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boundsPen: add 'ignoreSinglePoints' argument to do like robofab.pens.boundsPen

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if `ignoreSinglePoints` is True, single points are excluded from the computation of the bounds.
The default value (False) keeps the current behaviour (i.e., single points are not ignored).

https://github.com/robofab-developers/robofab/blob/master/Lib/robofab/pens/boundsPen.py

See discussion at: https://github.com/typemytype/booleanOperations/pull/20
This commit is contained in:
Cosimo Lupo 2016-01-07 15:47:31 +00:00
parent 4daf0601b2
commit dc2ef2e341
1 changed files with 21 additions and 4 deletions
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25
Lib/fontTools/pens/boundsPen.py
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@ -17,25 +17,39 @@ class ControlBoundsPen(BasePen):
When the shape has been drawn, the bounds are available as the
'bounds' attribute of the pen object. It's a 4-tuple:
(xMin, yMin, xMax, yMax)
(xMin, yMin, xMax, yMax).
If 'ignoreSinglePoints' is True, single points are ignored.
"""
def __init__(self, glyphSet):
def __init__(self, glyphSet, ignoreSinglePoints=False):
BasePen.__init__(self, glyphSet)
self.ignoreSinglePoints = ignoreSinglePoints
self.bounds = None
self._start = None
def _moveTo(self, pt):
self._start = pt
if not self.ignoreSinglePoints:
self._addMoveTo()
def _addMoveTo(self):
if self._start is None:
return
bounds = self.bounds
if bounds:
self.bounds = updateBounds(bounds, pt)
self.bounds = updateBounds(bounds, self._start)
else:
x, y = pt
x, y = self._start
self.bounds = (x, y, x, y)
self._start = None
def _lineTo(self, pt):
self._addMoveTo()
self.bounds = updateBounds(self.bounds, pt)
def _curveToOne(self, bcp1, bcp2, pt):
self._addMoveTo()
bounds = self.bounds
bounds = updateBounds(bounds, bcp1)
bounds = updateBounds(bounds, bcp2)
@ -43,6 +57,7 @@ class ControlBoundsPen(BasePen):
self.bounds = bounds
def _qCurveToOne(self, bcp, pt):
self._addMoveTo()
bounds = self.bounds
bounds = updateBounds(bounds, bcp)
bounds = updateBounds(bounds, pt)
@ -62,6 +77,7 @@ class BoundsPen(ControlBoundsPen):
"""
def _curveToOne(self, bcp1, bcp2, pt):
self._addMoveTo()
bounds = self.bounds
bounds = updateBounds(bounds, pt)
if not pointInRect(bcp1, bounds) or not pointInRect(bcp2, bounds):
@ -70,6 +86,7 @@ class BoundsPen(ControlBoundsPen):
self.bounds = bounds
def _qCurveToOne(self, bcp, pt):
self._addMoveTo()
bounds = self.bounds
bounds = updateBounds(bounds, pt)
if not pointInRect(bcp, bounds):