fix unit handling of all python extensions. did not test with all extensions

(bzr r12722)

23 files changed, 100 insertions, 92 deletions

diff --git a/share/extensions/dots.py b/share/extensions/dots.py
index 7b88dd1b1..33ead21e7 100755
--- a/share/extensions/dots.py
+++ b/share/extensions/dots.py
@@ -69,8 +69,8 @@ class Dots(inkex.Effect):
                 y = dy/dist
                 if x1 > x2: x *= -1
                 if y1 > y2: y *= -1
-                p[lastDot][1][-2] += x * inkex.unittouu(self.options.dotsize)
-                p[lastDot][1][-1] += y * inkex.unittouu(self.options.dotsize)
+                p[lastDot][1][-2] += x * self.unittouu(self.options.dotsize)
+                p[lastDot][1][-1] += y * self.unittouu(self.options.dotsize)
 
     def addDot(self, node):
         self.group = inkex.etree.SubElement( node.getparent(), inkex.addNS('g','svg') )
@@ -94,7 +94,7 @@ class Dots(inkex.Effect):
             if cmd != 'Z' and cmd != 'z':
                 dot_att = {
                   'style': style,
-                  'r':  str( inkex.unittouu(self.options.dotsize) / 2 ),
+                  'r':  str( self.unittouu(self.options.dotsize) / 2 ),
                   'cx': str( params[-2] ),
                   'cy': str( params[-1] )
                 }
@@ -104,8 +104,8 @@ class Dots(inkex.Effect):
                   dot_att )
                 self.addText(
                   self.numGroup,
-                  params[-2] + ( inkex.unittouu(self.options.dotsize) / 2 ),
-                  params[-1] - ( inkex.unittouu(self.options.dotsize) / 2 ),
+                  params[-2] + ( self.unittouu(self.options.dotsize) / 2 ),
+                  params[-1] - ( self.unittouu(self.options.dotsize) / 2 ),
                   num )
                 num += self.options.step
         node.getparent().remove( node )
diff --git a/share/extensions/dxf_outlines.py b/share/extensions/dxf_outlines.py
index c5217f886..f5cf37aff 100755
--- a/share/extensions/dxf_outlines.py
+++ b/share/extensions/dxf_outlines.py
@@ -325,7 +325,7 @@ class MyEffect(inkex.Effect):
         scale = eval(self.options.units)
         if not scale:
             scale = 25.4/90     # if no scale is specified, assume inch as baseunit
-        h = inkex.unittouu(self.document.getroot().xpath('@height', namespaces=inkex.NSS)[0])
+        h = self.unittouu(self.document.getroot().xpath('@height', namespaces=inkex.NSS)[0])
         self.groupmat = [[[scale, 0.0, 0.0], [0.0, -scale, h*scale]]]
         doc = self.document.getroot()
         self.process_group(doc)
diff --git a/share/extensions/eqtexsvg.py b/share/extensions/eqtexsvg.py
index a6000dc6d..99d3c0660 100755
--- a/share/extensions/eqtexsvg.py
+++ b/share/extensions/eqtexsvg.py
@@ -55,8 +55,8 @@ def create_equation_tex(filename, equation, add_header=""):
     tex.close()
 
 def svg_open(self,filename):
-    doc_width = inkex.unittouu(self.document.getroot().get('width'))
-    doc_height = inkex.unittouu(self.document.getroot().get('height'))
+    doc_width = self.unittouu(self.document.getroot().get('width'))
+    doc_height = self.unittouu(self.document.getroot().get('height'))
     doc_sizeH = min(doc_width,doc_height)
     doc_sizeW = max(doc_width,doc_height)
 
diff --git a/share/extensions/foldablebox.py b/share/extensions/foldablebox.py
index 21de10565..5d5945dd9 100755
--- a/share/extensions/foldablebox.py
+++ b/share/extensions/foldablebox.py
@@ -58,12 +58,12 @@ class FoldableBox(inkex.Effect):
 
     def effect(self):
 
-        docW = inkex.unittouu(self.document.getroot().get('width'))
-        docH = inkex.unittouu(self.document.getroot().get('height'))
+        docW = self.unittouu(self.document.getroot().get('width'))
+        docH = self.unittouu(self.document.getroot().get('height'))
 
-        boxW = inkex.unittouu( str(self.options.width)  + self.options.unit )
-        boxH = inkex.unittouu( str(self.options.height) + self.options.unit )
-        boxD = inkex.unittouu( str(self.options.depth)  + self.options.unit )
+        boxW = self.unittouu( str(self.options.width)  + self.options.unit )
+        boxH = self.unittouu( str(self.options.height) + self.options.unit )
+        boxD = self.unittouu( str(self.options.depth)  + self.options.unit )
         tabProp = self.options.tabProportion
         tabH = boxD * tabProp
 
diff --git a/share/extensions/gcodetools.py b/share/extensions/gcodetools.py
index ff0454db0..b9e6348f2 100755
--- a/share/extensions/gcodetools.py
+++ b/share/extensions/gcodetools.py
@@ -5852,7 +5852,7 @@ class Gcodetools(inkex.Effect):
 				attr["transform"] = transform 
 
 			orientation_group = inkex.etree.SubElement(layer, inkex.addNS('g','svg'), attr)
-			doc_height = inkex.unittouu(self.document.getroot().get('height'))
+			doc_height = self.unittouu(self.document.getroot().get('height'))
 			if self.document.getroot().get('height') == "100%" :
 				doc_height = 1052.3622047
 				print_("Overruding height from 100 percents to %s" % doc_height)
diff --git a/share/extensions/gimp_xcf.py b/share/extensions/gimp_xcf.py
index fe657d999..35d0bbd4c 100755
--- a/share/extensions/gimp_xcf.py
+++ b/share/extensions/gimp_xcf.py
@@ -74,8 +74,8 @@ class MyEffect(inkex.Effect):
         docname = ttmp_orig.get(inkex.addNS('docname',u'sodipodi'))
         if docname is None: docname = self.args[-1]
 
-        pageHeight = int(inkex.unittouu(self.xpathSingle('/svg:svg/@height').split('.')[0]))
-        pageWidth = int(inkex.unittouu(self.xpathSingle('/svg:svg/@width').split('.')[0]))
+        pageHeight = int(self.unittouu(self.xpathSingle('/svg:svg/@height').split('.')[0]))
+        pageWidth = int(self.unittouu(self.xpathSingle('/svg:svg/@width').split('.')[0]))
 
         # Create os temp dir (to store exported pngs and Gimp log file)
         self.tmp_dir = tempfile.mkdtemp()
diff --git a/share/extensions/guides_creator.py b/share/extensions/guides_creator.py
index 178dc3c95..abd41c6fc 100755
--- a/share/extensions/guides_creator.py
+++ b/share/extensions/guides_creator.py
@@ -297,8 +297,8 @@ class Guides_Creator(inkex.Effect):
                 svg = self.document.getroot()
 
                 # getting the width and height attributes of the canvas
-                width  = inkex.unittouu(svg.get('width'))
-                height = inkex.unittouu(svg.attrib['height'])
+                width  = self.unittouu(svg.get('width'))
+                height = self.unittouu(svg.attrib['height'])
 
                 # getting edges coordinates
                 h_orientation = '0,' + str(round(width,4))
diff --git a/share/extensions/guillotine.py b/share/extensions/guillotine.py
index 82b1a5441..bd077d60a 100755
--- a/share/extensions/guillotine.py
+++ b/share/extensions/guillotine.py
@@ -128,7 +128,7 @@ class Guillotine(inkex.Effect):
         '''
         root = self.document.getroot()
         horizontals = ['0']
-        height = inkex.unittouu(root.attrib['height'])
+        height = self.unittouu(root.attrib['height'])
         for h in self.get_all_horizontal_guides():
             if h >= 0 and float(h) <= float(height):
                 horizontals.append(h)
@@ -144,7 +144,7 @@ class Guillotine(inkex.Effect):
         '''
         root = self.document.getroot()
         verticals = ['0']
-        width = inkex.unittouu(root.attrib['width'])
+        width = self.unittouu(root.attrib['width'])
         for v in self.get_all_vertical_guides():
             if v >= 0 and float(v) <= float(width):
                 verticals.append(v)
diff --git a/share/extensions/hpgl_output.py b/share/extensions/hpgl_output.py
index 83d6da5af..eb3d6ffe3 100755
--- a/share/extensions/hpgl_output.py
+++ b/share/extensions/hpgl_output.py
@@ -115,8 +115,8 @@ class MyEffect(inkex.Effect):
         if viewBox:
             viewBox = string.split(viewBox, ' ')
             if viewBox[2] and viewBox[3]:
-                viewBoxTransformX = float(inkex.unittouu(doc.get('width'))) / float(viewBox[2])
-                viewBoxTransformY = float(inkex.unittouu(doc.get('height'))) / float(viewBox[3])
+                viewBoxTransformX = float(self.unittouu(doc.get('width'))) / float(viewBox[2])
+                viewBoxTransformY = float(self.unittouu(doc.get('height'))) / float(viewBox[3])
         # dryRun to find edges
         self.dryRun = True
         self.groupmat = [[[scale*viewBoxTransformX, 0.0, 0.0], [0.0, mirror*scale*viewBoxTransformY, 0.0]]]
diff --git a/share/extensions/ink2canvas.py b/share/extensions/ink2canvas.py
index 7d2ee6a7f..51b75d846 100755
--- a/share/extensions/ink2canvas.py
+++ b/share/extensions/ink2canvas.py
@@ -78,8 +78,8 @@ class Ink2Canvas(inkex.Effect):
     def effect(self):
         """Applies the effect"""
         svg_root = self.document.getroot()
-        width = inkex.unittouu(svg_root.get("width"))
-        height = inkex.unittouu(svg_root.get("height"))
+        width = self.unittouu(svg_root.get("width"))
+        height = self.unittouu(svg_root.get("height"))
         self.canvas = Canvas(width, height)
         self.walk_tree(svg_root)
 
diff --git a/share/extensions/inkex.py b/share/extensions/inkex.py
index 861cc2300..fd70d1c7d 100755
--- a/share/extensions/inkex.py
+++ b/share/extensions/inkex.py
@@ -78,30 +78,6 @@ def localize():
     #sys.stderr.write(str(localdir) + "\n")
     trans.install()
 
-#a dictionary of unit to user unit conversion factors
-uuconv = {'in':90.0, 'pt':1.25, 'px':1, 'mm':3.5433070866, 'cm':35.433070866, 'm':3543.3070866,
-          'km':3543307.0866, 'pc':15.0, 'yd':3240 , 'ft':1080}
-def unittouu(string):
-    '''Returns userunits given a string representation of units in another system'''
-    unit = re.compile('(%s)$' % '|'.join(uuconv.keys()))
-    param = re.compile(r'(([-+]?[0-9]+(\.[0-9]*)?|[-+]?\.[0-9]+)([eE][-+]?[0-9]+)?)')
-
-    p = param.match(string)
-    u = unit.search(string)    
-    if p:
-        retval = float(p.string[p.start():p.end()])
-    else:
-        retval = 0.0
-    if u:
-        try:
-            return retval * uuconv[u.string[u.start():u.end()]]
-        except KeyError:
-            pass
-    return retval
-
-def uutounit(val, unit):
-    return val/uuconv[unit]
-
 def debug(what):
     sys.stderr.write(str(what) + "\n")
     return what
@@ -189,6 +165,7 @@ class Effect:
         self.original_document = copy.deepcopy(self.document)
         stream.close()
 
+    # defines view_center in terms of document units
     def getposinlayer(self):
         #defaults
         self.current_layer = self.document.getroot()
@@ -203,10 +180,10 @@ class Effect:
 
         xattr = self.document.xpath('//sodipodi:namedview/@inkscape:cx', namespaces=NSS)
         yattr = self.document.xpath('//sodipodi:namedview/@inkscape:cy', namespaces=NSS)
-        doc_height = unittouu(self.document.getroot().get('height'))
         if xattr and yattr:
-            x = xattr[0]
-            y = yattr[0]
+            x = self.unittouu( xattr[0] + 'px' )
+            y = self.unittouu( yattr[0] + 'px')
+            doc_height = self.unittouu(self.document.getroot().get('height'))
             if x and y:
                 self.view_center = (float(x), doc_height - float(y)) # FIXME: y-coordinate flip, eliminate it when it's gone in Inkscape
 
@@ -283,6 +260,37 @@ class Effect:
             errormsg(_("No matching node for expression: %s") % path)
             retval = None
         return retval
-            
+
+    def getDocumentUnit(self):
+        docunit = self.document.xpath('//sodipodi:namedview/@inkscape:document-units', namespaces=NSS)
+        if docunit:
+            return docunit[0]
+        else:
+            return 'px'
+
+    #a dictionary of unit to user unit conversion factors
+    uuconv = {'in':90.0, 'pt':1.25, 'px':1, 'mm':3.5433070866, 'cm':35.433070866, 'm':3543.3070866,
+              'km':3543307.0866, 'pc':15.0, 'yd':3240 , 'ft':1080}
+    def unittouu(self, string):
+        '''Returns userunits given a string representation of units in another system'''
+        unit = re.compile('(%s)$' % '|'.join(self.uuconv.keys()))
+        param = re.compile(r'(([-+]?[0-9]+(\.[0-9]*)?|[-+]?\.[0-9]+)([eE][-+]?[0-9]+)?)')
+
+        p = param.match(string)
+        u = unit.search(string)    
+        if p:
+            retval = float(p.string[p.start():p.end()])
+        else:
+            retval = 0.0
+        if u:
+            try:
+                return retval * (self.uuconv[u.string[u.start():u.end()]] / self.uuconv[self.getDocumentUnit()])
+            except KeyError:
+                pass
+        return retval
+
+    def uutounit(self, val, unit):
+        return val / (self.uuconv[unit] / self.uuconv[self.getDocumentUnit()])
+
 
 # vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99
diff --git a/share/extensions/interp.py b/share/extensions/interp.py
index 9e10f30d8..c69dd4a73 100755
--- a/share/extensions/interp.py
+++ b/share/extensions/interp.py
@@ -61,8 +61,8 @@ def tweenstylefloat(property, start, end, time):
     ep = float(end[property])
     return str(sp + (time * (ep - sp)))
 def tweenstyleunit(property, start, end, time):
-    sp = inkex.unittouu(start[property])
-    ep = inkex.unittouu(end[property])
+    sp = self.unittouu(start[property])
+    ep = self.unittouu(end[property])
     return str(sp + (time * (ep - sp)))
 def tweenstylecolor(property, start, end, time):
     sr,sg,sb = parsecolor(start[property])
diff --git a/share/extensions/interp_att_g.py b/share/extensions/interp_att_g.py
index 8ceaf8e34..0798f7f58 100755
--- a/share/extensions/interp_att_g.py
+++ b/share/extensions/interp_att_g.py
@@ -103,8 +103,8 @@ class InterpAttG(inkex.Effect):
       sv = self.options.start_val
       ev = self.options.end_val
       if self.inte_att_type and self.inte_att_type != 'none':
-        sv = inkex.unittouu( sv + self.inte_att_type )
-        ev = inkex.unittouu( ev + self.inte_att_type )
+        sv = self.unittouu( sv + self.inte_att_type )
+        ev = self.unittouu( ev + self.inte_att_type )
       self.val_cur = self.val_ini = sv
       self.val_end = ev
       self.val_inc = ( ev - sv ) / float( self.tot_el - 1 )
diff --git a/share/extensions/layout_nup_pageframe.py b/share/extensions/layout_nup_pageframe.py
index 16b781470..59da1f4bb 100755
--- a/share/extensions/layout_nup_pageframe.py
+++ b/share/extensions/layout_nup_pageframe.py
@@ -32,7 +32,7 @@ def expandTuple(unit, x, length = 4):
     if len(x) != length:
         raise Exception("expandTuple: requires 2 or 4 item tuple")
     try:
-        return tuple(map(lambda ev: (inkex.unittouu(str(eval(str(ev)))+unit)), x))
+        return tuple(map(lambda ev: (self.unittouu(str(eval(str(ev)))+unit)), x))
     except:
         return None
 #@-node:tbrown.20070622103716.1:expandTuple
diff --git a/share/extensions/measure.py b/share/extensions/measure.py
index 8aa940ed2..68cce0334 100755
--- a/share/extensions/measure.py
+++ b/share/extensions/measure.py
@@ -154,7 +154,7 @@ class Length(inkex.Effect):
                 mat = simpletransform.composeParents(node, [[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]])
                 p = cubicsuperpath.parsePath(node.get('d'))
                 simpletransform.applyTransformToPath(mat, p)
-                factor = factor/inkex.unittouu('1'+self.options.unit)
+                factor = factor/self.unittouu('1'+self.options.unit)
                 if self.options.type == "length":
                     slengths, stotal = csplength(p)
                 else:
diff --git a/share/extensions/pixelsnap.py b/share/extensions/pixelsnap.py
index 95ae7f0dc..162822920 100755
--- a/share/extensions/pixelsnap.py
+++ b/share/extensions/pixelsnap.py
@@ -77,7 +77,6 @@ import simplestyle, simpletransform, simplepath
 
 try:
     import inkex
-    from inkex import unittouu
 except ImportError:
     raise ImportError("No module named inkex.\nPlease edit the file %s and see the section titled 'INKEX MODULE'" % __file__)
 
@@ -170,7 +169,7 @@ class PixelSnapEffect(inkex.Effect):
             
         stroke_width = 0
         if stroke and setval is None:
-            stroke_width = unittouu(style.get('stroke-width', '').strip())
+            stroke_width = self.unittouu(style.get('stroke-width', '').strip())
             
         if setval:
             style['stroke-width'] = str(setval)
@@ -436,10 +435,10 @@ class PixelSnapEffect(inkex.Effect):
         
         offset = self.elem_offset(elem, parent_transform) % 1
 
-        width = unittouu(elem.attrib['width'])
-        height = unittouu(elem.attrib['height'])
-        x = unittouu(elem.attrib['x'])
-        y = unittouu(elem.attrib['y'])
+        width = self.unittouu(elem.attrib['width'])
+        height = self.unittouu(elem.attrib['height'])
+        x = self.unittouu(elem.attrib['x'])
+        y = self.unittouu(elem.attrib['y'])
 
         width, height = transform_dimensions(transform, width, height)
         x, y = transform_point(transform, [x, y])
@@ -494,7 +493,7 @@ class PixelSnapEffect(inkex.Effect):
     def effect(self):
         svg = self.document.getroot()
         
-        self.document_offset = unittouu(svg.attrib['height']) % 1       # although SVG units are absolute, the elements are positioned relative to the top of the page, rather than zero
+        self.document_offset = self.unittouu(svg.attrib['height']) % 1       # although SVG units are absolute, the elements are positioned relative to the top of the page, rather than zero
 
         for id, elem in self.selected.iteritems():
             try:
diff --git a/share/extensions/print_win32_vector.py b/share/extensions/print_win32_vector.py
index e77b49826..ca166d25a 100644
--- a/share/extensions/print_win32_vector.py
+++ b/share/extensions/print_win32_vector.py
@@ -63,7 +63,7 @@ class MyEffect(inkex.Effect):
                 if style['stroke'] and style['stroke'] != 'none' and style['stroke'][0:3] != 'url':
                     rgb = simplestyle.parseColor(style['stroke'])
             if style.has_key('stroke-width'):
-                stroke = inkex.unittouu(style['stroke-width'])
+                stroke = self.unittouu(style['stroke-width'])
                 stroke = int(stroke*self.scale)
             if style.has_key('fill'):
                 if style['fill'] and style['fill'] != 'none' and style['fill'][0:3] != 'url':
diff --git a/share/extensions/printing_marks.py b/share/extensions/printing_marks.py
index 7d3ab02d1..5c6ac3a61 100755
--- a/share/extensions/printing_marks.py
+++ b/share/extensions/printing_marks.py
@@ -34,8 +34,6 @@ class Printing_Marks (inkex.Effect):
 
     # Default parameters
     stroke_width = 0.25
-    mark_size = inkex.unittouu('1cm')
-    min_mark_margin = inkex.unittouu('3mm')
 
     def __init__(self):
         inkex.Effect.__init__(self)
@@ -228,6 +226,8 @@ class Printing_Marks (inkex.Effect):
         self.area_h = max_y - min_y
 
     def effect(self):
+        self.mark_size = self.unittouu('1cm')
+        self.min_mark_margin = self.unittouu('3mm')
 
         if self.options.where_to_crop == 'selection' :
             self.get_selection_area()
@@ -235,8 +235,8 @@ class Printing_Marks (inkex.Effect):
             #exit(1)
         else :
             svg = self.document.getroot()
-            self.area_w  = inkex.unittouu(svg.get('width'))
-            self.area_h  = inkex.unittouu(svg.attrib['height'])
+            self.area_w  = self.unittouu(svg.get('width'))
+            self.area_h  = self.unittouu(svg.attrib['height'])
             self.area_x1 = 0
             self.area_y1 = 0
             self.area_x2 = self.area_w
@@ -245,16 +245,16 @@ class Printing_Marks (inkex.Effect):
         # Get SVG document dimensions
         # self.width must be replaced by self.area_x2. same to others.
         svg = self.document.getroot()
-        #self.width  = width  = inkex.unittouu(svg.get('width'))
-        #self.height = height = inkex.unittouu(svg.attrib['height'])
+        #self.width  = width  = self.unittouu(svg.get('width'))
+        #self.height = height = self.unittouu(svg.attrib['height'])
 
         # Convert parameters to user unit
-        offset = inkex.unittouu(str(self.options.crop_offset) + \
+        offset = self.unittouu(str(self.options.crop_offset) + \
                                 self.options.unit)
-        bt = inkex.unittouu(str(self.options.bleed_top)    + self.options.unit)
-        bb = inkex.unittouu(str(self.options.bleed_bottom) + self.options.unit)
-        bl = inkex.unittouu(str(self.options.bleed_left)   + self.options.unit)
-        br = inkex.unittouu(str(self.options.bleed_right)  + self.options.unit)
+        bt = self.unittouu(str(self.options.bleed_top)    + self.options.unit)
+        bb = self.unittouu(str(self.options.bleed_bottom) + self.options.unit)
+        bl = self.unittouu(str(self.options.bleed_left)   + self.options.unit)
+        br = self.unittouu(str(self.options.bleed_right)  + self.options.unit)
         # Bleed margin
         if bt < offset : bmt = 0
         else :           bmt = bt - offset
@@ -476,9 +476,9 @@ class Printing_Marks (inkex.Effect):
                 }
             txt = inkex.etree.SubElement(g_pag_info, 'text', txt_attribs)
             txt.text = 'Page size: ' +\
-                       str(round(inkex.uutounit(self.area_w,self.options.unit),2)) +\
+                       str(round(self.uutounit(self.area_w,self.options.unit),2)) +\
                        'x' +\
-                       str(round(inkex.uutounit(self.area_h,self.options.unit),2)) +\
+                       str(round(self.uutounit(self.area_h,self.options.unit),2)) +\
                        ' ' + self.options.unit
 
 
diff --git a/share/extensions/render_gears.py b/share/extensions/render_gears.py
index a1b3ee666..5201e553b 100644
--- a/share/extensions/render_gears.py
+++ b/share/extensions/render_gears.py
@@ -67,9 +67,9 @@ class Gears(inkex.Effect):
     def effect(self):
 
         teeth = self.options.teeth
-        pitch = inkex.unittouu( str(self.options.pitch) + self.options.unit)
+        pitch = self.unittouu( str(self.options.pitch) + self.options.unit)
         angle = self.options.angle  # Angle of tangent to tooth at circular pitch wrt radial line.
- 	centerdiameter = inkex.unittouu( str(self.options.centerdiameter) + self.options.unit)
+        centerdiameter = self.unittouu( str(self.options.centerdiameter) + self.options.unit)
 
         # print >>sys.stderr, "Teeth: %s\n"        % teeth
 
@@ -182,4 +182,5 @@ if __name__ == '__main__':
     e.affect()
 
 
+
 # vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99
diff --git a/share/extensions/split.py b/share/extensions/split.py
index 0cbc7b05b..18d4327fe 100755
--- a/share/extensions/split.py
+++ b/share/extensions/split.py
@@ -58,7 +58,7 @@ class Split(inkex.Effect):
                     fontsize = parseStyle(node.get("style"))["font-size"]
                 except:
                     fontsize = "12px"
-                fs = inkex.unittouu(fontsize)
+                fs = self.unittouu(fontsize)
                 
                 #selects the flowRegion's child (svg:rect) to get @X and @Y
                 id = node.get("id")
@@ -124,7 +124,7 @@ class Split(inkex.Effect):
                 fontsize = parseStyle(line.get("style"))["font-size"]
             except:
                 fontsize = "12px"
-            fs = inkex.unittouu(fontsize)
+            fs = self.unittouu(fontsize)
 
             #extract and returns a list of words
             words_list = "".join(plain_str(line)).split()
@@ -170,7 +170,7 @@ class Split(inkex.Effect):
                 fontsize = simplestyle.parseStyle(word.get("style"))["font-size"]
             except:
                 fontsize = "12px"
-            fs = inkex.unittouu(fontsize)
+            fs = self.unittouu(fontsize)
 
             #for each letter in element string
             for letter in word[0].text:
diff --git a/share/extensions/svgcalendar.py b/share/extensions/svgcalendar.py
index 23290bfe5..a4269f5d7 100755
--- a/share/extensions/svgcalendar.py
+++ b/share/extensions/svgcalendar.py
@@ -166,8 +166,8 @@ class SVGCalendar (inkex.Effect):
         else:
             calendar.setfirstweekday(0)
         # Convert string numbers with unit to user space float numbers
-        self.options.month_width  = inkex.unittouu( self.options.month_width )
-        self.options.month_margin = inkex.unittouu( self.options.month_margin )
+        self.options.month_width  = self.unittouu( self.options.month_width )
+        self.options.month_margin = self.unittouu( self.options.month_margin )
 
     # initial values
     month_x_pos = 0
@@ -176,8 +176,8 @@ class SVGCalendar (inkex.Effect):
 
     def calculate_size_and_positions(self):
         #month_margin month_width months_per_line auto_organize
-        self.doc_w = inkex.unittouu(self.document.getroot().get('width'))
-        self.doc_h = inkex.unittouu(self.document.getroot().get('height'))
+        self.doc_w = self.unittouu(self.document.getroot().get('width'))
+        self.doc_h = self.unittouu(self.document.getroot().get('height'))
         if self.options.show_weeknr:
             self.cols_before = 1
         else:
diff --git a/share/extensions/voronoi2svg.py b/share/extensions/voronoi2svg.py
index dd693f8bb..c5b8a511f 100755
--- a/share/extensions/voronoi2svg.py
+++ b/share/extensions/voronoi2svg.py
@@ -290,8 +290,8 @@ class Voronoi2svg(inkex.Effect):
       clipBox = ()
       if self.options.clipBox == 'Page':
         svg = self.document.getroot()
-        w = inkex.unittouu(svg.get('width'))
-        h = inkex.unittouu(svg.get('height'))
+        w = self.unittouu(svg.get('width'))
+        h = self.unittouu(svg.get('height'))
         clipBox = (0,w,0,h)
       else:
         clipBox = (2*gBbox[0]-gBbox[1],
diff --git a/share/extensions/webslicer_export.py b/share/extensions/webslicer_export.py
index 118dfbeee..c9ea761a7 100755
--- a/share/extensions/webslicer_export.py
+++ b/share/extensions/webslicer_export.py
@@ -303,8 +303,8 @@ class WebSlicer_Export(WebSlicer_Effect):
                 if len(el) == 5:
                     self.el_geo[el[0]] = { 'x':float(el[1]), 'y':float(el[2]),
                                            'w':float(el[3]), 'h':float(el[4]) }
-        doc_w = inkex.unittouu( self.document.getroot().get('width') )
-        doc_h = inkex.unittouu( self.document.getroot().get('height') )
+        doc_w = self.unittouu( self.document.getroot().get('width') )
+        doc_h = self.unittouu( self.document.getroot().get('height') )
         self.el_geo['webslicer-layer'] = { 'x':0, 'y':0, 'w':doc_w, 'h':doc_h }