mirror of
https://github.com/gryf/ebook-converter.git
synced 2026-04-17 11:43:30 +02:00
45 lines
1.5 KiB
Python
45 lines
1.5 KiB
Python
from __future__ import absolute_import, division, print_function, unicode_literals
|
|
|
|
|
|
def _optimize(tagList, tagName, conversion):
|
|
# copy the tag of interest plus any text
|
|
newTagList = []
|
|
for tag in tagList:
|
|
if tag.name == tagName or tag.name == "rawtext":
|
|
newTagList.append(tag)
|
|
|
|
# now, eliminate any duplicates (leaving the last one)
|
|
for i, newTag in enumerate(newTagList[:-1]):
|
|
if newTag.name == tagName and newTagList[i+1].name == tagName:
|
|
tagList.remove(newTag)
|
|
|
|
# eliminate redundant settings to same value across text strings
|
|
newTagList = []
|
|
for tag in tagList:
|
|
if tag.name == tagName:
|
|
newTagList.append(tag)
|
|
|
|
for i, newTag in enumerate(newTagList[:-1]):
|
|
value = conversion(newTag.parameter)
|
|
nextValue = conversion(newTagList[i+1].parameter)
|
|
if value == nextValue:
|
|
tagList.remove(newTagList[i+1])
|
|
|
|
# eliminate any setting that don't have text after them
|
|
while len(tagList) > 0 and tagList[-1].name == tagName:
|
|
del tagList[-1]
|
|
|
|
|
|
def tagListOptimizer(tagList):
|
|
# this function eliminates redundant or unnecessary tags
|
|
# it scans a list of tags, looking for text settings that are
|
|
# changed before any text is output
|
|
# for example,
|
|
# fontsize=100, fontsize=200, text, fontsize=100, fontsize=200
|
|
# should be:
|
|
# fontsize=200 text
|
|
oldSize = len(tagList)
|
|
_optimize(tagList, "fontsize", int)
|
|
_optimize(tagList, "fontweight", int)
|
|
return oldSize - len(tagList)
|