Factor out a BaseContext from JsContext.

experimental/SkV8Example/JsContext.h

 /*
  * Copyright 2014 Google Inc.
  *
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  */
 
 #ifndef SkV8Example_JsContext_DEFINED
 #define SkV8Example_JsContext_DEFINED
 
 #include <v8.h>
 
 #include "SkPaint.h"
+#include "BaseContext.h"
 
 using namespace v8;
 
 class SkCanvas;
 class Global;
 
 // Provides the canvas context implementation in JS, and the OnDraw() method in
 // C++ that's used to bridge from C++ to JS. Should be used in JS as:
 //
 //  function onDraw(context) {
 //    context.fillStyle="#FF0000";
 //    context.fillRect(x, y, w, h);
 //  }
-class JsContext {
+class JsContext : public BaseContext {
 public:
     JsContext(Global* global)
-            : fGlobal(global)
+            : INHERITED(global)
             , fCanvas(NULL)
     {
-        fFillStyle.setColor(SK_ColorBLACK);
-        fFillStyle.setAntiAlias(true);
-        fFillStyle.setStyle(SkPaint::kFill_Style);
-        fStrokeStyle.setColor(SK_ColorBLACK);
-        fStrokeStyle.setAntiAlias(true);
-        fStrokeStyle.setStyle(SkPaint::kStroke_Style);
     }
-    ~JsContext();
+    virtual ~JsContext() {}
 
     // Parse the script.
     bool initialize();
 
     // Call this with the SkCanvas you want onDraw to draw on.
     void onDraw(SkCanvas* canvas);
 
+    virtual SkCanvas* getCanvas() { return fCanvas; };
+
 private:
-    static void GetStyle(Local<String> name,
-                         const PropertyCallbackInfo<Value>& info,
-                         const SkPaint& style);
-    static void SetStyle(Local<String> name, Local<Value> value,
-                         const PropertyCallbackInfo<void>& info,
-                         SkPaint& style);
-    // JS Attributes
-    static void GetFillStyle(Local<String> name,
-                         const PropertyCallbackInfo<Value>& info);
-    static void SetFillStyle(Local<String> name, Local<Value> value,
-                         const PropertyCallbackInfo<void>& info);
-    static void GetStrokeStyle(Local<String> name,
-                         const PropertyCallbackInfo<Value>& info);
-    static void SetStrokeStyle(Local<String> name, Local<Value> value,
-                         const PropertyCallbackInfo<void>& info);
-    static void GetWidth(Local<String> name,
-                         const PropertyCallbackInfo<Value>& info);
-    static void GetHeight(Local<String> name,
-                          const PropertyCallbackInfo<Value>& info);
-
-    // JS Methods
-    static void FillRect(const v8::FunctionCallbackInfo<Value>& args);
-    static void Stroke(const v8::FunctionCallbackInfo<Value>& args);
-    static void Fill(const v8::FunctionCallbackInfo<Value>& args);
-    static void Rotate(const v8::FunctionCallbackInfo<Value>& args);
-    static void Save(const v8::FunctionCallbackInfo<Value>& args);
-    static void Restore(const v8::FunctionCallbackInfo<Value>& args);
-    static void Translate(const v8::FunctionCallbackInfo<Value>& args);
-    static void ResetTransform(const v8::FunctionCallbackInfo<Value>& args);
-
-    // Get the pointer out of obj.
-    static JsContext* Unwrap(Handle<Object> obj);
-
-    // Create a template for JS object associated with JsContext, called lazily
-    // by Wrap() and the results are stored in gContextTemplate;
-    Handle<ObjectTemplate> makeContextTemplate();
 
     // Wrap the 'this' pointer into an Object. Can be retrieved via Unwrap.
     Handle<Object> wrap();
 
-    Global* fGlobal;
-
-    // Only valid when inside OnDraw().
-    SkCanvas* fCanvas;
-
-    SkPaint fFillStyle;
-    SkPaint fStrokeStyle;
-
     // A handle to the onDraw function defined in the script.
     Persistent<Function> fOnDraw;
 
     // The template for what a canvas context object looks like. The canvas
     // context object is what's passed into the JS onDraw() function.
     static Persistent<ObjectTemplate> gContextTemplate;
+
+    // Only valid when inside OnDraw().
+    SkCanvas* fCanvas;
+
+    typedef BaseContext INHERITED;
 };
 
 #endif