Merge branch 'opds-stats'

[wolnelektury.git] / lib / markupstring.py

diff --git a/lib/markupstring.py b/lib/markupstring.py
index f31e148..0e273f2 100644 (file)
--- a/lib/markupstring.py
+++ b/lib/markupstring.py
@@ -5,50 +5,50 @@
 import xml.sax
 
 
-class simpleHandler (xml.sax.ContentHandler):
+class simpleHandler(xml.sax.ContentHandler):
     """A simple handler that provides us with indices of marked up content."""
-    def __init__ (self):        
+    def __init__(self):
         self.elements = [] #this will contain a list of elements and their start/end indices
         self.open_elements = [] #this holds info on open elements while we wait for their close
         self.content = ""
 
-    def startElement (self,name,attrs):
-        if name=='foobar': return # we require an outer wrapper, which we promptly ignore.
+    def startElement(self, name, attrs):
+        if name == 'foobar': return # we require an outer wrapper, which we promptly ignore.
         self.open_elements.append({'name':name,
                                    'attrs':attrs.copy(),
                                    'start':len(self.content),
                                    })
 
-    def endElement (self, name):
-        if name=='foobar': return # we require an outer wrapper, which we promptly ignore.
+    def endElement(self, name):
+        if name == 'foobar': return # we require an outer wrapper, which we promptly ignore.
         for i in range(len(self.open_elements)):
             e = self.open_elements[i]
-            if e['name']==name:
+            if e['name'] == name:
                 # append a  (start,end), name, attrs
                 self.elements.append(((e['start'], #start position
-                                       len(self.content)),# current (end) position
-                                      e['name'],e['attrs'])
+                                       len(self.content)), # current (end) position
+                                      e['name'], e['attrs'])
                                      )
                 del self.open_elements[i]
                 return
 
-    def characters (self, chunk):
+    def characters(self, chunk):
         self.content += chunk
 
 
-class MarkupString (unicode):
+class MarkupString(unicode):
     """A simple class for dealing with marked up strings. When we are sliced, we return
     valid marked up strings, preserving markup."""
-    def __init__ (self, string):        
-        unicode.__init__(self, string)
+    def __init__(self, string):
+        unicode.__init__(self)
         self.handler = simpleHandler()
         xml.sax.parseString((u"<foobar>%s</foobar>" % string).encode('utf-8'), self.handler)
         self.raw = self.handler.content
 
-    def __getitem__ (self, n):
-        return self.__getslice__(n,n+1)
+    def __getitem__(self, n):
+        return self.__getslice__(n, n + 1)
 
-    def __getslice__ (self, s, e):
+    def __getslice__(self, s, e):
         # only include relevant elements
         if not e or e > len(self.raw): e = len(self.raw)
         elements = filter(lambda tp: (tp[0][1] >= s and # end after the start...
@@ -64,21 +64,21 @@ class MarkupString (unicode):
             name = el[1]
             attrs = el[2]
             # write our start tag <stag att="val"...>
-            stag = "<%s"%name
-            for k,v in attrs.items(): stag += " %s=%s"%(k,xml.sax.saxutils.quoteattr(v))
+            stag = "<%s" % name
+            for k, v in attrs.items(): stag += " %s=%s" % (k, xml.sax.saxutils.quoteattr(v))
             stag += ">"
-            etag = "</%s>"%name # simple end tag
+            etag = "</%s>" % name # simple end tag
             spos = pos[0]
             epos = pos[1]
-            if spos < s: spos=s
-            if epos > e: epos=e
+            if spos < s: spos = s
+            if epos > e: epos = e
             if epos != spos: # we don't care about tags that don't markup any text
-                if not starts.has_key(spos): starts[spos]=[]
+                if not starts.has_key(spos): starts[spos] = []
                 starts[spos].append(stag)
-                if not ends.has_key(epos): ends[epos]=[]
+                if not ends.has_key(epos): ends[epos] = []
                 ends[epos].append(etag)
         outbuf = "" # our actual output string
-        for pos in range(s,e): # we move through positions
+        for pos in range(s, e): # we move through positions
             char = self.raw[pos]
             if ends.has_key(pos):  # if there are endtags to insert...
                 for et in ends[pos]: outbuf += et
@@ -89,6 +89,9 @@ class MarkupString (unicode):
                 for st in mystarts: outbuf += st
             outbuf += char
         if ends.has_key(e):
-            for et in ends[e]: outbuf+= et
+            for et in ends[e]: outbuf += et
         return MarkupString(outbuf)
 
+    def __len__(self):
+        return len(self.raw)
+