Basic support for Type3 Fonts in Pdf + various refactorings

experimental/PdfViewer/autogen/SkPdfType1FontDictionary_autogen.h

+#ifndef __DEFINED__SkPdfType1FontDictionary
+#define __DEFINED__SkPdfType1FontDictionary
+
+#include "SkPdfUtils.h"
+#include "SkPdfEnums_autogen.h"
+#include "SkPdfArray_autogen.h"
+#include "SkPdfFontDictionary_autogen.h"
+
+// Entries in a Type 1 font dictionary
+class SkPdfType1FontDictionary : public SkPdfFontDictionary {
+public:
+  virtual SkPdfObjectType getType() const { return kType1FontDictionary_SkPdfObjectType;}
+  virtual SkPdfObjectType getTypeEnd() const { return kType1FontDictionary__End_SkPdfObjectType;}
+public:
+  virtual SkPdfType1FontDictionary* asType1FontDictionary() {return this;}
+  virtual const SkPdfType1FontDictionary* asType1FontDictionary() const {return this;}
+
+private:
+  virtual SkPdfCIDFontDictionary* asCIDFontDictionary() {return NULL;}
+  virtual const SkPdfCIDFontDictionary* asCIDFontDictionary() const {return NULL;}
+
+  virtual SkPdfType0FontDictionary* asType0FontDictionary() {return NULL;}
+  virtual const SkPdfType0FontDictionary* asType0FontDictionary() const {return NULL;}
+
+public:
+private:
+public:
+  SkPdfType1FontDictionary(const PdfMemDocument* podofoDoc = NULL, const PdfObject* podofoObj = NULL) : SkPdfFontDictionary(podofoDoc, podofoObj) {}
+
+  SkPdfType1FontDictionary(const SkPdfType1FontDictionary& from) : SkPdfFontDictionary(from.fPodofoDoc, from.fPodofoObj) {}
+
+  virtual bool valid() const {return true;}
+
+  SkPdfType1FontDictionary& operator=(const SkPdfType1FontDictionary& 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 Type1 for a Type 1 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 in PDF 1.0; optional otherwise) The name by which this font is ref-
+ *  erenced in the Font subdictionary of the current resource dictionary.
+ *  Note: This entry is obsolescent and its use is no longer recommended. (See
+ *  implementation note 42 in Appendix H.)
+**/
+  bool has_Name() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Name", "", NULL));
+  }
+
+  std::string Name() const {
+    std::string ret;
+    if (NameFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Name", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return "";
+  }
+
+/** (Required) The PostScript name of the font. For Type 1 fonts, this is usually
+ *  the value of the FontName entry in the font program; for more information,
+ *  see Section 5.2 of the PostScript Language Reference, Third Edition. The Post-
+ *  Script name of the font can be used to find the font's definition in the viewer
+ *  application or its environment. It is also the name that will be used when
+ *  printing to a PostScript output device.
+**/
+  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 except for the standard 14 fonts) The first character code defined in
+ *  the font's Widths array.
+**/
+  bool has_FirstChar() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "FirstChar", "", NULL));
+  }
+
+  long FirstChar() const {
+    long ret;
+    if (LongFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "FirstChar", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return 0;
+  }
+
+/** (Required except for the standard 14 fonts) The last character code defined in
+ *  the font's Widths array.
+**/
+  bool has_LastChar() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "LastChar", "", NULL));
+  }
+
+  long LastChar() const {
+    long ret;
+    if (LongFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "LastChar", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return 0;
+  }
+
+/** (Required except for the standard 14 fonts; indirect reference preferred) An array
+ *  of (LastChar - FirstChar + 1) widths, each element being the glyph width for
+ *  the character whose code is FirstChar plus the array index. For character
+ *  codes outside the range FirstChar to LastChar, the value of MissingWidth from
+ *  the FontDescriptor entry for this font is used. The glyph widths are measured
+ *  in units in which 1000 units corresponds to 1 unit in text space. These widths
+ *  must be consistent with the actual widths given in the font program itself.
+ *  (See implementation note 43 in Appendix H.) For more information on
+ *  glyph widths and other glyph metrics, see Section 5.1.3, "Glyph Positioning
+ *  and Metrics."
+**/
+  bool has_Widths() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Widths", "", NULL));
+  }
+
+  SkPdfArray* Widths() const {
+    SkPdfArray* ret;
+    if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Widths", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return NULL;
+  }
+
+/** (Required except for the standard 14 fonts; must be an indirect reference) A font
+ *  descriptor describing the font's metrics other than its glyph widths (see Sec-
+ *  tion 5.7, "Font Descriptors").
+ *     Note: For the standard 14 fonts, the entries FirstChar, LastChar, Widths, and
+ *     FontDescriptor must either all be present or all absent. Ordinarily, they are ab-
+ *     sent; specifying them enables a standard font to be overridden (see "Standard
+ *     Type 1 Fonts," below).
+**/
+  bool has_FontDescriptor() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "FontDescriptor", "", NULL));
+  }
+
+  SkPdfDictionary* FontDescriptor() const {
+    SkPdfDictionary* ret;
+    if (DictionaryFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "FontDescriptor", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return NULL;
+  }
+
+/** (Optional) A specification of the font's character encoding, if different from
+ *  its built-in encoding. The value of Encoding may be either the name of a pre-
+ *  defined encoding (MacRomanEncoding, MacExpertEncoding, or WinAnsi-
+ *  Encoding, as described in Appendix D) or an encoding dictionary that
+ *  specifies differences from the font's built-in encoding or from a specified pre-
+ *  defined encoding (see Section 5.5.5, "Character Encoding").
+**/
+  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 isEncodingADictionary() const {
+    SkPdfObject* ret = NULL;
+    if (!ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Encoding", "", &ret)) return false;
+    return ret->podofo()->GetDataType() == ePdfDataType_Dictionary;
+  }
+
+  SkPdfDictionary* getEncodingAsDictionary() const {
+    SkPdfDictionary* ret = NULL;
+    if (DictionaryFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Encoding", "", &ret)) return ret;
+    // TODO(edisonn): warn about missing required field, assert for known good pdfs
+    return NULL;
+  }
+
+/** (Optional; PDF 1.2) 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__SkPdfType1FontDictionary