def test_layout_setting_text(self):
layout = Layout(self.pango_context)
layout.set_text('Hi from Παν語')
assert layout.get_text() == 'Hi from Παν語'
layout.set_markup('<span font="italic 30">Hello from Παν語</span>')
assert layout.get_text() == 'Hello from Παν語'
def render_cluster_glyph_items(
ctx: cairocffi.Context,
layout: pangocffi.Layout
):
"""
Renders each cluster within a layout with a unique rotation and color.
Warning: Does not support bidirectional text.
:param ctx:
a Cairo context
:param layout:
a Pango layout
"""
layout_run_iter = layout.get_iter()
layout_cluster_iter = layout.get_iter()
layout_text = layout.get_text()
alternate = False
while True:
layout_run = layout_run_iter.get_run()
layout_line_baseline = layout_run_iter.get_baseline()
if layout_run is None:
if not layout_run_iter.next_run():
break
continue
clusters = get_clusters_from_glyph_item(layout_run, layout_text)
for cluster in clusters:
cluster_extents = layout_cluster_iter.get_cluster_extents()[1]
layout_cluster_iter.next_cluster()
alternate = not alternate
ctx.set_source_rgba(0.5, 0, 1 if alternate else 0.5, 0.9)
ctx.save()
ctx.translate(
pangocffi.units_to_double(cluster_extents.x),
pangocffi.units_to_double(layout_line_baseline)
)
ctx.rotate(-0.05 if alternate else 0.05)
pangocairocffi.show_glyph_item(
ctx,
layout_text,
cluster
)
ctx.restore()
if not layout_run_iter.next_run():
break
def __init__(self, line_string: LineString, layout: Layout):
if layout.get_line_count() > 1:
raise ValueError('layout cannot be more than one line.')
self._layout = layout
self._input_line_string = line_string
self._layout_text = layout.get_text()
self._alignment = Alignment.LEFT
self._start_offset = 0
self._vertical_offset = 0
self._side = Side.LEFT
self._layout_clusters = LayoutClusters(self._layout)
self._layout_engine_class = SvgLayoutEngine
self._layout_engine = None
def render_run_glyph_items(
ctx: cairocffi.Context,
layout: pangocffi.Layout
) -> None:
"""
Renders each layout run within a layout with a unique rotation and color.
:param ctx:
a Cairo context
:param layout:
a Pango layout
"""
layout_iter = layout.get_iter()
layout_text = layout.get_text()
alternate = False
while True:
layout_run = layout_iter.get_run()
layout_run_extents = layout_iter.get_run_extents()[1]
layout_line_baseline = layout_iter.get_baseline()
if layout_run is None:
if not layout_iter.next_run():
break
continue
alternate = not alternate
ctx.set_source_rgba(0, 0.5, 1 if alternate else 0.5, 0.9)
ctx.save()
ctx.translate(
pangocffi.units_to_double(layout_run_extents.x),
pangocffi.units_to_double(layout_line_baseline)
)
ctx.rotate(0.05 if alternate else -0.05)
pangocairocffi.show_glyph_item(ctx, layout_text, layout_run)
ctx.restore()
if not layout_iter.next_run():
break
