diff options
Diffstat (limited to 'gerbonara/utils.py')
| -rw-r--r-- | gerbonara/utils.py | 70 |
1 files changed, 65 insertions, 5 deletions
diff --git a/gerbonara/utils.py b/gerbonara/utils.py index bc571b6..db5ccca 100644 --- a/gerbonara/utils.py +++ b/gerbonara/utils.py @@ -95,6 +95,19 @@ class LengthUnit: return unit.convert_from(self, value) + def convert_bounds_from(self, unit, value): + """ :py:meth:`.LengthUnit.convert_from` but for ((min_x, min_y), (max_x, max_y)) bounding box tuples. """ + + if value is None: + return None + + (min_x, min_y), (max_x, max_y) = value + min_x = self.convert_from(unit, min_x) + min_y = self.convert_from(unit, min_y) + max_x = self.convert_from(unit, max_x) + max_y = self.convert_from(unit, max_y) + return (min_x, min_y), (max_x, max_y) + def format(self, value): """ Return a human-readdable string representing value in this unit. @@ -235,7 +248,7 @@ def max_none(a, b): def add_bounds(b1, b2): - """ Add/union two bounding boxes. + """ Add/union multiple bounding boxes. :param tuple b1: ``((min_x, min_y), (max_x, max_y))`` :param tuple b2: ``((min_x, min_y), (max_x, max_y))`` @@ -244,10 +257,28 @@ def add_bounds(b1, b2): :rtype: tuple """ - (min_x_1, min_y_1), (max_x_1, max_y_1) = b1 - (min_x_2, min_y_2), (max_x_2, max_y_2) = b2 - min_x, min_y = min_none(min_x_1, min_x_2), min_none(min_y_1, min_y_2) - max_x, max_y = max_none(max_x_1, max_x_2), max_none(max_y_1, max_y_2) + return sum_bounds((b1, b2)) + + +def sum_bounds(bounds, *, default=None): + """ Add/union multiple bounding boxes. + + :param bounds: each arg is one bounding box in ``((min_x, min_y), (max_x, max_y))`` format + + :returns: ``((min_x, min_y), (max_x, max_y))`` + :rtype: tuple + """ + + if not bounds: + return default + + ((min_x, min_y), (max_x, max_y)), *bounds = bounds + + for (min_x_2, min_y_2), (max_x_2, max_y_2) in bounds: + min_x, min_y = min_none(min_x, min_x_2), min_none(min_y, min_y_2) + max_x, max_y = max_none(max_x, max_x_2), max_none(max_y, max_y_2) + print('sum_bounds +{', (min_x_2, min_y_2), (max_x_2, max_y_2), '} = ', ((min_x, min_y), (max_x, max_y))) + return ((min_x, min_y), (max_x, max_y)) @@ -400,3 +431,32 @@ def svg_arc(old, new, center, clockwise): def svg_rotation(angle_rad, cx=0, cy=0): return f'rotate({float(math.degrees(angle_rad)):.4} {float(cx):.6} {float(cy):.6})' +def setup_svg(tags, bounds, margin=0, arg_unit=MM, svg_unit=MM, pagecolor='white', tag=Tag): + (min_x, min_y), (max_x, max_y) = bounds + + if margin: + margin = svg_unit(margin, arg_unit) + min_x -= margin + min_y -= margin + max_x += margin + max_y += margin + print(f'setting up document {bounds=} {margin=}') + + w, h = max_x - min_x, max_y - min_y + w = 1.0 if math.isclose(w, 0.0) else w + h = 1.0 if math.isclose(h, 0.0) else h + + view = tag('sodipodi:namedview', [], id='namedview1', pagecolor=pagecolor, + inkscape__document_units=svg_unit.shorthand) + + svg_unit = 'in' if svg_unit == 'inch' else 'mm' + # TODO export apertures as <uses> where reasonable. + return tag('svg', [view, *tags], + width=f'{w}{svg_unit}', height=f'{h}{svg_unit}', + viewBox=f'{min_x} {min_y} {w} {h}', + xmlns="http://www.w3.org/2000/svg", + xmlns__xlink="http://www.w3.org/1999/xlink", + xmlns__sodipodi='http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd', + xmlns__inkscape='http://www.inkscape.org/namespaces/inkscape', + root=True) + |