Initial public commit

misc/pylib/fontbuild/anchors.py

@@ -0,0 +1,77 @@
+# Copyright 2015 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+def getGlyph(gname, font):
+    return font[gname] if font.has_key(gname) else None
+
+
+def getComponentByName(f, g, componentName):
+    for c in g.components:
+        if c.baseGlyph == componentName:
+            return c
+
+def getAnchorByName(g,anchorName):
+    for a in g.anchors:
+        if a.name == anchorName:
+            return a
+
+def moveMarkAnchors(f, g, anchorName, accentName, dx, dy):
+    if "top"==anchorName:
+        anchors = f[accentName].anchors
+        for anchor in anchors:
+            if "mkmktop_acc" == anchor.name:
+                for anc in g.anchors:
+                    if anc.name == "top":
+                        g.removeAnchor(anc)
+                        break
+                g.appendAnchor("top", (anchor.x + int(dx), anchor.y + int(dy)))
+ 
+    elif anchorName in ["bottom", "bottomu"]:
+        anchors = f[accentName].anchors
+        for anchor in anchors:
+            if "mkmkbottom_acc" == anchor.name:
+                for anc in g.anchors:
+                    if anc.name == "bottom":
+                        g.removeAnchor(anc)
+                        break
+                x = anchor.x + int(dx)
+                for anc in anchors:
+                    if "top" == anc.name:
+                        x = anc.x + int(dx)
+                g.appendAnchor("bottom", (x, anchor.y + int(dy)))
+
+
+def alignComponentToAnchor(f,glyphName,baseName,accentName,anchorName):
+    g = getGlyph(glyphName,f)
+    base = getGlyph(baseName,f)
+    accent = getGlyph(accentName,f)
+    if g == None or base == None or accent == None:
+        return
+    a1 = getAnchorByName(base,anchorName)
+    a2 = getAnchorByName(accent,"_" + anchorName)
+    if a1 == None or a2 == None:
+        return
+    offset = (a1.x - a2.x, a1.y - a2.y)
+    c = getComponentByName(f, g, accentName)
+    c.offset = offset
+    moveMarkAnchors(f, g, anchorName, accentName, offset[0], offset[1])
+
+
+def alignComponentsToAnchors(f,glyphName,baseName,accentNames):
+    for a in accentNames:
+        if len(a) == 1:
+            continue
+        alignComponentToAnchor(f,glyphName,baseName,a[0],a[1])
+