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// 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 CHROME_BROWSER_EXTENSIONS_API_CAPTURE_WEB_CONTENTS_FUNCTION_H_
#define CHROME_BROWSER_EXTENSIONS_API_CAPTURE_WEB_CONTENTS_FUNCTION_H_
#include "chrome/browser/extensions/chrome_extension_function.h"
#include "chrome/common/extensions/api/types.h"
class SkBitmap;
namespace content {
class WebContents;
}
namespace extensions {
// Base class for capturing visibile area of a WebContents.
// This is used by both webview.captureVisibleRegion and tabs.captureVisibleTab.
class CaptureWebContentsFunction : public ChromeAsyncExtensionFunction {
public:
CaptureWebContentsFunction();
protected:
virtual ~CaptureWebContentsFunction();
// ExtensionFunction implementation.
virtual bool HasPermission() OVERRIDE;
virtual bool RunAsync() OVERRIDE;
virtual bool IsScreenshotEnabled() = 0;
virtual content::WebContents* GetWebContentsForID(int context_id) = 0;
enum FailureReason {
FAILURE_REASON_UNKNOWN,
FAILURE_REASON_ENCODING_FAILED,
FAILURE_REASON_VIEW_INVISIBLE
};
virtual void OnCaptureFailure(FailureReason reason) = 0;
private:
typedef api::types::ImageDetails ImageDetails;
void CopyFromBackingStoreComplete(bool succeed, const SkBitmap& bitmap);
void OnCaptureSuccess(const SkBitmap& bitmap);
// |context_id_| is the ID used to find the relevant WebContents. In the
// |tabs.captureVisibleTab()| api, this represents the window-id, and in the
// |webview.captureVisibleRegion()| api, this represents the instance-id of
// the guest.
int context_id_;
// The format (JPEG vs PNG) of the resulting image. Set in RunAsync().
ImageDetails::Format image_format_;
// Quality setting to use when encoding jpegs. Set in RunAsync().
int image_quality_;
DISALLOW_COPY_AND_ASSIGN(CaptureWebContentsFunction);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_CAPTURE_WEB_CONTENTS_FUNCTION_H_
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