зеркало из https://github.com/mozilla/pjs.git
489 строки
18 KiB
C++
489 строки
18 KiB
C++
/* -*- 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 ***** */
|
|
#ifndef nsGfxScrollFrame_h___
|
|
#define nsGfxScrollFrame_h___
|
|
|
|
#include "nsHTMLContainerFrame.h"
|
|
#include "nsIAnonymousContentCreator.h"
|
|
#include "nsBoxFrame.h"
|
|
#include "nsIScrollableFrame.h"
|
|
#include "nsIScrollPositionListener.h"
|
|
#include "nsIStatefulFrame.h"
|
|
#include "nsGUIEvent.h"
|
|
#include "nsIEventQueue.h"
|
|
|
|
class nsISupportsArray;
|
|
class nsIScrollableView;
|
|
class nsPresContext;
|
|
class nsIPresShell;
|
|
class nsIContent;
|
|
class nsIAtom;
|
|
class nsIDocument;
|
|
class nsIScrollFrameInternal;
|
|
class nsPresState;
|
|
struct ScrollReflowState;
|
|
|
|
class nsGfxScrollFrameInner : public nsIScrollPositionListener {
|
|
public:
|
|
NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
|
|
NS_IMETHOD_(nsrefcnt) AddRef(void);
|
|
NS_IMETHOD_(nsrefcnt) Release(void);
|
|
|
|
nsGfxScrollFrameInner(nsContainerFrame* aOuter, PRBool 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();
|
|
PRBool NeedsClipWidget() const;
|
|
void CreateScrollableView();
|
|
|
|
void CreateAnonymousContent(nsISupportsArray& aAnonymousChildren);
|
|
void PostScrollPortEvent(PRBool aOverflow, nsScrollPortEvent::orientType aType);
|
|
void PostOverflowEvents();
|
|
|
|
nsresult BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists);
|
|
|
|
// nsIScrollPositionListener
|
|
|
|
NS_IMETHOD ScrollPositionWillChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY);
|
|
NS_IMETHOD ScrollPositionDidChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY);
|
|
|
|
// This gets called when the 'curpos' attribute on one of the scrollbars changes
|
|
void CurPosAttributeChanged(nsIContent* aChild, PRInt32 aModType);
|
|
void PostScrollEvent();
|
|
void FireScrollEvent();
|
|
|
|
void SetScrollbarEnabled(nsIBox* aBox, nscoord aMaxPos, PRBool aReflow=PR_TRUE);
|
|
PRBool SetAttribute(nsIBox* aBox, nsIAtom* aAtom, nscoord aSize, PRBool aReflow=PR_TRUE);
|
|
PRInt32 GetIntegerAttribute(nsIBox* aFrame, nsIAtom* atom, PRInt32 defaultValue);
|
|
|
|
/**
|
|
* If RTL, then this will scroll to the right during initial layout.
|
|
*/
|
|
void AdjustHorizontalScrollbar();
|
|
|
|
// Like ScrollPositionDidChange, but initiated by this frame rather than from the
|
|
// scrolling view
|
|
void InternalScrollPositionDidChange(nscoord aX, nscoord aY);
|
|
|
|
nsIScrollableView* GetScrollableView() const { return mScrollableView; }
|
|
|
|
nsIView* GetParentViewForChildFrame(nsIFrame* aFrame) const;
|
|
|
|
void ScrollToRestoredPosition();
|
|
|
|
nsPresState* SaveState(nsIStatefulFrame::SpecialStateID aStateID);
|
|
void RestoreState(nsPresState* aState);
|
|
void SaveVScrollbarStateToGlobalHistory();
|
|
nsresult GetVScrollbarHintFromGlobalHistory(PRBool* aVScrollbarNeeded);
|
|
|
|
nsIFrame* GetScrolledFrame() const { return mScrolledFrame; }
|
|
|
|
void ScrollbarChanged(nsPresContext* aPresContext, nscoord aX, nscoord aY, PRUint32 aFlags);
|
|
|
|
static void SetScrollbarVisibility(nsIBox* aScrollbar, PRBool aVisible);
|
|
|
|
nsSize GetScrolledSize() const;
|
|
nsMargin GetActualScrollbarSizes() const;
|
|
nsMargin GetDesiredScrollbarSizes(nsBoxLayoutState* aState);
|
|
PRBool IsScrollbarOnRight();
|
|
void LayoutScrollbars(nsBoxLayoutState& aState,
|
|
const nsRect& aContentArea,
|
|
const nsRect& aOldScrollArea,
|
|
const nsRect& aScrollArea);
|
|
|
|
nsCOMPtr<nsIEventQueue> mScrollEventQueue;
|
|
nsIScrollableView* mScrollableView;
|
|
nsIBox* mHScrollbarBox;
|
|
nsIBox* mVScrollbarBox;
|
|
nsIFrame* mScrolledFrame;
|
|
nsIBox* mScrollCornerBox;
|
|
nsContainerFrame* mOuter;
|
|
nscoord mOnePixel;
|
|
|
|
nsRect mRestoreRect;
|
|
nsPoint mLastPos;
|
|
|
|
// The last dir value we saw in AddHorizontalScrollbar. Use PRInt16
|
|
// so we can fit all the possible values of a PRUint8 and have a -1
|
|
// value that indicates "not set")
|
|
PRInt16 mLastDir;
|
|
|
|
PRPackedBool mNeverHasVerticalScrollbar:1;
|
|
PRPackedBool mNeverHasHorizontalScrollbar:1;
|
|
PRPackedBool mHasVerticalScrollbar:1;
|
|
PRPackedBool mHasHorizontalScrollbar:1;
|
|
PRPackedBool mViewInitiatedScroll:1;
|
|
PRPackedBool mFrameInitiatedScroll:1;
|
|
PRPackedBool mDidHistoryRestore:1;
|
|
// Is this the scrollframe for the document's viewport?
|
|
PRPackedBool mIsRoot:1;
|
|
PRPackedBool mSupppressScrollbarUpdate:1;
|
|
// Did we load a hint from global history
|
|
// about whether a vertical scrollbar is required?
|
|
PRPackedBool mDidLoadHistoryVScrollbarHint:1;
|
|
// The value of the hint loaded
|
|
PRPackedBool mHistoryVScrollbarHint:1;
|
|
PRPackedBool mHadNonInitialReflow:1;
|
|
// State used only by PostScrollEvents so we know
|
|
// which overflow states have changed.
|
|
PRPackedBool mHorizontalOverflow:1;
|
|
PRPackedBool mVerticalOverflow:1;
|
|
};
|
|
|
|
/**
|
|
* 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 nsHTMLContainerFrame,
|
|
public nsIScrollableFrame,
|
|
public nsIAnonymousContentCreator,
|
|
public nsIStatefulFrame {
|
|
public:
|
|
friend nsIFrame* NS_NewHTMLScrollFrame(nsIPresShell* aPresShell, PRBool aIsRoot);
|
|
|
|
NS_DECL_ISUPPORTS
|
|
|
|
// Called to set the child frames. We typically have three: the scroll area,
|
|
// the vertical scrollbar, and the horizontal scrollbar.
|
|
NS_IMETHOD SetInitialChildList(nsPresContext* aPresContext,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aChildList);
|
|
|
|
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists) {
|
|
return mInner.BuildDisplayList(aBuilder, aDirtyRect, aLists);
|
|
}
|
|
|
|
PRBool TryLayout(ScrollReflowState* aState,
|
|
const nsHTMLReflowMetrics& aKidMetrics,
|
|
PRBool aAssumeVScroll, PRBool aAssumeHScroll,
|
|
PRBool aForce);
|
|
nsresult ReflowScrolledFrame(const ScrollReflowState& aState,
|
|
PRBool aAssumeHScroll,
|
|
PRBool aAssumeVScroll,
|
|
nsHTMLReflowMetrics* aMetrics,
|
|
PRBool aFirstPass);
|
|
nsresult ReflowContents(ScrollReflowState* aState,
|
|
const nsHTMLReflowMetrics& aDesiredSize);
|
|
PRBool IsRTLTextControl();
|
|
void PlaceScrollArea(const ScrollReflowState& aState);
|
|
|
|
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(nsIAtom* aListName,
|
|
nsIFrame* aFrameList);
|
|
NS_IMETHOD InsertFrames(nsIAtom* aListName,
|
|
nsIFrame* aPrevFrame,
|
|
nsIFrame* aFrameList);
|
|
|
|
NS_IMETHOD Destroy(nsPresContext* aPresContext);
|
|
|
|
NS_IMETHOD RemoveFrame(nsIAtom* aListName,
|
|
nsIFrame* aOldFrame);
|
|
|
|
virtual nsIView* GetParentViewForChildFrame(nsIFrame* aFrame) const {
|
|
return mInner.GetParentViewForChildFrame(aFrame);
|
|
}
|
|
|
|
virtual nsIFrame* GetContentInsertionFrame() {
|
|
return mInner.GetScrolledFrame()->GetContentInsertionFrame();
|
|
}
|
|
|
|
virtual nsIView* GetMouseCapturer() const {
|
|
return mInner.GetScrolledFrame()->GetView();
|
|
}
|
|
|
|
virtual PRBool NeedsView() { return PR_TRUE; }
|
|
virtual PRBool DoesClipChildren() { return PR_TRUE; }
|
|
|
|
// nsIAnonymousContentCreator
|
|
NS_IMETHOD CreateAnonymousContent(nsPresContext* aPresContext,
|
|
nsISupportsArray& aAnonymousItems);
|
|
NS_IMETHOD CreateFrameFor(nsPresContext* aPresContext,
|
|
nsIContent * aContent,
|
|
nsIFrame** aFrame) { if (aFrame) *aFrame = nsnull; return NS_ERROR_FAILURE; }
|
|
|
|
// nsIScrollableFrame
|
|
virtual nsIFrame* GetScrolledFrame() const;
|
|
virtual nsIScrollableView* GetScrollableView();
|
|
|
|
virtual nsPoint GetScrollPosition() const;
|
|
virtual void ScrollTo(nsPoint aScrollPosition, PRUint32 aFlags);
|
|
|
|
virtual void SetScrollbarVisibility(PRBool aVerticalVisible, PRBool aHorizontalVisible);
|
|
|
|
virtual nsIBox* GetScrollbarBox(PRBool aVertical);
|
|
|
|
virtual void CurPosAttributeChanged(nsIContent* aChild, PRInt32 aModType);
|
|
|
|
// 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;
|
|
}
|
|
|
|
virtual void ScrollToRestoredPosition() {
|
|
mInner.ScrollToRestoredPosition();
|
|
}
|
|
|
|
virtual nsMargin GetActualScrollbarSizes() const {
|
|
return mInner.GetActualScrollbarSizes();
|
|
}
|
|
virtual nsMargin GetDesiredScrollbarSizes(nsBoxLayoutState* aState);
|
|
virtual nsGfxScrollFrameInner::ScrollbarStyles GetScrollbarStyles() const;
|
|
|
|
/**
|
|
* Get the "type" of the frame
|
|
*
|
|
* @see nsLayoutAtoms::scrollFrame
|
|
*/
|
|
virtual nsIAtom* GetType() const;
|
|
|
|
#ifdef NS_DEBUG
|
|
NS_IMETHOD GetFrameName(nsAString& aResult) const;
|
|
#endif
|
|
|
|
virtual nsresult GetContentOf(nsIContent** aContent);
|
|
|
|
PRBool DidHistoryRestore() { return mInner.mDidHistoryRestore; }
|
|
|
|
#ifdef ACCESSIBILITY
|
|
NS_IMETHOD GetAccessible(nsIAccessible** aAccessible);
|
|
#endif
|
|
|
|
protected:
|
|
nsHTMLScrollFrame(nsIPresShell* aShell, PRBool aIsRoot);
|
|
virtual PRIntn GetSkipSides() const;
|
|
|
|
void SetSuppressScrollbarUpdate(PRBool aSuppress) {
|
|
mInner.mSupppressScrollbarUpdate = aSuppress;
|
|
}
|
|
PRBool GuessVScrollbarNeeded(const ScrollReflowState& aState);
|
|
|
|
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:
|
|
friend nsIFrame* NS_NewXULScrollFrame(nsIPresShell* aPresShell, PRBool aIsRoot);
|
|
|
|
// Called to set the child frames. We typically have three: the scroll area,
|
|
// the vertical scrollbar, and the horizontal scrollbar.
|
|
NS_IMETHOD SetInitialChildList(nsPresContext* aPresContext,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aChildList);
|
|
|
|
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists) {
|
|
return mInner.BuildDisplayList(aBuilder, aDirtyRect, aLists);
|
|
}
|
|
|
|
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(nsIAtom* aListName,
|
|
nsIFrame* aFrameList);
|
|
NS_IMETHOD InsertFrames(nsIAtom* aListName,
|
|
nsIFrame* aPrevFrame,
|
|
nsIFrame* aFrameList);
|
|
|
|
NS_IMETHOD Destroy(nsPresContext* aPresContext);
|
|
|
|
NS_IMETHOD RemoveFrame(nsIAtom* aListName,
|
|
nsIFrame* aOldFrame);
|
|
|
|
virtual nsIView* GetParentViewForChildFrame(nsIFrame* aFrame) const {
|
|
return mInner.GetParentViewForChildFrame(aFrame);
|
|
}
|
|
|
|
virtual nsIFrame* GetContentInsertionFrame() {
|
|
return mInner.GetScrolledFrame()->GetContentInsertionFrame();
|
|
}
|
|
|
|
virtual nsIView* GetMouseCapturer() const {
|
|
return mInner.GetScrolledFrame()->GetView();
|
|
}
|
|
|
|
virtual PRBool NeedsView() { return PR_TRUE; }
|
|
virtual PRBool DoesClipChildren() { return PR_TRUE; }
|
|
|
|
// nsIAnonymousContentCreator
|
|
NS_IMETHOD CreateAnonymousContent(nsPresContext* aPresContext,
|
|
nsISupportsArray& aAnonymousItems);
|
|
NS_IMETHOD CreateFrameFor(nsPresContext* aPresContext,
|
|
nsIContent * aContent,
|
|
nsIFrame** aFrame) { if (aFrame) *aFrame = nsnull; return NS_ERROR_FAILURE; }
|
|
|
|
// nsIBox methods
|
|
NS_DECL_ISUPPORTS
|
|
|
|
NS_IMETHOD GetPrefSize(nsBoxLayoutState& aBoxLayoutState, nsSize& aSize);
|
|
NS_IMETHOD GetMinSize(nsBoxLayoutState& aBoxLayoutState, nsSize& aSize);
|
|
NS_IMETHOD GetMaxSize(nsBoxLayoutState& aBoxLayoutState, nsSize& aSize);
|
|
NS_IMETHOD GetAscent(nsBoxLayoutState& aBoxLayoutState, nscoord& aAscent);
|
|
|
|
NS_IMETHOD DoLayout(nsBoxLayoutState& aBoxLayoutState);
|
|
NS_IMETHOD GetPadding(nsMargin& aPadding);
|
|
|
|
nsresult Layout(nsBoxLayoutState& aState);
|
|
void LayoutScrollArea(nsBoxLayoutState& aState, const nsRect& aRect);
|
|
|
|
static PRBool AddRemoveScrollbar(PRBool& aHasScrollbar,
|
|
nscoord& aXY,
|
|
nscoord& aSize,
|
|
nscoord aSbSize,
|
|
PRBool aOnRightOrBottom,
|
|
PRBool aAdd);
|
|
|
|
PRBool AddRemoveScrollbar(nsBoxLayoutState& aState,
|
|
nsRect& aScrollAreaSize,
|
|
PRBool aOnTop,
|
|
PRBool aHorizontal,
|
|
PRBool aAdd);
|
|
|
|
PRBool AddHorizontalScrollbar (nsBoxLayoutState& aState, nsRect& aScrollAreaSize, PRBool aOnBottom);
|
|
PRBool AddVerticalScrollbar (nsBoxLayoutState& aState, nsRect& aScrollAreaSize, PRBool aOnRight);
|
|
void RemoveHorizontalScrollbar(nsBoxLayoutState& aState, nsRect& aScrollAreaSize, PRBool aOnBottom);
|
|
void RemoveVerticalScrollbar (nsBoxLayoutState& aState, nsRect& aScrollAreaSize, PRBool aOnRight);
|
|
|
|
static void AdjustReflowStateForPrintPreview(nsBoxLayoutState& aState, PRBool& aSetBack);
|
|
static void AdjustReflowStateBack(nsBoxLayoutState& aState, PRBool aSetBack);
|
|
|
|
// nsIScrollableFrame
|
|
virtual nsIFrame* GetScrolledFrame() const;
|
|
virtual nsIScrollableView* GetScrollableView();
|
|
|
|
virtual nsPoint GetScrollPosition() const;
|
|
virtual void ScrollTo(nsPoint aScrollPosition, PRUint32 aFlags);
|
|
|
|
virtual void SetScrollbarVisibility(PRBool aVerticalVisible, PRBool aHorizontalVisible);
|
|
|
|
virtual nsIBox* GetScrollbarBox(PRBool aVertical);
|
|
|
|
virtual void CurPosAttributeChanged(nsIContent* aChild, PRInt32 aModType);
|
|
|
|
// 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;
|
|
}
|
|
|
|
virtual void ScrollToRestoredPosition() {
|
|
mInner.ScrollToRestoredPosition();
|
|
}
|
|
|
|
virtual nsMargin GetActualScrollbarSizes() const {
|
|
return mInner.GetActualScrollbarSizes();
|
|
}
|
|
virtual nsMargin GetDesiredScrollbarSizes(nsBoxLayoutState* aState);
|
|
virtual nsGfxScrollFrameInner::ScrollbarStyles GetScrollbarStyles() const;
|
|
|
|
/**
|
|
* Get the "type" of the frame
|
|
*
|
|
* @see nsLayoutAtoms::scrollFrame
|
|
*/
|
|
virtual nsIAtom* GetType() const;
|
|
|
|
#ifdef NS_DEBUG
|
|
NS_IMETHOD GetFrameName(nsAString& aResult) const;
|
|
#endif
|
|
|
|
virtual nsresult GetContentOf(nsIContent** aContent);
|
|
|
|
protected:
|
|
nsXULScrollFrame(nsIPresShell* aShell, PRBool aIsRoot);
|
|
virtual PRIntn GetSkipSides() const;
|
|
|
|
private:
|
|
friend class nsGfxScrollFrameInner;
|
|
nsGfxScrollFrameInner mInner;
|
|
nscoord mMaxElementWidth;
|
|
};
|
|
|
|
#endif /* nsGfxScrollFrame_h___ */
|