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gecko-dev/layout/xul/nsMenuFrame.cpp

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/* -*- 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 "nsGkAtoms.h"
#include "nsHTMLParts.h"
#include "nsMenuFrame.h"
#include "nsBoxFrame.h"
#include "nsIContent.h"
#include "nsAtom.h"
#include "nsPresContext.h"
#include "mozilla/ComputedStyle.h"
#include "nsCSSRendering.h"
#include "nsNameSpaceManager.h"
#include "nsMenuPopupFrame.h"
#include "nsMenuBarFrame.h"
#include "mozilla/dom/Document.h"
#include "nsBoxLayoutState.h"
#include "nsIScrollableFrame.h"
#include "nsCSSFrameConstructor.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsUnicharUtils.h"
#include "nsIStringBundle.h"
#include "nsContentUtils.h"
#include "nsDisplayList.h"
#include "nsIReflowCallback.h"
#include "nsISound.h"
#include "mozilla/Attributes.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/Likely.h"
#include "mozilla/LookAndFeel.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/Preferences.h"
#include "mozilla/PresShell.h"
#include "mozilla/Services.h"
#include "mozilla/TextEvents.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/UserActivation.h"
#include <algorithm>
using namespace mozilla;
#define NS_MENU_POPUP_LIST_INDEX 0
#if defined(XP_WIN)
# define NSCONTEXTMENUISMOUSEUP 1
#endif
NS_DECLARE_FRAME_PROPERTY_FRAMELIST(PopupListProperty)
// This global flag indicates that a menu just opened or closed and is used
// to ignore the mousemove and mouseup events that would fire on the menu after
// the mousedown occurred.
static int32_t gMenuJustOpenedOrClosed = false;
const int32_t kBlinkDelay = 67; // milliseconds
// this class is used for dispatching menu activation events asynchronously.
class nsMenuActivateEvent : public Runnable {
public:
nsMenuActivateEvent(Element* aMenu, nsPresContext* aPresContext,
bool aIsActivate)
: mozilla::Runnable("nsMenuActivateEvent"),
mMenu(aMenu),
mPresContext(aPresContext),
mIsActivate(aIsActivate) {}
NS_IMETHOD Run() override {
nsAutoString domEventToFire;
if (mIsActivate) {
// Highlight the menu.
mMenu->SetAttr(kNameSpaceID_None, nsGkAtoms::menuactive,
NS_LITERAL_STRING("true"), true);
// The menuactivated event is used by accessibility to track the user's
// movements through menus
domEventToFire.AssignLiteral("DOMMenuItemActive");
} else {
// Unhighlight the menu.
mMenu->UnsetAttr(kNameSpaceID_None, nsGkAtoms::menuactive, true);
domEventToFire.AssignLiteral("DOMMenuItemInactive");
}
RefPtr<dom::Event> event = NS_NewDOMEvent(mMenu, mPresContext, nullptr);
event->InitEvent(domEventToFire, true, true);
event->SetTrusted(true);
EventDispatcher::DispatchDOMEvent(mMenu, nullptr, event, mPresContext,
nullptr);
return NS_OK;
}
private:
RefPtr<Element> mMenu;
RefPtr<nsPresContext> mPresContext;
bool mIsActivate;
};
class nsMenuAttributeChangedEvent : public Runnable {
public:
nsMenuAttributeChangedEvent(nsIFrame* aFrame, nsAtom* aAttr)
: mozilla::Runnable("nsMenuAttributeChangedEvent"),
mFrame(aFrame),
mAttr(aAttr) {}
NS_IMETHOD Run() override {
nsMenuFrame* frame = static_cast<nsMenuFrame*>(mFrame.GetFrame());
NS_ENSURE_STATE(frame);
if (mAttr == nsGkAtoms::checked) {
frame->UpdateMenuSpecialState();
} else if (mAttr == nsGkAtoms::acceltext) {
// someone reset the accelText attribute,
// so clear the bit that says *we* set it
frame->RemoveStateBits(NS_STATE_ACCELTEXT_IS_DERIVED);
frame->BuildAcceleratorText(true);
} else if (mAttr == nsGkAtoms::key) {
frame->BuildAcceleratorText(true);
} else if (mAttr == nsGkAtoms::type || mAttr == nsGkAtoms::name) {
frame->UpdateMenuType();
}
return NS_OK;
}
protected:
WeakFrame mFrame;
RefPtr<nsAtom> mAttr;
};
//
// NS_NewMenuFrame and NS_NewMenuItemFrame
//
// Wrappers for creating a new menu popup container
//
nsIFrame* NS_NewMenuFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
nsMenuFrame* it =
new (aPresShell) nsMenuFrame(aStyle, aPresShell->GetPresContext());
it->SetIsMenu(true);
return it;
}
nsIFrame* NS_NewMenuItemFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
nsMenuFrame* it =
new (aPresShell) nsMenuFrame(aStyle, aPresShell->GetPresContext());
it->SetIsMenu(false);
return it;
}
NS_IMPL_FRAMEARENA_HELPERS(nsMenuFrame)
NS_QUERYFRAME_HEAD(nsMenuFrame)
NS_QUERYFRAME_ENTRY(nsMenuFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsBoxFrame)
nsMenuFrame::nsMenuFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
: nsBoxFrame(aStyle, aPresContext, kClassID),
mIsMenu(false),
mChecked(false),
mIgnoreAccelTextChange(false),
mReflowCallbackPosted(false),
mType(eMenuType_Normal),
mBlinkState(0) {}
nsMenuParent* nsMenuFrame::GetMenuParent() const {
nsContainerFrame* parent = GetParent();
for (; parent; parent = parent->GetParent()) {
nsMenuPopupFrame* popup = do_QueryFrame(parent);
if (popup) {
return popup;
}
nsMenuBarFrame* menubar = do_QueryFrame(parent);
if (menubar) {
return menubar;
}
}
return nullptr;
}
bool nsMenuFrame::ReflowFinished() {
mReflowCallbackPosted = false;
UpdateMenuType();
return true;
}
void nsMenuFrame::ReflowCallbackCanceled() { mReflowCallbackPosted = false; }
void nsMenuFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
nsBoxFrame::Init(aContent, aParent, aPrevInFlow);
// Set up a mediator which can be used for callbacks on this frame.
mTimerMediator = new nsMenuTimerMediator(this);
BuildAcceleratorText(false);
if (!mReflowCallbackPosted) {
mReflowCallbackPosted = true;
PresShell()->PostReflowCallback(this);
}
}
const nsFrameList& nsMenuFrame::GetChildList(ChildListID aListID) const {
if (kPopupList == aListID) {
nsFrameList* list = GetPopupList();
return list ? *list : nsFrameList::EmptyList();
}
return nsBoxFrame::GetChildList(aListID);
}
void nsMenuFrame::GetChildLists(nsTArray<ChildList>* aLists) const {
nsBoxFrame::GetChildLists(aLists);
nsFrameList* list = GetPopupList();
if (list) {
list->AppendIfNonempty(aLists, kPopupList);
}
}
nsMenuPopupFrame* nsMenuFrame::GetPopup() {
nsFrameList* popupList = GetPopupList();
return popupList ? static_cast<nsMenuPopupFrame*>(popupList->FirstChild())
: nullptr;
}
nsFrameList* nsMenuFrame::GetPopupList() const {
if (!HasPopup()) {
return nullptr;
}
nsFrameList* prop = GetProperty(PopupListProperty());
NS_ASSERTION(
prop && prop->GetLength() == 1 && prop->FirstChild()->IsMenuPopupFrame(),
"popup list should have exactly one nsMenuPopupFrame");
return prop;
}
void nsMenuFrame::DestroyPopupList() {
NS_ASSERTION(HasPopup(), "huh?");
nsFrameList* prop = TakeProperty(PopupListProperty());
NS_ASSERTION(prop && prop->IsEmpty(),
"popup list must exist and be empty when destroying");
RemoveStateBits(NS_STATE_MENU_HAS_POPUP_LIST);
prop->Delete(PresShell());
}
void nsMenuFrame::SetPopupFrame(nsFrameList& aFrameList) {
for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) {
nsMenuPopupFrame* popupFrame = do_QueryFrame(e.get());
if (popupFrame) {
// Remove the frame from the list and store it in a nsFrameList* property.
aFrameList.RemoveFrame(popupFrame);
nsFrameList* popupList =
new (PresShell()) nsFrameList(popupFrame, popupFrame);
SetProperty(PopupListProperty(), popupList);
AddStateBits(NS_STATE_MENU_HAS_POPUP_LIST);
break;
}
}
}
void nsMenuFrame::SetInitialChildList(ChildListID aListID,
nsFrameList& aChildList) {
if (aListID == kPrincipalList || aListID == kPopupList) {
NS_ASSERTION(!HasPopup(), "SetInitialChildList called twice?");
#ifdef DEBUG
for (nsIFrame* f : aChildList) {
MOZ_ASSERT(f->GetParent() == this, "Unexpected parent");
}
#endif
SetPopupFrame(aChildList);
}
nsBoxFrame::SetInitialChildList(aListID, aChildList);
}
void nsMenuFrame::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
if (mReflowCallbackPosted) {
PresShell()->CancelReflowCallback(this);
mReflowCallbackPosted = false;
}
// Kill our timer if one is active. This is not strictly necessary as
// the pointer to this frame will be cleared from the mediator, but
// this is done for added safety.
if (mOpenTimer) {
mOpenTimer->Cancel();
}
StopBlinking();
// Null out the pointer to this frame in the mediator wrapper so that it
// doesn't try to interact with a deallocated frame.
mTimerMediator->ClearFrame();
// if the menu content is just being hidden, it may be made visible again
// later, so make sure to clear the highlighting.
mContent->AsElement()->UnsetAttr(kNameSpaceID_None, nsGkAtoms::menuactive,
false);
// are we our menu parent's current menu item?
nsMenuParent* menuParent = GetMenuParent();
if (menuParent && menuParent->GetCurrentMenuItem() == this) {
// yes; tell it that we're going away
menuParent->CurrentMenuIsBeingDestroyed();
}
nsFrameList* popupList = GetPopupList();
if (popupList) {
popupList->DestroyFramesFrom(aDestructRoot, aPostDestroyData);
DestroyPopupList();
}
nsBoxFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
void nsMenuFrame::BuildDisplayListForChildren(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
if (!aBuilder->IsForEventDelivery()) {
nsBoxFrame::BuildDisplayListForChildren(aBuilder, aLists);
return;
}
nsDisplayListCollection set(aBuilder);
nsBoxFrame::BuildDisplayListForChildren(aBuilder, set);
WrapListsInRedirector(aBuilder, set, aLists);
}
nsresult nsMenuFrame::HandleEvent(nsPresContext* aPresContext,
WidgetGUIEvent* aEvent,
nsEventStatus* aEventStatus) {
NS_ENSURE_ARG_POINTER(aEventStatus);
if (nsEventStatus_eConsumeNoDefault == *aEventStatus) {
return NS_OK;
}
nsMenuParent* menuParent = GetMenuParent();
if (menuParent && menuParent->IsMenuLocked()) {
return NS_OK;
}
AutoWeakFrame weakFrame(this);
if (*aEventStatus == nsEventStatus_eIgnore)
*aEventStatus = nsEventStatus_eConsumeDoDefault;
// If a menu just opened, ignore the mouseup event that might occur after a
// the mousedown event that opened it. However, if a different mousedown
// event occurs, just clear this flag.
if (gMenuJustOpenedOrClosed) {
if (aEvent->mMessage == eMouseDown) {
gMenuJustOpenedOrClosed = false;
} else if (aEvent->mMessage == eMouseUp) {
return NS_OK;
}
}
bool onmenu = IsOnMenu();
if (aEvent->mMessage == eKeyPress && !IsDisabled()) {
WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
uint32_t keyCode = keyEvent->mKeyCode;
#ifdef XP_MACOSX
// On mac, open menulist on either up/down arrow or space (w/o Cmd pressed)
if (!IsOpen() && ((keyEvent->mCharCode == ' ' && !keyEvent->IsMeta()) ||
(keyCode == NS_VK_UP || keyCode == NS_VK_DOWN))) {
// When pressing space, don't open the menu if performing an incremental
// search.
if (keyEvent->mCharCode != ' ' ||
!nsMenuPopupFrame::IsWithinIncrementalTime(keyEvent->mTime)) {
*aEventStatus = nsEventStatus_eConsumeNoDefault;
OpenMenu(false);
}
}
#else
// On other platforms, toggle menulist on unmodified F4 or Alt arrow
if ((keyCode == NS_VK_F4 && !keyEvent->IsAlt()) ||
((keyCode == NS_VK_UP || keyCode == NS_VK_DOWN) && keyEvent->IsAlt())) {
*aEventStatus = nsEventStatus_eConsumeNoDefault;
ToggleMenuState();
}
#endif
} else if (aEvent->mMessage == eMouseDown &&
aEvent->AsMouseEvent()->mButton == MouseButton::eLeft &&
!IsDisabled() && IsMenu()) {
// The menu item was selected. Bring up the menu.
// We have children.
// Don't prevent the default action here, since that will also cancel
// potential drag starts.
if (!menuParent || menuParent->IsMenuBar()) {
ToggleMenuState();
} else {
if (!IsOpen()) {
menuParent->ChangeMenuItem(this, false, false);
OpenMenu(false);
}
}
} else if (
#ifndef NSCONTEXTMENUISMOUSEUP
(aEvent->mMessage == eMouseUp &&
aEvent->AsMouseEvent()->mButton == MouseButton::eRight) &&
#else
aEvent->mMessage == eContextMenu &&
#endif
onmenu && !IsMenu() && !IsDisabled()) {
// if this menu is a context menu it accepts right-clicks...fire away!
// Make sure we cancel default processing of the context menu event so
// that it doesn't bubble and get seen again by the popuplistener and show
// another context menu.
//
// Furthermore (there's always more, isn't there?), on some platforms (win32
// being one of them) we get the context menu event on a mouse up while
// on others we get it on a mouse down. For the ones where we get it on a
// mouse down, we must continue listening for the right button up event to
// dismiss the menu.
if (menuParent->IsContextMenu()) {
*aEventStatus = nsEventStatus_eConsumeNoDefault;
Execute(aEvent);
}
} else if (aEvent->mMessage == eMouseUp &&
aEvent->AsMouseEvent()->mButton == MouseButton::eLeft &&
!IsMenu() && !IsDisabled()) {
// Execute the execute event handler.
*aEventStatus = nsEventStatus_eConsumeNoDefault;
Execute(aEvent);
} else if (aEvent->mMessage == eMouseOut) {
// Kill our timer if one is active.
if (mOpenTimer) {
mOpenTimer->Cancel();
mOpenTimer = nullptr;
}
// Deactivate the menu.
if (menuParent) {
bool onmenubar = menuParent->IsMenuBar();
if (!(onmenubar && menuParent->IsActive())) {
if (IsMenu() && !onmenubar && IsOpen()) {
// Submenus don't get closed up immediately.
} else if (this == menuParent->GetCurrentMenuItem()
#ifdef XP_WIN
&& !IsParentMenuList()
#endif
) {
menuParent->ChangeMenuItem(nullptr, false, false);
}
}
}
} else if (aEvent->mMessage == eMouseMove &&
(onmenu || (menuParent && menuParent->IsMenuBar()))) {
if (gMenuJustOpenedOrClosed) {
gMenuJustOpenedOrClosed = false;
return NS_OK;
}
if (IsDisabled() && IsParentMenuList()) {
return NS_OK;
}
// Let the menu parent know we're the new item.
menuParent->ChangeMenuItem(this, false, false);
NS_ENSURE_TRUE(weakFrame.IsAlive(), NS_OK);
NS_ENSURE_TRUE(menuParent, NS_OK);
// we need to check if we really became the current menu
// item or not
nsMenuFrame* realCurrentItem = menuParent->GetCurrentMenuItem();
if (realCurrentItem != this) {
// we didn't (presumably because a context menu was active)
return NS_OK;
}
// Hovering over a menu in a popup should open it without a need for a
// click. A timer is used so that it doesn't open if the user moves the
// mouse quickly past the menu. This conditional check ensures that only
// menus have this behaviour
if (!IsDisabled() && IsMenu() && !IsOpen() && !mOpenTimer &&
!menuParent->IsMenuBar()) {
int32_t menuDelay =
LookAndFeel::GetInt(LookAndFeel::eIntID_SubmenuDelay, 300); // ms
// We're a menu, we're built, we're closed, and no timer has been kicked
// off.
NS_NewTimerWithCallback(
getter_AddRefs(mOpenTimer), mTimerMediator, menuDelay,
nsITimer::TYPE_ONE_SHOT,
mContent->OwnerDoc()->EventTargetFor(TaskCategory::Other));
}
}
return NS_OK;
}
void nsMenuFrame::ToggleMenuState() {
if (IsOpen())
CloseMenu(false);
else
OpenMenu(false);
}
void nsMenuFrame::PopupOpened() {
gMenuJustOpenedOrClosed = true;
AutoWeakFrame weakFrame(this);
mContent->AsElement()->SetAttr(kNameSpaceID_None, nsGkAtoms::open,
NS_LITERAL_STRING("true"), true);
if (!weakFrame.IsAlive()) return;
nsMenuParent* menuParent = GetMenuParent();
if (menuParent) {
menuParent->SetActive(true);
// Make sure the current menu which is being toggled on
// the menubar is highlighted
menuParent->SetCurrentMenuItem(this);
}
}
void nsMenuFrame::PopupClosed(bool aDeselectMenu) {
AutoWeakFrame weakFrame(this);
nsContentUtils::AddScriptRunner(
new nsUnsetAttrRunnable(mContent->AsElement(), nsGkAtoms::open));
if (!weakFrame.IsAlive()) return;
// if the popup is for a menu on a menubar, inform menubar to deactivate
nsMenuParent* menuParent = GetMenuParent();
if (menuParent && menuParent->MenuClosed()) {
if (aDeselectMenu) {
SelectMenu(false);
} else {
// We are not deselecting the parent menu while closing the popup, so send
// a DOMMenuItemActive event to the menu to indicate that the menu is
// becoming active again.
nsMenuFrame* current = menuParent->GetCurrentMenuItem();
if (current) {
// However, if the menu is a descendant on a menubar, and the menubar
// has the 'stay active' flag set, it means that the menubar is
// switching to another toplevel menu entirely (for example from Edit to
// View), so don't fire the DOMMenuItemActive event or else we'll send
// extraneous events for submenus. nsMenuBarFrame::ChangeMenuItem has
// already deselected the old menu, so it doesn't need to happen again
// here, and the new menu can be selected right away.
nsIFrame* parent = current;
while (parent) {
nsMenuBarFrame* menubar = do_QueryFrame(parent);
if (menubar && menubar->GetStayActive()) return;
parent = parent->GetParent();
}
nsCOMPtr<nsIRunnable> event = new nsMenuActivateEvent(
current->GetContent()->AsElement(), PresContext(), true);
mContent->OwnerDoc()->Dispatch(TaskCategory::Other, event.forget());
}
}
}
}
NS_IMETHODIMP
nsMenuFrame::SelectMenu(bool aActivateFlag) {
if (mContent) {
// When a menu opens a submenu, the mouse will often be moved onto a
// sibling before moving onto an item within the submenu, causing the
// parent to become deselected. We need to ensure that the parent menu
// is reselected when an item in the submenu is selected, so navigate up
// from the item to its popup, and then to the popup above that.
if (aActivateFlag) {
nsIFrame* parent = GetParent();
while (parent) {
nsMenuPopupFrame* menupopup = do_QueryFrame(parent);
if (menupopup) {
// a menu is always the direct parent of a menupopup
nsMenuFrame* menu = do_QueryFrame(menupopup->GetParent());
if (menu) {
// a popup however is not necessarily the direct parent of a menu
nsIFrame* popupParent = menu->GetParent();
while (popupParent) {
menupopup = do_QueryFrame(popupParent);
if (menupopup) {
menupopup->SetCurrentMenuItem(menu);
break;
}
popupParent = popupParent->GetParent();
}
}
break;
}
parent = parent->GetParent();
}
}
// cancel the close timer if selecting a menu within the popup to be closed
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm) {
nsMenuParent* menuParent = GetMenuParent();
pm->CancelMenuTimer(menuParent);
}
nsCOMPtr<nsIRunnable> event = new nsMenuActivateEvent(
mContent->AsElement(), PresContext(), aActivateFlag);
mContent->OwnerDoc()->Dispatch(TaskCategory::Other, event.forget());
}
return NS_OK;
}
nsresult nsMenuFrame::AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
int32_t aModType) {
if (aAttribute == nsGkAtoms::acceltext && mIgnoreAccelTextChange) {
// Reset the flag so that only one change is ignored.
mIgnoreAccelTextChange = false;
return NS_OK;
}
if (aAttribute == nsGkAtoms::checked || aAttribute == nsGkAtoms::acceltext ||
aAttribute == nsGkAtoms::key || aAttribute == nsGkAtoms::type ||
aAttribute == nsGkAtoms::name) {
nsCOMPtr<nsIRunnable> event =
new nsMenuAttributeChangedEvent(this, aAttribute);
nsContentUtils::AddScriptRunner(event);
}
return NS_OK;
}
void nsMenuFrame::OpenMenu(bool aSelectFirstItem) {
if (!mContent) return;
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm) {
pm->KillMenuTimer();
// This opens the menu asynchronously
pm->ShowMenu(mContent, aSelectFirstItem, true);
}
}
void nsMenuFrame::CloseMenu(bool aDeselectMenu) {
gMenuJustOpenedOrClosed = true;
// Close the menu asynchronously
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm && HasPopup())
pm->HidePopup(GetPopup()->GetContent(), false, aDeselectMenu, true, false);
}
bool nsMenuFrame::IsSizedToPopup(nsIContent* aContent, bool aRequireAlways) {
MOZ_ASSERT(aContent->IsElement());
nsAutoString sizedToPopup;
aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::sizetopopup,
sizedToPopup);
bool sizedToPopupSetToPref =
sizedToPopup.EqualsLiteral("pref") ||
(sizedToPopup.IsEmpty() && aContent->IsXULElement(nsGkAtoms::menulist));
return sizedToPopup.EqualsLiteral("always") ||
(!aRequireAlways && sizedToPopupSetToPref);
}
nsSize nsMenuFrame::GetXULMinSize(nsBoxLayoutState& aBoxLayoutState) {
nsSize size = nsBoxFrame::GetXULMinSize(aBoxLayoutState);
DISPLAY_MIN_SIZE(this, size);
if (IsSizedToPopup(mContent, true)) SizeToPopup(aBoxLayoutState, size);
return size;
}
NS_IMETHODIMP
nsMenuFrame::DoXULLayout(nsBoxLayoutState& aState) {
// lay us out
nsresult rv = nsBoxFrame::DoXULLayout(aState);
nsMenuPopupFrame* popupFrame = GetPopup();
if (popupFrame) {
bool sizeToPopup = IsSizedToPopup(mContent, false);
popupFrame->LayoutPopup(aState, this, sizeToPopup);
}
return rv;
}
//
// Enter
//
// Called when the user hits the <Enter>/<Return> keys or presses the
// shortcut key. If this is a leaf item, the item's action will be executed.
// In either case, do nothing if the item is disabled.
//
nsMenuFrame* nsMenuFrame::Enter(WidgetGUIEvent* aEvent) {
if (IsDisabled()) {
#ifdef XP_WIN
// behavior on Windows - close the popup chain
nsMenuParent* menuParent = GetMenuParent();
if (menuParent) {
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm) {
nsIFrame* popup = pm->GetTopPopup(ePopupTypeAny);
if (popup) pm->HidePopup(popup->GetContent(), true, true, true, false);
}
}
#endif // #ifdef XP_WIN
// this menu item was disabled - exit
return nullptr;
}
if (!IsOpen()) {
// The enter key press applies to us.
nsMenuParent* menuParent = GetMenuParent();
if (!IsMenu() && menuParent)
Execute(aEvent); // Execute our event handler
else
return this;
}
return nullptr;
}
bool nsMenuFrame::IsOpen() {
nsMenuPopupFrame* popupFrame = GetPopup();
return popupFrame && popupFrame->IsOpen();
}
bool nsMenuFrame::IsMenu() { return mIsMenu; }
bool nsMenuFrame::IsParentMenuList() {
nsMenuParent* menuParent = GetMenuParent();
if (menuParent && menuParent->IsMenu()) {
nsMenuPopupFrame* popupFrame = static_cast<nsMenuPopupFrame*>(menuParent);
return popupFrame->IsMenuList();
}
return false;
}
nsresult nsMenuFrame::Notify(nsITimer* aTimer) {
// Our timer has fired.
if (aTimer == mOpenTimer.get()) {
mOpenTimer = nullptr;
nsMenuParent* menuParent = GetMenuParent();
if (!IsOpen() && menuParent) {
// make sure we didn't open a context menu in the meantime
// (i.e. the user right-clicked while hovering over a submenu).
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm) {
if ((!pm->HasContextMenu(nullptr) || menuParent->IsContextMenu()) &&
mContent->AsElement()->AttrValueIs(
kNameSpaceID_None, nsGkAtoms::menuactive, nsGkAtoms::_true,
eCaseMatters)) {
OpenMenu(false);
}
}
}
} else if (aTimer == mBlinkTimer) {
switch (mBlinkState++) {
case 0:
NS_ASSERTION(false, "Blink timer fired while not blinking");
StopBlinking();
break;
case 1: {
// Turn the highlight back on and wait for a while before closing the
// menu.
AutoWeakFrame weakFrame(this);
mContent->AsElement()->SetAttr(kNameSpaceID_None, nsGkAtoms::menuactive,
NS_LITERAL_STRING("true"), true);
if (weakFrame.IsAlive()) {
aTimer->InitWithCallback(mTimerMediator, kBlinkDelay,
nsITimer::TYPE_ONE_SHOT);
}
} break;
default: {
nsMenuParent* menuParent = GetMenuParent();
if (menuParent) {
menuParent->LockMenuUntilClosed(false);
}
PassMenuCommandEventToPopupManager();
StopBlinking();
break;
}
}
}
return NS_OK;
}
bool nsMenuFrame::IsDisabled() {
return mContent->AsElement()->AttrValueIs(
kNameSpaceID_None, nsGkAtoms::disabled, nsGkAtoms::_true, eCaseMatters);
}
void nsMenuFrame::UpdateMenuType() {
static Element::AttrValuesArray strings[] = {nsGkAtoms::checkbox,
nsGkAtoms::radio, nullptr};
switch (mContent->AsElement()->FindAttrValueIn(
kNameSpaceID_None, nsGkAtoms::type, strings, eCaseMatters)) {
case 0:
mType = eMenuType_Checkbox;
break;
case 1:
mType = eMenuType_Radio;
mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::name,
mGroupName);
break;
default:
if (mType != eMenuType_Normal) {
AutoWeakFrame weakFrame(this);
mContent->AsElement()->UnsetAttr(kNameSpaceID_None, nsGkAtoms::checked,
true);
NS_ENSURE_TRUE_VOID(weakFrame.IsAlive());
}
mType = eMenuType_Normal;
break;
}
UpdateMenuSpecialState();
}
/* update checked-ness for type="checkbox" and type="radio" */
void nsMenuFrame::UpdateMenuSpecialState() {
bool newChecked = mContent->AsElement()->AttrValueIs(
kNameSpaceID_None, nsGkAtoms::checked, nsGkAtoms::_true, eCaseMatters);
if (newChecked == mChecked) {
/* checked state didn't change */
if (mType != eMenuType_Radio)
return; // only Radio possibly cares about other kinds of change
if (!mChecked || mGroupName.IsEmpty()) return; // no interesting change
} else {
mChecked = newChecked;
if (mType != eMenuType_Radio || !mChecked)
/*
* Unchecking something requires no further changes, and only
* menuRadio has to do additional work when checked.
*/
return;
}
/*
* If we get this far, we're type=radio, and:
* - our name= changed, or
* - we went from checked="false" to checked="true"
*/
/*
* Behavioural note:
* If we're checked and renamed _into_ an existing radio group, we are
* made the new checked item, and we unselect the previous one.
*
* The only other reasonable behaviour would be to check for another selected
* item in that group. If found, unselect ourselves, otherwise we're the
* selected item. That, however, would be a lot more work, and I don't think
* it's better at all.
*/
/* walk siblings, looking for the other checked item with the same name */
// get the first sibling in this menu popup. This frame may be it, and if
// we're being called at creation time, this frame isn't yet in the parent's
// child list. All I'm saying is that this may fail, but it's most likely
// alright.
nsIFrame* firstMenuItem =
nsXULPopupManager::GetNextMenuItem(GetParent(), nullptr, true, false);
nsIFrame* sib = firstMenuItem;
while (sib) {
nsMenuFrame* menu = do_QueryFrame(sib);
if (sib != this) {
if (menu && menu->GetMenuType() == eMenuType_Radio && menu->IsChecked() &&
menu->GetRadioGroupName() == mGroupName) {
/* uncheck the old item */
sib->GetContent()->AsElement()->UnsetAttr(kNameSpaceID_None,
nsGkAtoms::checked, true);
// XXX in DEBUG, check to make sure that there aren't two checked items
return;
}
}
sib = nsXULPopupManager::GetNextMenuItem(GetParent(), menu, true, true);
if (sib == firstMenuItem) {
break;
}
}
}
void nsMenuFrame::BuildAcceleratorText(bool aNotify) {
nsAutoString accelText;
if ((GetStateBits() & NS_STATE_ACCELTEXT_IS_DERIVED) == 0) {
mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::acceltext,
accelText);
if (!accelText.IsEmpty()) return;
}
// accelText is definitely empty here.
// Now we're going to compute the accelerator text, so remember that we did.
AddStateBits(NS_STATE_ACCELTEXT_IS_DERIVED);
// If anything below fails, just leave the accelerator text blank.
AutoWeakFrame weakFrame(this);
mContent->AsElement()->UnsetAttr(kNameSpaceID_None, nsGkAtoms::acceltext,
aNotify);
NS_ENSURE_TRUE_VOID(weakFrame.IsAlive());
// See if we have a key node and use that instead.
nsAutoString keyValue;
mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::key, keyValue);
if (keyValue.IsEmpty()) return;
// Turn the document into a DOM document so we can use getElementById
Document* document = mContent->GetUncomposedDoc();
if (!document) return;
// XXXsmaug If mContent is in shadow dom, should we use
// ShadowRoot::GetElementById()?
Element* keyElement = document->GetElementById(keyValue);
if (!keyElement) {
#ifdef DEBUG
nsAutoString label;
mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::label, label);
nsAutoString msg = NS_LITERAL_STRING("Key '") + keyValue +
NS_LITERAL_STRING("' of menu item '") + label +
NS_LITERAL_STRING("' could not be found");
NS_WARNING(NS_ConvertUTF16toUTF8(msg).get());
#endif
return;
}
// get the string to display as accelerator text
// check the key element's attributes in this order:
// |keytext|, |key|, |keycode|
nsAutoString accelString;
keyElement->GetAttr(kNameSpaceID_None, nsGkAtoms::keytext, accelString);
if (accelString.IsEmpty()) {
keyElement->GetAttr(kNameSpaceID_None, nsGkAtoms::key, accelString);
if (!accelString.IsEmpty()) {
ToUpperCase(accelString);
} else {
nsAutoString keyCode;
keyElement->GetAttr(kNameSpaceID_None, nsGkAtoms::keycode, keyCode);
ToUpperCase(keyCode);
nsresult rv;
nsCOMPtr<nsIStringBundleService> bundleService =
mozilla::services::GetStringBundleService();
if (bundleService) {
nsCOMPtr<nsIStringBundle> bundle;
rv = bundleService->CreateBundle(
keyCode.EqualsLiteral("VK_RETURN")
? "chrome://global-platform/locale/platformKeys.properties"
: "chrome://global/locale/keys.properties",
getter_AddRefs(bundle));
if (NS_SUCCEEDED(rv) && bundle) {
nsAutoString keyName;
rv = bundle->GetStringFromName(NS_ConvertUTF16toUTF8(keyCode).get(),
keyName);
if (NS_SUCCEEDED(rv)) {
accelString = keyName;
}
}
}
// nothing usable found, bail
if (accelString.IsEmpty()) return;
}
}
nsAutoString modifiers;
keyElement->GetAttr(kNameSpaceID_None, nsGkAtoms::modifiers, modifiers);
char* str = ToNewCString(modifiers);
char* newStr;
char* token = nsCRT::strtok(str, ", \t", &newStr);
nsAutoString shiftText;
nsAutoString altText;
nsAutoString metaText;
nsAutoString controlText;
nsAutoString osText;
nsAutoString modifierSeparator;
nsContentUtils::GetShiftText(shiftText);
nsContentUtils::GetAltText(altText);
nsContentUtils::GetMetaText(metaText);
nsContentUtils::GetControlText(controlText);
nsContentUtils::GetOSText(osText);
nsContentUtils::GetModifierSeparatorText(modifierSeparator);
while (token) {
if (PL_strcmp(token, "shift") == 0)
accelText += shiftText;
else if (PL_strcmp(token, "alt") == 0)
accelText += altText;
else if (PL_strcmp(token, "meta") == 0)
accelText += metaText;
else if (PL_strcmp(token, "os") == 0)
accelText += osText;
else if (PL_strcmp(token, "control") == 0)
accelText += controlText;
else if (PL_strcmp(token, "accel") == 0) {
switch (WidgetInputEvent::AccelModifier()) {
case MODIFIER_META:
accelText += metaText;
break;
case MODIFIER_OS:
accelText += osText;
break;
case MODIFIER_ALT:
accelText += altText;
break;
case MODIFIER_CONTROL:
accelText += controlText;
break;
default:
MOZ_CRASH(
"Handle the new result of WidgetInputEvent::AccelModifier()");
break;
}
}
accelText += modifierSeparator;
token = nsCRT::strtok(newStr, ", \t", &newStr);
}
free(str);
accelText += accelString;
mIgnoreAccelTextChange = true;
mContent->AsElement()->SetAttr(kNameSpaceID_None, nsGkAtoms::acceltext,
accelText, aNotify);
NS_ENSURE_TRUE_VOID(weakFrame.IsAlive());
mIgnoreAccelTextChange = false;
}
void nsMenuFrame::Execute(WidgetGUIEvent* aEvent) {
// flip "checked" state if we're a checkbox menu, or an un-checked radio menu
bool needToFlipChecked = false;
if (mType == eMenuType_Checkbox || (mType == eMenuType_Radio && !mChecked)) {
needToFlipChecked = !mContent->AsElement()->AttrValueIs(
kNameSpaceID_None, nsGkAtoms::autocheck, nsGkAtoms::_false,
eCaseMatters);
}
nsCOMPtr<nsISound> sound(do_CreateInstance("@mozilla.org/sound;1"));
if (sound) sound->PlayEventSound(nsISound::EVENT_MENU_EXECUTE);
StartBlinking(aEvent, needToFlipChecked);
}
bool nsMenuFrame::ShouldBlink() {
int32_t shouldBlink =
LookAndFeel::GetInt(LookAndFeel::eIntID_ChosenMenuItemsShouldBlink, 0);
if (!shouldBlink) return false;
return true;
}
void nsMenuFrame::StartBlinking(WidgetGUIEvent* aEvent, bool aFlipChecked) {
StopBlinking();
CreateMenuCommandEvent(aEvent, aFlipChecked);
if (!ShouldBlink()) {
PassMenuCommandEventToPopupManager();
return;
}
// Blink off.
AutoWeakFrame weakFrame(this);
mContent->AsElement()->UnsetAttr(kNameSpaceID_None, nsGkAtoms::menuactive,
true);
if (!weakFrame.IsAlive()) return;
nsMenuParent* menuParent = GetMenuParent();
if (menuParent) {
// Make this menu ignore events from now on.
menuParent->LockMenuUntilClosed(true);
}
// Set up a timer to blink back on.
NS_NewTimerWithCallback(
getter_AddRefs(mBlinkTimer), mTimerMediator, kBlinkDelay,
nsITimer::TYPE_ONE_SHOT,
mContent->OwnerDoc()->EventTargetFor(TaskCategory::Other));
mBlinkState = 1;
}
void nsMenuFrame::StopBlinking() {
mBlinkState = 0;
if (mBlinkTimer) {
mBlinkTimer->Cancel();
mBlinkTimer = nullptr;
}
mDelayedMenuCommandEvent = nullptr;
}
void nsMenuFrame::CreateMenuCommandEvent(WidgetGUIEvent* aEvent,
bool aFlipChecked) {
// Create a trusted event if the triggering event was trusted, or if
// we're called from chrome code (since at least one of our caller
// passes in a null event).
bool isTrusted =
aEvent ? aEvent->IsTrusted() : nsContentUtils::IsCallerChrome();
bool shift = false, control = false, alt = false, meta = false;
WidgetInputEvent* inputEvent = aEvent ? aEvent->AsInputEvent() : nullptr;
if (inputEvent) {
shift = inputEvent->IsShift();
control = inputEvent->IsControl();
alt = inputEvent->IsAlt();
meta = inputEvent->IsMeta();
}
// Because the command event is firing asynchronously, a flag is needed to
// indicate whether user input is being handled. This ensures that a popup
// window won't get blocked.
bool userinput = UserActivation::IsHandlingUserInput();
mDelayedMenuCommandEvent =
new nsXULMenuCommandEvent(mContent->AsElement(), isTrusted, shift,
control, alt, meta, userinput, aFlipChecked);
}
void nsMenuFrame::PassMenuCommandEventToPopupManager() {
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
nsMenuParent* menuParent = GetMenuParent();
if (pm && menuParent && mDelayedMenuCommandEvent) {
pm->ExecuteMenu(mContent, mDelayedMenuCommandEvent);
}
mDelayedMenuCommandEvent = nullptr;
}
void nsMenuFrame::RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) {
nsFrameList* popupList = GetPopupList();
if (popupList && popupList->FirstChild() == aOldFrame) {
popupList->RemoveFirstChild();
aOldFrame->Destroy();
DestroyPopupList();
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::TreeChange,
NS_FRAME_HAS_DIRTY_CHILDREN);
return;
}
nsBoxFrame::RemoveFrame(aListID, aOldFrame);
}
void nsMenuFrame::InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
const nsLineList::iterator* aPrevFrameLine,
nsFrameList& aFrameList) {
if (!HasPopup() && (aListID == kPrincipalList || aListID == kPopupList)) {
SetPopupFrame(aFrameList);
if (HasPopup()) {
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::TreeChange,
NS_FRAME_HAS_DIRTY_CHILDREN);
}
}
if (aFrameList.IsEmpty()) return;
if (MOZ_UNLIKELY(aPrevFrame && aPrevFrame == GetPopup())) {
aPrevFrame = nullptr;
}
nsBoxFrame::InsertFrames(aListID, aPrevFrame, aPrevFrameLine, aFrameList);
}
void nsMenuFrame::AppendFrames(ChildListID aListID, nsFrameList& aFrameList) {
if (!HasPopup() && (aListID == kPrincipalList || aListID == kPopupList)) {
SetPopupFrame(aFrameList);
if (HasPopup()) {
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::TreeChange,
NS_FRAME_HAS_DIRTY_CHILDREN);
}
}
if (aFrameList.IsEmpty()) return;
nsBoxFrame::AppendFrames(aListID, aFrameList);
}
bool nsMenuFrame::SizeToPopup(nsBoxLayoutState& aState, nsSize& aSize) {
if (!IsXULCollapsed()) {
bool widthSet, heightSet;
nsSize tmpSize(-1, 0);
nsIFrame::AddXULPrefSize(this, tmpSize, widthSet, heightSet);
if (!widthSet && GetXULFlex() == 0) {
nsMenuPopupFrame* popupFrame = GetPopup();
if (!popupFrame) return false;
tmpSize = popupFrame->GetXULPrefSize(aState);
// Produce a size such that:
// (1) the menu and its popup can be the same width
// (2) there's enough room in the menu for the content and its
// border-padding
// (3) there's enough room in the popup for the content and its
// scrollbar
nsMargin borderPadding;
GetXULBorderAndPadding(borderPadding);
// if there is a scroll frame, add the desired width of the scrollbar as
// well
nsIScrollableFrame* scrollFrame = popupFrame->GetScrollFrame(popupFrame);
nscoord scrollbarWidth = 0;
if (scrollFrame) {
scrollbarWidth =
scrollFrame->GetDesiredScrollbarSizes(&aState).LeftRight();
}
aSize.width =
tmpSize.width + std::max(borderPadding.LeftRight(), scrollbarWidth);
return true;
}
}
return false;
}
nsSize nsMenuFrame::GetXULPrefSize(nsBoxLayoutState& aState) {
nsSize size = nsBoxFrame::GetXULPrefSize(aState);
DISPLAY_PREF_SIZE(this, size);
// If we are using sizetopopup="always" then
// nsBoxFrame will already have enforced the minimum size
if (!IsSizedToPopup(mContent, true) && IsSizedToPopup(mContent, false) &&
SizeToPopup(aState, size)) {
// We now need to ensure that size is within the min - max range.
nsSize minSize = nsBoxFrame::GetXULMinSize(aState);
nsSize maxSize = GetXULMaxSize(aState);
size = BoundsCheck(minSize, size, maxSize);
}
return size;
}
NS_IMETHODIMP
nsMenuFrame::GetActiveChild(dom::Element** aResult) {
nsMenuPopupFrame* popupFrame = GetPopup();
if (!popupFrame) return NS_ERROR_FAILURE;
nsMenuFrame* menuFrame = popupFrame->GetCurrentMenuItem();
if (!menuFrame) {
*aResult = nullptr;
} else {
RefPtr<dom::Element> elt = menuFrame->GetContent()->AsElement();
elt.forget(aResult);
}
return NS_OK;
}
NS_IMETHODIMP
nsMenuFrame::SetActiveChild(dom::Element* aChild) {
nsMenuPopupFrame* popupFrame = GetPopup();
if (!popupFrame) return NS_ERROR_FAILURE;
// Force the child frames within the popup to be generated.
AutoWeakFrame weakFrame(popupFrame);
popupFrame->GenerateFrames();
if (!weakFrame.IsAlive()) {
return NS_OK;
}
if (!aChild) {
// Remove the current selection
popupFrame->ChangeMenuItem(nullptr, false, false);
return NS_OK;
}
nsMenuFrame* menu = do_QueryFrame(aChild->GetPrimaryFrame());
if (menu) popupFrame->ChangeMenuItem(menu, false, false);
return NS_OK;
}
nsIScrollableFrame* nsMenuFrame::GetScrollTargetFrame() {
nsMenuPopupFrame* popupFrame = GetPopup();
if (!popupFrame) return nullptr;
nsIFrame* childFrame = popupFrame->PrincipalChildList().FirstChild();
if (childFrame) return popupFrame->GetScrollFrame(childFrame);
return nullptr;
}
// nsMenuTimerMediator implementation.
NS_IMPL_ISUPPORTS(nsMenuTimerMediator, nsITimerCallback)
/**
* Constructs a wrapper around an nsMenuFrame.
* @param aFrame nsMenuFrame to create a wrapper around.
*/
nsMenuTimerMediator::nsMenuTimerMediator(nsMenuFrame* aFrame) : mFrame(aFrame) {
NS_ASSERTION(mFrame, "Must have frame");
}
nsMenuTimerMediator::~nsMenuTimerMediator() {}
/**
* Delegates the notification to the contained frame if it has not been
* destroyed.
* @param aTimer Timer which initiated the callback.
* @return NS_ERROR_FAILURE if the frame has been destroyed.
*/
NS_IMETHODIMP nsMenuTimerMediator::Notify(nsITimer* aTimer) {
if (!mFrame) return NS_ERROR_FAILURE;
return mFrame->Notify(aTimer);
}
/**
* Clear the pointer to the contained nsMenuFrame. This should be called
* when the contained nsMenuFrame is destroyed.
*/
void nsMenuTimerMediator::ClearFrame() { mFrame = nullptr; }
/**
* Get the name of this timer callback.
* @param aName the name to return
*/
NS_IMETHODIMP
nsMenuTimerMediator::GetName(nsACString& aName) {
aName.AssignLiteral("nsMenuTimerMediator");
return NS_OK;
}
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