filename the file in question. Must have an absolute path.
39 * Encoding is always UTF-8.
41 explicit FileName(std::string const & abs_filename);
44 FileName(FileName const &);
47 FileName & operator=(FileName const &);
50 /** Set a new filename.
51 * \param filename the file in question. Must have an absolute path.
52 * Encoding is always UTF-8.
54 virtual void set(std::string const & filename);
56 /// Is this filename empty?
58 /// get the absolute file name in UTF-8 encoding
59 std::string absFilename() const;
61 * Get the file name in the encoding used by the file system.
62 * Only use this for accessing the file, e.g. with an fstream.
64 std::string toFilesystemEncoding() const;
66 /// returns true if the file exists
68 /// \return true if this object points to a symbolic link.
69 bool isSymLink() const;
70 /// \return true if the file is empty.
71 bool isFileEmpty() const;
72 /// returns time of last write access
73 std::time_t lastModified() const;
74 /// generates a checksum of a file
75 unsigned long checksum() const;
76 /// return true when file is readable but not writabel
77 bool isReadOnly() const;
78 /// return true when it names a directory
79 bool isDirectory() const;
80 /// return true when file/directory is readable
81 bool isReadableDirectory() const;
82 /// return true when it is a file and readable
83 bool isReadableFile() const;
84 /// return true when file/directory is writable
85 bool isWritable() const;
86 /// return true when file/directory is writable (write test file)
87 bool isDirWritable() const;
88 /// \return list other files in the directory having optional extension 'ext'.
89 FileNameList dirList(std::string const & ext) const;
92 /// \return true when file/directory is writable (write test file)
93 /// \param overwrite: set to true if we should erase the \c target
94 /// file if it exists,
95 bool copyTo(FileName const & target, bool overwrite = false) const;
97 /// remove pointed file.
98 /// \retrun true on success.
99 bool removeFile() const;
101 /// rename pointed file.
102 /// \retrun true on success.
103 bool renameTo(FileName const & target) const;
105 /// change mode of pointed file.
106 /// \retrun true on success.
107 bool changeMode(unsigned long int mode) const;
109 /// remove directory and all contents, returns true on success
110 bool destroyDirectory() const;
111 /// Creates directory. Returns true on success
112 bool createDirectory(int permissions) const;
114 /// Get the contents of a file as a huge docstring.
115 /// \param encoding defines the encoding of the file contents.
116 /// Only four encodings are supported:
117 /// "UTF-8", "ascii", "latin1" and "local8bit" which uses the
118 /// current system locale.
119 docstring fileContents(std::string const & encoding) const;
121 /// Change extension.
123 * If oldname does not have an extension, it is appended.
124 * If the extension is empty, any extension is removed from the name.
126 void changeExtension(std::string const & extension);
128 /** Guess the file format name (as in Format::name()) from contents.
129 Normally you don't want to use this directly, but rather
130 Formats::getFormatFromFile().
132 std::string guessFormatFromContents() const;
134 /// check for zipped file
135 bool isZippedFile() const;
137 static FileName fromFilesystemEncoding(std::string const & name);
138 /// (securely) create a temporary file in the given dir with the given mask
139 /// \p mask must be in filesystem encoding
140 static FileName tempName(FileName const & dir = FileName(),
141 std::string const & mask = empty_string());
143 /// filename without path
144 std::string onlyFileName() const;
145 /// path without file name
146 FileName onlyPath() const;
147 /// used for display in the Gui
148 docstring displayName(int threshold = 1000) const;
150 /// change to a directory, return success
153 /// \param buffer_path if empty, uses `pwd`
154 docstring const relPath(std::string const & path) const;
156 docstring const absoluteFilePath() const;
165 bool operator==(FileName const &, FileName const &);
166 bool operator!=(FileName const &, FileName const &);
167 bool operator<(FileName const &, FileName const &);
168 bool operator>(FileName const &, FileName const &);
169 std::ostream & operator<<(std::ostream &, FileName const &);
173 * Class for storing file names that appear in documents (e. g. child
174 * documents, included figures etc).
175 * The file name must not denote a file in our temporary directory, but a
176 * file that the user chose.
178 class DocFileName : public FileName {
181 /** \param abs_filename the file in question. Must have an absolute path.
182 * \param save_abs_path how is the file to be output to file?
184 DocFileName(std::string const & abs_filename, bool save_abs_path = true);
185 DocFileName(FileName const & abs_filename, bool save_abs_path = true);
187 /** \param filename the file in question. May have either a relative
188 * or an absolute path.
189 * \param buffer_path if \c filename has a relative path, generate
190 * the absolute path using this.
192 void set(std::string const & filename, std::string const & buffer_path);
196 bool saveAbsPath() const { return save_abs_path_; }
197 /// \param buffer_path if empty, uses `pwd`
198 std::string relFilename(std::string const & buffer_path = empty_string()) const;
199 /// \param buf_path if empty, uses `pwd`
200 std::string outputFilename(std::string const & buf_path = empty_string()) const;
202 /** @returns a mangled representation of the absolute file name
203 * suitable for use in the temp dir when, for example, converting
204 * an image file to another format.
206 * @param dir the directory that will contain this file with
207 * its mangled name. This information is used by the mangling
208 * algorithm when determining the maximum allowable length of
211 * An example of a mangled name:
212 * C:/foo bar/baz.eps -> 0C__foo_bar_baz.eps
214 * It is guaranteed that
215 * - two different filenames have different mangled names
216 * - two FileName instances with the same filename have identical
219 * Only the mangled file name is returned. It is not prepended
223 mangledFilename(std::string const & dir = empty_string()) const;
225 /// \return true if the file is compressed.
226 bool isZipped() const;
227 /// \return the absolute file name without its .gz, .z, .Z extension
228 std::string unzippedFilename() const;
232 /// Cache for isZipped() because zippedFile() is expensive
233 mutable bool zipped_;
234 /// Is zipped_ valid?
235 mutable bool zipped_valid_;
239 bool operator==(DocFileName const &, DocFileName const &);
240 bool operator!=(DocFileName const &, DocFileName const &);
242 } // namespace support