зеркало из https://github.com/mozilla/gecko-dev.git
543 строки
22 KiB
C++
543 строки
22 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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// nsMenuPopupFrame
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//
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#ifndef nsMenuPopupFrame_h__
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#define nsMenuPopupFrame_h__
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#include "mozilla/Attributes.h"
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#include "nsIAtom.h"
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#include "nsGkAtoms.h"
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#include "nsCOMPtr.h"
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#include "nsMenuFrame.h"
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#include "nsBoxFrame.h"
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#include "nsMenuParent.h"
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#include "nsITimer.h"
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class nsIWidget;
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// XUL popups can be in several different states. When opening a popup, the
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// state changes as follows:
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// ePopupClosed - initial state
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// ePopupShowing - during the period when the popupshowing event fires
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// ePopupOpening - between the popupshowing event and being visible. Creation
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// of the child frames, layout and reflow occurs in this
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// state. The popup is stored in the popup manager's list of
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// open popups during this state.
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// ePopupVisible - layout is done and the popup's view and widget are made
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// visible. The popup is visible on screen but may be
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// transitioning. The popupshown event has not yet fired.
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// ePopupShown - the popup has been shown and is fully ready. This state is
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// assigned just before the popupshown event fires.
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// When closing a popup:
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// ePopupHidden - during the period when the popuphiding event fires and
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// the popup is removed.
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// ePopupClosed - the popup's widget is made invisible.
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enum nsPopupState {
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// state when a popup is not open
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ePopupClosed,
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// state from when a popup is requested to be shown to after the
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// popupshowing event has been fired.
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ePopupShowing,
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// state while a popup is open but the widget is not yet visible
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ePopupOpening,
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// state while a popup is visible and waiting for the popupshown event
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ePopupVisible,
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// state while a popup is open and visible on screen
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ePopupShown,
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// state from when a popup is requested to be hidden to when it is closed.
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ePopupHiding,
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// state which indicates that the popup was hidden without firing the
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// popuphiding or popuphidden events. It is used when executing a menu
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// command because the menu needs to be hidden before the command event
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// fires, yet the popuphiding and popuphidden events are fired after. This
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// state can also occur when the popup is removed because the document is
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// unloaded.
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ePopupInvisible
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};
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// How a popup may be flipped. Flipping to the outside edge is like how
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// a submenu would work. The entire popup is flipped to the opposite side
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// of the anchor.
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enum FlipStyle {
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FlipStyle_None = 0,
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FlipStyle_Outside = 1,
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FlipStyle_Inside = 2
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};
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// Values for the flip attribute
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enum FlipType {
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FlipType_Default = 0,
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FlipType_None = 1, // don't try to flip or translate to stay onscreen
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FlipType_Both = 2, // flip in both directions
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FlipType_Slide = 3 // allow the arrow to "slide" instead of resizing
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};
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// values are selected so that the direction can be flipped just by
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// changing the sign
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#define POPUPALIGNMENT_NONE 0
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#define POPUPALIGNMENT_TOPLEFT 1
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#define POPUPALIGNMENT_TOPRIGHT -1
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#define POPUPALIGNMENT_BOTTOMLEFT 2
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#define POPUPALIGNMENT_BOTTOMRIGHT -2
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#define POPUPALIGNMENT_LEFTCENTER 16
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#define POPUPALIGNMENT_RIGHTCENTER -16
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#define POPUPALIGNMENT_TOPCENTER 17
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#define POPUPALIGNMENT_BOTTOMCENTER 18
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// The constants here are selected so that horizontally and vertically flipping
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// can be easily handled using the two flip macros below.
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#define POPUPPOSITION_UNKNOWN -1
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#define POPUPPOSITION_BEFORESTART 0
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#define POPUPPOSITION_BEFOREEND 1
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#define POPUPPOSITION_AFTERSTART 2
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#define POPUPPOSITION_AFTEREND 3
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#define POPUPPOSITION_STARTBEFORE 4
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#define POPUPPOSITION_ENDBEFORE 5
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#define POPUPPOSITION_STARTAFTER 6
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#define POPUPPOSITION_ENDAFTER 7
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#define POPUPPOSITION_OVERLAP 8
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#define POPUPPOSITION_AFTERPOINTER 9
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#define POPUPPOSITION_HFLIP(v) (v ^ 1)
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#define POPUPPOSITION_VFLIP(v) (v ^ 2)
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#define INC_TYP_INTERVAL 1000 // 1s. If the interval between two keypresses is shorter than this,
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// treat as a continue typing
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// XXX, kyle.yuan@sun.com, there are 4 definitions for the same purpose:
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// nsMenuPopupFrame.h, nsListControlFrame.cpp, listbox.xml, tree.xml
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// need to find a good place to put them together.
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// if someone changes one, please also change the other.
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#define CONTEXT_MENU_OFFSET_PIXELS 2
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nsIFrame* NS_NewMenuPopupFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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class nsViewManager;
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class nsView;
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class nsMenuPopupFrame;
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// this class is used for dispatching popupshown events asynchronously.
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class nsXULPopupShownEvent : public nsRunnable, public nsIDOMEventListener
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{
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public:
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nsXULPopupShownEvent(nsIContent *aPopup, nsPresContext* aPresContext)
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: mPopup(aPopup), mPresContext(aPresContext)
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{
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}
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_NSIRUNNABLE
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NS_DECL_NSIDOMEVENTLISTENER
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void CancelListener();
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protected:
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virtual ~nsXULPopupShownEvent() { }
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private:
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nsCOMPtr<nsIContent> mPopup;
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nsRefPtr<nsPresContext> mPresContext;
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};
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class nsMenuPopupFrame : public nsBoxFrame, public nsMenuParent
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{
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public:
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NS_DECL_QUERYFRAME_TARGET(nsMenuPopupFrame)
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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nsMenuPopupFrame(nsIPresShell* aShell, nsStyleContext* aContext);
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// nsMenuParent interface
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virtual nsMenuFrame* GetCurrentMenuItem() MOZ_OVERRIDE;
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NS_IMETHOD SetCurrentMenuItem(nsMenuFrame* aMenuItem) MOZ_OVERRIDE;
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virtual void CurrentMenuIsBeingDestroyed() MOZ_OVERRIDE;
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NS_IMETHOD ChangeMenuItem(nsMenuFrame* aMenuItem, bool aSelectFirstItem) MOZ_OVERRIDE;
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// as popups are opened asynchronously, the popup pending state is used to
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// prevent multiple requests from attempting to open the same popup twice
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nsPopupState PopupState() { return mPopupState; }
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void SetPopupState(nsPopupState aPopupState) { mPopupState = aPopupState; }
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NS_IMETHOD SetActive(bool aActiveFlag) MOZ_OVERRIDE { return NS_OK; } // We don't care.
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virtual bool IsActive() MOZ_OVERRIDE { return false; }
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virtual bool IsMenuBar() MOZ_OVERRIDE { return false; }
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/*
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* When this popup is open, should clicks outside of it be consumed?
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* Return true if the popup should rollup on an outside click,
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* but consume that click so it can't be used for anything else.
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* Return false to allow clicks outside the popup to activate content
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* even when the popup is open.
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* ---------------------------------------------------------------------
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*
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* Should clicks outside of a popup be eaten?
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*
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* Menus Autocomplete Comboboxes
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* Mac Eat No Eat
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* Win No No Eat
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* Unix Eat No Eat
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*
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*/
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bool ConsumeOutsideClicks();
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virtual bool IsContextMenu() MOZ_OVERRIDE { return mIsContextMenu; }
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virtual bool MenuClosed() MOZ_OVERRIDE { return true; }
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virtual void LockMenuUntilClosed(bool aLock) MOZ_OVERRIDE;
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virtual bool IsMenuLocked() MOZ_OVERRIDE { return mIsMenuLocked; }
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nsIWidget* GetWidget();
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// The dismissal listener gets created and attached to the window.
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void AttachedDismissalListener();
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// Overridden methods
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
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virtual nsresult AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType) MOZ_OVERRIDE;
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virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
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// returns true if the popup is a panel with the noautohide attribute set to
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// true. These panels do not roll up automatically.
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bool IsNoAutoHide() const;
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nsPopupLevel PopupLevel() const
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{
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return PopupLevel(IsNoAutoHide());
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}
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void EnsureWidget();
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nsresult CreateWidgetForView(nsView* aView);
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uint8_t GetShadowStyle();
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virtual void SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList) MOZ_OVERRIDE;
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virtual bool IsLeaf() const MOZ_OVERRIDE;
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// layout, position and display the popup as needed
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void LayoutPopup(nsBoxLayoutState& aState, nsIFrame* aParentMenu,
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nsIFrame* aAnchor, bool aSizedToPopup);
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nsView* GetRootViewForPopup(nsIFrame* aStartFrame);
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// set the position of the popup either relative to the anchor aAnchorFrame
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// (or the frame for mAnchorContent if aAnchorFrame is null) or at a specific
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// point if a screen position (mScreenXPos and mScreenYPos) are set. The popup
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// will be adjusted so that it is on screen. If aIsMove is true, then the popup
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// is being moved, and should not be flipped.
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nsresult SetPopupPosition(nsIFrame* aAnchorFrame, bool aIsMove, bool aSizedToPopup);
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bool HasGeneratedChildren() { return mGeneratedChildren; }
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void SetGeneratedChildren() { mGeneratedChildren = true; }
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// called when the Enter key is pressed while the popup is open. This will
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// just pass the call down to the current menu, if any. If a current menu
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// should be opened as a result, this method should return the frame for
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// that menu, or null if no menu should be opened. Also, calling Enter will
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// reset the current incremental search string, calculated in
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// FindMenuWithShortcut.
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nsMenuFrame* Enter(mozilla::WidgetGUIEvent* aEvent);
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nsPopupType PopupType() const { return mPopupType; }
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bool IsMenu() MOZ_OVERRIDE { return mPopupType == ePopupTypeMenu; }
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bool IsOpen() MOZ_OVERRIDE { return mPopupState == ePopupOpening ||
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mPopupState == ePopupVisible ||
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mPopupState == ePopupShown; }
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bool IsVisible() { return mPopupState == ePopupVisible ||
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mPopupState == ePopupShown; }
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bool IsMouseTransparent() { return mMouseTransparent; }
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static nsIContent* GetTriggerContent(nsMenuPopupFrame* aMenuPopupFrame);
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void ClearTriggerContent() { mTriggerContent = nullptr; }
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// returns true if the popup is in a content shell, or false for a popup in
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// a chrome shell
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bool IsInContentShell() { return mInContentShell; }
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// the Initialize methods are used to set the anchor position for
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// each way of opening a popup.
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void InitializePopup(nsIContent* aAnchorContent,
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nsIContent* aTriggerContent,
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const nsAString& aPosition,
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int32_t aXPos, int32_t aYPos,
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bool aAttributesOverride);
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/**
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* @param aIsContextMenu if true, then the popup is
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* positioned at a slight offset from aXPos/aYPos to ensure the
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* (presumed) mouse position is not over the menu.
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*/
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void InitializePopupAtScreen(nsIContent* aTriggerContent,
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int32_t aXPos, int32_t aYPos,
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bool aIsContextMenu);
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void InitializePopupWithAnchorAlign(nsIContent* aAnchorContent,
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nsAString& aAnchor,
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nsAString& aAlign,
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int32_t aXPos, int32_t aYPos);
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// indicate that the popup should be opened
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void ShowPopup(bool aIsContextMenu, bool aSelectFirstItem);
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// indicate that the popup should be hidden. The new state should either be
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// ePopupClosed or ePopupInvisible.
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void HidePopup(bool aDeselectMenu, nsPopupState aNewState);
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// locate and return the menu frame that should be activated for the
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// supplied key event. If doAction is set to true by this method,
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// then the menu's action should be carried out, as if the user had pressed
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// the Enter key. If doAction is false, the menu should just be highlighted.
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// This method also handles incremental searching in menus so the user can
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// type the first few letters of an item/s name to select it.
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nsMenuFrame* FindMenuWithShortcut(nsIDOMKeyEvent* aKeyEvent, bool& doAction);
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void ClearIncrementalString() { mIncrementalString.Truncate(); }
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virtual nsIAtom* GetType() const MOZ_OVERRIDE { return nsGkAtoms::menuPopupFrame; }
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
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{
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return MakeFrameName(NS_LITERAL_STRING("MenuPopup"), aResult);
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}
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#endif
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void EnsureMenuItemIsVisible(nsMenuFrame* aMenuFrame);
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// Move the popup to the screen coordinate (aLeft, aTop) in CSS pixels.
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// If aUpdateAttrs is true, and the popup already has left or top attributes,
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// then those attributes are updated to the new location.
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// The frame may be destroyed by this method.
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void MoveTo(int32_t aLeft, int32_t aTop, bool aUpdateAttrs);
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void MoveToAnchor(nsIContent* aAnchorContent,
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const nsAString& aPosition,
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int32_t aXPos, int32_t aYPos,
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bool aAttributesOverride);
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bool GetAutoPosition();
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void SetAutoPosition(bool aShouldAutoPosition);
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void SetConsumeRollupEvent(uint32_t aConsumeMode);
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nsIScrollableFrame* GetScrollFrame(nsIFrame* aStart);
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// For a popup that should appear anchored at the given rect, determine
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// the screen area that it is constrained by. This will be the available
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// area of the screen the popup should be displayed on. Content popups,
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// however, will also be constrained by the content area, given by
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// aRootScreenRect. All coordinates are in app units.
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// For non-toplevel popups (which will always be panels), we will also
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// constrain them to the available screen rect, ie they will not fall
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// underneath the taskbar, dock or other fixed OS elements.
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nsRect GetConstraintRect(const nsRect& aAnchorRect, const nsRect& aRootScreenRect,
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nsPopupLevel aPopupLevel);
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// Determines whether the given edges of the popup may be moved, where
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// aHorizontalSide and aVerticalSide are one of the NS_SIDE_* constants, or
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// 0 for no movement in that direction. aChange is the distance to move on
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// those sides. If will be reset to 0 if the side cannot be adjusted at all
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// in that direction. For example, a popup cannot be moved if it is anchored
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// on a particular side.
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//
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// Later, when bug 357725 is implemented, we can make this adjust aChange by
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// the amount that the side can be resized, so that minimums and maximums
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// can be taken into account.
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void CanAdjustEdges(int8_t aHorizontalSide, int8_t aVerticalSide, nsIntPoint& aChange);
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// Return true if the popup is positioned relative to an anchor.
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bool IsAnchored() const { return mScreenXPos == -1 && mScreenYPos == -1; }
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// Return the anchor if there is one.
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nsIContent* GetAnchor() const { return mAnchorContent; }
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// Return the screen coordinates of the popup, or (-1, -1) if anchored.
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// This position is in CSS pixels.
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nsIntPoint ScreenPosition() const { return nsIntPoint(mScreenXPos, mScreenYPos); }
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nsIntPoint GetLastClientOffset() const { return mLastClientOffset; }
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// Return the alignment of the popup
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int8_t GetAlignmentPosition() const;
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// Return the offset applied to the alignment of the popup
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nscoord GetAlignmentOffset() const { return mAlignmentOffset; }
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// Clear the mPopupShownDispatcher, remove the listener and return true if
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// mPopupShownDispatcher was non-null.
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bool ClearPopupShownDispatcher()
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{
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if (mPopupShownDispatcher) {
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mPopupShownDispatcher->CancelListener();
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mPopupShownDispatcher = nullptr;
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return true;
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}
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return false;
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}
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protected:
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// returns the popup's level.
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nsPopupLevel PopupLevel(bool aIsNoAutoHide) const;
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// redefine to tell the box system not to move the views.
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virtual void GetLayoutFlags(uint32_t& aFlags) MOZ_OVERRIDE;
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void InitPositionFromAnchorAlign(const nsAString& aAnchor,
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const nsAString& aAlign);
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// return the position where the popup should be, when it should be
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// anchored at anchorRect. aHFlip and aVFlip will be set if the popup may be
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// flipped in that direction if there is not enough space available.
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nsPoint AdjustPositionForAnchorAlign(nsRect& anchorRect,
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FlipStyle& aHFlip, FlipStyle& aVFlip);
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// check if the popup will fit into the available space and resize it. This
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// method handles only one axis at a time so is called twice, once for
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// horizontal and once for vertical. All arguments are specified for this
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// one axis. All coordinates are in app units relative to the screen.
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// aScreenPoint - the point where the popup should appear
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// aSize - the size of the popup
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// aScreenBegin - the left or top edge of the screen
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// aScreenEnd - the right or bottom edge of the screen
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// aAnchorBegin - the left or top edge of the anchor rectangle
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// aAnchorEnd - the right or bottom edge of the anchor rectangle
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// aMarginBegin - the left or top margin of the popup
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// aMarginEnd - the right or bottom margin of the popup
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// aOffsetForContextMenu - the additional offset to add for context menus
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// aFlip - how to flip or resize the popup when there isn't space
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// aFlipSide - pointer to where current flip mode is stored
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nscoord FlipOrResize(nscoord& aScreenPoint, nscoord aSize,
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nscoord aScreenBegin, nscoord aScreenEnd,
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nscoord aAnchorBegin, nscoord aAnchorEnd,
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nscoord aMarginBegin, nscoord aMarginEnd,
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nscoord aOffsetForContextMenu, FlipStyle aFlip,
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bool* aFlipSide);
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// check if the popup can fit into the available space by "sliding" (i.e.,
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// by having the anchor arrow slide along one axis and only resizing if that
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// can't provide the requested size). Only one axis can be slid - the other
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// axis is "flipped" as normal. This method can handle either axis, but is
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// only called for the sliding axis. All coordinates are in app units
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// relative to the screen.
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// aScreenPoint - the point where the popup should appear
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// aSize - the size of the popup
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// aScreenBegin - the left or top edge of the screen
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// aScreenEnd - the right or bottom edge of the screen
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// aOffset - the amount by which the arrow must be slid such that it is
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// still aligned with the anchor.
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// Result is the new size of the popup, which will typically be the same
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// as aSize, unless aSize is greater than the screen width/height.
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nscoord SlideOrResize(nscoord& aScreenPoint, nscoord aSize,
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nscoord aScreenBegin, nscoord aScreenEnd,
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nscoord *aOffset);
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// Move the popup to the position specified in its |left| and |top| attributes.
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void MoveToAttributePosition();
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/**
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* Return whether the popup direction should be RTL.
|
|
* If the popup has an anchor, its direction is the anchor direction.
|
|
* Otherwise, its the general direction of the UI.
|
|
*
|
|
* Return whether the popup direction should be RTL.
|
|
*/
|
|
bool IsDirectionRTL() const {
|
|
return mAnchorContent && mAnchorContent->GetPrimaryFrame()
|
|
? mAnchorContent->GetPrimaryFrame()->StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL
|
|
: StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL;
|
|
}
|
|
|
|
// Create a popup view for this frame. The view is added a child of the root
|
|
// view, and is initially hidden.
|
|
void CreatePopupView();
|
|
|
|
nsString mIncrementalString; // for incremental typing navigation
|
|
|
|
// the content that the popup is anchored to, if any, which may be in a
|
|
// different document than the popup.
|
|
nsCOMPtr<nsIContent> mAnchorContent;
|
|
|
|
// the content that triggered the popup, typically the node where the mouse
|
|
// was clicked. It will be cleared when the popup is hidden.
|
|
nsCOMPtr<nsIContent> mTriggerContent;
|
|
|
|
nsMenuFrame* mCurrentMenu; // The current menu that is active.
|
|
|
|
nsRefPtr<nsXULPopupShownEvent> mPopupShownDispatcher;
|
|
|
|
// A popup's preferred size may be different than its actual size stored in
|
|
// mRect in the case where the popup was resized because it was too large
|
|
// for the screen. The preferred size mPrefSize holds the full size the popup
|
|
// would be before resizing. Computations are performed using this size.
|
|
nsSize mPrefSize;
|
|
|
|
// The position of the popup, in CSS pixels.
|
|
// The screen coordinates, if set to values other than -1,
|
|
// override mXPos and mYPos.
|
|
int32_t mXPos;
|
|
int32_t mYPos;
|
|
int32_t mScreenXPos;
|
|
int32_t mScreenYPos;
|
|
|
|
// If the panel prefers to "slide" rather than resize, then the arrow gets
|
|
// positioned at this offset (along either the x or y axis, depending on
|
|
// mPosition)
|
|
nscoord mAlignmentOffset;
|
|
|
|
// The value of the client offset of our widget the last time we positioned
|
|
// ourselves. We store this so that we can detect when it changes but the
|
|
// position of our widget didn't change.
|
|
nsIntPoint mLastClientOffset;
|
|
|
|
nsPopupType mPopupType; // type of popup
|
|
nsPopupState mPopupState; // open state of the popup
|
|
|
|
// popup alignment relative to the anchor node
|
|
int8_t mPopupAlignment;
|
|
int8_t mPopupAnchor;
|
|
int8_t mPosition;
|
|
|
|
// One of nsIPopupBoxObject::ROLLUP_DEFAULT/ROLLUP_CONSUME/ROLLUP_NO_CONSUME
|
|
int8_t mConsumeRollupEvent;
|
|
FlipType mFlip; // Whether to flip
|
|
|
|
bool mIsOpenChanged; // true if the open state changed since the last layout
|
|
bool mIsContextMenu; // true for context menus
|
|
// true if we need to offset the popup to ensure it's not under the mouse
|
|
bool mAdjustOffsetForContextMenu;
|
|
bool mGeneratedChildren; // true if the contents have been created
|
|
|
|
bool mMenuCanOverlapOSBar; // can we appear over the taskbar/menubar?
|
|
bool mShouldAutoPosition; // Should SetPopupPosition be allowed to auto position popup?
|
|
bool mInContentShell; // True if the popup is in a content shell
|
|
bool mIsMenuLocked; // Should events inside this menu be ignored?
|
|
bool mMouseTransparent; // True if this is a popup is transparent to mouse events
|
|
|
|
// the flip modes that were used when the popup was opened
|
|
bool mHFlip;
|
|
bool mVFlip;
|
|
|
|
static int8_t sDefaultLevelIsTop;
|
|
}; // class nsMenuPopupFrame
|
|
|
|
#endif
|