michael@0: /*-*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef NSDISPLAYLISTINVALIDATION_H_
michael@0: #define NSDISPLAYLISTINVALIDATION_H_
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "nsRect.h"
michael@0: #include "nsColor.h"
michael@0: 
michael@0: class nsDisplayItem;
michael@0: class nsDisplayListBuilder;
michael@0: class nsDisplayBackgroundImage;
michael@0: class nsDisplayThemedBackground;
michael@0: 
michael@0: /**
michael@0:  * This stores the geometry of an nsDisplayItem, and the area
michael@0:  * that will be affected when painting the item.
michael@0:  *
michael@0:  * It is used to retain information about display items so they
michael@0:  * can be compared against new display items in the next paint.
michael@0:  */
michael@0: class nsDisplayItemGeometry
michael@0: {
michael@0: public:
michael@0:   nsDisplayItemGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
michael@0:   virtual ~nsDisplayItemGeometry();
michael@0:   
michael@0:   /**
michael@0:    * Compute the area required to be invalidated if this
michael@0:    * display item is removed.
michael@0:    */
michael@0:   const nsRect& ComputeInvalidationRegion() { return mBounds; }
michael@0:   
michael@0:   /**
michael@0:    * Shifts all retained areas of the nsDisplayItemGeometry by the given offset.
michael@0:    * 
michael@0:    * This is used to compensate for scrolling, since the destination buffer
michael@0:    * can scroll without requiring a full repaint.
michael@0:    *
michael@0:    * @param aOffset Offset to shift by.
michael@0:    */
michael@0:   virtual void MoveBy(const nsPoint& aOffset) = 0;
michael@0: 
michael@0:   /**
michael@0:    * Bounds of the display item
michael@0:    */
michael@0:   nsRect mBounds;
michael@0: };
michael@0: 
michael@0: /**
michael@0:  * A default geometry implementation, used by nsDisplayItem. Retains
michael@0:  * and compares the bounds, and border rect.
michael@0:  *
michael@0:  * This should be sufficient for the majority of display items.
michael@0:  */
michael@0: class nsDisplayItemGenericGeometry : public nsDisplayItemGeometry
michael@0: {
michael@0: public:
michael@0:   nsDisplayItemGenericGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
michael@0: 
michael@0:   virtual void MoveBy(const nsPoint& aOffset) MOZ_OVERRIDE;
michael@0: 
michael@0:   nsRect mBorderRect;
michael@0: };
michael@0: 
michael@0: class nsDisplayItemBoundsGeometry : public nsDisplayItemGeometry
michael@0: {
michael@0: public:
michael@0:   nsDisplayItemBoundsGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
michael@0: 
michael@0:   virtual void MoveBy(const nsPoint& aOffset) MOZ_OVERRIDE;
michael@0: 
michael@0:   bool mHasRoundedCorners;
michael@0: };
michael@0: 
michael@0: class nsDisplayBorderGeometry : public nsDisplayItemGeometry
michael@0: {
michael@0: public:
michael@0:   nsDisplayBorderGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
michael@0: 
michael@0:   virtual void MoveBy(const nsPoint& aOffset) MOZ_OVERRIDE;
michael@0: 
michael@0:   nsRect mContentRect;
michael@0: };
michael@0: 
michael@0: class nsDisplayBackgroundGeometry : public nsDisplayItemGeometry
michael@0: {
michael@0: public:
michael@0:   nsDisplayBackgroundGeometry(nsDisplayBackgroundImage* aItem, nsDisplayListBuilder* aBuilder);
michael@0: 
michael@0:   virtual void MoveBy(const nsPoint& aOffset) MOZ_OVERRIDE;
michael@0: 
michael@0:   nsRect mPositioningArea;
michael@0: };
michael@0: 
michael@0: class nsDisplayThemedBackgroundGeometry : public nsDisplayItemGeometry
michael@0: {
michael@0: public:
michael@0:   nsDisplayThemedBackgroundGeometry(nsDisplayThemedBackground* aItem, nsDisplayListBuilder* aBuilder);
michael@0: 
michael@0:   virtual void MoveBy(const nsPoint& aOffset) MOZ_OVERRIDE;
michael@0: 
michael@0:   nsRect mPositioningArea;
michael@0:   bool mWindowIsActive;
michael@0: };
michael@0: 
michael@0: class nsDisplayBoxShadowInnerGeometry : public nsDisplayItemGeometry
michael@0: {
michael@0: public:
michael@0:   nsDisplayBoxShadowInnerGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
michael@0:   
michael@0:   virtual void MoveBy(const nsPoint& aOffset) MOZ_OVERRIDE;
michael@0: 
michael@0:   nsRect mPaddingRect;
michael@0: };
michael@0: 
michael@0: class nsDisplaySolidColorGeometry : public nsDisplayItemBoundsGeometry
michael@0: {
michael@0: public:
michael@0:   nsDisplaySolidColorGeometry(nsDisplayItem* aItem,
michael@0:                               nsDisplayListBuilder* aBuilder,
michael@0:                               nscolor aColor)
michael@0:     : nsDisplayItemBoundsGeometry(aItem, aBuilder)
michael@0:     , mColor(aColor)
michael@0:   { }
michael@0: 
michael@0:   nscolor mColor;
michael@0: };
michael@0: 
michael@0: #endif /*NSDISPLAYLISTINVALIDATION_H_*/