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Diffstat (limited to 'layout/xul/nsMenuPopupFrame.cpp')
| -rw-r--r-- | layout/xul/nsMenuPopupFrame.cpp | 2477 |
1 files changed, 2477 insertions, 0 deletions
diff --git a/layout/xul/nsMenuPopupFrame.cpp b/layout/xul/nsMenuPopupFrame.cpp new file mode 100644 index 0000000000..b41a666707 --- /dev/null +++ b/layout/xul/nsMenuPopupFrame.cpp @@ -0,0 +1,2477 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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 "nsMenuPopupFrame.h" +#include "LayoutConstants.h" +#include "XULButtonElement.h" +#include "XULPopupElement.h" +#include "mozilla/dom/XULPopupElement.h" +#include "nsGkAtoms.h" +#include "nsIContent.h" +#include "nsIFrameInlines.h" +#include "nsAtom.h" +#include "nsPresContext.h" +#include "mozilla/ComputedStyle.h" +#include "nsCSSRendering.h" +#include "nsNameSpaceManager.h" +#include "nsIFrameInlines.h" +#include "nsViewManager.h" +#include "nsWidgetsCID.h" +#include "nsPIDOMWindow.h" +#include "nsFrameManager.h" +#include "mozilla/dom/Document.h" +#include "nsRect.h" +#include "nsIScrollableFrame.h" +#include "nsIPopupContainer.h" +#include "nsIDocShell.h" +#include "nsReadableUtils.h" +#include "nsUnicharUtils.h" +#include "nsLayoutUtils.h" +#include "nsContentUtils.h" +#include "nsCSSFrameConstructor.h" +#include "nsPIWindowRoot.h" +#include "nsIReflowCallback.h" +#include "nsIDocShellTreeOwner.h" +#include "nsIBaseWindow.h" +#include "nsISound.h" +#include "nsIScreenManager.h" +#include "nsServiceManagerUtils.h" +#include "nsStyleConsts.h" +#include "nsStyleStructInlines.h" +#include "nsTransitionManager.h" +#include "nsDisplayList.h" +#include "nsIDOMXULSelectCntrlEl.h" +#include "mozilla/widget/ScreenManager.h" +#include "mozilla/AnimationUtils.h" +#include "mozilla/BasePrincipal.h" +#include "mozilla/EventDispatcher.h" +#include "mozilla/EventStateManager.h" +#include "mozilla/Preferences.h" +#include "mozilla/LookAndFeel.h" +#include "mozilla/MouseEvents.h" +#include "mozilla/PresShell.h" +#include "mozilla/Services.h" +#include "mozilla/dom/BrowserParent.h" +#include "mozilla/dom/Element.h" +#include "mozilla/dom/Event.h" +#include "mozilla/dom/KeyboardEvent.h" +#include "mozilla/dom/KeyboardEventBinding.h" +#include <algorithm> + +#include "X11UndefineNone.h" +#include "nsXULPopupManager.h" + +using namespace mozilla; +using mozilla::dom::Document; +using mozilla::dom::Element; +using mozilla::dom::Event; +using mozilla::dom::XULButtonElement; + +int8_t nsMenuPopupFrame::sDefaultLevelIsTop = -1; + +TimeStamp nsMenuPopupFrame::sLastKeyTime; + +#ifdef MOZ_WAYLAND +# include "mozilla/WidgetUtilsGtk.h" +# define IS_WAYLAND_DISPLAY() mozilla::widget::GdkIsWaylandDisplay() +extern mozilla::LazyLogModule gWidgetPopupLog; +# define LOG_WAYLAND(...) \ + MOZ_LOG(gWidgetPopupLog, mozilla::LogLevel::Debug, (__VA_ARGS__)) +#else +# define IS_WAYLAND_DISPLAY() false +# define LOG_WAYLAND(...) +#endif + +// NS_NewMenuPopupFrame +// +// Wrapper for creating a new menu popup container +// +nsIFrame* NS_NewMenuPopupFrame(PresShell* aPresShell, ComputedStyle* aStyle) { + return new (aPresShell) + nsMenuPopupFrame(aStyle, aPresShell->GetPresContext()); +} + +NS_IMPL_FRAMEARENA_HELPERS(nsMenuPopupFrame) + +NS_QUERYFRAME_HEAD(nsMenuPopupFrame) + NS_QUERYFRAME_ENTRY(nsMenuPopupFrame) +NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame) + +// +// nsMenuPopupFrame ctor +// +nsMenuPopupFrame::nsMenuPopupFrame(ComputedStyle* aStyle, + nsPresContext* aPresContext) + : nsBlockFrame(aStyle, aPresContext, kClassID) { + // the preference name is backwards here. True means that the 'top' level is + // the default, and false means that the 'parent' level is the default. + if (sDefaultLevelIsTop >= 0) return; + sDefaultLevelIsTop = + Preferences::GetBool("ui.panel.default_level_parent", false); +} // ctor + +nsMenuPopupFrame::~nsMenuPopupFrame() = default; + +static bool IsMouseTransparent(const ComputedStyle& aStyle) { + // If pointer-events: none; is set on the popup, then the widget should + // ignore mouse events, passing them through to the content behind. + return aStyle.PointerEvents() == StylePointerEvents::None; +} + +static nsIWidget::InputRegion ComputeInputRegion(const ComputedStyle& aStyle, + const nsPresContext& aPc) { + return {IsMouseTransparent(aStyle), + (aStyle.StyleUIReset()->mMozWindowInputRegionMargin.ToCSSPixels() * + aPc.CSSToDevPixelScale()) + .Truncated()}; +} + +bool nsMenuPopupFrame::ShouldCreateWidgetUpfront() const { + if (mPopupType != PopupType::Menu) { + // Any panel with a type attribute, such as the autocomplete popup, is + // always generated right away. + return mContent->AsElement()->HasAttr(nsGkAtoms::type); + } + + // Generate the widget up-front if the parent menu is a <menulist> unless its + // sizetopopup is set to "none". + return ShouldExpandToInflowParentOrAnchor(); +} + +void nsMenuPopupFrame::Init(nsIContent* aContent, nsContainerFrame* aParent, + nsIFrame* aPrevInFlow) { + nsBlockFrame::Init(aContent, aParent, aPrevInFlow); + + CreatePopupView(); + + // XXX Hack. The popup's view should float above all other views, + // so we use the nsView::SetFloating() to tell the view manager + // about that constraint. + nsView* ourView = GetView(); + nsViewManager* viewManager = ourView->GetViewManager(); + viewManager->SetViewFloating(ourView, true); + + const auto& el = PopupElement(); + mPopupType = PopupType::Panel; + if (el.IsMenu()) { + mPopupType = PopupType::Menu; + } else if (el.IsXULElement(nsGkAtoms::tooltip)) { + mPopupType = PopupType::Tooltip; + } + + if (PresContext()->IsChrome()) { + mInContentShell = false; + } + + // Support incontentshell=false attribute to allow popups to be displayed + // outside of the content shell. Chrome only. + if (el.NodePrincipal()->IsSystemPrincipal()) { + if (el.GetXULBoolAttr(nsGkAtoms::incontentshell)) { + mInContentShell = true; + } else if (el.AttrValueIs(kNameSpaceID_None, nsGkAtoms::incontentshell, + nsGkAtoms::_false, eCaseMatters)) { + mInContentShell = false; + } + } + + // To improve performance, create the widget for the popup if needed. Popups + // such as menus will create their widgets later when the popup opens. + // + // FIXME(emilio): Doing this up-front for all menupopups causes a bunch of + // assertions, while it's supposed to be just an optimization. + if (!ourView->HasWidget() && ShouldCreateWidgetUpfront()) { + CreateWidgetForView(ourView); + } + + AddStateBits(NS_FRAME_IN_POPUP); +} + +bool nsMenuPopupFrame::HasRemoteContent() const { + return !mInContentShell && mPopupType == PopupType::Panel && + mContent->AsElement()->AttrValueIs(kNameSpaceID_None, + nsGkAtoms::remote, nsGkAtoms::_true, + eIgnoreCase); +} + +bool nsMenuPopupFrame::IsNoAutoHide() const { + // Panels with noautohide="true" don't hide when the mouse is clicked + // outside of them, or when another application is made active. Non-autohide + // panels cannot be used in content windows. + return !mInContentShell && mPopupType == PopupType::Panel && + mContent->AsElement()->AttrValueIs(kNameSpaceID_None, + nsGkAtoms::noautohide, + nsGkAtoms::_true, eIgnoreCase); +} + +widget::PopupLevel nsMenuPopupFrame::GetPopupLevel(bool aIsNoAutoHide) const { + // The popup level is determined as follows, in this order: + // 1. non-panels (menus and tooltips) are always topmost + // 2. any specified level attribute + // 3. if a titlebar attribute is set, use the 'floating' level + // 4. if this is a noautohide panel, use the 'parent' level + // 5. use the platform-specific default level + + // If this is not a panel, this is always a top-most popup. + if (mPopupType != PopupType::Panel) { + return PopupLevel::Top; + } + + // If the level attribute has been set, use that. + static Element::AttrValuesArray strings[] = { + nsGkAtoms::top, nsGkAtoms::parent, nsGkAtoms::floating, nullptr}; + switch (mContent->AsElement()->FindAttrValueIn( + kNameSpaceID_None, nsGkAtoms::level, strings, eCaseMatters)) { + case 0: + return PopupLevel::Top; + case 1: + return PopupLevel::Parent; + case 2: + return PopupLevel::Floating; + } + + // Panels with titlebars most likely want to be floating popups. + if (mContent->AsElement()->HasAttr(nsGkAtoms::titlebar)) { + return PopupLevel::Floating; + } + + // If this panel is a noautohide panel, the default is the parent level. + if (aIsNoAutoHide) { + return PopupLevel::Parent; + } + + // Otherwise, the result depends on the platform. + return sDefaultLevelIsTop ? PopupLevel::Top : PopupLevel::Parent; +} + +void nsMenuPopupFrame::PrepareWidget(bool aRecreate) { + nsView* ourView = GetView(); + if (aRecreate) { + if (auto* widget = GetWidget()) { + // Widget's WebRender resources needs to be cleared before creating new + // widget. + widget->ClearCachedWebrenderResources(); + } + ourView->DestroyWidget(); + } + if (!ourView->HasWidget()) { + CreateWidgetForView(ourView); + } else { + PropagateStyleToWidget(); + } +} + +nsresult nsMenuPopupFrame::CreateWidgetForView(nsView* aView) { + // Create a widget for ourselves. + widget::InitData widgetData; + widgetData.mWindowType = widget::WindowType::Popup; + widgetData.mBorderStyle = widget::BorderStyle::Default; + widgetData.mClipSiblings = true; + widgetData.mPopupHint = mPopupType; + widgetData.mNoAutoHide = IsNoAutoHide(); + + if (!mInContentShell) { + // A drag popup may be used for non-static translucent drag feedback + if (mPopupType == PopupType::Panel && + mContent->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type, + nsGkAtoms::drag, eIgnoreCase)) { + widgetData.mIsDragPopup = true; + } + } + + nsAutoString title; + if (widgetData.mNoAutoHide && + mContent->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::titlebar, + nsGkAtoms::normal, eCaseMatters)) { + widgetData.mBorderStyle = widget::BorderStyle::Title; + + mContent->AsElement()->GetAttr(nsGkAtoms::label, title); + if (mContent->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::close, + nsGkAtoms::_true, eCaseMatters)) { + widgetData.mBorderStyle = + widgetData.mBorderStyle | widget::BorderStyle::Close; + } + } + + bool remote = HasRemoteContent(); + + const auto mode = nsLayoutUtils::GetFrameTransparency(this, this); + widgetData.mHasRemoteContent = remote; + widgetData.mTransparencyMode = mode; + widgetData.mPopupLevel = GetPopupLevel(widgetData.mNoAutoHide); + + // Panels which have a parent level need a parent widget. This allows them to + // always appear in front of the parent window but behind other windows that + // should be in front of it. + nsCOMPtr<nsIWidget> parentWidget; + if (widgetData.mPopupLevel != PopupLevel::Top) { + nsCOMPtr<nsIDocShellTreeItem> dsti = PresContext()->GetDocShell(); + if (!dsti) return NS_ERROR_FAILURE; + + nsCOMPtr<nsIDocShellTreeOwner> treeOwner; + dsti->GetTreeOwner(getter_AddRefs(treeOwner)); + if (!treeOwner) return NS_ERROR_FAILURE; + + nsCOMPtr<nsIBaseWindow> baseWindow(do_QueryInterface(treeOwner)); + if (baseWindow) baseWindow->GetMainWidget(getter_AddRefs(parentWidget)); + } + + nsresult rv = aView->CreateWidgetForPopup(&widgetData, parentWidget); + if (NS_FAILED(rv)) { + return rv; + } + + nsIWidget* widget = aView->GetWidget(); + widget->SetTransparencyMode(mode); + + PropagateStyleToWidget(); + + // most popups don't have a title so avoid setting the title if there isn't + // one + if (!title.IsEmpty()) { + widget->SetTitle(title); + } + + return NS_OK; +} + +void nsMenuPopupFrame::PropagateStyleToWidget(WidgetStyleFlags aFlags) const { + if (aFlags.isEmpty()) { + return; + } + + nsIWidget* widget = GetWidget(); + if (!widget) { + return; + } + + if (aFlags.contains(WidgetStyle::ColorScheme)) { + widget->SetColorScheme(Some(LookAndFeel::ColorSchemeForFrame(this))); + } + if (aFlags.contains(WidgetStyle::InputRegion)) { + widget->SetInputRegion(ComputeInputRegion(*Style(), *PresContext())); + } + if (aFlags.contains(WidgetStyle::Opacity)) { + widget->SetWindowOpacity(StyleUIReset()->mWindowOpacity); + } + if (aFlags.contains(WidgetStyle::Shadow)) { + widget->SetWindowShadowStyle(GetShadowStyle()); + } + if (aFlags.contains(WidgetStyle::Transform)) { + widget->SetWindowTransform(ComputeWidgetTransform()); + } +} + +bool nsMenuPopupFrame::IsMouseTransparent() const { + return ::IsMouseTransparent(*Style()); +} + +WindowShadow nsMenuPopupFrame::GetShadowStyle() const { + StyleWindowShadow shadow = StyleUIReset()->mWindowShadow; + if (shadow != StyleWindowShadow::Auto) { + MOZ_ASSERT(shadow == StyleWindowShadow::None); + return WindowShadow::None; + } + + switch (StyleDisplay()->EffectiveAppearance()) { + case StyleAppearance::Tooltip: + return WindowShadow::Tooltip; + case StyleAppearance::Menupopup: + return WindowShadow::Menu; + default: + return WindowShadow::Panel; + } +} + +void nsMenuPopupFrame::SetPopupState(nsPopupState aState) { + mPopupState = aState; + + // Work around https://gitlab.gnome.org/GNOME/gtk/-/issues/4166 + if (aState == ePopupShown && IS_WAYLAND_DISPLAY()) { + if (nsIWidget* widget = GetWidget()) { + widget->SetInputRegion(ComputeInputRegion(*Style(), *PresContext())); + } + } +} + +// TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230, bug 1535398) +MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHODIMP nsXULPopupShownEvent::Run() { + nsMenuPopupFrame* popup = do_QueryFrame(mPopup->GetPrimaryFrame()); + // Set the state to visible if the popup is still open. + if (popup && popup->IsOpen()) { + popup->SetPopupState(ePopupShown); + } + + if (!mPopup->IsXULElement(nsGkAtoms::tooltip)) { + nsCOMPtr<nsIObserverService> obsService = + mozilla::services::GetObserverService(); + if (obsService) { + obsService->NotifyObservers(mPopup, "popup-shown", nullptr); + } + } + WidgetMouseEvent event(true, eXULPopupShown, nullptr, + WidgetMouseEvent::eReal); + return EventDispatcher::Dispatch(mPopup, mPresContext, &event); +} + +NS_IMETHODIMP nsXULPopupShownEvent::HandleEvent(Event* aEvent) { + nsMenuPopupFrame* popup = do_QueryFrame(mPopup->GetPrimaryFrame()); + // Ignore events not targeted at the popup itself (ie targeted at + // descendants): + if (mPopup != aEvent->GetTarget()) { + return NS_OK; + } + if (popup) { + // ResetPopupShownDispatcher will delete the reference to this, so keep + // another one until Run is finished. + RefPtr<nsXULPopupShownEvent> event = this; + // Only call Run if it the dispatcher was assigned. This avoids calling the + // Run method if the transitionend event fires multiple times. + if (popup->ClearPopupShownDispatcher()) { + return Run(); + } + } + + CancelListener(); + return NS_OK; +} + +void nsXULPopupShownEvent::CancelListener() { + mPopup->RemoveSystemEventListener(u"transitionend"_ns, this, false); +} + +NS_IMPL_ISUPPORTS_INHERITED(nsXULPopupShownEvent, Runnable, + nsIDOMEventListener); + +void nsMenuPopupFrame::DidSetComputedStyle(ComputedStyle* aOldStyle) { + nsBlockFrame::DidSetComputedStyle(aOldStyle); + + if (!aOldStyle) { + return; + } + + WidgetStyleFlags flags; + + if (aOldStyle->StyleUI()->mColorScheme != StyleUI()->mColorScheme) { + flags += WidgetStyle::ColorScheme; + } + + auto& newUI = *StyleUIReset(); + auto& oldUI = *aOldStyle->StyleUIReset(); + if (newUI.mWindowOpacity != oldUI.mWindowOpacity) { + flags += WidgetStyle::Opacity; + } + + if (newUI.mMozWindowTransform != oldUI.mMozWindowTransform) { + flags += WidgetStyle::Transform; + } + + if (newUI.mWindowShadow != oldUI.mWindowShadow) { + flags += WidgetStyle::Shadow; + } + + const auto& pc = *PresContext(); + auto oldRegion = ComputeInputRegion(*aOldStyle, pc); + auto newRegion = ComputeInputRegion(*Style(), pc); + if (oldRegion.mFullyTransparent != newRegion.mFullyTransparent || + oldRegion.mMargin != newRegion.mMargin) { + flags += WidgetStyle::InputRegion; + } + + PropagateStyleToWidget(flags); +} + +void nsMenuPopupFrame::TweakMinPrefISize(nscoord& aSize) { + if (!ShouldExpandToInflowParentOrAnchor()) { + return; + } + // Make sure to accommodate for our scrollbar if needed. Do it only for + // menulists to match previous behavior. + // + // NOTE(emilio): This is somewhat hacky. The "right" fix (which would be + // using scrollbar-gutter: stable on the scroller) isn't great, because even + // though we want a stable gutter, we want to draw on top of the gutter when + // there's no scrollbar, otherwise it looks rather weird. + // + // Automatically accommodating for the scrollbar otherwise would be bug + // 764076, but that has its own set of problems. + if (nsIScrollableFrame* sf = GetScrollFrame()) { + aSize += sf->GetDesiredScrollbarSizes().LeftRight(); + } + + nscoord menuListOrAnchorWidth = 0; + if (nsIFrame* menuList = GetInFlowParent()) { + menuListOrAnchorWidth = menuList->GetRect().width; + } + if (mAnchorType == MenuPopupAnchorType_Rect) { + menuListOrAnchorWidth = std::max(menuListOrAnchorWidth, mScreenRect.width); + } + // Input margin doesn't have contents, so account for it for popup sizing + // purposes. + menuListOrAnchorWidth += + 2 * StyleUIReset()->mMozWindowInputRegionMargin.ToAppUnits(); + aSize = std::max(aSize, menuListOrAnchorWidth); +} + +nscoord nsMenuPopupFrame::GetMinISize(gfxContext* aRC) { + nscoord result; + DISPLAY_PREF_INLINE_SIZE(this, result); + + result = nsBlockFrame::GetMinISize(aRC); + TweakMinPrefISize(result); + return result; +} + +nscoord nsMenuPopupFrame::GetPrefISize(gfxContext* aRC) { + nscoord result; + DISPLAY_PREF_INLINE_SIZE(this, result); + + result = nsBlockFrame::GetPrefISize(aRC); + TweakMinPrefISize(result); + return result; +} + +void nsMenuPopupFrame::Reflow(nsPresContext* aPresContext, + ReflowOutput& aDesiredSize, + const ReflowInput& aReflowInput, + nsReflowStatus& aStatus) { + MarkInReflow(); + DO_GLOBAL_REFLOW_COUNT("nsMenuPopupFrame"); + DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus); + MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!"); + + const auto wm = GetWritingMode(); + // Default to preserving our bounds. + aDesiredSize.SetSize(wm, GetLogicalSize(wm)); + + LayoutPopup(aPresContext, aDesiredSize, aReflowInput, aStatus); + + aDesiredSize.SetBlockStartAscent(aDesiredSize.BSize(wm)); + aDesiredSize.SetOverflowAreasToDesiredBounds(); + FinishAndStoreOverflow(&aDesiredSize, aReflowInput.mStyleDisplay); +} + +void nsMenuPopupFrame::EnsureActiveMenuListItemIsVisible() { + if (!IsMenuList() || !IsOpen()) { + return; + } + nsIFrame* frame = GetCurrentMenuItemFrame(); + if (!frame) { + return; + } + RefPtr<mozilla::PresShell> presShell = PresShell(); + presShell->ScrollFrameIntoView( + frame, Nothing(), ScrollAxis(), ScrollAxis(), + ScrollFlags::ScrollOverflowHidden | ScrollFlags::ScrollFirstAncestorOnly); +} + +void nsMenuPopupFrame::LayoutPopup(nsPresContext* aPresContext, + ReflowOutput& aDesiredSize, + const ReflowInput& aReflowInput, + nsReflowStatus& aStatus) { + if (IsNativeMenu()) { + return; + } + + SchedulePaint(); + + const bool isOpen = IsOpen(); + if (!isOpen) { + // If the popup is not open, only do layout while showing or if we're a + // menulist. + // + // This is needed because the SelectParent code wants to limit the height of + // the popup before opening it. + // + // TODO(emilio): We should consider adding a way to do that more reliably + // instead, but this preserves existing behavior. + const bool needsLayout = mPopupState == ePopupShowing || + mPopupState == ePopupPositioning || IsMenuList(); + if (!needsLayout) { + RemoveStateBits(NS_FRAME_FIRST_REFLOW); + return; + } + } + + // Do a first reflow, with all our content, in order to find our preferred + // size. Then, we do a second reflow with the updated dimensions. + const bool needsPrefSize = mPrefSize == nsSize(-1, -1) || IsSubtreeDirty(); + if (needsPrefSize) { + // Get the preferred, minimum and maximum size. If the menu is sized to the + // popup, then the popup's width is the menu's width. + ReflowOutput preferredSize(aReflowInput); + nsBlockFrame::Reflow(aPresContext, preferredSize, aReflowInput, aStatus); + mPrefSize = preferredSize.PhysicalSize(); + } + + // Get our desired position and final size, now that we have a preferred size. + auto constraints = GetRects(mPrefSize); + const auto finalSize = constraints.mUsedRect.Size(); + + // We need to do an extra reflow if we haven't reflowed, our size doesn't + // match with our final intended size, or our bsize is unconstrained (in which + // case we need to specify the final size so that percentages work). + const bool needDefiniteReflow = + aReflowInput.ComputedBSize() == NS_UNCONSTRAINEDSIZE || !needsPrefSize || + finalSize != mPrefSize; + + if (needDefiniteReflow) { + ReflowInput constrainedReflowInput(aReflowInput); + const auto& bp = aReflowInput.ComputedPhysicalBorderPadding(); + // TODO: writing-mode handling not terribly correct, but it doesn't matter. + const nsSize finalContentSize(finalSize.width - bp.LeftRight(), + finalSize.height - bp.TopBottom()); + constrainedReflowInput.SetComputedISize(finalContentSize.width); + constrainedReflowInput.SetComputedBSize(finalContentSize.height); + constrainedReflowInput.SetIResize(finalSize.width != mPrefSize.width); + constrainedReflowInput.SetBResize([&] { + if (finalSize.height != mPrefSize.height) { + return true; + } + if (needsPrefSize && + aReflowInput.ComputedBSize() == NS_UNCONSTRAINEDSIZE && + aReflowInput.ComputedMaxBSize() == finalContentSize.height) { + // If we have measured, and maybe clamped our children via max-height, + // they might need to get percentages in the block axis re-resolved. + return true; + } + return false; + }()); + + aStatus.Reset(); + nsBlockFrame::Reflow(aPresContext, aDesiredSize, constrainedReflowInput, + aStatus); + } + + // Set our size, since nsAbsoluteContainingBlock won't. + SetRect(constraints.mUsedRect); + + nsView* view = GetView(); + if (isOpen) { + nsViewManager* viewManager = view->GetViewManager(); + viewManager->ResizeView(view, + nsRect(nsPoint(), constraints.mUsedRect.Size())); + if (mPopupState == ePopupOpening) { + mPopupState = ePopupVisible; + } + + viewManager->SetViewVisibility(view, ViewVisibility::Show); + SyncFrameViewProperties(view); + } + + // Perform our move now. That will position the view and so on. + PerformMove(constraints); + + // finally, if the popup just opened, send a popupshown event + bool openChanged = mIsOpenChanged; + if (openChanged) { + mIsOpenChanged = false; + + // Make sure the current selection in a menulist is visible. + EnsureActiveMenuListItemIsVisible(); + + // If the animate attribute is set to open, check for a transition and wait + // for it to finish before firing the popupshown event. + if (LookAndFeel::GetInt(LookAndFeel::IntID::PanelAnimations) && + mContent->AsElement()->AttrValueIs(kNameSpaceID_None, + nsGkAtoms::animate, nsGkAtoms::open, + eCaseMatters) && + AnimationUtils::HasCurrentTransitions(mContent->AsElement(), + PseudoStyleType::NotPseudo)) { + mPopupShownDispatcher = new nsXULPopupShownEvent(mContent, aPresContext); + mContent->AddSystemEventListener(u"transitionend"_ns, + mPopupShownDispatcher, false, false); + return; + } + + // If there are no transitions, fire the popupshown event right away. + nsCOMPtr<nsIRunnable> event = + new nsXULPopupShownEvent(GetContent(), aPresContext); + mContent->OwnerDoc()->Dispatch(event.forget()); + } +} + +bool nsMenuPopupFrame::IsMenuList() const { + return PopupElement().IsInMenuList(); +} + +bool nsMenuPopupFrame::ShouldExpandToInflowParentOrAnchor() const { + return IsMenuList() && !mContent->GetParent()->AsElement()->AttrValueIs( + kNameSpaceID_None, nsGkAtoms::sizetopopup, + nsGkAtoms::none, eCaseMatters); +} + +nsIContent* nsMenuPopupFrame::GetTriggerContent( + nsMenuPopupFrame* aMenuPopupFrame) { + while (aMenuPopupFrame) { + if (aMenuPopupFrame->mTriggerContent) { + return aMenuPopupFrame->mTriggerContent; + } + + auto* button = XULButtonElement::FromNodeOrNull( + aMenuPopupFrame->GetContent()->GetParent()); + if (!button || !button->IsMenu()) { + break; + } + + auto* popup = button->GetContainingPopupElement(); + if (!popup) { + break; + } + + // check up the menu hierarchy until a popup with a trigger node is found + aMenuPopupFrame = do_QueryFrame(popup->GetPrimaryFrame()); + } + + return nullptr; +} + +void nsMenuPopupFrame::InitPositionFromAnchorAlign(const nsAString& aAnchor, + const nsAString& aAlign) { + mTriggerContent = nullptr; + + if (aAnchor.EqualsLiteral("topleft")) + mPopupAnchor = POPUPALIGNMENT_TOPLEFT; + else if (aAnchor.EqualsLiteral("topright")) + mPopupAnchor = POPUPALIGNMENT_TOPRIGHT; + else if (aAnchor.EqualsLiteral("bottomleft")) + mPopupAnchor = POPUPALIGNMENT_BOTTOMLEFT; + else if (aAnchor.EqualsLiteral("bottomright")) + mPopupAnchor = POPUPALIGNMENT_BOTTOMRIGHT; + else if (aAnchor.EqualsLiteral("leftcenter")) + mPopupAnchor = POPUPALIGNMENT_LEFTCENTER; + else if (aAnchor.EqualsLiteral("rightcenter")) + mPopupAnchor = POPUPALIGNMENT_RIGHTCENTER; + else if (aAnchor.EqualsLiteral("topcenter")) + mPopupAnchor = POPUPALIGNMENT_TOPCENTER; + else if (aAnchor.EqualsLiteral("bottomcenter")) + mPopupAnchor = POPUPALIGNMENT_BOTTOMCENTER; + else + mPopupAnchor = POPUPALIGNMENT_NONE; + + if (aAlign.EqualsLiteral("topleft")) + mPopupAlignment = POPUPALIGNMENT_TOPLEFT; + else if (aAlign.EqualsLiteral("topright")) + mPopupAlignment = POPUPALIGNMENT_TOPRIGHT; + else if (aAlign.EqualsLiteral("bottomleft")) + mPopupAlignment = POPUPALIGNMENT_BOTTOMLEFT; + else if (aAlign.EqualsLiteral("bottomright")) + mPopupAlignment = POPUPALIGNMENT_BOTTOMRIGHT; + else if (aAlign.EqualsLiteral("leftcenter")) + mPopupAlignment = POPUPALIGNMENT_LEFTCENTER; + else if (aAlign.EqualsLiteral("rightcenter")) + mPopupAlignment = POPUPALIGNMENT_RIGHTCENTER; + else if (aAlign.EqualsLiteral("topcenter")) + mPopupAlignment = POPUPALIGNMENT_TOPCENTER; + else if (aAlign.EqualsLiteral("bottomcenter")) + mPopupAlignment = POPUPALIGNMENT_BOTTOMCENTER; + else + mPopupAlignment = POPUPALIGNMENT_NONE; + + mPosition = POPUPPOSITION_UNKNOWN; +} + +static FlipType FlipFromAttribute(nsMenuPopupFrame* aFrame) { + nsAutoString flip; + aFrame->PopupElement().GetAttr(nsGkAtoms::flip, flip); + if (flip.EqualsLiteral("none")) { + return FlipType_None; + } + if (flip.EqualsLiteral("both")) { + return FlipType_Both; + } + if (flip.EqualsLiteral("slide")) { + return FlipType_Slide; + } + return FlipType_Default; +} + +void nsMenuPopupFrame::InitializePopup(nsIContent* aAnchorContent, + nsIContent* aTriggerContent, + const nsAString& aPosition, + int32_t aXPos, int32_t aYPos, + MenuPopupAnchorType aAnchorType, + bool aAttributesOverride) { + auto* widget = GetWidget(); + bool recreateWidget = widget && widget->NeedsRecreateToReshow(); + PrepareWidget(recreateWidget); + + mPopupState = ePopupShowing; + mAnchorContent = aAnchorContent; + mTriggerContent = aTriggerContent; + mXPos = aXPos; + mYPos = aYPos; + mIsNativeMenu = false; + mIsTopLevelContextMenu = false; + mVFlip = false; + mHFlip = false; + mConstrainedByLayout = false; + mAlignmentOffset = 0; + mPositionedOffset = 0; + mPositionedByMoveToRect = false; + + mAnchorType = aAnchorType; + + // if aAttributesOverride is true, then the popupanchor, popupalign and + // position attributes on the <menupopup> override those values passed in. + // If false, those attributes are only used if the values passed in are empty + if (aAnchorContent || aAnchorType == MenuPopupAnchorType_Rect) { + nsAutoString anchor, align, position; + mContent->AsElement()->GetAttr(nsGkAtoms::popupanchor, anchor); + mContent->AsElement()->GetAttr(nsGkAtoms::popupalign, align); + mContent->AsElement()->GetAttr(nsGkAtoms::position, position); + + if (aAttributesOverride) { + // if the attributes are set, clear the offset position. Otherwise, + // the offset is used to adjust the position from the anchor point + if (anchor.IsEmpty() && align.IsEmpty() && position.IsEmpty()) + position.Assign(aPosition); + else + mXPos = mYPos = 0; + } else if (!aPosition.IsEmpty()) { + position.Assign(aPosition); + } + + mFlip = FlipFromAttribute(this); + + position.CompressWhitespace(); + int32_t spaceIdx = position.FindChar(' '); + // if there is a space in the position, assume it is the anchor and + // alignment as two separate tokens. + if (spaceIdx >= 0) { + InitPositionFromAnchorAlign(Substring(position, 0, spaceIdx), + Substring(position, spaceIdx + 1)); + } else if (position.EqualsLiteral("before_start")) { + mPopupAnchor = POPUPALIGNMENT_TOPLEFT; + mPopupAlignment = POPUPALIGNMENT_BOTTOMLEFT; + mPosition = POPUPPOSITION_BEFORESTART; + } else if (position.EqualsLiteral("before_end")) { + mPopupAnchor = POPUPALIGNMENT_TOPRIGHT; + mPopupAlignment = POPUPALIGNMENT_BOTTOMRIGHT; + mPosition = POPUPPOSITION_BEFOREEND; + } else if (position.EqualsLiteral("after_start")) { + mPopupAnchor = POPUPALIGNMENT_BOTTOMLEFT; + mPopupAlignment = POPUPALIGNMENT_TOPLEFT; + mPosition = POPUPPOSITION_AFTERSTART; + } else if (position.EqualsLiteral("after_end")) { + mPopupAnchor = POPUPALIGNMENT_BOTTOMRIGHT; + mPopupAlignment = POPUPALIGNMENT_TOPRIGHT; + mPosition = POPUPPOSITION_AFTEREND; + } else if (position.EqualsLiteral("start_before")) { + mPopupAnchor = POPUPALIGNMENT_TOPLEFT; + mPopupAlignment = POPUPALIGNMENT_TOPRIGHT; + mPosition = POPUPPOSITION_STARTBEFORE; + } else if (position.EqualsLiteral("start_after")) { + mPopupAnchor = POPUPALIGNMENT_BOTTOMLEFT; + mPopupAlignment = POPUPALIGNMENT_BOTTOMRIGHT; + mPosition = POPUPPOSITION_STARTAFTER; + } else if (position.EqualsLiteral("end_before")) { + mPopupAnchor = POPUPALIGNMENT_TOPRIGHT; + mPopupAlignment = POPUPALIGNMENT_TOPLEFT; + mPosition = POPUPPOSITION_ENDBEFORE; + } else if (position.EqualsLiteral("end_after")) { + mPopupAnchor = POPUPALIGNMENT_BOTTOMRIGHT; + mPopupAlignment = POPUPALIGNMENT_BOTTOMLEFT; + mPosition = POPUPPOSITION_ENDAFTER; + } else if (position.EqualsLiteral("overlap")) { + mPopupAnchor = POPUPALIGNMENT_TOPLEFT; + mPopupAlignment = POPUPALIGNMENT_TOPLEFT; + mPosition = POPUPPOSITION_OVERLAP; + } else if (position.EqualsLiteral("after_pointer")) { + mPopupAnchor = POPUPALIGNMENT_TOPLEFT; + mPopupAlignment = POPUPALIGNMENT_TOPLEFT; + mPosition = POPUPPOSITION_AFTERPOINTER; + // XXXndeakin this is supposed to anchor vertically after, but with the + // horizontal position as the mouse pointer. + mYPos += 21; + } else if (position.EqualsLiteral("selection")) { + mPopupAnchor = POPUPALIGNMENT_BOTTOMLEFT; + mPopupAlignment = POPUPALIGNMENT_TOPLEFT; + mPosition = POPUPPOSITION_SELECTION; + } else { + InitPositionFromAnchorAlign(anchor, align); + } + } + // When converted back to CSSIntRect it is (-1, -1, 0, 0) - as expected in + // nsXULPopupManager::Rollup + mScreenRect = nsRect(-AppUnitsPerCSSPixel(), -AppUnitsPerCSSPixel(), 0, 0); + + if (aAttributesOverride) { + // Use |left| and |top| dimension attributes to position the popup if + // present, as they may have been persisted. + nsAutoString left, top; + mContent->AsElement()->GetAttr(nsGkAtoms::left, left); + mContent->AsElement()->GetAttr(nsGkAtoms::top, top); + + nsresult err; + if (!left.IsEmpty()) { + int32_t x = left.ToInteger(&err); + if (NS_SUCCEEDED(err)) { + mScreenRect.x = CSSPixel::ToAppUnits(x); + } + } + if (!top.IsEmpty()) { + int32_t y = top.ToInteger(&err); + if (NS_SUCCEEDED(err)) { + mScreenRect.y = CSSPixel::ToAppUnits(y); + } + } + } +} + +void nsMenuPopupFrame::InitializePopupAtScreen(nsIContent* aTriggerContent, + int32_t aXPos, int32_t aYPos, + bool aIsContextMenu) { + auto* widget = GetWidget(); + bool recreateWidget = widget && widget->NeedsRecreateToReshow(); + PrepareWidget(recreateWidget); + + mPopupState = ePopupShowing; + mAnchorContent = nullptr; + mTriggerContent = aTriggerContent; + mScreenRect = + nsRect(CSSPixel::ToAppUnits(aXPos), CSSPixel::ToAppUnits(aYPos), 0, 0); + mXPos = 0; + mYPos = 0; + mFlip = FlipFromAttribute(this); + mPopupAnchor = POPUPALIGNMENT_NONE; + mPopupAlignment = POPUPALIGNMENT_NONE; + mPosition = POPUPPOSITION_UNKNOWN; + mIsContextMenu = aIsContextMenu; + mIsTopLevelContextMenu = aIsContextMenu; + mIsNativeMenu = false; + mAnchorType = MenuPopupAnchorType_Point; + mPositionedOffset = 0; + mPositionedByMoveToRect = false; +} + +void nsMenuPopupFrame::InitializePopupAsNativeContextMenu( + nsIContent* aTriggerContent, int32_t aXPos, int32_t aYPos) { + mTriggerContent = aTriggerContent; + mPopupState = ePopupShowing; + mAnchorContent = nullptr; + mScreenRect = + nsRect(CSSPixel::ToAppUnits(aXPos), CSSPixel::ToAppUnits(aYPos), 0, 0); + mXPos = 0; + mYPos = 0; + mFlip = FlipType_Default; + mPopupAnchor = POPUPALIGNMENT_NONE; + mPopupAlignment = POPUPALIGNMENT_NONE; + mPosition = POPUPPOSITION_UNKNOWN; + mIsContextMenu = true; + mIsTopLevelContextMenu = true; + mIsNativeMenu = true; + mAnchorType = MenuPopupAnchorType_Point; + mPositionedOffset = 0; + mPositionedByMoveToRect = false; +} + +void nsMenuPopupFrame::InitializePopupAtRect(nsIContent* aTriggerContent, + const nsAString& aPosition, + const nsIntRect& aRect, + bool aAttributesOverride) { + InitializePopup(nullptr, aTriggerContent, aPosition, 0, 0, + MenuPopupAnchorType_Rect, aAttributesOverride); + mScreenRect = ToAppUnits(aRect, AppUnitsPerCSSPixel()); +} + +void nsMenuPopupFrame::ShowPopup(bool aIsContextMenu) { + mIsContextMenu = aIsContextMenu; + + InvalidateFrameSubtree(); + + if (mPopupState == ePopupShowing || mPopupState == ePopupPositioning) { + mPopupState = ePopupOpening; + mIsOpenChanged = true; + + // Clear mouse capture when a popup is opened. + if (mPopupType == PopupType::Menu) { + if (auto* activeESM = EventStateManager::GetActiveEventStateManager()) { + EventStateManager::ClearGlobalActiveContent(activeESM); + } + + PresShell::ReleaseCapturingContent(); + } + + if (RefPtr menu = PopupElement().GetContainingMenu()) { + menu->PopupOpened(); + } + + // We skip laying out children if we're closed, so make sure that we do a + // full dirty reflow when opening to pick up any potential change. + PresShell()->FrameNeedsReflow( + this, IntrinsicDirty::FrameAncestorsAndDescendants, NS_FRAME_IS_DIRTY); + + if (mPopupType == PopupType::Menu) { + nsCOMPtr<nsISound> sound(do_GetService("@mozilla.org/sound;1")); + if (sound) sound->PlayEventSound(nsISound::EVENT_MENU_POPUP); + } + } +} + +void nsMenuPopupFrame::ClearTriggerContentIncludingDocument() { + // clear the trigger content if the popup is being closed. But don't clear + // it if the popup is just being made invisible as a popuphiding or command + if (mTriggerContent) { + // if the popup had a trigger node set, clear the global window popup node + // as well + Document* doc = mContent->GetUncomposedDoc(); + if (doc) { + if (nsPIDOMWindowOuter* win = doc->GetWindow()) { + nsCOMPtr<nsPIWindowRoot> root = win->GetTopWindowRoot(); + if (root) { + root->SetPopupNode(nullptr); + } + } + } + } + mTriggerContent = nullptr; +} + +void nsMenuPopupFrame::HidePopup(bool aDeselectMenu, nsPopupState aNewState, + bool aFromFrameDestruction) { + NS_ASSERTION(aNewState == ePopupClosed || aNewState == ePopupInvisible, + "popup being set to unexpected state"); + + ClearPopupShownDispatcher(); + + // don't hide the popup when it isn't open + if (mPopupState == ePopupClosed || mPopupState == ePopupShowing || + mPopupState == ePopupPositioning) { + return; + } + + if (aNewState == ePopupClosed) { + // clear the trigger content if the popup is being closed. But don't clear + // it if the popup is just being made invisible as a popuphiding or command + // event may want to retrieve it. + ClearTriggerContentIncludingDocument(); + mAnchorContent = nullptr; + } + + // when invisible and about to be closed, HidePopup has already been called, + // so just set the new state to closed and return + if (mPopupState == ePopupInvisible) { + if (aNewState == ePopupClosed) { + mPopupState = ePopupClosed; + } + return; + } + + mPopupState = aNewState; + + mIncrementalString.Truncate(); + + mIsOpenChanged = false; + mHFlip = mVFlip = false; + mConstrainedByLayout = false; + + if (auto* widget = GetWidget()) { + // Ideally we should call ClearCachedWebrenderResources but there are + // intermittent failures (see bug 1748788), so we currently call + // ClearWebrenderAnimationResources instead. + widget->ClearWebrenderAnimationResources(); + } + + nsView* view = GetView(); + nsViewManager* viewManager = view->GetViewManager(); + viewManager->SetViewVisibility(view, ViewVisibility::Hide); + + RefPtr popup = &PopupElement(); + // XXX, bug 137033, In Windows, if mouse is outside the window when the + // menupopup closes, no mouse_enter/mouse_exit event will be fired to clear + // current hover state, we should clear it manually. This code may not the + // best solution, but we can leave it here until we find the better approach. + if (!aFromFrameDestruction && + popup->State().HasState(dom::ElementState::HOVER)) { + EventStateManager* esm = PresContext()->EventStateManager(); + esm->SetContentState(nullptr, dom::ElementState::HOVER); + } + popup->PopupClosed(aDeselectMenu); +} + +nsPoint nsMenuPopupFrame::AdjustPositionForAnchorAlign( + nsRect& anchorRect, const nsSize& aPrefSize, FlipStyle& aHFlip, + FlipStyle& aVFlip) const { + // flip the anchor and alignment for right-to-left + int8_t popupAnchor(mPopupAnchor); + int8_t popupAlign(mPopupAlignment); + if (IsDirectionRTL()) { + // no need to flip the centered anchor types vertically + if (popupAnchor <= POPUPALIGNMENT_LEFTCENTER) { + popupAnchor = -popupAnchor; + } + popupAlign = -popupAlign; + } + + nsRect originalAnchorRect(anchorRect); + + // first, determine at which corner of the anchor the popup should appear + nsPoint pnt; + switch (popupAnchor) { + case POPUPALIGNMENT_LEFTCENTER: + pnt = nsPoint(anchorRect.x, anchorRect.y + anchorRect.height / 2); + anchorRect.y = pnt.y; + anchorRect.height = 0; + break; + case POPUPALIGNMENT_RIGHTCENTER: + pnt = nsPoint(anchorRect.XMost(), anchorRect.y + anchorRect.height / 2); + anchorRect.y = pnt.y; + anchorRect.height = 0; + break; + case POPUPALIGNMENT_TOPCENTER: + pnt = nsPoint(anchorRect.x + anchorRect.width / 2, anchorRect.y); + anchorRect.x = pnt.x; + anchorRect.width = 0; + break; + case POPUPALIGNMENT_BOTTOMCENTER: + pnt = nsPoint(anchorRect.x + anchorRect.width / 2, anchorRect.YMost()); + anchorRect.x = pnt.x; + anchorRect.width = 0; + break; + case POPUPALIGNMENT_TOPRIGHT: + pnt = anchorRect.TopRight(); + break; + case POPUPALIGNMENT_BOTTOMLEFT: + pnt = anchorRect.BottomLeft(); + break; + case POPUPALIGNMENT_BOTTOMRIGHT: + pnt = anchorRect.BottomRight(); + break; + case POPUPALIGNMENT_TOPLEFT: + default: + pnt = anchorRect.TopLeft(); + break; + } + + // If the alignment is on the right edge of the popup, move the popup left + // by the width. Similarly, if the alignment is on the bottom edge of the + // popup, move the popup up by the height. In addition, account for the + // margins of the popup on the edge on which it is aligned. + nsMargin margin = GetMargin(); + switch (popupAlign) { + case POPUPALIGNMENT_LEFTCENTER: + pnt.MoveBy(margin.left, -aPrefSize.height / 2); + break; + case POPUPALIGNMENT_RIGHTCENTER: + pnt.MoveBy(-aPrefSize.width - margin.right, -aPrefSize.height / 2); + break; + case POPUPALIGNMENT_TOPCENTER: + pnt.MoveBy(-aPrefSize.width / 2, margin.top); + break; + case POPUPALIGNMENT_BOTTOMCENTER: + pnt.MoveBy(-aPrefSize.width / 2, -aPrefSize.height - margin.bottom); + break; + case POPUPALIGNMENT_TOPRIGHT: + pnt.MoveBy(-aPrefSize.width - margin.right, margin.top); + break; + case POPUPALIGNMENT_BOTTOMLEFT: + pnt.MoveBy(margin.left, -aPrefSize.height - margin.bottom); + break; + case POPUPALIGNMENT_BOTTOMRIGHT: + pnt.MoveBy(-aPrefSize.width - margin.right, + -aPrefSize.height - margin.bottom); + break; + case POPUPALIGNMENT_TOPLEFT: + default: + pnt.MoveBy(margin.left, margin.top); + break; + } + + // If we aligning to the selected item in the popup, adjust the vertical + // position by the height of the menulist label and the selected item's + // position. + if (mPosition == POPUPPOSITION_SELECTION) { + MOZ_ASSERT(popupAnchor == POPUPALIGNMENT_BOTTOMLEFT || + popupAnchor == POPUPALIGNMENT_BOTTOMRIGHT); + MOZ_ASSERT(popupAlign == POPUPALIGNMENT_TOPLEFT || + popupAlign == POPUPALIGNMENT_TOPRIGHT); + + // Only adjust the popup if it just opened, otherwise the popup will move + // around if its gets resized or the selection changed. Cache the value in + // mPositionedOffset and use that instead for any future calculations. + if (mIsOpenChanged) { + if (nsIFrame* selectedItemFrame = GetSelectedItemForAlignment()) { + const nscoord itemHeight = selectedItemFrame->GetRect().height; + const nscoord itemOffset = + selectedItemFrame->GetOffsetToIgnoringScrolling(this).y; + // We want to line-up the anchor rect with the selected item, but if the + // selected item is outside of our bounds, we don't want to shift the + // popup up in a way that our box would no longer intersect with the + // anchor. + nscoord maxOffset = aPrefSize.height - itemHeight; + if (const nsIScrollableFrame* sf = GetScrollFrame()) { + // HACK: We ideally would want to use the offset from the bottom + // bottom of our scroll-frame to the bottom of our frame (so as to + // ensure that the bottom of the scrollport is inside the anchor + // rect). + // + // But at this point of the code, the scroll frame may not be laid out + // with a definite size (might be overflowing us). + // + // So, we assume the offset from the bottom is symmetric to the offset + // from the top. This holds for all the popups where this matters + // (menulists on macOS, effectively), and seems better than somehow + // moving the popup after the fact as we used to do. + const nsIFrame* f = do_QueryFrame(sf); + maxOffset -= f->GetOffsetTo(this).y; + } + mPositionedOffset = + originalAnchorRect.height + std::min(itemOffset, maxOffset); + } + } + + pnt.y -= mPositionedOffset; + } + + // Flipping horizontally is allowed as long as the popup is above or below + // the anchor. This will happen if both the anchor and alignment are top or + // both are bottom, but different values. Similarly, flipping vertically is + // allowed if the popup is to the left or right of the anchor. In this case, + // the values of the constants are such that both must be positive or both + // must be negative. A special case, used for overlap, allows flipping + // vertically as well. + // If we are flipping in both directions, we want to set a flip style both + // horizontally and vertically. However, we want to flip on the inside edge + // of the anchor. Consider the example of a typical dropdown menu. + // Vertically, we flip the popup on the outside edges of the anchor menu, + // however horizontally, we want to to use the inside edges so the popup + // still appears underneath the anchor menu instead of floating off the + // side of the menu. + switch (popupAnchor) { + case POPUPALIGNMENT_LEFTCENTER: + case POPUPALIGNMENT_RIGHTCENTER: + aHFlip = FlipStyle_Outside; + aVFlip = FlipStyle_Inside; + break; + case POPUPALIGNMENT_TOPCENTER: + case POPUPALIGNMENT_BOTTOMCENTER: + aHFlip = FlipStyle_Inside; + aVFlip = FlipStyle_Outside; + break; + default: { + FlipStyle anchorEdge = + mFlip == FlipType_Both ? FlipStyle_Inside : FlipStyle_None; + aHFlip = (popupAnchor == -popupAlign) ? FlipStyle_Outside : anchorEdge; + if (((popupAnchor > 0) == (popupAlign > 0)) || + (popupAnchor == POPUPALIGNMENT_TOPLEFT && + popupAlign == POPUPALIGNMENT_TOPLEFT)) + aVFlip = FlipStyle_Outside; + else + aVFlip = anchorEdge; + break; + } + } + + return pnt; +} + +nsIFrame* nsMenuPopupFrame::GetSelectedItemForAlignment() const { + // This method adjusts a menulist's popup such that the selected item is under + // the cursor, aligned with the menulist label. + nsCOMPtr<nsIDOMXULSelectControlElement> select; + if (mAnchorContent) { + select = mAnchorContent->AsElement()->AsXULSelectControl(); + } + + if (!select) { + // If there isn't an anchor, then try just getting the parent of the popup. + select = mContent->GetParent()->AsElement()->AsXULSelectControl(); + if (!select) { + return nullptr; + } + } + + nsCOMPtr<Element> selectedElement; + select->GetSelectedItem(getter_AddRefs(selectedElement)); + return selectedElement ? selectedElement->GetPrimaryFrame() : nullptr; +} + +nscoord nsMenuPopupFrame::SlideOrResize(nscoord& aScreenPoint, nscoord aSize, + nscoord aScreenBegin, + nscoord aScreenEnd, + nscoord* aOffset) const { + // The popup may be positioned such that either the left/top or bottom/right + // is outside the screen - but never both. + nscoord newPos = + std::max(aScreenBegin, std::min(aScreenEnd - aSize, aScreenPoint)); + *aOffset = newPos - aScreenPoint; + aScreenPoint = newPos; + return std::min(aSize, aScreenEnd - aScreenPoint); +} + +nscoord nsMenuPopupFrame::FlipOrResize(nscoord& aScreenPoint, nscoord aSize, + nscoord aScreenBegin, nscoord aScreenEnd, + nscoord aAnchorBegin, nscoord aAnchorEnd, + nscoord aMarginBegin, nscoord aMarginEnd, + FlipStyle aFlip, bool aEndAligned, + bool* aFlipSide) const { + // The flip side argument will be set to true if there wasn't room and we + // flipped to the opposite side. + *aFlipSide = false; + + // all of the coordinates used here are in app units relative to the screen + nscoord popupSize = aSize; + if (aScreenPoint < aScreenBegin) { + // at its current position, the popup would extend past the left or top + // edge of the screen, so it will have to be moved or resized. + if (aFlip) { + // for inside flips, we flip on the opposite side of the anchor + nscoord startpos = aFlip == FlipStyle_Outside ? aAnchorBegin : aAnchorEnd; + nscoord endpos = aFlip == FlipStyle_Outside ? aAnchorEnd : aAnchorBegin; + + // check whether there is more room to the left and right (or top and + // bottom) of the anchor and put the popup on the side with more room. + if (startpos - aScreenBegin >= aScreenEnd - endpos) { + aScreenPoint = aScreenBegin; + popupSize = startpos - aScreenPoint - aMarginEnd; + *aFlipSide = !aEndAligned; + } else { + // If the newly calculated position is different than the existing + // position, flip such that the popup is to the right or bottom of the + // anchor point instead . However, when flipping use the same margin + // size. + nscoord newScreenPoint = endpos + aMarginEnd; + if (newScreenPoint != aScreenPoint) { + *aFlipSide = aEndAligned; + aScreenPoint = newScreenPoint; + // check if the new position is still off the right or bottom edge of + // the screen. If so, resize the popup. + if (aScreenPoint + aSize > aScreenEnd) { + popupSize = aScreenEnd - aScreenPoint; + } + } + } + } else { + aScreenPoint = aScreenBegin; + } + } else if (aScreenPoint + aSize > aScreenEnd) { + // at its current position, the popup would extend past the right or + // bottom edge of the screen, so it will have to be moved or resized. + if (aFlip) { + // for inside flips, we flip on the opposite side of the anchor + nscoord startpos = aFlip == FlipStyle_Outside ? aAnchorBegin : aAnchorEnd; + nscoord endpos = aFlip == FlipStyle_Outside ? aAnchorEnd : aAnchorBegin; + + // check whether there is more room to the left and right (or top and + // bottom) of the anchor and put the popup on the side with more room. + if (aScreenEnd - endpos >= startpos - aScreenBegin) { + *aFlipSide = aEndAligned; + if (mIsContextMenu) { + aScreenPoint = aScreenEnd - aSize; + } else { + aScreenPoint = endpos + aMarginBegin; + popupSize = aScreenEnd - aScreenPoint; + } + } else { + // if the newly calculated position is different than the existing + // position, we flip such that the popup is to the left or top of the + // anchor point instead. + nscoord newScreenPoint = startpos - aSize - aMarginBegin; + if (newScreenPoint != aScreenPoint) { + *aFlipSide = !aEndAligned; + aScreenPoint = newScreenPoint; + + // check if the new position is still off the left or top edge of the + // screen. If so, resize the popup. + if (aScreenPoint < aScreenBegin) { + aScreenPoint = aScreenBegin; + if (!mIsContextMenu) { + popupSize = startpos - aScreenPoint - aMarginBegin; + } + } + } + } + } else { + aScreenPoint = aScreenEnd - aSize; + } + } + + // Make sure that the point is within the screen boundaries and that the + // size isn't off the edge of the screen. This can happen when a large + // positive or negative margin is used. + if (aScreenPoint < aScreenBegin) { + aScreenPoint = aScreenBegin; + } + if (aScreenPoint > aScreenEnd) { + aScreenPoint = aScreenEnd - aSize; + } + + // If popupSize ended up being negative, or the original size was actually + // smaller than the calculated popup size, just use the original size instead. + if (popupSize <= 0 || aSize < popupSize) { + popupSize = aSize; + } + + return std::min(popupSize, aScreenEnd - aScreenPoint); +} + +nsRect nsMenuPopupFrame::ComputeAnchorRect(nsPresContext* aRootPresContext, + nsIFrame* aAnchorFrame) const { + // Get the root frame for a reference + nsIFrame* rootFrame = aRootPresContext->PresShell()->GetRootFrame(); + + // The dimensions of the anchor + nsRect anchorRect = aAnchorFrame->GetRectRelativeToSelf(); + + // Relative to the root + anchorRect = nsLayoutUtils::TransformFrameRectToAncestor( + aAnchorFrame, anchorRect, rootFrame); + // Relative to the screen + anchorRect.MoveBy(rootFrame->GetScreenRectInAppUnits().TopLeft()); + + // In its own app units + return anchorRect.ScaleToOtherAppUnitsRoundOut( + aRootPresContext->AppUnitsPerDevPixel(), + PresContext()->AppUnitsPerDevPixel()); +} + +static nsIFrame* MaybeDelegatedAnchorFrame(nsIFrame* aFrame) { + if (!aFrame) { + return nullptr; + } + if (auto* element = Element::FromNodeOrNull(aFrame->GetContent())) { + if (element->HasAttr(nsGkAtoms::delegatesanchor)) { + for (nsIFrame* f : aFrame->PrincipalChildList()) { + if (!f->IsPlaceholderFrame()) { + return f; + } + } + } + } + return aFrame; +} + +auto nsMenuPopupFrame::GetRects(const nsSize& aPrefSize) const -> Rects { + if (NS_WARN_IF(aPrefSize == nsSize(-1, -1))) { + // Return early if the popup hasn't been laid out yet. On Windows, this can + // happen when using a drag popup before it opens. + return {}; + } + + nsPresContext* pc = PresContext(); + nsIFrame* rootFrame = pc->PresShell()->GetRootFrame(); + NS_ASSERTION(rootFrame->GetView() && GetView() && + rootFrame->GetView() == GetView()->GetParent(), + "rootFrame's view is not our view's parent???"); + + // Indicators of whether the popup should be flipped or resized. + FlipStyle hFlip = FlipStyle_None, vFlip = FlipStyle_None; + + const nsMargin margin = GetMargin(); + + // the screen rectangle of the root frame, in dev pixels. + const nsRect rootScreenRect = rootFrame->GetScreenRectInAppUnits(); + + const bool isNoAutoHide = IsNoAutoHide(); + const PopupLevel popupLevel = GetPopupLevel(isNoAutoHide); + + Rects result; + + // Set the popup's size to the preferred size. Below, this size will be + // adjusted to fit on the screen or within the content area. If the anchor is + // sized to the popup, use the anchor's width instead of the preferred width. + result.mUsedRect = nsRect(nsPoint(), aPrefSize); + + const bool anchored = IsAnchored(); + if (anchored) { + // In order to deal with transforms, we need the root prescontext: + nsPresContext* rootPc = pc->GetRootPresContext(); + if (NS_WARN_IF(!rootPc)) { + // If we can't reach a root pres context, don't bother continuing. + return result; + } + + result.mAnchorRect = result.mUntransformedAnchorRect = [&] { + // If anchored to a rectangle, use that rectangle. Otherwise, determine + // the rectangle from the anchor. + if (mAnchorType == MenuPopupAnchorType_Rect) { + return mScreenRect; + } + // if the frame is not specified, use the anchor node passed to OpenPopup. + // If that wasn't specified either, use the root frame. Note that + // mAnchorContent might be a different document so its presshell must be + // used. + nsIFrame* anchorFrame = GetAnchorFrame(); + if (!anchorFrame) { + return rootScreenRect; + } + return ComputeAnchorRect(rootPc, anchorFrame); + }(); + + // if we are anchored, there are certain things we don't want to do when + // repositioning the popup to fit on the screen, such as end up positioned + // over the anchor, for instance a popup appearing over the menu label. + // When doing this reposition, we want to move the popup to the side with + // the most room. The combination of anchor and alignment dictate if we + // readjust above/below or to the left/right. + if (mAnchorContent || mAnchorType == MenuPopupAnchorType_Rect) { + // move the popup according to the anchor and alignment. This will also + // tell us which axis the popup is flush against in case we have to move + // it around later. The AdjustPositionForAnchorAlign method accounts for + // the popup's margin. + result.mUsedRect.MoveTo(AdjustPositionForAnchorAlign( + result.mAnchorRect, aPrefSize, hFlip, vFlip)); + } else { + // With no anchor, the popup is positioned relative to the root frame. + result.mUsedRect.MoveTo(result.mAnchorRect.TopLeft() + + nsPoint(margin.left, margin.top)); + } + + // mXPos and mYPos specify an additional offset passed to OpenPopup that + // should be added to the position. We also add the offset to the anchor + // pos so a later flip/resize takes the offset into account. + // FIXME(emilio): Wayland doesn't seem to be accounting for this offset + // anywhere, and it probably should. + { + nsPoint offset(CSSPixel::ToAppUnits(mXPos), CSSPixel::ToAppUnits(mYPos)); + if (IsDirectionRTL()) { + offset.x = -offset.x; + } + result.mUsedRect.MoveBy(offset); + result.mAnchorRect.MoveBy(offset); + } + } else { + // Not anchored, use mScreenRect + result.mUsedRect.MoveTo(mScreenRect.TopLeft()); + result.mAnchorRect = result.mUntransformedAnchorRect = + nsRect(mScreenRect.TopLeft(), nsSize()); + + // Right-align RTL context menus, and apply margin and offsets as per the + // platform conventions. + if (mIsContextMenu && IsDirectionRTL()) { + result.mUsedRect.x -= aPrefSize.Width(); + result.mUsedRect.MoveBy(-margin.right, margin.top); + } else { + result.mUsedRect.MoveBy(margin.left, margin.top); + } +#ifdef XP_MACOSX + // OSX tooltips follow standard flip rule but other popups flip horizontally + // not vertically + if (mPopupType == PopupType::Tooltip) { + vFlip = FlipStyle_Outside; + } else { + hFlip = FlipStyle_Outside; + } +#else + // Other OS screen positioned popups can be flipped vertically but never + // horizontally + vFlip = FlipStyle_Outside; +#endif // #ifdef XP_MACOSX + } + + const int32_t a2d = pc->AppUnitsPerDevPixel(); + + nsView* view = GetView(); + NS_ASSERTION(view, "popup with no view"); + + nsIWidget* widget = view->GetWidget(); + + // If a panel has flip="none", don't constrain or flip it. + // Also, always do this for content shells, so that the popup doesn't extend + // outside the containing frame. + if (mInContentShell || mFlip != FlipType_None) { + const Maybe<nsRect> constraintRect = + GetConstraintRect(result.mAnchorRect, rootScreenRect, popupLevel); + + if (constraintRect) { + // Ensure that anchorRect is on the constraint rect. + result.mAnchorRect = result.mAnchorRect.Intersect(*constraintRect); + // Shrink the popup down if it is larger than the constraint size + if (result.mUsedRect.width > constraintRect->width) { + result.mUsedRect.width = constraintRect->width; + } + if (result.mUsedRect.height > constraintRect->height) { + result.mUsedRect.height = constraintRect->height; + } + result.mConstrainedByLayout = true; + } + + if (IS_WAYLAND_DISPLAY() && widget) { + // Shrink the popup down if it's larger than popup size received from + // Wayland compositor. We don't know screen size on Wayland so this is the + // only info we have there. + const nsSize waylandSize = LayoutDeviceIntRect::ToAppUnits( + widget->GetMoveToRectPopupSize(), a2d); + if (waylandSize.width > 0 && result.mUsedRect.width > waylandSize.width) { + LOG_WAYLAND("Wayland constraint width [%p]: %d to %d", widget, + result.mUsedRect.width, waylandSize.width); + result.mUsedRect.width = waylandSize.width; + } + if (waylandSize.height > 0 && + result.mUsedRect.height > waylandSize.height) { + LOG_WAYLAND("Wayland constraint height [%p]: %d to %d", widget, + result.mUsedRect.height, waylandSize.height); + result.mUsedRect.height = waylandSize.height; + } + if (RefPtr<widget::Screen> s = widget->GetWidgetScreen()) { + const nsSize screenSize = + LayoutDeviceIntSize::ToAppUnits(s->GetAvailRect().Size(), a2d); + if (result.mUsedRect.height > screenSize.height) { + LOG_WAYLAND("Wayland constraint height to screen [%p]: %d to %d", + widget, result.mUsedRect.height, screenSize.height); + result.mUsedRect.height = screenSize.height; + } + if (result.mUsedRect.width > screenSize.width) { + LOG_WAYLAND("Wayland constraint widthto screen [%p]: %d to %d", + widget, result.mUsedRect.width, screenSize.width); + result.mUsedRect.width = screenSize.width; + } + } + } + + // At this point the anchor (anchorRect) is within the available screen + // area (constraintRect) and the popup is known to be no larger than the + // screen. + if (constraintRect) { + // We might want to "slide" an arrow if the panel is of the correct type - + // but we can only slide on one axis - the other axis must be "flipped or + // resized" as normal. + bool slideHorizontal = false, slideVertical = false; + if (mFlip == FlipType_Slide) { + int8_t position = GetAlignmentPosition(); + slideHorizontal = position >= POPUPPOSITION_BEFORESTART && + position <= POPUPPOSITION_AFTEREND; + slideVertical = position >= POPUPPOSITION_STARTBEFORE && + position <= POPUPPOSITION_ENDAFTER; + } + + // Next, check if there is enough space to show the popup at full size + // when positioned at screenPoint. If not, flip the popups to the opposite + // side of their anchor point, or resize them as necessary. + if (slideHorizontal) { + result.mUsedRect.width = SlideOrResize( + result.mUsedRect.x, result.mUsedRect.width, constraintRect->x, + constraintRect->XMost(), &result.mAlignmentOffset); + } else { + const bool endAligned = + IsDirectionRTL() + ? mPopupAlignment == POPUPALIGNMENT_TOPLEFT || + mPopupAlignment == POPUPALIGNMENT_BOTTOMLEFT || + mPopupAlignment == POPUPALIGNMENT_LEFTCENTER + : mPopupAlignment == POPUPALIGNMENT_TOPRIGHT || + mPopupAlignment == POPUPALIGNMENT_BOTTOMRIGHT || + mPopupAlignment == POPUPALIGNMENT_RIGHTCENTER; + result.mUsedRect.width = FlipOrResize( + result.mUsedRect.x, result.mUsedRect.width, constraintRect->x, + constraintRect->XMost(), result.mAnchorRect.x, + result.mAnchorRect.XMost(), margin.left, margin.right, hFlip, + endAligned, &result.mHFlip); + } + if (slideVertical) { + result.mUsedRect.height = SlideOrResize( + result.mUsedRect.y, result.mUsedRect.height, constraintRect->y, + constraintRect->YMost(), &result.mAlignmentOffset); + } else { + bool endAligned = mPopupAlignment == POPUPALIGNMENT_BOTTOMLEFT || + mPopupAlignment == POPUPALIGNMENT_BOTTOMRIGHT || + mPopupAlignment == POPUPALIGNMENT_BOTTOMCENTER; + result.mUsedRect.height = FlipOrResize( + result.mUsedRect.y, result.mUsedRect.height, constraintRect->y, + constraintRect->YMost(), result.mAnchorRect.y, + result.mAnchorRect.YMost(), margin.top, margin.bottom, vFlip, + endAligned, &result.mVFlip); + } + +#ifdef DEBUG + NS_ASSERTION(constraintRect->Contains(result.mUsedRect), + "Popup is offscreen"); + if (!constraintRect->Contains(result.mUsedRect)) { + NS_WARNING(nsPrintfCString("Popup is offscreen (%s vs. %s)", + ToString(constraintRect).c_str(), + ToString(result.mUsedRect).c_str()) + .get()); + } +#endif + } + } + // snap the popup's position in screen coordinates to device pixels, see + // bug 622507, bug 961431 + result.mUsedRect.x = pc->RoundAppUnitsToNearestDevPixels(result.mUsedRect.x); + result.mUsedRect.y = pc->RoundAppUnitsToNearestDevPixels(result.mUsedRect.y); + + // determine the x and y position of the view by subtracting the desired + // screen position from the screen position of the root frame. + result.mViewPoint = result.mUsedRect.TopLeft() - rootScreenRect.TopLeft(); + + // Offset the position by the width and height of the borders and titlebar. + // Even though GetClientOffset should return (0, 0) when there is no titlebar + // or borders, we skip these calculations anyway for non-panels to save time + // since they will never have a titlebar. + if (mPopupType == PopupType::Panel && widget) { + result.mClientOffset = widget->GetClientOffset(); + result.mViewPoint += + LayoutDeviceIntPoint::ToAppUnits(result.mClientOffset, a2d); + } + + return result; +} + +void nsMenuPopupFrame::SetPopupPosition(bool aIsMove) { + if (aIsMove && (mPrefSize.width == -1 || mPrefSize.height == -1)) { + return; + } + + auto rects = GetRects(mPrefSize); + if (rects.mUsedRect.Size() != mRect.Size()) { + MOZ_ASSERT(!HasAnyStateBits(NS_FRAME_IN_REFLOW)); + // We need to resize on top of moving, trigger an actual reflow. + PresShell()->FrameNeedsReflow(this, IntrinsicDirty::FrameAndAncestors, + NS_FRAME_IS_DIRTY); + return; + } + PerformMove(rects); +} + +void nsMenuPopupFrame::PerformMove(const Rects& aRects) { + auto* ps = PresShell(); + + // We're just moving, sync frame position and offset as needed. + ps->GetViewManager()->MoveViewTo(GetView(), aRects.mViewPoint.x, + aRects.mViewPoint.y); + + // Now that we've positioned the view, sync up the frame's origin. + nsBlockFrame::SetPosition(aRects.mViewPoint - + GetParent()->GetOffsetTo(ps->GetRootFrame())); + + // If the popup is in the positioned state or if it is shown and the position + // or size changed, dispatch a popuppositioned event if the popup wants it. + if (mPopupState == ePopupPositioning || + (mPopupState == ePopupShown && + !aRects.mUsedRect.IsEqualEdges(mUsedScreenRect)) || + (mPopupState == ePopupShown && + aRects.mAlignmentOffset != mAlignmentOffset)) { + mUsedScreenRect = aRects.mUsedRect; + if (!HasAnyStateBits(NS_FRAME_FIRST_REFLOW) && !mPendingPositionedEvent) { + mPendingPositionedEvent = + nsXULPopupPositionedEvent::DispatchIfNeeded(mContent->AsElement()); + } + } + + if (!mPositionedByMoveToRect) { + mUntransformedAnchorRect = aRects.mUntransformedAnchorRect; + } + + mAlignmentOffset = aRects.mAlignmentOffset; + mLastClientOffset = aRects.mClientOffset; + mHFlip = aRects.mHFlip; + mVFlip = aRects.mVFlip; + mConstrainedByLayout = aRects.mConstrainedByLayout; + + // If this is a noautohide popup, set the screen coordinates of the popup. + // This way, the popup stays at the location where it was opened even when the + // window is moved. Popups at the parent level follow the parent window as it + // is moved and remained anchored, so we want to maintain the anchoring + // instead. + // + // FIXME: This suffers from issues like bug 1823552, where constraints imposed + // by the anchor are lost, but this is super-old behavior. + const bool fixPositionToPoint = + IsNoAutoHide() && (GetPopupLevel() != PopupLevel::Parent || + mAnchorType == MenuPopupAnchorType_Rect); + if (fixPositionToPoint) { + // Account for the margin that will end up being added to the screen + // coordinate the next time SetPopupPosition is called. + const auto& margin = GetMargin(); + mAnchorType = MenuPopupAnchorType_Point; + mScreenRect.x = aRects.mUsedRect.x - margin.left; + mScreenRect.y = aRects.mUsedRect.y - margin.top; + } + + // For anchored popups that shouldn't follow the anchor, fix the original + // anchor rect. + if (IsAnchored() && !ShouldFollowAnchor() && !mUsedScreenRect.IsEmpty() && + mAnchorType != MenuPopupAnchorType_Rect) { + mAnchorType = MenuPopupAnchorType_Rect; + mScreenRect = aRects.mUntransformedAnchorRect; + } + + // NOTE(emilio): This call below is kind of a workaround, but we need to do + // this here because some position changes don't go through the + // view system -> popup manager, like: + // + // https://searchfox.org/mozilla-central/rev/477950cf9ca9c9bb5ff6f34e0d0f6ca4718ea798/widget/gtk/nsWindow.cpp#3847 + // + // So this might be the last chance we have to set the remote browser's + // position. + // + // Ultimately this probably wants to get fixed in the widget size of things, + // but given this is worst-case a redundant DOM traversal, and that popups + // usually don't have all that much content, this is probably an ok + // workaround. + WidgetPositionOrSizeDidChange(); +} + +void nsMenuPopupFrame::WidgetPositionOrSizeDidChange() { + // In the case this popup has remote contents having OOP iframes, it's + // possible that OOP iframe's nsSubDocumentFrame has been already reflowed + // thus, we will never have a chance to tell this parent browser's position + // update to the OOP documents without notifying it explicitly. + if (!HasRemoteContent()) { + return; + } + for (nsIContent* content = mContent->GetFirstChild(); content; + content = content->GetNextNode(mContent)) { + if (content->IsXULElement(nsGkAtoms::browser) && + content->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::remote, + nsGkAtoms::_true, eIgnoreCase)) { + if (auto* browserParent = dom::BrowserParent::GetFrom(content)) { + browserParent->NotifyPositionUpdatedForContentsInPopup(); + } + } + } +} + +Maybe<nsRect> nsMenuPopupFrame::GetConstraintRect( + const nsRect& aAnchorRect, const nsRect& aRootScreenRect, + PopupLevel aPopupLevel) const { + const nsPresContext* pc = PresContext(); + const int32_t a2d = PresContext()->AppUnitsPerDevPixel(); + Maybe<nsRect> result; + + auto AddConstraint = [&result](const nsRect& aConstraint) { + if (result) { + *result = result->Intersect(aConstraint); + } else { + result.emplace(aConstraint); + } + }; + + // Determine the available screen space. It will be reduced by the OS chrome + // such as menubars. It addition, for content shells, it will be the area of + // the content rather than the screen. + // In Wayland we can't use the screen rect because we can't know absolute + // window position. + if (!IS_WAYLAND_DISPLAY()) { + const DesktopToLayoutDeviceScale scale = + pc->DeviceContext()->GetDesktopToDeviceScale(); + // For content shells, get the screen where the root frame is located. This + // is because we need to constrain the content to this content area, so we + // should use the same screen. Otherwise, use the screen where the anchor is + // located. + const nsRect& rect = mInContentShell ? aRootScreenRect : aAnchorRect; + auto desktopRect = DesktopIntRect::RoundOut( + LayoutDeviceRect::FromAppUnits(rect, a2d) / scale); + desktopRect.width = std::max(1, desktopRect.width); + desktopRect.height = std::max(1, desktopRect.height); + + RefPtr<nsIScreen> screen = + widget::ScreenManager::GetSingleton().ScreenForRect(desktopRect); + MOZ_ASSERT(screen, "We always fall back to the primary screen"); + // Non-top-level popups (which will always be panels) should never overlap + // the OS bar. + const bool canOverlapOSBar = + aPopupLevel == PopupLevel::Top && + LookAndFeel::GetInt(LookAndFeel::IntID::MenusCanOverlapOSBar) && + !mInContentShell; + // Get the total screen area if the popup is allowed to overlap it. + const auto screenRect = + canOverlapOSBar ? screen->GetRect() : screen->GetAvailRect(); + AddConstraint(LayoutDeviceRect::ToAppUnits(screenRect, a2d)); + } + + if (mInContentShell) { + // For content shells, clip to the client area rather than the screen area + AddConstraint(aRootScreenRect); + } else if (!mOverrideConstraintRect.IsEmpty()) { + AddConstraint(mOverrideConstraintRect); + // This is currently only used for <select> elements where we want to + // constrain vertically to the screen but not horizontally, so do the + // intersection and then reset the horizontal values. + // + // FIXME(emilio): This doesn't make any sense to me... + result->x = mOverrideConstraintRect.x; + result->width = mOverrideConstraintRect.width; + } + + // Expand the allowable screen rect by the input margin (which can't be + // interacted with). + if (result) { + const nscoord inputMargin = + StyleUIReset()->mMozWindowInputRegionMargin.ToAppUnits(); + result->Inflate(inputMargin); + } + return result; +} + +ConsumeOutsideClicksResult nsMenuPopupFrame::ConsumeOutsideClicks() { + if (mContent->AsElement()->AttrValueIs(kNameSpaceID_None, + nsGkAtoms::consumeoutsideclicks, + nsGkAtoms::_true, eCaseMatters)) { + return ConsumeOutsideClicks_True; + } + if (mContent->AsElement()->AttrValueIs(kNameSpaceID_None, + nsGkAtoms::consumeoutsideclicks, + nsGkAtoms::_false, eCaseMatters)) { + return ConsumeOutsideClicks_ParentOnly; + } + if (mContent->AsElement()->AttrValueIs(kNameSpaceID_None, + nsGkAtoms::consumeoutsideclicks, + nsGkAtoms::never, eCaseMatters)) { + return ConsumeOutsideClicks_Never; + } + + nsCOMPtr<nsIContent> parentContent = mContent->GetParent(); + if (parentContent) { + dom::NodeInfo* ni = parentContent->NodeInfo(); + if (ni->Equals(nsGkAtoms::menulist, kNameSpaceID_XUL)) { + return ConsumeOutsideClicks_True; // Consume outside clicks for combo + // boxes on all platforms + } +#if defined(XP_WIN) + // Don't consume outside clicks for menus in Windows + if (ni->Equals(nsGkAtoms::menu, kNameSpaceID_XUL) || + ni->Equals(nsGkAtoms::popupset, kNameSpaceID_XUL) || + ((ni->Equals(nsGkAtoms::button, kNameSpaceID_XUL) || + ni->Equals(nsGkAtoms::toolbarbutton, kNameSpaceID_XUL)) && + parentContent->AsElement()->AttrValueIs( + kNameSpaceID_None, nsGkAtoms::type, nsGkAtoms::menu, + eCaseMatters))) { + return ConsumeOutsideClicks_Never; + } +#endif + } + + return ConsumeOutsideClicks_True; +} + +static nsIScrollableFrame* DoGetScrollFrame(const nsIFrame* aFrame) { + if (const nsIScrollableFrame* sf = do_QueryFrame(aFrame)) { + return const_cast<nsIScrollableFrame*>(sf); + } + for (nsIFrame* childFrame : aFrame->PrincipalChildList()) { + if (auto* sf = DoGetScrollFrame(childFrame)) { + return sf; + } + } + return nullptr; +} + +// XXXroc this is megalame. Fossicking around for a frame of the right +// type is a recipe for disaster in the long term. +nsIScrollableFrame* nsMenuPopupFrame::GetScrollFrame() const { + return DoGetScrollFrame(this); +} + +void nsMenuPopupFrame::ChangeByPage(bool aIsUp) { + // Only scroll by page within menulists. + if (!IsMenuList()) { + return; + } + + nsIScrollableFrame* scrollframe = GetScrollFrame(); + + RefPtr popup = &PopupElement(); + XULButtonElement* currentMenu = popup->GetActiveMenuChild(); + XULButtonElement* newMenu = nullptr; + if (!currentMenu) { + // If there is no current menu item, get the first item. When moving up, + // just use this as the newMenu and leave currentMenu null so that no check + // for a later element is performed. When moving down, set currentMenu so + // that we look for one page down from the first item. + newMenu = popup->GetFirstMenuItem(); + if (!aIsUp) { + currentMenu = newMenu; + } + } + + if (currentMenu && currentMenu->GetPrimaryFrame()) { + const nscoord scrollHeight = + scrollframe ? scrollframe->GetScrollPortRect().height : mRect.height; + const nsRect currentRect = currentMenu->GetPrimaryFrame()->GetRect(); + const XULButtonElement* startMenu = currentMenu; + + // Get the position of the current item and add or subtract one popup's + // height to or from it. + const nscoord targetPos = aIsUp ? currentRect.YMost() - scrollHeight + : currentRect.y + scrollHeight; + // Look for the next child which is just past the target position. This + // child will need to be selected. + for (; currentMenu; + currentMenu = aIsUp ? popup->GetPrevMenuItemFrom(*currentMenu) + : popup->GetNextMenuItemFrom(*currentMenu)) { + if (!currentMenu->GetPrimaryFrame()) { + continue; + } + const nsRect curRect = currentMenu->GetPrimaryFrame()->GetRect(); + const nscoord curPos = aIsUp ? curRect.y : curRect.YMost(); + // If the right position was found, break out. Otherwise, look for another + // item. + if (aIsUp ? (curPos < targetPos) : (curPos > targetPos)) { + if (!newMenu || newMenu == startMenu) { + newMenu = currentMenu; + } + break; + } + + // Assign this item to newMenu. This item will be selected in case we + // don't find any more. + newMenu = currentMenu; + } + } + + // Select the new menuitem. + if (RefPtr newMenuRef = newMenu) { + popup->SetActiveMenuChild(newMenuRef); + } +} + +dom::XULPopupElement& nsMenuPopupFrame::PopupElement() const { + auto* popup = dom::XULPopupElement::FromNode(GetContent()); + MOZ_DIAGNOSTIC_ASSERT(popup); + return *popup; +} + +XULButtonElement* nsMenuPopupFrame::GetCurrentMenuItem() const { + return PopupElement().GetActiveMenuChild(); +} + +nsIFrame* nsMenuPopupFrame::GetCurrentMenuItemFrame() const { + auto* child = GetCurrentMenuItem(); + return child ? child->GetPrimaryFrame() : nullptr; +} + +void nsMenuPopupFrame::HandleEnterKeyPress(WidgetEvent& aEvent) { + mIncrementalString.Truncate(); + RefPtr popup = &PopupElement(); + popup->HandleEnterKeyPress(aEvent); +} + +XULButtonElement* nsMenuPopupFrame::FindMenuWithShortcut( + mozilla::dom::KeyboardEvent& aKeyEvent, bool& aDoAction) { + uint32_t charCode = aKeyEvent.CharCode(); + uint32_t keyCode = aKeyEvent.KeyCode(); + + aDoAction = false; + + // Enumerate over our list of frames. + const bool isMenu = !IsMenuList(); + TimeStamp keyTime = aKeyEvent.WidgetEventPtr()->mTimeStamp; + if (charCode == 0) { + if (keyCode == dom::KeyboardEvent_Binding::DOM_VK_BACK_SPACE) { + if (!isMenu && !mIncrementalString.IsEmpty()) { + mIncrementalString.SetLength(mIncrementalString.Length() - 1); + return nullptr; + } +#ifdef XP_WIN + if (nsCOMPtr<nsISound> sound = do_GetService("@mozilla.org/sound;1")) { + sound->Beep(); + } +#endif // #ifdef XP_WIN + } + return nullptr; + } + char16_t uniChar = ToLowerCase(static_cast<char16_t>(charCode)); + if (isMenu) { + // Menu supports only first-letter navigation + mIncrementalString = uniChar; + } else if (IsWithinIncrementalTime(keyTime)) { + mIncrementalString.Append(uniChar); + } else { + // Interval too long, treat as new typing + mIncrementalString = uniChar; + } + + // See bug 188199 & 192346, if all letters in incremental string are same, + // just try to match the first one + nsAutoString incrementalString(mIncrementalString); + uint32_t charIndex = 1, stringLength = incrementalString.Length(); + while (charIndex < stringLength && + incrementalString[charIndex] == incrementalString[charIndex - 1]) { + charIndex++; + } + if (charIndex == stringLength) { + incrementalString.Truncate(1); + stringLength = 1; + } + + sLastKeyTime = keyTime; + + auto* item = + PopupElement().FindMenuWithShortcut(incrementalString, aDoAction); + if (item) { + return item; + } + + // If we don't match anything, rollback the last typing + mIncrementalString.SetLength(mIncrementalString.Length() - 1); + + // didn't find a matching menu item +#ifdef XP_WIN + // behavior on Windows - this item is in a menu popup off of the + // menu bar, so beep and do nothing else + if (isMenu) { + if (nsCOMPtr<nsISound> sound = do_GetService("@mozilla.org/sound;1")) { + sound->Beep(); + } + } +#endif // #ifdef XP_WIN + + return nullptr; +} + +nsIWidget* nsMenuPopupFrame::GetWidget() const { + return mView ? mView->GetWidget() : nullptr; +} + +// helpers ///////////////////////////////////////////////////////////// + +nsresult nsMenuPopupFrame::AttributeChanged(int32_t aNameSpaceID, + nsAtom* aAttribute, + int32_t aModType) + +{ + nsresult rv = + nsBlockFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType); + + if (aAttribute == nsGkAtoms::left || aAttribute == nsGkAtoms::top) { + MoveToAttributePosition(); + } + + if (aAttribute == nsGkAtoms::remote) { + // When the remote attribute changes, we need to create a new widget to + // ensure that it has the correct compositor and transparency settings to + // match the new value. + PrepareWidget(true); + } + + if (aAttribute == nsGkAtoms::followanchor) { + if (nsXULPopupManager* pm = nsXULPopupManager::GetInstance()) { + pm->UpdateFollowAnchor(this); + } + } + + if (aAttribute == nsGkAtoms::label) { + // set the label for the titlebar + nsView* view = GetView(); + if (view) { + nsIWidget* widget = view->GetWidget(); + if (widget) { + nsAutoString title; + mContent->AsElement()->GetAttr(nsGkAtoms::label, title); + if (!title.IsEmpty()) { + widget->SetTitle(title); + } + } + } + } else if (aAttribute == nsGkAtoms::ignorekeys) { + nsXULPopupManager* pm = nsXULPopupManager::GetInstance(); + if (pm) { + nsAutoString ignorekeys; + mContent->AsElement()->GetAttr(nsGkAtoms::ignorekeys, ignorekeys); + pm->UpdateIgnoreKeys(ignorekeys.EqualsLiteral("true")); + } + } + + return rv; +} + +void nsMenuPopupFrame::MoveToAttributePosition() { + // Move the widget around when the user sets the |left| and |top| attributes. + // Note that this is not the best way to move the widget, as it results in + // lots of FE notifications and is likely to be slow as molasses. Use |moveTo| + // on the element if possible. + nsAutoString left, top; + mContent->AsElement()->GetAttr(nsGkAtoms::left, left); + mContent->AsElement()->GetAttr(nsGkAtoms::top, top); + nsresult err1, err2; + mozilla::CSSIntPoint pos(left.ToInteger(&err1), top.ToInteger(&err2)); + + if (NS_SUCCEEDED(err1) && NS_SUCCEEDED(err2)) MoveTo(pos, false); + + PresShell()->FrameNeedsReflow( + this, IntrinsicDirty::FrameAncestorsAndDescendants, NS_FRAME_IS_DIRTY); +} + +void nsMenuPopupFrame::Destroy(DestroyContext& aContext) { + // XXX: Currently we don't fire popuphidden for these popups, that seems wrong + // but alas, also pre-existing. + HidePopup(/* aDeselectMenu = */ false, ePopupClosed, + /* aFromFrameDestruction = */ true); + + if (RefPtr<nsXULPopupManager> pm = nsXULPopupManager::GetInstance()) { + pm->PopupDestroyed(this); + } + + nsBlockFrame::Destroy(aContext); +} + +nsMargin nsMenuPopupFrame::GetMargin() const { + nsMargin margin; + StyleMargin()->GetMargin(margin); + if (mIsTopLevelContextMenu) { + const CSSIntPoint offset( + LookAndFeel::GetInt(LookAndFeel::IntID::ContextMenuOffsetHorizontal), + LookAndFeel::GetInt(LookAndFeel::IntID::ContextMenuOffsetVertical)); + auto auOffset = CSSIntPoint::ToAppUnits(offset); + margin.top += auOffset.y; + margin.bottom += auOffset.y; + margin.left += auOffset.x; + margin.right += auOffset.x; + } + return margin; +} + +void nsMenuPopupFrame::MoveTo(const CSSPoint& aPos, bool aUpdateAttrs, + bool aByMoveToRect) { + nsIWidget* widget = GetWidget(); + nsPoint appUnitsPos = CSSPixel::ToAppUnits(aPos); + + // reposition the popup at the specified coordinates. Don't clear the anchor + // and position, because the popup can be reset to its anchor position by + // using (-1, -1) as coordinates. + // + // Subtract off the margin as it will be added to the position when + // SetPopupPosition is called. + { + nsMargin margin = GetMargin(); + if (mIsContextMenu && IsDirectionRTL()) { + appUnitsPos.x += margin.right + mRect.Width(); + } else { + appUnitsPos.x -= margin.left; + } + appUnitsPos.y -= margin.top; + } + + if (mScreenRect.TopLeft() == appUnitsPos && + (!widget || widget->GetClientOffset() == mLastClientOffset)) { + return; + } + + mPositionedByMoveToRect = aByMoveToRect; + mScreenRect.MoveTo(appUnitsPos); + if (mAnchorType == MenuPopupAnchorType_Rect) { + // This ensures that the anchor width is still honored, to prevent it from + // changing spuriously. + mScreenRect.height = 0; + // But we still need to make sure that our top left position ends up in + // appUnitsPos. + mPopupAlignment = POPUPALIGNMENT_TOPLEFT; + mPopupAnchor = POPUPALIGNMENT_BOTTOMLEFT; + mXPos = mYPos = 0; + } else { + mAnchorType = MenuPopupAnchorType_Point; + } + + SetPopupPosition(true); + + RefPtr<Element> popup = mContent->AsElement(); + if (aUpdateAttrs && + (popup->HasAttr(nsGkAtoms::left) || popup->HasAttr(nsGkAtoms::top))) { + nsAutoString left, top; + left.AppendInt(RoundedToInt(aPos).x); + top.AppendInt(RoundedToInt(aPos).y); + popup->SetAttr(kNameSpaceID_None, nsGkAtoms::left, left, false); + popup->SetAttr(kNameSpaceID_None, nsGkAtoms::top, top, false); + } +} + +void nsMenuPopupFrame::MoveToAnchor(nsIContent* aAnchorContent, + const nsAString& aPosition, int32_t aXPos, + int32_t aYPos, bool aAttributesOverride) { + NS_ASSERTION(IsVisible(), "popup must be visible to move it"); + + nsPopupState oldstate = mPopupState; + InitializePopup(aAnchorContent, mTriggerContent, aPosition, aXPos, aYPos, + MenuPopupAnchorType_Node, aAttributesOverride); + // InitializePopup changed the state so reset it. + mPopupState = oldstate; + + // Pass false here so that flipping and adjusting to fit on the screen happen. + SetPopupPosition(false); +} + +int8_t nsMenuPopupFrame::GetAlignmentPosition() const { + // The code below handles most cases of alignment, anchor and position values. + // Those that are not handled just return POPUPPOSITION_UNKNOWN. + + if (mPosition == POPUPPOSITION_OVERLAP || + mPosition == POPUPPOSITION_AFTERPOINTER || + mPosition == POPUPPOSITION_SELECTION) { + return mPosition; + } + + int8_t position = mPosition; + + if (position == POPUPPOSITION_UNKNOWN) { + switch (mPopupAnchor) { + case POPUPALIGNMENT_BOTTOMRIGHT: + case POPUPALIGNMENT_BOTTOMLEFT: + case POPUPALIGNMENT_BOTTOMCENTER: + position = mPopupAlignment == POPUPALIGNMENT_TOPRIGHT + ? POPUPPOSITION_AFTEREND + : POPUPPOSITION_AFTERSTART; + break; + case POPUPALIGNMENT_TOPRIGHT: + case POPUPALIGNMENT_TOPLEFT: + case POPUPALIGNMENT_TOPCENTER: + position = mPopupAlignment == POPUPALIGNMENT_BOTTOMRIGHT + ? POPUPPOSITION_BEFOREEND + : POPUPPOSITION_BEFORESTART; + break; + case POPUPALIGNMENT_LEFTCENTER: + position = mPopupAlignment == POPUPALIGNMENT_BOTTOMRIGHT + ? POPUPPOSITION_STARTAFTER + : POPUPPOSITION_STARTBEFORE; + break; + case POPUPALIGNMENT_RIGHTCENTER: + position = mPopupAlignment == POPUPALIGNMENT_BOTTOMLEFT + ? POPUPPOSITION_ENDAFTER + : POPUPPOSITION_ENDBEFORE; + break; + default: + break; + } + } + + if (mHFlip) { + position = POPUPPOSITION_HFLIP(position); + } + + if (mVFlip) { + position = POPUPPOSITION_VFLIP(position); + } + + return position; +} + +/** + * KEEP THIS IN SYNC WITH nsIFrame::CreateView + * as much as possible. Until we get rid of views finally... + */ +void nsMenuPopupFrame::CreatePopupView() { + if (HasView()) { + return; + } + + nsViewManager* viewManager = PresContext()->GetPresShell()->GetViewManager(); + NS_ASSERTION(nullptr != viewManager, "null view manager"); + + // Create a view + nsView* parentView = viewManager->GetRootView(); + auto visibility = ViewVisibility::Hide; + + NS_ASSERTION(parentView, "no parent view"); + + // Create a view + nsView* view = viewManager->CreateView(GetRect(), parentView, visibility); + auto zIndex = ZIndex(); + viewManager->SetViewZIndex(view, zIndex.isNothing(), zIndex.valueOr(0)); + // XXX put view last in document order until we can do better + viewManager->InsertChild(parentView, view, nullptr, true); + + // Remember our view + SetView(view); + + NS_FRAME_LOG( + NS_FRAME_TRACE_CALLS, + ("nsMenuPopupFrame::CreatePopupView: frame=%p view=%p", this, view)); +} + +bool nsMenuPopupFrame::ShouldFollowAnchor() const { + if (mAnchorType != MenuPopupAnchorType_Node || !mAnchorContent) { + return false; + } + + // Follow anchor mode is used when followanchor="true" is set or for arrow + // panels. + if (mContent->AsElement()->AttrValueIs(kNameSpaceID_None, + nsGkAtoms::followanchor, + nsGkAtoms::_true, eCaseMatters)) { + return true; + } + + if (mContent->AsElement()->AttrValueIs(kNameSpaceID_None, + nsGkAtoms::followanchor, + nsGkAtoms::_false, eCaseMatters)) { + return false; + } + + return mPopupType == PopupType::Panel && + mContent->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type, + nsGkAtoms::arrow, eCaseMatters); +} + +bool nsMenuPopupFrame::ShouldFollowAnchor(nsRect& aRect) { + if (!ShouldFollowAnchor()) { + return false; + } + + if (nsIFrame* anchorFrame = GetAnchorFrame()) { + if (nsPresContext* rootPresContext = PresContext()->GetRootPresContext()) { + aRect = ComputeAnchorRect(rootPresContext, anchorFrame); + } + } + + return true; +} + +bool nsMenuPopupFrame::IsDirectionRTL() const { + const nsIFrame* anchor = GetAnchorFrame(); + const nsIFrame* f = anchor ? anchor : this; + return f->StyleVisibility()->mDirection == StyleDirection::Rtl; +} + +nsIFrame* nsMenuPopupFrame::GetAnchorFrame() const { + nsIContent* anchor = mAnchorContent; + if (!anchor) { + return nullptr; + } + return MaybeDelegatedAnchorFrame(anchor->GetPrimaryFrame()); +} + +void nsMenuPopupFrame::CheckForAnchorChange(nsRect& aRect) { + // Don't update if the popup isn't visible or we shouldn't be following the + // anchor. + if (!IsVisible() || !ShouldFollowAnchor()) { + return; + } + + bool shouldHide = false; + + nsPresContext* rootPresContext = PresContext()->GetRootPresContext(); + + // If the frame for the anchor has gone away, hide the popup. + nsIFrame* anchor = GetAnchorFrame(); + if (!anchor || !rootPresContext) { + shouldHide = true; + } else if (!anchor->IsVisibleConsideringAncestors( + VISIBILITY_CROSS_CHROME_CONTENT_BOUNDARY)) { + // If the anchor is now inside something that is invisible, hide the popup. + shouldHide = true; + } else { + // If the anchor is now inside a hidden parent popup, hide the popup. + nsIFrame* frame = anchor; + while (frame) { + nsMenuPopupFrame* popup = do_QueryFrame(frame); + if (popup && popup->PopupState() != ePopupShown) { + shouldHide = true; + break; + } + + frame = frame->GetParent(); + } + } + + if (shouldHide) { + nsXULPopupManager* pm = nsXULPopupManager::GetInstance(); + if (pm) { + // As the caller will be iterating over the open popups, hide + // asyncronously. + pm->HidePopup(mContent->AsElement(), + {HidePopupOption::DeselectMenu, HidePopupOption::Async}); + } + + return; + } + + nsRect anchorRect = ComputeAnchorRect(rootPresContext, anchor); + + // If the rectangles are different, move the popup. + if (!anchorRect.IsEqualEdges(aRect)) { + aRect = anchorRect; + SetPopupPosition(true); + } +} |