cleaned up to reduce duplicated code

IPython/lib/display.py

@@ -1,220 +1,215 b''
 """Various display related classes.
 
 Authors : MinRK, gregcaporaso
 """
 
 from os.path import exists, isfile, splitext, abspath, join, isdir, walk
 
 
 class YouTubeVideo(object):
     """Class for embedding a YouTube Video in an IPython session, based on its video id.
 
     e.g. to embed the video on this page:
 
     http://www.youtube.com/watch?v=foo
 
     you would do:
 
     vid = YouTubeVideo("foo")
     display(vid)
     """
 
     def __init__(self, id, width=400, height=300):
         self.id = id
         self.width = width
         self.height = height
 
     def _repr_html_(self):
         """return YouTube embed iframe for this video id"""
         return """
             <iframe
                 width="%i"
                 height="%i"
                 src="http://www.youtube.com/embed/%s"
                 frameborder="0"
                 allowfullscreen
             ></iframe>
         """%(self.width, self.height, self.id)
 
 class FileLink(object):
     """Class for embedding a local file link in an IPython session, based on path
 
     e.g. to embed a link that was generated in the IPython notebook as my/data.txt
 
     you would do:
 
     local_file = FileLink("my/data.txt")
     display(local_file)
     
     or in the HTML notebook, just
     
     FileLink("my/data.txt")
     """
     
     html_link_str = "<a href='%s' target='_blank'>%s</a>"
     
     def __init__(self,
                  path,
                  url_prefix='files/',
                  result_html_prefix='',
                  result_html_suffix='<br>'):
         """
             path : path to the file or directory that should be formatted
             directory_prefix : prefix to be prepended to all files to form a
              working link [default: 'files']
             result_html_prefix : text to append to beginning to link
              [default: none]
             result_html_suffix : text to append at the end of link
              [default: '<br>']
         """
         self.path = path
         self.url_prefix = url_prefix
         self.result_html_prefix = result_html_prefix
         self.result_html_suffix = result_html_suffix
     
     def _format_path(self):
         fp = ''.join([self.url_prefix,self.path])
         return ''.join([self.result_html_prefix,
                         self.html_link_str % (fp, self.path),
                         self.result_html_suffix])
         
     def _repr_html_(self):
         """return html link to file
         """
         if not exists(self.path):
             return ("Path (<tt>%s</tt>) doesn't exist. " 
                     "It may still be in the process of "
                     "being generated, or you may have the "
                     "incorrect path." % self.path)
         
         return self._format_path()
     
     def __repr__(self):
         """return absolute path to file
         """
         return abspath(self.path)
         
 # Create an alias for formatting a single directory name as a link.
 # Right now this is the same as a formatting for a single file, but 
 # we'll encourage users to reference these with a different class in
 # case we want to change this in the future.
 DirectoryLink = FileLink
 
 class FileLinks(FileLink):
     """Class for embedding local file links in an IPython session, based on path
 
     e.g. to embed links to files that were generated in the IPython notebook under my/data
 
     you would do:
 
     local_files = FileLinks("my/data")
     display(local_files)
     
     or in the HTML notebook, just
     
     FileLinks("my/data")
     
     """
     def __init__(self,
                  path,
                  url_prefix='files/',
                  included_suffixes=None,
                  result_html_prefix='',
                  result_html_suffix='<br>',
                  notebook_display_formatter=None,
                  terminal_display_formatter=None):
         """
             included_suffixes : list of filename suffixes to include when
              formatting output [default: include all files]
              
             See the FileLink (baseclass of LocalDirectory) docstring for 
              information on additional parameters.
         """
         self.included_suffixes = included_suffixes
         
-        self.notebook_display_formatter = \
-         self._get_notebook_display_formatter(url_prefix,
-                                              result_html_prefix,
-                                              result_html_suffix,
-                                              included_suffixes)
-        self.terminal_display_formatter = \
-         self._get_terminal_display_formatter(url_prefix,
-                                              result_html_prefix,
-                                              result_html_suffix,
-                                              included_suffixes)
         FileLink.__init__(self,
                            path,
                            url_prefix,
                            result_html_prefix,
                            result_html_suffix)
+        
+        self.notebook_display_formatter = \
+         self._get_notebook_display_formatter()
+        self.terminal_display_formatter = \
+         self._get_terminal_display_formatter()
     
-    def _get_notebook_display_formatter(self,
-                                        url_prefix,
-                                        result_html_prefix,
-                                        result_html_suffix,
-                                        included_suffixes):
-        """ """
+    def _get_display_formatter(self,
+                               dirname_output_format,
+                               fname_output_format,
+                               fp_format):
+        
+        included_suffixes = self.included_suffixes
+
         def f(output_lines, dirname, fnames):
             """  """
             # begin by figuring out which filenames, if any, 
             # are going to be displayed
             display_fnames = []
             for fname in fnames:
                 if (isfile(join(dirname,fname)) and
                        (included_suffixes == None or
                         splitext(fname)[1] in included_suffixes)):
                       display_fnames.append(fname)
-            
+        
             if len(display_fnames) == 0:
                 pass
             else:
-                output_lines.append(''.join([result_html_prefix,
-                                             dirname,
-                                             result_html_suffix]))
+                dirname_output_line = dirname_output_format % dirname
+                output_lines.append(dirname_output_line)
                 for fname in display_fnames:
-                    fp = ''.join([self.url_prefix,dirname,'/',fname])
-                    output_lines.append(''.join([self.result_html_prefix,
-                                                   '&nbsp;&nbsp;',
-                                                   self.html_link_str % (fp,fname),
-                                                   self.result_html_suffix]))
+                    fp = fp_format % (dirname,fname)
+                    try:
+                        # output can include both a filepath and a filename...
+                        fname_output_line = fname_output_format % (fp, fname)
+                    except TypeError:
+                        # ... or just a single filepath
+                        fname_output_line = fname_output_format % fname
+                    output_lines.append(fname_output_line)
             return
         return f
 
-    def _get_terminal_display_formatter(self,
-                                        url_prefix,
-                                        result_html_prefix,
-                                        result_html_suffix,
-                                        included_suffixes):
+    def _get_notebook_display_formatter(self,
+                                        spacer="&nbsp;&nbsp;"):
         """ """
-        def f(output_lines, dirname, fnames):
-            """  """
-            # begin by figuring out which filenames, if any, 
-            # are going to be displayed
-            display_fnames = []
-            for fname in fnames:
-                if (isfile(join(dirname,fname)) and
-                       (included_suffixes == None or
-                        splitext(fname)[1] in included_suffixes)):
-                      display_fnames.append(fname)
+        dirname_output_format = \
+         self.result_html_prefix + "%s" + self.result_html_suffix
+        fname_output_format = \
+         self.result_html_prefix + spacer + self.html_link_str + self.result_html_suffix
+        fp_format = self.url_prefix + '%s/%s'
+        
+        return self._get_display_formatter(dirname_output_format,
+                                           fname_output_format,
+                                           fp_format)
 
-            if len(display_fnames) == 0:
-                pass
-            else:
-                output_lines.append(dirname)
-                for fname in display_fnames:
-                    fp = abspath(join(dirname,fname))
-                    output_lines.append('  %s' % fp)
-            return
-        return f
+    def _get_terminal_display_formatter(self,
+                                        spacer="  "):
+        """ """
+        dirname_output_format = "%s"
+        fname_output_format = spacer + "%s"
+        fp_format = '%s/%s'
+        
+        return self._get_display_formatter(dirname_output_format,
+                                           fname_output_format,
+                                           fp_format)
     
     def _format_path(self):
         result_lines = []
         walk(self.path, self.notebook_display_formatter, result_lines)
         return '\n'.join(result_lines)
     
     def __repr__(self):
         """return newline-separated absolute paths
         """
         result_lines = []
         walk(self.path, self.terminal_display_formatter, result_lines)
         return '\n'.join(result_lines)
  No newline at end of file