Break out expression parsing and resolution.

1 files changed, 43 insertions, 0 deletions

diff --git a/scss/cssdefs.py b/scss/cssdefs.py
index 3da1fe2..85cc4c9 100644
--- a/scss/cssdefs.py
+++ b/scss/cssdefs.py
@@ -1,3 +1,6 @@
+import re
+
+
 # color literals
 _colors = {
     'aliceblue': '#f0f8ff',
@@ -213,3 +216,43 @@ __elements_of_type = {
     'html5-inline': dict(enumerate(sorted(__elements_of_type_html5_inline.replace(' ', '').split(',')))),
     'html5': dict(enumerate(sorted(__elements_of_type_html5.replace(' ', '').split(',')))),
 }
+
+
+# Known function names
+FUNCTIONS_CSS2 = 'attr counter counters url rgb rect'
+## CSS3
+FUNCTIONS_UNITS = 'calc min max cycle'  # http://www.w3.org/TR/css3-values/
+FUNCTIONS_COLORS = 'rgba hsl hsla'  # http://www.w3.org/TR/css3-color/
+FUNCTIONS_FONTS = 'local format'  # http://www.w3.org/TR/css3-fonts/
+# http://www.w3.org/TR/css3-images
+FUNCTIONS_IMAGES = 'image element linear-gradient radial-gradient '\
+                   'repeating-linear-gradient repeating-radial-gradient'
+# http://www.w3.org/TR/css3-2d-transforms/
+FUNCTIONS_2D = 'matrix translate translateX translateY scale '\
+               'scale scaleX scaleY rotate skew skewX skewY'
+# http://www.w3.org/TR/css3-3d-transforms/
+FUNCTIONS_3D = 'matrix3d translate3d translateZ scale3d scaleZ rotate3d '\
+               'rotateX rotateY rotateZ perspective'
+# http://www.w3.org/TR/css3-transitions/
+FUNCTIONS_TRANSITIONS = 'cubic-bezier'
+# http://www.w3.org/TR/css3-animations/
+FUNCTIONS_ANIMATIONS = ''  # has 'from' and 'to' block selectors, but no new function
+FUNCTIONS_FILTER = 'grayscale blur sepia saturate opacity brightness contrast hue-rotate invert'
+FUNCTIONS_OTHERS = 'from to color-stop mask'
+VENDORS = '-[^-]+-.+'
+
+_css_functions_re = re.compile(r'^(%s)$' % (
+    '|'.join(' '.join([
+        FUNCTIONS_CSS2,
+        FUNCTIONS_UNITS,
+        FUNCTIONS_COLORS,
+        FUNCTIONS_FONTS,
+        FUNCTIONS_IMAGES,
+        FUNCTIONS_2D,
+        FUNCTIONS_3D,
+        FUNCTIONS_TRANSITIONS,
+        FUNCTIONS_ANIMATIONS,
+        FUNCTIONS_FILTER,
+        FUNCTIONS_OTHERS,
+        VENDORS,
+    ]).split())))