Basic support for Type3 Fonts in Pdf + various refactorings

experimental/PdfViewer/SkPdfType0FontDictionary_autogen.h

-#ifndef __DEFINED__SkPdfType0FontDictionary
-#define __DEFINED__SkPdfType0FontDictionary
-
-#include "SkPdfEnums_autogen.h"
-#include "SkPdfArray_autogen.h"
-#include "SkPdfFontDictionary_autogen.h"
-
-// Entries in a Type 0 font dictionary
-class SkPdfType0FontDictionary : public SkPdfFontDictionary {
-public:
-  virtual SkPdfObjectType getType() const { return kType0FontDictionary_SkPdfObjectType;}
-  virtual SkPdfObjectType getTypeEnd() const { return kType0FontDictionary__End_SkPdfObjectType;}
-public:
-  virtual SkPdfType0FontDictionary* asType0FontDictionary() {return this;}
-  virtual const SkPdfType0FontDictionary* asType0FontDictionary() const {return this;}
-
-private:
-  virtual SkPdfCIDFontDictionary* asCIDFontDictionary() {return NULL;}
-  virtual const SkPdfCIDFontDictionary* asCIDFontDictionary() const {return NULL;}
-
-  virtual SkPdfType1FontDictionary* asType1FontDictionary() {return NULL;}
-  virtual const SkPdfType1FontDictionary* asType1FontDictionary() const {return NULL;}
-
-  virtual SkPdfMultiMasterFontDictionary* asMultiMasterFontDictionary() {return NULL;}
-  virtual const SkPdfMultiMasterFontDictionary* asMultiMasterFontDictionary() const {return NULL;}
-
-  virtual SkPdfTrueTypeFontDictionary* asTrueTypeFontDictionary() {return NULL;}
-  virtual const SkPdfTrueTypeFontDictionary* asTrueTypeFontDictionary() const {return NULL;}
-
-public:
-private:
-public:
-  SkPdfType0FontDictionary(const PdfMemDocument* podofoDoc = NULL, const PdfObject* podofoObj = NULL) : SkPdfFontDictionary(podofoDoc, podofoObj) {}
-
-  virtual bool valid() const {return true;}
-
-  SkPdfType0FontDictionary& operator=(const SkPdfType0FontDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
-
-/** (Required) The type of PDF object that this dictionary describes; must be
- *  Font for a font dictionary.
-**/
-  bool has_Type() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Type", "", NULL));
-  }
-
-  std::string Type() const {
-    std::string ret;
-    if (NameFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Type", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return "";
-  }
-
-/** (Required) The type of font; must be Type0 for a Type 0 font.
-**/
-  bool has_Subtype() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Subtype", "", NULL));
-  }
-
-  std::string Subtype() const {
-    std::string ret;
-    if (NameFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Subtype", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return "";
-  }
-
-/** (Required) The PostScript name of the font. In principle, this is an arbitrary
- *  name, since there is no font program associated directly with a Type 0 font
- *  dictionary. The conventions described here ensure maximum compatibility
- *  with existing Acrobat products.
- *  If the descendant is a Type 0 CIDFont, this name should be the concatenation
- *  of the CIDFont's BaseFont name, a hyphen, and the CMap name given in the
- *  Encoding entry (or the CMapName entry in the CMap program itself). If the
- *  descendant is a Type 2 CIDFont, this name should be the same as the
- *  CIDFont's BaseFont name.
-**/
-  bool has_BaseFont() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "BaseFont", "", NULL));
-  }
-
-  std::string BaseFont() const {
-    std::string ret;
-    if (NameFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "BaseFont", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return "";
-  }
-
-/** (Required) The name of a predefined CMap, or a stream containing a CMap
- *  program, that maps character codes to font numbers and CIDs. If the descen-
- *  dant is a Type 2 CIDFont whose associated TrueType font program is not em-
- *  bedded in the PDF file, the Encoding entry must be a predefined CMap name
- *  (see "Glyph Selection in CIDFonts" on page 339).
-**/
-  bool has_Encoding() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Encoding", "", NULL));
-  }
-
-  bool isEncodingAName() const {
-    SkPdfObject* ret = NULL;
-    if (!ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Encoding", "", &ret)) return false;
-    return ret->podofo()->GetDataType() == ePdfDataType_Name;
-  }
-
-  std::string getEncodingAsName() const {
-    std::string ret = "";
-    if (NameFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Encoding", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return "";
-  }
-
-  bool isEncodingAStream() const {
-    SkPdfObject* ret = NULL;
-    if (!ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Encoding", "", &ret)) return false;
-    return ret->podofo()->HasStream();
-  }
-
-  SkPdfStream* getEncodingAsStream() const {
-    SkPdfStream* ret = NULL;
-    if (StreamFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Encoding", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return NULL;
-  }
-
-/** (Required) An array specifying one or more fonts or CIDFonts that are
- *  descendants of this composite font. This array is indexed by the font number
- *  that is obtained by mapping a character code through the CMap specified in
- *  the Encoding entry.
- *  Note: In all PDF versions up to and including PDF 1.4, DescendantFonts must
- *  be a one-element array containing a CIDFont dictionary.
-**/
-  bool has_DescendantFonts() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "DescendantFonts", "", NULL));
-  }
-
-  SkPdfArray DescendantFonts() const {
-    SkPdfArray ret;
-    if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "DescendantFonts", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return SkPdfArray();
-  }
-
-/** (Optional) A stream containing a CMap file that maps character codes to
- *  Unicode values (see Section 5.9, "ToUnicode CMaps").
-**/
-  bool has_ToUnicode() const {
-    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ToUnicode", "", NULL));
-  }
-
-  SkPdfStream* ToUnicode() const {
-    SkPdfStream* ret;
-    if (StreamFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ToUnicode", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return NULL;
-  }
-
-};
-
-#endif  // __DEFINED__SkPdfType0FontDictionary