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#!/usr/bin/env python
# Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above
# copyright notice, this list of conditions and the following
# disclaimer.
# 2. Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials
# provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
# TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
import logging
import re
from webkitpy.common.host import Host
from webkitpy.common.webkit_finder import WebKitFinder
from webkitpy.thirdparty.BeautifulSoup import BeautifulSoup, Tag
_log = logging.getLogger(__name__)
class W3CTestConverter(object):
def __init__(self):
self._host = Host()
self._filesystem = self._host.filesystem
self._webkit_root = WebKitFinder(self._filesystem).webkit_base()
# These settings might vary between WebKit and Blink
self._css_property_file = self.path_from_webkit_root('Source', 'WebCore', 'css', 'CSSPropertyNames.in')
self._css_property_split_string = '='
self.prefixed_properties = self.read_webkit_prefixed_css_property_list()
def path_from_webkit_root(self, *comps):
return self._filesystem.abspath(self._filesystem.join(self._webkit_root, *comps))
def read_webkit_prefixed_css_property_list(self):
prefixed_properties = []
contents = self._filesystem.read_text_file(self._css_property_file)
for line in contents.splitlines():
# Find lines starting with the -webkit- prefix.
match = re.match('-webkit-[\w|-]*', line)
if match:
# Ignore lines where both the prefixed and non-prefixed property
# are supported - denoted by -webkit-some-property = some-property.
fields = line.split(self._css_property_split_string)
if len(fields) == 2 and fields[1].strip() in fields[0].strip():
continue
prefixed_properties.append(match.group(0))
return prefixed_properties
def convert_for_webkit(self, new_path, filename):
""" Converts a file's |contents| so it will function correctly in its |new_path| in Webkit.
Returns the list of modified properties and the modified text if the file was modifed, None otherwise."""
contents = self._filesystem.read_binary_file(filename)
if filename.endswith('.css'):
return self.convert_css(contents, filename)
return self.convert_html(new_path, contents, filename)
def convert_css(self, contents, filename):
return self.add_webkit_prefix_to_unprefixed_properties(contents, filename)
def convert_html(self, new_path, contents, filename):
doc = BeautifulSoup(contents)
did_modify_paths = self.convert_testharness_paths(doc, new_path, filename)
converted_properties_and_content = self.convert_prefixed_properties(doc, filename)
return converted_properties_and_content if (did_modify_paths or converted_properties_and_content[0]) else None
def convert_testharness_paths(self, doc, new_path, filename):
""" Update links to testharness.js in the BeautifulSoup |doc| to point to the copy in |new_path|.
Returns whether the document was modified."""
# Look for the W3C-style path to any testharness files - scripts (.js) or links (.css)
pattern = re.compile('/resources/testharness')
script_tags = doc.findAll(src=pattern)
link_tags = doc.findAll(href=pattern)
testharness_tags = script_tags + link_tags
if not testharness_tags:
return False
resources_path = self.path_from_webkit_root('LayoutTests', 'resources')
resources_relpath = self._filesystem.relpath(resources_path, new_path)
for tag in testharness_tags:
# FIXME: We need to handle img, audio, video tags also.
attr = 'src'
if tag.name != 'script':
attr = 'href'
if not attr in tag.attrMap:
# FIXME: Figure out what to do w/ invalid tags. For now, we return False
# and leave the document unmodified, which means that it'll probably fail to run.
_log.error("Missing an attr in %s" % filename)
return False
old_path = tag[attr]
new_tag = Tag(doc, tag.name, tag.attrs)
new_tag[attr] = re.sub(pattern, resources_relpath + '/testharness', old_path)
self.replace_tag(tag, new_tag)
return True
def convert_prefixed_properties(self, doc, filename):
""" Searches a BeautifulSoup |doc| for any CSS properties requiring the -webkit- prefix and converts them.
Returns the list of converted properties and the modified document as a string """
converted_properties = []
# Look for inline and document styles.
inline_styles = doc.findAll(style=re.compile('.*'))
style_tags = doc.findAll('style')
all_styles = inline_styles + style_tags
for tag in all_styles:
# Get the text whether in a style tag or style attribute.
style_text = ''
if tag.name == 'style':
if not tag.contents:
continue
style_text = tag.contents[0]
else:
style_text = tag['style']
updated_style_text = self.add_webkit_prefix_to_unprefixed_properties(style_text, filename)
# Rewrite tag only if changes were made.
if updated_style_text[0]:
converted_properties.extend(updated_style_text[0])
new_tag = Tag(doc, tag.name, tag.attrs)
new_tag.insert(0, updated_style_text[1])
self.replace_tag(tag, new_tag)
return (converted_properties, doc.prettify())
def add_webkit_prefix_to_unprefixed_properties(self, text, filename):
""" Searches |text| for instances of properties requiring the -webkit- prefix and adds the prefix to them.
Returns the list of converted properties and the modified text."""
converted_properties = []
for prefixed_property in self.prefixed_properties:
# FIXME: add in both the prefixed and unprefixed versions, rather than just replacing them?
# That might allow the imported test to work in other browsers more easily.
unprefixed_property = prefixed_property.replace('-webkit-', '')
# Look for the various ways it might be in the CSS
# Match the the property preceded by either whitespace or left curly brace
# or at the beginning of the string (for inline style attribute)
pattern = '([\s{]|^)' + unprefixed_property + '(\s+:|:)'
if re.search(pattern, text):
_log.info('converting %s -> %s' % (unprefixed_property, prefixed_property))
converted_properties.append(prefixed_property)
text = re.sub(pattern, prefixed_property + ':', text)
# FIXME: Handle the JS versions of these properties and GetComputedStyle, too.
return (converted_properties, text)
def replace_tag(self, old_tag, new_tag):
index = old_tag.parent.contents.index(old_tag)
old_tag.parent.insert(index, new_tag)
old_tag.extract()
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