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gecko-dev/layout/forms/nsComboboxControlFrame.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.org 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):
* Dean Tessman <dean_tessman@hotmail.com>
* Mats Palmgren <mats.palmgren@bredband.net>
*
* 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 nsComboboxControlFrame_h___
#define nsComboboxControlFrame_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
//#define DO_NEW_REFLOW
#endif
//Mark used to indicate when onchange has been fired for current combobox item
#define NS_SKIP_NOTIFY_INDEX -2
#include "nsAreaFrame.h"
#include "nsIFormControlFrame.h"
#include "nsIComboboxControlFrame.h"
#include "nsIAnonymousContentCreator.h"
#include "nsISelectControlFrame.h"
#include "nsIRollupListener.h"
#include "nsPresState.h"
#include "nsCSSFrameConstructor.h"
#include "nsIScrollableViewProvider.h"
#include "nsIStatefulFrame.h"
#include "nsIDOMMouseListener.h"
#include "nsThreadUtils.h"
class nsIView;
class nsStyleContext;
class nsIListControlFrame;
class nsIScrollableView;
class nsComboboxDisplayFrame;
/**
* Child list name indices
* @see #GetAdditionalChildListName()
*/
#define NS_COMBO_FRAME_POPUP_LIST_INDEX (NS_BLOCK_FRAME_ABSOLUTE_LIST_INDEX + 1)
class nsComboboxControlFrame : public nsAreaFrame,
public nsIFormControlFrame,
public nsIComboboxControlFrame,
public nsIAnonymousContentCreator,
public nsISelectControlFrame,
public nsIRollupListener,
public nsIScrollableViewProvider,
public nsIStatefulFrame
{
public:
friend nsIFrame* NS_NewComboboxControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, PRUint32 aFlags);
friend class nsComboboxDisplayFrame;
nsComboboxControlFrame(nsStyleContext* aContext);
~nsComboboxControlFrame();
// nsISupports
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
// nsIAnonymousContentCreator
NS_IMETHOD CreateAnonymousContent(nsPresContext* aPresContext,
nsISupportsArray& aChildList);
NS_IMETHOD CreateFrameFor(nsPresContext* aPresContext,
nsIContent * aContent,
nsIFrame** aFrame);
#ifdef ACCESSIBILITY
NS_IMETHOD GetAccessible(nsIAccessible** aAccessible);
#endif
virtual nscoord GetMinWidth(nsIRenderingContext *aRenderingContext);
virtual nscoord GetPrefWidth(nsIRenderingContext *aRenderingContext);
NS_IMETHOD Reflow(nsPresContext* aCX,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD HandleEvent(nsPresContext* aPresContext,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
void PaintFocus(nsIRenderingContext& aRenderingContext, nsPoint aPt);
// XXXbz this is only needed to prevent the quirk percent height stuff from
// leaking out of the combobox. We may be able to get rid of this as more
// things move to IsFrameOfType.
virtual nsIAtom* GetType() const;
virtual PRBool IsFrameOfType(PRUint32 aFlags) const;
#ifdef NS_DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
virtual void Destroy();
virtual nsIFrame* GetFirstChild(nsIAtom* aListName) const;
NS_IMETHOD SetInitialChildList(nsIAtom* aListName,
nsIFrame* aChildList);
virtual nsIAtom* GetAdditionalChildListName(PRInt32 aIndex) const;
virtual nsIFrame* GetContentInsertionFrame();
// nsIFormControlFrame
virtual nsresult SetFormProperty(nsIAtom* aName, const nsAString& aValue);
virtual nsresult GetFormProperty(nsIAtom* aName, nsAString& aValue) const;
virtual void SetFocus(PRBool aOn, PRBool aRepaint);
//nsIComboboxControlFrame
virtual PRBool IsDroppedDown() { return mDroppedDown; }
virtual void ShowDropDown(PRBool aDoDropDown);
virtual nsIFrame* GetDropDown();
virtual void SetDropDown(nsIFrame* aDropDownFrame);
virtual void RollupFromList();
virtual void AbsolutelyPositionDropDown();
virtual PRInt32 GetIndexOfDisplayArea();
NS_IMETHOD RedisplaySelectedText();
virtual PRInt32 UpdateRecentIndex(PRInt32 aIndex);
virtual void OnContentReset();
// nsISelectControlFrame
NS_IMETHOD AddOption(nsPresContext* aPresContext, PRInt32 index);
NS_IMETHOD RemoveOption(nsPresContext* aPresContext, PRInt32 index);
NS_IMETHOD GetOptionSelected(PRInt32 aIndex, PRBool* aValue);
NS_IMETHOD DoneAddingChildren(PRBool aIsDone);
NS_IMETHOD OnOptionSelected(nsPresContext* aPresContext,
PRInt32 aIndex,
PRBool aSelected);
NS_IMETHOD OnSetSelectedIndex(PRInt32 aOldIndex, PRInt32 aNewIndex);
//nsIRollupListener
// NS_DECL_NSIROLLUPLISTENER
NS_IMETHOD Rollup();
// a combobox should roll up if a mousewheel event happens outside of
// the popup area
NS_IMETHOD ShouldRollupOnMouseWheelEvent(PRBool *aShouldRollup)
{ *aShouldRollup = PR_TRUE; return NS_OK;}
//NS_IMETHOD ShouldRollupOnMouseWheelEvent(nsIWidget *aWidget, PRBool *aShouldRollup)
//{ *aShouldRollup = PR_FALSE; return NS_OK;}
// a combobox should not roll up if activated by a mouse activate message (eg. X-mouse)
NS_IMETHOD ShouldRollupOnMouseActivate(PRBool *aShouldRollup)
{ *aShouldRollup = PR_FALSE; return NS_OK;}
// nsIScrollableViewProvider
virtual nsIScrollableView* GetScrollableView();
//nsIStatefulFrame
NS_IMETHOD SaveState(SpecialStateID aStateID, nsPresState** aState);
NS_IMETHOD RestoreState(nsPresState* aState);
static PRBool ToolkitHasNativePopup();
protected:
// Utilities
nsresult ReflowDropdown(nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState);
public:
nsresult PositionDropdown(nsPresContext* aPresContext,
nscoord aHeight,
nsRect aAbsoluteTwipsRect,
nsRect aAbsolutePixelRect);
protected:
class RedisplayTextEvent;
friend class RedisplayTextEvent;
class RedisplayTextEvent : public nsRunnable {
public:
NS_DECL_NSIRUNNABLE
RedisplayTextEvent(nsComboboxControlFrame *c) : mControlFrame(c) {}
void Revoke() { mControlFrame = nsnull; }
private:
nsComboboxControlFrame *mControlFrame;
};
void ShowPopup(PRBool aShowPopup);
void ShowList(nsPresContext* aPresContext, PRBool aShowList);
void CheckFireOnChange();
void FireValueChangeEvent();
nsresult RedisplayText(PRInt32 aIndex);
void HandleRedisplayTextEvent();
void ActuallyDisplayText(PRBool aNotify);
NS_IMETHOD ToggleList(nsPresContext* aPresContext);
nsFrameList mPopupFrames; // additional named child list
nsCOMPtr<nsIContent> mDisplayContent; // Anonymous content used to display the current selection
nsIFrame* mDisplayFrame; // frame to display selection
nsIFrame* mButtonFrame; // button frame
nsIFrame* mDropdownFrame; // dropdown list frame
nsIFrame* mTextFrame; // display area frame
nsIListControlFrame * mListControlFrame; // ListControl Interface for the dropdown frame
// The width of our display area. Used by that frame's reflow to
// size to the full width except the drop-marker.
nscoord mDisplayWidth;
PRPackedBool mDroppedDown; // Current state of the dropdown list, PR_TRUE is dropped down
PRPackedBool mInRedisplayText;
nsRevocableEventPtr<RedisplayTextEvent> mRedisplayTextEvent;
PRInt32 mRecentSelectedIndex;
PRInt32 mDisplayedIndex;
nsString mDisplayedOptionText;
// make someone to listen to the button. If its programmatically pressed by someone like Accessibility
// then open or close the combo box.
nsCOMPtr<nsIDOMMouseListener> mButtonListener;
// static class data member for Bug 32920
// only one control can be focused at a time
static nsComboboxControlFrame * mFocused;
#ifdef DO_REFLOW_COUNTER
PRInt32 mReflowId;
#endif
private:
NS_IMETHOD_(nsrefcnt) AddRef() { return NS_OK; }
NS_IMETHOD_(nsrefcnt) Release() { return NS_OK; }
};
#endif
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