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192 | import base64
from ....text.textstyle import TextStyle
from ....utils.geom import Rect, find_centroid
from .utils import apply_rotation
def set_font_from_style(xml, style):
if style.font is not None:
xml.set("font-family", style.font)
if style.size is not None:
xml.set("font-size", style.size)
s = ""
if style.color is not None:
s += "fill:{};".format(style.color)
if style.bold:
s += "font-weight: bold;"
if style.italic:
s += "font-style: italic;"
if s:
xml.set("style", s)
def set_paint_style(
xml, color=None, bg_color=None, stroke_width=None, stroke_dasharray=None
):
styles = []
if bg_color:
styles.append(f"fill:{bg_color}")
else:
styles.append("fill:none")
if color:
stroke_width = stroke_width or 1
styles.append(f"stroke:{color}")
styles.append(f"stroke-width:{stroke_width}")
if stroke_dasharray:
styles.append(f"stroke-dasharray:{stroke_dasharray}")
else:
styles.append("stroke:none")
xml.set("style", ";".join(styles))
def draw_text(
xml, x, y, parsed_text, style, styles, id=None, id_index=None, transform=None
):
assert isinstance(style, TextStyle)
xml.element("text")
if id is not None and id_index is None:
xml.set("id", id)
xml.set("x", x)
xml.set("y", y)
if transform is not None:
xml.set("transform", transform)
anchor = {"left": "start", "middle": "middle", "right": "end"}
xml.set("text-anchor", anchor[style.align])
set_font_from_style(xml, style)
line_size = style.size * style.line_spacing
active_styles = [style]
xml.element("tspan")
if style.variant_numeric:
xml.set("font-variant-numeric", style.variant_numeric)
for i, (token_type, value) in enumerate(parsed_text):
if token_type == "text":
xml.text(value)
elif token_type == "newline":
for _ in active_styles:
xml.close("tspan") # tspan
for j, s in enumerate(active_styles):
if s is None:
continue
xml.element("tspan")
xml.set("xml:space", "preserve")
if j == 0:
xml.set("x", x)
xml.set("dy", line_size * value)
set_font_from_style(xml, s)
elif token_type == "begin":
is_dummy = value and value[0] == "#"
s = styles.get(value, None)
if s is None and not is_dummy:
raise Exception("Style '{}' not found".format(value))
active_styles.append(s)
xml.element("tspan")
if id is not None and id_index == i:
xml.set("id", id)
xml.set("xml:space", "preserve")
if not is_dummy:
set_font_from_style(xml, s)
elif token_type == "end":
xml.close("tspan")
active_styles.pop()
else:
raise Exception("Invalid token")
for s in active_styles:
if s is not None:
xml.close("tspan")
xml.close("text")
def draw_bitmap(xml, x, y, width, height, mime, data, rotation=None, extra_args=None):
# TODO: improve
if not isinstance(data, str):
data = base64.b64encode(data).decode("ascii")
xml.element("image")
xml.set("x", x)
xml.set("y", y)
if width is not None:
xml.set("width", width)
if height is not None:
xml.set("height", height)
if rotation:
apply_rotation(xml, rotation, (x + width / 2, y + height / 2))
if extra_args is not None:
for k, v in extra_args:
xml.set(k, v)
xml.set("xlink:href", "data:{};base64,{}".format(mime, data), escape=False)
xml.close("image")
def draw_rect(xml, rect: Rect, rx=None, ry=None, rotation=None, **kwargs):
xml.element("rect")
xml.set("x", rect.x)
xml.set("y", rect.y)
xml.set("width", rect.width)
xml.set("height", rect.height)
if rx:
xml.set("rx", rx)
if ry:
xml.set("ry", ry)
if rotation:
apply_rotation(xml, rotation, rect.mid_point)
set_paint_style(xml, **kwargs)
xml.close("rect")
def draw_ellipse(xml, rect: Rect, rotation=None, **kwargs):
xml.element("ellipse")
xml.set("cx", rect.mid_x)
xml.set("cy", rect.mid_y)
xml.set("rx", rect.width / 2)
xml.set("ry", rect.height / 2)
if rotation:
apply_rotation(xml, rotation, rect.mid_point)
set_paint_style(xml, **kwargs)
xml.close("ellipse")
def draw_polygon(xml, points, rotation=None, **kwargs):
xml.element("polygon")
xml.set(
"points",
" ".join(f"{x},{y}" for x, y in points),
)
if rotation:
apply_rotation(xml, rotation, find_centroid(points))
set_paint_style(xml, **kwargs)
xml.close("polygon")
def draw_polyline(xml, points, **kwargs):
xml.element("polyline")
xml.set(
"points",
" ".join(f"{x},{y}" for x, y in points),
)
set_paint_style(xml, **kwargs)
xml.close("polyline")
def draw_path(xml, commands, **kwargs):
xml.element("path")
xml.set("d", " ".join(command_to_str(c) for c in commands))
set_paint_style(xml, **kwargs)
xml.close("path")
def command_to_str(command):
name, pairs = command
return name + " ".join("{},{}".format(p[0], p[1]) for p in pairs)
|
