def _show_layout_baseline(
context: cairocffi.Context,
layout: pangocffi.Layout
):
layout_iter = layout.get_iter()
context.set_line_width(0.5)
context.set_dash([1, 1])
while True:
extents = layout_iter.get_line_extents()
baseline = layout_iter.get_baseline()
y_ranges = layout_iter.get_line_yrange()
context.set_source_rgba(1, 0, 0, 0.9)
context.move_to(
pangocffi.units_to_double(extents[0].x),
pangocffi.units_to_double(y_ranges[0])
)
context.line_to(
pangocffi.units_to_double(extents[0].x + extents[0].width),
pangocffi.units_to_double(y_ranges[0])
)
context.stroke()
context.set_source_rgba(0, 1, 0, 0.9)
context.stroke()
context.move_to(
pangocffi.units_to_double(extents[0].x),
pangocffi.units_to_double(baseline)
)
context.line_to(
pangocffi.units_to_double(extents[0].x + extents[0].width),
pangocffi.units_to_double(baseline)
)
context.stroke()
context.set_source_rgba(0, 0, 1, 0.9)
context.move_to(
pangocffi.units_to_double(extents[0].x),
pangocffi.units_to_double(y_ranges[1])
)
context.line_to(
pangocffi.units_to_double(extents[0].x + extents[0].width),
pangocffi.units_to_double(y_ranges[1])
)
context.stroke()
if not layout_iter.next_run():
break
def _show_layout_line_logical_extents(
context: cairocffi.Context,
layout: pangocffi.Layout
):
layout_iter = layout.get_iter()
context.set_line_width(0.5)
context.set_dash([1, 1])
alternate = True
while True:
alternate = not alternate
extents = layout_iter.get_line_extents()
context.set_source_rgba(0, 0, 1 if alternate else 0.5, 0.9)
_rectangle_path(context, extents[1])
context.stroke()
_coordinate_path(context, (extents[1].x, extents[1].y))
context.fill()
if not layout_iter.next_run():
break
def _show_layout_y_ranges(
context: cairocffi.Context,
layout: pangocffi.Layout
):
layout_iter = layout.get_iter()
context.set_line_width(0.5)
context.set_dash([1, 1])
alternate = True
while True:
alternate = not alternate
extents = layout_iter.get_line_extents()
y_ranges = layout_iter.get_line_yrange()
context.set_source_rgba(0, 0, 1 if alternate else 0.5, 0.9)
context.move_to(
pangocffi.units_to_double(extents[0].x),
pangocffi.units_to_double(y_ranges[0])
)
context.line_to(
pangocffi.units_to_double(extents[0].x + extents[0].width),
pangocffi.units_to_double(y_ranges[0])
)
context.stroke()
context.move_to(
pangocffi.units_to_double(extents[0].x),
pangocffi.units_to_double(y_ranges[1])
)
context.line_to(
pangocffi.units_to_double(extents[0].x + extents[0].width),
pangocffi.units_to_double(y_ranges[1])
)
context.stroke()
if not layout_iter.next_run():
break
