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gecko/layout/xul/nsXULPopupManager.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/. */
/**
* The XUL Popup Manager keeps track of all open popups.
*/
#ifndef nsXULPopupManager_h__
#define nsXULPopupManager_h__
#include "mozilla/Logging.h"
#include "nsIContent.h"
#include "nsIRollupListener.h"
#include "nsIDOMEventListener.h"
#include "nsPoint.h"
#include "nsCOMPtr.h"
#include "nsTArray.h"
#include "nsIObserver.h"
#include "nsITimer.h"
#include "nsIReflowCallback.h"
#include "nsThreadUtils.h"
#include "nsStyleConsts.h"
#include "nsWidgetInitData.h"
#include "mozilla/Attributes.h"
#include "Units.h"
// X.h defines KeyPress
#ifdef KeyPress
#undef KeyPress
#endif
/**
* There are two types that are used:
* - dismissable popups such as menus, which should close up when there is a
* click outside the popup. In this situation, the entire chain of menus
* above should also be closed.
* - panels, which stay open until a request is made to close them. This
* type is used by tooltips.
*
* When a new popup is opened, it is appended to the popup chain, stored in a
* linked list in mPopups for dismissable menus and panels or mNoHidePanels
* for tooltips and panels with noautohide="true".
* Popups are stored in this list linked from newest to oldest. When a click
* occurs outside one of the open dismissable popups, the chain is closed by
* calling Rollup.
*/
class nsContainerFrame;
class nsMenuFrame;
class nsMenuPopupFrame;
class nsMenuBarFrame;
class nsMenuParent;
class nsIDOMKeyEvent;
class nsIDocShellTreeItem;
class nsPIDOMWindow;
// when a menu command is executed, the closemenu attribute may be used
// to define how the menu should be closed up
enum CloseMenuMode {
CloseMenuMode_Auto, // close up the chain of menus, default value
CloseMenuMode_None, // don't close up any menus
CloseMenuMode_Single // close up only the menu the command is inside
};
/**
* nsNavigationDirection: an enum expressing navigation through the menus in
* terms which are independent of the directionality of the chrome. The
* terminology, derived from XSL-FO and CSS3 (e.g.
* http://www.w3.org/TR/css3-text/#TextLayout), is BASE (Before, After, Start,
* End), with the addition of First and Last (mapped to Home and End
* respectively).
*
* In languages such as English where the inline progression is left-to-right
* and the block progression is top-to-bottom (lr-tb), these terms will map out
* as in the following diagram
*
* --- inline progression --->
*
* First |
* ... |
* Before |
* +--------+ block
* Start | | End progression
* +--------+ |
* After |
* ... |
* Last V
*
*/
enum nsNavigationDirection {
eNavigationDirection_Last,
eNavigationDirection_First,
eNavigationDirection_Start,
eNavigationDirection_Before,
eNavigationDirection_End,
eNavigationDirection_After
};
#define NS_DIRECTION_IS_INLINE(dir) (dir == eNavigationDirection_Start || \
dir == eNavigationDirection_End)
#define NS_DIRECTION_IS_BLOCK(dir) (dir == eNavigationDirection_Before || \
dir == eNavigationDirection_After)
#define NS_DIRECTION_IS_BLOCK_TO_EDGE(dir) (dir == eNavigationDirection_First || \
dir == eNavigationDirection_Last)
PR_STATIC_ASSERT(NS_STYLE_DIRECTION_LTR == 0 && NS_STYLE_DIRECTION_RTL == 1);
/**
* DirectionFromKeyCodeTable: two arrays, the first for left-to-right and the
* other for right-to-left, that map keycodes to values of
* nsNavigationDirection.
*/
extern const nsNavigationDirection DirectionFromKeyCodeTable[2][6];
#define NS_DIRECTION_FROM_KEY_CODE(frame, keycode) \
(DirectionFromKeyCodeTable[frame->StyleVisibility()->mDirection] \
[keycode - nsIDOMKeyEvent::DOM_VK_END])
// nsMenuChainItem holds info about an open popup. Items are stored in a
// doubly linked list. Note that the linked list is stored beginning from
// the lowest child in a chain of menus, as this is the active submenu.
class nsMenuChainItem
{
private:
nsMenuPopupFrame* mFrame; // the popup frame
nsPopupType mPopupType; // the popup type of the frame
bool mIsContext; // true for context menus
bool mOnMenuBar; // true if the menu is on a menu bar
bool mIgnoreKeys; // true if keyboard listeners should not be used
nsMenuChainItem* mParent;
nsMenuChainItem* mChild;
public:
nsMenuChainItem(nsMenuPopupFrame* aFrame, bool aIsContext, nsPopupType aPopupType)
: mFrame(aFrame),
mPopupType(aPopupType),
mIsContext(aIsContext),
mOnMenuBar(false),
mIgnoreKeys(false),
mParent(nullptr),
mChild(nullptr)
{
NS_ASSERTION(aFrame, "null frame passed to nsMenuChainItem constructor");
MOZ_COUNT_CTOR(nsMenuChainItem);
}
~nsMenuChainItem()
{
MOZ_COUNT_DTOR(nsMenuChainItem);
}
nsIContent* Content();
nsMenuPopupFrame* Frame() { return mFrame; }
nsPopupType PopupType() { return mPopupType; }
bool IsMenu() { return mPopupType == ePopupTypeMenu; }
bool IsContextMenu() { return mIsContext; }
bool IgnoreKeys() { return mIgnoreKeys; }
bool IsOnMenuBar() { return mOnMenuBar; }
void SetIgnoreKeys(bool aIgnoreKeys) { mIgnoreKeys = aIgnoreKeys; }
void SetOnMenuBar(bool aOnMenuBar) { mOnMenuBar = aOnMenuBar; }
nsMenuChainItem* GetParent() { return mParent; }
nsMenuChainItem* GetChild() { return mChild; }
// set the parent of this item to aParent, also changing the parent
// to have this as a child.
void SetParent(nsMenuChainItem* aParent);
// removes an item from the chain. The root pointer must be supplied in case
// the item is the first item in the chain in which case the pointer will be
// set to the next item, or null if there isn't another item. After detaching,
// this item will not have a parent or a child.
void Detach(nsMenuChainItem** aRoot);
};
// this class is used for dispatching popupshowing events asynchronously.
class nsXULPopupShowingEvent : public nsRunnable
{
public:
nsXULPopupShowingEvent(nsIContent *aPopup,
bool aIsContextMenu,
bool aSelectFirstItem)
: mPopup(aPopup),
mIsContextMenu(aIsContextMenu),
mSelectFirstItem(aSelectFirstItem)
{
NS_ASSERTION(aPopup, "null popup supplied to nsXULPopupShowingEvent constructor");
}
NS_IMETHOD Run() override;
private:
nsCOMPtr<nsIContent> mPopup;
bool mIsContextMenu;
bool mSelectFirstItem;
};
// this class is used for dispatching popuphiding events asynchronously.
class nsXULPopupHidingEvent : public nsRunnable
{
public:
nsXULPopupHidingEvent(nsIContent *aPopup,
nsIContent* aNextPopup,
nsIContent* aLastPopup,
nsPopupType aPopupType,
bool aDeselectMenu,
bool aIsCancel)
: mPopup(aPopup),
mNextPopup(aNextPopup),
mLastPopup(aLastPopup),
mPopupType(aPopupType),
mDeselectMenu(aDeselectMenu),
mIsRollup(aIsCancel)
{
NS_ASSERTION(aPopup, "null popup supplied to nsXULPopupHidingEvent constructor");
// aNextPopup and aLastPopup may be null
}
NS_IMETHOD Run() override;
private:
nsCOMPtr<nsIContent> mPopup;
nsCOMPtr<nsIContent> mNextPopup;
nsCOMPtr<nsIContent> mLastPopup;
nsPopupType mPopupType;
bool mDeselectMenu;
bool mIsRollup;
};
// this class is used for dispatching menu command events asynchronously.
class nsXULMenuCommandEvent : public nsRunnable
{
public:
nsXULMenuCommandEvent(nsIContent *aMenu,
bool aIsTrusted,
bool aShift,
bool aControl,
bool aAlt,
bool aMeta,
bool aUserInput,
bool aFlipChecked)
: mMenu(aMenu),
mIsTrusted(aIsTrusted),
mShift(aShift),
mControl(aControl),
mAlt(aAlt),
mMeta(aMeta),
mUserInput(aUserInput),
mFlipChecked(aFlipChecked),
mCloseMenuMode(CloseMenuMode_Auto)
{
NS_ASSERTION(aMenu, "null menu supplied to nsXULMenuCommandEvent constructor");
}
NS_IMETHOD Run() override;
void SetCloseMenuMode(CloseMenuMode aCloseMenuMode) { mCloseMenuMode = aCloseMenuMode; }
private:
nsCOMPtr<nsIContent> mMenu;
bool mIsTrusted;
bool mShift;
bool mControl;
bool mAlt;
bool mMeta;
bool mUserInput;
bool mFlipChecked;
CloseMenuMode mCloseMenuMode;
};
class nsXULPopupManager final : public nsIDOMEventListener,
public nsIRollupListener,
public nsITimerCallback,
public nsIObserver
{
public:
friend class nsXULPopupShowingEvent;
friend class nsXULPopupHidingEvent;
friend class nsXULMenuCommandEvent;
friend class TransitionEnder;
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
NS_DECL_NSITIMERCALLBACK
NS_DECL_NSIDOMEVENTLISTENER
// nsIRollupListener
virtual bool Rollup(uint32_t aCount, bool aFlush,
const nsIntPoint* pos, nsIContent** aLastRolledUp) override;
virtual bool ShouldRollupOnMouseWheelEvent() override;
virtual bool ShouldConsumeOnMouseWheelEvent() override;
virtual bool ShouldRollupOnMouseActivate() override;
virtual uint32_t GetSubmenuWidgetChain(nsTArray<nsIWidget*> *aWidgetChain) override;
virtual void NotifyGeometryChange() override {}
virtual nsIWidget* GetRollupWidget() override;
static nsXULPopupManager* sInstance;
// initialize and shutdown methods called by nsLayoutStatics
static nsresult Init();
static void Shutdown();
// returns a weak reference to the popup manager instance, could return null
// if a popup manager could not be allocated
static nsXULPopupManager* GetInstance();
// This should be called when a window is moved or resized to adjust the
// popups accordingly.
void AdjustPopupsOnWindowChange(nsPIDOMWindow* aWindow);
void AdjustPopupsOnWindowChange(nsIPresShell* aPresShell);
// given a menu frame, find the prevous or next menu frame. If aPopup is
// true then navigate a menupopup, from one item on the menu to the previous
// or next one. This is used for cursor navigation between items in a popup
// menu. If aIsPopup is false, the navigation is on a menubar, so navigate
// between menus on the menubar. This is used for left/right cursor navigation.
//
// Items that are not valid, such as non-menu or non-menuitem elements are
// skipped, and the next or previous item after that is checked.
//
// If aStart is null, the first valid item is retrieved by GetNextMenuItem
// and the last valid item is retrieved by GetPreviousMenuItem.
//
// Both methods will loop around the beginning or end if needed.
//
// aParent - the parent menubar or menupopup
// aStart - the menu/menuitem to start navigation from. GetPreviousMenuItem
// returns the item before it, while GetNextMenuItem returns the
// item after it.
// aIsPopup - true for menupopups, false for menubars
static nsMenuFrame* GetPreviousMenuItem(nsContainerFrame* aParent,
nsMenuFrame* aStart,
bool aIsPopup);
static nsMenuFrame* GetNextMenuItem(nsContainerFrame* aParent,
nsMenuFrame* aStart,
bool aIsPopup);
// returns true if the menu item aContent is a valid menuitem which may
// be navigated to. aIsPopup should be true for items on a popup, or false
// for items on a menubar.
static bool IsValidMenuItem(nsPresContext* aPresContext,
nsIContent* aContent,
bool aOnPopup);
// inform the popup manager that a menu bar has been activated or deactivated,
// either because one of its menus has opened or closed, or that the menubar
// has been focused such that its menus may be navigated with the keyboard.
// aActivate should be true when the menubar should be focused, and false
// when the active menu bar should be defocused. In the latter case, if
// aMenuBar isn't currently active, yet another menu bar is, that menu bar
// will remain active.
void SetActiveMenuBar(nsMenuBarFrame* aMenuBar, bool aActivate);
// retrieve the node and offset of the last mouse event used to open a
// context menu. This information is determined from the rangeParent and
// the rangeOffset of the event supplied to ShowPopup or ShowPopupAtScreen.
// This is used by the implementation of nsIDOMXULDocument::GetPopupRangeParent
// and nsIDOMXULDocument::GetPopupRangeOffset.
void GetMouseLocation(nsIDOMNode** aNode, int32_t* aOffset);
/**
* Open a <menu> given its content node. If aSelectFirstItem is
* set to true, the first item on the menu will automatically be
* selected. If aAsynchronous is true, the event will be dispatched
* asynchronously. This should be true when called from frame code.
*/
void ShowMenu(nsIContent *aMenu, bool aSelectFirstItem, bool aAsynchronous);
/**
* Open a popup, either anchored or unanchored. If aSelectFirstItem is
* true, then the first item in the menu is selected. The arguments are
* similar to those for nsIPopupBoxObject::OpenPopup.
*
* aTriggerEvent should be the event that triggered the event. This is used
* to determine the coordinates and trigger node for the popup. This may be
* null if the popup was not triggered by an event.
*
* This fires the popupshowing event synchronously.
*/
void ShowPopup(nsIContent* aPopup,
nsIContent* aAnchorContent,
const nsAString& aPosition,
int32_t aXPos, int32_t aYPos,
bool aIsContextMenu,
bool aAttributesOverride,
bool aSelectFirstItem,
nsIDOMEvent* aTriggerEvent);
/**
* Open a popup at a specific screen position specified by aXPos and aYPos,
* measured in CSS pixels.
*
* This fires the popupshowing event synchronously.
*
* If aIsContextMenu is true, the popup is positioned at a slight
* offset from aXPos/aYPos to ensure that it is not under the mouse
* cursor.
*/
void ShowPopupAtScreen(nsIContent* aPopup,
int32_t aXPos, int32_t aYPos,
bool aIsContextMenu,
nsIDOMEvent* aTriggerEvent);
/* Open a popup anchored at a screen rectangle specified by aRect.
* The remaining arguments are similar to ShowPopup.
*/
void ShowPopupAtScreenRect(nsIContent* aPopup,
const nsAString& aPosition,
const nsIntRect& aRect,
bool aIsContextMenu,
bool aAttributesOverride,
nsIDOMEvent* aTriggerEvent);
/**
* Open a tooltip at a specific screen position specified by aXPos and aYPos,
* measured in CSS pixels.
*
* This fires the popupshowing event synchronously.
*/
void ShowTooltipAtScreen(nsIContent* aPopup,
nsIContent* aTriggerContent,
int32_t aXPos, int32_t aYPos);
/**
* This method is provided only for compatibility with an older popup API.
* New code should not call this function and should call ShowPopup instead.
*
* This fires the popupshowing event synchronously.
*/
void ShowPopupWithAnchorAlign(nsIContent* aPopup,
nsIContent* aAnchorContent,
nsAString& aAnchor,
nsAString& aAlign,
int32_t aXPos, int32_t aYPos,
bool aIsContextMenu);
/*
* Hide a popup aPopup. If the popup is in a <menu>, then also inform the
* menu that the popup is being hidden.
*
* aHideChain - true if the entire chain of menus should be closed. If false,
* only this popup is closed.
* aDeselectMenu - true if the parent <menu> of the popup should be deselected.
* This will be false when the menu is closed by pressing the
* Escape key.
* aAsynchronous - true if the first popuphiding event should be sent
* asynchrously. This should be true if HidePopup is called
* from a frame.
* aIsCancel - true if this popup is hiding due to being cancelled.
* aLastPopup - optional popup to close last when hiding a chain of menus.
* If null, then all popups will be closed.
*/
void HidePopup(nsIContent* aPopup,
bool aHideChain,
bool aDeselectMenu,
bool aAsynchronous,
bool aIsCancel,
nsIContent* aLastPopup = nullptr);
/**
* Hide the popup aFrame. This method is called by the view manager when the
* close button is pressed.
*/
void HidePopup(nsIFrame* aFrame);
/**
* Hide a popup after a short delay. This is used when rolling over menu items.
* This timer is stored in mCloseTimer. The timer may be cancelled and the popup
* closed by calling KillMenuTimer.
*/
void HidePopupAfterDelay(nsMenuPopupFrame* aPopup);
/**
* Hide all of the popups from a given docshell. This should be called when the
* document is hidden.
*/
void HidePopupsInDocShell(nsIDocShellTreeItem* aDocShellToHide);
/**
* Execute a menu command from the triggering event aEvent.
*
* aMenu - a menuitem to execute
* aEvent - an nsXULMenuCommandEvent that contains all the info from the mouse
* event which triggered the menu to be executed, may not be null
*/
void ExecuteMenu(nsIContent* aMenu, nsXULMenuCommandEvent* aEvent);
/**
* Return true if the popup for the supplied content node is open.
*/
bool IsPopupOpen(nsIContent* aPopup);
/**
* Return true if the popup for the supplied menu parent is open.
*/
bool IsPopupOpenForMenuParent(nsMenuParent* aMenuParent);
/**
* Return the frame for the topmost open popup of a given type, or null if
* no popup of that type is open. If aType is ePopupTypeAny, a menu of any
* type is returned, except for popups in the mNoHidePanels list.
*/
nsIFrame* GetTopPopup(nsPopupType aType);
/**
* Return an array of all the open and visible popup frames for
* menus, in order from top to bottom.
*/
void GetVisiblePopups(nsTArray<nsIFrame *>& aPopups);
/**
* Get the node that last triggered a popup or tooltip in the document
* aDocument. aDocument must be non-null and be a document contained within
* the same window hierarchy as the popup to retrieve.
*/
already_AddRefed<nsIDOMNode> GetLastTriggerPopupNode(nsIDocument* aDocument)
{
return GetLastTriggerNode(aDocument, false);
}
already_AddRefed<nsIDOMNode> GetLastTriggerTooltipNode(nsIDocument* aDocument)
{
return GetLastTriggerNode(aDocument, true);
}
/**
* Return false if a popup may not be opened. This will return false if the
* popup is already open, if the popup is in a content shell that is not
* focused, or if it is a submenu of another menu that isn't open.
*/
bool MayShowPopup(nsMenuPopupFrame* aFrame);
/**
* Indicate that the popup associated with aView has been moved to the
* specified screen coordiates.
*/
void PopupMoved(nsIFrame* aFrame, nsIntPoint aPoint);
/**
* Indicate that the popup associated with aView has been resized to the
* given device pixel size aSize.
*/
void PopupResized(nsIFrame* aFrame, mozilla::LayoutDeviceIntSize aSize);
/**
* Called when a popup frame is destroyed. In this case, just remove the
* item and later popups from the list. No point going through HidePopup as
* the frames have gone away.
*/
void PopupDestroyed(nsMenuPopupFrame* aFrame);
/**
* Returns true if there is a context menu open. If aPopup is specified,
* then the context menu must be later in the chain than aPopup. If aPopup
* is null, returns true if any context menu at all is open.
*/
bool HasContextMenu(nsMenuPopupFrame* aPopup);
/**
* Update the commands for the menus within the menu popup for a given
* content node. aPopup should be a XUL menupopup element. This method
* changes attributes on the children of aPopup, and deals only with the
* content of the popup, not the frames.
*/
void UpdateMenuItems(nsIContent* aPopup);
/**
* Stop the timer which hides a popup after a delay, started by a previous
* call to HidePopupAfterDelay. In addition, the popup awaiting to be hidden
* is closed asynchronously.
*/
void KillMenuTimer();
/**
* Cancel the timer which closes menus after delay, but only if the menu to
* close is aMenuParent. When a submenu is opened, the user might move the
* mouse over a sibling menuitem which would normally close the menu. This
* menu is closed via a timer. However, if the user moves the mouse over the
* submenu before the timer fires, we should instead cancel the timer. This
* ensures that the user can move the mouse diagonally over a menu.
*/
void CancelMenuTimer(nsMenuParent* aMenuParent);
/**
* Handles navigation for menu accelkeys. Returns true if the key has
* been handled. If aFrame is specified, then the key is handled by that
* popup, otherwise if aFrame is null, the key is handled by the active
* popup or menubar.
*/
bool HandleShortcutNavigation(nsIDOMKeyEvent* aKeyEvent,
nsMenuPopupFrame* aFrame);
/**
* Handles cursor navigation within a menu. Returns true if the key has
* been handled.
*/
bool HandleKeyboardNavigation(uint32_t aKeyCode);
/**
* Handle keyboard navigation within a menu popup specified by aFrame.
* Returns true if the key was handled and other default handling
* should not occur.
*/
bool HandleKeyboardNavigationInPopup(nsMenuPopupFrame* aFrame,
nsNavigationDirection aDir)
{
return HandleKeyboardNavigationInPopup(nullptr, aFrame, aDir);
}
/**
* Handles the keyboard event with keyCode value. Returns true if the event
* has been handled.
*/
bool HandleKeyboardEventWithKeyCode(nsIDOMKeyEvent* aKeyEvent,
nsMenuChainItem* aTopVisibleMenuItem);
nsresult KeyUp(nsIDOMKeyEvent* aKeyEvent);
nsresult KeyDown(nsIDOMKeyEvent* aKeyEvent);
nsresult KeyPress(nsIDOMKeyEvent* aKeyEvent);
protected:
nsXULPopupManager();
~nsXULPopupManager();
// get the nsMenuPopupFrame, if any, for the given content node
nsMenuPopupFrame* GetPopupFrameForContent(nsIContent* aContent, bool aShouldFlush);
// return the topmost menu, skipping over invisible popups
nsMenuChainItem* GetTopVisibleMenu();
// Hide all of the visible popups from the given list. aDeselectMenu
// indicates whether to deselect the menu of popups when hiding; this
// flag is passed as the first argument to HidePopup. This function
// can cause style changes and frame destruction.
void HidePopupsInList(const nsTArray<nsMenuPopupFrame *> &aFrames,
bool aDeselectMenu);
// set the event that was used to trigger the popup, or null to clear the
// event details. aTriggerContent will be set to the target of the event.
void InitTriggerEvent(nsIDOMEvent* aEvent, nsIContent* aPopup, nsIContent** aTriggerContent);
// callbacks for ShowPopup and HidePopup as events may be done asynchronously
void ShowPopupCallback(nsIContent* aPopup,
nsMenuPopupFrame* aPopupFrame,
bool aIsContextMenu,
bool aSelectFirstItem);
void HidePopupCallback(nsIContent* aPopup,
nsMenuPopupFrame* aPopupFrame,
nsIContent* aNextPopup,
nsIContent* aLastPopup,
nsPopupType aPopupType,
bool aDeselectMenu);
/**
* Fire a popupshowing event on the popup and then open the popup.
*
* aPopup - the popup to open
* aIsContextMenu - true for context menus
* aSelectFirstItem - true to select the first item in the menu
*/
void FirePopupShowingEvent(nsIContent* aPopup,
bool aIsContextMenu,
bool aSelectFirstItem);
/**
* Fire a popuphiding event and then hide the popup. This will be called
* recursively if aNextPopup and aLastPopup are set in order to hide a chain
* of open menus. If these are not set, only one popup is closed. However,
* if the popup type indicates a menu, yet the next popup is not a menu,
* then this ends the closing of popups. This allows a menulist inside a
* non-menu to close up the menu but not close up the panel it is contained
* within.
*
* The caller must keep a strong reference to aPopup, aNextPopup and aLastPopup.
*
* aPopup - the popup to hide
* aNextPopup - the next popup to hide
* aLastPopup - the last popup in the chain to hide
* aPresContext - nsPresContext for the popup's frame
* aPopupType - the PopupType of the frame.
* aDeselectMenu - true to unhighlight the menu when hiding it
* aIsCancel - true if this popup is hiding due to being cancelled.
*/
void FirePopupHidingEvent(nsIContent* aPopup,
nsIContent* aNextPopup,
nsIContent* aLastPopup,
nsPresContext *aPresContext,
nsPopupType aPopupType,
bool aDeselectMenu,
bool aIsCancel);
/**
* Handle keyboard navigation within a menu popup specified by aItem.
*/
bool HandleKeyboardNavigationInPopup(nsMenuChainItem* aItem,
nsNavigationDirection aDir)
{
return HandleKeyboardNavigationInPopup(aItem, aItem->Frame(), aDir);
}
private:
/**
* Handle keyboard navigation within a menu popup aFrame. If aItem is
* supplied, then it is expected to have a frame equal to aFrame.
* If aItem is non-null, then the navigation may be redirected to
* an open submenu if one exists. Returns true if the key was
* handled and other default handling should not occur.
*/
bool HandleKeyboardNavigationInPopup(nsMenuChainItem* aItem,
nsMenuPopupFrame* aFrame,
nsNavigationDirection aDir);
protected:
already_AddRefed<nsIDOMNode> GetLastTriggerNode(nsIDocument* aDocument, bool aIsTooltip);
/**
* Set mouse capturing for the current popup. This traps mouse clicks that
* occur outside the popup so that it can be closed up. aOldPopup should be
* set to the popup that was previously the current popup.
*/
void SetCaptureState(nsIContent *aOldPopup);
/**
* Key event listeners are attached to the document containing the current
* menu for menu and shortcut navigation. Only one listener is needed at a
* time, stored in mKeyListener, so switch it only if the document changes.
* Having menus in different documents is very rare, so the listeners will
* usually only be attached when the first menu opens and removed when all
* menus have closed.
*
* This is also used when only a menubar is active without any open menus,
* so that keyboard navigation between menus on the menubar may be done.
*/
void UpdateKeyboardListeners();
/*
* Returns true if the docshell for aDoc is aExpected or a child of aExpected.
*/
bool IsChildOfDocShell(nsIDocument* aDoc, nsIDocShellTreeItem* aExpected);
// the document the key event listener is attached to
nsCOMPtr<mozilla::dom::EventTarget> mKeyListener;
// widget that is currently listening to rollup events
nsCOMPtr<nsIWidget> mWidget;
// range parent and offset set in SetTriggerEvent
nsCOMPtr<nsIDOMNode> mRangeParent;
int32_t mRangeOffset;
// Device pixels relative to the showing popup's presshell's
// root prescontext's root frame.
mozilla::LayoutDeviceIntPoint mCachedMousePoint;
// cached modifiers
mozilla::Modifiers mCachedModifiers;
// set to the currently active menu bar, if any
nsMenuBarFrame* mActiveMenuBar;
// linked list of normal menus and panels.
nsMenuChainItem* mPopups;
// linked list of noautohide panels and tooltips.
nsMenuChainItem* mNoHidePanels;
// timer used for HidePopupAfterDelay
nsCOMPtr<nsITimer> mCloseTimer;
// a popup that is waiting on the timer
nsMenuPopupFrame* mTimerMenu;
// the popup that is currently being opened, stored only during the
// popupshowing event
nsCOMPtr<nsIContent> mOpeningPopup;
};
#endif
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