def perform(self, document, sourceHTML, sourceURL, encoding=None, copy_style=False):
aggregate_css = ""
# Retrieve CSS rel links from html pasted and aggregate into one string
CSSRelSelector = CSSSelector("link[rel=stylesheet],link[rel=StyleSheet],link[rel=STYLESHEET]")
matching = CSSRelSelector.evaluate(document)
for element in matching:
try:
csspath = element.get("href")
if len(sourceURL):
if element.get("href").lower().find("http://", 0) < 0:
parsed_url = urlparse.urlparse(sourceURL)
csspath = urlparse.urljoin(parsed_url.scheme + "://" + parsed_url.hostname, csspath)
css_content = requests.get(csspath).text
aggregate_css += ''.join(css_content)
element.getparent().remove(element)
except:
raise IOError('The stylesheet ' + element.get("href") + ' could not be found')
# Include inline style elements
CSSStyleSelector = CSSSelector("style,Style")
matching = CSSStyleSelector.evaluate(document)
for element in matching:
if element.text:
aggregate_css += element.text
element.getparent().remove(element)
# Convert document to a style dictionary compatible with etree
styledict = self.get_view(document, aggregate_css)
# Set inline style attribute if not one of the elements not worth styling
ignore_list = ['html', 'head', 'title', 'meta', 'link', 'script']
for element, style in styledict.items():
if element.tag not in ignore_list:
v = style.getCssText(separator=u'')
element.set('style', v)
if copy_style:
sheet = cssutils.css.CSSStyleSheet()
for rule in self.used_rules:
sheet.add(rule)
style = etree.HTML("<style>" + sheet.cssText + "</style>")
document.find('.//body').insert(0, style.find(".//style"))
self.convertedHTML = etree.tostring(document, method="xml", pretty_print=True, encoding=encoding)
self.convertedHTML = self.convertedHTML.decode(encoding).replace(' ', '') # Tedious raw conversion of line breaks.
return self
def perform(self, document, sourceHTML, sourceURL, encoding=None):
aggregate_css = ""
# Retrieve CSS rel links from html pasted and aggregate into one string
CSSRelSelector = CSSSelector("link[rel=stylesheet],link[rel=StyleSheet],link[rel=STYLESHEET]")
matching = CSSRelSelector.evaluate(document)
for element in matching:
try:
csspath = element.get("href")
if len(sourceURL):
if element.get("href").lower().find("http://", 0) < 0:
parsed_url = urlparse.urlparse(sourceURL)
csspath = urlparse.urljoin(parsed_url.scheme + "://" + parsed_url.hostname, csspath)
css_content = requests.get(csspath).text
# section: replace relative url to absolute url in css file
lr = lambda match_obj: Conversion.replace_url(csspath, match_obj)
css_content = Conversion.REGEX_URL.sub(lr, css_content)
# endsection
aggregate_css += ''.join(css_content)
element.getparent().remove(element)
except:
raise IOError('The stylesheet ' + element.get("href") + ' could not be found')
# Include inline style elements
CSSStyleSelector = CSSSelector("style,Style")
matching = CSSStyleSelector.evaluate(document)
for element in matching:
aggregate_css += element.text
element.getparent().remove(element)
# Convert document to a style dictionary compatible with etree
styledict = self.get_view(document, aggregate_css)
# Set inline style attribute if not one of the elements not worth styling
ignore_list = ['html', 'head', 'title', 'meta', 'link', 'script']
for element, style in styledict.items():
if element.tag not in ignore_list:
v = style.getCssText(separator=u'')
element.set('style', v)
self.convertedHTML = etree.tostring(document, method="xml", pretty_print=True, encoding=encoding)
self.convertedHTML = self.convertedHTML.decode(encoding).replace(' ', '') # Tedious raw conversion of line breaks.
return self
def perform(self, document, sourceHTML, sourceURL, encoding='unicode', remove_origin=True):
aggregate_css = ""
# Retrieve CSS rel links from html pasted and aggregate into one string
CSSRelSelector = CSSSelector("link[rel=stylesheet],link[rel=StyleSheet],link[rel=STYLESHEET]")
matching = CSSRelSelector.evaluate(document)
for element in matching:
try:
csspath = element.get("href")
if len(sourceURL):
if element.get("href").lower().find("http://", 0) < 0:
parsed_url = urlparse.urlparse(sourceURL)
csspath = urlparse.urljoin(parsed_url.scheme + "://" + parsed_url.hostname, csspath)
# Get css file. Don't verify SSL certificates. It's just a css.
# Cloudfront does not have correct SSL certificate and it fails.
css_content = requests.get(csspath, verify=False).text
aggregate_css += ''.join(css_content)
if remove_origin:
element.getparent().remove(element)
except:
raise IOError('The stylesheet ' + element.get("href") + ' could not be found')
# Include inline style elements
CSSStyleSelector = CSSSelector("style,Style")
matching = CSSStyleSelector.evaluate(document)
for element in matching:
aggregate_css += element.text
if remove_origin:
element.getparent().remove(element)
# Convert document to a style dictionary compatible with etree
styledict = self.get_view(document, aggregate_css)
# Set inline style attribute if not one of the elements not worth styling
ignore_list = ['html', 'head', 'title', 'meta', 'link', 'script']
for element, style in styledict.items():
if element.tag not in ignore_list:
v = style.getCssText(separator='')
element.set('style', v)
self.convertedHTML = etree.tostring(document, method="html", pretty_print=True, encoding=encoding)
return self
def perform(self,document,sourceHTML,sourceURL):
aggregateCSS="";
# retrieve CSS rel links from html pasted and aggregate into one string
CSSRelSelector = CSSSelector("link[rel=stylesheet],link[rel=StyleSheet],link[rel=STYLESHEET]")
matching = CSSRelSelector.evaluate(document)
for element in matching:
try:
csspath=element.get("href")
if len(sourceURL):
if element.get("href").lower().find("http://",0) < 0:
parsedUrl=urlparse.urlparse(sourceURL);
csspath=urlparse.urljoin(parsedUrl.scheme+"://"+parsedUrl.hostname, csspath)
f=urlopen(csspath)
aggregateCSS+=''.join(f.read())
element.getparent().remove(element)
except:
raise IOError('The stylesheet '+element.get("href")+' could not be found')
#include inline style elements
CSSStyleSelector = CSSSelector("style,Style")
matching = CSSStyleSelector.evaluate(document)
for element in matching:
aggregateCSS+=element.text
element.getparent().remove(element)
#convert document to a style dictionary compatible with etree
styledict = self.getView(document, aggregateCSS)
#set inline style attribute if not one of the elements not worth styling
ignoreList=['html','head','title','meta','link','script']
for element, style in styledict.items():
if element.tag not in ignoreList:
v = style.getCssText(separator=u'')
element.set('style', v)
#convert tree back to plain text html
self.convertedHTML = etree.tostring(document, method="xml", pretty_print=True,encoding='UTF-8')
self.convertedHTML= self.convertedHTML.decode('utf-8').replace(' ', '') #tedious raw conversion of line breaks.
return self
def perform(self, document, sourceHTML, sourceURL, encoding='unicode'):
aggregate_css = ""
# Retrieve CSS rel links from html pasted and aggregate into one string
CSSRelSelector = CSSSelector(
"link[rel=stylesheet],link[rel=StyleSheet],link[rel=STYLESHEET]")
matching = CSSRelSelector.evaluate(document)
for element in matching:
try:
csspath = element.get("href")
if len(sourceURL):
if element.get("href").lower().find("http://", 0) < 0:
parsed_url = urlparse.urlparse(sourceURL)
csspath = urlparse.urljoin(
parsed_url.scheme + "://" + parsed_url.hostname,
csspath)
if csspath.startswith("http"):
css_content = requests.get(csspath).text
else:
css_content = open(csspath, "r")
aggregate_css += ''.join(css_content)
element.getparent().remove(element)
except:
raise IOError('The stylesheet ' + element.get("href") +
' could not be found')
# Include inline style elements
CSSStyleSelector = CSSSelector("style,Style")
matching = CSSStyleSelector.evaluate(document)
for element in matching:
aggregate_css += element.text
element.getparent().remove(element)
# Convert document to a style dictionary compatible with etree
styledict = self.get_view(document, aggregate_css)
# Set inline style attribute if not one of the elements not worth styling
ignore_list = ['html', 'head', 'title', 'meta', 'link', 'script']
for element, style in styledict.items():
if element.tag not in ignore_list:
v = style.getCssText(separator='')
element.set('style', v)
self.convertedHTML = etree.tostring(document,
method="xml",
pretty_print=True,
encoding=encoding)
return self
def get_view(self, document, css):
view = {}
specificities = {}
supportratios = {}
support_failrate = 0
support_totalrate = 0
compliance = dict()
mycsv = csv.DictReader(open(os.path.join(os.path.dirname(__file__), "css_compliance.csv")), delimiter=',')
for row in mycsv:
# Count clients so we can calculate an overall support percentage later
client_count = len(row)
compliance[row['property'].strip()] = dict(row)
# Decrement client count to account for first col which is property name
client_count -= 1
sheet = cssutils.parseString(css)
rules = (rule for rule in sheet if rule.type == rule.STYLE_RULE)
for rule in rules:
for selector in rule.selectorList:
try:
cssselector = CSSSelector(selector.selectorText)
matching = cssselector.evaluate(document)
for element in matching:
# add styles for all matching DOM elements
if element not in view:
# add initial
view[element] = cssutils.css.CSSStyleDeclaration()
specificities[element] = {}
# add inline style if present
inlinestyletext = element.get('style')
if inlinestyletext:
inlinestyle = cssutils.css.CSSStyleDeclaration(cssText=inlinestyletext)
else:
inlinestyle = None
if inlinestyle:
for p in inlinestyle:
# set inline style specificity
view[element].setProperty(p)
specificities[element][p.name] = (1, 0, 0, 0)
for p in rule.style:
if p.name not in supportratios:
supportratios[p.name] = {'usage': 0, 'failedClients': 0}
supportratios[p.name]['usage'] += 1
try:
if p.name not in self.CSSUnsupportErrors:
for client, support in compliance[p.name].items():
if support == "N" or support == "P":
# Increment client failure count for this property
supportratios[p.name]['failedClients'] += 1
if p.name not in self.CSSUnsupportErrors:
if support == "P":
self.CSSUnsupportErrors[p.name] = [client + ' (partial support)']
else:
self.CSSUnsupportErrors[p.name] = [client]
else:
if support == "P":
self.CSSUnsupportErrors[p.name].append(client + ' (partial support)')
else:
self.CSSUnsupportErrors[p.name].append(client)
except KeyError:
pass
# update styles
if p not in view[element]:
view[element].setProperty(p.name, p.value, p.priority)
specificities[element][p.name] = selector.specificity
else:
sameprio = (p.priority == view[element].getPropertyPriority(p.name))
if not sameprio and bool(p.priority) or (sameprio and selector.specificity >= specificities[element][p.name]):
# later, more specific or higher prio
view[element].setProperty(p.name, p.value, p.priority)
except ExpressionError:
if str(sys.exc_info()[1]) not in self.CSSErrors:
self.CSSErrors.append(str(sys.exc_info()[1]))
pass
for props, propvals in supportratios.items():
support_failrate += (propvals['usage']) * int(propvals['failedClients'])
support_totalrate += int(propvals['usage']) * client_count
if support_failrate and support_totalrate:
self.supportPercentage = 100 - ((float(support_failrate) / float(support_totalrate)) * 100)
return view
def get_view(self, document, css):
view = {}
specificities = {}
supportratios = {}
support_failrate = 0
support_totalrate = 0
compliance = dict()
with open(os.path.join(os.path.dirname(__file__),
"css_compliance.csv")) as csv_file:
compat_list = csv_file.readlines()
mycsv = csv.DictReader(compat_list, delimiter=str(','))
for row in mycsv:
# Count clients so we can calculate an overall support percentage later
client_count = len(row)
compliance[row['property'].strip()] = dict(row)
# Decrement client count to account for first col which is property name
client_count -= 1
sheet = cssutils.parseString(css)
rules = (rule for rule in sheet if rule.type == rule.STYLE_RULE)
for rule in rules:
for selector in rule.selectorList:
try:
cssselector = CSSSelector(selector.selectorText)
matching = cssselector.evaluate(document)
for element in matching:
# add styles for all matching DOM elements
if element not in view:
# add initial
view[element] = cssutils.css.CSSStyleDeclaration()
specificities[element] = {}
# add inline style if present
inlinestyletext = element.get('style')
if inlinestyletext:
inlinestyle = cssutils.css.CSSStyleDeclaration(
cssText=inlinestyletext)
else:
inlinestyle = None
if inlinestyle:
for p in inlinestyle:
# set inline style specificity
view[element].setProperty(p)
specificities[element][p.name] = (1, 0, 0,
0)
for p in rule.style:
if p.name not in supportratios:
supportratios[p.name] = {
'usage': 0,
'failedClients': 0
}
supportratios[p.name]['usage'] += 1
try:
if p.name not in self.CSSUnsupportErrors:
for client, support in compliance[
p.name].items():
if support == "N" or support == "P":
# Increment client failure count for this property
supportratios[
p.name]['failedClients'] += 1
if p.name not in self.CSSUnsupportErrors:
if support == "P":
self.CSSUnsupportErrors[
p.name] = [
client +
' (partial support)'
]
else:
self.CSSUnsupportErrors[
p.name] = [client]
else:
if support == "P":
self.CSSUnsupportErrors[
p.name].append(
client +
' (partial support)'
)
else:
self.CSSUnsupportErrors[
p.name].append(client)
except KeyError:
pass
# update styles
if p not in view[element]:
view[element].setProperty(
p.name, p.value, p.priority)
specificities[element][
p.name] = selector.specificity
else:
sameprio = (p.priority ==
view[element].getPropertyPriority(
p.name))
if not sameprio and bool(p.priority) or (
sameprio and selector.specificity >=
specificities[element][p.name]):
# later, more specific or higher prio
view[element].setProperty(
p.name, p.value, p.priority)
except ExpressionError:
if str(sys.exc_info()[1]) not in self.CSSErrors:
self.CSSErrors.append(str(sys.exc_info()[1]))
pass
for props, propvals in supportratios.items():
support_failrate += (propvals['usage']) * int(
propvals['failedClients'])
support_totalrate += int(propvals['usage']) * client_count
if support_failrate and support_totalrate:
self.supportPercentage = 100 - (
(float(support_failrate) / float(support_totalrate)) * 100)
return view
