#!/usr/bin/env python
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"""HTML support for CodeIntel"""

import os
import sys
import logging
import re
import traceback
from pprint import pprint

from codeintel2.common import *
from codeintel2.langintel import LangIntel
from codeintel2.udl import UDLLexer, UDLBuffer, UDLCILEDriver, XMLParsingBufferMixin
from codeintel2.lang_xml import XMLLangIntel
from HTMLTreeParser import html_optional_close_tags

if _xpcom_:
    from xpcom.server import UnwrapObject


#---- globals
lang = "HTML"
log = logging.getLogger("codeintel.html")


#---- language support
class HTMLLexer(UDLLexer):
    lang = lang


class HTMLLangIntel(XMLLangIntel):
    lang = lang

    def get_valid_tagnames(self, buf, pos, withPrefix=False):
        node = buf.xml_node_at_pos(pos)
        # print "get_valid_tagnames NODE %s:%s xmlns[%s]
        # %r"%(buf.xml_tree.prefix(node),node.localName,node.ns,node.tag)
        handlerclass = buf.xml_tree_handler(node)
        tagnames = None
        if node is not None:  # or not tree.parent(node):
            tagnames = set(handlerclass.tagnames(buf.xml_tree, node))
            while node is not None and node.localName in html_optional_close_tags:
                node = buf.xml_tree.parent(node)
                if node is not None:
                    tagnames = tagnames.union(
                        handlerclass.tagnames(buf.xml_tree, node))
        if not tagnames and hasattr(handlerclass, "dataset"):
            tagnames = handlerclass.dataset.all_element_types()
        if not tagnames:
            return None
        tagnames = list(tagnames)
        tagnames.sort()
        if withPrefix and node is not None:
            prefix = buf.xml_tree.prefix(node)
            if prefix:
                return ["%s:%s" % (prefix, name) for name in tagnames]
        return tagnames

    def cpln_end_tag(self, buf, trg):
        node = buf.xml_node_at_pos(trg.pos)
        if node is None:
            return None
        tagName = buf.xml_tree.tagname(node)
        if not tagName:
            return []

        # here on, we're only working with HTML documents
        line, col = buf.accessor.line_and_col_at_pos(trg.pos)
        names = [tagName]
        # if this is an optional close node, get parents until a node that
        # requires close is found
        while node is not None and node.localName in html_optional_close_tags:
            node = buf.xml_tree.parent(node)
            if node is None:
                break
            if not node.end:
                names.append(buf.xml_tree.tagname(node))
                continue
        return [('element', tagName+">") for tagName in names]


class HTMLBuffer(UDLBuffer, XMLParsingBufferMixin):
    lang = lang
    m_lang = "HTML"
    csl_lang = "JavaScript"
    css_lang = "CSS"

    # Characters that should close an autocomplete UI:
    # - wanted for XML completion: ">'\" "
    # - wanted for CSS completion: " ('\";},.>"
    # - wanted for JS completion:  "~`!@#%^&*()-=+{}[]|\\;:'\",.<>?/ "
    # - dropping ':' because I think that may be a problem for XML tag
    #   completion with namespaces (not sure of that though)
    # - dropping '[' because need for "<!<|>" -> "<![CDATA[" cpln
    # - dropping '-' because causes problem with CSS and XML (bug 78312)
    # - dropping '!' because causes problem with CSS "!important" (bug 78312)
    cpln_stop_chars = "'\" ;,~`@#%^&*()=+{}]|\\,.<>?/"


class HTMLCILEDriver(UDLCILEDriver):
    lang = lang
    csl_lang = "JavaScript"


#---- registration
def register(mgr):
    """Register language support with the Manager."""
    mgr.set_lang_info(lang,
                      silvercity_lexer=HTMLLexer(),
                      buf_class=HTMLBuffer,
                      langintel_class=HTMLLangIntel,
                      cile_driver_class=HTMLCILEDriver,
                      is_cpln_lang=True)
