Restructuring of PdfViewer code.

experimental/PdfViewer/inc/SkPdfTokenLooper.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPdfTokenLooper_DEFINED
 #define SkPdfTokenLooper_DEFINED
 
+#include "SkPdfNativeTokenizer.h"
+// For SkPdfResult
+#include "SkPdfUtils.h"
+
 class SkCanvas;
-class SkPdfNativeTokenizer;
 class SkPdfContext;
 
-class PdfTokenLooper {
+class SkPdfTokenLooper {
 protected:
-    PdfTokenLooper* fParent;
+    SkPdfTokenLooper* fParent;
     SkPdfNativeTokenizer* fTokenizer;
     SkPdfContext* fPdfContext;
     SkCanvas* fCanvas;
 
 public:
-    PdfTokenLooper(PdfTokenLooper* parent,
+    SkPdfTokenLooper(SkPdfTokenLooper* parent,
                    SkPdfNativeTokenizer* tokenizer,
                    SkPdfContext* pdfContext,
                    SkCanvas* canvas)
         : fParent(parent), fTokenizer(tokenizer), fPdfContext(pdfContext), fCanvas(canvas) {}
 
-    virtual ~PdfTokenLooper() {}
+    virtual ~SkPdfTokenLooper() {}
 
     virtual SkPdfResult consumeToken(PdfToken& token) = 0;
     virtual void loop() = 0;
 
-    void setUp(PdfTokenLooper* parent) {
+    void setUp(SkPdfTokenLooper* parent) {
         fParent = parent;
         fTokenizer = parent->fTokenizer;
         fPdfContext = parent->fPdfContext;
         fCanvas = parent->fCanvas;
     }
+};
 
-    SkPdfNativeTokenizer* tokenizer() { return fTokenizer; }
-};
+// Calls SkPdfNativeTokenizer::readToken, and also does debugging help.
+// TODO(edisonn): Pass SkPdfContext and SkCanvas only with the define for instrumentation.
+// FIXME (scroggo): This calls tokenizer->readToken(). The rest of its functionality should
+// be moved to a debugging file.
+bool readToken(SkPdfNativeTokenizer*, PdfToken*);
+
 #endif // SkPdfTokenLooper_DEFINED