288 lines
9.5 KiB
C++
288 lines
9.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//
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// nsMenuFrame
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//
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#ifndef nsMenuFrame_h__
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#define nsMenuFrame_h__
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#include "nsIAtom.h"
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#include "nsCOMPtr.h"
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#include "nsBoxFrame.h"
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#include "nsFrameList.h"
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#include "nsGkAtoms.h"
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#include "nsMenuParent.h"
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#include "nsXULPopupManager.h"
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#include "nsITimer.h"
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#include "mozilla/Attributes.h"
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nsIFrame* NS_NewMenuFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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nsIFrame* NS_NewMenuItemFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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class nsIContent;
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#define NS_STATE_ACCELTEXT_IS_DERIVED NS_STATE_BOX_CHILD_RESERVED
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// the type of menuitem
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enum nsMenuType {
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// a normal menuitem where a command is carried out when activated
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eMenuType_Normal = 0,
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// a menuitem with a checkmark that toggles when activated
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eMenuType_Checkbox = 1,
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// a radio menuitem where only one of it and its siblings with the same
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// name attribute can be checked at a time
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eMenuType_Radio = 2
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};
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enum nsMenuListType {
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eNotMenuList, // not a menulist
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eReadonlyMenuList, // <menulist/>
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eEditableMenuList // <menulist editable="true"/>
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};
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class nsMenuFrame;
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/**
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* nsMenuTimerMediator is a wrapper around an nsMenuFrame which can be safely
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* passed to timers. The class is reference counted unlike the underlying
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* nsMenuFrame, so that it will exist as long as the timer holds a reference
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* to it. The callback is delegated to the contained nsMenuFrame as long as
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* the contained nsMenuFrame has not been destroyed.
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*/
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class nsMenuTimerMediator final : public nsITimerCallback
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{
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public:
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explicit nsMenuTimerMediator(nsMenuFrame* aFrame);
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NS_DECL_ISUPPORTS
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NS_DECL_NSITIMERCALLBACK
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void ClearFrame();
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private:
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~nsMenuTimerMediator();
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// Pointer to the wrapped frame.
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nsMenuFrame* mFrame;
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};
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class nsMenuFrame final : public nsBoxFrame
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{
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public:
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explicit nsMenuFrame(nsStyleContext* aContext);
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NS_DECL_QUERYFRAME_TARGET(nsMenuFrame)
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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NS_IMETHOD DoXULLayout(nsBoxLayoutState& aBoxLayoutState) override;
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virtual nsSize GetXULMinSize(nsBoxLayoutState& aBoxLayoutState) override;
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virtual nsSize GetXULPrefSize(nsBoxLayoutState& aBoxLayoutState) override;
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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#ifdef DEBUG_LAYOUT
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virtual nsresult SetXULDebug(nsBoxLayoutState& aState, bool aDebug) override;
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#endif
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// The following methods are all overridden so that the menupopup
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// can be stored in a separate list, so that it doesn't impact reflow of the
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// actual menu item at all.
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virtual const nsFrameList& GetChildList(ChildListID aList) const override;
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virtual void GetChildLists(nsTArray<ChildList>* aLists) const override;
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virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
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// Overridden to prevent events from going to children of the menu.
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virtual void BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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// this method can destroy the frame
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virtual nsresult HandleEvent(nsPresContext* aPresContext,
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mozilla::WidgetGUIEvent* aEvent,
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nsEventStatus* aEventStatus) override;
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virtual void SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList) override;
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virtual void AppendFrames(ChildListID aListID,
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nsFrameList& aFrameList) override;
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virtual void InsertFrames(ChildListID aListID,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList) override;
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virtual void RemoveFrame(ChildListID aListID,
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nsIFrame* aOldFrame) override;
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virtual nsIAtom* GetType() const override { return nsGkAtoms::menuFrame; }
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NS_IMETHOD SelectMenu(bool aActivateFlag);
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virtual nsIScrollableFrame* GetScrollTargetFrame() override;
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// Retrieve the element that the menu should be anchored to. By default this is
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// the menu itself. However, the anchor attribute may refer to the value of an
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// anonid within the menu's binding, or, if not found, the id of an element in
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// the document.
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nsIContent* GetAnchor();
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/**
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* NOTE: OpenMenu will open the menu asynchronously.
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*/
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void OpenMenu(bool aSelectFirstItem);
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// CloseMenu closes the menu asynchronously
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void CloseMenu(bool aDeselectMenu);
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bool IsChecked() { return mChecked; }
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NS_IMETHOD GetActiveChild(nsIDOMElement** aResult);
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NS_IMETHOD SetActiveChild(nsIDOMElement* aChild);
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// called when the Enter key is pressed while the menuitem is the current
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// one in its parent popup. This will carry out the command attached to
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// the menuitem. If the menu should be opened, this frame will be returned,
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// otherwise null will be returned.
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nsMenuFrame* Enter(mozilla::WidgetGUIEvent* aEvent);
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// Return the nearest menu bar or menupopup ancestor frame.
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nsMenuParent* GetMenuParent() const;
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const nsAString& GetRadioGroupName() { return mGroupName; }
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nsMenuType GetMenuType() { return mType; }
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nsMenuPopupFrame* GetPopup();
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/**
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* @return true if this frame has a popup child frame.
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*/
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bool HasPopup() const
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{
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return (GetStateBits() & NS_STATE_MENU_HAS_POPUP_LIST) != 0;
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}
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// nsMenuFrame methods
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bool IsOnMenuBar() const
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{
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nsMenuParent* menuParent = GetMenuParent();
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return menuParent && menuParent->IsMenuBar();
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}
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bool IsOnActiveMenuBar() const
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{
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nsMenuParent* menuParent = GetMenuParent();
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return menuParent && menuParent->IsMenuBar() && menuParent->IsActive();
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}
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virtual bool IsOpen();
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virtual bool IsMenu();
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nsMenuListType GetParentMenuListType();
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bool IsDisabled();
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void ToggleMenuState();
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// indiciate that the menu's popup has just been opened, so that the menu
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// can update its open state. This method modifies the open attribute on
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// the menu, so the frames could be gone after this call.
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void PopupOpened();
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// indiciate that the menu's popup has just been closed, so that the menu
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// can update its open state. The menu should be unhighlighted if
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// aDeselectedMenu is true. This method modifies the open attribute on
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// the menu, so the frames could be gone after this call.
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void PopupClosed(bool aDeselectMenu);
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// returns true if this is a menu on another menu popup. A menu is a submenu
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// if it has a parent popup or menupopup.
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bool IsOnMenu() const
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{
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nsMenuParent* menuParent = GetMenuParent();
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return menuParent && menuParent->IsMenu();
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}
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void SetIsMenu(bool aIsMenu) { mIsMenu = aIsMenu; }
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override
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{
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return MakeFrameName(NS_LITERAL_STRING("Menu"), aResult);
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}
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#endif
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static bool IsSizedToPopup(nsIContent* aContent, bool aRequireAlways);
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protected:
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friend class nsMenuTimerMediator;
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friend class nsASyncMenuInitialization;
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friend class nsMenuAttributeChangedEvent;
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/**
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* Initialize the popup list to the first popup frame within
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* aChildList. Removes the popup, if any, from aChildList.
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*/
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void SetPopupFrame(nsFrameList& aChildList);
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/**
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* Get the popup frame list from the frame property.
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* @return the property value if it exists, nullptr otherwise.
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*/
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nsFrameList* GetPopupList() const;
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/**
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* Destroy the popup list property. The list must exist and be empty.
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*/
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void DestroyPopupList();
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// Update the menu's type (normal, checkbox, radio).
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// This method can destroy the frame.
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void UpdateMenuType();
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// Update the checked state of the menu, and for radios, clear any other
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// checked items. This method can destroy the frame.
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void UpdateMenuSpecialState();
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// Examines the key node and builds the accelerator.
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void BuildAcceleratorText(bool aNotify);
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// Called to execute our command handler. This method can destroy the frame.
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void Execute(mozilla::WidgetGUIEvent *aEvent);
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// This method can destroy the frame
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virtual nsresult AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType) override;
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virtual ~nsMenuFrame() { }
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bool SizeToPopup(nsBoxLayoutState& aState, nsSize& aSize);
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bool ShouldBlink();
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void StartBlinking(mozilla::WidgetGUIEvent* aEvent, bool aFlipChecked);
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void StopBlinking();
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void CreateMenuCommandEvent(mozilla::WidgetGUIEvent* aEvent,
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bool aFlipChecked);
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void PassMenuCommandEventToPopupManager();
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protected:
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#ifdef DEBUG_LAYOUT
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nsresult SetXULDebug(nsBoxLayoutState& aState, nsIFrame* aList, bool aDebug);
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#endif
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nsresult Notify(nsITimer* aTimer);
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bool mIsMenu; // Whether or not we can even have children or not.
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bool mChecked; // are we checked?
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bool mIgnoreAccelTextChange; // temporarily set while determining the accelerator key
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nsMenuType mType;
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// Reference to the mediator which wraps this frame.
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RefPtr<nsMenuTimerMediator> mTimerMediator;
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nsCOMPtr<nsITimer> mOpenTimer;
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nsCOMPtr<nsITimer> mBlinkTimer;
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uint8_t mBlinkState; // 0: not blinking, 1: off, 2: on
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RefPtr<nsXULMenuCommandEvent> mDelayedMenuCommandEvent;
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nsString mGroupName;
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}; // class nsMenuFrame
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#endif
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