def text2svg(self):
"""Internally used function.
Convert the text to SVG using Pango
"""
size = self.size * 10
line_spacing = self.line_spacing * 10
dir_name = config.get_dir("text_dir")
disable_liga = self.disable_ligatures
if not os.path.exists(dir_name):
os.makedirs(dir_name)
hash_name = self.text2hash()
file_name = os.path.join(dir_name, hash_name) + ".svg"
if os.path.exists(file_name):
return file_name
surface = cairocffi.SVGSurface(file_name, 600, 400)
context = cairocffi.Context(surface)
context.move_to(START_X, START_Y)
settings = self.text2settings()
offset_x = 0
last_line_num = 0
layout = pangocairocffi.create_layout(context)
layout.set_width(pangocffi.units_from_double(600))
for setting in settings:
family = setting.font
style = self.str2style(setting.slant)
weight = self.str2weight(setting.weight)
text = self.text[setting.start : setting.end].replace("\n", " ")
fontdesc = pangocffi.FontDescription()
fontdesc.set_size(pangocffi.units_from_double(size))
if family:
fontdesc.set_family(family)
fontdesc.set_style(style)
fontdesc.set_weight(weight)
layout.set_font_description(fontdesc)
if setting.line_num != last_line_num:
offset_x = 0
last_line_num = setting.line_num
context.move_to(
START_X + offset_x, START_Y + line_spacing * setting.line_num
)
pangocairocffi.update_layout(context, layout)
if disable_liga:
text = escape(text)
layout.set_markup(f"<span font_features='liga=0'>{text}</span>")
else:
layout.set_text(text)
logger.debug(f"Setting Text {text}")
pangocairocffi.show_layout(context, layout)
offset_x += pangocffi.units_to_double(layout.get_size()[0])
surface.finish()
return file_name
def render_text(self, content: FormattedText, width):
fontn = pango.FontDescription()
fontn.set_family(content.font_family)
fontn.set_size(pango.units_from_double(content.font_size))
self.pango_context.set_font_description(fontn)
layout = pango.layout.Layout(self.pango_context)
layout.set_text(content.text)
if content.alignment == 'l':
layout.set_alignment(pango.Alignment.LEFT)
elif content.alignment == 'c':
layout.set_alignment(pango.Alignment.CENTER)
elif content.alignment == 'r':
layout.set_alignment(pango.Alignment.RIGHT)
layout.set_width(pango.units_from_double(width))
pc.update_layout(self.cairo_context, layout)
pc.show_layout(self.cairo_context, layout)