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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import os
import sys
import HTMLParser
import urlparse
def rewrite_links(env_root, sdk_docs_path, page, dest_path):
dest_path_depth = len(dest_path.split(os.sep)) -1 # because dest_path includes filename
docs_root_depth = len(sdk_docs_path.split(os.sep))
relative_depth = dest_path_depth - docs_root_depth
linkRewriter = LinkRewriter("../" * relative_depth)
return linkRewriter.rewrite_links(page)
class LinkRewriter(HTMLParser.HTMLParser):
def __init__(self, link_prefix):
HTMLParser.HTMLParser.__init__(self)
self.stack = []
self.link_prefix = link_prefix
def rewrite_links(self, page):
self.feed(page)
self.close()
page = ''.join(self.stack)
self.stack = []
return page
def handle_decl(self, decl):
self.stack.append("<!" + decl + ">")
def handle_comment(self, decl):
self.stack.append("<!--" + decl + "-->")
def handle_starttag(self, tag, attrs):
self.stack.append(self.__html_start_tag(tag, self._rewrite_link(attrs)))
def handle_entityref(self, name):
self.stack.append("&" + name + ";")
def handle_endtag(self, tag):
self.stack.append(self.__html_end_tag(tag))
def handle_startendtag(self, tag, attrs):
self.stack.append(self.__html_startend_tag(tag, self._rewrite_link(attrs)))
def _update_attribute(self, attr_name, attrs):
attr_value = attrs.get(attr_name, '')
if attr_value:
parsed = urlparse.urlparse(attr_value)
if not parsed.scheme:
attrs[attr_name] = self.link_prefix + attr_value
def _rewrite_link(self, attrs):
attrs = dict(attrs)
self._update_attribute('href', attrs)
self._update_attribute('src', attrs)
self._update_attribute('action', attrs)
return attrs
def handle_data(self, data):
self.stack.append(data)
def __html_start_tag(self, tag, attrs):
return '<%s%s>' % (tag, self.__html_attrs(attrs))
def __html_startend_tag(self, tag, attrs):
return '<%s%s/>' % (tag, self.__html_attrs(attrs))
def __html_end_tag(self, tag):
return '</%s>' % (tag)
def __html_attrs(self, attrs):
_attrs = ''
if attrs:
_attrs = ' %s' % (' '.join([('%s="%s"' % (k,v)) for k,v in dict(attrs).iteritems()]))
return _attrs
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