mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-30 21:55:31 +00:00
97 lines
2.5 KiB
C++
97 lines
2.5 KiB
C++
/*-*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
* 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 NSDISPLAYLISTINVALIDATION_H_
|
|
#define NSDISPLAYLISTINVALIDATION_H_
|
|
|
|
#include "nsRect.h"
|
|
|
|
class nsDisplayItem;
|
|
class nsDisplayListBuilder;
|
|
class nsDisplayBackgroundImage;
|
|
|
|
/**
|
|
* This stores the geometry of an nsDisplayItem, and the area
|
|
* that will be affected when painting the item.
|
|
*
|
|
* It is used to retain information about display items so they
|
|
* can be compared against new display items in the next paint.
|
|
*/
|
|
class nsDisplayItemGeometry
|
|
{
|
|
public:
|
|
nsDisplayItemGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
|
|
virtual ~nsDisplayItemGeometry();
|
|
|
|
/**
|
|
* Compute the area required to be invalidated if this
|
|
* display item is removed.
|
|
*/
|
|
const nsRect& ComputeInvalidationRegion() { return mBounds; }
|
|
|
|
/**
|
|
* Shifts all retained areas of the nsDisplayItemGeometry by the given offset.
|
|
*
|
|
* This is used to compensate for scrolling, since the destination buffer
|
|
* can scroll without requiring a full repaint.
|
|
*
|
|
* @param aOffset Offset to shift by.
|
|
*/
|
|
virtual void MoveBy(const nsPoint& aOffset) = 0;
|
|
|
|
/**
|
|
* Bounds of the display item
|
|
*/
|
|
nsRect mBounds;
|
|
};
|
|
|
|
/**
|
|
* A default geometry implementation, used by nsDisplayItem. Retains
|
|
* and compares the bounds, and border rect.
|
|
*
|
|
* This should be sufficient for the majority of display items.
|
|
*/
|
|
class nsDisplayItemGenericGeometry : public nsDisplayItemGeometry
|
|
{
|
|
public:
|
|
nsDisplayItemGenericGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
|
|
|
|
virtual void MoveBy(const nsPoint& aOffset);
|
|
|
|
nsRect mBorderRect;
|
|
};
|
|
|
|
class nsDisplayBorderGeometry : public nsDisplayItemGeometry
|
|
{
|
|
public:
|
|
nsDisplayBorderGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
|
|
|
|
virtual void MoveBy(const nsPoint& aOffset);
|
|
|
|
nsRect mContentRect;
|
|
};
|
|
|
|
class nsDisplayBackgroundGeometry : public nsDisplayItemGeometry
|
|
{
|
|
public:
|
|
nsDisplayBackgroundGeometry(nsDisplayBackgroundImage* aItem, nsDisplayListBuilder* aBuilder);
|
|
|
|
virtual void MoveBy(const nsPoint& aOffset);
|
|
|
|
nsRect mPositioningArea;
|
|
};
|
|
|
|
class nsDisplayBoxShadowInnerGeometry : public nsDisplayItemGeometry
|
|
{
|
|
public:
|
|
nsDisplayBoxShadowInnerGeometry(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder);
|
|
|
|
virtual void MoveBy(const nsPoint& aOffset);
|
|
|
|
nsRect mPaddingRect;
|
|
};
|
|
|
|
#endif /*NSDISPLAYLISTINVALIDATION_H_*/
|