def create_layout(text, style, hinting, max_width):
"""Return an opaque Pango layout with default Pango line-breaks.
:param text: Unicode
:param style: a :class:`StyleDict` of computed values
:param hinting: whether to enable text hinting or not
:param max_width:
The maximum available width in the same unit as ``style.font_size``,
or ``None`` for unlimited width.
"""
if hinting:
dummy_context = cairo.Context(cairo.ImageSurface(
cairo.FORMAT_ARGB32, 1, 1))
else:
# None as a the target for PDFSurface is new in pycairo 1.8.8.
# BytesIO() helps with compat with earlier versions:
dummy_file = BytesIO()
dummy_context = cairo.Context(cairo.PDFSurface(dummy_file, 1, 1))
layout = create_pango_layout(dummy_context)
font = Pango.FontDescription()
assert not isinstance(style.font_family, basestring), (
'font_family should be a list')
font.set_family(','.join(style.font_family))
font.set_variant(PANGO_VARIANT[style.font_variant])
font.set_style(PANGO_STYLE[style.font_style])
font.set_stretch(PANGO_STRETCH[style.font_stretch])
font.set_absolute_size(units_from_double(style.font_size))
font.set_weight(style.font_weight)
layout.set_font_description(font)
layout.set_wrap(PANGO_WRAP_WORD)
set_text(layout, text)
# Make sure that max_width * Pango.SCALE == max_width * 1024 fits in a
# signed integer. Treat bigger values same as None: unconstrained width.
if max_width is not None and max_width < 2 ** 21:
layout.set_width(units_from_double(max_width))
word_spacing = style.word_spacing
letter_spacing = style.letter_spacing
if letter_spacing == 'normal':
letter_spacing = 0
if text and (word_spacing != 0 or letter_spacing != 0):
word_spacing = units_from_double(word_spacing)
letter_spacing = units_from_double(letter_spacing)
markup = escape(text).replace(
' ', '<span letter_spacing="%i"> </span>' % (
word_spacing + letter_spacing,))
markup = '<span letter_spacing="%i">%s</span>' % (
letter_spacing, markup)
layout.set_attributes(parse_markup(markup))
return layout
def create_layout(text, style, hinting, max_width):
"""Return an opaque Pango object to be passed to other functions
in this module.
:param text: Unicode
:param style: a :class:`StyleDict` of computed values
:param hinting: whether to enable text hinting or not
:param max_width:
The maximum available width in the same unit as ``style.font_size``,
or ``None`` for unlimited width.
"""
layout = create_pango_layout(
HINTED_DUMMY_CONTEXT if hinting else NON_HINTED_DUMMY_CONTEXT)
font = Pango.FontDescription()
assert not isinstance(style.font_family, basestring), (
'font_family should be a list')
font.set_family(','.join(style.font_family))
font.set_variant(PANGO_VARIANT[style.font_variant])
font.set_style(PANGO_STYLE[style.font_style])
font.set_stretch(PANGO_STRETCH[style.font_stretch])
font.set_absolute_size(units_from_double(style.font_size))
font.set_weight(style.font_weight)
layout.set_font_description(font)
layout.set_wrap(PANGO_WRAP_WORD)
set_text(layout, text)
# Make sure that max_width * Pango.SCALE == max_width * 1024 fits in a
# signed integer. Treat bigger values same as None: unconstrained width.
if max_width is not None and max_width < 2**21:
layout.set_width(units_from_double(max_width))
word_spacing = style.word_spacing
letter_spacing = style.letter_spacing
if letter_spacing == 'normal':
letter_spacing = 0
if text and (word_spacing != 0 or letter_spacing != 0):
word_spacing = units_from_double(word_spacing)
letter_spacing = units_from_double(letter_spacing)
markup = escape(text).replace(
' ', '<span letter_spacing="%i"> </span>' % (
word_spacing + letter_spacing,))
markup = '<span letter_spacing="%i">%s</span>' % (
letter_spacing, markup)
layout.set_attributes(parse_markup(markup))
return layout
def create_layout(text, style, hinting, max_width):
"""Return an opaque Pango object to be passed to other functions
in this module.
:param text: Unicode
:param style: a :class:`StyleDict` of computed values
:param hinting: whether to enable text hinting or not
:param max_width:
The maximum available width in the same unit as ``style.font_size``,
or ``None`` for unlimited width.
"""
layout = create_pango_layout(
HINTED_DUMMY_CONTEXT if hinting else NON_HINTED_DUMMY_CONTEXT)
font = Pango.FontDescription()
assert not isinstance(style.font_family,
basestring), ('font_family should be a list')
font.set_family(','.join(style.font_family))
font.set_variant(PANGO_VARIANT[style.font_variant])
font.set_style(PANGO_STYLE[style.font_style])
font.set_stretch(PANGO_STRETCH[style.font_stretch])
font.set_absolute_size(units_from_double(style.font_size))
font.set_weight(style.font_weight)
layout.set_font_description(font)
layout.set_wrap(PANGO_WRAP_WORD)
set_text(layout, text)
# Make sure that max_width * Pango.SCALE == max_width * 1024 fits in a
# signed integer. Treat bigger values same as None: unconstrained width.
if max_width is not None and max_width < 2**21:
layout.set_width(units_from_double(max_width))
word_spacing = style.word_spacing
letter_spacing = style.letter_spacing
if letter_spacing == 'normal':
letter_spacing = 0
if text and (word_spacing != 0 or letter_spacing != 0):
word_spacing = units_from_double(word_spacing)
letter_spacing = units_from_double(letter_spacing)
markup = escape(text).replace(
' ', '<span letter_spacing="%i"> </span>' %
(word_spacing + letter_spacing, ))
markup = '<span letter_spacing="%i">%s</span>' % (letter_spacing,
markup)
layout.set_attributes(parse_markup(markup))
return layout