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Finally deprecated callbacks.
[wxWidgets.git] / src / common / fs_mem.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: fs_mem.cpp
3 // Purpose: in-memory file system
4 // Author: Vaclav Slavik
5 // Copyright: (c) 2000 Vaclav Slavik
6 // Licence: wxWindows Licence
7 /////////////////////////////////////////////////////////////////////////////
8
9
10 #ifdef __GNUG__
11 #pragma implementation
12 #endif
13
14 #include "wx/wxprec.h"
15
16 #ifdef __BORDLANDC__
17 #pragma hdrstop
18 #endif
19
20 #if wxUSE_FILESYSTEM && wxUSE_STREAMS
21
22 #ifndef WXPRECOMP
23 #include "wx/wx.h"
24 #endif
25
26 #include "wx/filesys.h"
27 #include "wx/fs_mem.h"
28 #include "wx/mstream.h"
29
30
31 class MemFSHashObj : public wxObject
32 {
33 public:
34
35 MemFSHashObj(const void *data, size_t len)
36 {
37 m_Data = new char[len];
38 memcpy(m_Data, data, len);
39 m_Len = len;
40 m_Time = wxDateTime::Now();
41 }
42
43 MemFSHashObj(wxMemoryOutputStream& stream)
44 {
45 m_Len = stream.GetSize();
46 m_Data = new char[m_Len];
47 stream.CopyTo(m_Data, m_Len);
48 m_Time = wxDateTime::Now();
49 }
50
51 ~MemFSHashObj()
52 {
53 delete[] m_Data;
54 }
55
56 char *m_Data;
57 size_t m_Len;
58 wxDateTime m_Time;
59 };
60
61
62 //--------------------------------------------------------------------------------
63 // wxMemoryFSHandler
64 //--------------------------------------------------------------------------------
65
66
67 wxHashTable *wxMemoryFSHandler::m_Hash = NULL;
68
69
70 wxMemoryFSHandler::wxMemoryFSHandler() : wxFileSystemHandler()
71 {
72 m_Hash = NULL;
73 }
74
75
76
77 wxMemoryFSHandler::~wxMemoryFSHandler()
78 {
79 // as only one copy of FS handler is supposed to exist, we may silently
80 // delete static data here. (There is no way how to remove FS handler from
81 // wxFileSystem other than releasing _all_ handlers.)
82
83 if (m_Hash) delete m_Hash;
84 m_Hash = NULL;
85 }
86
87
88
89 bool wxMemoryFSHandler::CanOpen(const wxString& location)
90 {
91 wxString p = GetProtocol(location);
92 return (p == wxT("memory"));
93 }
94
95
96
97
98 wxFSFile* wxMemoryFSHandler::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString& location)
99 {
100 if (m_Hash)
101 {
102 MemFSHashObj *obj = (MemFSHashObj*) m_Hash -> Get(GetRightLocation(location));
103 if (obj == NULL) return NULL;
104 else return new wxFSFile(new wxMemoryInputStream(obj -> m_Data, obj -> m_Len),
105 location,
106 GetMimeTypeFromExt(location),
107 GetAnchor(location),
108 obj -> m_Time);
109 }
110 else return NULL;
111 }
112
113
114
115 wxString wxMemoryFSHandler::FindFirst(const wxString& spec, int flags)
116 {
117 wxLogWarning(wxT("wxMemoryFSHandler::FindFirst not implemented"));
118 return wxEmptyString;
119 }
120
121
122
123 wxString wxMemoryFSHandler::FindNext()
124 {
125 wxLogWarning(wxT("wxMemoryFSHandler::FindNext not implemented"));
126 return wxEmptyString;
127 }
128
129
130
131 bool wxMemoryFSHandler::CheckHash(const wxString& filename)
132 {
133 if (m_Hash == NULL)
134 {
135 m_Hash = new wxHashTable(wxKEY_STRING);
136 m_Hash -> DeleteContents(TRUE);
137 }
138
139 if (m_Hash -> Get(filename) != NULL)
140 {
141 wxString s;
142 s.Printf(_("Memory VFS already contains file '%s'!"), filename.c_str());
143 wxLogError(s);
144 return FALSE;
145 }
146 else
147 return TRUE;
148 }
149
150
151
152 #if wxUSE_GUI
153
154 /*static*/ void wxMemoryFSHandler::AddFile(const wxString& filename, wxImage& image, long type)
155 {
156 if (!CheckHash(filename)) return;
157
158
159 wxMemoryOutputStream mems;
160 if (image.Ok() && image.SaveFile(mems, type))
161 m_Hash -> Put(filename, new MemFSHashObj(mems));
162 else
163 {
164 wxString s;
165 s.Printf(_("Failed to store image '%s' to memory VFS!"), filename.c_str());
166 printf("'%s'\n", s.c_str());
167 wxLogError(s);
168 }
169 }
170
171
172 /*static*/ void wxMemoryFSHandler::AddFile(const wxString& filename, const wxBitmap& bitmap, long type)
173 {
174 wxImage img(bitmap);
175 AddFile(filename, img, type);
176 }
177
178 #endif
179
180 /*static*/ void wxMemoryFSHandler::AddFile(const wxString& filename, const wxString& textdata)
181 {
182 AddFile(filename, (const void*) textdata.mb_str(), textdata.Length());
183 }
184
185
186 /*static*/ void wxMemoryFSHandler::AddFile(const wxString& filename, const void *binarydata, size_t size)
187 {
188 if (!CheckHash(filename)) return;
189 m_Hash -> Put(filename, new MemFSHashObj(binarydata, size));
190 }
191
192
193
194 /*static*/ void wxMemoryFSHandler::RemoveFile(const wxString& filename)
195 {
196 if (m_Hash == NULL ||
197 m_Hash -> Get(filename) == NULL)
198 {
199 wxString s;
200 s.Printf(_("Trying to remove file '%s' from memory VFS, but it is not loaded!"), filename.c_str());
201 wxLogError(s);
202 }
203
204 else
205 delete m_Hash -> Delete(filename);
206 }
207
208
209
210 #endif // wxUSE_FILESYSTEM && wxUSE_FS_ZIP