зеркало из https://github.com/mozilla/gecko-dev.git
312 строки
11 KiB
C++
312 строки
11 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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#ifndef nsIViewManager_h___
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#define nsIViewManager_h___
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#include "nscore.h"
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#include "nsIView.h"
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#include "nsEvent.h"
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class nsIWidget;
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struct nsRect;
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class nsRegion;
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class nsDeviceContext;
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class nsIPresShell;
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#define NS_IVIEWMANAGER_IID \
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{ 0x540610a6, 0x4fdd, 0x4ae3, \
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{ 0x9b, 0xdb, 0xa6, 0x4d, 0x8b, 0xca, 0x02, 0x0f } }
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class nsIViewManager : public nsISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_IVIEWMANAGER_IID)
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/**
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* Initialize the ViewManager
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* Note: this instance does not hold a reference to the presshell
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* because it holds a reference to this instance.
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* @result The result of the initialization, NS_OK if no errors
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*/
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NS_IMETHOD Init(nsDeviceContext* aContext) = 0;
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/**
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* Create an ordinary view
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* @param aBounds initial bounds for view
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* XXX We should eliminate this parameter; you can set the bounds after CreateView
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* @param aParent intended parent for view. this is not actually set in the
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* nsIView through this method. it is only used by the initialization
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* code to walk up the view tree, if necessary, to find resources.
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* XXX We should eliminate this parameter!
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* @param aVisibilityFlag initial visibility state of view
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* XXX We should eliminate this parameter; you can set it after CreateView
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* @result The new view
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*/
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NS_IMETHOD_(nsIView*) CreateView(const nsRect& aBounds,
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const nsIView* aParent,
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nsViewVisibility aVisibilityFlag = nsViewVisibility_kShow) = 0;
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/**
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* Get the root of the view tree.
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* @result the root view
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*/
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NS_IMETHOD_(nsIView*) GetRootView() = 0;
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/**
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* Set the root of the view tree. Does not destroy the current root view.
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* aView may have a parent view managed by a different view manager.
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* aView may have a widget (anything but printing) or may not (printing).
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* @param aView view to set as root
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*/
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NS_IMETHOD SetRootView(nsIView *aView) = 0;
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/**
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* Get the dimensions of the root window. The dimensions are in
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* twips
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* @param aWidth out parameter for width of window in twips
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* @param aHeight out parameter for height of window in twips
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*/
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NS_IMETHOD GetWindowDimensions(nscoord *aWidth, nscoord *aHeight) = 0;
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/**
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* Set the dimensions of the root window.
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* Called if the root window is resized. The dimensions are in
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* twips
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* @param aWidth of window in twips
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* @param aHeight of window in twips
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*/
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NS_IMETHOD SetWindowDimensions(nscoord aWidth, nscoord aHeight) = 0;
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/**
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* Do any resizes that are pending.
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*/
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NS_IMETHOD FlushDelayedResize(bool aDoReflow) = 0;
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/**
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* Called to inform the view manager that the entire area of a view
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* is dirty and needs to be redrawn.
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* @param aView view to paint. should be root view
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*/
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NS_IMETHOD InvalidateView(nsIView *aView) = 0;
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/**
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* Called to inform the view manager that some portion of a view is dirty and
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* needs to be redrawn. The rect passed in should be in the view's coordinate
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* space. Does not check for paint suppression.
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* @param aView view to paint. should be root view
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* @param rect rect to mark as damaged
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*/
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NS_IMETHOD InvalidateViewNoSuppression(nsIView *aView, const nsRect &aRect) = 0;
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/**
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* Called to inform the view manager that it should invalidate all views.
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*/
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NS_IMETHOD InvalidateAllViews() = 0;
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/**
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* Called to dispatch an event to the appropriate view. Often called
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* as a result of receiving a mouse or keyboard event from the widget
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* event system.
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* @param aEvent event to dispatch
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* @param aViewTarget dispatch the event to this view
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* @param aStatus event handling status
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*/
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NS_IMETHOD DispatchEvent(nsGUIEvent *aEvent,
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nsIView* aViewTarget, nsEventStatus* aStatus) = 0;
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/**
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* Given a parent view, insert another view as its child.
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* aSibling and aAbove control the "document order" for the insertion.
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* If aSibling is null, the view is inserted at the end of the document order
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* if aAfter is true, otherwise it is inserted at the beginning.
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* If aSibling is non-null, then if aAfter is true, the view is inserted
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* after the sibling in document order (appearing above the sibling unless
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* overriden by z-order).
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* If it is false, the view is inserted before the sibling.
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* The view manager generates the appopriate dirty regions.
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* @param aParent parent view
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* @param aChild child view
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* @param aSibling sibling view
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* @param aAfter after or before in the document order
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*/
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NS_IMETHOD InsertChild(nsIView *aParent, nsIView *aChild, nsIView *aSibling,
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bool aAfter) = 0;
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/**
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* Remove a specific child view from its parent. This will NOT remove its placeholder
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* if there is one.
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* The view manager generates the appropriate dirty regions.
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* @param aParent parent view
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* @param aChild child view
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*/
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NS_IMETHOD RemoveChild(nsIView *aChild) = 0;
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/**
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* Move a view to the specified position, provided in parent coordinates.
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* The new position is the (0, 0) origin for the view's coordinate system.
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* The view's bounds may extend above or to the left of this point.
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* The view manager generates the appropriate dirty regions.
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* @param aView view to move
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* @param aX x value for new view position
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* @param aY y value for new view position
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*/
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NS_IMETHOD MoveViewTo(nsIView *aView, nscoord aX, nscoord aY) = 0;
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/**
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* Resize a view. In addition to setting the width and height, you can
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* set the x and y of its bounds relative to its position. Negative x and y
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* will let the view extend above and to the left of the (0,0) point in its
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* coordinate system.
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* The view manager generates the appropriate dirty regions.
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* @param aView view to move
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* @param the new bounds relative to the current position
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* @param RepaintExposedAreaOnly
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* if true Repaint only the expanded or contracted region,
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* if false Repaint the union of the old and new rectangles.
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*/
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NS_IMETHOD ResizeView(nsIView *aView, const nsRect &aRect,
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bool aRepaintExposedAreaOnly = false) = 0;
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/**
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* Set the visibility of a view. Hidden views have the effect of hiding
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* their descendants as well. This does not affect painting, so layout
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* is responsible for ensuring that content in hidden views is not
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* painted nor handling events. It does affect the visibility of widgets;
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* if a view is hidden, descendant views with widgets have their widgets
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* hidden.
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* The view manager generates the appropriate dirty regions.
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* @param aView view to change visibility state of
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* @param visible new visibility state
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*/
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NS_IMETHOD SetViewVisibility(nsIView *aView, nsViewVisibility aVisible) = 0;
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/**
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* Set the z-index of a view. Positive z-indices mean that a view
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* is above its parent in z-order. Negative z-indices mean that a
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* view is below its parent.
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* The view manager generates the appropriate dirty regions.
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* @param aAutoZIndex indicate that the z-index of a view is "auto". An "auto" z-index
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* means that the view does not define a new stacking context,
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* which means that the z-indicies of the view's children are
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* relative to the view's siblings.
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* @param aView view to change z depth of
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* @param aZindex explicit z depth
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* @param aTopMost used when this view is z-index:auto to compare against
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* other z-index:auto views.
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* true if the view should be topmost when compared with
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* other z-index:auto views.
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*/
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NS_IMETHOD SetViewZIndex(nsIView *aView, bool aAutoZIndex, PRInt32 aZindex, bool aTopMost = false) = 0;
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/**
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* Set whether the view "floats" above all other views,
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* which tells the compositor not to consider higher views in
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* the view hierarchy that would geometrically intersect with
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* this view. This is a hack, but it fixes some problems with
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* views that need to be drawn in front of all other views.
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*/
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NS_IMETHOD SetViewFloating(nsIView *aView, bool aFloatingView) = 0;
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/**
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* Set the presshell associated with this manager
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* @param aPresShell - new presshell
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*/
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virtual void SetPresShell(nsIPresShell *aPresShell) = 0;
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/**
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* Get the pres shell associated with this manager
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*/
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virtual nsIPresShell* GetPresShell() = 0;
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/**
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* Get the device context associated with this manager
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* @result device context
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*/
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NS_IMETHOD GetDeviceContext(nsDeviceContext *&aContext) = 0;
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/**
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* A stack class for disallowing changes that would enter painting. For
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* example, popup widgets shouldn't be resized during reflow, since doing so
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* might cause synchronous painting inside reflow which is forbidden.
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* While refresh is disabled, widget geometry changes are deferred and will
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* be handled later, either from the refresh driver or from an NS_WILL_PAINT
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* event.
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* We don't want to defer widget geometry changes all the time. Resizing a
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* popup from script doesn't need to be deferred, for example, especially
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* since popup widget geometry is observable from script and expected to
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* update synchronously.
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*/
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class NS_STACK_CLASS AutoDisableRefresh {
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public:
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AutoDisableRefresh(nsIViewManager* aVM) {
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if (aVM) {
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mRootVM = aVM->IncrementDisableRefreshCount();
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}
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}
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~AutoDisableRefresh() {
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if (mRootVM) {
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mRootVM->DecrementDisableRefreshCount();
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}
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}
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private:
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AutoDisableRefresh(const AutoDisableRefresh& aOther);
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const AutoDisableRefresh& operator=(const AutoDisableRefresh& aOther);
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nsCOMPtr<nsIViewManager> mRootVM;
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};
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private:
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friend class AutoDisableRefresh;
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virtual nsIViewManager* IncrementDisableRefreshCount() = 0;
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virtual void DecrementDisableRefreshCount() = 0;
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public:
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/**
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* Retrieve the widget at the root of the nearest enclosing
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* view manager whose root view has a widget.
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*/
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NS_IMETHOD GetRootWidget(nsIWidget **aWidget) = 0;
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/**
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* Indicate whether the viewmanager is currently painting
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*
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* @param aPainting true if the viewmanager is painting
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* false otherwise
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*/
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NS_IMETHOD IsPainting(bool& aIsPainting)=0;
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/**
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* Retrieve the time of the last user event. User events
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* include mouse and keyboard events. The viewmanager
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* saves the time of the last user event.
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*
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* @param aTime Last user event time in microseconds
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*/
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NS_IMETHOD GetLastUserEventTime(PRUint32& aTime)=0;
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/**
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* Find the nearest display root view for the view aView. This is the view for
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* the nearest enclosing popup or the root view for the root document.
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*/
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static nsIView* GetDisplayRootFor(nsIView* aView);
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/**
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* Flush the accumulated dirty region to the widget and update widget
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* geometry.
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*/
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virtual void ProcessPendingUpdates()=0;
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/**
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* Just update widget geometry without flushing the dirty region
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*/
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virtual void UpdateWidgetGeometry() = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIViewManager, NS_IVIEWMANAGER_IID)
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#endif // nsIViewManager_h___
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