Basic support for Type3 Fonts in Pdf + various refactorings

experimental/PdfViewer/autogen/SkPdfType0FontDictionary_autogen.h

+#ifndef __DEFINED__SkPdfType0FontDictionary
+#define __DEFINED__SkPdfType0FontDictionary
+
+#include "SkPdfUtils.h"
+#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 (SkPdfObjectType)(kType0FontDictionary_SkPdfObjectType + 1);}
+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;}
+
+  virtual SkPdfType3FontDictionary* asType3FontDictionary() {return NULL;}
+  virtual const SkPdfType3FontDictionary* asType3FontDictionary() const {return NULL;}
+
+public:
+private:
+public:
+  SkPdfType0FontDictionary(const PdfMemDocument* podofoDoc = NULL, const PdfObject* podofoObj = NULL) : SkPdfFontDictionary(podofoDoc, podofoObj) {}
+
+  SkPdfType0FontDictionary(const SkPdfType0FontDictionary& from) : SkPdfFontDictionary(from.fPodofoDoc, from.fPodofoObj) {}
+
+  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 NULL;
+  }
+
+/** (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