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"
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 &);
49 virtual ~FileName() {}
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;
90 /// \return true when file/directory is writable (write test file)
91 /// \param overwrite: set to true if we should erase the \c target
92 /// file if it exists,
93 bool copyTo(FileName const & target, bool overwrite = false) const;
95 /// remove pointed file.
96 /// \retrun true on success.
97 bool removeFile() const;
99 /// remove directory and all contents, returns true on success
100 bool destroyDirectory() const;
101 /// Creates directory. Returns true on success
102 bool createDirectory(int permissions) const;
104 /// \return list files in a directory having optional extension ext..
105 std::vector<FileName> dirList(
106 std::string const & ext = std::string());
108 /// Get the contents of a file as a huge std::string
109 std::string fileContents() const;
111 * Get a FileName from \p name in the encoding used by the file system.
112 * Only use this for filenames you got directly from the file system,
113 * e.g. from reading a directory.
114 * \p name must have an absolute path.
117 /// Change extension.
119 * If oldname does not have an extension, it is appended.
120 * If the extension is empty, any extension is removed from the name.
122 void changeExtension(std::string const & extension);
124 /** Guess the file format name (as in Format::name()) from contents.
125 Normally you don't want to use this directly, but rather
126 Formats::getFormatFromFile().
128 std::string guessFormatFromContents() const;
130 /// check for zipped file
131 bool isZippedFile() const;
133 static FileName fromFilesystemEncoding(std::string const & name);
134 /// (securely) create a temporary file in the given dir with the given mask
135 /// \p mask must be in filesystem encoding
136 static FileName tempName(FileName const & dir = FileName(),
137 std::string const & mask = std::string());
139 /// filename without path
140 std::string onlyFileName() const;
141 /// path without file name
142 FileName onlyPath() const;
143 /// used for display in the Gui
144 docstring displayName(int threshold = 1000) const;
147 friend class DocFileName;
154 bool operator==(FileName const &, FileName const &);
155 bool operator!=(FileName const &, FileName const &);
156 bool operator<(FileName const &, FileName const &);
157 bool operator>(FileName const &, FileName const &);
158 std::ostream & operator<<(std::ostream &, FileName const &);
162 * Class for storing file names that appear in documents (e. g. child
163 * documents, included figures etc).
164 * The file name must not denote a file in our temporary directory, but a
165 * file that the user chose.
167 class DocFileName : public FileName {
170 /** \param abs_filename the file in question. Must have an absolute path.
171 * \param save_abs_path how is the file to be output to file?
173 DocFileName(std::string const & abs_filename, bool save_abs_path = true);
174 DocFileName(FileName const & abs_filename, bool save_abs_path = true);
176 /** \param filename the file in question. May have either a relative
177 * or an absolute path.
178 * \param buffer_path if \c filename has a relative path, generate
179 * the absolute path using this.
181 void set(std::string const & filename, std::string const & buffer_path);
185 bool saveAbsPath() const { return save_abs_path_; }
186 /// \param buffer_path if empty, uses `pwd`
187 std::string const relFilename(std::string const & buffer_path = std::string()) const;
188 /// \param buf_path if empty, uses `pwd`
189 std::string const outputFilename(std::string const & buf_path = std::string()) const;
191 /** @returns a mangled representation of the absolute file name
192 * suitable for use in the temp dir when, for example, converting
193 * an image file to another format.
195 * @param dir the directory that will contain this file with
196 * its mangled name. This information is used by the mangling
197 * algorithm when determining the maximum allowable length of
200 * An example of a mangled name:
201 * C:/foo bar/baz.eps -> 0C__foo_bar_baz.eps
203 * It is guaranteed that
204 * - two different filenames have different mangled names
205 * - two FileName instances with the same filename have identical
208 * Only the mangled file name is returned. It is not prepended
212 mangledFilename(std::string const & dir = std::string()) const;
214 /// \return true if the file is compressed.
215 bool isZipped() const;
216 /// \return the absolute file name without its .gz, .z, .Z extension
217 std::string const unzippedFilename() const;
221 /// Cache for isZipped() because zippedFile() is expensive
222 mutable bool zipped_;
223 /// Is zipped_ valid?
224 mutable bool zipped_valid_;
228 bool operator==(DocFileName const &, DocFileName const &);
229 bool operator!=(DocFileName const &, DocFileName const &);
232 } // namespace support