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gecko-dev/layout/generic/nsGfxScrollFrame.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* rendering object to wrap rendering objects that should be scrollable */
#ifndef nsGfxScrollFrame_h___
#define nsGfxScrollFrame_h___
#include "nsContainerFrame.h"
#include "nsIAnonymousContentCreator.h"
#include "nsBoxFrame.h"
#include "nsDisplayList.h"
#include "nsIScrollableFrame.h"
#include "nsIScrollPositionListener.h"
#include "nsIStatefulFrame.h"
#include "nsThreadUtils.h"
#include "nsIReflowCallback.h"
#include "nsBoxLayoutState.h"
#include "nsQueryFrame.h"
#include "nsCOMArray.h"
#include "nsSVGIntegrationUtils.h"
#include "nsExpirationTracker.h"
class nsPresContext;
class nsIPresShell;
class nsIContent;
class nsIAtom;
class nsIDocument;
class nsIScrollFrameInternal;
class nsPresState;
struct ScrollReflowState;
// When set, the next scroll operation on the scrollframe will invalidate its
// entire contents. Useful for text-overflow.
// This bit is cleared after each time the scrollframe is scrolled. Whoever
// needs to set it should set it again on each paint.
#define NS_SCROLLFRAME_INVALIDATE_CONTENTS_ON_SCROLL NS_FRAME_STATE_BIT(20)
class nsGfxScrollFrameInner : public nsIReflowCallback {
public:
class AsyncScroll;
nsGfxScrollFrameInner(nsContainerFrame* aOuter, bool aIsRoot);
~nsGfxScrollFrameInner();
typedef nsIScrollableFrame::ScrollbarStyles ScrollbarStyles;
ScrollbarStyles GetScrollbarStylesFromFrame() const;
// If a child frame was added or removed on the scrollframe,
// reload our child frame list.
// We need this if a scrollbar frame is recreated.
void ReloadChildFrames();
nsresult CreateAnonymousContent(
nsTArray<nsIAnonymousContentCreator::ContentInfo>& aElements);
void AppendAnonymousContentTo(nsBaseContentList& aElements, PRUint32 aFilter);
nsresult FireScrollPortEvent();
void PostOverflowEvent();
void Destroy();
bool ShouldBuildLayer() const;
nsresult BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
void AppendScrollPartsTo(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists,
bool& aCreateLayer,
bool aPositioned);
bool GetBorderRadii(nscoord aRadii[8]) const;
// nsIReflowCallback
virtual bool ReflowFinished();
virtual void ReflowCallbackCanceled();
// This gets called when the 'curpos' attribute on one of the scrollbars changes
void CurPosAttributeChanged(nsIContent* aChild);
void PostScrollEvent();
void FireScrollEvent();
void PostScrolledAreaEvent();
void FireScrolledAreaEvent();
class ScrollEvent : public nsRunnable {
public:
NS_DECL_NSIRUNNABLE
ScrollEvent(nsGfxScrollFrameInner *inner) : mInner(inner) {}
void Revoke() { mInner = nsnull; }
private:
nsGfxScrollFrameInner *mInner;
};
class AsyncScrollPortEvent : public nsRunnable {
public:
NS_DECL_NSIRUNNABLE
AsyncScrollPortEvent(nsGfxScrollFrameInner *inner) : mInner(inner) {}
void Revoke() { mInner = nsnull; }
private:
nsGfxScrollFrameInner *mInner;
};
class ScrolledAreaEvent : public nsRunnable {
public:
NS_DECL_NSIRUNNABLE
ScrolledAreaEvent(nsGfxScrollFrameInner *inner) : mInner(inner) {}
void Revoke() { mInner = nsnull; }
private:
nsGfxScrollFrameInner *mInner;
};
static void FinishReflowForScrollbar(nsIContent* aContent, nscoord aMinXY,
nscoord aMaxXY, nscoord aCurPosXY,
nscoord aPageIncrement,
nscoord aIncrement);
static void SetScrollbarEnabled(nsIContent* aContent, nscoord aMaxPos);
static void SetCoordAttribute(nsIContent* aContent, nsIAtom* aAtom,
nscoord aSize);
nscoord GetCoordAttribute(nsIBox* aFrame, nsIAtom* atom, nscoord defaultValue);
// Update scrollbar curpos attributes to reflect current scroll position
void UpdateScrollbarPosition();
nsRect GetScrollPortRect() const { return mScrollPort; }
nsPoint GetScrollPosition() const {
return mScrollPort.TopLeft() - mScrolledFrame->GetPosition();
}
/**
* For LTR frames, the logical scroll position is the offset of the top left
* corner of the frame from the top left corner of the scroll port (same as
* GetScrollPosition).
* For RTL frames, it is the offset of the top right corner of the frame from
* the top right corner of the scroll port
*/
nsPoint GetLogicalScrollPosition() const {
nsPoint pt;
pt.x = IsLTR() ?
mScrollPort.x - mScrolledFrame->GetPosition().x :
mScrollPort.XMost() - mScrolledFrame->GetRect().XMost();
pt.y = mScrollPort.y - mScrolledFrame->GetPosition().y;
return pt;
}
nsRect GetScrollRange() const;
nsPoint RestrictToDevPixels(const nsPoint& aPt, nsIntPoint* aPtDevPx, bool aShouldClamp) const;
nsPoint ClampScrollPosition(const nsPoint& aPt) const;
static void AsyncScrollCallback(nsITimer *aTimer, void* anInstance);
void ScrollTo(nsPoint aScrollPosition, nsIScrollableFrame::ScrollMode aMode) {
ScrollToWithOrigin(aScrollPosition, aMode, nsGkAtoms::other);
};
void ScrollToImpl(nsPoint aScrollPosition);
void ScrollVisual(nsPoint aOldScrolledFramePosition);
void ScrollBy(nsIntPoint aDelta, nsIScrollableFrame::ScrollUnit aUnit,
nsIScrollableFrame::ScrollMode aMode, nsIntPoint* aOverflow, nsIAtom *aOrigin = nsnull);
void ScrollToRestoredPosition();
nsSize GetLineScrollAmount() const;
nsSize GetPageScrollAmount() const;
nsPresState* SaveState(nsIStatefulFrame::SpecialStateID aStateID);
void RestoreState(nsPresState* aState);
nsIFrame* GetScrolledFrame() const { return mScrolledFrame; }
nsIBox* GetScrollbarBox(bool aVertical) const {
return aVertical ? mVScrollbarBox : mHScrollbarBox;
}
void AddScrollPositionListener(nsIScrollPositionListener* aListener) {
mListeners.AppendElement(aListener);
}
void RemoveScrollPositionListener(nsIScrollPositionListener* aListener) {
mListeners.RemoveElement(aListener);
}
static void SetScrollbarVisibility(nsIBox* aScrollbar, bool aVisible);
/**
* GetScrolledRect is designed to encapsulate deciding which
* directions of overflow should be reachable by scrolling and which
* should not. Callers should NOT depend on it having any particular
* behavior (although nsXULScrollFrame currently does).
*
* This should only be called when the scrolled frame has been
* reflowed with the scroll port size given in mScrollPort.
*
* Currently it allows scrolling down and to the right for
* nsHTMLScrollFrames with LTR directionality and for all
* nsXULScrollFrames, and allows scrolling down and to the left for
* nsHTMLScrollFrames with RTL directionality.
*/
nsRect GetScrolledRect() const;
/**
* GetScrolledRectInternal is designed to encapsulate deciding which
* directions of overflow should be reachable by scrolling and which
* should not. Callers should NOT depend on it having any particular
* behavior (although nsXULScrollFrame currently does).
*
* Currently it allows scrolling down and to the right for
* nsHTMLScrollFrames with LTR directionality and for all
* nsXULScrollFrames, and allows scrolling down and to the left for
* nsHTMLScrollFrames with RTL directionality.
*/
nsRect GetScrolledRectInternal(const nsRect& aScrolledOverflowArea,
const nsSize& aScrollPortSize) const;
PRUint32 GetScrollbarVisibility() const {
return (mHasVerticalScrollbar ? nsIScrollableFrame::VERTICAL : 0) |
(mHasHorizontalScrollbar ? nsIScrollableFrame::HORIZONTAL : 0);
}
nsMargin GetActualScrollbarSizes() const;
nsMargin GetDesiredScrollbarSizes(nsBoxLayoutState* aState);
bool IsLTR() const;
bool IsScrollbarOnRight() const;
bool IsScrollingActive() const { return mScrollingActive || ShouldBuildLayer(); }
bool UpdateOverflow();
// adjust the scrollbar rectangle aRect to account for any visible resizer.
// aHasResizer specifies if there is a content resizer, however this method
// will also check if a widget resizer is present as well.
void AdjustScrollbarRectForResizer(nsIFrame* aFrame, nsPresContext* aPresContext,
nsRect& aRect, bool aHasResizer, bool aVertical);
// returns true if a resizer should be visible
bool HasResizer() { return mResizerBox && !mCollapsedResizer; }
void LayoutScrollbars(nsBoxLayoutState& aState,
const nsRect& aContentArea,
const nsRect& aOldScrollArea);
bool IsIgnoringViewportClipping() const;
bool ShouldClampScrollPosition() const;
bool IsAlwaysActive() const;
void MarkActive();
void MarkInactive();
nsExpirationState* GetExpirationState() { return &mActivityExpirationState; }
void ScheduleSyntheticMouseMove();
static void ScrollActivityCallback(nsITimer *aTimer, void* anInstance);
// owning references to the nsIAnonymousContentCreator-built content
nsCOMPtr<nsIContent> mHScrollbarContent;
nsCOMPtr<nsIContent> mVScrollbarContent;
nsCOMPtr<nsIContent> mScrollCornerContent;
nsCOMPtr<nsIContent> mResizerContent;
nsRevocableEventPtr<ScrollEvent> mScrollEvent;
nsRevocableEventPtr<AsyncScrollPortEvent> mAsyncScrollPortEvent;
nsRevocableEventPtr<ScrolledAreaEvent> mScrolledAreaEvent;
nsIBox* mHScrollbarBox;
nsIBox* mVScrollbarBox;
nsIFrame* mScrolledFrame;
nsIBox* mScrollCornerBox;
nsIBox* mResizerBox;
nsContainerFrame* mOuter;
AsyncScroll* mAsyncScroll;
nsTArray<nsIScrollPositionListener*> mListeners;
nsRect mScrollPort;
// Where we're currently scrolling to, if we're scrolling asynchronously.
// If we're not in the middle of an asynchronous scroll then this is
// just the current scroll position. ScrollBy will choose its
// destination based on this value.
nsPoint mDestination;
nsPoint mScrollPosAtLastPaint;
nsPoint mRestorePos;
nsPoint mLastPos;
nsExpirationState mActivityExpirationState;
nsCOMPtr<nsITimer> mScrollActivityTimer;
bool mNeverHasVerticalScrollbar:1;
bool mNeverHasHorizontalScrollbar:1;
bool mHasVerticalScrollbar:1;
bool mHasHorizontalScrollbar:1;
bool mFrameIsUpdatingScrollbar:1;
bool mDidHistoryRestore:1;
// Is this the scrollframe for the document's viewport?
bool mIsRoot:1;
// If true, don't try to layout the scrollbars in Reflow(). This can be
// useful if multiple passes are involved, because we don't want to place the
// scrollbars at the wrong size.
bool mSupppressScrollbarUpdate:1;
// If true, we skipped a scrollbar layout due to mSupppressScrollbarUpdate
// being set at some point. That means we should lay out scrollbars even if
// it might not strictly be needed next time mSupppressScrollbarUpdate is
// false.
bool mSkippedScrollbarLayout:1;
bool mHadNonInitialReflow:1;
// State used only by PostScrollEvents so we know
// which overflow states have changed.
bool mHorizontalOverflow:1;
bool mVerticalOverflow:1;
bool mPostedReflowCallback:1;
bool mMayHaveDirtyFixedChildren:1;
// If true, need to actually update our scrollbar attributes in the
// reflow callback.
bool mUpdateScrollbarAttributes:1;
// If true, we should be prepared to scroll using this scrollframe
// by placing descendant content into its own layer(s)
bool mScrollingActive:1;
// If true, the resizer is collapsed and not displayed
bool mCollapsedResizer:1;
// If true, the layer should always be active because we always build a layer.
// Used for asynchronous scrolling.
bool mShouldBuildLayer:1;
protected:
void ScrollToWithOrigin(nsPoint aScrollPosition,
nsIScrollableFrame::ScrollMode aMode,
nsIAtom *aOrigin); // nsnull indicates "other" origin
};
/**
* The scroll frame creates and manages the scrolling view
*
* It only supports having a single child frame that typically is an area
* frame, but doesn't have to be. The child frame must have a view, though
*
* Scroll frames don't support incremental changes, i.e. you can't replace
* or remove the scrolled frame
*/
class nsHTMLScrollFrame : public nsContainerFrame,
public nsIScrollableFrame,
public nsIAnonymousContentCreator,
public nsIStatefulFrame {
public:
friend nsIFrame* NS_NewHTMLScrollFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, bool aIsRoot);
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS
// Called to set the child frames. We typically have three: the scroll area,
// the vertical scrollbar, and the horizontal scrollbar.
NS_IMETHOD SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList);
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) {
return mInner.BuildDisplayList(aBuilder, aDirtyRect, aLists);
}
bool TryLayout(ScrollReflowState* aState,
nsHTMLReflowMetrics* aKidMetrics,
bool aAssumeVScroll, bool aAssumeHScroll,
bool aForce, nsresult* aResult);
bool ScrolledContentDependsOnHeight(ScrollReflowState* aState);
nsresult ReflowScrolledFrame(ScrollReflowState* aState,
bool aAssumeHScroll,
bool aAssumeVScroll,
nsHTMLReflowMetrics* aMetrics,
bool aFirstPass);
nsresult ReflowContents(ScrollReflowState* aState,
const nsHTMLReflowMetrics& aDesiredSize);
void PlaceScrollArea(const ScrollReflowState& aState,
const nsPoint& aScrollPosition);
nscoord GetIntrinsicVScrollbarWidth(nsRenderingContext *aRenderingContext);
virtual bool GetBorderRadii(nscoord aRadii[8]) const {
return mInner.GetBorderRadii(aRadii);
}
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext);
NS_IMETHOD GetPadding(nsMargin& aPadding);
virtual bool IsCollapsed();
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
// Because there can be only one child frame, these two function return
// NS_ERROR_FAILURE
NS_IMETHOD AppendFrames(ChildListID aListID,
nsFrameList& aFrameList);
NS_IMETHOD InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList);
virtual void DestroyFrom(nsIFrame* aDestructRoot);
NS_IMETHOD RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame);
virtual nsIScrollableFrame* GetScrollTargetFrame() {
return this;
}
virtual nsIFrame* GetContentInsertionFrame() {
return mInner.GetScrolledFrame()->GetContentInsertionFrame();
}
virtual void InvalidateInternal(const nsRect& aDamageRect,
nscoord aX, nscoord aY, nsIFrame* aForChild,
PRUint32 aFlags);
virtual bool DoesClipChildren() { return true; }
virtual nsSplittableType GetSplittableType() const;
virtual nsPoint GetPositionOfChildIgnoringScrolling(nsIFrame* aChild)
{ nsPoint pt = aChild->GetPosition();
if (aChild == mInner.GetScrolledFrame()) pt += GetScrollPosition();
return pt;
}
// nsIAnonymousContentCreator
virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements);
virtual void AppendAnonymousContentTo(nsBaseContentList& aElements,
PRUint32 aFilter);
// nsIScrollableFrame
virtual nsIFrame* GetScrolledFrame() const {
return mInner.GetScrolledFrame();
}
virtual nsGfxScrollFrameInner::ScrollbarStyles GetScrollbarStyles() const {
return mInner.GetScrollbarStylesFromFrame();
}
virtual PRUint32 GetScrollbarVisibility() const {
return mInner.GetScrollbarVisibility();
}
virtual nsMargin GetActualScrollbarSizes() const {
return mInner.GetActualScrollbarSizes();
}
virtual nsMargin GetDesiredScrollbarSizes(nsBoxLayoutState* aState) {
return mInner.GetDesiredScrollbarSizes(aState);
}
virtual nsMargin GetDesiredScrollbarSizes(nsPresContext* aPresContext,
nsRenderingContext* aRC) {
nsBoxLayoutState bls(aPresContext, aRC, 0);
return GetDesiredScrollbarSizes(&bls);
}
virtual nsRect GetScrollPortRect() const {
return mInner.GetScrollPortRect();
}
virtual nsPoint GetScrollPosition() const {
return mInner.GetScrollPosition();
}
virtual nsRect GetScrollRange() const {
return mInner.GetScrollRange();
}
virtual nsSize GetLineScrollAmount() const {
return mInner.GetLineScrollAmount();
}
virtual nsSize GetPageScrollAmount() const {
return mInner.GetPageScrollAmount();
}
virtual void ScrollTo(nsPoint aScrollPosition, ScrollMode aMode) {
mInner.ScrollTo(aScrollPosition, aMode);
}
virtual void ScrollBy(nsIntPoint aDelta, ScrollUnit aUnit, ScrollMode aMode,
nsIntPoint* aOverflow, nsIAtom *aOrigin = nsnull) {
mInner.ScrollBy(aDelta, aUnit, aMode, aOverflow, aOrigin);
}
virtual void ScrollToRestoredPosition() {
mInner.ScrollToRestoredPosition();
}
virtual void AddScrollPositionListener(nsIScrollPositionListener* aListener) {
mInner.AddScrollPositionListener(aListener);
}
virtual void RemoveScrollPositionListener(nsIScrollPositionListener* aListener) {
mInner.RemoveScrollPositionListener(aListener);
}
virtual nsIBox* GetScrollbarBox(bool aVertical) {
return mInner.GetScrollbarBox(aVertical);
}
virtual void CurPosAttributeChanged(nsIContent* aChild) {
mInner.CurPosAttributeChanged(aChild);
}
NS_IMETHOD PostScrolledAreaEventForCurrentArea() {
mInner.PostScrolledAreaEvent();
return NS_OK;
}
virtual bool IsScrollingActive() {
return mInner.IsScrollingActive();
}
virtual bool UpdateOverflow() {
return mInner.UpdateOverflow();
}
// nsIStatefulFrame
NS_IMETHOD SaveState(SpecialStateID aStateID, nsPresState** aState) {
NS_ENSURE_ARG_POINTER(aState);
*aState = mInner.SaveState(aStateID);
return NS_OK;
}
NS_IMETHOD RestoreState(nsPresState* aState) {
NS_ENSURE_ARG_POINTER(aState);
mInner.RestoreState(aState);
return NS_OK;
}
/**
* Get the "type" of the frame
*
* @see nsGkAtoms::scrollFrame
*/
virtual nsIAtom* GetType() const;
#ifdef NS_DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
bool DidHistoryRestore() { return mInner.mDidHistoryRestore; }
#ifdef ACCESSIBILITY
virtual already_AddRefed<nsAccessible> CreateAccessible();
#endif
protected:
nsHTMLScrollFrame(nsIPresShell* aShell, nsStyleContext* aContext, bool aIsRoot);
virtual PRIntn GetSkipSides() const;
void SetSuppressScrollbarUpdate(bool aSuppress) {
mInner.mSupppressScrollbarUpdate = aSuppress;
}
bool GuessHScrollbarNeeded(const ScrollReflowState& aState);
bool GuessVScrollbarNeeded(const ScrollReflowState& aState);
bool IsScrollbarUpdateSuppressed() const {
return mInner.mSupppressScrollbarUpdate;
}
// Return whether we're in an "initial" reflow. Some reflows with
// NS_FRAME_FIRST_REFLOW set are NOT "initial" as far as we're concerned.
bool InInitialReflow() const;
/**
* Override this to return false if computed height/min-height/max-height
* should NOT be propagated to child content.
* nsListControlFrame uses this.
*/
virtual bool ShouldPropagateComputedHeightToScrolledContent() const { return true; }
private:
friend class nsGfxScrollFrameInner;
nsGfxScrollFrameInner mInner;
};
/**
* The scroll frame creates and manages the scrolling view
*
* It only supports having a single child frame that typically is an area
* frame, but doesn't have to be. The child frame must have a view, though
*
* Scroll frames don't support incremental changes, i.e. you can't replace
* or remove the scrolled frame
*/
class nsXULScrollFrame : public nsBoxFrame,
public nsIScrollableFrame,
public nsIAnonymousContentCreator,
public nsIStatefulFrame {
public:
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS
friend nsIFrame* NS_NewXULScrollFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, bool aIsRoot);
// Called to set the child frames. We typically have three: the scroll area,
// the vertical scrollbar, and the horizontal scrollbar.
NS_IMETHOD SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList);
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) {
return mInner.BuildDisplayList(aBuilder, aDirtyRect, aLists);
}
// XXXldb Is this actually used?
#if 0
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
#endif
// Because there can be only one child frame, these two function return
// NS_ERROR_FAILURE
NS_IMETHOD AppendFrames(ChildListID aListID,
nsFrameList& aFrameList);
NS_IMETHOD InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList);
virtual void DestroyFrom(nsIFrame* aDestructRoot);
NS_IMETHOD RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame);
virtual nsIScrollableFrame* GetScrollTargetFrame() {
return this;
}
virtual nsIFrame* GetContentInsertionFrame() {
return mInner.GetScrolledFrame()->GetContentInsertionFrame();
}
virtual void InvalidateInternal(const nsRect& aDamageRect,
nscoord aX, nscoord aY, nsIFrame* aForChild,
PRUint32 aFlags);
virtual bool DoesClipChildren() { return true; }
virtual nsSplittableType GetSplittableType() const;
virtual nsPoint GetPositionOfChildIgnoringScrolling(nsIFrame* aChild)
{ nsPoint pt = aChild->GetPosition();
if (aChild == mInner.GetScrolledFrame())
pt += mInner.GetLogicalScrollPosition();
return pt;
}
// nsIAnonymousContentCreator
virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements);
virtual void AppendAnonymousContentTo(nsBaseContentList& aElements,
PRUint32 aFilter);
virtual nsSize GetMinSize(nsBoxLayoutState& aBoxLayoutState);
virtual nsSize GetPrefSize(nsBoxLayoutState& aBoxLayoutState);
virtual nsSize GetMaxSize(nsBoxLayoutState& aBoxLayoutState);
virtual nscoord GetBoxAscent(nsBoxLayoutState& aBoxLayoutState);
NS_IMETHOD DoLayout(nsBoxLayoutState& aBoxLayoutState);
NS_IMETHOD GetPadding(nsMargin& aPadding);
virtual bool GetBorderRadii(nscoord aRadii[8]) const {
return mInner.GetBorderRadii(aRadii);
}
nsresult Layout(nsBoxLayoutState& aState);
void LayoutScrollArea(nsBoxLayoutState& aState, const nsPoint& aScrollPosition);
static bool AddRemoveScrollbar(bool& aHasScrollbar,
nscoord& aXY,
nscoord& aSize,
nscoord aSbSize,
bool aOnRightOrBottom,
bool aAdd);
bool AddRemoveScrollbar(nsBoxLayoutState& aState,
bool aOnRightOrBottom,
bool aHorizontal,
bool aAdd);
bool AddHorizontalScrollbar (nsBoxLayoutState& aState, bool aOnBottom);
bool AddVerticalScrollbar (nsBoxLayoutState& aState, bool aOnRight);
void RemoveHorizontalScrollbar(nsBoxLayoutState& aState, bool aOnBottom);
void RemoveVerticalScrollbar (nsBoxLayoutState& aState, bool aOnRight);
static void AdjustReflowStateForPrintPreview(nsBoxLayoutState& aState, bool& aSetBack);
static void AdjustReflowStateBack(nsBoxLayoutState& aState, bool aSetBack);
// nsIScrollableFrame
virtual nsIFrame* GetScrolledFrame() const {
return mInner.GetScrolledFrame();
}
virtual nsGfxScrollFrameInner::ScrollbarStyles GetScrollbarStyles() const {
return mInner.GetScrollbarStylesFromFrame();
}
virtual PRUint32 GetScrollbarVisibility() const {
return mInner.GetScrollbarVisibility();
}
virtual nsMargin GetActualScrollbarSizes() const {
return mInner.GetActualScrollbarSizes();
}
virtual nsMargin GetDesiredScrollbarSizes(nsBoxLayoutState* aState) {
return mInner.GetDesiredScrollbarSizes(aState);
}
virtual nsMargin GetDesiredScrollbarSizes(nsPresContext* aPresContext,
nsRenderingContext* aRC) {
nsBoxLayoutState bls(aPresContext, aRC, 0);
return GetDesiredScrollbarSizes(&bls);
}
virtual nsRect GetScrollPortRect() const {
return mInner.GetScrollPortRect();
}
virtual nsPoint GetScrollPosition() const {
return mInner.GetScrollPosition();
}
virtual nsRect GetScrollRange() const {
return mInner.GetScrollRange();
}
virtual nsSize GetLineScrollAmount() const {
return mInner.GetLineScrollAmount();
}
virtual nsSize GetPageScrollAmount() const {
return mInner.GetPageScrollAmount();
}
virtual void ScrollTo(nsPoint aScrollPosition, ScrollMode aMode) {
mInner.ScrollTo(aScrollPosition, aMode);
}
virtual void ScrollBy(nsIntPoint aDelta, ScrollUnit aUnit, ScrollMode aMode,
nsIntPoint* aOverflow, nsIAtom *aOrigin = nsnull) {
mInner.ScrollBy(aDelta, aUnit, aMode, aOverflow, aOrigin);
}
virtual void ScrollToRestoredPosition() {
mInner.ScrollToRestoredPosition();
}
virtual void AddScrollPositionListener(nsIScrollPositionListener* aListener) {
mInner.AddScrollPositionListener(aListener);
}
virtual void RemoveScrollPositionListener(nsIScrollPositionListener* aListener) {
mInner.RemoveScrollPositionListener(aListener);
}
virtual nsIBox* GetScrollbarBox(bool aVertical) {
return mInner.GetScrollbarBox(aVertical);
}
virtual void CurPosAttributeChanged(nsIContent* aChild) {
mInner.CurPosAttributeChanged(aChild);
}
NS_IMETHOD PostScrolledAreaEventForCurrentArea() {
mInner.PostScrolledAreaEvent();
return NS_OK;
}
virtual bool IsScrollingActive() {
return mInner.IsScrollingActive();
}
virtual bool UpdateOverflow() {
return mInner.UpdateOverflow();
}
// nsIStatefulFrame
NS_IMETHOD SaveState(SpecialStateID aStateID, nsPresState** aState) {
NS_ENSURE_ARG_POINTER(aState);
*aState = mInner.SaveState(aStateID);
return NS_OK;
}
NS_IMETHOD RestoreState(nsPresState* aState) {
NS_ENSURE_ARG_POINTER(aState);
mInner.RestoreState(aState);
return NS_OK;
}
/**
* Get the "type" of the frame
*
* @see nsGkAtoms::scrollFrame
*/
virtual nsIAtom* GetType() const;
virtual bool IsFrameOfType(PRUint32 aFlags) const
{
// Override bogus IsFrameOfType in nsBoxFrame.
if (aFlags & (nsIFrame::eReplacedContainsBlock | nsIFrame::eReplaced))
return false;
return nsBoxFrame::IsFrameOfType(aFlags);
}
#ifdef NS_DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
protected:
nsXULScrollFrame(nsIPresShell* aShell, nsStyleContext* aContext, bool aIsRoot);
virtual PRIntn GetSkipSides() const;
void ClampAndSetBounds(nsBoxLayoutState& aState,
nsRect& aRect,
nsPoint aScrollPosition,
bool aRemoveOverflowAreas = false) {
/*
* For RTL frames, restore the original scrolled position of the right
* edge, then subtract the current width to find the physical position.
* This can break the invariant that the scroll position is a multiple of
* device pixels, so round off the result to the nearest device pixel.
*/
if (!mInner.IsLTR()) {
aRect.x = PresContext()->RoundAppUnitsToNearestDevPixels(
mInner.mScrollPort.XMost() - aScrollPosition.x - aRect.width);
}
mInner.mScrolledFrame->SetBounds(aState, aRect, aRemoveOverflowAreas);
}
private:
friend class nsGfxScrollFrameInner;
nsGfxScrollFrameInner mInner;
};
#endif /* nsGfxScrollFrame_h___ */
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