#
# Helper functions for wxWindows bakefiles
#
# $Id$
#


import utils

# We use 'CFG' option in places where bakefile doesn't like it, so we must
# register a substitution function for it that provides additional knowledge
# about the option (in this case that it does not contain dir separators and
# so utils.nativePaths() doesn't have to do anything with it):
def __noopSubst(func, name):
    return '$(%s)' % name
utils.addSubstituteCallback('CFG', __noopSubst)
utils.addSubstituteCallback('LIBDIRNAME', __noopSubst)


def mk_wxid(id):
    """Creates wxWindows library identifier from bakefile target ID that
       follows this convention: DLLs end with 'dll', static libraries
       end with 'lib'. If withPrefix=1, then _wxid is returned instead
       of wxid."""
    if id.endswith('dll') or id.endswith('lib'):
        wxid = id[:-3]
    else:
        wxid = id
    return wxid


# All libs that are part of the main library (i.e. non-contrib):
MAIN_LIBS = ['mono', 'base', 'core', 'adv', 'html', 'xml', 'net', 'odbc']
# List of library names/ids for categories with different names:
LIBS_NOGUI = ['xml', 'net']
LIBS_GUI   = ['core', 'adv', 'html', 'gl', 'odbc']

def mkLibName(wxid):
    """Returns string that can be used as library name, including name
       suffixes, prefixes, version tags etc. This must be kept in sync
       with variables defined in common.bkl!"""
    if wxid == 'mono':
        return '$(WXNAMEPREFIXGUI)$(WXNAMESUFFIX)$(WXVERSIONTAG)$(HOST_SUFFIX)'
    if wxid == 'base':
        return '$(WXNAMEPREFIX)$(WXNAMESUFFIX)$(WXVERSIONTAG)$(HOST_SUFFIX)'
    if wxid in LIBS_NOGUI:
        return '$(WXNAMEPREFIX)$(WXNAMESUFFIX)_%s$(WXVERSIONTAG)$(HOST_SUFFIX)' % wxid
    return '$(WXNAMEPREFIXGUI)$(WXNAMESUFFIX)_%s$(WXVERSIONTAG)$(HOST_SUFFIX)' % wxid

def mkDllName(wxid):
    """Returns string that can be used as DLL name, including name
       suffixes, prefixes, version tags etc. This must be kept in sync
       with variables defined in common.bkl!"""
    if wxid == 'mono':
        return '$(WXDLLNAMEPREFIXGUI)$(WXNAMESUFFIX)$(WXCOMPILER)$(VENDORTAG)$(WXDLLVERSIONTAG)'
    if wxid == 'base':
        return '$(WXDLLNAMEPREFIX)$(WXNAMESUFFIX)$(WXCOMPILER)$(VENDORTAG)$(WXDLLVERSIONTAG)'
    if wxid in LIBS_NOGUI:
        return '$(WXDLLNAMEPREFIX)$(WXNAMESUFFIX)_%s$(WXCOMPILER)$(VENDORTAG)$(WXDLLVERSIONTAG)' % wxid
    return '$(WXDLLNAMEPREFIXGUI)$(WXNAMESUFFIX)_%s$(WXCOMPILER)$(VENDORTAG)$(WXDLLVERSIONTAG)' % wxid


def libToLink(wxlibname):
    """Returns string to pass to <sys-lib> when linking against 'wxlibname'.
       For one of main libraries, libToLink('foo') returns '$(WXLIB_FOO)' which
       must be defined in common.bkl as either nothing (in monolithic build) or
       mkLibName('foo') (otherwise).
       For contrib libraries, it returns mkDllName(wxlibname).       
       """
    if wxlibname in MAIN_LIBS:
        return '$(WXLIB_%s)' % wxlibname.upper()
    else:
        return mkLibName(wxlibname)


wxVersion = None
VERSION_FILE = '../../include/wx/version.h'

def getVersion():
    """Returns wxWindows version as a tuple: (major,minor,release)."""
    global wxVersion
    if wxVersion == None:
        f = open(VERSION_FILE, 'rt')
        lines = f.readlines()
        f.close()
        major = minor = release = None
        for l in lines:
            if not l.startswith('#define'): continue
            splitted = l.strip().split()
            if splitted[0] != '#define': continue
            if len(splitted) < 3: continue
            name = splitted[1]
            value = splitted[2]
            if value == None: continue
            if name == 'wxMAJOR_VERSION': major = int(value)
            if name == 'wxMINOR_VERSION': minor = int(value)
            if name == 'wxRELEASE_NUMBER': release = int(value)
            if major != None and minor != None and release != None:
                break
        wxVersion = (major, minor, release)
    return wxVersion

def getVersionMajor():
    return getVersion()[0]
def getVersionMinor():
    return getVersion()[1]
def getVersionRelease():
    return getVersion()[2]


def headersOnly(files):
    """Filters 'files' so that only headers are left. Used with
       <msvc-project-files> to add headers to VC++ projects but not files such
       as arrimpl.cpp."""
    
    def callback(cond, sources):
        prf = suf = ''
        if sources[0].isspace(): prefix=' '
        if sources[-1].isspace(): suffix=' '
        retval = []
        for s in sources.split():
            if s.endswith('.h'):
                retval.append(s)
        return '%s%s%s' % (prf, ' '.join(retval), suf)
    return utils.substitute2(files, callback)