1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/base/nsDisplayListInvalidation.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,133 @@
1.4 +/*-*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.7 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef NSDISPLAYLISTINVALIDATION_H_
1.10 +#define NSDISPLAYLISTINVALIDATION_H_
1.11 +
1.12 +#include "mozilla/Attributes.h"
1.13 +#include "nsRect.h"
1.14 +#include "nsColor.h"
1.15 +
1.16 +class nsDisplayItem;
1.17 +class nsDisplayListBuilder;
1.18 +class nsDisplayBackgroundImage;
1.19 +class nsDisplayThemedBackground;
1.20 +
1.21 +/**
1.22 + * This stores the geometry of an nsDisplayItem, and the area
1.23 + * that will be affected when painting the item.
1.24 + *
1.25 + * It is used to retain information about display items so they
1.26 + * can be compared against new display items in the next paint.
1.27 + */
1.28 +class nsDisplayItemGeometry
1.29 +{
1.30 +public:
1.31 + nsDisplayItemGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
1.32 + virtual ~nsDisplayItemGeometry();
1.33 +
1.34 + /**
1.35 + * Compute the area required to be invalidated if this
1.36 + * display item is removed.
1.37 + */
1.38 + const nsRect& ComputeInvalidationRegion() { return mBounds; }
1.39 +
1.40 + /**
1.41 + * Shifts all retained areas of the nsDisplayItemGeometry by the given offset.
1.42 + *
1.43 + * This is used to compensate for scrolling, since the destination buffer
1.44 + * can scroll without requiring a full repaint.
1.45 + *
1.46 + * @param aOffset Offset to shift by.
1.47 + */
1.48 + virtual void MoveBy(const nsPoint& aOffset) = 0;
1.49 +
1.50 + /**
1.51 + * Bounds of the display item
1.52 + */
1.53 + nsRect mBounds;
1.54 +};
1.55 +
1.56 +/**
1.57 + * A default geometry implementation, used by nsDisplayItem. Retains
1.58 + * and compares the bounds, and border rect.
1.59 + *
1.60 + * This should be sufficient for the majority of display items.
1.61 + */
1.62 +class nsDisplayItemGenericGeometry : public nsDisplayItemGeometry
1.63 +{
1.64 +public:
1.65 + nsDisplayItemGenericGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
1.66 +
1.67 + virtual void MoveBy(const nsPoint& aOffset) MOZ_OVERRIDE;
1.68 +
1.69 + nsRect mBorderRect;
1.70 +};
1.71 +
1.72 +class nsDisplayItemBoundsGeometry : public nsDisplayItemGeometry
1.73 +{
1.74 +public:
1.75 + nsDisplayItemBoundsGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
1.76 +
1.77 + virtual void MoveBy(const nsPoint& aOffset) MOZ_OVERRIDE;
1.78 +
1.79 + bool mHasRoundedCorners;
1.80 +};
1.81 +
1.82 +class nsDisplayBorderGeometry : public nsDisplayItemGeometry
1.83 +{
1.84 +public:
1.85 + nsDisplayBorderGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
1.86 +
1.87 + virtual void MoveBy(const nsPoint& aOffset) MOZ_OVERRIDE;
1.88 +
1.89 + nsRect mContentRect;
1.90 +};
1.91 +
1.92 +class nsDisplayBackgroundGeometry : public nsDisplayItemGeometry
1.93 +{
1.94 +public:
1.95 + nsDisplayBackgroundGeometry(nsDisplayBackgroundImage* aItem, nsDisplayListBuilder* aBuilder);
1.96 +
1.97 + virtual void MoveBy(const nsPoint& aOffset) MOZ_OVERRIDE;
1.98 +
1.99 + nsRect mPositioningArea;
1.100 +};
1.101 +
1.102 +class nsDisplayThemedBackgroundGeometry : public nsDisplayItemGeometry
1.103 +{
1.104 +public:
1.105 + nsDisplayThemedBackgroundGeometry(nsDisplayThemedBackground* aItem, nsDisplayListBuilder* aBuilder);
1.106 +
1.107 + virtual void MoveBy(const nsPoint& aOffset) MOZ_OVERRIDE;
1.108 +
1.109 + nsRect mPositioningArea;
1.110 + bool mWindowIsActive;
1.111 +};
1.112 +
1.113 +class nsDisplayBoxShadowInnerGeometry : public nsDisplayItemGeometry
1.114 +{
1.115 +public:
1.116 + nsDisplayBoxShadowInnerGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
1.117 +
1.118 + virtual void MoveBy(const nsPoint& aOffset) MOZ_OVERRIDE;
1.119 +
1.120 + nsRect mPaddingRect;
1.121 +};
1.122 +
1.123 +class nsDisplaySolidColorGeometry : public nsDisplayItemBoundsGeometry
1.124 +{
1.125 +public:
1.126 + nsDisplaySolidColorGeometry(nsDisplayItem* aItem,
1.127 + nsDisplayListBuilder* aBuilder,
1.128 + nscolor aColor)
1.129 + : nsDisplayItemBoundsGeometry(aItem, aBuilder)
1.130 + , mColor(aColor)
1.131 + { }
1.132 +
1.133 + nscolor mColor;
1.134 +};
1.135 +
1.136 +#endif /*NSDISPLAYLISTINVALIDATION_H_*/
