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authorDaniel Baumann <daniel.baumann@progress-linux.org>2023-03-02 20:01:10 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2023-03-02 20:01:10 +0000
commitda875fcb62c801b8d19b3d4d984ad963574fb356 (patch)
tree3d85503747c56c2a387b291524442946f4bebb73 /lib/silfont/ipython.py
parentInitial commit. (diff)
downloadpysilfont-da875fcb62c801b8d19b3d4d984ad963574fb356.tar.xz
pysilfont-da875fcb62c801b8d19b3d4d984ad963574fb356.zip
Adding upstream version 1.6.0.upstream/1.6.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/silfont/ipython.py')
-rw-r--r--lib/silfont/ipython.py135
1 files changed, 135 insertions, 0 deletions
diff --git a/lib/silfont/ipython.py b/lib/silfont/ipython.py
new file mode 100644
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+++ b/lib/silfont/ipython.py
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+#!/usr/bin/python
+'IPython support for fonttools'
+
+__all__ = ['displayGlyphs', 'loadFont', 'displayText', 'displayRaw']
+
+from fontTools import ttLib
+from fontTools.pens.basePen import BasePen
+from fontTools.misc import arrayTools
+from IPython.display import SVG, HTML
+from defcon import Font
+from ufo2ft import compileTTF
+
+class SVGPen(BasePen) :
+
+ def __init__(self, glyphSet, scale=1.0) :
+ super(SVGPen, self).__init__(glyphSet);
+ self.__commands = []
+ self.__scale = scale
+
+ def __str__(self) :
+ return " ".join(self.__commands)
+
+ def scale(self, pt) :
+ return ((pt[0] or 0) * self.__scale, (pt[1] or 0) * self.__scale)
+
+ def _moveTo(self, pt):
+ self.__commands.append("M {0[0]} {0[1]}".format(self.scale(pt)))
+
+ def _lineTo(self, pt):
+ self.__commands.append("L {0[0]} {0[1]}".format(self.scale(pt)))
+
+ def _curveToOne(self, pt1, pt2, pt3) :
+ self.__commands.append("C {0[0]} {0[1]} {1[0]} {1[1]} {2[0]} {2[1]}".format(self.scale(pt1), self.scale(pt2), self.scale(pt3)))
+
+ def _closePath(self) :
+ self.__commands.append("Z")
+
+ def clear(self) :
+ self.__commands = []
+
+def _svgheader():
+ return '''<?xml version="1.0"?>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1">
+'''
+
+def _bbox(f, gnames, points, scale=1):
+ gset = f.glyphSet
+ bbox = (0, 0, 0, 0)
+ for i, gname in enumerate(gnames):
+ if hasattr(points, '__len__') and i == len(points):
+ points.append((bbox[2] / scale, 0))
+ pt = points[i] if i < len(points) else (0, 0)
+ g = gset[gname]._glyph
+ if g is None or not hasattr(g, 'xMin') :
+ gbox = (0, 0, 0, 0)
+ else :
+ gbox = (g.xMin * scale, g.yMin * scale, g.xMax * scale, g.yMax * scale)
+ bbox = arrayTools.unionRect(bbox, arrayTools.offsetRect(gbox, pt[0] * scale, pt[1] * scale))
+ return bbox
+
+glyphsetcount = 0
+def _defglyphs(f, gnames, scale=1):
+ global glyphsetcount
+ glyphsetcount += 1
+ gset = f.glyphSet
+ p = SVGPen(gset, scale)
+ res = "<defs><g>\n"
+ for gname in sorted(set(gnames)):
+ res += '<symbol overflow="visible" id="{}_{}">\n'.format(gname, glyphsetcount)
+ g = gset[gname]
+ p.clear()
+ g.draw(p)
+ res += '<path style="stroke:none;" d="' + str(p) + '"/>\n</symbol>\n'
+ res += "</g></defs>\n"
+ return res
+
+def loadFont(fname):
+ if fname.lower().endswith(".ufo"):
+ ufo = Font(fname)
+ f = compileTTF(ufo)
+ else:
+ f = ttLib.TTFont(fname)
+ return f
+
+def displayGlyphs(f, gnames, points=None, scale=None):
+ if not hasattr(gnames, '__len__') or isinstance(gnames, basestring):
+ gnames = [gnames]
+ if not hasattr(points, '__len__'):
+ points = []
+ if not hasattr(f, 'glyphSet'):
+ f.glyphSet = f.getGlyphSet()
+ res = _svgheader()
+ if points is None:
+ points = []
+ bbox = _bbox(f, gnames, points, scale or 1)
+ maxh = 100.
+ height = bbox[3] - (bbox[1] if bbox[1] < 0 else 0)
+ if scale is None and height > maxh:
+ scale = maxh / height
+ bbox = [x * scale for x in bbox]
+ res += _defglyphs(f, gnames, scale)
+ res += '<g id="surface1" transform="matrix(1,0,0,-1,{},{})">\n'.format(-bbox[0], bbox[3])
+ res += ' <rect x="{}" y="{}" width="{}" height="{}" style="fill:white;stroke:none"/>\n'.format(
+ bbox[0], bbox[1], bbox[2]-bbox[0], bbox[3])
+ res += ' <g style="fill:black">\n'
+ for i, gname in enumerate(gnames):
+ pt = points[i] if i < len(points) else (0, 0)
+ res += ' <use xlink:href="#{0}_{3}" x="{1}" y="{2}"/>\n'.format(gname, pt[0] * scale, pt[1] * scale, glyphsetcount)
+ res += ' </g></g>\n</svg>\n'
+ return SVG(data=res)
+ #return res
+
+def displayText(f, text, features = [], lang=None, dir="", script="", shapers="", size=0):
+ import harfbuzz
+ glyphs = harfbuzz.shape_text(f, text, features, lang, dir, script, shapers)
+ gnames = []
+ points = []
+ x = 0
+ y = 0
+ for g in glyphs:
+ gnames.append(f.getGlyphName(g.gid))
+ points.append((x+g.offset[0], y+g.offset[1]))
+ x += g.advance[0]
+ y += g.advance[1]
+ if size == 0:
+ scale = None
+ else:
+ upem = f['head'].unitsPerEm
+ scale = 4. * size / (upem * 3.)
+ return displayGlyphs(f, gnames, points, scale=scale)
+
+def displayRaw(text):
+ # res = "<html><body>"+text.encode('utf-8')+"</body></html>"
+ res = u"<html><body><p>"+text+u"</p></body></html>"
+ return HTML(data=res)