Change _BrowserLevel.moveto() so that the call to fetch() always tries to

fetch enough data for at least one full screen. This makes it possible to
simply call moveto(0,0,True) in the constructor. Fix typos and removed
the obsolete goto attribute.

IPython/Extensions/ibrowse.py

@@ -237,13 +237,8 b' class _BrowserLevel(object):'
         # Maps attribute names to column widths
         self.colwidths = {}
 
-        self.fetch(mainsizey)
-        self.calcdisplayattrs()
-        # formatted attributes for the items on screen
-        # (i.e. self.items[self.datastarty:self.datastarty+self.mainsizey])
-        self.displayrows = [self.getrow(i) for i in xrange(len(self.items))]
-        self.calcwidths()
-        self.calcdisplayattr()
+        # This takes care of all the caches etc.
+        self.moveto(0, 0, refresh=True)
 
     def fetch(self, count):
         # Try to fill ``self.items`` with at least ``count`` objects.
@@ -296,11 +291,11 b' class _BrowserLevel(object):'
         return row
 
     def calcwidths(self):
-        # Recalculate the displayed fields and their width.
+        # Recalculate the displayed fields and their widths.
         # ``calcdisplayattrs()'' must have been called and the cache
         # for attributes of the objects on screen (``self.displayrows``)
         # must have been filled. This returns a dictionary mapping
-        # colmn names to width.
+        # column names to widths.
         self.colwidths = {}
         for row in self.displayrows:
             for attrname in self.displayattrs:
@@ -314,7 +309,7 b' class _BrowserLevel(object):'
                 newwidth = max(self.colwidths[attrname], length)
                 self.colwidths[attrname] = newwidth
 
-        # How many characters do we need to paint the item number?
+        # How many characters do we need to paint the largest item number?
         self.numbersizex = len(str(self.datastarty+self.mainsizey-1))
         # How must space have we got to display data?
         self.mainsizex = self.browser.scrsizex-self.numbersizex-3
@@ -322,7 +317,7 b' class _BrowserLevel(object):'
         self.datasizex = sum(self.colwidths.itervalues()) + len(self.colwidths)
 
     def calcdisplayattr(self):
-        # Find out on which attribute the cursor is on and store this
+        # Find out which attribute the cursor is on and store this
         # information in ``self.displayattr``.
         pos = 0
         for (i, attrname) in enumerate(self.displayattrs):
@@ -352,7 +347,8 b' class _BrowserLevel(object):'
         # Make sure that the cursor didn't leave the main area vertically
         if y < 0:
             y = 0
-        self.fetch(y+scrollbordery+1) # try to get more items
+        # try to get enough items to fill the screen
+        self.fetch(max(y+scrollbordery+1, self.mainsizey))
         if y >= len(self.items):
             y = max(0, len(self.items)-1)
 
@@ -807,9 +803,6 b' class ibrowse(ipipe.Display):'
         # e.g. normal browsing or entering an argument for a command
         self.mode = "default"
 
-        # The partially entered row number for the goto command
-        self.goto = ""
-
     def nextstepx(self, step):
         """
         Accelerate horizontally.
@@ -1469,7 +1462,7 b' class ibrowse(ipipe.Display):'
                     else:
                         scr.move(self.scrsizey-1, 0)
             except curses.error:
-                # Protect against error from writing to the last line
+                # Protect against errors from writing to the last line
                 pass
             scr.clrtoeol()
 

doc/ChangeLog

@@ -1,3 +1,10 b''
[phone]  Walter Doerwald  <[e-mail]>
+
+	* IPython/Extensions/ibrowse.py: Change _BrowserLevel.moveto() so that
+	the call to fetch() always tries to fetch enough data for at least one
+	full screen. This makes it possible to simply call moveto(0,0,True) in
+	the constructor. Fix typos and removed the obsolete goto attribute.
+
 2006-06-12  Ville Vainio  <[e-mail]>
 
 	* ipy_profile_sh.py: applied Krisha Mohan Gundu's patch for