Adds PrintingContext implementation stub for Android.

printing/printing_context_android.h

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PRINTING_PRINTING_CONTEXT_ANDROID_H_
+#define PRINTING_PRINTING_CONTEXT_ANDROID_H_
+
+#include <jni.h>
+
+#include <string>
+
+#include "base/android/scoped_java_ref.h"
+#include "printing/printing_context.h"
+
+namespace printing {
+
+// Android subclass of PrintingContext.  The implementation for this header file
+// resides in Chrome for Android repository.  This class communicates with the
+// Java side through JNI.
+class PRINTING_EXPORT PrintingContextAndroid : public PrintingContext {
+ public:
+  explicit PrintingContextAndroid(const std::string& app_locale);
+  virtual ~PrintingContextAndroid();
+
+  // Called when the page is successfully written to a PDF using the file
+  // descriptor specified, or when the printing operation failed.
+  static void PdfWritingDone(int fd, bool success);
+
+  // Called from Java, when printing settings from the user are ready or the
+  // printing operation is canceled.
+  void AskUserForSettingsReply(bool success);
+
+  // PrintingContext implementation.
+  virtual void AskUserForSettings(
+      gfx::NativeView parent_view,
+      int max_pages,
+      bool has_selection,
+      const PrintSettingsCallback& callback) OVERRIDE;
+  virtual Result UseDefaultSettings() OVERRIDE;
+  virtual Result UpdatePrinterSettings(
+      const base::DictionaryValue& job_settings,
+      const PageRanges& ranges) OVERRIDE;
+  virtual Result InitWithSettings(const PrintSettings& settings) OVERRIDE;
+  virtual Result NewDocument(const string16& document_name) OVERRIDE;
+  virtual Result NewPage() OVERRIDE;
+  virtual Result PageDone() OVERRIDE;
+  virtual Result DocumentDone() OVERRIDE;
+  virtual void Cancel() OVERRIDE;
+  virtual void ReleaseContext() OVERRIDE;
+  virtual gfx::NativeDrawingContext context() const OVERRIDE;
+
+  // Registers JNI bindings for RegisterContext.
+  static bool RegisterPrintingContext(JNIEnv* env);
+
+ private:
+  base::android::ScopedJavaGlobalRef<jobject> j_printing_context_;
+
+  // The callback from AskUserForSettings to be called when the settings are
+  // ready on the Java side
+  PrintSettingsCallback callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(PrintingContextAndroid);
+};
+
+}  // namespace printing
+
+#endif  // PRINTING_PRINTING_CONTEXT_ANDROID_H_
+