#!python
# ***** BEGIN LICENSE BLOCK *****
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
# 
# The contents of this file are subject to the Mozilla Public License
# Version 1.1 (the "License"); you may not use this file except in
# compliance with the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
# 
# Software distributed under the License is distributed on an "AS IS"
# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
# License for the specific language governing rights and limitations
# under the License.
# 
# The Original Code is Komodo code.
# 
# The Initial Developer of the Original Code is ActiveState Software Inc.
# Portions created by ActiveState Software Inc are Copyright (C) 2000-2007
# ActiveState Software Inc. All Rights Reserved.
# 
# Contributor(s):
#   ActiveState Software Inc
# 
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 2 or later (the "GPL"), or
# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the MPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the MPL, the GPL or the LGPL.
# 
# ***** END LICENSE BLOCK *****

"""Perl-specific Language Services implementations."""

import os, sys
from xpcom import components, ServerException
from koLanguageServiceBase import *
import logging
import pprint
import re


#---- globals

log = logging.getLogger("koPerlLanguage")
#log.setLevel(logging.DEBUG)

sci_constants = components.interfaces.ISciMoz



#---- internal support routines

def isident(char):
    return "a" <= char <= "z" or "A" <= char <= "Z" or char == "_"

def isdigit(char):
    return "0" <= char <= "9"


#---- Language Service component implementations

class KoPerlLanguage(KoLanguageBase):
    name = "Perl"
    _reg_desc_ = "%s Language" % name
    _reg_contractid_ = "@activestate.com/koLanguage?language=%s;1" \
                       % (name)
    _reg_clsid_ = "{911E8F76-C8F9-46f2-A930-1F1693400FCB}"
    _reg_categories_ = [("komodo-language", name)]

    modeNames = ['perl']
    shebangPatterns = [re.compile(ur'\A#!.*perl.*$', re.IGNORECASE | re.MULTILINE)]
    primary = 1
    internal = 0
    accessKey = 'p'

    defaultExtension = ".pl"
    # XXX read url from some config file
    downloadURL = 'http://www.ActiveState.com/Products/ActivePerl'
    commentDelimiterInfo = { "line": [ "#" ]  }
    variableIndicators = '$@%'
    namedBlockRE = "^[ \t]*?(sub\s+\w+|package\s+\w)"
    namedBlockDescription = 'Perl subs and packages'

    _lineup_chars = u"{}()[]"
    _lineup_open_chars = "([{" # Perl tells the difference between the indent and lineup {}'s
    _lineup_close_chars = ")]}"

    supportsSmartIndent = "brace"
    sample = r"""#  Fruit salad recipe
my %salad;
while (<DATA>) {
	$salad{$1} = $2 if /^([a-z]+)\s+(\d+)/;
}
my @fruits = keys %salad;
foreach (@fruits) {
	my $fruit = $_;
	$fruit =~ s/s$// if $salad{$_} == 1;
	print "$salad{$_} $fruit\n";
}
print <<_HERE_DOC_
Cut and stir the fruit.
_HERE_DOC_
__DATA__
apples 2
pears 1
oranges 3
"""

    def __init__(self):
        KoLanguageBase.__init__(self)
        self._style_info.update(
            _indent_styles = [sci_constants.SCE_PL_OPERATOR],
            _lineup_close_styles = [sci_constants.SCE_PL_OPERATOR,
                                    sci_constants.SCE_PL_VARIABLE_INDEXER,
                                    sci_constants.SCE_PL_REGEX,
                                    sci_constants.SCE_PL_REGSUBST],
            _lineup_styles = [sci_constants.SCE_PL_OPERATOR,
                              sci_constants.SCE_PL_VARIABLE_INDEXER,
                              sci_constants.SCE_PL_REGEX,
                              sci_constants.SCE_PL_REGSUBST],
            _variable_styles = [sci_constants.SCE_PL_SCALAR,
                                sci_constants.SCE_PL_ARRAY,
                                sci_constants.SCE_PL_HASH,
                                sci_constants.SCE_PL_SYMBOLTABLE,
                                sci_constants.SCE_PL_VARIABLE_INDEXER,
                                sci_constants.SCE_PL_STRING_VAR,
                                sci_constants.SCE_PL_STRING_QQ_VAR,
                                sci_constants.SCE_PL_STRING_QX_VAR,
                                sci_constants.SCE_PL_BACKTICKS_VAR,
                                sci_constants.SCE_PL_HERE_QQ_VAR,
                                sci_constants.SCE_PL_HERE_QX_VAR,
                                sci_constants.SCE_PL_REGEX_VAR,
                                sci_constants.SCE_PL_REGSUBST_VAR,
                                sci_constants.SCE_PL_STRING_QR_VAR],
            )
        self.matchingSoftChars["`"] = ("`", self.softchar_accept_matching_backquote)
        self.matchingSoftChars["/"] = ("/", self.softchar_accept_matching_forward_slash)
        self.matchingSoftChars["("] = (")", self.softchar_check_special_then_return_char)
        self.matchingSoftChars["["] = ("]", self.softchar_check_special_then_return_char)
        self._fastCharData = \
            FastCharData(trigger_char=";",
                         style_list=(sci_constants.SCE_PL_OPERATOR,
                                     sci_constants.SCE_UDL_SSL_OPERATOR, ),
                         skippable_chars_by_style={ sci_constants.SCE_PL_OPERATOR : "])",
                                                    sci_constants.SCE_PL_VARIABLE_INDEXER : "])",
                                                    sci_constants.SCE_UDL_SSL_OPERATOR : "])",},
                         for_check=True)
        
    def getVariableStyles(self):
        return self._style_info._variable_styles

    def getLanguageService(self, iid):
        return KoLanguageBase.getLanguageService(self, iid)

    def get_lexer(self):
        if self._lexer is None:
            self._lexer = KoLexerLanguageService()
            self._lexer.setLexer(sci_constants.SCLEX_PERL)
            self._lexer.setKeywords(0, self._keywords)
            self._lexer.supportsFolding = 1
            self._lexer.setProperty('fold.perl.comment.explicit', '0') # explicit folding bugged as of Scintilla 3.7.3
        return self._lexer

    def get_interpreter(self):
        if self._interpreter is None:
            self._interpreter = components.classes["@activestate.com/koAppInfoEx?app=Perl;1"].getService()
        return self._interpreter

    _keywords = [
                 "__DATA__",
                 "__END__",
                 "__FILE__",
                 "__LINE__",
                 "__PACKAGE__",
                 "__SUB__", # Added in perl 5.16
                 "AUTOLOAD",
                 "BEGIN",
                 "CHECK",
                 "CORE",
                 "DESTROY",
                 "END",
                 "INIT",
                 "UNITCHECK",
                 "abs",
                 "accept",
                 "alarm",
                 "and",
                 "atan2",
                 "bind",
                 "binmode",
                 "bless",
                 "break",
                 "caller",
                 "chdir",
                 "chmod",
                 "chomp",
                 "chop",
                 "chown",
                 "chr",
                 "chroot",
                 "close",
                 "closedir",
                 "cmp",
                 "connect",
                 "continue",
                 "cos",
                 "crypt",
                 "dbmclose",
                 "dbmopen",
                 "default",
                 "defined",
                 "delete",
                 "die",
                 "do",
                 "dump",
                 "each",
                 "else",
                 "elsif",
                 "endgrent",
                 "endhostent",
                 "endnetent",
                 "endprotoent",
                 "endpwent",
                 "endservent",
                 "eof",
                 "eq",
                 "eval",
                 "exec",
                 "exists",
                 "exit",
                 "exp",
                 "fc", # Added in perl 5.16
                 "fcntl",
                 "fileno",
                 "flock",
                 "for",
                 "foreach",
                 "fork",
                 "format",
                 "formline",
                 "ge",
                 "getc",
                 "getgrent",
                 "getgrgid",
                 "getgrnam",
                 "gethostbyaddr",
                 "gethostbyname",
                 "gethostent",
                 "getlogin",
                 "getnetbyaddr",
                 "getnetbyname",
                 "getnetent",
                 "getpeername",
                 "getpgrp",
                 "getppid",
                 "getpriority",
                 "getprotobyname",
                 "getprotobynumber",
                 "getprotoent",
                 "getpwent",
                 "getpwnam",
                 "getpwuid",
                 "getservbyname",
                 "getservbyport",
                 "getservent",
                 "getsockname",
                 "getsockopt",
                 "given",
                 "glob",
                 "gmtime",
                 "goto",
                 "grep",
                 "gt",
                 "hex",
                 "if",
                 "import",
                 "include",
                 "index",
                 "int",
                 "ioctl",
                 "join",
                 "keys",
                 "kill",
                 "last",
                 "lc",
                 "lcfirst",
                 "le",
                 "length",
                 "link",
                 "listen",
                 "local",
                 "localtime",
                 "lock",
                 "log",
                 "lstat",
                 "lt",
                 "m",
                 "map",
                 "mkdir",
                 "msgctl",
                 "msgget",
                 "msgrcv",
                 "msgsnd",
                 "my",
                 "ne",
                 "new",
                 "next",
                 "no",
                 "not",
                 "oct",
                 "open",
                 "opendir",
                 "or",
                 "ord",
                 "our",
                 "pack",
                 "package",
                 "pipe",
                 "pop",
                 "pos",
                 "print",
                 "printf",
                 "prototype",
                 "push",
                 "q",
                 "qq",
                 "qr",
                 "qx",
                 "qw",
                 "quotemeta",
                 "rand",
                 "read",
                 "readdir",
                 "readline",
                 "readlink",
                 "readpipe",
                 "recv",
                 "redo",
                 "ref",
                 "rename",
                 "require",
                 "reset",
                 "return",
                 "reverse",
                 "rewinddir",
                 "rindex",
                 "rmdir",
                 "s",
                 "say",
                 "scalar",
                 "seek",
                 "seekdir",
                 "select",
                 "semctl",
                 "semget",
                 "semop",
                 "send",
                 "setgrent",
                 "sethostent",
                 "setnetent",
                 "setpgrp",
                 "setpriority",
                 "setprotoent",
                 "setpwent",
                 "setservent",
                 "setsockopt",
                 "shift",
                 "shmctl",
                 "shmget",
                 "shmread",
                 "shmwrite",
                 "shutdown",
                 "sin",
                 "sleep",
                 "socket",
                 "socketpair",
                 "sort",
                 "splice",
                 "split",
                 "sprintf",
                 "sqrt",
                 "srand",
                 "stat",
                 "state",
                 "study",
                 "sub",
                 "substr",
                 "symlink",
                 "syscall",
                 "sysopen",
                 "sysread",
                 "sysseek",
                 "system",
                 "syswrite",
                 "tell"
                 "telldir",
                 "tie",
                 "tied",
                 "time",
                 "times",
                 "tr",
                 "truncate",
                 "uc",
                 "ucfirst",
                 "umask",
                 "undef",
                 "unless",
                 "unlink",
                 "unpack",
                 "unshift",
                 "untie",
                 "until",
                 "use",
                 "utime",
                 "values",
                 "vec",
                 "wait",
                 "waitpid",
                 "wantarray",
                 "warn",
                 "when",
                 "while",
                 "write",
                 "xor",
                 "y"
                 ]
    
    def softchar_accept_matching_forward_slash(self, scimoz, pos, style_info, candidate):
        if pos == 0:
            return candidate
        currStyle = scimoz.getStyleAt(pos)
        if not currStyle in style_info._regex_styles:
            return None
        prevPos = scimoz.positionBefore(pos)
        if scimoz.getStyleAt(prevPos) != currStyle:
            # We're at the start of a regex.
            return candidate
        # Check for m/ or s/
        if pos >= 2:
            prev2Pos = scimoz.positionBefore(prevPos)
            if scimoz.getStyleAt(prev2Pos) == currStyle:
                return None
        leadChar = scimoz.getWCharAt(prevPos)
        if leadChar == 's':
            return "//"
        elif leadChar == 'm':
            return candidate
        return None
    
    def _is_special_variable(self, scimoz, pos, opStyle):
        if pos == 0:
            return False;
        prevPos = scimoz.positionBefore(pos)
        if scimoz.getStyleAt(prevPos) == opStyle and chr(scimoz.getCharAt(prevPos)) == '$':
            # In Perl $( and $[ have particular meanings
            return True
        return False

    def softchar_check_special_then_return_char(self, scimoz, pos, style_info, candidate):
        if self._is_special_variable(scimoz, pos,
                                     self.isUDL() and scimoz.SCE_UDL_SSL_VARIABLE or scimoz.SCE_PL_SCALAR):
            return None
        return candidate
    
    _is_alpha_re = re.compile(r'\w')
    def _atOpeningStringDelimiter(self, scimoz, pos, style_info):
        res = KoLanguageBase._atOpeningStringDelimiter(self, scimoz, pos, style_info)
        if res:
            return res
        # Look at Perl's special cases
        if pos < 4:
            return False
        # Look for a delim after the q-part
        prevPos = scimoz.positionBefore(pos)
        prevStyle = scimoz.getStyleAt(prevPos)
        if prevStyle not in style_info._string_styles:
            return False
        prevChar = scimoz.getWCharAt(prevPos)
        if self._is_alpha_re.match(prevChar):
            return False
        # Look for a char like rxw before delim
        prevPos = scimoz.positionBefore(prevPos)
        prevStyle = scimoz.getStyleAt(prevPos)
        if prevStyle not in style_info._string_styles:
            return False
        prevChar = scimoz.getWCharAt(prevPos)
        if prevChar not in "qwrx":
            return False
        
        # Look for a q
        prevPos = scimoz.positionBefore(prevPos)
        prevStyle = scimoz.getStyleAt(prevPos)
        if prevStyle in style_info._indent_open_styles:
            return prevChar == 'q'
        elif prevStyle not in style_info._string_styles:
            return False
        prev2Char = scimoz.getWCharAt(prevPos)
        if prev2Char != 'q':
            return False
        
        return self._atOpeningIndenter(scimoz, scimoz.positionBefore(prevPos), style_info)