85 lines
1.8 KiB
Python
85 lines
1.8 KiB
Python
def _PreferNonZero(*args):
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for arg in args:
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if arg != 0:
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return arg
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return 0
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# TODO float movement
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class PathBuilder(object):
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def __init__(self):
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self.pathes = []
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def StartPath(self):
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self.pathes.append('')
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def EndPath(self):
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self._Add('z')
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def _Add(self, path_snippet):
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path = self.pathes[-1]
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if path:
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path += ' ' + path_snippet
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else:
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path = path_snippet
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self.pathes[-1] = path
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def _move(self, c, x, y):
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self._Add('%s%d,%d' % (c, x, y))
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def M(self, x, y):
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self._move('M', x, y)
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def m(self, x, y):
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self._move('m', x, y)
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def _arc(self, c, rx, ry, x, y):
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self._Add('%s%d,%d 0 0 1 %d,%d' % (c, rx, ry, x, y))
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def A(self, rx, ry, x, y):
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self._arc('A', rx, ry, x, y)
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def a(self, rx, ry, x, y):
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self._arc('a', rx, ry, x, y)
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def _vhline(self, c, x):
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self._Add('%s%d' % (c, x))
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def H(self, x):
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self._vhline('H', x)
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def h(self, x):
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self._vhline('h', x)
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def V(self, y):
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self._vhline('V', y)
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def v(self, x):
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self._vhline('v', y)
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def Rect(self, rect):
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# TODO what format(s) do these #s come in?
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x = float(rect.attrib.get('x', 0))
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y = float(rect.attrib.get('y', 0))
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w = float(rect.attrib.get('width'))
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h = float(rect.attrib.get('height'))
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rx = float(rect.attrib.get('rx', 0))
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ry = float(rect.attrib.get('ry', 0))
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rx = _PreferNonZero(rx, ry)
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ry = _PreferNonZero(ry, rx)
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# TODO there are more rules for adjusting rx, ry
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self.StartPath()
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self.M(x + rx, y)
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self.H(x + w -rx)
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if rx > 0:
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self.A(rx, ry, x + w, y + ry)
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self.V(y + h -ry)
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if rx > 0:
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self.A(rx, ry, x + w - rx, y + h)
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self.H(x + rx)
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if rx > 0:
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self.A(rx, ry, x, y + h - ry)
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self.V(y + ry)
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if rx > 0:
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self.A(rx, ry, x + rx, y)
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self.EndPath()
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