cssvalues: serialize quotes, add font-size, opacity

font-size isn't very useful, but some scripts assume it exists.

opacity: 0 for now is special cased: it inhibits rendering of further
boxes.  This isn't quite right, as it should just behave as a pseudo
visibility: hidden... nonetheless it's quite effective at hiding
garbage.

(Also, remove incorrect comment - it can be nil if the branch has no
variables.)

1 files changed, 7 insertions, 0 deletions

diff --git a/src/utils/twtstr.nim b/src/utils/twtstr.nim
index b646483a..7c905aa3 100644
--- a/src/utils/twtstr.nim
+++ b/src/utils/twtstr.nim
@@ -502,6 +502,13 @@ func dqEscape*(s: openArray[char]): string =
       result &= '\\'
     result &= c
 
+func cssEscape*(s: openArray[char]): string =
+  result = ""
+  for c in s:
+    if c == '\'':
+      result &= '\\'
+    result &= c
+
 #basically std join but with char
 func join*(ss: openArray[string]; sep: char): string =
   if ss.len == 0: