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gecko-dev/layout/forms/nsListControlFrame.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape 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/NPL/
*
* 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 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 NPL, 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 NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsListControlFrame_h___
#define nsListControlFrame_h___
#ifdef DEBUG_evaughan
//#define DEBUG_rods
#endif
#ifdef DEBUG_rods
//#define DO_REFLOW_DEBUG
//#define DO_REFLOW_COUNTER
//#define DO_UNCONSTRAINED_CHECK
//#define DO_PIXELS
#endif
#include "nsScrollFrame.h"
#include "nsIFormControlFrame.h"
#include "nsIListControlFrame.h"
#include "nsISelectControlFrame.h"
#include "nsIDOMMouseListener.h"
#include "nsIDOMMouseMotionListener.h"
#include "nsIDOMKeyListener.h"
#include "nsIPresState.h"
#include "nsCWeakReference.h"
#include "nsIContent.h"
class nsIDOMHTMLSelectElement;
class nsIDOMHTMLCollection;
class nsIDOMHTMLOptionElement;
class nsIComboboxControlFrame;
class nsIViewManager;
class nsIPresContext;
class nsVoidArray;
class nsIScrollableView;
class nsListControlFrame;
class nsSelectUpdateTimer;
class nsVoidArray;
#define NS_ILIST_EVENT_LISTENER_IID \
{/* 45BC6821-6EFB-11d4-B1EE-000064657374*/ \
0x45bc6821, 0x6efb, 0x11d4, \
{0xb1, 0xee, 0x0, 0x0, 0x64, 0x65, 0x73, 0x74} }
/******************************************************************************
* nsIListEventListener
* Standard interface for event listeners that are attached to nsListControls
******************************************************************************/
class nsIListEventListener : public nsISupports
{
public:
NS_DEFINE_STATIC_IID_ACCESSOR(NS_ILIST_EVENT_LISTENER_IID)
/** SetFrame sets the frame we send event messages to, when necessary
* @param aFrame -- the frame, can be null, not ref counted (guaranteed to outlive us!)
*/
NS_IMETHOD SetFrame(nsListControlFrame *aFrame)=0;
};
/******************************************************************************
* nsListEventListener
* This class is responsible for propagating events to the nsListControlFrame
* becuase it isn't ref-counted
******************************************************************************/
class nsListEventListener; // forward declaration for factory
/* factory for ender key listener */
nsresult NS_NewListEventListener(nsIListEventListener ** aInstancePtrResult);
class nsListEventListener : public nsIListEventListener,
public nsIDOMKeyListener,
public nsIDOMMouseListener,
public nsIDOMMouseMotionListener
{
public:
/** the default destructor */
virtual ~nsListEventListener();
/** interfaces for addref and release and queryinterface*/
NS_DECL_ISUPPORTS
/** nsIDOMKeyListener interfaces
* @see nsIDOMKeyListener
*/
NS_IMETHOD SetFrame(nsListControlFrame *aFrame);
/** nsIDOMKeyListener interfaces
* @see nsIDOMKeyListener
*/
NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent);
NS_IMETHOD KeyDown(nsIDOMEvent* aKeyEvent);
NS_IMETHOD KeyUp(nsIDOMEvent* aKeyEvent);
NS_IMETHOD KeyPress(nsIDOMEvent* aKeyEvent);
/* END interfaces from nsIDOMKeyListener*/
/** nsIDOMMouseListener interfaces
* @see nsIDOMMouseListener
*/
NS_IMETHOD MouseDown(nsIDOMEvent* aMouseEvent);
NS_IMETHOD MouseUp(nsIDOMEvent* aMouseEvent);
NS_IMETHOD MouseClick(nsIDOMEvent* aMouseEvent);
NS_IMETHOD MouseDblClick(nsIDOMEvent* aMouseEvent);
NS_IMETHOD MouseOver(nsIDOMEvent* aMouseEvent);
NS_IMETHOD MouseOut(nsIDOMEvent* aMouseEvent);
/* END interfaces from nsIDOMMouseListener*/
//nsIDOMEventMotionListener
/** nsIDOMEventMotionListener interfaces
* @see nsIDOMEventMotionListener
*/
NS_IMETHOD MouseMove(nsIDOMEvent* aMouseEvent);
NS_IMETHOD DragMove(nsIDOMEvent* aMouseEvent);
/* END interfaces from nsIDOMMouseListener*/
friend nsresult NS_NewListEventListener(nsIListEventListener ** aInstancePtrResult);
protected:
/** the default constructor. Protected, use the factory to create an instance.
* @see NS_NewEnderEventListener
*/
nsListEventListener();
protected:
nsCWeakReference<nsListControlFrame> mFrame;
nsCOMPtr<nsIContent> mContent; // ref counted
};
/**
* Frame-based listbox.
*/
class nsListControlFrame : public nsScrollFrame,
public nsIFormControlFrame,
public nsIListControlFrame,
public nsIDOMMouseListener,
public nsIDOMMouseMotionListener,
public nsIDOMKeyListener,
public nsISelectControlFrame
{
public:
friend nsresult NS_NewListControlFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame);
friend class nsSelectUpdateTimer;
// nsISupports
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
// nsIFrame
NS_IMETHOD HandleEvent(nsIPresContext* aPresContext,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD SetInitialChildList(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList);
NS_IMETHOD Reflow(nsIPresContext* aCX,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow);
NS_IMETHOD DidReflow(nsIPresContext* aPresContext,
const nsHTMLReflowState* aReflowState,
nsDidReflowStatus aStatus);
NS_IMETHOD MoveTo(nsIPresContext* aPresContext, nscoord aX, nscoord aY);
NS_IMETHOD Destroy(nsIPresContext *aPresContext);
NS_IMETHOD Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags = 0);
/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::scrollFrame
*/
NS_IMETHOD GetFrameType(nsIAtom** aType) const;
#ifdef DEBUG
// nsIFrameDebug
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
// nsIFormControlFrame
NS_IMETHOD GetType(PRInt32* aType) const;
NS_IMETHOD GetName(nsAString* aName);
NS_IMETHOD SetProperty(nsIPresContext* aPresContext, nsIAtom* aName, const nsAString& aValue);
NS_IMETHOD GetProperty(nsIAtom* aName, nsAString& aValue);
NS_IMETHOD GetMultiple(PRBool* aResult, nsIDOMHTMLSelectElement* aSelect = nsnull);
NS_IMETHOD GetFont(nsIPresContext* aPresContext,
const nsFont*& aFont);
NS_IMETHOD GetFormContent(nsIContent*& aContent) const;
NS_IMETHOD OnContentReset();
virtual void SetFocus(PRBool aOn = PR_TRUE, PRBool aRepaint = PR_FALSE);
virtual void ScrollIntoView(nsIPresContext* aPresContext);
virtual void MouseClicked(nsIPresContext* aPresContext);
virtual nscoord GetVerticalInsidePadding(nsIPresContext* aPresContext,
float aPixToTwip,
nscoord aInnerHeight) const;
virtual nscoord GetHorizontalInsidePadding(nsIPresContext* aPresContext,
float aPixToTwip,
nscoord aInnerWidth,
nscoord aCharWidth) const;
virtual nsresult RequiresWidget(PRBool &aRequiresWidget);
// for accessibility purposes
#ifdef ACCESSIBILITY
NS_IMETHOD GetAccessible(nsIAccessible** aAccessible);
#endif
// nsHTMLContainerFrame
virtual PRIntn GetSkipSides() const;
// nsIListControlFrame
NS_IMETHOD SetComboboxFrame(nsIFrame* aComboboxFrame);
NS_IMETHOD GetSelectedIndex(PRInt32* aIndex);
NS_IMETHOD GetOptionText(PRInt32 aIndex, nsAString & aStr);
NS_IMETHOD CaptureMouseEvents(nsIPresContext* aPresContext, PRBool aGrabMouseEvents);
NS_IMETHOD GetMaximumSize(nsSize &aSize);
NS_IMETHOD SetSuggestedSize(nscoord aWidth, nscoord aHeight);
NS_IMETHOD GetNumberOfOptions(PRInt32* aNumOptions);
NS_IMETHOD SyncViewWithFrame(nsIPresContext* aPresContext);
NS_IMETHOD AboutToDropDown();
NS_IMETHOD AboutToRollup();
NS_IMETHOD UpdateSelection();
NS_IMETHOD SetOverrideReflowOptimization(PRBool aValue) { mOverrideReflowOpt = aValue; return NS_OK; }
NS_IMETHOD GetOptionsContainer(nsIPresContext* aPresContext, nsIFrame** aFrame);
NS_IMETHOD FireOnChange();
NS_IMETHOD ComboboxFinish(PRInt32 aIndex);
// nsISelectControlFrame
NS_IMETHOD AddOption(nsIPresContext* aPresContext, PRInt32 index);
NS_IMETHOD RemoveOption(nsIPresContext* aPresContext, PRInt32 index);
NS_IMETHOD GetOptionSelected(PRInt32 aIndex, PRBool* aValue);
NS_IMETHOD DoneAddingChildren(PRBool aIsDone);
NS_IMETHOD OnOptionSelected(nsIPresContext* aPresContext,
PRInt32 aIndex,
PRBool aSelected);
NS_IMETHOD OnOptionTextChanged(nsIDOMHTMLOptionElement* option);
NS_IMETHOD GetDummyFrame(nsIFrame** aFrame);
NS_IMETHOD SetDummyFrame(nsIFrame* aFrame);
//nsIDOMEventListener
NS_IMETHOD MouseDown(nsIDOMEvent* aMouseEvent);
NS_IMETHOD MouseUp(nsIDOMEvent* aMouseEvent);
NS_IMETHOD MouseClick(nsIDOMEvent* aMouseEvent) { return NS_OK; }
NS_IMETHOD MouseDblClick(nsIDOMEvent* aMouseEvent) { return NS_OK; }
NS_IMETHOD MouseOver(nsIDOMEvent* aMouseEvent) { return NS_OK; }
NS_IMETHOD MouseOut(nsIDOMEvent* aMouseEvent) { return NS_OK; }
NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent) { return NS_OK; }
//nsIDOMEventMotionListener
NS_IMETHOD MouseMove(nsIDOMEvent* aMouseEvent);
NS_IMETHOD DragMove(nsIDOMEvent* aMouseEvent);
//nsIDOMKeyListener
NS_IMETHOD KeyDown(nsIDOMEvent* aKeyEvent);
NS_IMETHOD KeyUp(nsIDOMEvent* aKeyEvent) { return NS_OK; }
NS_IMETHOD KeyPress(nsIDOMEvent* aKeyEvent);
// Static Methods
static nsIDOMHTMLSelectElement* GetSelect(nsIContent * aContent);
static nsIDOMHTMLCollection* GetOptions(nsIContent * aContent, nsIDOMHTMLSelectElement* aSelect = nsnull);
static nsIDOMHTMLOptionElement* GetOption(nsIDOMHTMLCollection& aOptions, PRInt32 aIndex);
static nsIContent* GetOptionAsContent(nsIDOMHTMLCollection* aCollection,PRInt32 aIndex);
static void ComboboxFocusSet();
// Weak Reference
nsCWeakReferent *WeakReferent()
{ return &mWeakReferent; }
// Helper
void SetPassId(PRInt16 aId) { mPassId = aId; }
void PaintFocus(nsIRenderingContext& aRC, nsFramePaintLayer aWhichLayer);
#ifdef ACCESSIBILITY
void FireMenuItemActiveEvent(); // Inform assistive tech what got focused
#endif
protected:
nsresult IsOptionDisabled(PRInt32 anIndex, PRBool &aIsDisabled);
nsresult ScrollToFrame(nsIContent * aOptElement);
nsresult ScrollToIndex(PRInt32 anIndex);
PRBool IsClickingInCombobox(nsIDOMEvent* aMouseEvent);
void AdjustIndexForDisabledOpt(PRInt32 aStartIndex, PRInt32 &anNewIndex,
PRInt32 aNumOptions, PRInt32 aDoAdjustInc, PRInt32 aDoAdjustIncNext);
virtual void ResetList(nsIPresContext* aPresContext, nsVoidArray * aInxList = nsnull);
nsListControlFrame();
virtual ~nsListControlFrame();
// nsScrollFrame overrides
// Override the widget created for the list box so a Borderless top level
// widget is created for drop-down lists.
virtual nsresult CreateScrollingViewWidget(nsIView* aView, const nsStyleDisplay* aDisplay);
virtual nsresult GetScrollingParentView(nsIPresContext* aPresContext,
nsIFrame* aParent,
nsIView** aParentView);
// Utility methods
nsresult GetSizeAttribute(PRInt32 *aSize);
nsIContent* GetOptionFromContent(nsIContent *aContent);
nsresult GetIndexFromDOMEvent(nsIDOMEvent* aMouseEvent, PRInt32& aCurIndex);
nsIContent* GetOptionContent(PRInt32 aIndex);
PRBool IsContentSelected(nsIContent* aContent);
PRBool IsContentSelectedByIndex(PRInt32 aIndex);
void GetViewOffset(nsIViewManager* aManager, nsIView* aView, nsPoint& aPoint);
PRBool IsOptionElement(nsIContent* aContent);
PRBool CheckIfAllFramesHere();
PRInt32 GetIndexFromContent(nsIContent *aContent);
PRBool IsLeftButton(nsIDOMEvent* aMouseEvent);
void GetScrollableView(nsIScrollableView*& aScrollableView);
// Dropped down stuff
void SetComboboxItem(PRInt32 aIndex);
PRBool IsInDropDownMode();
// Selection
PRBool SetOptionsSelectedFromFrame(PRInt32 aStartIndex,
PRInt32 aEndIndex,
PRBool aValue,
PRBool aClearAll);
PRBool ToggleOptionSelectedFromFrame(PRInt32 aIndex);
PRBool SingleSelection(PRInt32 aSelectedIndex, PRBool aDoToggle);
PRBool ExtendedSelection(PRInt32 aStartIndex,
PRInt32 aEndIndex,
PRBool aClearAll);
PRBool PerformSelection(PRInt32 aSelectedIndex,
PRBool aIsShift,
PRBool aIsControl);
PRBool HandleListSelection(nsIDOMEvent * aDOMEvent, PRInt32 selectedIndex);
// Timer Methods
nsresult StartUpdateTimer(nsIPresContext * aPresContext);
void StopUpdateTimer();
void ItemsHaveBeenRemoved(nsIPresContext * aPresContext);
// Data Members
PRInt32 mStartSelectionIndex;
PRInt32 mEndSelectionIndex;
PRPackedBool mChangesSinceDragStart;
PRInt32 mSelectedIndexWhenPoppedDown;
nsIComboboxControlFrame *mComboboxFrame;
PRPackedBool mButtonDown;
nscoord mMaxWidth;
nscoord mMaxHeight;
PRPackedBool mIsCapturingMouseEvents;
PRInt32 mNumDisplayRows;
PRBool mIsAllContentHere;
PRPackedBool mIsAllFramesHere;
PRPackedBool mHasBeenInitialized;
PRPackedBool mDoneWithInitialReflow;
PRPackedBool mOverrideReflowOpt;
nsIPresContext* mPresContext; // XXX: Remove the need to cache the pres context.
nsCOMPtr<nsIListEventListener> mEventListener; // ref counted
nsCWeakReferent mWeakReferent; // so this obj can be used as a weak ptr
// XXX temprary only until full system mouse capture works
PRPackedBool mIsScrollbarVisible;
PRInt16 mPassId;
nsSize mCachedDesiredMaxSize;
// Update timer
nsSelectUpdateTimer * mUpdateTimer;
nsIFrame* mDummyFrame;
//Resize Reflow OpitmizationSize;
nsSize mCacheSize;
nsSize mCachedMaxElementSize;
nsSize mCachedUnconstrainedSize;
nsSize mCachedAvailableSize;
static nsListControlFrame * mFocused;
#ifdef DO_REFLOW_COUNTER
PRInt32 mReflowId;
#endif
private:
NS_IMETHOD_(nsrefcnt) AddRef() { return NS_OK; }
NS_IMETHOD_(nsrefcnt) Release() { return NS_OK; }
// for incremental typing navigation
static nsAString& GetIncrementalString ();
static DOMTimeStamp gLastKeyTime;
};
#endif /* nsListControlFrame_h___ */
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