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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 nsXULTooltipListener_h__
#define nsXULTooltipListener_h__
#include "nsIDOMEventListener.h"
#include "nsIDOMMouseEvent.h"
#include "nsIDOMElement.h"
#include "nsITimer.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsITreeBoxObject.h"
#include "nsITreeColumns.h"
#include "nsWeakPtr.h"
#include "mozilla/Attributes.h"
class nsIContent;
class nsXULTooltipListener final : public nsIDOMEventListener
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIDOMEVENTLISTENER
void MouseOut(nsIDOMEvent* aEvent);
void MouseMove(nsIDOMEvent* aEvent);
nsresult AddTooltipSupport(nsIContent* aNode);
nsresult RemoveTooltipSupport(nsIContent* aNode);
static nsXULTooltipListener* GetInstance() {
if (!mInstance)
mInstance = new nsXULTooltipListener();
return mInstance;
}
static void ClearTooltipCache() { mInstance = nullptr; }
protected:
nsXULTooltipListener();
~nsXULTooltipListener();
// pref callback for when the "show tooltips" pref changes
static bool sShowTooltips;
static uint32_t sTooltipListenerCount;
void KillTooltipTimer();
void CheckTreeBodyMove(nsIDOMMouseEvent* aMouseEvent);
nsresult GetSourceTreeBoxObject(nsITreeBoxObject** aBoxObject);
nsresult ShowTooltip();
void LaunchTooltip();
nsresult HideTooltip();
nsresult DestroyTooltip();
// This method tries to find a tooltip for aTarget.
nsresult FindTooltip(nsIContent* aTarget, nsIContent** aTooltip);
// This method calls FindTooltip and checks that the tooltip
// can be really used (i.e. tooltip is not a menu).
nsresult GetTooltipFor(nsIContent* aTarget, nsIContent** aTooltip);
static nsXULTooltipListener* mInstance;
static void ToolbarTipsPrefChanged(const char *aPref, void *aClosure);
nsWeakPtr mSourceNode;
nsWeakPtr mTargetNode;
nsWeakPtr mCurrentTooltip;
// a timer for showing the tooltip
nsCOMPtr<nsITimer> mTooltipTimer;
static void sTooltipCallback (nsITimer* aTimer, void* aListener);
// screen coordinates of the last mousemove event, stored so that the
// tooltip can be opened at this location.
int32_t mMouseScreenX, mMouseScreenY;
// various constants for tooltips
enum {
kTooltipMouseMoveTolerance = 7 // 7 pixel tolerance for mousemove event
};
// flag specifying if the tooltip has already been displayed by a MouseMove
// event. The flag is reset on MouseOut so that the tooltip will display
// the next time the mouse enters the node (bug #395668).
bool mTooltipShownOnce;
// Special members for handling XUL trees.
bool mIsSourceTree;
bool mNeedTitletip;
int32_t mLastTreeRow;
nsCOMPtr<nsITreeColumn> mLastTreeCol;
};
#endif // nsXULTooltipListener
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