gecko-dev/widget/cocoa/nsMenuGroupOwnerX.mm

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsMenuGroupOwnerX.h"
#include "nsMenuBarX.h"
#include "nsMenuX.h"
#include "nsMenuItemX.h"
#include "nsMenuUtilsX.h"
#include "nsCocoaUtils.h"
#include "nsCocoaWindow.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsObjCExceptions.h"
#include "nsHashtable.h"
#include "nsThreadUtils.h"
#include "mozilla/dom/Element.h"
#include "nsIWidget.h"
#include "nsIDocument.h"
#include "nsIDOMDocument.h"
#include "nsIDOMElement.h"
#include "nsINode.h"
namespace dom = mozilla::dom;
NS_IMPL_ISUPPORTS1(nsMenuGroupOwnerX, nsIMutationObserver)
nsMenuGroupOwnerX::nsMenuGroupOwnerX()
: mCurrentCommandID(eCommand_ID_Last),
mDocument(nullptr)
{
}
nsMenuGroupOwnerX::~nsMenuGroupOwnerX()
{
// make sure we unregister ourselves as a document observer
if (mDocument)
mDocument->RemoveMutationObserver(this);
}
nsresult nsMenuGroupOwnerX::Create(nsIContent* aContent)
{
if (!aContent)
return NS_ERROR_INVALID_ARG;
mContent = aContent;
nsIDocument* doc = aContent->OwnerDoc();
if (!doc)
return NS_ERROR_FAILURE;
doc->AddMutationObserver(this);
mDocument = doc;
return NS_OK;
}
//
// nsIMutationObserver
//
void nsMenuGroupOwnerX::CharacterDataWillChange(nsIDocument* aDocument,
nsIContent* aContent,
CharacterDataChangeInfo* aInfo)
{
}
void nsMenuGroupOwnerX::CharacterDataChanged(nsIDocument* aDocument,
nsIContent* aContent,
CharacterDataChangeInfo* aInfo)
{
}
void nsMenuGroupOwnerX::ContentAppended(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aFirstNewContent,
int32_t /* unused */)
{
for (nsIContent* cur = aFirstNewContent; cur; cur = cur->GetNextSibling()) {
ContentInserted(aDocument, aContainer, cur, 0);
}
}
void nsMenuGroupOwnerX::NodeWillBeDestroyed(const nsINode * aNode)
{
// our menu bar node is being destroyed
mDocument = nullptr;
}
void nsMenuGroupOwnerX::AttributeWillChange(nsIDocument* aDocument,
dom::Element* aContent,
int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
}
void nsMenuGroupOwnerX::AttributeChanged(nsIDocument* aDocument,
dom::Element* aElement,
int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
nsCOMPtr<nsIMutationObserver> kungFuDeathGrip(this);
nsChangeObserver* obs = LookupContentChangeObserver(aElement);
if (obs)
obs->ObserveAttributeChanged(aDocument, aElement, aAttribute);
}
void nsMenuGroupOwnerX::ContentRemoved(nsIDocument * aDocument,
nsIContent * aContainer,
nsIContent * aChild,
int32_t aIndexInContainer,
nsIContent * aPreviousSibling)
{
if (!aContainer) {
return;
}
nsCOMPtr<nsIMutationObserver> kungFuDeathGrip(this);
nsChangeObserver* obs = LookupContentChangeObserver(aContainer);
if (obs)
obs->ObserveContentRemoved(aDocument, aChild, aIndexInContainer);
else if (aContainer != mContent) {
// We do a lookup on the parent container in case things were removed
// under a "menupopup" item. That is basically a wrapper for the contents
// of a "menu" node.
nsCOMPtr<nsIContent> parent = aContainer->GetParent();
if (parent) {
obs = LookupContentChangeObserver(parent);
if (obs)
obs->ObserveContentRemoved(aDocument, aChild, aIndexInContainer);
}
}
}
void nsMenuGroupOwnerX::ContentInserted(nsIDocument * aDocument,
nsIContent * aContainer,
nsIContent * aChild,
int32_t /* unused */)
{
if (!aContainer) {
return;
}
nsCOMPtr<nsIMutationObserver> kungFuDeathGrip(this);
nsChangeObserver* obs = LookupContentChangeObserver(aContainer);
if (obs)
obs->ObserveContentInserted(aDocument, aContainer, aChild);
else if (aContainer != mContent) {
// We do a lookup on the parent container in case things were removed
// under a "menupopup" item. That is basically a wrapper for the contents
// of a "menu" node.
nsCOMPtr<nsIContent> parent = aContainer->GetParent();
if (parent) {
obs = LookupContentChangeObserver(parent);
if (obs)
obs->ObserveContentInserted(aDocument, aContainer, aChild);
}
}
}
void nsMenuGroupOwnerX::ParentChainChanged(nsIContent *aContent)
{
}
// For change management, we don't use a |nsSupportsHashtable| because
// we know that the lifetime of all these items is bounded by the
// lifetime of the menubar. No need to add any more strong refs to the
// picture because the containment hierarchy already uses strong refs.
void nsMenuGroupOwnerX::RegisterForContentChanges(nsIContent *aContent,
nsChangeObserver *aMenuObject)
{
mContentToObserverTable.Put(aContent, aMenuObject);
}
void nsMenuGroupOwnerX::UnregisterForContentChanges(nsIContent *aContent)
{
mContentToObserverTable.Remove(aContent);
}
nsChangeObserver* nsMenuGroupOwnerX::LookupContentChangeObserver(nsIContent* aContent)
{
nsChangeObserver * result;
if (mContentToObserverTable.Get(aContent, &result))
return result;
else
return nullptr;
}
// Given a menu item, creates a unique 4-character command ID and
// maps it to the item. Returns the id for use by the client.
uint32_t nsMenuGroupOwnerX::RegisterForCommand(nsMenuItemX* inMenuItem)
{
// no real need to check for uniqueness. We always start afresh with each
// window at 1. Even if we did get close to the reserved Apple command id's,
// those don't start until at least ' ', which is integer 538976288. If
// we have that many menu items in one window, I think we have other
// problems.
// make id unique
++mCurrentCommandID;
mCommandToMenuObjectTable.Put(mCurrentCommandID, inMenuItem);
return mCurrentCommandID;
}
// Removes the mapping between the given 4-character command ID
// and its associated menu item.
void nsMenuGroupOwnerX::UnregisterCommand(uint32_t inCommandID)
{
mCommandToMenuObjectTable.Remove(inCommandID);
}
nsMenuItemX* nsMenuGroupOwnerX::GetMenuItemForCommandID(uint32_t inCommandID)
{
nsMenuItemX * result;
if (mCommandToMenuObjectTable.Get(inCommandID, &result))
return result;
else
return nullptr;
}