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-rw-r--r--view/nsView.cpp1127
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diff --git a/view/nsView.cpp b/view/nsView.cpp
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+++ b/view/nsView.cpp
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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/. */
+
+#include "nsView.h"
+
+#include "mozilla/Attributes.h"
+#include "mozilla/BasicEvents.h"
+#include "mozilla/DebugOnly.h"
+#include "mozilla/IntegerPrintfMacros.h"
+#include "mozilla/Likely.h"
+#include "mozilla/Poison.h"
+#include "nsIWidget.h"
+#include "nsViewManager.h"
+#include "nsIFrame.h"
+#include "nsPresArena.h"
+#include "nsXULPopupManager.h"
+#include "nsIWidgetListener.h"
+#include "nsContentUtils.h" // for nsAutoScriptBlocker
+#include "mozilla/TimelineConsumers.h"
+#include "mozilla/CompositeTimelineMarker.h"
+
+using namespace mozilla;
+
+nsView::nsView(nsViewManager* aViewManager, nsViewVisibility aVisibility)
+{
+ MOZ_COUNT_CTOR(nsView);
+
+ mVis = aVisibility;
+ // Views should be transparent by default. Not being transparent is
+ // a promise that the view will paint all its pixels opaquely. Views
+ // should make this promise explicitly by calling
+ // SetViewContentTransparency.
+ mVFlags = 0;
+ mViewManager = aViewManager;
+ mDirtyRegion = nullptr;
+ mWidgetIsTopLevel = false;
+}
+
+void nsView::DropMouseGrabbing()
+{
+ nsIPresShell* presShell = mViewManager->GetPresShell();
+ if (presShell)
+ presShell->ClearMouseCaptureOnView(this);
+}
+
+nsView::~nsView()
+{
+ MOZ_COUNT_DTOR(nsView);
+
+ while (GetFirstChild())
+ {
+ nsView* child = GetFirstChild();
+ if (child->GetViewManager() == mViewManager) {
+ child->Destroy();
+ } else {
+ // just unhook it. Someone else will want to destroy this.
+ RemoveChild(child);
+ }
+ }
+
+ if (mViewManager)
+ {
+ DropMouseGrabbing();
+
+ nsView *rootView = mViewManager->GetRootView();
+
+ if (rootView)
+ {
+ // Root views can have parents!
+ if (mParent)
+ {
+ mViewManager->RemoveChild(this);
+ }
+
+ if (rootView == this)
+ {
+ // Inform the view manager that the root view has gone away...
+ mViewManager->SetRootView(nullptr);
+ }
+ }
+ else if (mParent)
+ {
+ mParent->RemoveChild(this);
+ }
+
+ mViewManager = nullptr;
+ }
+ else if (mParent)
+ {
+ mParent->RemoveChild(this);
+ }
+
+ if (mPreviousWindow) {
+ mPreviousWindow->SetPreviouslyAttachedWidgetListener(nullptr);
+ }
+
+ // Destroy and release the widget
+ DestroyWidget();
+
+ delete mDirtyRegion;
+}
+
+class DestroyWidgetRunnable : public Runnable {
+public:
+ NS_DECL_NSIRUNNABLE
+
+ explicit DestroyWidgetRunnable(nsIWidget* aWidget) : mWidget(aWidget) {}
+
+private:
+ nsCOMPtr<nsIWidget> mWidget;
+};
+
+NS_IMETHODIMP DestroyWidgetRunnable::Run()
+{
+ mWidget->Destroy();
+ mWidget = nullptr;
+ return NS_OK;
+}
+
+
+void nsView::DestroyWidget()
+{
+ if (mWindow)
+ {
+ // If we are not attached to a base window, we're going to tear down our
+ // widget here. However, if we're attached to somebody elses widget, we
+ // want to leave the widget alone: don't reset the client data or call
+ // Destroy. Just clear our event view ptr and free our reference to it.
+ if (mWidgetIsTopLevel) {
+ mWindow->SetAttachedWidgetListener(nullptr);
+ }
+ else {
+ mWindow->SetWidgetListener(nullptr);
+
+ nsCOMPtr<nsIRunnable> widgetDestroyer =
+ new DestroyWidgetRunnable(mWindow);
+
+ // Don't leak if we happen to arrive here after the main thread
+ // has disappeared.
+ nsCOMPtr<nsIThread> mainThread = do_GetMainThread();
+ if (mainThread) {
+ mainThread->Dispatch(widgetDestroyer.forget(), NS_DISPATCH_NORMAL);
+ }
+ }
+
+ mWindow = nullptr;
+ }
+}
+
+nsView* nsView::GetViewFor(nsIWidget* aWidget)
+{
+ NS_PRECONDITION(nullptr != aWidget, "null widget ptr");
+
+ nsIWidgetListener* listener = aWidget->GetWidgetListener();
+ if (listener) {
+ nsView* view = listener->GetView();
+ if (view)
+ return view;
+ }
+
+ listener = aWidget->GetAttachedWidgetListener();
+ return listener ? listener->GetView() : nullptr;
+}
+
+void nsView::Destroy()
+{
+ this->~nsView();
+ mozWritePoison(this, sizeof(*this));
+ nsView::operator delete(this);
+}
+
+void nsView::SetPosition(nscoord aX, nscoord aY)
+{
+ mDimBounds.x += aX - mPosX;
+ mDimBounds.y += aY - mPosY;
+ mPosX = aX;
+ mPosY = aY;
+
+ NS_ASSERTION(GetParent() || (aX == 0 && aY == 0),
+ "Don't try to move the root widget to something non-zero");
+
+ ResetWidgetBounds(true, false);
+}
+
+void nsView::ResetWidgetBounds(bool aRecurse, bool aForceSync)
+{
+ if (mWindow) {
+ if (!aForceSync) {
+ // Don't change widget geometry synchronously, since that can
+ // cause synchronous painting.
+ mViewManager->PostPendingUpdate();
+ } else {
+ DoResetWidgetBounds(false, true);
+ }
+ return;
+ }
+
+ if (aRecurse) {
+ // reposition any widgets under this view
+ for (nsView* v = GetFirstChild(); v; v = v->GetNextSibling()) {
+ v->ResetWidgetBounds(true, aForceSync);
+ }
+ }
+}
+
+bool nsView::IsEffectivelyVisible()
+{
+ for (nsView* v = this; v; v = v->mParent) {
+ if (v->GetVisibility() == nsViewVisibility_kHide)
+ return false;
+ }
+ return true;
+}
+
+LayoutDeviceIntRect nsView::CalcWidgetBounds(nsWindowType aType)
+{
+ int32_t p2a = mViewManager->AppUnitsPerDevPixel();
+
+ nsRect viewBounds(mDimBounds);
+
+ nsView* parent = GetParent();
+ nsIWidget* parentWidget = nullptr;
+ if (parent) {
+ nsPoint offset;
+ parentWidget = parent->GetNearestWidget(&offset, p2a);
+ // make viewBounds be relative to the parent widget, in appunits
+ viewBounds += offset;
+
+ if (parentWidget && aType == eWindowType_popup &&
+ IsEffectivelyVisible()) {
+ // put offset into screen coordinates. (based on client area origin)
+ LayoutDeviceIntPoint screenPoint = parentWidget->WidgetToScreenOffset();
+ viewBounds += nsPoint(NSIntPixelsToAppUnits(screenPoint.x, p2a),
+ NSIntPixelsToAppUnits(screenPoint.y, p2a));
+ }
+ }
+
+ // Compute widget bounds in device pixels
+ LayoutDeviceIntRect newBounds =
+ LayoutDeviceIntRect::FromUnknownRect(viewBounds.ToNearestPixels(p2a));
+
+#if defined(XP_MACOSX) || (MOZ_WIDGET_GTK == 3)
+ // cocoa and GTK round widget coordinates to the nearest global "display
+ // pixel" integer value. So we avoid fractional display pixel values by
+ // rounding to the nearest value that won't yield a fractional display pixel.
+ nsIWidget* widget = parentWidget ? parentWidget : mWindow.get();
+ uint32_t round;
+ if (aType == eWindowType_popup && widget &&
+ ((round = widget->RoundsWidgetCoordinatesTo()) > 1)) {
+ LayoutDeviceIntSize pixelRoundedSize = newBounds.Size();
+ // round the top left and bottom right to the nearest round pixel
+ newBounds.x = NSToIntRoundUp(NSAppUnitsToDoublePixels(viewBounds.x, p2a) / round) * round;
+ newBounds.y = NSToIntRoundUp(NSAppUnitsToDoublePixels(viewBounds.y, p2a) / round) * round;
+ newBounds.width =
+ NSToIntRoundUp(NSAppUnitsToDoublePixels(viewBounds.XMost(), p2a) / round) * round - newBounds.x;
+ newBounds.height =
+ NSToIntRoundUp(NSAppUnitsToDoublePixels(viewBounds.YMost(), p2a) / round) * round - newBounds.y;
+ // but if that makes the widget larger then our frame may not paint the
+ // extra pixels, so reduce the size to the nearest round value
+ if (newBounds.width > pixelRoundedSize.width) {
+ newBounds.width -= round;
+ }
+ if (newBounds.height > pixelRoundedSize.height) {
+ newBounds.height -= round;
+ }
+ }
+#endif
+
+ // Compute where the top-left of our widget ended up relative to the parent
+ // widget, in appunits.
+ nsPoint roundedOffset(NSIntPixelsToAppUnits(newBounds.x, p2a),
+ NSIntPixelsToAppUnits(newBounds.y, p2a));
+
+ // mViewToWidgetOffset is added to coordinates relative to the view origin
+ // to get coordinates relative to the widget.
+ // The view origin, relative to the parent widget, is at
+ // (mPosX,mPosY) - mDimBounds.TopLeft() + viewBounds.TopLeft().
+ // Our widget, relative to the parent widget, is roundedOffset.
+ mViewToWidgetOffset = nsPoint(mPosX, mPosY)
+ - mDimBounds.TopLeft() + viewBounds.TopLeft() - roundedOffset;
+
+ return newBounds;
+}
+
+void nsView::DoResetWidgetBounds(bool aMoveOnly,
+ bool aInvalidateChangedSize) {
+ // The geometry of a root view's widget is controlled externally,
+ // NOT by sizing or positioning the view
+ if (mViewManager->GetRootView() == this) {
+ return;
+ }
+
+ NS_PRECONDITION(mWindow, "Why was this called??");
+
+ // Hold this ref to make sure it stays alive.
+ nsCOMPtr<nsIWidget> widget = mWindow;
+
+ // Stash a copy of these and use them so we can handle this being deleted (say
+ // from sync painting/flushing from Show/Move/Resize on the widget).
+ LayoutDeviceIntRect newBounds;
+ RefPtr<nsDeviceContext> dx = mViewManager->GetDeviceContext();
+
+ nsWindowType type = widget->WindowType();
+
+ LayoutDeviceIntRect curBounds = widget->GetClientBounds();
+ bool invisiblePopup = type == eWindowType_popup &&
+ ((curBounds.IsEmpty() && mDimBounds.IsEmpty()) ||
+ mVis == nsViewVisibility_kHide);
+
+ if (invisiblePopup) {
+ // We're going to hit the early exit below, avoid calling CalcWidgetBounds.
+ } else {
+ newBounds = CalcWidgetBounds(type);
+ }
+
+ bool curVisibility = widget->IsVisible();
+ bool newVisibility = IsEffectivelyVisible();
+ if (curVisibility && !newVisibility) {
+ widget->Show(false);
+ }
+
+ if (invisiblePopup) {
+ // Don't manipulate empty or hidden popup widgets. For example there's no
+ // point moving hidden comboboxes around, or doing X server roundtrips
+ // to compute their true screen position. This could mean that WidgetToScreen
+ // operations on these widgets don't return up-to-date values, but popup
+ // positions aren't reliable anyway because of correction to be on or off-screen.
+ return;
+ }
+
+ bool changedPos = curBounds.TopLeft() != newBounds.TopLeft();
+ bool changedSize = curBounds.Size() != newBounds.Size();
+
+ // Child views are never attached to top level widgets, this is safe.
+
+ // Coordinates are converted to desktop pixels for window Move/Resize APIs,
+ // because of the potential for device-pixel coordinate spaces for mixed
+ // hidpi/lodpi screens to overlap each other and result in bad placement
+ // (bug 814434).
+ DesktopToLayoutDeviceScale scale = dx->GetDesktopToDeviceScale();
+
+ DesktopRect deskRect = newBounds / scale;
+ if (changedPos) {
+ if (changedSize && !aMoveOnly) {
+ widget->ResizeClient(deskRect.x, deskRect.y,
+ deskRect.width, deskRect.height,
+ aInvalidateChangedSize);
+ } else {
+ widget->MoveClient(deskRect.x, deskRect.y);
+ }
+ } else {
+ if (changedSize && !aMoveOnly) {
+ widget->ResizeClient(deskRect.width, deskRect.height,
+ aInvalidateChangedSize);
+ } // else do nothing!
+ }
+
+ if (!curVisibility && newVisibility) {
+ widget->Show(true);
+ }
+}
+
+void nsView::SetDimensions(const nsRect& aRect, bool aPaint, bool aResizeWidget)
+{
+ nsRect dims = aRect;
+ dims.MoveBy(mPosX, mPosY);
+
+ // Don't use nsRect's operator== here, since it returns true when
+ // both rects are empty even if they have different widths and we
+ // have cases where that sort of thing matters to us.
+ if (mDimBounds.TopLeft() == dims.TopLeft() &&
+ mDimBounds.Size() == dims.Size()) {
+ return;
+ }
+
+ mDimBounds = dims;
+
+ if (aResizeWidget) {
+ ResetWidgetBounds(false, false);
+ }
+}
+
+void nsView::NotifyEffectiveVisibilityChanged(bool aEffectivelyVisible)
+{
+ if (!aEffectivelyVisible)
+ {
+ DropMouseGrabbing();
+ }
+
+ SetForcedRepaint(true);
+
+ if (nullptr != mWindow)
+ {
+ ResetWidgetBounds(false, false);
+ }
+
+ for (nsView* child = mFirstChild; child; child = child->mNextSibling) {
+ if (child->mVis == nsViewVisibility_kHide) {
+ // It was effectively hidden and still is
+ continue;
+ }
+ // Our child is visible if we are
+ child->NotifyEffectiveVisibilityChanged(aEffectivelyVisible);
+ }
+}
+
+void nsView::SetVisibility(nsViewVisibility aVisibility)
+{
+ mVis = aVisibility;
+ NotifyEffectiveVisibilityChanged(IsEffectivelyVisible());
+}
+
+void nsView::SetFloating(bool aFloatingView)
+{
+ if (aFloatingView)
+ mVFlags |= NS_VIEW_FLAG_FLOATING;
+ else
+ mVFlags &= ~NS_VIEW_FLAG_FLOATING;
+}
+
+void nsView::InvalidateHierarchy()
+{
+ if (mViewManager->GetRootView() == this)
+ mViewManager->InvalidateHierarchy();
+
+ for (nsView *child = mFirstChild; child; child = child->GetNextSibling())
+ child->InvalidateHierarchy();
+}
+
+void nsView::InsertChild(nsView *aChild, nsView *aSibling)
+{
+ NS_PRECONDITION(nullptr != aChild, "null ptr");
+
+ if (nullptr != aChild)
+ {
+ if (nullptr != aSibling)
+ {
+#ifdef DEBUG
+ NS_ASSERTION(aSibling->GetParent() == this, "tried to insert view with invalid sibling");
+#endif
+ //insert after sibling
+ aChild->SetNextSibling(aSibling->GetNextSibling());
+ aSibling->SetNextSibling(aChild);
+ }
+ else
+ {
+ aChild->SetNextSibling(mFirstChild);
+ mFirstChild = aChild;
+ }
+ aChild->SetParent(this);
+
+ // If we just inserted a root view, then update the RootViewManager
+ // on all view managers in the new subtree.
+
+ nsViewManager *vm = aChild->GetViewManager();
+ if (vm->GetRootView() == aChild)
+ {
+ aChild->InvalidateHierarchy();
+ }
+ }
+}
+
+void nsView::RemoveChild(nsView *child)
+{
+ NS_PRECONDITION(nullptr != child, "null ptr");
+
+ if (nullptr != child)
+ {
+ nsView* prevKid = nullptr;
+ nsView* kid = mFirstChild;
+ DebugOnly<bool> found = false;
+ while (nullptr != kid) {
+ if (kid == child) {
+ if (nullptr != prevKid) {
+ prevKid->SetNextSibling(kid->GetNextSibling());
+ } else {
+ mFirstChild = kid->GetNextSibling();
+ }
+ child->SetParent(nullptr);
+ found = true;
+ break;
+ }
+ prevKid = kid;
+ kid = kid->GetNextSibling();
+ }
+ NS_ASSERTION(found, "tried to remove non child");
+
+ // If we just removed a root view, then update the RootViewManager
+ // on all view managers in the removed subtree.
+
+ nsViewManager *vm = child->GetViewManager();
+ if (vm->GetRootView() == child)
+ {
+ child->InvalidateHierarchy();
+ }
+ }
+}
+
+// Native widgets ultimately just can't deal with the awesome power of
+// CSS2 z-index. However, we set the z-index on the widget anyway
+// because in many simple common cases the widgets do end up in the
+// right order. We set each widget's z-index to the z-index of the
+// nearest ancestor that has non-auto z-index.
+static void UpdateNativeWidgetZIndexes(nsView* aView, int32_t aZIndex)
+{
+ if (aView->HasWidget()) {
+ nsIWidget* widget = aView->GetWidget();
+ if (widget->GetZIndex() != aZIndex) {
+ widget->SetZIndex(aZIndex);
+ }
+ } else {
+ for (nsView* v = aView->GetFirstChild(); v; v = v->GetNextSibling()) {
+ if (v->GetZIndexIsAuto()) {
+ UpdateNativeWidgetZIndexes(v, aZIndex);
+ }
+ }
+ }
+}
+
+static int32_t FindNonAutoZIndex(nsView* aView)
+{
+ while (aView) {
+ if (!aView->GetZIndexIsAuto()) {
+ return aView->GetZIndex();
+ }
+ aView = aView->GetParent();
+ }
+ return 0;
+}
+
+struct DefaultWidgetInitData : public nsWidgetInitData {
+ DefaultWidgetInitData() : nsWidgetInitData()
+ {
+ mWindowType = eWindowType_child;
+ clipChildren = true;
+ clipSiblings = true;
+ }
+};
+
+nsresult nsView::CreateWidget(nsWidgetInitData *aWidgetInitData,
+ bool aEnableDragDrop,
+ bool aResetVisibility)
+{
+ AssertNoWindow();
+ MOZ_ASSERT(!aWidgetInitData ||
+ aWidgetInitData->mWindowType != eWindowType_popup,
+ "Use CreateWidgetForPopup");
+
+ DefaultWidgetInitData defaultInitData;
+ bool initDataPassedIn = !!aWidgetInitData;
+ aWidgetInitData = aWidgetInitData ? aWidgetInitData : &defaultInitData;
+ defaultInitData.mListenForResizes =
+ (!initDataPassedIn && GetParent() &&
+ GetParent()->GetViewManager() != mViewManager);
+
+ LayoutDeviceIntRect trect = CalcWidgetBounds(aWidgetInitData->mWindowType);
+
+ nsIWidget* parentWidget =
+ GetParent() ? GetParent()->GetNearestWidget(nullptr) : nullptr;
+ if (!parentWidget) {
+ NS_ERROR("nsView::CreateWidget without suitable parent widget??");
+ return NS_ERROR_FAILURE;
+ }
+
+ // XXX: using aForceUseIWidgetParent=true to preserve previous
+ // semantics. It's not clear that it's actually needed.
+ mWindow = parentWidget->CreateChild(trect, aWidgetInitData, true);
+ if (!mWindow) {
+ return NS_ERROR_FAILURE;
+ }
+
+ InitializeWindow(aEnableDragDrop, aResetVisibility);
+
+ return NS_OK;
+}
+
+nsresult nsView::CreateWidgetForParent(nsIWidget* aParentWidget,
+ nsWidgetInitData *aWidgetInitData,
+ bool aEnableDragDrop,
+ bool aResetVisibility)
+{
+ AssertNoWindow();
+ MOZ_ASSERT(!aWidgetInitData ||
+ aWidgetInitData->mWindowType != eWindowType_popup,
+ "Use CreateWidgetForPopup");
+ MOZ_ASSERT(aParentWidget, "Parent widget required");
+
+ DefaultWidgetInitData defaultInitData;
+ aWidgetInitData = aWidgetInitData ? aWidgetInitData : &defaultInitData;
+
+ LayoutDeviceIntRect trect = CalcWidgetBounds(aWidgetInitData->mWindowType);
+
+ mWindow = aParentWidget->CreateChild(trect, aWidgetInitData);
+ if (!mWindow) {
+ return NS_ERROR_FAILURE;
+ }
+
+ InitializeWindow(aEnableDragDrop, aResetVisibility);
+
+ return NS_OK;
+}
+
+nsresult nsView::CreateWidgetForPopup(nsWidgetInitData *aWidgetInitData,
+ nsIWidget* aParentWidget,
+ bool aEnableDragDrop,
+ bool aResetVisibility)
+{
+ AssertNoWindow();
+ MOZ_ASSERT(aWidgetInitData, "Widget init data required");
+ MOZ_ASSERT(aWidgetInitData->mWindowType == eWindowType_popup,
+ "Use one of the other CreateWidget methods");
+
+ LayoutDeviceIntRect trect = CalcWidgetBounds(aWidgetInitData->mWindowType);
+
+ // XXX/cjones: having these two separate creation cases seems ... um
+ // ... unnecessary, but it's the way the old code did it. Please
+ // unify them by first finding a suitable parent nsIWidget, then
+ // getting rid of aForceUseIWidgetParent.
+ if (aParentWidget) {
+ // XXX: using aForceUseIWidgetParent=true to preserve previous
+ // semantics. It's not clear that it's actually needed.
+ mWindow = aParentWidget->CreateChild(trect, aWidgetInitData, true);
+ }
+ else {
+ nsIWidget* nearestParent = GetParent() ? GetParent()->GetNearestWidget(nullptr)
+ : nullptr;
+ if (!nearestParent) {
+ // Without a parent, we can't make a popup. This can happen
+ // when printing
+ return NS_ERROR_FAILURE;
+ }
+
+ mWindow = nearestParent->CreateChild(trect, aWidgetInitData);
+ }
+ if (!mWindow) {
+ return NS_ERROR_FAILURE;
+ }
+
+ InitializeWindow(aEnableDragDrop, aResetVisibility);
+
+ return NS_OK;
+}
+
+void
+nsView::InitializeWindow(bool aEnableDragDrop, bool aResetVisibility)
+{
+ MOZ_ASSERT(mWindow, "Must have a window to initialize");
+
+ mWindow->SetWidgetListener(this);
+
+ if (aEnableDragDrop) {
+ mWindow->EnableDragDrop(true);
+ }
+
+ // propagate the z-index to the widget.
+ UpdateNativeWidgetZIndexes(this, FindNonAutoZIndex(this));
+
+ //make sure visibility state is accurate
+
+ if (aResetVisibility) {
+ SetVisibility(GetVisibility());
+ }
+}
+
+void
+nsView::SetNeedsWindowPropertiesSync()
+{
+ mNeedsWindowPropertiesSync = true;
+ if (mViewManager) {
+ mViewManager->PostPendingUpdate();
+ }
+}
+
+
+// Attach to a top level widget and start receiving mirrored events.
+nsresult nsView::AttachToTopLevelWidget(nsIWidget* aWidget)
+{
+ NS_PRECONDITION(nullptr != aWidget, "null widget ptr");
+ /// XXXjimm This is a temporary workaround to an issue w/document
+ // viewer (bug 513162).
+ nsIWidgetListener* listener = aWidget->GetAttachedWidgetListener();
+ if (listener) {
+ nsView *oldView = listener->GetView();
+ if (oldView) {
+ oldView->DetachFromTopLevelWidget();
+ }
+ }
+
+ // Note, the previous device context will be released. Detaching
+ // will not restore the old one.
+ aWidget->AttachViewToTopLevel(!nsIWidget::UsePuppetWidgets());
+
+ mWindow = aWidget;
+
+ mWindow->SetAttachedWidgetListener(this);
+ mWindow->EnableDragDrop(true);
+ mWidgetIsTopLevel = true;
+
+ // Refresh the view bounds
+ CalcWidgetBounds(mWindow->WindowType());
+
+ return NS_OK;
+}
+
+// Detach this view from an attached widget.
+nsresult nsView::DetachFromTopLevelWidget()
+{
+ NS_PRECONDITION(mWidgetIsTopLevel, "Not attached currently!");
+ NS_PRECONDITION(mWindow, "null mWindow for DetachFromTopLevelWidget!");
+
+ mWindow->SetAttachedWidgetListener(nullptr);
+ nsIWidgetListener* listener = mWindow->GetPreviouslyAttachedWidgetListener();
+
+ if (listener && listener->GetView()) {
+ // Ensure the listener doesn't think it's being used anymore
+ listener->GetView()->SetPreviousWidget(nullptr);
+ }
+
+ // If the new view's frame is paint suppressed then the window
+ // will want to use us instead until that's done
+ mWindow->SetPreviouslyAttachedWidgetListener(this);
+
+ mPreviousWindow = mWindow;
+ mWindow = nullptr;
+
+ mWidgetIsTopLevel = false;
+
+ return NS_OK;
+}
+
+void nsView::SetZIndex(bool aAuto, int32_t aZIndex)
+{
+ bool oldIsAuto = GetZIndexIsAuto();
+ mVFlags = (mVFlags & ~NS_VIEW_FLAG_AUTO_ZINDEX) | (aAuto ? NS_VIEW_FLAG_AUTO_ZINDEX : 0);
+ mZIndex = aZIndex;
+
+ if (HasWidget() || !oldIsAuto || !aAuto) {
+ UpdateNativeWidgetZIndexes(this, FindNonAutoZIndex(this));
+ }
+}
+
+void nsView::AssertNoWindow()
+{
+ // XXX: it would be nice to make this a strong assert
+ if (MOZ_UNLIKELY(mWindow)) {
+ NS_ERROR("We already have a window for this view? BAD");
+ mWindow->SetWidgetListener(nullptr);
+ mWindow->Destroy();
+ mWindow = nullptr;
+ }
+}
+
+//
+// internal window creation functions
+//
+void nsView::AttachWidgetEventHandler(nsIWidget* aWidget)
+{
+#ifdef DEBUG
+ NS_ASSERTION(!aWidget->GetWidgetListener(), "Already have a widget listener");
+#endif
+
+ aWidget->SetWidgetListener(this);
+}
+
+void nsView::DetachWidgetEventHandler(nsIWidget* aWidget)
+{
+ NS_ASSERTION(!aWidget->GetWidgetListener() ||
+ aWidget->GetWidgetListener()->GetView() == this, "Wrong view");
+ aWidget->SetWidgetListener(nullptr);
+}
+
+#ifdef DEBUG
+void nsView::List(FILE* out, int32_t aIndent) const
+{
+ int32_t i;
+ for (i = aIndent; --i >= 0; ) fputs(" ", out);
+ fprintf(out, "%p ", (void*)this);
+ if (nullptr != mWindow) {
+ nscoord p2a = mViewManager->AppUnitsPerDevPixel();
+ LayoutDeviceIntRect rect = mWindow->GetClientBounds();
+ nsRect windowBounds = LayoutDeviceIntRect::ToAppUnits(rect, p2a);
+ rect = mWindow->GetBounds();
+ nsRect nonclientBounds = LayoutDeviceIntRect::ToAppUnits(rect, p2a);
+ nsrefcnt widgetRefCnt = mWindow.get()->AddRef() - 1;
+ mWindow.get()->Release();
+ int32_t Z = mWindow->GetZIndex();
+ fprintf(out, "(widget=%p[%" PRIuPTR "] z=%d pos={%d,%d,%d,%d}) ",
+ (void*)mWindow, widgetRefCnt, Z,
+ nonclientBounds.x, nonclientBounds.y,
+ windowBounds.width, windowBounds.height);
+ }
+ nsRect brect = GetBounds();
+ fprintf(out, "{%d,%d,%d,%d}",
+ brect.x, brect.y, brect.width, brect.height);
+ fprintf(out, " z=%d vis=%d frame=%p <\n",
+ mZIndex, mVis, static_cast<void*>(mFrame));
+ for (nsView* kid = mFirstChild; kid; kid = kid->GetNextSibling()) {
+ NS_ASSERTION(kid->GetParent() == this, "incorrect parent");
+ kid->List(out, aIndent + 1);
+ }
+ for (i = aIndent; --i >= 0; ) fputs(" ", out);
+ fputs(">\n", out);
+}
+#endif // DEBUG
+
+nsPoint nsView::GetOffsetTo(const nsView* aOther) const
+{
+ return GetOffsetTo(aOther, GetViewManager()->AppUnitsPerDevPixel());
+}
+
+nsPoint nsView::GetOffsetTo(const nsView* aOther, const int32_t aAPD) const
+{
+ MOZ_ASSERT(GetParent() || !aOther || aOther->GetParent() || this == aOther,
+ "caller of (outer) GetOffsetTo must not pass unrelated views");
+ // We accumulate the final result in offset
+ nsPoint offset(0, 0);
+ // The offset currently accumulated at the current APD
+ nsPoint docOffset(0, 0);
+ const nsView* v = this;
+ nsViewManager* currVM = v->GetViewManager();
+ int32_t currAPD = currVM->AppUnitsPerDevPixel();
+ const nsView* root = nullptr;
+ for ( ; v != aOther && v; root = v, v = v->GetParent()) {
+ nsViewManager* newVM = v->GetViewManager();
+ if (newVM != currVM) {
+ int32_t newAPD = newVM->AppUnitsPerDevPixel();
+ if (newAPD != currAPD) {
+ offset += docOffset.ScaleToOtherAppUnits(currAPD, aAPD);
+ docOffset.x = docOffset.y = 0;
+ currAPD = newAPD;
+ }
+ currVM = newVM;
+ }
+ docOffset += v->GetPosition();
+ }
+ offset += docOffset.ScaleToOtherAppUnits(currAPD, aAPD);
+
+ if (v != aOther) {
+ // Looks like aOther wasn't an ancestor of |this|. So now we have
+ // the root-VM-relative position of |this| in |offset|. Get the
+ // root-VM-relative position of aOther and subtract it.
+ nsPoint negOffset = aOther->GetOffsetTo(root, aAPD);
+ offset -= negOffset;
+ }
+
+ return offset;
+}
+
+nsPoint nsView::GetOffsetToWidget(nsIWidget* aWidget) const
+{
+ nsPoint pt;
+ // Get the view for widget
+ nsView* widgetView = GetViewFor(aWidget);
+ if (!widgetView) {
+ return pt;
+ }
+
+ // Get the offset to the widget view in the widget view's APD
+ // We get the offset in the widget view's APD first and then convert to our
+ // APD afterwards so that we can include the widget view's ViewToWidgetOffset
+ // in the sum in its native APD, and then convert the whole thing to our APD
+ // so that we don't have to convert the APD of the relatively small
+ // ViewToWidgetOffset by itself with a potentially large relative rounding
+ // error.
+ pt = -widgetView->GetOffsetTo(this);
+ // Add in the offset to the widget.
+ pt += widgetView->ViewToWidgetOffset();
+
+ // Convert to our appunits.
+ int32_t widgetAPD = widgetView->GetViewManager()->AppUnitsPerDevPixel();
+ int32_t ourAPD = GetViewManager()->AppUnitsPerDevPixel();
+ pt = pt.ScaleToOtherAppUnits(widgetAPD, ourAPD);
+ return pt;
+}
+
+nsIWidget* nsView::GetNearestWidget(nsPoint* aOffset) const
+{
+ return GetNearestWidget(aOffset, GetViewManager()->AppUnitsPerDevPixel());
+}
+
+nsIWidget* nsView::GetNearestWidget(nsPoint* aOffset, const int32_t aAPD) const
+{
+ // aOffset is based on the view's position, which ignores any chrome on
+ // attached parent widgets.
+
+ // We accumulate the final result in pt
+ nsPoint pt(0, 0);
+ // The offset currently accumulated at the current APD
+ nsPoint docPt(0,0);
+ const nsView* v = this;
+ nsViewManager* currVM = v->GetViewManager();
+ int32_t currAPD = currVM->AppUnitsPerDevPixel();
+ for ( ; v && !v->HasWidget(); v = v->GetParent()) {
+ nsViewManager* newVM = v->GetViewManager();
+ if (newVM != currVM) {
+ int32_t newAPD = newVM->AppUnitsPerDevPixel();
+ if (newAPD != currAPD) {
+ pt += docPt.ScaleToOtherAppUnits(currAPD, aAPD);
+ docPt.x = docPt.y = 0;
+ currAPD = newAPD;
+ }
+ currVM = newVM;
+ }
+ docPt += v->GetPosition();
+ }
+ if (!v) {
+ if (aOffset) {
+ pt += docPt.ScaleToOtherAppUnits(currAPD, aAPD);
+ *aOffset = pt;
+ }
+ return nullptr;
+ }
+
+ // pt is now the offset from v's origin to this view's origin.
+ // We add the ViewToWidgetOffset to get the offset to the widget.
+ if (aOffset) {
+ docPt += v->ViewToWidgetOffset();
+ pt += docPt.ScaleToOtherAppUnits(currAPD, aAPD);
+ *aOffset = pt;
+ }
+ return v->GetWidget();
+}
+
+bool nsView::IsRoot() const
+{
+ NS_ASSERTION(mViewManager != nullptr," View manager is null in nsView::IsRoot()");
+ return mViewManager->GetRootView() == this;
+}
+
+nsRect
+nsView::GetBoundsInParentUnits() const
+{
+ nsView* parent = GetParent();
+ nsViewManager* VM = GetViewManager();
+ if (this != VM->GetRootView() || !parent) {
+ return mDimBounds;
+ }
+ int32_t ourAPD = VM->AppUnitsPerDevPixel();
+ int32_t parentAPD = parent->GetViewManager()->AppUnitsPerDevPixel();
+ return mDimBounds.ScaleToOtherAppUnitsRoundOut(ourAPD, parentAPD);
+}
+
+nsPoint
+nsView::ConvertFromParentCoords(nsPoint aPt) const
+{
+ const nsView* parent = GetParent();
+ if (parent) {
+ aPt = aPt.ScaleToOtherAppUnits(
+ parent->GetViewManager()->AppUnitsPerDevPixel(),
+ GetViewManager()->AppUnitsPerDevPixel());
+ }
+ aPt -= GetPosition();
+ return aPt;
+}
+
+static bool
+IsPopupWidget(nsIWidget* aWidget)
+{
+ return (aWidget->WindowType() == eWindowType_popup);
+}
+
+nsIPresShell*
+nsView::GetPresShell()
+{
+ return GetViewManager()->GetPresShell();
+}
+
+bool
+nsView::WindowMoved(nsIWidget* aWidget, int32_t x, int32_t y)
+{
+ nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
+ if (pm && IsPopupWidget(aWidget)) {
+ pm->PopupMoved(mFrame, nsIntPoint(x, y));
+ return true;
+ }
+
+ return false;
+}
+
+bool
+nsView::WindowResized(nsIWidget* aWidget, int32_t aWidth, int32_t aHeight)
+{
+ // The root view may not be set if this is the resize associated with
+ // window creation
+ SetForcedRepaint(true);
+ if (this == mViewManager->GetRootView()) {
+ RefPtr<nsDeviceContext> devContext = mViewManager->GetDeviceContext();
+ // ensure DPI is up-to-date, in case of window being opened and sized
+ // on a non-default-dpi display (bug 829963)
+ devContext->CheckDPIChange();
+ int32_t p2a = devContext->AppUnitsPerDevPixel();
+ mViewManager->SetWindowDimensions(NSIntPixelsToAppUnits(aWidth, p2a),
+ NSIntPixelsToAppUnits(aHeight, p2a));
+
+ nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
+ if (pm) {
+ nsIPresShell* presShell = mViewManager->GetPresShell();
+ if (presShell && presShell->GetDocument()) {
+ pm->AdjustPopupsOnWindowChange(presShell);
+ }
+ }
+
+ return true;
+ }
+ else if (IsPopupWidget(aWidget)) {
+ nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
+ if (pm) {
+ pm->PopupResized(mFrame, LayoutDeviceIntSize(aWidth, aHeight));
+ return true;
+ }
+ }
+
+ return false;
+}
+
+bool
+nsView::RequestWindowClose(nsIWidget* aWidget)
+{
+ if (mFrame && IsPopupWidget(aWidget) &&
+ mFrame->GetType() == nsGkAtoms::menuPopupFrame) {
+ nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
+ if (pm) {
+ pm->HidePopup(mFrame->GetContent(), false, true, false, false);
+ return true;
+ }
+ }
+
+ return false;
+}
+
+void
+nsView::WillPaintWindow(nsIWidget* aWidget)
+{
+ RefPtr<nsViewManager> vm = mViewManager;
+ vm->WillPaintWindow(aWidget);
+}
+
+bool
+nsView::PaintWindow(nsIWidget* aWidget, LayoutDeviceIntRegion aRegion)
+{
+ NS_ASSERTION(this == nsView::GetViewFor(aWidget), "wrong view for widget?");
+
+ RefPtr<nsViewManager> vm = mViewManager;
+ bool result = vm->PaintWindow(aWidget, aRegion);
+ return result;
+}
+
+void
+nsView::DidPaintWindow()
+{
+ RefPtr<nsViewManager> vm = mViewManager;
+ vm->DidPaintWindow();
+}
+
+void
+nsView::DidCompositeWindow(uint64_t aTransactionId,
+ const TimeStamp& aCompositeStart,
+ const TimeStamp& aCompositeEnd)
+{
+ nsIPresShell* presShell = mViewManager->GetPresShell();
+ if (presShell) {
+ nsAutoScriptBlocker scriptBlocker;
+
+ nsPresContext* context = presShell->GetPresContext();
+ nsRootPresContext* rootContext = context->GetRootPresContext();
+ MOZ_ASSERT(rootContext, "rootContext must be valid.");
+ rootContext->NotifyDidPaintForSubtree(nsIPresShell::PAINT_COMPOSITE, aTransactionId,
+ aCompositeEnd);
+
+ // If the two timestamps are identical, this was likely a fake composite
+ // event which wouldn't be terribly useful to display.
+ if (aCompositeStart == aCompositeEnd) {
+ return;
+ }
+
+ nsIDocShell* docShell = context->GetDocShell();
+ RefPtr<TimelineConsumers> timelines = TimelineConsumers::Get();
+
+ if (timelines && timelines->HasConsumer(docShell)) {
+ timelines->AddMarkerForDocShell(docShell,
+ MakeUnique<CompositeTimelineMarker>(aCompositeStart, MarkerTracingType::START));
+ timelines->AddMarkerForDocShell(docShell,
+ MakeUnique<CompositeTimelineMarker>(aCompositeEnd, MarkerTracingType::END));
+ }
+ }
+}
+
+void
+nsView::RequestRepaint()
+{
+ nsIPresShell* presShell = mViewManager->GetPresShell();
+ if (presShell) {
+ presShell->ScheduleViewManagerFlush();
+ }
+}
+
+nsEventStatus
+nsView::HandleEvent(WidgetGUIEvent* aEvent,
+ bool aUseAttachedEvents)
+{
+ NS_PRECONDITION(nullptr != aEvent->mWidget, "null widget ptr");
+
+ nsEventStatus result = nsEventStatus_eIgnore;
+ nsView* view;
+ if (aUseAttachedEvents) {
+ nsIWidgetListener* listener = aEvent->mWidget->GetAttachedWidgetListener();
+ view = listener ? listener->GetView() : nullptr;
+ }
+ else {
+ view = GetViewFor(aEvent->mWidget);
+ }
+
+ if (view) {
+ RefPtr<nsViewManager> vm = view->GetViewManager();
+ vm->DispatchEvent(aEvent, view, &result);
+ }
+
+ return result;
+}
+
+bool
+nsView::IsPrimaryFramePaintSuppressed()
+{
+ return mFrame ? mFrame->PresContext()->PresShell()->IsPaintingSuppressed() : false;
+}