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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: src/common/fs_mem.cpp | |
3 | // Purpose: in-memory file system | |
4 | // Author: Vaclav Slavik | |
5 | // RCS-ID: $Id$ | |
6 | // Copyright: (c) 2000 Vaclav Slavik | |
7 | // Licence: wxWindows licence | |
8 | ///////////////////////////////////////////////////////////////////////////// | |
9 | ||
10 | #include "wx/wxprec.h" | |
11 | ||
12 | #ifdef __BORLANDC__ | |
13 | #pragma hdrstop | |
14 | #endif | |
15 | ||
16 | #if wxUSE_FILESYSTEM && wxUSE_STREAMS | |
17 | ||
18 | #include "wx/fs_mem.h" | |
19 | ||
20 | #ifndef WX_PRECOMP | |
21 | #include "wx/intl.h" | |
22 | #include "wx/log.h" | |
23 | #include "wx/wxcrtvararg.h" | |
24 | #if wxUSE_GUI | |
25 | #include "wx/image.h" | |
26 | #endif // wxUSE_GUI | |
27 | #endif | |
28 | ||
29 | #include "wx/mstream.h" | |
30 | ||
31 | // represents a file entry in wxMemoryFS | |
32 | class wxMemoryFSFile | |
33 | { | |
34 | public: | |
35 | wxMemoryFSFile(const void *data, size_t len, const wxString& mime) | |
36 | { | |
37 | m_Data = new char[len]; | |
38 | memcpy(m_Data, data, len); | |
39 | m_Len = len; | |
40 | m_MimeType = mime; | |
41 | InitTime(); | |
42 | } | |
43 | ||
44 | wxMemoryFSFile(const wxMemoryOutputStream& stream, const wxString& mime) | |
45 | { | |
46 | m_Len = stream.GetSize(); | |
47 | m_Data = new char[m_Len]; | |
48 | stream.CopyTo(m_Data, m_Len); | |
49 | m_MimeType = mime; | |
50 | InitTime(); | |
51 | } | |
52 | ||
53 | virtual ~wxMemoryFSFile() | |
54 | { | |
55 | delete[] m_Data; | |
56 | } | |
57 | ||
58 | char *m_Data; | |
59 | size_t m_Len; | |
60 | wxString m_MimeType; | |
61 | #if wxUSE_DATETIME | |
62 | wxDateTime m_Time; | |
63 | #endif // wxUSE_DATETIME | |
64 | ||
65 | private: | |
66 | void InitTime() | |
67 | { | |
68 | #if wxUSE_DATETIME | |
69 | m_Time = wxDateTime::Now(); | |
70 | #endif // wxUSE_DATETIME | |
71 | } | |
72 | ||
73 | DECLARE_NO_COPY_CLASS(wxMemoryFSFile) | |
74 | }; | |
75 | ||
76 | #if wxUSE_BASE | |
77 | ||
78 | ||
79 | //-------------------------------------------------------------------------------- | |
80 | // wxMemoryFSHandler | |
81 | //-------------------------------------------------------------------------------- | |
82 | ||
83 | ||
84 | wxMemoryFSHash wxMemoryFSHandlerBase::m_Hash; | |
85 | ||
86 | ||
87 | wxMemoryFSHandlerBase::wxMemoryFSHandlerBase() : wxFileSystemHandler() | |
88 | { | |
89 | } | |
90 | ||
91 | wxMemoryFSHandlerBase::~wxMemoryFSHandlerBase() | |
92 | { | |
93 | // as only one copy of FS handler is supposed to exist, we may silently | |
94 | // delete static data here. (There is no way how to remove FS handler from | |
95 | // wxFileSystem other than releasing _all_ handlers.) | |
96 | WX_CLEAR_HASH_MAP(wxMemoryFSHash, m_Hash); | |
97 | } | |
98 | ||
99 | bool wxMemoryFSHandlerBase::CanOpen(const wxString& location) | |
100 | { | |
101 | return GetProtocol(location) == "memory"; | |
102 | } | |
103 | ||
104 | wxFSFile * wxMemoryFSHandlerBase::OpenFile(wxFileSystem& WXUNUSED(fs), | |
105 | const wxString& location) | |
106 | { | |
107 | wxMemoryFSHash::const_iterator i = m_Hash.find(GetRightLocation(location)); | |
108 | if ( i == m_Hash.end() ) | |
109 | return NULL; | |
110 | ||
111 | const wxMemoryFSFile * const obj = i->second; | |
112 | ||
113 | return new wxFSFile | |
114 | ( | |
115 | new wxMemoryInputStream(obj->m_Data, obj->m_Len), | |
116 | location, | |
117 | obj->m_MimeType, | |
118 | GetAnchor(location) | |
119 | #if wxUSE_DATETIME | |
120 | , obj->m_Time | |
121 | #endif // wxUSE_DATETIME | |
122 | ); | |
123 | } | |
124 | ||
125 | wxString wxMemoryFSHandlerBase::FindFirst(const wxString& url, int flags) | |
126 | { | |
127 | if ( (flags & wxDIR) && !(flags & wxFILE) ) | |
128 | { | |
129 | // we only store files, not directories, so we don't risk finding | |
130 | // anything | |
131 | return wxString(); | |
132 | } | |
133 | ||
134 | const wxString spec = GetRightLocation(url); | |
135 | if ( spec.find_first_of("?*") == wxString::npos ) | |
136 | { | |
137 | // simple case: there are no wildcard characters so we can return | |
138 | // either 0 or 1 results and we can find the potential match quickly | |
139 | return m_Hash.count(spec) ? url : wxString(); | |
140 | } | |
141 | //else: deal with wildcards in FindNext() | |
142 | ||
143 | m_findArgument = spec; | |
144 | m_findIter = m_Hash.begin(); | |
145 | ||
146 | return FindNext(); | |
147 | } | |
148 | ||
149 | wxString wxMemoryFSHandlerBase::FindNext() | |
150 | { | |
151 | // m_findArgument is used to indicate that search is in progress, we reset | |
152 | // it to empty string after iterating over all elements | |
153 | while ( !m_findArgument.empty() ) | |
154 | { | |
155 | // test for the match before (possibly) clearing m_findArgument below | |
156 | const bool found = m_findIter->first.Matches(m_findArgument); | |
157 | ||
158 | // advance m_findIter first as we need to do it anyhow, whether it | |
159 | // matches or not | |
160 | const wxMemoryFSHash::const_iterator current = m_findIter; | |
161 | ||
162 | if ( ++m_findIter == m_Hash.end() ) | |
163 | m_findArgument.clear(); | |
164 | ||
165 | if ( found ) | |
166 | return "memory:" + current->first; | |
167 | } | |
168 | ||
169 | return wxString(); | |
170 | } | |
171 | ||
172 | bool wxMemoryFSHandlerBase::CheckDoesntExist(const wxString& filename) | |
173 | { | |
174 | if ( m_Hash.count(filename) ) | |
175 | { | |
176 | wxLogError(_("Memory VFS already contains file '%s'!"), filename); | |
177 | return false; | |
178 | } | |
179 | ||
180 | return true; | |
181 | } | |
182 | ||
183 | ||
184 | /*static*/ | |
185 | void wxMemoryFSHandlerBase::AddFileWithMimeType(const wxString& filename, | |
186 | const wxString& textdata, | |
187 | const wxString& mimetype) | |
188 | { | |
189 | AddFileWithMimeType(filename, | |
190 | (const void*) textdata.mb_str(), textdata.length(), | |
191 | mimetype); | |
192 | } | |
193 | ||
194 | ||
195 | /*static*/ | |
196 | void wxMemoryFSHandlerBase::AddFileWithMimeType(const wxString& filename, | |
197 | const void *binarydata, size_t size, | |
198 | const wxString& mimetype) | |
199 | { | |
200 | if ( !CheckDoesntExist(filename) ) | |
201 | return; | |
202 | ||
203 | m_Hash[filename] = new wxMemoryFSFile(binarydata, size, mimetype); | |
204 | } | |
205 | ||
206 | /*static*/ | |
207 | void wxMemoryFSHandlerBase::AddFile(const wxString& filename, | |
208 | const wxString& textdata) | |
209 | { | |
210 | AddFileWithMimeType(filename, textdata, wxEmptyString); | |
211 | } | |
212 | ||
213 | ||
214 | /*static*/ | |
215 | void wxMemoryFSHandlerBase::AddFile(const wxString& filename, | |
216 | const void *binarydata, size_t size) | |
217 | { | |
218 | AddFileWithMimeType(filename, binarydata, size, wxEmptyString); | |
219 | } | |
220 | ||
221 | ||
222 | ||
223 | /*static*/ void wxMemoryFSHandlerBase::RemoveFile(const wxString& filename) | |
224 | { | |
225 | wxMemoryFSHash::iterator i = m_Hash.find(filename); | |
226 | if ( i == m_Hash.end() ) | |
227 | { | |
228 | wxLogError(_("Trying to remove file '%s' from memory VFS, " | |
229 | "but it is not loaded!"), | |
230 | filename); | |
231 | return; | |
232 | } | |
233 | ||
234 | delete i->second; | |
235 | m_Hash.erase(i); | |
236 | } | |
237 | ||
238 | #endif // wxUSE_BASE | |
239 | ||
240 | #if wxUSE_GUI | |
241 | ||
242 | #if wxUSE_IMAGE | |
243 | /*static*/ void | |
244 | wxMemoryFSHandler::AddFile(const wxString& filename, | |
245 | const wxImage& image, | |
246 | wxBitmapType type) | |
247 | { | |
248 | if ( !CheckDoesntExist(filename) ) | |
249 | return; | |
250 | ||
251 | wxMemoryOutputStream mems; | |
252 | if ( image.Ok() && image.SaveFile(mems, type) ) | |
253 | { | |
254 | m_Hash[filename] = new wxMemoryFSFile | |
255 | ( | |
256 | mems, | |
257 | wxImage::FindHandler(type)->GetMimeType() | |
258 | ); | |
259 | } | |
260 | else | |
261 | { | |
262 | wxLogError(_("Failed to store image '%s' to memory VFS!"), filename); | |
263 | } | |
264 | } | |
265 | ||
266 | /*static*/ void | |
267 | wxMemoryFSHandler::AddFile(const wxString& filename, | |
268 | const wxBitmap& bitmap, | |
269 | wxBitmapType type) | |
270 | { | |
271 | wxImage img = bitmap.ConvertToImage(); | |
272 | AddFile(filename, img, type); | |
273 | } | |
274 | ||
275 | #endif // wxUSE_IMAGE | |
276 | ||
277 | #endif // wxUSE_GUI | |
278 | ||
279 | ||
280 | #endif // wxUSE_FILESYSTEM && wxUSE_FS_ZIP |