def test_equal(self):
a = AttrList()
b = a.copy()
try:
assert a == b
except AttributeError:
warnings.warn(("AttrList can't be compared."
"Pango version more that 1.46.0 is required."))
with self.assertRaises(NotImplementedError):
assert a == 2
def test_set_attributes(self):
context = Context()
layout = Layout(context)
layout.set_text("Working?")
attr = Attribute.from_size(5, 1, 4)
attr_list = AttrList()
attr_list.insert(attr)
layout.set_attributes(attr_list)
layout.get_attributes()
# Resetting the attributes
layout.set_attributes(None)
layout.get_attributes()
def test_copy(self):
a = AttrList()
b = copy.copy(a)
try:
assert a == b
except AttributeError:
warnings.warn(("AttrList can't be compared."
"Pango version more that 1.46.0 is required."))
c = copy.deepcopy(a)
try:
assert a == c
except AttributeError:
warnings.warn(("AttrList can't be compared."
"Pango version more that 1.46.0 is required."))
def test_from_pointer(self):
a = AttrList()
a.copy()
b = AttrList.from_pointer(a.get_pointer())
try:
assert a == b
except AttributeError:
warnings.warn(("AttrList can't be compared."
"Pango version more that 1.46.0 is required."))
def get_text_and_attributes(parsed_text, style: TextStyle, styles,
text_scale: float) -> Tuple[str, AttrList]:
attr_list = AttrList()
base_style = [styles["default"].compose(style)]
start = 0
text = ""
def push_attrs(style, start_index, end_index):
for attr in style_to_attributes(style, text_scale, start_index,
end_index):
attr_list.insert(attr)
def active_style():
return [style for style in reversed(base_style)
if style is not None][0]
line = ""
for (token, value) in parsed_text:
if token == "text":
line += value
text += value
elif token == "newline":
for _ in range(value):
if not line:
# This fixes the height of empty lines
text += INVISIBLE_SPACE
text += "\n"
line = ""
elif token == "begin":
push_attrs(active_style(), start, byte_length(text))
start = byte_length(text)
if value.startswith("#"):
base_style.append(None)
else:
base_style.append(active_style().compose(styles[value]))
elif token == "end":
push_attrs(active_style(), start, byte_length(text))
start = byte_length(text)
base_style.pop()
if start < byte_length(text):
push_attrs(base_style[0], start, byte_length(text))
assert len(base_style) == 1
assert base_style[0] is not None
return text, attr_list
def test_init(self):
a = AttrList()
a.get_pointer()
def test_splice(self):
# Idk how this works
# copied from
# https://gitlab.gnome.org/GNOME/pango/-/blob/master/tests/testattributes.c#L249
base = AttrList()
attr = Attribute.from_size(10, 0, -1)
base.insert(attr)
list = base.copy()
other = AttrList()
list.splice(other, 11, 5)
list = base.copy()
other = AttrList()
attr = Attribute.from_size(20)
attr.start_index = 0
attr.end_index = 3
other.insert(attr)
attr1 = Attribute.from_stretch(Stretch.SEMI_CONDENSED)
attr1.start_index = 2
attr1.end_index = 4
other.insert(attr1)
list.splice(other, 11, 5)
def test_change(self):
a = AttrList()
b = Attribute.from_size(5, 1, 6)
a.change(b)
def test_insert(self):
a = AttrList()
b = Attribute.from_size(5, 1, 4)
a.insert(b)
c = Attribute.from_foreground_alpha(6, 2, 4)
a.insert_before(c)
def test_ref_and_unref(self):
a = AttrList()
a._ref()
a._unref()
def test_attr_list_returns_null_from_null_pointer(self):
with self.assertRaises(ValueError):
AttrList.from_pointer(ffi.NULL)
def test_attributes():
width = 150
height = 50
# CFFIs and Contexts
context_creator = ContextCreator.create_pdf(
'tests/acceptance/output/attributes.pdf', width, height)
pangocairo = context_creator.pangocairo
cairo_context = context_creator.cairo_context
text = 'Hi from Παν語! This test is to make sure that text is correctly ' \
'annotated, and to also highlight functionality that is not ' \
'available from methods like pango.set_markup(\'...\'). ' \
'For instance, Attribute.from_shape() allows you to embed a ' \
'picture or a widget in a layout. Example: Ø.'
text_utf8 = text.encode('utf-8')
# Using pangocairocffi, this would be `pangocairocffi.create_layout()` with
# a cairocffi context object.
layout = Layout.from_pointer(
pangocairo.pango_cairo_create_layout(cairo_context))
layout.set_width(pangocffi.units_from_double(width * 72 / 25.4))
layout.set_text(text)
attr_list = AttrList()
# Example: Handling byte indexes correctly.
# When handling byte indexes, make sure to always use UTF-8 byte strings.
# For example , while the string '語' has a length of 1 character in
# python, in a UTF-8 byte string this is 3 bytes: `0xe8 0xaa 0x9e`. Pango
# will not like byte indexes that occur in the middle of a character.
text_to_match = 'Παν語!'.encode('utf-8')
match_index = text_utf8.index(text_to_match)
match_index_end = match_index + len(text_to_match)
attr_list.insert(
Attribute.from_style(Style.ITALIC, match_index, match_index_end))
# Example: Color alpha
# `set_markup()` doesn't appear to have the ability to control color
# alphas, but it is supported by Attributes! Note that the alpha color for
# underline and foreground text cannot be controlled separately.
text_to_match = 'correctly'.encode('utf-8')
match_index = text_utf8.index(text_to_match)
match_index_end = match_index + len(text_to_match)
attr_list.insert(
Attribute.from_underline(Underline.ERROR, match_index,
match_index_end))
attr_list.insert(
Attribute.from_foreground_color(65535, 0, 0, match_index,
match_index_end))
attr_list.insert(
Attribute.from_underline_color(0, 0, 65535, match_index,
match_index_end))
attr_list.insert(
Attribute.from_background_color(0, 65535, 0, match_index,
match_index_end))
attr_list.insert(
Attribute.from_foreground_alpha(32768, match_index, match_index_end))
attr_list.insert(
Attribute.from_background_alpha(8192, match_index, match_index_end))
# Example: Highlight multiple Monospace texts
markup_texts = ('pango.set_markup(\'...\')', 'Attribute.from_shape()')
for markup_text in markup_texts:
text_to_match = markup_text.encode('utf-8')
match_index = text_utf8.index(text_to_match)
match_index_end = match_index + len(text_to_match)
attr_list.insert(
Attribute.from_family('monospace', match_index, match_index_end))
# Example: Shape placeholders
# `Attribute.from_shape()` can be used to insert a box within the layout.
# In this case, we're inserting a 1cm square that sits on the baseline of
# the final line. Note the negative y coordinate of the rectangle.
# Visually, the background color will appear a bit larger, that's because
# it will also apply a background below the baseline of the font.
# Once rendered, it should be possible to retrieve the position of the
# shape using using LayoutIter so that an actual image can be rendered in
# place should you need to.
text_to_match = 'Ø'.encode('utf-8')
match_index = text_utf8.index(text_to_match)
match_index_end = match_index + len(text_to_match)
glyph_length = pangocffi.units_from_double(10 * 72 / 25.4) # 10 mm
ink = Rectangle(width=glyph_length,
height=glyph_length,
x=0,
y=-glyph_length)
logical = Rectangle(width=glyph_length,
height=glyph_length,
x=0,
y=-glyph_length)
attr_list.insert(
Attribute.from_background_color(65535, 0, 0, match_index,
match_index_end))
attr_list.insert(
Attribute.from_background_alpha(8192, match_index, match_index_end))
attr_list.insert(
Attribute.from_shape(ink, logical, match_index, match_index_end))
# Apply all the attributes to the layout
layout.set_attributes(attr_list)
# Using pangocairocffi, this would be `pangocairocffi.show_layout(layout)`
pangocairo.pango_cairo_show_layout(cairo_context, layout.get_pointer())
context_creator.close()