text: # 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.
  
  
  import re
  from anchors import alignComponentsToAnchors
  from string import find
  
  def parseComposite(composite):
      c = composite.split("=")
      d = c[1].split("/")
      glyphName = d[0]
      if len(d) == 1:
          offset = [0,0]
      else:
          offset = [int(i) for i in d[1].split(",")]
      accentString = c[0]
      accents = accentString.split("+")
      baseName = accents.pop(0)
      accentNames = [i.split(":") for i in accents ]
      return (glyphName, baseName, accentNames, offset)
  
  
  def copyMarkAnchors(f, g, srcname, width):
      unicode_range = range(0x0030, 0x02B0) + range(0x1E00, 0x1EFF)
      anchors = f[srcname].anchors
      for anchor in anchors:
          if "top_dd" == anchor.name:
              g.appendAnchor(anchor.name, (anchor.x + width, anchor.y))
          if "bottom_dd" == anchor.name:
              g.appendAnchor(anchor.name, (anchor.x + width, anchor.y))
          if "top0315" == anchor.name:
              g.appendAnchor(anchor.name, (anchor.x + width, anchor.y))
          if "top" == anchor.name:
              if g.unicode == None:
                  if not g.name.endswith(('.ccmp', '.smcp', '.NAV')):
                      continue                
              if False == (g.unicode in unicode_range):
                  if not g.name.endswith(('.ccmp', '.smcp', '.NAV')):
                      continue
              #if g.unicode > 0x02B0:
              #    continue
              parenttop_present = 0
              for anc in g.anchors:
                  if anc.name == "parent_top":
                      parenttop_present = 1
              if 0 == parenttop_present:
                  g.appendAnchor("parent_top", anchor.position)
  
          if "bottom" == anchor.name:
              if g.unicode == None:
                  if -1 == find(g.name, ".smcp"):
                      continue
              if False == (g.unicode in unicode_range):
                  if -1 == find(g.name, ".smcp"):
                      continue
              #if g.unicode > 0x02B0:
              #    continue
              bottom_present = 0
              for anc in g.anchors:
                  if anc.name == "bottom":
                      bottom_present = 1
              if 0 == bottom_present:
                  g.appendAnchor("bottom", anchor.position)
  
  
  #            g.appendAnchor("top", anchor.position)
              
   #       if "rhotichook" == anchor.name:
   #           g.appendAnchor(anchor.name, (anchor.x + width, anchor.y))
   
      #print g.anchors
      for anchor in g.anchors:
          if "top" == anchor.name:
              #print g.name, g.anchors
              return
   
      anchor_parent_top = None
  
      for anchor in g.anchors:
          if "parent_top" == anchor.name:
              anchor_parent_top = anchor
              break
  
      if anchor_parent_top is not None:
          g.appendAnchor("top", anchor_parent_top.position)
  
  
  def generateGlyph(f,gname,glyphList={}):
      glyphName, baseName, accentNames, offset = parseComposite(gname)
  
      if baseName.find("_") != -1:
          g = f.newGlyph(glyphName)
          for componentName in baseName.split("_"):
              g.appendComponent(componentName, (g.width, 0))
              g.width += f[componentName].width
              setUnicodeValue(g, glyphList)
  
      else: 
          if not f.has_key(glyphName):
              try:
                  f.compileGlyph(glyphName, baseName, accentNames)
              except KeyError as e:
                  print ("KeyError raised for composition rule '%s', likely %s "
                      "anchor not found in glyph '%s'" % (gname, e, baseName))
                  return
              g = f[glyphName]
              setUnicodeValue(g, glyphList)
              copyMarkAnchors(f, g, baseName, offset[1] + offset[0])
              if offset[0] != 0 or offset[1] != 0:
                  g.width += offset[1] + offset[0]
                  g.move((offset[0], 0), anchors=False)
              if len(accentNames) > 0:
                  alignComponentsToAnchors(f, glyphName, baseName, accentNames)
          else:
              print ("Existing glyph '%s' found in font, ignoring composition "
                  "rule '%s'" % (glyphName, gname))
  
  
  def setUnicodeValue(glyph, glyphList):
      """Try to ensure glyph has a unicode value -- used by FDK to make OTFs."""
  
      if glyph.name in glyphList:
          glyph.unicode = int(glyphList[glyph.name], 16)
      else:
          uvNameMatch = re.match("uni([\dA-F]{4})$", glyph.name)
          if uvNameMatch:
              glyph.unicode = int(uvNameMatch.group(1), 16)
  