From ca1cb8c942f01b8b70bf344c00d770c4867dfc32 Mon Sep 17 00:00:00 2001
From: Rasmus Andersson <rasmus@notion.se>
Date: Fri, 31 Aug 2018 22:21:09 -0700
Subject: tooling

---
 misc/kerndiff/getKerningPairsFromUFO.py | 144 ++++++++++++++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 misc/kerndiff/getKerningPairsFromUFO.py

(limited to 'misc/kerndiff/getKerningPairsFromUFO.py')

diff --git a/misc/kerndiff/getKerningPairsFromUFO.py b/misc/kerndiff/getKerningPairsFromUFO.py
new file mode 100644
index 000000000..47e986006
--- /dev/null
+++ b/misc/kerndiff/getKerningPairsFromUFO.py
@@ -0,0 +1,144 @@
+#!/usr/bin/python
+# coding: utf-8
+#
+# Copyright (c) 2013-2016 Adobe Systems Incorporated. All rights reserved.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import sys, os, itertools
+
+
+class UFOkernReader(object):
+
+    def __init__(self, font, includeZero=False):
+        self.f = font
+        self.group_group_pairs = {}
+        self.group_glyph_pairs = {}
+        self.glyph_group_pairs = {}
+        self.glyph_glyph_pairs = {}
+
+        self.allKerningPairs = self.makePairDicts(includeZero)
+        self.output = self.makeOutput(self.allKerningPairs)
+
+        self.totalKerning = sum(self.allKerningPairs.values())
+        self.absoluteKerning = sum([abs(value) for value in self.allKerningPairs.values()])
+
+    def makeOutput(self, kerningDict):
+        output = []
+        for (left, right), value in kerningDict.items():
+            output.append('/%s /%s %s' % (left, right, value))
+        output.sort()
+        return output
+
+    def allCombinations(self, left, right):
+        leftGlyphs = self.f.groups.get(left, [left])
+        rightGlyphs = self.f.groups.get(right, [right])
+        combinations = list(itertools.product(leftGlyphs, rightGlyphs))
+        return combinations
+
+    def makePairDicts(self, includeZero):
+        kerningPairs = {}
+
+        for (left, right), value in self.f.kerning.items():
+
+            if '@' in left and '@' in right:
+                # group-to-group-pair
+                for combo in self.allCombinations(left, right):
+                    self.group_group_pairs[combo] = value
+
+            elif '@' in left and '@' not in right:
+                # group-to-glyph-pair
+                for combo in self.allCombinations(left, right):
+                    self.group_glyph_pairs[combo] = value
+
+            elif '@' not in left and '@' in right:
+                # glyph-to-group-pair
+                for combo in self.allCombinations(left, right):
+                    self.glyph_group_pairs[combo] = value
+
+            else:
+                # glyph-to-glyph-pair a.k.a. single pair
+                self.glyph_glyph_pairs[(left, right)] = value
+
+        # The updates occur from the most general pairs to the most specific.
+        # This means that any given class kerning values are overwritten with
+        # the intended exceptions.
+        kerningPairs.update(self.group_group_pairs)
+        kerningPairs.update(self.group_glyph_pairs)
+        kerningPairs.update(self.glyph_group_pairs)
+        kerningPairs.update(self.glyph_glyph_pairs)
+
+        if includeZero is False:
+            # delete any kerning values == 0.
+            # This cannot be done in the previous loop, since exceptions
+            # might set a previously established kerning pair to be 0.
+            cleanKerningPairs = dict(kerningPairs)
+            for pair in kerningPairs:
+                if kerningPairs[pair] == 0:
+                    del cleanKerningPairs[pair]
+            return cleanKerningPairs
+
+        else:
+            return kerningPairs
+
+
+def run(font):
+    ukr = UFOkernReader(font, includeZero=True)
+    print('\n'.join(sorted(ukr.output)))
+    # scrap = os.popen('pbcopy', 'w')
+    # output = '\n'.join(ukr.output)
+    # scrap.write(output)
+    # scrap.close()
+
+    if inRF:
+        pass
+        # print('Total length of kerning:', ukr.totalKerning)
+
+    # if inCL:
+    #     print('\n'.join(ukr.output), '\n')
+
+    # print('Total amount of kerning pairs:', len(ukr.output))
+    # print('List of kerning pairs copied to clipboard.')
+
+
+if __name__ == '__main__':
+    inRF = False
+    inCL = False
+
+    try:
+        import mojo
+        inRF = True
+        f = CurrentFont()
+        if f:
+            run(f)
+        else:
+            print(u'You need to open a font first. \U0001F625')
+
+    except ImportError:
+        try:
+            import defcon
+            inCL = True
+            path = os.path.normpath(sys.argv[-1])
+            if os.path.splitext(path)[-1] in ['.ufo', '.UFO']:
+                f = defcon.Font(path)
+                run(f)
+            else:
+                print('No UFO file given.')
+        except ImportError:
+            print(u'You don’t have Defcon installed. \U0001F625')
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