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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=8 et :
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsBaseScreen_h
#define nsBaseScreen_h
#include "mozilla/Attributes.h"
#include "nsIScreen.h"
class nsBaseScreen : public nsIScreen
{
public:
nsBaseScreen();
NS_DECL_ISUPPORTS
// nsIScreen interface
// These simply forward to the device-pixel versions;
// implementations where desktop pixels may not correspond
// to per-screen device pixels must override.
NS_IMETHOD GetRectDisplayPix(int32_t *outLeft, int32_t *outTop,
int32_t *outWidth, int32_t *outHeight) override;
NS_IMETHOD GetAvailRectDisplayPix(int32_t *outLeft, int32_t *outTop,
int32_t *outWidth, int32_t *outHeight) override;
/**
* Simple management of screen brightness locks. This abstract base class
* allows all widget implementations to share brightness locking code.
*/
NS_IMETHOD LockMinimumBrightness(uint32_t aBrightness) override;
NS_IMETHOD UnlockMinimumBrightness(uint32_t aBrightness) override;
NS_IMETHOD GetRotation(uint32_t* aRotation) override {
*aRotation = nsIScreen::ROTATION_0_DEG;
return NS_OK;
}
NS_IMETHOD SetRotation(uint32_t aRotation) override { return NS_ERROR_NOT_AVAILABLE; }
NS_IMETHOD GetContentsScaleFactor(double* aContentsScaleFactor) override;
NS_IMETHOD GetDefaultCSSScaleFactor(double* aScaleFactor) override;
protected:
virtual ~nsBaseScreen();
/**
* Manually set the current level of brightness locking. This is called after
* we determine, based on the current active locks, what the strongest
* lock is. You should normally not call this function - it will be
* called automatically by this class.
*
* Each widget implementation should implement this in a way that
* makes sense there. This is normally the only function that
* contains widget-specific code.
*
* The default implementation does nothing.
*
* @param aBrightness The current brightness level to set. If this is
* nsIScreen::BRIGHTNESS_LEVELS
* (an impossible value for a brightness level to be),
* then that signifies that there is no current
* minimum brightness level, and the screen can shut off.
*/
virtual void ApplyMinimumBrightness(uint32_t aBrightness) { }
private:
/**
* Checks what the minimum brightness value is, and calls
* ApplyMinimumBrightness.
*/
void CheckMinimumBrightness();
uint32_t mBrightnessLocks[nsIScreen::BRIGHTNESS_LEVELS];
};
#endif // nsBaseScreen_h
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