зеркало из https://github.com/mozilla/gecko-dev.git
104 строки
3.6 KiB
Objective-C
104 строки
3.6 KiB
Objective-C
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef VibrancyManager_h
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#define VibrancyManager_h
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#include "mozilla/Assertions.h"
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#include "mozilla/TypedEnum.h"
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#include "nsClassHashtable.h"
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#include "nsRegion.h"
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#include "nsTArray.h"
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#import <Foundation/NSGeometry.h>
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@class NSView;
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class nsChildView;
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class nsIntRegion;
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namespace mozilla {
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MOZ_BEGIN_ENUM_CLASS(VibrancyType)
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LIGHT,
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DARK
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MOZ_END_ENUM_CLASS(VibrancyType)
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/**
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* VibrancyManager takes care of updating the vibrant regions of a window.
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* Vibrancy is a visual look that was introduced on OS X starting with 10.10.
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* An app declares vibrant window regions to the window server, and the window
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* server will display a blurred rendering of the screen contents from behind
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* the window in these areas, behind the actual window contents. Consequently,
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* the effect is only visible in areas where the window contents are not
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* completely opaque. Usually this is achieved by clearing the background of
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* the window prior to drawing in the vibrant areas. This is possible even if
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* the window is declared as opaque.
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*/
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class VibrancyManager {
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public:
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/**
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* Create a new VibrancyManager instance and provide it with an NSView
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* to attach NSVisualEffectViews to.
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*
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* @param aCoordinateConverter The nsChildView to use for converting
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* nsIntRect device pixel coordinates into Cocoa NSRect coordinates. Must
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* outlive this VibrancyManager instance.
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* @param aContainerView The view that's going to be the superview of the
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* NSVisualEffectViews which will be created for vibrant regions.
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*/
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VibrancyManager(const nsChildView& aCoordinateConverter,
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NSView* aContainerView)
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: mCoordinateConverter(aCoordinateConverter)
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, mContainerView(aContainerView)
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{
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MOZ_ASSERT(SystemSupportsVibrancy(),
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"Don't instantiate this if !SystemSupportsVibrancy()");
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}
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/**
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* Update the placement of the NSVisualEffectViews inside the container
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* NSView so that they cover aRegion, and create new NSVisualEffectViews
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* or remove existing ones as needed.
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* @param aType The vibrancy type to use in the region.
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* @param aRegion The vibrant area, in device pixels.
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*/
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void UpdateVibrantRegion(VibrancyType aType, const nsIntRegion& aRegion);
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/**
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* Clear the vibrant areas that we know about.
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* The clearing happens in the current NSGraphicsContext. If you call this
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* from within an -[NSView drawRect:] implementation, the currrent
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* NSGraphicsContext is already correctly set to the window drawing context.
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*/
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void ClearVibrantAreas() const;
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/**
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* Check whether the operating system supports vibrancy at all.
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* You may only create a VibrancyManager instance if this returns true.
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* @return Whether VibrancyManager can be used on this OS.
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*/
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static bool SystemSupportsVibrancy();
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// The following are only public because otherwise ClearVibrantRegionFunc
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// can't see them.
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struct VibrantRegion {
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nsIntRegion region;
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nsTArray<NSView*> effectViews;
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};
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void ClearVibrantRegion(const VibrantRegion& aVibrantRegion) const;
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protected:
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NSView* CreateEffectView(VibrancyType aType, NSRect aRect);
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const nsChildView& mCoordinateConverter;
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NSView* mContainerView;
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nsClassHashtable<nsUint32HashKey, VibrantRegion> mVibrantRegions;
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};
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}
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#endif // VibrancyManager_h
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