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gecko-dev/layout/xul/nsMenuPopupFrame.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/. */
//
// nsMenuPopupFrame
//
#ifndef nsMenuPopupFrame_h__
#define nsMenuPopupFrame_h__
#include "mozilla/Attributes.h"
#include "nsIAtom.h"
#include "nsGkAtoms.h"
#include "nsCOMPtr.h"
#include "nsMenuFrame.h"
#include "nsBoxFrame.h"
#include "nsMenuParent.h"
#include "nsITimer.h"
class nsIWidget;
// XUL popups can be in several different states. When opening a popup, the
// state changes as follows:
// ePopupClosed - initial state
// ePopupShowing - during the period when the popupshowing event fires
// ePopupOpening - between the popupshowing event and being visible. Creation
// of the child frames, layout and reflow occurs in this
// state. The popup is stored in the popup manager's list of
// open popups during this state.
// ePopupVisible - layout is done and the popup's view and widget are made
// visible. The popup is visible on screen but may be
// transitioning. The popupshown event has not yet fired.
// ePopupShown - the popup has been shown and is fully ready. This state is
// assigned just before the popupshown event fires.
// When closing a popup:
// ePopupHidden - during the period when the popuphiding event fires and
// the popup is removed.
// ePopupClosed - the popup's widget is made invisible.
enum nsPopupState {
// state when a popup is not open
ePopupClosed,
// state from when a popup is requested to be shown to after the
// popupshowing event has been fired.
ePopupShowing,
// state while a popup is open but the widget is not yet visible
ePopupOpening,
// state while a popup is visible and waiting for the popupshown event
ePopupVisible,
// state while a popup is open and visible on screen
ePopupShown,
// state from when a popup is requested to be hidden to when it is closed.
ePopupHiding,
// state which indicates that the popup was hidden without firing the
// popuphiding or popuphidden events. It is used when executing a menu
// command because the menu needs to be hidden before the command event
// fires, yet the popuphiding and popuphidden events are fired after. This
// state can also occur when the popup is removed because the document is
// unloaded.
ePopupInvisible
};
// How a popup may be flipped. Flipping to the outside edge is like how
// a submenu would work. The entire popup is flipped to the opposite side
// of the anchor.
enum FlipStyle {
FlipStyle_None = 0,
FlipStyle_Outside = 1,
FlipStyle_Inside = 2
};
// Values for the flip attribute
enum FlipType {
FlipType_Default = 0,
FlipType_None = 1, // don't try to flip or translate to stay onscreen
FlipType_Both = 2, // flip in both directions
FlipType_Slide = 3 // allow the arrow to "slide" instead of resizing
};
// values are selected so that the direction can be flipped just by
// changing the sign
#define POPUPALIGNMENT_NONE 0
#define POPUPALIGNMENT_TOPLEFT 1
#define POPUPALIGNMENT_TOPRIGHT -1
#define POPUPALIGNMENT_BOTTOMLEFT 2
#define POPUPALIGNMENT_BOTTOMRIGHT -2
#define POPUPALIGNMENT_LEFTCENTER 16
#define POPUPALIGNMENT_RIGHTCENTER -16
#define POPUPALIGNMENT_TOPCENTER 17
#define POPUPALIGNMENT_BOTTOMCENTER 18
// The constants here are selected so that horizontally and vertically flipping
// can be easily handled using the two flip macros below.
#define POPUPPOSITION_UNKNOWN -1
#define POPUPPOSITION_BEFORESTART 0
#define POPUPPOSITION_BEFOREEND 1
#define POPUPPOSITION_AFTERSTART 2
#define POPUPPOSITION_AFTEREND 3
#define POPUPPOSITION_STARTBEFORE 4
#define POPUPPOSITION_ENDBEFORE 5
#define POPUPPOSITION_STARTAFTER 6
#define POPUPPOSITION_ENDAFTER 7
#define POPUPPOSITION_OVERLAP 8
#define POPUPPOSITION_AFTERPOINTER 9
#define POPUPPOSITION_HFLIP(v) (v ^ 1)
#define POPUPPOSITION_VFLIP(v) (v ^ 2)
#define INC_TYP_INTERVAL 1000 // 1s. If the interval between two keypresses is shorter than this,
// treat as a continue typing
// XXX, kyle.yuan@sun.com, there are 4 definitions for the same purpose:
// nsMenuPopupFrame.h, nsListControlFrame.cpp, listbox.xml, tree.xml
// need to find a good place to put them together.
// if someone changes one, please also change the other.
#define CONTEXT_MENU_OFFSET_PIXELS 2
nsIFrame* NS_NewMenuPopupFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
class nsViewManager;
class nsView;
class nsMenuPopupFrame;
// this class is used for dispatching popupshown events asynchronously.
class nsXULPopupShownEvent : public nsRunnable, public nsIDOMEventListener
{
public:
nsXULPopupShownEvent(nsIContent *aPopup, nsPresContext* aPresContext)
: mPopup(aPopup), mPresContext(aPresContext)
{
}
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIRUNNABLE
NS_DECL_NSIDOMEVENTLISTENER
void CancelListener();
protected:
virtual ~nsXULPopupShownEvent() { }
private:
nsCOMPtr<nsIContent> mPopup;
nsRefPtr<nsPresContext> mPresContext;
};
class nsMenuPopupFrame MOZ_FINAL : public nsBoxFrame, public nsMenuParent
{
public:
NS_DECL_QUERYFRAME_TARGET(nsMenuPopupFrame)
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS
explicit nsMenuPopupFrame(nsStyleContext* aContext);
// nsMenuParent interface
virtual nsMenuFrame* GetCurrentMenuItem() MOZ_OVERRIDE;
NS_IMETHOD SetCurrentMenuItem(nsMenuFrame* aMenuItem) MOZ_OVERRIDE;
virtual void CurrentMenuIsBeingDestroyed() MOZ_OVERRIDE;
NS_IMETHOD ChangeMenuItem(nsMenuFrame* aMenuItem, bool aSelectFirstItem) MOZ_OVERRIDE;
// as popups are opened asynchronously, the popup pending state is used to
// prevent multiple requests from attempting to open the same popup twice
nsPopupState PopupState() { return mPopupState; }
void SetPopupState(nsPopupState aPopupState) { mPopupState = aPopupState; }
NS_IMETHOD SetActive(bool aActiveFlag) MOZ_OVERRIDE { return NS_OK; } // We don't care.
virtual bool IsActive() MOZ_OVERRIDE { return false; }
virtual bool IsMenuBar() MOZ_OVERRIDE { return false; }
/*
* When this popup is open, should clicks outside of it be consumed?
* Return true if the popup should rollup on an outside click,
* but consume that click so it can't be used for anything else.
* Return false to allow clicks outside the popup to activate content
* even when the popup is open.
* ---------------------------------------------------------------------
*
* Should clicks outside of a popup be eaten?
*
* Menus Autocomplete Comboboxes
* Mac Eat No Eat
* Win No No Eat
* Unix Eat No Eat
*
*/
bool ConsumeOutsideClicks();
virtual bool IsContextMenu() MOZ_OVERRIDE { return mIsContextMenu; }
virtual bool MenuClosed() MOZ_OVERRIDE { return true; }
virtual void LockMenuUntilClosed(bool aLock) MOZ_OVERRIDE;
virtual bool IsMenuLocked() MOZ_OVERRIDE { return mIsMenuLocked; }
nsIWidget* GetWidget();
// The dismissal listener gets created and attached to the window.
void AttachedDismissalListener();
// Overridden methods
virtual void Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) MOZ_OVERRIDE;
virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
// returns true if the popup is a panel with the noautohide attribute set to
// true. These panels do not roll up automatically.
bool IsNoAutoHide() const;
nsPopupLevel PopupLevel() const
{
return PopupLevel(IsNoAutoHide());
}
void EnsureWidget();
nsresult CreateWidgetForView(nsView* aView);
uint8_t GetShadowStyle();
virtual void SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList) MOZ_OVERRIDE;
virtual bool IsLeaf() const MOZ_OVERRIDE;
// layout, position and display the popup as needed
void LayoutPopup(nsBoxLayoutState& aState, nsIFrame* aParentMenu,
nsIFrame* aAnchor, bool aSizedToPopup);
nsView* GetRootViewForPopup(nsIFrame* aStartFrame);
// set the position of the popup either relative to the anchor aAnchorFrame
// (or the frame for mAnchorContent if aAnchorFrame is null) or at a specific
// point if a screen position (mScreenXPos and mScreenYPos) are set. The popup
// will be adjusted so that it is on screen. If aIsMove is true, then the popup
// is being moved, and should not be flipped.
nsresult SetPopupPosition(nsIFrame* aAnchorFrame, bool aIsMove, bool aSizedToPopup);
bool HasGeneratedChildren() { return mGeneratedChildren; }
void SetGeneratedChildren() { mGeneratedChildren = true; }
// called when the Enter key is pressed while the popup is open. This will
// just pass the call down to the current menu, if any. If a current menu
// should be opened as a result, this method should return the frame for
// that menu, or null if no menu should be opened. Also, calling Enter will
// reset the current incremental search string, calculated in
// FindMenuWithShortcut.
nsMenuFrame* Enter(mozilla::WidgetGUIEvent* aEvent);
nsPopupType PopupType() const { return mPopupType; }
bool IsMenu() MOZ_OVERRIDE { return mPopupType == ePopupTypeMenu; }
bool IsOpen() MOZ_OVERRIDE { return mPopupState == ePopupOpening ||
mPopupState == ePopupVisible ||
mPopupState == ePopupShown; }
bool IsVisible() { return mPopupState == ePopupVisible ||
mPopupState == ePopupShown; }
bool IsMouseTransparent() { return mMouseTransparent; }
static nsIContent* GetTriggerContent(nsMenuPopupFrame* aMenuPopupFrame);
void ClearTriggerContent() { mTriggerContent = nullptr; }
// returns true if the popup is in a content shell, or false for a popup in
// a chrome shell
bool IsInContentShell() { return mInContentShell; }
// the Initialize methods are used to set the anchor position for
// each way of opening a popup.
void InitializePopup(nsIContent* aAnchorContent,
nsIContent* aTriggerContent,
const nsAString& aPosition,
int32_t aXPos, int32_t aYPos,
bool aAttributesOverride);
/**
* @param aIsContextMenu if true, then the popup is
* positioned at a slight offset from aXPos/aYPos to ensure the
* (presumed) mouse position is not over the menu.
*/
void InitializePopupAtScreen(nsIContent* aTriggerContent,
int32_t aXPos, int32_t aYPos,
bool aIsContextMenu);
void InitializePopupWithAnchorAlign(nsIContent* aAnchorContent,
nsAString& aAnchor,
nsAString& aAlign,
int32_t aXPos, int32_t aYPos);
// indicate that the popup should be opened
void ShowPopup(bool aIsContextMenu, bool aSelectFirstItem);
// indicate that the popup should be hidden. The new state should either be
// ePopupClosed or ePopupInvisible.
void HidePopup(bool aDeselectMenu, nsPopupState aNewState);
// locate and return the menu frame that should be activated for the
// supplied key event. If doAction is set to true by this method,
// then the menu's action should be carried out, as if the user had pressed
// the Enter key. If doAction is false, the menu should just be highlighted.
// This method also handles incremental searching in menus so the user can
// type the first few letters of an item/s name to select it.
nsMenuFrame* FindMenuWithShortcut(nsIDOMKeyEvent* aKeyEvent, bool& doAction);
void ClearIncrementalString() { mIncrementalString.Truncate(); }
virtual nsIAtom* GetType() const MOZ_OVERRIDE { return nsGkAtoms::menuPopupFrame; }
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
{
return MakeFrameName(NS_LITERAL_STRING("MenuPopup"), aResult);
}
#endif
void EnsureMenuItemIsVisible(nsMenuFrame* aMenuFrame);
// Move the popup to the screen coordinate (aLeft, aTop) in CSS pixels.
// If aUpdateAttrs is true, and the popup already has left or top attributes,
// then those attributes are updated to the new location.
// The frame may be destroyed by this method.
void MoveTo(int32_t aLeft, int32_t aTop, bool aUpdateAttrs);
void MoveToAnchor(nsIContent* aAnchorContent,
const nsAString& aPosition,
int32_t aXPos, int32_t aYPos,
bool aAttributesOverride);
bool GetAutoPosition();
void SetAutoPosition(bool aShouldAutoPosition);
void SetConsumeRollupEvent(uint32_t aConsumeMode);
nsIScrollableFrame* GetScrollFrame(nsIFrame* aStart);
// For a popup that should appear anchored at the given rect, determine
// the screen area that it is constrained by. This will be the available
// area of the screen the popup should be displayed on. Content popups,
// however, will also be constrained by the content area, given by
// aRootScreenRect. All coordinates are in app units.
// For non-toplevel popups (which will always be panels), we will also
// constrain them to the available screen rect, ie they will not fall
// underneath the taskbar, dock or other fixed OS elements.
nsRect GetConstraintRect(const nsRect& aAnchorRect, const nsRect& aRootScreenRect,
nsPopupLevel aPopupLevel);
// Determines whether the given edges of the popup may be moved, where
// aHorizontalSide and aVerticalSide are one of the NS_SIDE_* constants, or
// 0 for no movement in that direction. aChange is the distance to move on
// those sides. If will be reset to 0 if the side cannot be adjusted at all
// in that direction. For example, a popup cannot be moved if it is anchored
// on a particular side.
//
// Later, when bug 357725 is implemented, we can make this adjust aChange by
// the amount that the side can be resized, so that minimums and maximums
// can be taken into account.
void CanAdjustEdges(int8_t aHorizontalSide, int8_t aVerticalSide, nsIntPoint& aChange);
// Return true if the popup is positioned relative to an anchor.
bool IsAnchored() const { return mScreenXPos == -1 && mScreenYPos == -1; }
// Return the anchor if there is one.
nsIContent* GetAnchor() const { return mAnchorContent; }
// Return the screen coordinates of the popup, or (-1, -1) if anchored.
// This position is in CSS pixels.
nsIntPoint ScreenPosition() const { return nsIntPoint(mScreenXPos, mScreenYPos); }
nsIntPoint GetLastClientOffset() const { return mLastClientOffset; }
// Return the alignment of the popup
int8_t GetAlignmentPosition() const;
// Return the offset applied to the alignment of the popup
nscoord GetAlignmentOffset() const { return mAlignmentOffset; }
// Clear the mPopupShownDispatcher, remove the listener and return true if
// mPopupShownDispatcher was non-null.
bool ClearPopupShownDispatcher()
{
if (mPopupShownDispatcher) {
mPopupShownDispatcher->CancelListener();
mPopupShownDispatcher = nullptr;
return true;
}
return false;
}
protected:
// returns the popup's level.
nsPopupLevel PopupLevel(bool aIsNoAutoHide) const;
// redefine to tell the box system not to move the views.
virtual void GetLayoutFlags(uint32_t& aFlags) MOZ_OVERRIDE;
void InitPositionFromAnchorAlign(const nsAString& aAnchor,
const nsAString& aAlign);
// return the position where the popup should be, when it should be
// anchored at anchorRect. aHFlip and aVFlip will be set if the popup may be
// flipped in that direction if there is not enough space available.
nsPoint AdjustPositionForAnchorAlign(nsRect& anchorRect,
FlipStyle& aHFlip, FlipStyle& aVFlip);
// check if the popup will fit into the available space and resize it. This
// method handles only one axis at a time so is called twice, once for
// horizontal and once for vertical. All arguments are specified for this
// one axis. All coordinates are in app units relative to the screen.
// aScreenPoint - the point where the popup should appear
// aSize - the size of the popup
// aScreenBegin - the left or top edge of the screen
// aScreenEnd - the right or bottom edge of the screen
// aAnchorBegin - the left or top edge of the anchor rectangle
// aAnchorEnd - the right or bottom edge of the anchor rectangle
// aMarginBegin - the left or top margin of the popup
// aMarginEnd - the right or bottom margin of the popup
// aOffsetForContextMenu - the additional offset to add for context menus
// aFlip - how to flip or resize the popup when there isn't space
// aFlipSide - pointer to where current flip mode is stored
nscoord FlipOrResize(nscoord& aScreenPoint, nscoord aSize,
nscoord aScreenBegin, nscoord aScreenEnd,
nscoord aAnchorBegin, nscoord aAnchorEnd,
nscoord aMarginBegin, nscoord aMarginEnd,
nscoord aOffsetForContextMenu, FlipStyle aFlip,
bool* aFlipSide);
// check if the popup can fit into the available space by "sliding" (i.e.,
// by having the anchor arrow slide along one axis and only resizing if that
// can't provide the requested size). Only one axis can be slid - the other
// axis is "flipped" as normal. This method can handle either axis, but is
// only called for the sliding axis. All coordinates are in app units
// relative to the screen.
// aScreenPoint - the point where the popup should appear
// aSize - the size of the popup
// aScreenBegin - the left or top edge of the screen
// aScreenEnd - the right or bottom edge of the screen
// aOffset - the amount by which the arrow must be slid such that it is
// still aligned with the anchor.
// Result is the new size of the popup, which will typically be the same
// as aSize, unless aSize is greater than the screen width/height.
nscoord SlideOrResize(nscoord& aScreenPoint, nscoord aSize,
nscoord aScreenBegin, nscoord aScreenEnd,
nscoord *aOffset);
// Move the popup to the position specified in its |left| and |top| attributes.
void MoveToAttributePosition();
/**
* 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 PopupBoxObject::ROLLUP_DEFAULT/ROLLUP_CONSUME/ROLLUP_NO_CONSUME
uint8_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
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