generate code for pdf viewer (initial draft)

experimental/PdfViewer/generate_code.py

+import sys
+
+class PdfName:
+  def __init__(self, name, abr=''):
+    self.fName = name
+    self.fAbr = abr
+
+class PdfInteger:
+  def __init__(self, value):
+    self.fValue = value
+
+class PdfReal:
+  def __init__(self, value):
+    self.fValue = value
+
+class PdfString:
+  def __init__(self, value):
+    self.fValue = value
+
+class PdfBoolean:
+  def __init__(self, value):
+    self.fValue = value
+
+class PdfField:
+  def __init__(self, parent, name, abr):
+    self.fParent = parent
+    self.fName = name
+    self.fAbr = abr
+    
+    self.fDefault = ''
+    self.fType = ''
+
+  def must(self, value):
+    return self.fParent
+    
+  def default(self, value):
+    self.fDefault = value
+    return self
+    
+  def number(self):
+    self.fType = 'number'
+    return self
+    
+  def integer(self):
+    self.fType = 'integer'
+    return self
+
+  def real(self):
+    self.fType = 'real'
+    return self
+
+  def name(self):
+    self.fType = 'name'
+    return self
+    
+  def string(self):
+    self.fType = 'string'
+    return self
+    
+  def multiple(self, options):
+    self.fType = 'multiple'
+    self.fOptions = options
+    return self
+    
+  def done(self):
+    return self.fParent
+
+
+class PdfClassField:
+  def __init__(self, parent, required):
+    self.fFields = []
+    self.fIncludes = []
+    self.fCC = []
+    self.fParent = parent
+    self.fRequired = required
+    
+  def hasField(self, name, abr=''):
+    return PdfField(self, name, abr)
+    
+  def done(self):
+    return self.fParent
+
+class PdfClass:
+  def __init__(self, name, base):
+    self.fFields = []
+    self.fIncludes = []
+    self.fCC = []
+    self.fName = name
+    self.fBase = base
+    
+  def required(self):
+    field = PdfClassField(self, True)
+    self.fFields.append(field)
+    return field
+    
+  def optional(self):
+    field = PdfClassField(self, False)
+    self.fFields.append(field)
+    return field
+    
+  def include(self, path):
+    self.fIncludes.append(path)
+    return self
+    
+  def carbonCopy(self, cc):
+    self.fCC.append(cc)
+    return self 
+
+class PdfClassManager:
+  def __init__(self):
+    self.fClasses = []
+
+  def addClass(self, name, base=''):
+    cls = PdfClass(name, base)
+    self.fClasses.append(cls)
+    return cls
+  
+  def write(self):
+    return
+
+def generateCode():
+  all = PdfClassManager()
+  
+  all.addClass('Object')
+  all.addClass('Null')
+  all.addClass('Boolean')
+  all.addClass('Integer')
+  all.addClass('Real')
+  all.addClass('Name')
+  all.addClass('Stream')
+  all.addClass('Reference')
+  all.addClass('Array')
+  all.addClass('Dictionary')
+
+  all.addClass('XObject', 'Dictionary').required().hasField('/Type').must('/XObject')
+  
+  all.addClass('Image', 'XObject').required().hasField('/Type').must('/XObject').done()\
+                                  .required().hasField('/Subtype').must('/Image').done()\
+                                  .required().hasField('/Width', '/W').integer().done().done()\
+                                  .required().hasField('/Height', '/H').integer().done().done()\
+                                  .required().hasField('/ColorSpace').multiple([PdfName('/DeviceRGB', '/RGB'), PdfName('/DeviceGray', '/Gray')])\
+                                                                                .done()\
+                                                                     .done()\
+                                  .optional().hasField('/BitsPerComponent', '/BPC').multiple([PdfInteger(1), PdfInteger(2), PdfInteger(4), PdfInteger(8)])\
+                                                                                   .default(PdfInteger(1))\
+                                                                                   .done().done()\
+                                  .carbonCopy('SkBitmap bitmap;')
+
+  all.addClass('Form', 'XObject').required().hasField('/Type').must('/XObject').done()\
+                                 .required().hasField('/Subtype').must('/Form').done()
+
+
+  all.write()
+  
+  return 1
+
+if '__main__' == __name__:
+  sys.exit(generateCode())