/* -*- 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 ViewRegion_h #define ViewRegion_h #include "Units.h" #include "nsTArray.h" @class NSView; namespace mozilla { /** * Manages a set of NSViews to cover a LayoutDeviceIntRegion. */ class ViewRegion { public: ~ViewRegion(); mozilla::LayoutDeviceIntRegion Region() { return mRegion; } /** * Update the region. * @param aRegion The new region. * @param aCoordinateConverter The nsChildView to use for converting * LayoutDeviceIntRect device pixel coordinates into Cocoa NSRect coordinates. * @param aContainerView The view that's going to be the superview of the * NSViews which will be created for this region. * @param aViewCreationCallback A block that instantiates new NSViews. * @return Whether or not the region changed. */ bool UpdateRegion(const mozilla::LayoutDeviceIntRegion& aRegion, const nsChildView& aCoordinateConverter, NSView* aContainerView, NSView* (^aViewCreationCallback)()); /** * Return an NSView from the region, if there is any. */ NSView* GetAnyView() { return mViews.Length() > 0 ? mViews[0] : nil; } private: mozilla::LayoutDeviceIntRegion mRegion; nsTArray<NSView*> mViews; }; } // namespace mozilla #endif // ViewRegion_h