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# :Author: John Wiggins
# :Copyright: 2011, Enthought, Inc.
# :License: BSD Style
include "CoreFoundation.pxi"
include "CoreGraphics.pxi"
include "CoreText.pxi"
cdef object _cf_string_to_pystring(CFStringRef cf_string):
cdef char* c_string
cdef char buf[256]
c_string = CFStringGetCStringPtr(cf_string, kCFStringEncodingMacRoman)
if c_string == NULL:
success = CFStringGetCString(cf_string, buf, 256,
kCFStringEncodingMacRoman)
retval = str(buf)
else:
retval = str(c_string)
return retval
cdef CFArrayRef _get_system_fonts():
cdef CFIndex value = 1
cdef CFNumberRef cf_number
cdef CFMutableDictionaryRef cf_options_dict
cdef CTFontCollectionRef cf_font_collection
cdef CFArrayRef cf_font_descriptors
cf_options_dict = CFDictionaryCreateMutable(NULL, 0,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks)
if cf_options_dict != NULL:
cf_number = CFNumberCreate(NULL, kCFNumberCFIndexType, &value)
CFDictionaryAddValue(cf_options_dict, <void*>kCTFontCollectionRemoveDuplicatesOption,
<void*>cf_number)
CFRelease(cf_number)
else:
msg = "unknown error building options dictionary for font list"
raise RuntimeError(msg)
cf_font_collection = CTFontCollectionCreateFromAvailableFonts(cf_options_dict)
CFRelease(cf_options_dict)
cf_font_descriptors = CTFontCollectionCreateMatchingFontDescriptors(cf_font_collection)
CFRelease(cf_font_collection)
return cf_font_descriptors
cdef class CTFont:
cdef CTFontRef ct_font
def __cinit__(self, *args, **kwargs):
self.ct_font = NULL
def __dealloc__(self):
if self.ct_font != NULL:
CFRelease(self.ct_font)
cpdef size_t get_pointer(self):
return <size_t>self.ct_font
cdef set_pointer(self, CTFontRef pointer):
self.ct_font = pointer
cdef class CTFontStyle:
cdef CTFontDescriptorRef ct_font_descriptor
cdef CFDictionaryRef attribute_dictionary
cdef readonly object family_name
cdef readonly object style
def __cinit__(self, *args, **kwargs):
self.ct_font_descriptor = NULL
self.attribute_dictionary = NULL
def __dealloc__(self):
if self.attribute_dictionary != NULL:
CFRelease(self.attribute_dictionary)
if self.ct_font_descriptor != NULL:
CFRelease(self.ct_font_descriptor)
def __init__(self, name, style='regular'):
self.family_name = name
self.style = style
self.attribute_dictionary = self._build_attribute_dictionary(name, style)
self.ct_font_descriptor = CTFontDescriptorCreateWithAttributes(self.attribute_dictionary)
def get_descent_ascent(self, object text):
""" Get the descent and ascent font metrics for a given string of text.
"""
cdef CTFontRef ct_font
cdef float ascent, descent
ct_font = CTFontCreateWithFontDescriptor(self.ct_font_descriptor, 0.0, NULL)
ascent = CTFontGetAscent(ct_font)
descent = CTFontGetDescent(ct_font)
CFRelease(ct_font)
return descent, ascent
def get_font(self, float font_size):
""" Get a CTFont matching the descriptor at the given size.
"""
cdef CTFontRef ct_font
ct_font = CTFontCreateWithFontDescriptor(self.ct_font_descriptor,
font_size, NULL)
font = CTFont()
font.set_pointer(ct_font)
return font
property postcript_name:
def __get__(self):
cdef CFStringRef cf_ps_name
cf_ps_name = <CFStringRef>CTFontDescriptorCopyAttribute(self.ct_font_descriptor,
kCTFontNameAttribute)
retval = _cf_string_to_pystring(cf_ps_name)
CFRelease(cf_ps_name)
return retval
cdef CFDictionaryRef _build_attribute_dictionary(self, name, style):
cdef CFStringRef cf_name, cf_style
cdef CFMutableDictionaryRef cf_dict
mac_name = name.strip().encode('utf-8')
cf_name = CFStringCreateWithCString(NULL, mac_name,
kCFStringEncodingUTF8)
style = style.title()
mac_style = style.strip().encode('utf-8')
cf_style = CFStringCreateWithCString(NULL, mac_style,
kCFStringEncodingUTF8)
cf_dict = CFDictionaryCreateMutable(NULL, 0,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks)
if cf_dict != NULL:
CFDictionaryAddValue(cf_dict, <void*>kCTFontFamilyNameAttribute, cf_name)
CFDictionaryAddValue(cf_dict, <void*>kCTFontStyleNameAttribute, cf_style)
else:
msg = "unknown error building descriptor dictionary for font %r"%mac_name
raise RuntimeError(msg)
CFRelease(cf_name)
CFRelease(cf_style)
return cf_dict
cdef class FontLookup:
cdef readonly object cache
cdef public object default_font
def lookup(self, name=None, style='regular'):
return CTFontStyle(name or self.default_font, style)
def names(self):
cdef CFIndex idx, count
cdef CFStringRef cf_fam_name
cdef CFArrayRef cf_font_descriptors
cdef CTFontDescriptorRef cf_font_descriptor
cf_font_descriptors = _get_system_fonts()
families = []
count = CFArrayGetCount(cf_font_descriptors)
for idx from 0 <= idx < count:
cf_font_descriptor = <CTFontDescriptorRef>CFArrayGetValueAtIndex(cf_font_descriptors, idx)
cf_fam_name = <CFStringRef>CTFontDescriptorCopyAttribute(cf_font_descriptor,
kCTFontFamilyNameAttribute)
families.append(_cf_string_to_pystring(cf_fam_name))
CFRelease(cf_fam_name)
CFRelease(cf_font_descriptors)
families.sort()
return list(set(families))
def styles(self, font_name):
raise NotImplementedError
def list_fonts(self):
for name in self.names():
print name, self.styles(name)
default_font_info = FontLookup()
default_font_info.default_font = 'Helvetica'
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