Source Code for Module conduit.datatypes.Photo

 1  import conduit 
 2   
 3  import conduit.datatypes.File as File 
 4  import conduit.utils as Utils 
 5   
 6  PRESET_ENCODINGS = { 
 7      "jpeg":{'formats':'image/jpeg','default-format':'image/jpeg'}, 
 8      "png":{'formats':'image/png','default-format':'image/png'} 
 9      } 
10       
11 -def mimetype_is_photo(mimetype): 
12      """ 
13      @returns: True if the given mimetype string represents an image file 
14      """ 
15      if mimetype.startswith("image/"): 
16          return True 
17      else: 
18          return False 
19   
20 -class Photo(File.File): 
21      """ 
22      A Small wrapper around a Pixbuf 
23      """ 
24   
25      _name_ = "file/photo" 
26   
27 -    def __init__(self, URI, **kwargs): 
28          File.File.__init__(self, URI, **kwargs) 
29          self.pb = None 
30          self._caption = None 
31   
32 -    def get_photo_pixbuf(self): 
33          """ 
34          Defer actually getting the pixbuf till as 
35          late as possible, as it is really only needed for 
36          conversion 
37          """ 
38          import gtk.gdk 
39          if self.pb == None: 
40              self.pb = gtk.gdk.pixbuf_new_from_file(self.get_local_uri()) 
41          return self.pb 
42   
43 -    def get_photo_size(self): 
44          """ 
45          Returns the pb size, width, height 
46          """ 
47          self.get_photo_pixbuf() 
48          return self.pb.get_width(),self.pb.get_height() 
49   
50 -    def get_caption(self): 
51          """ 
52          @returns: the photo's caption 
53          """ 
54          return self._caption 
55   
56 -    def set_caption(self, caption): 
57          self._caption = caption 
58   
59 -    def get_hash(self): 
60          # Combine the file hash with other photo metadata. 
61          file_hash = File.File.get_hash(self)        
62          hash_data = "%s%s%s" % (file_hash, self.get_photo_size(), 
63                  self.get_caption()) 
64          return hash(hash_data) 
65           
66 -    def __getstate__(self): 
67          data = File.File.__getstate__(self) 
68          data["caption"] = self._caption 
69          return data 
70   
71 -    def __setstate__(self, data): 
72          self.pb = None 
73          self._caption = data["caption"] 
74          File.File.__setstate__(self, data) 
75