RandomHuman
/
Mypal
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Mypal/dom/xul/nsXULPopupListener.cpp

443 lines
14 KiB
C++
Raw Permalink Blame History

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
This file provides the implementation for xul popup listener which
tracks xul popups and context menus
*/
#include "nsXULPopupListener.h"
#include "nsCOMPtr.h"
#include "nsGkAtoms.h"
#include "nsIDOMElement.h"
#include "nsIDOMXULElement.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMDocument.h"
#include "nsIDOMDocumentXBL.h"
#include "nsContentCID.h"
#include "nsContentUtils.h"
#include "nsXULPopupManager.h"
#include "nsIScriptContext.h"
#include "nsIDOMWindow.h"
#include "nsIDOMXULDocument.h"
#include "nsIDocument.h"
#include "nsServiceManagerUtils.h"
#include "nsIPrincipal.h"
#include "nsIScriptSecurityManager.h"
#include "nsLayoutUtils.h"
#include "mozilla/ReflowInput.h"
#include "nsIObjectLoadingContent.h"
#include "mozilla/EventStateManager.h"
#include "mozilla/EventStates.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/Event.h" // for nsIDOMEvent::InternalDOMEvent()
#include "mozilla/dom/EventTarget.h"
#include "mozilla/dom/FragmentOrElement.h"
// for event firing in context menus
#include "nsPresContext.h"
#include "nsIPresShell.h"
#include "nsFocusManager.h"
#include "nsPIDOMWindow.h"
#include "nsViewManager.h"
#include "nsError.h"
#include "nsMenuFrame.h"
using namespace mozilla;
using namespace mozilla::dom;
// on win32 and os/2, context menus come up on mouse up. On other platforms,
// they appear on mouse down. Certain bits of code care about this difference.
#if defined(XP_WIN)
#define NS_CONTEXT_MENU_IS_MOUSEUP 1
#endif
nsXULPopupListener::nsXULPopupListener(mozilla::dom::Element* aElement,
bool aIsContext)
: mElement(aElement), mPopupContent(nullptr), mIsContext(aIsContext)
{
}
nsXULPopupListener::~nsXULPopupListener(void)
{
ClosePopup();
}
NS_IMPL_CYCLE_COLLECTION(nsXULPopupListener, mElement, mPopupContent)
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsXULPopupListener)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsXULPopupListener)
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsXULPopupListener)
// If the owner, mElement, can be skipped, so can we.
if (tmp->mElement) {
return mozilla::dom::FragmentOrElement::CanSkip(tmp->mElement, true);
}
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsXULPopupListener)
if (tmp->mElement) {
return mozilla::dom::FragmentOrElement::CanSkipInCC(tmp->mElement);
}
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsXULPopupListener)
if (tmp->mElement) {
return mozilla::dom::FragmentOrElement::CanSkipThis(tmp->mElement);
}
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsXULPopupListener)
NS_INTERFACE_MAP_ENTRY(nsIDOMEventListener)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
////////////////////////////////////////////////////////////////
// nsIDOMEventListener
nsresult
nsXULPopupListener::HandleEvent(nsIDOMEvent* aEvent)
{
nsAutoString eventType;
aEvent->GetType(eventType);
if(!((eventType.EqualsLiteral("mousedown") && !mIsContext) ||
(eventType.EqualsLiteral("contextmenu") && mIsContext)))
return NS_OK;
int16_t button;
nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aEvent);
if (!mouseEvent) {
//non-ui event passed in. bad things.
return NS_OK;
}
// Get the node that was clicked on.
EventTarget* target = mouseEvent->AsEvent()->InternalDOMEvent()->GetTarget();
nsCOMPtr<nsIDOMNode> targetNode = do_QueryInterface(target);
if (!targetNode && mIsContext) {
// Not a DOM node, see if it's the DOM window (bug 380818).
nsCOMPtr<nsPIDOMWindowInner> domWin = do_QueryInterface(target);
if (!domWin) {
return NS_ERROR_DOM_WRONG_TYPE_ERR;
}
// Try to use the root node as target node.
nsCOMPtr<nsIDocument> doc = domWin->GetDoc();
if (doc)
targetNode = do_QueryInterface(doc->GetRootElement());
if (!targetNode) {
return NS_ERROR_FAILURE;
}
}
nsCOMPtr<nsIContent> targetContent = do_QueryInterface(target);
if (!targetContent) {
return NS_OK;
}
if (EventStateManager::IsRemoteTarget(targetContent)) {
return NS_OK;
}
bool preventDefault;
mouseEvent->AsEvent()->GetDefaultPrevented(&preventDefault);
if (preventDefault && targetNode && mIsContext) {
// Someone called preventDefault on a context menu.
// Let's make sure they are allowed to do so.
bool eventEnabled =
Preferences::GetBool("dom.event.contextmenu.enabled", true);
if (!eventEnabled) {
// If the target node is for plug-in, we should not open XUL context
// menu on windowless plug-ins.
nsCOMPtr<nsIObjectLoadingContent> olc = do_QueryInterface(targetNode);
uint32_t type;
if (olc && NS_SUCCEEDED(olc->GetDisplayedType(&type)) &&
type == nsIObjectLoadingContent::TYPE_PLUGIN) {
return NS_OK;
}
// The user wants his contextmenus. Let's make sure that this is a website
// and not chrome since there could be places in chrome which don't want
// contextmenus.
nsCOMPtr<nsINode> node = do_QueryInterface(targetNode);
if (node) {
nsCOMPtr<nsIPrincipal> system;
nsContentUtils::GetSecurityManager()->
GetSystemPrincipal(getter_AddRefs(system));
if (node->NodePrincipal() != system) {
// This isn't chrome. Cancel the preventDefault() and
// let the event go forth.
preventDefault = false;
}
}
}
}
if (preventDefault) {
// someone called preventDefault. bail.
return NS_OK;
}
// prevent popups on menu and menuitems as they handle their own popups
// This was added for bug 96920.
// If a menu item child was clicked on that leads to a popup needing
// to show, we know (guaranteed) that we're dealing with a menu or
// submenu of an already-showing popup. We don't need to do anything at all.
if (!mIsContext) {
if (targetContent &&
targetContent->IsAnyOfXULElements(nsGkAtoms::menu, nsGkAtoms::menuitem))
return NS_OK;
}
if (mIsContext) {
#ifndef NS_CONTEXT_MENU_IS_MOUSEUP
uint16_t inputSource = nsIDOMMouseEvent::MOZ_SOURCE_UNKNOWN;
mouseEvent->GetMozInputSource(&inputSource);
bool isTouch = inputSource == nsIDOMMouseEvent::MOZ_SOURCE_TOUCH;
// If the context menu launches on mousedown,
// we have to fire focus on the content we clicked on
FireFocusOnTargetContent(targetNode, isTouch);
#endif
}
else {
// Only open popups when the left mouse button is down.
mouseEvent->GetButton(&button);
if (button != 0)
return NS_OK;
}
// Open the popup. LaunchPopup will call StopPropagation and PreventDefault
// in the right situations.
LaunchPopup(aEvent, targetContent);
return NS_OK;
}
#ifndef NS_CONTEXT_MENU_IS_MOUSEUP
nsresult
nsXULPopupListener::FireFocusOnTargetContent(nsIDOMNode* aTargetNode, bool aIsTouch)
{
nsresult rv;
nsCOMPtr<nsIDOMDocument> domDoc;
rv = aTargetNode->GetOwnerDocument(getter_AddRefs(domDoc));
if(NS_SUCCEEDED(rv) && domDoc)
{
nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
// Get nsIDOMElement for targetNode
nsIPresShell *shell = doc->GetShell();
if (!shell)
return NS_ERROR_FAILURE;
// strong reference to keep this from going away between events
// XXXbz between what events? We don't use this local at all!
RefPtr<nsPresContext> context = shell->GetPresContext();
nsCOMPtr<nsIContent> content = do_QueryInterface(aTargetNode);
nsIFrame* targetFrame = content->GetPrimaryFrame();
if (!targetFrame) return NS_ERROR_FAILURE;
const nsStyleUserInterface* ui = targetFrame->StyleUserInterface();
bool suppressBlur = (ui->mUserFocus == StyleUserFocus::Ignore);
nsCOMPtr<nsIDOMElement> element;
nsCOMPtr<nsIContent> newFocus = do_QueryInterface(content);
nsIFrame* currFrame = targetFrame;
// Look for the nearest enclosing focusable frame.
while (currFrame) {
int32_t tabIndexUnused;
if (currFrame->IsFocusable(&tabIndexUnused, true)) {
newFocus = currFrame->GetContent();
nsCOMPtr<nsIDOMElement> domElement(do_QueryInterface(newFocus));
if (domElement) {
element = domElement;
break;
}
}
currFrame = currFrame->GetParent();
}
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm) {
if (element) {
uint32_t focusFlags = nsIFocusManager::FLAG_BYMOUSE |
nsIFocusManager::FLAG_NOSCROLL;
if (aIsTouch) {
focusFlags |= nsIFocusManager::FLAG_BYTOUCH;
}
fm->SetFocus(element, focusFlags);
} else if (!suppressBlur) {
nsPIDOMWindowOuter *window = doc->GetWindow();
fm->ClearFocus(window);
}
}
EventStateManager* esm = context->EventStateManager();
nsCOMPtr<nsIContent> focusableContent = do_QueryInterface(element);
esm->SetContentState(focusableContent, NS_EVENT_STATE_ACTIVE);
}
return rv;
}
#endif
// ClosePopup
//
// Do everything needed to shut down the popup.
//
// NOTE: This routine is safe to call even if the popup is already closed.
//
void
nsXULPopupListener::ClosePopup()
{
if (mPopupContent) {
// this is called when the listener is going away, so make sure that the
// popup is hidden. Use asynchronous hiding just to be safe so we don't
// fire events during destruction.
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm)
pm->HidePopup(mPopupContent, false, true, true, false);
mPopupContent = nullptr; // release the popup
}
} // ClosePopup
static already_AddRefed<nsIContent>
GetImmediateChild(nsIContent* aContent, nsIAtom *aTag)
{
for (nsIContent* child = aContent->GetFirstChild();
child;
child = child->GetNextSibling()) {
if (child->IsXULElement(aTag)) {
nsCOMPtr<nsIContent> ret = child;
return ret.forget();
}
}
return nullptr;
}
//
// LaunchPopup
//
// Given the element on which the event was triggered and the mouse locations in
// Client and widget coordinates, popup a new window showing the appropriate
// content.
//
// aTargetContent is the target of the mouse event aEvent that triggered the
// popup. mElement is the element that the popup menu is attached to.
// aTargetContent may be equal to mElement or it may be a descendant.
//
// This looks for an attribute on |mElement| of the appropriate popup type
// (popup, context) and uses that attribute's value as an ID for
// the popup content in the document.
//
nsresult
nsXULPopupListener::LaunchPopup(nsIDOMEvent* aEvent, nsIContent* aTargetContent)
{
nsresult rv = NS_OK;
nsAutoString identifier;
nsIAtom* type = mIsContext ? nsGkAtoms::context : nsGkAtoms::popup;
bool hasPopupAttr = mElement->GetAttr(kNameSpaceID_None, type, identifier);
if (identifier.IsEmpty()) {
hasPopupAttr = mElement->GetAttr(kNameSpaceID_None,
mIsContext ? nsGkAtoms::contextmenu : nsGkAtoms::menu,
identifier) || hasPopupAttr;
}
if (hasPopupAttr) {
aEvent->StopPropagation();
aEvent->PreventDefault();
}
if (identifier.IsEmpty())
return rv;
// Try to find the popup content and the document.
nsCOMPtr<nsIDocument> document = mElement->GetComposedDoc();
if (!document) {
NS_WARNING("No document!");
return NS_ERROR_FAILURE;
}
// Handle the _child case for popups and context menus
nsCOMPtr<nsIContent> popup;
if (identifier.EqualsLiteral("_child")) {
popup = GetImmediateChild(mElement, nsGkAtoms::menupopup);
if (!popup) {
nsCOMPtr<nsIDOMDocumentXBL> nsDoc(do_QueryInterface(document));
nsCOMPtr<nsIDOMNodeList> list;
nsCOMPtr<nsIDOMElement> el = do_QueryInterface(mElement);
nsDoc->GetAnonymousNodes(el, getter_AddRefs(list));
if (list) {
uint32_t ctr,listLength;
nsCOMPtr<nsIDOMNode> node;
list->GetLength(&listLength);
for (ctr = 0; ctr < listLength; ctr++) {
list->Item(ctr, getter_AddRefs(node));
nsCOMPtr<nsIContent> childContent(do_QueryInterface(node));
if (childContent->NodeInfo()->Equals(nsGkAtoms::menupopup,
kNameSpaceID_XUL)) {
popup.swap(childContent);
break;
}
}
}
}
} else if (!mElement->IsInUncomposedDoc() ||
!(popup = document->GetElementById(identifier))) {
// XXXsmaug Should we try to use ShadowRoot::GetElementById in case
// mElement is in shadow DOM?
//
// Use getElementById to obtain the popup content and gracefully fail if
// we didn't find any popup content in the document.
NS_WARNING("GetElementById had some kind of spasm.");
return rv;
}
// return if no popup was found or the popup is the element itself.
if (!popup || popup == mElement)
return NS_OK;
// Submenus can't be used as context menus or popups, bug 288763.
// Similar code also in nsXULTooltipListener::GetTooltipFor.
nsIContent* parent = popup->GetParent();
if (parent) {
nsMenuFrame* menu = do_QueryFrame(parent->GetPrimaryFrame());
if (menu)
return NS_OK;
}
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (!pm)
return NS_OK;
// For left-clicks, if the popup has an position attribute, or both the
// popupanchor and popupalign attributes are used, anchor the popup to the
// element, otherwise just open it at the screen position where the mouse
// was clicked. Context menus always open at the mouse position.
mPopupContent = popup;
if (!mIsContext &&
(mPopupContent->HasAttr(kNameSpaceID_None, nsGkAtoms::position) ||
(mPopupContent->HasAttr(kNameSpaceID_None, nsGkAtoms::popupanchor) &&
mPopupContent->HasAttr(kNameSpaceID_None, nsGkAtoms::popupalign)))) {
pm->ShowPopup(mPopupContent, mElement, EmptyString(), 0, 0,
false, true, false, aEvent);
}
else {
int32_t xPos = 0, yPos = 0;
nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aEvent);
mouseEvent->GetScreenX(&xPos);
mouseEvent->GetScreenY(&yPos);
pm->ShowPopupAtScreen(mPopupContent, xPos, yPos, mIsContext, aEvent);
}
return NS_OK;
}
Reference in New Issue View Git Blame Copy Permalink