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-rw-r--r--widget/nsBaseScreen.h81
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diff --git a/widget/nsBaseScreen.h b/widget/nsBaseScreen.h
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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