Merge branch 'normalize'

EPUB/AZX3 Output: Use shorthand forms for margin, padding and
border CSS properties

Conversion: Fix a bug that could cause incorrect border values to be
used when cascading, shorthand border CSS is present.

src/calibre/ebooks/conversion/plugins/mobi_output.py

@@ -148,7 +148,6 @@ class MOBIOutput(OutputFormatPlugin):
                         self.oeb.manifest.remove(self.oeb.manifest.hrefs[x.href])
                         x.href = articles_[0].href
 
-
             for sec in sections:
                 articles[id(sec)] = []
                 for a in list(sec):
@@ -188,12 +187,10 @@ class MOBIOutput(OutputFormatPlugin):
         self.check_for_periodical()
 
         if create_kf8:
-            # Split on pagebreaks so that the resulting KF8 works better with
-            # calibre's viewer, which does not support CSS page breaks
+            # Split on pagebreaks so that the resulting KF8 is faster to load
             from calibre.ebooks.oeb.transforms.split import Split
             Split()(self.oeb, self.opts)
 
-
         kf8 = self.create_kf8(resources, for_joint=mobi_type=='both'
                 ) if create_kf8 else None
         if mobi_type == 'new':

src/calibre/ebooks/conversion/plugins/oeb_output.py

@@ -18,7 +18,6 @@ class OEBOutput(OutputFormatPlugin):
 
     recommendations = set([('pretty_print', True, OptionRecommendation.HIGH)])
 
-
     def convert(self, oeb_book, output_path, input_plugin, opts, log):
         from urllib import unquote
         from lxml import etree
@@ -26,7 +25,8 @@ class OEBOutput(OutputFormatPlugin):
         self.log, self.opts = log, opts
         if not os.path.exists(output_path):
             os.makedirs(output_path)
-        from calibre.ebooks.oeb.base import OPF_MIME, NCX_MIME, PAGE_MAP_MIME
+        from calibre.ebooks.oeb.base import OPF_MIME, NCX_MIME, PAGE_MAP_MIME, OEB_STYLES
+        from calibre.ebooks.oeb.normalize_css import condense_sheet
         with CurrentDir(output_path):
             results = oeb_book.to_opf2(page_map=True)
             for key in (OPF_MIME, NCX_MIME, PAGE_MAP_MIME):
@@ -54,6 +54,8 @@ class OEBOutput(OutputFormatPlugin):
                         f.write(raw)
 
             for item in oeb_book.manifest:
+                if item.media_type in OEB_STYLES and hasattr(item.data, 'cssText'):
+                    condense_sheet(item.data)
                 path = os.path.abspath(unquote(item.href))
                 dir = os.path.dirname(path)
                 if not os.path.exists(dir):

src/calibre/ebooks/mobi/writer8/main.py

@@ -22,6 +22,7 @@ from calibre.ebooks.mobi.utils import (create_text_record, to_base,
 from calibre.ebooks.compression.palmdoc import compress_doc
 from calibre.ebooks.oeb.base import (OEB_DOCS, OEB_STYLES, SVG_MIME, XPath,
         extract, XHTML, urlnormalize)
+from calibre.ebooks.oeb.normalize_css import condense_sheet
 from calibre.ebooks.oeb.parse_utils import barename
 from calibre.ebooks.mobi.writer8.skeleton import Chunker, aid_able_tags, to_href
 from calibre.ebooks.mobi.writer8.index import (NCXIndex, SkelIndex,
@@ -150,6 +151,8 @@ class KF8Writer(object):
 
         for item in self.oeb.manifest:
             if item.media_type in OEB_STYLES:
+                if hasattr(item.data, 'cssText'):
+                    condense_sheet(self.data(item))
                 data = self.data(item).cssText
                 sheets[item.href] = len(self.flows)
                 self.flows.append(force_unicode(data, 'utf-8'))

src/calibre/ebooks/oeb/normalize_css.py

@@ -0,0 +1,389 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__ = 'GPL v3'
+__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
+
+from future_builtins import zip
+from functools import wraps
+
+try:
+    from cssutils.css import PropertyValue
+except ImportError:
+    raise RuntimeError('You need cssutils >= 0.9.9 for calibre')
+from cssutils import profile as cssprofiles
+
+DEFAULTS = {'azimuth': 'center', 'background-attachment': 'scroll',  # {{{
+            'background-color': 'transparent', 'background-image': 'none',
+            'background-position': '0% 0%', 'background-repeat': 'repeat',
+            'border-bottom-color': 'currentColor', 'border-bottom-style': 'none',
+            'border-bottom-width': 'medium', 'border-collapse': 'separate',
+            'border-left-color': 'currentColor', 'border-left-style': 'none',
+            'border-left-width': 'medium', 'border-right-color': 'currentColor',
+            'border-right-style': 'none', 'border-right-width': 'medium',
+            'border-spacing': 0, 'border-top-color': 'currentColor',
+            'border-top-style': 'none', 'border-top-width': 'medium', 'bottom':
+            'auto', 'caption-side': 'top', 'clear': 'none', 'clip': 'auto',
+            'color': 'black', 'content': 'normal', 'counter-increment': 'none',
+            'counter-reset': 'none', 'cue-after': 'none', 'cue-before': 'none',
+            'cursor': 'auto', 'direction': 'ltr', 'display': 'inline',
+            'elevation': 'level', 'empty-cells': 'show', 'float': 'none',
+            'font-family': 'serif', 'font-size': 'medium', 'font-style':
+            'normal', 'font-variant': 'normal', 'font-weight': 'normal',
+            'height': 'auto', 'left': 'auto', 'letter-spacing': 'normal',
+            'line-height': 'normal', 'list-style-image': 'none',
+            'list-style-position': 'outside', 'list-style-type': 'disc',
+            'margin-bottom': 0, 'margin-left': 0, 'margin-right': 0,
+            'margin-top': 0, 'max-height': 'none', 'max-width': 'none',
+            'min-height': 0, 'min-width': 0, 'orphans': '2',
+            'outline-color': 'invert', 'outline-style': 'none',
+            'outline-width': 'medium', 'overflow': 'visible', 'padding-bottom':
+            0, 'padding-left': 0, 'padding-right': 0, 'padding-top': 0,
+            'page-break-after': 'auto', 'page-break-before': 'auto',
+            'page-break-inside': 'auto', 'pause-after': 0, 'pause-before':
+            0, 'pitch': 'medium', 'pitch-range': '50', 'play-during': 'auto',
+            'position': 'static', 'quotes': u"'“' '”' '‘' '’'", 'richness':
+            '50', 'right': 'auto', 'speak': 'normal', 'speak-header': 'once',
+            'speak-numeral': 'continuous', 'speak-punctuation': 'none',
+            'speech-rate': 'medium', 'stress': '50', 'table-layout': 'auto',
+            'text-align': 'auto', 'text-decoration': 'none', 'text-indent':
+            0, 'text-transform': 'none', 'top': 'auto', 'unicode-bidi':
+            'normal', 'vertical-align': 'baseline', 'visibility': 'visible',
+            'voice-family': 'default', 'volume': 'medium', 'white-space':
+            'normal', 'widows': '2', 'width': 'auto', 'word-spacing': 'normal',
+            'z-index': 'auto'}
+# }}}
+
+EDGES = ('top', 'right', 'bottom', 'left')
+BORDER_PROPS = ('color', 'style', 'width')
+
+def normalize_edge(name, cssvalue):
+    style = {}
+    if isinstance(cssvalue, PropertyValue):
+        primitives = [v.cssText for v in cssvalue]
+    else:
+        primitives = [cssvalue.cssText]
+    if len(primitives) == 1:
+        value, = primitives
+        values = (value, value, value, value)
+    elif len(primitives) == 2:
+        vert, horiz = primitives
+        values = (vert, horiz, vert, horiz)
+    elif len(primitives) == 3:
+        top, horiz, bottom = primitives
+        values = (top, horiz, bottom, horiz)
+    else:
+        values = primitives[:4]
+    if '-' in name:
+        l, _, r = name.partition('-')
+        for edge, value in zip(EDGES, values):
+            style['%s-%s-%s' % (l, edge, r)] = value
+    else:
+        for edge, value in zip(EDGES, values):
+            style['%s-%s' % (name, edge)] = value
+    return style
+
+
+def simple_normalizer(prefix, names, check_inherit=True):
+    composition = tuple('%s-%s' %(prefix, n) for n in names)
+    @wraps(normalize_simple_composition)
+    def wrapper(name, cssvalue):
+        return normalize_simple_composition(name, cssvalue, composition, check_inherit=check_inherit)
+    return wrapper
+
+
+def normalize_simple_composition(name, cssvalue, composition, check_inherit=True):
+    if check_inherit and cssvalue.cssText == 'inherit':
+        style = {k:'inherit' for k in composition}
+    else:
+        style = {k:DEFAULTS[k] for k in composition}
+        try:
+            primitives = [v.cssText for v in cssvalue]
+        except TypeError:
+            primitives = [cssvalue.cssText]
+        while primitives:
+            value = primitives.pop()
+            for key in composition:
+                if cssprofiles.validate(key, value):
+                    style[key] = value
+                    break
+    return style
+
+font_composition = ('font-style', 'font-variant', 'font-weight', 'font-size', 'line-height', 'font-family')
+
+def normalize_font(name, cssvalue):
+    # See https://developer.mozilla.org/en-US/docs/Web/CSS/font
+    composition = font_composition
+    val = cssvalue.cssText
+    if val == 'inherit':
+        return {k:'inherit' for k in composition}
+    if val in {'caption', 'icon', 'menu', 'message-box', 'small-caption', 'status-bar'}:
+        return {k:DEFAULTS[k] for k in composition}
+    try:
+        primitives = list(v.cssText for v in cssvalue)
+    except TypeError:
+        primitives = [cssvalue.cssText]
+    if len(primitives) < 2:
+        return {}  # Mandatory to define both font size and font family
+    style = {k:DEFAULTS[k] for k in composition}
+    style['font-family'] = primitives.pop()
+    if len(primitives) > 1 and cssprofiles.validate('line-height', primitives[-1]) and cssprofiles.validate('font-size', primitives[-2]):
+        style['line-height'], style['font-size'] = primitives.pop(), primitives.pop()
+    else:
+        val = primitives.pop()
+        if not cssprofiles.validate('font-size', val):
+            return {}
+        style['font-size'] = val
+    composition = composition[:3]
+    while primitives:
+        value = primitives.pop()
+        for key in composition:
+            if cssprofiles.validate(key, value):
+                style[key] = value
+                break
+    return style
+
+def normalize_border(name, cssvalue):
+    style = normalizers['border-' + EDGES[0]]('border-' + EDGES[0], cssvalue)
+    vals = style.copy()
+    for edge in EDGES[1:]:
+        style.update({k.replace(EDGES[0], edge):v for k, v in vals.iteritems()})
+    return style
+
+normalizers = {
+    'list-style': simple_normalizer('list-style', ('type', 'position', 'image')),
+    'font': normalize_font,
+    'border': normalize_border,
+}
+
+for x in ('margin', 'padding', 'border-style', 'border-width', 'border-color'):
+    normalizers[x] = normalize_edge
+
+for x in EDGES:
+    name = 'border-' + x
+    normalizers[name] = simple_normalizer(name, BORDER_PROPS, check_inherit=False)
+
+def condense_edge(vals):
+    edges = {x.name.rpartition('-')[-1]:x.value for x in vals}
+    if len(edges) != 4:
+        return
+    ce = {}
+    for (x, y) in [('left', 'right'), ('top', 'bottom')]:
+        if edges[x] == edges[y]:
+            ce[x] = edges[x]
+        else:
+            ce[x], ce[y] = edges[x], edges[y]
+    if len(ce) == 4:
+        return ' '.join(ce[x] for x in ('top', 'right', 'bottom', 'left'))
+    if len(ce) == 3:
+        if 'right' in ce:
+            return ' '.join(ce[x] for x in ('top', 'right', 'top', 'left'))
+        return ' '.join(ce[x] for x in ('top', 'left', 'bottom'))
+    if len(ce) == 2:
+        if ce['top'] == ce['left']:
+            return ce['top']
+        return ' '.join(ce[x] for x in ('top', 'left'))
+
+def simple_condenser(prefix, func):
+    @wraps(func)
+    def condense_simple(style, props):
+        cp = func(props)
+        if cp is not None:
+            for prop in props:
+                style.removeProperty(prop.name)
+            style.setProperty(prefix, cp)
+    return condense_simple
+
+def condense_border(style, props):
+    prop_map = {p.name:p for p in props}
+    edge_vals = []
+    for edge in EDGES:
+        name = 'border-%s' % edge
+        vals = []
+        for prop in BORDER_PROPS:
+            x = prop_map.get('%s-%s' % (name, prop), None)
+            if x is not None:
+                vals.append(x)
+        if len(vals) == 3:
+            for prop in vals:
+                style.removeProperty(prop.name)
+            style.setProperty(name, ' '.join(x.value for x in vals))
+            prop_map[name] = style.getProperty(name)
+        x = prop_map.get(name, None)
+        if x is not None:
+            edge_vals.append(x)
+    if len(edge_vals) == 4 and len({x.value for x in edge_vals}) == 1:
+        for prop in edge_vals:
+            style.removeProperty(prop.name)
+        style.setProperty('border', edge_vals[0].value)
+
+condensers = {'margin': simple_condenser('margin', condense_edge), 'padding': simple_condenser('padding', condense_edge), 'border': condense_border}
+
+
+def condense_rule(style):
+    expanded = {'margin-':[], 'padding-':[], 'border-':[]}
+    for prop in style.getProperties():
+        for x in expanded:
+            if prop.name and prop.name.startswith(x):
+                expanded[x].append(prop)
+                break
+    for prefix, vals in expanded.iteritems():
+        if len(vals) > 1 and {x.priority for x in vals} == {''}:
+            condensers[prefix[:-1]](style, vals)
+
+def condense_sheet(sheet):
+    for rule in sheet.cssRules:
+        if rule.type == rule.STYLE_RULE:
+            condense_rule(rule.style)
+
+def test_normalization():  # {{{
+    import unittest
+    from cssutils import parseStyle
+    from itertools import product
+
+    class TestNormalization(unittest.TestCase):
+        longMessage = True
+        maxDiff = None
+
+        def test_font_normalization(self):
+            def font_dict(expected):
+                ans = {k:DEFAULTS[k] for k in font_composition}
+                ans.update(expected)
+                return ans
+
+            for raw, expected in {
+                'some_font': {}, 'none': {}, 'inherit':{k:'inherit' for k in font_composition},
+                '1.2pt/1.4 A_Font': {'font-family':'A_Font', 'font-size':'1.2pt', 'line-height':'1.4'},
+                'bad font': {}, '10% serif': {'font-family':'serif', 'font-size':'10%'},
+                'bold italic large serif': {'font-family':'serif', 'font-weight':'bold', 'font-style':'italic', 'font-size':'large'},
+                'bold italic small-caps larger/normal serif':
+                {'font-family':'serif', 'font-weight':'bold', 'font-style':'italic', 'font-size':'larger',
+                 'line-height':'normal', 'font-variant':'small-caps'},
+            }.iteritems():
+                val = tuple(parseStyle('font: %s' % raw, validate=False))[0].cssValue
+                style = normalizers['font']('font', val)
+                if expected:
+                    self.assertDictEqual(font_dict(expected), style)
+                else:
+                    self.assertDictEqual(expected, style)
+
+        def test_border_normalization(self):
+            def border_edge_dict(expected, edge='right'):
+                ans = {'border-%s-%s' % (edge, x): DEFAULTS['border-%s-%s' % (edge, x)] for x in ('style', 'width', 'color')}
+                for x, v in expected.iteritems():
+                    ans['border-%s-%s' % (edge, x)] = v
+                return ans
+            def border_dict(expected):
+                ans = {}
+                for edge in EDGES:
+                    ans.update(border_edge_dict(expected, edge))
+                return ans
+            def border_val_dict(expected, val='color'):
+                ans = {'border-%s-%s' % (edge, val): DEFAULTS['border-%s-%s' % (edge, val)] for edge in EDGES}
+                for edge in EDGES:
+                    ans['border-%s-%s' % (edge, val)] = expected
+                return ans
+
+            for raw, expected in {
+                'solid 1px red': {'color':'red', 'width':'1px', 'style':'solid'},
+                '1px': {'width': '1px'}, '#aaa': {'color': '#aaa'},
+                '2em groove': {'width':'2em', 'style':'groove'},
+            }.iteritems():
+                for edge in EDGES:
+                    br = 'border-%s' % edge
+                    val = tuple(parseStyle('%s: %s' % (br, raw), validate=False))[0].cssValue
+                    self.assertDictEqual(border_edge_dict(expected, edge), normalizers[br](br, val))
+
+            for raw, expected in {
+                'solid 1px red': {'color':'red', 'width':'1px', 'style':'solid'},
+                '1px': {'width': '1px'}, '#aaa': {'color': '#aaa'},
+                'thin groove': {'width':'thin', 'style':'groove'},
+            }.iteritems():
+                val = tuple(parseStyle('%s: %s' % ('border', raw), validate=False))[0].cssValue
+                self.assertDictEqual(border_dict(expected), normalizers['border']('border', val))
+
+            for name, val in {
+                'width': '10%', 'color': 'rgb(0, 1, 1)', 'style': 'double',
+            }.iteritems():
+                cval = tuple(parseStyle('border-%s: %s' % (name, val), validate=False))[0].cssValue
+                self.assertDictEqual(border_val_dict(val, name), normalizers['border-'+name]('border-'+name, cval))
+
+        def test_edge_normalization(self):
+            def edge_dict(prefix, expected):
+                return {'%s-%s' % (prefix, edge) : x for edge, x in zip(EDGES, expected)}
+            for raw, expected in {
+                '2px': ('2px', '2px', '2px', '2px'),
+                '1em 2em': ('1em', '2em', '1em', '2em'),
+                '1em 2em 3em': ('1em', '2em', '3em', '2em'),
+                '1 2 3 4': ('1', '2', '3', '4'),
+            }.iteritems():
+                for prefix in ('margin', 'padding'):
+                    cval = tuple(parseStyle('%s: %s' % (prefix, raw), validate=False))[0].cssValue
+                    self.assertDictEqual(edge_dict(prefix, expected), normalizers[prefix](prefix, cval))
+
+        def test_list_style_normalization(self):
+            def ls_dict(expected):
+                ans = {'list-style-%s' % x : DEFAULTS['list-style-%s' % x] for x in ('type', 'image', 'position')}
+                for k, v in expected.iteritems():
+                    ans['list-style-%s' % k] = v
+                return ans
+            for raw, expected in {
+                'url(http://www.example.com/images/list.png)': {'image': 'url(http://www.example.com/images/list.png)'},
+                'inside square': {'position':'inside', 'type':'square'},
+                'upper-roman url(img) outside': {'position':'outside', 'type':'upper-roman', 'image':'url(img)'},
+            }.iteritems():
+                cval = tuple(parseStyle('list-style: %s' % raw, validate=False))[0].cssValue
+                self.assertDictEqual(ls_dict(expected), normalizers['list-style']('list-style', cval))
+
+        def test_edge_condensation(self):
+            for s, v in {
+                (1, 1, 3) : None,
+                (1, 2, 3, 4) : '2pt 3pt 4pt 1pt',
+                (1, 2, 3, 2) : '2pt 3pt 2pt 1pt',
+                (1, 2, 1, 3) : '2pt 1pt 3pt',
+                (1, 2, 1, 2) : '2pt 1pt',
+                (1, 1, 1, 1) : '1pt',
+                ('2%', '2%', '2%', '2%') : '2%',
+                tuple('0 0 0 0'.split()) : '0',
+            }.iteritems():
+                for prefix in ('margin', 'padding'):
+                    css = {'%s-%s' % (prefix, x) : str(y)+'pt' if isinstance(y, (int, float)) else y for x, y in zip(('left', 'top', 'right', 'bottom'), s)}
+                    css = '; '.join(('%s:%s' % (k, v) for k, v in css.iteritems()))
+                    style = parseStyle(css)
+                    condense_rule(style)
+                    val = getattr(style.getProperty(prefix), 'value', None)
+                    self.assertEqual(v, val)
+                    if val is not None:
+                        for edge in EDGES:
+                            self.assertFalse(getattr(style.getProperty('%s-%s' % (prefix, edge)), 'value', None))
+
+        def test_border_condensation(self):
+            vals = 'red solid 5px'
+            css = '; '.join('border-%s-%s: %s' % (edge, p, v) for edge in EDGES for p, v in zip(BORDER_PROPS, vals.split()))
+            style = parseStyle(css)
+            condense_rule(style)
+            for e, p in product(EDGES, BORDER_PROPS):
+                self.assertFalse(style.getProperty('border-%s-%s' % (e, p)))
+                self.assertFalse(style.getProperty('border-%s' % e))
+                self.assertFalse(style.getProperty('border-%s' % p))
+            self.assertEqual(style.getProperty('border').value, vals)
+            css = '; '.join('border-%s-%s: %s' % (edge, p, v) for edge in ('top',) for p, v in zip(BORDER_PROPS, vals.split()))
+            style = parseStyle(css)
+            condense_rule(style)
+            self.assertEqual(style.cssText, 'border-top: %s' % vals)
+            css += ';' + '; '.join('border-%s-%s: %s' % (edge, p, v) for edge in ('right', 'left', 'bottom') for p, v in
+                             zip(BORDER_PROPS, vals.replace('red', 'green').split()))
+            style = parseStyle(css)
+            condense_rule(style)
+            self.assertEqual(len(style.getProperties()), 4)
+            self.assertEqual(style.getProperty('border-top').value, vals)
+            self.assertEqual(style.getProperty('border-left').value, vals.replace('red', 'green'))
+
+    tests = unittest.defaultTestLoader.loadTestsFromTestCase(TestNormalization)
+    unittest.TextTestRunner(verbosity=4).run(tests)
+# }}}
+
+if __name__ == '__main__':
+    test_normalization()

src/calibre/ebooks/oeb/stylizer.py

@@ -8,15 +8,11 @@ from __future__ import with_statement
 __license__   = 'GPL v3'
 __copyright__ = '2008, Marshall T. Vandegrift <llasram@gmail.com>'
 
-import os, itertools, re, logging, copy, unicodedata
+import os, re, logging, copy, unicodedata
 from weakref import WeakKeyDictionary
 from xml.dom import SyntaxErr as CSSSyntaxError
 from cssutils.css import (CSSStyleRule, CSSPageRule, CSSFontFaceRule,
         cssproperties)
-try:
-    from cssutils.css import PropertyValue
-except ImportError:
-    raise RuntimeError('You need cssutils >= 0.9.9 for calibre')
 from cssutils import (profile as cssprofiles, parseString, parseStyle, log as
         cssutils_log, CSSParser, profiles, replaceUrls)
 from lxml import etree
@@ -24,8 +20,8 @@ from cssselect import HTMLTranslator
 
 from calibre import force_unicode
 from calibre.ebooks import unit_convert
-from calibre.ebooks.oeb.base import XHTML, XHTML_NS, CSS_MIME, OEB_STYLES
-from calibre.ebooks.oeb.base import XPNSMAP, xpath, urlnormalize
+from calibre.ebooks.oeb.base import XHTML, XHTML_NS, CSS_MIME, OEB_STYLES, XPNSMAP, xpath, urlnormalize
+from calibre.ebooks.oeb.normalize_css import DEFAULTS, normalizers
 
 cssutils_log.setLevel(logging.WARN)
 
@@ -54,46 +50,6 @@ INHERITED = set(['azimuth', 'border-collapse', 'border-spacing',
                  'visibility', 'voice-family', 'volume', 'white-space',
                  'widows', 'word-spacing'])
 
-DEFAULTS = {'azimuth': 'center', 'background-attachment': 'scroll',
-            'background-color': 'transparent', 'background-image': 'none',
-            'background-position': '0% 0%', 'background-repeat': 'repeat',
-            'border-bottom-color': ':color', 'border-bottom-style': 'none',
-            'border-bottom-width': 'medium', 'border-collapse': 'separate',
-            'border-left-color': ':color', 'border-left-style': 'none',
-            'border-left-width': 'medium', 'border-right-color': ':color',
-            'border-right-style': 'none', 'border-right-width': 'medium',
-            'border-spacing': 0, 'border-top-color': ':color',
-            'border-top-style': 'none', 'border-top-width': 'medium', 'bottom':
-            'auto', 'caption-side': 'top', 'clear': 'none', 'clip': 'auto',
-            'color': 'black', 'content': 'normal', 'counter-increment': 'none',
-            'counter-reset': 'none', 'cue-after': 'none', 'cue-before': 'none',
-            'cursor': 'auto', 'direction': 'ltr', 'display': 'inline',
-            'elevation': 'level', 'empty-cells': 'show', 'float': 'none',
-            'font-family': 'serif', 'font-size': 'medium', 'font-style':
-            'normal', 'font-variant': 'normal', 'font-weight': 'normal',
-            'height': 'auto', 'left': 'auto', 'letter-spacing': 'normal',
-            'line-height': 'normal', 'list-style-image': 'none',
-            'list-style-position': 'outside', 'list-style-type': 'disc',
-            'margin-bottom': 0, 'margin-left': 0, 'margin-right': 0,
-            'margin-top': 0, 'max-height': 'none', 'max-width': 'none',
-            'min-height': 0, 'min-width': 0, 'orphans': '2',
-            'outline-color': 'invert', 'outline-style': 'none',
-            'outline-width': 'medium', 'overflow': 'visible', 'padding-bottom':
-            0, 'padding-left': 0, 'padding-right': 0, 'padding-top': 0,
-            'page-break-after': 'auto', 'page-break-before': 'auto',
-            'page-break-inside': 'auto', 'pause-after': 0, 'pause-before':
-            0, 'pitch': 'medium', 'pitch-range': '50', 'play-during': 'auto',
-            'position': 'static', 'quotes': u"'“' '”' '‘' '’'", 'richness':
-            '50', 'right': 'auto', 'speak': 'normal', 'speak-header': 'once',
-            'speak-numeral': 'continuous', 'speak-punctuation': 'none',
-            'speech-rate': 'medium', 'stress': '50', 'table-layout': 'auto',
-            'text-align': 'auto', 'text-decoration': 'none', 'text-indent':
-            0, 'text-transform': 'none', 'top': 'auto', 'unicode-bidi':
-            'normal', 'vertical-align': 'baseline', 'visibility': 'visible',
-            'voice-family': 'default', 'volume': 'medium', 'white-space':
-            'normal', 'widows': '2', 'width': 'auto', 'word-spacing': 'normal',
-            'z-index': 'auto'}
-
 FONT_SIZE_NAMES = set(['xx-small', 'x-small', 'small', 'medium', 'large',
                        'x-large', 'xx-large'])
 
@@ -421,14 +377,11 @@ class Stylizer(object):
         style = {}
         for prop in cssstyle:
             name = prop.name
-            if name in ('margin', 'padding'):
-                style.update(self._normalize_edge(prop.cssValue, name))
-            elif name == 'font':
-                style.update(self._normalize_font(prop.cssValue))
-            elif name == 'list-style':
-                style.update(self._normalize_list_style(prop.cssValue))
+            normalizer = normalizers.get(name, None)
+            if normalizer is not None:
+                style.update(normalizer(name, prop.cssValue))
             elif name == 'text-align':
-                style.update(self._normalize_text_align(prop.cssValue))
+                style['text-align'] = self._apply_text_align(prop.value)
             else:
                 style[name] = prop.value
         if 'font-size' in style:
@@ -441,93 +394,10 @@ class Stylizer(object):
                 style['font-size'] = "%dpt" % self.profile.fnames[size]
         return style
 
-    def _normalize_edge(self, cssvalue, name):
-        style = {}
-        if isinstance(cssvalue, PropertyValue):
-            primitives = [v.cssText for v in cssvalue]
-        else:
-            primitives = [cssvalue.cssText]
-        if len(primitives) == 1:
-            value, = primitives
-            values = [value, value, value, value]
-        elif len(primitives) == 2:
-            vert, horiz = primitives
-            values = [vert, horiz, vert, horiz]
-        elif len(primitives) == 3:
-            top, horiz, bottom = primitives
-            values = [top, horiz, bottom, horiz]
-        else:
-            values = primitives[:4]
-        edges = ('top', 'right', 'bottom', 'left')
-        for edge, value in itertools.izip(edges, values):
-            style["%s-%s" % (name, edge)] = value
-        return style
-
-    def _normalize_list_style(self, cssvalue):
-        composition = ('list-style-type', 'list-style-position',
-                       'list-style-image')
-        style = {}
-        if cssvalue.cssText == 'inherit':
-            for key in composition:
-                style[key] = 'inherit'
-        else:
-            try:
-                primitives = [v.cssText for v in cssvalue]
-            except TypeError:
-                primitives = [cssvalue.cssText]
-            primitives.reverse()
-            value = primitives.pop()
-            for key in composition:
-                if cssprofiles.validate(key, value):
-                    style[key] = value
-                    if not primitives:
-                        break
-                    value = primitives.pop()
-            for key in composition:
-                if key not in style:
-                    style[key] = DEFAULTS[key]
-
-        return style
-
-    def _normalize_text_align(self, cssvalue):
-        style = {}
-        text = cssvalue.cssText
-        if text == 'inherit':
-            style['text-align'] = 'inherit'
-        else:
+    def _apply_text_align(self, text):
         if text in ('left', 'justify') and self.opts.change_justification in ('left', 'justify'):
-                val = self.opts.change_justification
-                style['text-align'] = val
-            else:
-                style['text-align'] = text
-        return style
-
-    def _normalize_font(self, cssvalue):
-        composition = ('font-style', 'font-variant', 'font-weight',
-                       'font-size', 'line-height', 'font-family')
-        style = {}
-        if cssvalue.cssText == 'inherit':
-            for key in composition:
-                style[key] = 'inherit'
-        else:
-            try:
-                primitives = [v.cssText for v in cssvalue]
-            except TypeError:
-                primitives = [cssvalue.cssText]
-            primitives.reverse()
-            value = primitives.pop()
-            for key in composition:
-                if cssprofiles.validate(key, value):
-                    style[key] = value
-                    if not primitives:
-                        break
-                    value = primitives.pop()
-            for key in composition:
-                if key not in style:
-                    val = ('inherit' if key in {'font-family', 'font-size'}
-                        else 'normal')
-                    style[key] = val
-        return style
+            text = self.opts.change_justification
+        return text
 
     def style(self, element):
         try: