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216 lines
7.3 KiB
C++
216 lines
7.3 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 nsViewManager_h___
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#define nsViewManager_h___
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#include "nsCOMPtr.h"
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#include "nsIViewManager.h"
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#include "nsCRT.h"
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#include "nsITimer.h"
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#include "prtime.h"
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#include "prinrval.h"
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#include "nsVoidArray.h"
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#include "nsThreadUtils.h"
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#include "nsView.h"
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#include "nsIPresShell.h"
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#include "nsDeviceContext.h"
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/**
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Invalidation model:
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1) Callers call into the view manager and ask it to invalidate a view.
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2) The view manager finds the "right" widget for the view, henceforth called
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the root widget.
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3) The view manager traverses descendants of the root widget and for each
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one that needs invalidation stores the rect to invalidate on the widget's
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view (batching).
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4) The dirty region is flushed to the right widget when
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ProcessPendingUpdates is called from the RefreshDriver.
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It's important to note that widgets associated to views outside this view
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manager can end up being invalidated during step 3. Therefore, the end of a
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view update batch really needs to traverse the entire view tree, to ensure
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that those invalidates happen.
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To cope with this, invalidation processing and should only happen on the
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root viewmanager.
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*/
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class nsViewManager : public nsIViewManager {
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public:
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nsViewManager();
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NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
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NS_DECL_ISUPPORTS
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NS_IMETHOD Init(nsDeviceContext* aContext);
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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);
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NS_IMETHOD_(nsIView*) GetRootView();
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NS_IMETHOD SetRootView(nsIView *aView);
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NS_IMETHOD GetWindowDimensions(nscoord *width, nscoord *height);
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NS_IMETHOD SetWindowDimensions(nscoord width, nscoord height);
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NS_IMETHOD FlushDelayedResize(bool aDoReflow);
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NS_IMETHOD InvalidateView(nsIView *aView);
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NS_IMETHOD InvalidateViewNoSuppression(nsIView *aView, const nsRect &aRect);
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NS_IMETHOD InvalidateAllViews();
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NS_IMETHOD DispatchEvent(nsGUIEvent *aEvent,
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nsIView* aTargetView, nsEventStatus* aStatus);
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NS_IMETHOD InsertChild(nsIView *parent, nsIView *child, nsIView *sibling,
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bool above);
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NS_IMETHOD InsertChild(nsIView *parent, nsIView *child,
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int32_t zindex);
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NS_IMETHOD RemoveChild(nsIView *parent);
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NS_IMETHOD MoveViewTo(nsIView *aView, nscoord aX, nscoord aY);
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NS_IMETHOD ResizeView(nsIView *aView, const nsRect &aRect, bool aRepaintExposedAreaOnly = false);
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NS_IMETHOD SetViewFloating(nsIView *aView, bool aFloating);
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NS_IMETHOD SetViewVisibility(nsIView *aView, nsViewVisibility aVisible);
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NS_IMETHOD SetViewZIndex(nsIView *aView, bool aAuto, int32_t aZIndex, bool aTopMost=false);
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virtual void SetPresShell(nsIPresShell *aPresShell) { mPresShell = aPresShell; }
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virtual nsIPresShell* GetPresShell() { return mPresShell; }
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NS_IMETHOD GetDeviceContext(nsDeviceContext *&aContext);
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virtual nsIViewManager* IncrementDisableRefreshCount();
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virtual void DecrementDisableRefreshCount();
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NS_IMETHOD GetRootWidget(nsIWidget **aWidget);
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NS_IMETHOD IsPainting(bool& aIsPainting);
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NS_IMETHOD GetLastUserEventTime(uint32_t& aTime);
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static uint32_t gLastUserEventTime;
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/* Update the cached RootViewManager pointer on this view manager. */
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void InvalidateHierarchy();
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virtual void ProcessPendingUpdates();
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virtual void UpdateWidgetGeometry();
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protected:
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virtual ~nsViewManager();
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private:
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void FlushPendingInvalidates();
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void ProcessPendingUpdatesForView(nsView *aView,
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bool aFlushDirtyRegion = true);
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void FlushDirtyRegionToWidget(nsView* aView);
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/**
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* Call WillPaint() on all view observers under this vm root.
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*/
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void CallWillPaintOnObservers(bool aWillSendDidPaint);
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void ReparentChildWidgets(nsIView* aView, nsIWidget *aNewWidget);
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void ReparentWidgets(nsIView* aView, nsIView *aParent);
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void InvalidateWidgetArea(nsView *aWidgetView, const nsRegion &aDamagedRegion);
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void InvalidateViews(nsView *aView);
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// aView is the view for aWidget and aRegion is relative to aWidget.
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void Refresh(nsView *aView, const nsIntRegion& aRegion, bool aWillSendDidPaint);
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void InvalidateRectDifference(nsView *aView, const nsRect& aRect, const nsRect& aCutOut);
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void InvalidateHorizontalBandDifference(nsView *aView, const nsRect& aRect, const nsRect& aCutOut,
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nscoord aY1, nscoord aY2, bool aInCutOut);
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// Utilities
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bool IsViewInserted(nsView *aView);
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/**
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* Intersects aRect with aView's bounds and then transforms it from aView's
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* coordinate system to the coordinate system of the widget attached to
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* aView.
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*/
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nsIntRect ViewToWidget(nsView *aView, const nsRect &aRect) const;
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void DoSetWindowDimensions(nscoord aWidth, nscoord aHeight);
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bool IsPainting() const {
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return RootViewManager()->mPainting;
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}
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void SetPainting(bool aPainting) {
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RootViewManager()->mPainting = aPainting;
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}
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nsresult InvalidateView(nsIView *aView, const nsRect &aRect);
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public: // NOT in nsIViewManager, so private to the view module
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nsView* GetRootViewImpl() const { return mRootView; }
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nsViewManager* RootViewManager() const { return mRootViewManager; }
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bool IsRootVM() const { return this == RootViewManager(); }
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// Whether synchronous painting is allowed at the moment. For example,
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// widget geometry changes can cause synchronous painting, so they need to
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// be deferred while refresh is disabled.
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bool IsPaintingAllowed() { return RootViewManager()->mRefreshDisableCount == 0; }
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void WillPaintWindow(nsIWidget* aWidget, bool aWillSendDidPaint);
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bool PaintWindow(nsIWidget* aWidget, nsIntRegion aRegion,
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uint32_t aFlags);
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void DidPaintWindow();
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// Call this when you need to let the viewmanager know that it now has
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// pending updates.
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void PostPendingUpdate();
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uint32_t AppUnitsPerDevPixel() const
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{
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return mContext->AppUnitsPerDevPixel();
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}
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private:
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nsRefPtr<nsDeviceContext> mContext;
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nsIPresShell *mPresShell;
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// The size for a resize that we delayed until the root view becomes
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// visible again.
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nsSize mDelayedResize;
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nsView *mRootView;
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// mRootViewManager is a strong ref unless it equals |this|. It's
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// never null (if we have no ancestors, it will be |this|).
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nsViewManager *mRootViewManager;
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// The following members should not be accessed directly except by
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// the root view manager. Some have accessor functions to enforce
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// this, as noted.
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int32_t mRefreshDisableCount;
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// Use IsPainting() and SetPainting() to access mPainting.
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bool mPainting;
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bool mRecursiveRefreshPending;
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bool mHasPendingWidgetGeometryChanges;
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bool mInScroll;
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//from here to public should be static and locked... MMP
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static int32_t mVMCount; //number of viewmanagers
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//list of view managers
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static nsVoidArray *gViewManagers;
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};
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#endif /* nsViewManager_h___ */
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