gecko-dev/layout/forms/nsComboboxControlFrame.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#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 "nsBlockFrame.h"
#include "nsIFormControlFrame.h"
#include "nsIComboboxControlFrame.h"
#include "nsIAnonymousContentCreator.h"
#include "nsISelectControlFrame.h"
#include "nsIRollupListener.h"
#include "nsPresState.h"
#include "nsCSSFrameConstructor.h"
#include "nsIStatefulFrame.h"
#include "nsIScrollableFrame.h"
#include "nsIDOMEventListener.h"
#include "nsThreadUtils.h"
class nsIView;
class nsStyleContext;
class nsIListControlFrame;
class nsComboboxDisplayFrame;
class nsComboboxControlFrame : public nsBlockFrame,
public nsIFormControlFrame,
public nsIComboboxControlFrame,
public nsIAnonymousContentCreator,
public nsISelectControlFrame,
public nsIRollupListener,
public nsIStatefulFrame
{
public:
friend nsIFrame* NS_NewComboboxControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, PRUint32 aFlags);
friend class nsComboboxDisplayFrame;
nsComboboxControlFrame(nsStyleContext* aContext);
~nsComboboxControlFrame();
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS
// nsIAnonymousContentCreator
virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements);
virtual void AppendAnonymousContentTo(nsBaseContentList& aElements,
PRUint32 aFilter);
virtual nsIFrame* CreateFrameFor(nsIContent* aContent);
#ifdef ACCESSIBILITY
virtual already_AddRefed<Accessible> CreateAccessible();
#endif
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
virtual nscoord GetPrefWidth(nsRenderingContext *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(nsRenderingContext& 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 bool IsFrameOfType(PRUint32 aFlags) const
{
return nsBlockFrame::IsFrameOfType(aFlags &
~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
}
virtual nsIScrollableFrame* GetScrollTargetFrame() {
return do_QueryFrame(mDropdownFrame);
}
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
virtual void DestroyFrom(nsIFrame* aDestructRoot);
NS_IMETHOD SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList);
virtual const nsFrameList& GetChildList(ChildListID aListID) const;
virtual void GetChildLists(nsTArray<ChildList>* aLists) const;
virtual nsIFrame* GetContentInsertionFrame();
// nsIFormControlFrame
virtual nsresult SetFormProperty(nsIAtom* aName, const nsAString& aValue);
virtual nsresult GetFormProperty(nsIAtom* aName, nsAString& aValue) const;
/**
* Inform the control that it got (or lost) focus.
* If it lost focus, the dropdown menu will be rolled up if needed,
* and FireOnChange() will be called.
* @param aOn true if got focus, false if lost focus.
* @param aRepaint if true then force repaint (NOTE: we always force repaint currently)
* @note This method might destroy |this|.
*/
virtual void SetFocus(bool aOn, bool aRepaint);
//nsIComboboxControlFrame
virtual bool IsDroppedDown() { return mDroppedDown; }
/**
* @note This method might destroy |this|.
*/
virtual void ShowDropDown(bool aDoDropDown);
virtual nsIFrame* GetDropDown();
virtual void SetDropDown(nsIFrame* aDropDownFrame);
/**
* @note This method might destroy |this|.
*/
virtual void RollupFromList();
/**
* Return the available space above and below this frame for
* placing the drop-down list, and the current 2D translation.
* Note that either or both can be less than or equal to zero,
* if both are then the drop-down should be closed.
*/
void GetAvailableDropdownSpace(nscoord* aAbove,
nscoord* aBelow,
nsPoint* aTranslation);
virtual PRInt32 GetIndexOfDisplayArea();
/**
* @note This method might destroy |this|.
*/
NS_IMETHOD RedisplaySelectedText();
virtual PRInt32 UpdateRecentIndex(PRInt32 aIndex);
virtual void OnContentReset();
// nsISelectControlFrame
NS_IMETHOD AddOption(PRInt32 index);
NS_IMETHOD RemoveOption(PRInt32 index);
NS_IMETHOD DoneAddingChildren(bool aIsDone);
NS_IMETHOD OnOptionSelected(PRInt32 aIndex, bool aSelected);
NS_IMETHOD OnSetSelectedIndex(PRInt32 aOldIndex, PRInt32 aNewIndex);
//nsIRollupListener
/**
* Hide the dropdown menu and stop capturing mouse events.
* @note This method might destroy |this|.
*/
virtual nsIContent* Rollup(PRUint32 aCount, bool aGetLastRolledUp = false);
virtual void NotifyGeometryChange();
/**
* A combobox should roll up if a mousewheel event happens outside of
* the popup area.
*/
virtual bool ShouldRollupOnMouseWheelEvent()
{ return true; }
/**
* A combobox should not roll up if activated by a mouse activate message
* (eg. X-mouse).
*/
virtual bool ShouldRollupOnMouseActivate()
{ return false; }
virtual PRUint32 GetSubmenuWidgetChain(nsTArray<nsIWidget*> *aWidgetChain)
{ return 0; }
//nsIStatefulFrame
NS_IMETHOD SaveState(SpecialStateID aStateID, nsPresState** aState);
NS_IMETHOD RestoreState(nsPresState* aState);
static bool ToolkitHasNativePopup();
protected:
friend class RedisplayTextEvent;
friend class nsAsyncResize;
friend class nsResizeDropdownAtFinalPosition;
// Utilities
nsresult ReflowDropdown(nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState);
enum DropDownPositionState {
// can't show the dropdown at its current position
eDropDownPositionSuppressed,
// a resize reflow is pending, don't show it yet
eDropDownPositionPendingResize,
// the dropdown has its final size and position and can be displayed here
eDropDownPositionFinal
};
DropDownPositionState AbsolutelyPositionDropDown();
// Helper for GetMinWidth/GetPrefWidth
nscoord GetIntrinsicWidth(nsRenderingContext* aRenderingContext,
nsLayoutUtils::IntrinsicWidthType aType);
class RedisplayTextEvent : public nsRunnable {
public:
NS_DECL_NSIRUNNABLE
RedisplayTextEvent(nsComboboxControlFrame *c) : mControlFrame(c) {}
void Revoke() { mControlFrame = nsnull; }
private:
nsComboboxControlFrame *mControlFrame;
};
/**
* Show or hide the dropdown list.
* @note This method might destroy |this|.
*/
void ShowPopup(bool aShowPopup);
/**
* Show or hide the dropdown list.
* @param aShowList true to show, false to hide the dropdown.
* @note This method might destroy |this|.
* @return false if this frame is destroyed, true if still alive.
*/
bool ShowList(bool aShowList);
void CheckFireOnChange();
void FireValueChangeEvent();
nsresult RedisplayText(PRInt32 aIndex);
void HandleRedisplayTextEvent();
void ActuallyDisplayText(bool aNotify);
private:
// If our total transform to the root frame of the root document is only a 2d
// translation then return that translation, otherwise returns (0,0).
nsPoint GetCSSTransformTranslation();
protected:
nsFrameList mPopupFrames; // additional named child list
nsCOMPtr<nsIContent> mDisplayContent; // Anonymous content used to display the current selection
nsCOMPtr<nsIContent> mButtonContent; // Anonymous content for the button
nsIFrame* mDisplayFrame; // frame to display selection
nsIFrame* mButtonFrame; // button frame
nsIFrame* mDropdownFrame; // dropdown list 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;
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<nsIDOMEventListener> mButtonListener;
// Current state of the dropdown list, true is dropped down.
bool mDroppedDown;
// See comment in HandleRedisplayTextEvent().
bool mInRedisplayText;
// Acting on ShowDropDown(true) is delayed until we're focused.
bool mDelayedShowDropDown;
// static class data member for Bug 32920
// only one control can be focused at a time
static nsComboboxControlFrame* sFocused;
#ifdef DO_REFLOW_COUNTER
PRInt32 mReflowId;
#endif
};
#endif