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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 VibrancyManager_h
#define VibrancyManager_h
#include "mozilla/Assertions.h"
#include "nsClassHashtable.h"
#include "nsRegion.h"
#include "nsTArray.h"
#include "ViewRegion.h"
#import <Foundation/NSGeometry.h>
@class NSColor;
@class NSView;
class nsChildView;
namespace mozilla {
enum class VibrancyType {
LIGHT,
DARK,
TOOLTIP,
MENU,
HIGHLIGHTED_MENUITEM,
SHEET,
SOURCE_LIST,
SOURCE_LIST_SELECTION,
ACTIVE_SOURCE_LIST_SELECTION
};
/**
* VibrancyManager takes care of updating the vibrant regions of a window.
* Vibrancy is a visual look that was introduced on OS X starting with 10.10.
* An app declares vibrant window regions to the window server, and the window
* server will display a blurred rendering of the screen contents from behind
* the window in these areas, behind the actual window contents. Consequently,
* the effect is only visible in areas where the window contents are not
* completely opaque. Usually this is achieved by clearing the background of
* the window prior to drawing in the vibrant areas. This is possible even if
* the window is declared as opaque.
*/
class VibrancyManager {
public:
/**
* Create a new VibrancyManager instance and provide it with an NSView
* to attach NSVisualEffectViews to.
*
* @param aCoordinateConverter The nsChildView to use for converting
* nsIntRect device pixel coordinates into Cocoa NSRect coordinates. Must
* outlive this VibrancyManager instance.
* @param aContainerView The view that's going to be the superview of the
* NSVisualEffectViews which will be created for vibrant regions.
*/
VibrancyManager(const nsChildView& aCoordinateConverter,
NSView* aContainerView)
: mCoordinateConverter(aCoordinateConverter)
, mContainerView(aContainerView)
{
MOZ_ASSERT(SystemSupportsVibrancy(),
"Don't instantiate this if !SystemSupportsVibrancy()");
}
/**
* Update the placement of the NSVisualEffectViews inside the container
* NSView so that they cover aRegion, and create new NSVisualEffectViews
* or remove existing ones as needed.
* @param aType The vibrancy type to use in the region.
* @param aRegion The vibrant area, in device pixels.
*/
void UpdateVibrantRegion(VibrancyType aType,
const LayoutDeviceIntRegion& aRegion);
bool HasVibrantRegions() { return !mVibrantRegions.IsEmpty(); }
/**
* Clear the vibrant areas that we know about.
* The clearing happens in the current NSGraphicsContext. If you call this
* from within an -[NSView drawRect:] implementation, the currrent
* NSGraphicsContext is already correctly set to the window drawing context.
*/
void ClearVibrantAreas() const;
/**
* Return the fill color that should be drawn on top of the cleared window
* parts. Usually this would be drawn by -[NSVisualEffectView drawRect:].
* The returned color is opaque if the system-wide "Reduce transparency"
* preference is set.
*/
NSColor* VibrancyFillColorForType(VibrancyType aType);
/**
* Return the font smoothing background color that should be used for text
* drawn on top of the vibrant window parts.
*/
NSColor* VibrancyFontSmoothingBackgroundColorForType(VibrancyType aType);
/**
* Check whether the operating system supports vibrancy at all.
* You may only create a VibrancyManager instance if this returns true.
* @return Whether VibrancyManager can be used on this OS.
*/
static bool SystemSupportsVibrancy();
protected:
void ClearVibrantRegion(const LayoutDeviceIntRegion& aVibrantRegion) const;
NSView* CreateEffectView(VibrancyType aType);
const nsChildView& mCoordinateConverter;
NSView* mContainerView;
nsClassHashtable<nsUint32HashKey, ViewRegion> mVibrantRegions;
};
} // namespace mozilla
#endif // VibrancyManager_h
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