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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: 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):
* 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 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 "nsGfxScrollFrame.h"
#include "nsIFormControlFrame.h"
#include "nsIListControlFrame.h"
#include "nsISelectControlFrame.h"
#include "nsIDOMEventListener.h"
#include "nsIContent.h"
#include "nsAutoPtr.h"
#include "nsSelectsAreaFrame.h"
class nsIDOMHTMLSelectElement;
class nsIDOMHTMLOptionsCollection;
class nsIDOMHTMLOptionElement;
class nsIComboboxControlFrame;
class nsIViewManager;
class nsPresContext;
class nsVoidArray;
class nsIScrollableView;
class nsVoidArray;
class nsListEventListener;
/**
* Frame-based listbox.
*/
class nsListControlFrame : public nsHTMLScrollFrame,
public nsIFormControlFrame,
public nsIListControlFrame,
public nsISelectControlFrame
{
public:
friend nsIFrame* NS_NewListControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
// nsISupports
NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
// nsIFrame
NS_IMETHOD HandleEvent(nsPresContext* aPresContext,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD SetInitialChildList(nsIAtom* aListName,
nsIFrame* aChildList);
// Our min width is our pref width
virtual nscoord GetMinWidth(nsIRenderingContext *aRenderingContext);
NS_IMETHOD Reflow(nsPresContext* aCX,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow);
NS_IMETHOD DidReflow(nsPresContext* aPresContext,
const nsHTMLReflowState* aReflowState,
nsDidReflowStatus aStatus);
virtual void Destroy();
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
virtual nsIFrame* GetContentInsertionFrame();
/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::scrollFrame
*/
virtual nsIAtom* GetType() const;
virtual PRBool IsFrameOfType(PRUint32 aFlags) const;
virtual PRBool IsContainingBlock() const;
virtual void InvalidateInternal(const nsRect& aDamageRect,
nscoord aX, nscoord aY, nsIFrame* aForChild,
PRBool aImmediate);
#ifdef DEBUG
// nsIFrameDebug
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
// nsIFormControlFrame
virtual nsresult SetFormProperty(nsIAtom* aName, const nsAString& aValue);
virtual nsresult GetFormProperty(nsIAtom* aName, nsAString& aValue) const;
virtual void SetFocus(PRBool aOn = PR_TRUE, PRBool aRepaint = PR_FALSE);
virtual nsGfxScrollFrameInner::ScrollbarStyles GetScrollbarStyles() const;
// for accessibility purposes
#ifdef ACCESSIBILITY
NS_IMETHOD GetAccessible(nsIAccessible** aAccessible);
#endif
// nsHTMLContainerFrame
virtual PRIntn GetSkipSides() const;
// nsIListControlFrame
virtual void SetComboboxFrame(nsIFrame* aComboboxFrame);
virtual PRInt32 GetSelectedIndex();
virtual void GetOptionText(PRInt32 aIndex, nsAString & aStr);
virtual void CaptureMouseEvents(PRBool aGrabMouseEvents);
virtual nscoord GetHeightOfARow();
virtual PRInt32 GetNumberOfOptions();
virtual void SyncViewWithFrame();
virtual void AboutToDropDown();
virtual void AboutToRollup();
virtual void FireOnChange();
virtual void ComboboxFinish(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);
// mouse event listeners
nsresult MouseDown(nsIDOMEvent* aMouseEvent);
nsresult MouseUp(nsIDOMEvent* aMouseEvent);
// mouse motion listeners
nsresult MouseMove(nsIDOMEvent* aMouseEvent);
nsresult DragMove(nsIDOMEvent* aMouseEvent);
// key listeners
nsresult KeyPress(nsIDOMEvent* aKeyEvent);
// Static Methods
static already_AddRefed<nsIDOMHTMLOptionsCollection>
GetOptions(nsIContent * aContent);
static already_AddRefed<nsIDOMHTMLOptionElement>
GetOption(nsIDOMHTMLOptionsCollection* aOptions, PRInt32 aIndex);
static already_AddRefed<nsIContent>
GetOptionAsContent(nsIDOMHTMLOptionsCollection* aCollection,PRInt32 aIndex);
static void ComboboxFocusSet();
// Helper
PRBool IsFocused() { return this == mFocused; }
/**
* Function to paint the focus rect when our nsSelectsAreaFrame is painting.
* @param aPt the offset of this frame, relative to the rendering reference
* frame
*/
void PaintFocus(nsIRenderingContext& aRC, nsPoint aPt);
/**
* Function to calculate the height a row, for use with the "size" attribute.
* Can't be const because GetNumberOfOptions() isn't const.
*/
nscoord CalcHeightOfARow();
/**
* Function to ask whether we're currently in what might be the
* first pass of a two-pass reflow.
*/
PRBool MightNeedSecondPass() const {
return mMightNeedSecondPass;
}
void SetSuppressScrollbarUpdate(PRBool aSuppress) {
nsHTMLScrollFrame::SetSuppressScrollbarUpdate(aSuppress);
}
/**
* Return whether the list is in dropdown mode.
*/
PRBool IsInDropDownMode() const;
#ifdef ACCESSIBILITY
void FireMenuItemActiveEvent(); // Inform assistive tech what got focused
#endif
protected:
// Returns PR_FALSE if calling it destroyed |this|.
PRBool UpdateSelection();
PRBool GetMultiple(nsIDOMHTMLSelectElement* aSelect = nsnull) const;
void DropDownToggleKey(nsIDOMEvent* aKeyEvent);
nsresult IsOptionDisabled(PRInt32 anIndex, PRBool &aIsDisabled);
nsresult ScrollToFrame(nsIContent * aOptElement);
nsresult ScrollToIndex(PRInt32 anIndex);
PRBool IgnoreMouseEventForSelection(nsIDOMEvent* aEvent);
void UpdateInListState(nsIDOMEvent* aEvent);
void AdjustIndexForDisabledOpt(PRInt32 aStartIndex, PRInt32 &anNewIndex,
PRInt32 aNumOptions, PRInt32 aDoAdjustInc, PRInt32 aDoAdjustIncNext);
virtual void ResetList(PRBool aAllowScrolling);
nsListControlFrame(nsIPresShell* aShell, nsIDocument* aDocument, nsStyleContext* aContext);
virtual ~nsListControlFrame();
// Utility methods
nsresult GetSizeAttribute(PRInt32 *aSize);
nsIContent* GetOptionFromContent(nsIContent *aContent);
nsresult GetIndexFromDOMEvent(nsIDOMEvent* aMouseEvent, PRInt32& aCurIndex);
already_AddRefed<nsIContent> GetOptionContent(PRInt32 aIndex) const;
PRBool IsContentSelected(nsIContent* aContent) const;
PRBool IsContentSelectedByIndex(PRInt32 aIndex) const;
PRBool IsOptionElement(nsIContent* aContent);
PRBool CheckIfAllFramesHere();
PRInt32 GetIndexFromContent(nsIContent *aContent);
PRBool IsLeftButton(nsIDOMEvent* aMouseEvent);
// aNumOptions is the number of options we have; if we have none,
// we'll just guess at a row height based on our own style.
nscoord CalcFallbackRowHeight(PRInt32 aNumOptions);
// CalcIntrinsicHeight computes our intrinsic height (taking the "size"
// attribute into account). This should only be called in non-dropdown mode.
nscoord CalcIntrinsicHeight(nscoord aHeightOfARow, PRInt32 aNumberOfOptions);
// Dropped down stuff
void SetComboboxItem(PRInt32 aIndex);
/**
* Method to reflow ourselves as a dropdown list. This differs from
* reflow as a listbox because the criteria for needing a second
* pass are different. This will be called from Reflow() as needed.
*/
nsresult ReflowAsDropdown(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
// Selection
PRBool SetOptionsSelectedFromFrame(PRInt32 aStartIndex,
PRInt32 aEndIndex,
PRBool aValue,
PRBool aClearAll);
PRBool ToggleOptionSelectedFromFrame(PRInt32 aIndex);
PRBool SingleSelection(PRInt32 aClickedIndex, PRBool aDoToggle);
PRBool ExtendedSelection(PRInt32 aStartIndex, PRInt32 aEndIndex,
PRBool aClearAll);
PRBool PerformSelection(PRInt32 aClickedIndex, PRBool aIsShift,
PRBool aIsControl);
PRBool HandleListSelection(nsIDOMEvent * aDOMEvent, PRInt32 selectedIndex);
void InitSelectionRange(PRInt32 aClickedIndex);
nsSelectsAreaFrame* GetOptionsContainer() const {
return NS_STATIC_CAST(nsSelectsAreaFrame*, GetScrolledFrame());
}
nscoord HeightOfARow() {
return GetOptionsContainer()->HeightOfARow();
}
// Data Members
PRInt32 mStartSelectionIndex;
PRInt32 mEndSelectionIndex;
nsIComboboxControlFrame *mComboboxFrame;
PRInt32 mNumDisplayRows;
PRPackedBool mChangesSinceDragStart:1;
PRPackedBool mButtonDown:1;
// Has the user selected a visible item since we showed the
// dropdown?
PRPackedBool mItemSelectionStarted:1;
PRPackedBool mIsAllContentHere:1;
PRPackedBool mIsAllFramesHere:1;
PRPackedBool mHasBeenInitialized:1;
PRPackedBool mNeedToReset:1;
PRPackedBool mPostChildrenLoadedReset:1;
//bool value for multiple discontiguous selection
PRPackedBool mControlSelectMode:1;
// True if we're in the middle of a reflow and might need a second
// pass. This only happens for auto heights.
PRPackedBool mMightNeedSecondPass:1;
// The last computed height we reflowed at if we're a combobox dropdown.
// XXXbz should we be using a subclass here? Or just not worry
// about the extra member on listboxes?
nscoord mLastDropdownComputedHeight;
nsRefPtr<nsListEventListener> mEventListener;
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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