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# -*- coding: utf-8 -*-
"""
    sphinx.writers.websupport
    ~~~~~~~~~~~~~~~~~~~~~~~~~

    sphinx.websupport writer that adds comment-related annotations.

    :copyright: Copyright 2007-2011 by the Sphinx team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

from sphinx.writers.html import HTMLTranslator
from sphinx.util.websupport import is_commentable


class WebSupportTranslator(HTMLTranslator):
    """
    Our custom HTML translator.
    """

    def __init__(self, builder, *args, **kwargs):
        HTMLTranslator.__init__(self, builder, *args, **kwargs)
        self.comment_class = 'sphinx-has-comment'

    def dispatch_visit(self, node):
        if is_commentable(node):
            self.handle_visit_commentable(node)
        HTMLTranslator.dispatch_visit(self, node)

    def handle_visit_commentable(self, node):
        # We will place the node in the HTML id attribute. If the node
        # already has an id (for indexing purposes) put an empty
        # span with the existing id directly before this node's HTML.
        self.add_db_node(node)
        if node.attributes['ids']:
            self.body.append('<span id="%s"></span>'
                             % node.attributes['ids'][0])
        node.attributes['ids'] = ['s%s' % node.uid]
        node.attributes['classes'].append(self.comment_class)

    def add_db_node(self, node):
        storage = self.builder.storage
        if not storage.has_node(node.uid):
            storage.add_node(id=node.uid,
                             document=self.builder.cur_docname,
                             source=node.rawsource or node.astext())