mirror of
https://github.com/mozilla/gecko-dev.git
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ff8b5bd178
These were originally exposed directly as static methods on nsGlobalWindow, but as they are clearly associated with either the inner or outer window, it makes more sense for them to be called as such. MozReview-Commit-ID: LFq8EfnhDlo
814 lines
23 KiB
C++
814 lines
23 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsCOMPtr.h"
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#include "nsString.h"
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#include "nsReadableUtils.h"
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#include "nsUnicharUtils.h"
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#include "nsTArray.h"
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#include "nsIBaseWindow.h"
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#include "nsIWidget.h"
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#include "nsIDOMWindow.h"
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#include "nsIObserverService.h"
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#include "nsIServiceManager.h"
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#include "nsISimpleEnumerator.h"
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#include "nsAppShellWindowEnumerator.h"
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#include "nsWindowMediator.h"
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#include "nsIWindowMediatorListener.h"
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#include "nsGlobalWindow.h"
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#include "nsIDocShell.h"
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#include "nsIInterfaceRequestor.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsIXULWindow.h"
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using namespace mozilla;
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nsresult
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nsWindowMediator::GetDOMWindow(nsIXULWindow* inWindow,
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nsCOMPtr<nsPIDOMWindowOuter>& outDOMWindow)
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{
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nsCOMPtr<nsIDocShell> docShell;
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outDOMWindow = nullptr;
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inWindow->GetDocShell(getter_AddRefs(docShell));
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NS_ENSURE_TRUE(docShell, NS_ERROR_FAILURE);
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outDOMWindow = docShell->GetWindow();
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return outDOMWindow ? NS_OK : NS_ERROR_FAILURE;
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}
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nsWindowMediator::nsWindowMediator() :
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mEnumeratorList(), mOldestWindow(nullptr), mTopmostWindow(nullptr),
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mTimeStamp(0), mSortingZOrder(false), mReady(false)
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{
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}
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nsWindowMediator::~nsWindowMediator()
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{
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while (mOldestWindow)
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UnregisterWindow(mOldestWindow);
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}
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nsresult nsWindowMediator::Init()
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{
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nsresult rv;
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nsCOMPtr<nsIObserverService> obsSvc =
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do_GetService("@mozilla.org/observer-service;1", &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = obsSvc->AddObserver(this, "xpcom-shutdown", true);
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NS_ENSURE_SUCCESS(rv, rv);
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mReady = true;
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return NS_OK;
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}
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NS_IMETHODIMP nsWindowMediator::RegisterWindow(nsIXULWindow* inWindow)
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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NS_ENSURE_STATE(mReady);
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if (GetInfoFor(inWindow)) {
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NS_ERROR("multiple window registration");
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return NS_ERROR_FAILURE;
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}
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mTimeStamp++;
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// Create window info struct and add to list of windows
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nsWindowInfo* windowInfo = new nsWindowInfo(inWindow, mTimeStamp);
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ListenerArray::ForwardIterator iter(mListeners);
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while (iter.HasMore()) {
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iter.GetNext()->OnOpenWindow(inWindow);
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}
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if (mOldestWindow)
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windowInfo->InsertAfter(mOldestWindow->mOlder, nullptr);
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else
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mOldestWindow = windowInfo;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowMediator::UnregisterWindow(nsIXULWindow* inWindow)
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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NS_ENSURE_STATE(mReady);
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nsWindowInfo *info = GetInfoFor(inWindow);
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if (info)
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return UnregisterWindow(info);
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return NS_ERROR_INVALID_ARG;
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}
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nsresult
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nsWindowMediator::UnregisterWindow(nsWindowInfo *inInfo)
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{
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// Inform the iterators
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uint32_t index = 0;
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while (index < mEnumeratorList.Length()) {
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mEnumeratorList[index]->WindowRemoved(inInfo);
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index++;
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}
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nsIXULWindow* window = inInfo->mWindow.get();
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ListenerArray::ForwardIterator iter(mListeners);
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while (iter.HasMore()) {
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iter.GetNext()->OnCloseWindow(window);
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}
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// Remove from the lists and free up
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if (inInfo == mOldestWindow)
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mOldestWindow = inInfo->mYounger;
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if (inInfo == mTopmostWindow)
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mTopmostWindow = inInfo->mLower;
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inInfo->Unlink(true, true);
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if (inInfo == mOldestWindow)
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mOldestWindow = nullptr;
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if (inInfo == mTopmostWindow)
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mTopmostWindow = nullptr;
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delete inInfo;
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return NS_OK;
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}
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nsWindowInfo*
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nsWindowMediator::GetInfoFor(nsIXULWindow *aWindow)
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{
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nsWindowInfo *info,
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*listEnd;
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if (!aWindow)
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return nullptr;
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info = mOldestWindow;
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listEnd = nullptr;
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while (info != listEnd) {
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if (info->mWindow.get() == aWindow)
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return info;
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info = info->mYounger;
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listEnd = mOldestWindow;
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}
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return nullptr;
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}
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nsWindowInfo*
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nsWindowMediator::GetInfoFor(nsIWidget *aWindow)
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{
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nsWindowInfo *info,
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*listEnd;
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if (!aWindow)
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return nullptr;
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info = mOldestWindow;
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listEnd = nullptr;
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nsCOMPtr<nsIWidget> scanWidget;
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while (info != listEnd) {
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nsCOMPtr<nsIBaseWindow> base(do_QueryInterface(info->mWindow));
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if (base)
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base->GetMainWidget(getter_AddRefs(scanWidget));
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if (aWindow == scanWidget.get())
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return info;
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info = info->mYounger;
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listEnd = mOldestWindow;
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}
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return nullptr;
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}
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NS_IMETHODIMP
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nsWindowMediator::GetEnumerator(const char16_t* inType, nsISimpleEnumerator** outEnumerator)
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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NS_ENSURE_ARG_POINTER(outEnumerator);
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NS_ENSURE_STATE(mReady);
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RefPtr<nsAppShellWindowEnumerator> enumerator = new nsASDOMWindowEarlyToLateEnumerator(inType, *this);
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enumerator.forget(outEnumerator);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowMediator::GetXULWindowEnumerator(const char16_t* inType, nsISimpleEnumerator** outEnumerator)
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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NS_ENSURE_ARG_POINTER(outEnumerator);
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NS_ENSURE_STATE(mReady);
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RefPtr<nsAppShellWindowEnumerator> enumerator = new nsASXULWindowEarlyToLateEnumerator(inType, *this);
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enumerator.forget(outEnumerator);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowMediator::GetZOrderDOMWindowEnumerator(
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const char16_t *aWindowType, bool aFrontToBack,
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nsISimpleEnumerator **_retval)
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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NS_ENSURE_ARG_POINTER(_retval);
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NS_ENSURE_STATE(mReady);
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RefPtr<nsAppShellWindowEnumerator> enumerator;
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if (aFrontToBack)
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enumerator = new nsASDOMWindowFrontToBackEnumerator(aWindowType, *this);
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else
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enumerator = new nsASDOMWindowBackToFrontEnumerator(aWindowType, *this);
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enumerator.forget(_retval);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowMediator::GetZOrderXULWindowEnumerator(
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const char16_t *aWindowType, bool aFrontToBack,
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nsISimpleEnumerator **_retval)
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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NS_ENSURE_ARG_POINTER(_retval);
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NS_ENSURE_STATE(mReady);
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RefPtr<nsAppShellWindowEnumerator> enumerator;
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if (aFrontToBack)
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enumerator = new nsASXULWindowFrontToBackEnumerator(aWindowType, *this);
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else
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enumerator = new nsASXULWindowBackToFrontEnumerator(aWindowType, *this);
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enumerator.forget(_retval);
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return NS_OK;
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}
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int32_t
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nsWindowMediator::AddEnumerator(nsAppShellWindowEnumerator * inEnumerator)
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{
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return mEnumeratorList.AppendElement(inEnumerator) != nullptr;
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}
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int32_t
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nsWindowMediator::RemoveEnumerator(nsAppShellWindowEnumerator * inEnumerator)
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{
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return mEnumeratorList.RemoveElement(inEnumerator);
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}
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// Returns the window of type inType ( if null return any window type ) which has the most recent
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// time stamp
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NS_IMETHODIMP
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nsWindowMediator::GetMostRecentWindow(const char16_t* inType,
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mozIDOMWindowProxy** outWindow)
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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NS_ENSURE_ARG_POINTER(outWindow);
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*outWindow = nullptr;
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if (!mReady)
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return NS_OK;
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// Find the most window with the highest time stamp that matches
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// the requested type
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nsWindowInfo* info = MostRecentWindowInfo(inType, false);
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if (info && info->mWindow) {
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nsCOMPtr<nsPIDOMWindowOuter> DOMWindow;
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if (NS_SUCCEEDED(GetDOMWindow(info->mWindow, DOMWindow))) {
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DOMWindow.forget(outWindow);
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return NS_OK;
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}
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowMediator::GetMostRecentNonPBWindow(const char16_t* aType, mozIDOMWindowProxy** aWindow)
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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NS_ENSURE_ARG_POINTER(aWindow);
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*aWindow = nullptr;
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nsWindowInfo *info = MostRecentWindowInfo(aType, true);
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nsCOMPtr<nsPIDOMWindowOuter> domWindow;
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if (info && info->mWindow) {
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GetDOMWindow(info->mWindow, domWindow);
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}
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if (!domWindow) {
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return NS_ERROR_FAILURE;
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}
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domWindow.forget(aWindow);
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return NS_OK;
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}
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nsWindowInfo*
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nsWindowMediator::MostRecentWindowInfo(const char16_t* inType,
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bool aSkipPrivateBrowsingOrClosed)
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{
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int32_t lastTimeStamp = -1;
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nsAutoString typeString(inType);
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bool allWindows = !inType || typeString.IsEmpty();
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// Find the most recent window with the highest time stamp that matches
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// the requested type and has the correct browsing mode.
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nsWindowInfo* searchInfo = mOldestWindow;
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nsWindowInfo* listEnd = nullptr;
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nsWindowInfo* foundInfo = nullptr;
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for (; searchInfo != listEnd; searchInfo = searchInfo->mYounger) {
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listEnd = mOldestWindow;
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if (!allWindows && !searchInfo->TypeEquals(typeString)) {
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continue;
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}
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if (searchInfo->mTimeStamp < lastTimeStamp) {
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continue;
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}
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if (!searchInfo->mWindow) {
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continue;
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}
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if (aSkipPrivateBrowsingOrClosed) {
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nsCOMPtr<nsIDocShell> docShell;
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searchInfo->mWindow->GetDocShell(getter_AddRefs(docShell));
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nsCOMPtr<nsILoadContext> loadContext = do_QueryInterface(docShell);
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if (!loadContext || loadContext->UsePrivateBrowsing()) {
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continue;
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}
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nsCOMPtr<nsPIDOMWindowOuter> piwindow = docShell->GetWindow();
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if (!piwindow || piwindow->Closed()) {
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continue;
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}
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}
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foundInfo = searchInfo;
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lastTimeStamp = searchInfo->mTimeStamp;
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}
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return foundInfo;
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}
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NS_IMETHODIMP
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nsWindowMediator::GetOuterWindowWithId(uint64_t aWindowID,
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mozIDOMWindowProxy** aWindow)
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{
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RefPtr<nsGlobalWindowOuter> window = nsGlobalWindowOuter::GetOuterWindowWithId(aWindowID);
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nsCOMPtr<nsPIDOMWindowOuter> outer = window ? window->AsOuter() : nullptr;
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outer.forget(aWindow);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowMediator::GetCurrentInnerWindowWithId(uint64_t aWindowID,
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mozIDOMWindow** aWindow)
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{
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RefPtr<nsGlobalWindowInner> window = nsGlobalWindowInner::GetInnerWindowWithId(aWindowID);
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// not found
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if (!window)
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return NS_OK;
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nsCOMPtr<nsPIDOMWindowInner> inner = window->AsInner();
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nsCOMPtr<nsPIDOMWindowOuter> outer = inner->GetOuterWindow();
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NS_ENSURE_TRUE(outer, NS_ERROR_UNEXPECTED);
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// outer is already using another inner, so it's same as not found
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if (outer->GetCurrentInnerWindow() != inner)
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return NS_OK;
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inner.forget(aWindow);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowMediator::UpdateWindowTimeStamp(nsIXULWindow* inWindow)
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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NS_ENSURE_STATE(mReady);
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nsWindowInfo *info = GetInfoFor(inWindow);
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if (info) {
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// increment the window's time stamp
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info->mTimeStamp = ++mTimeStamp;
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return NS_OK;
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}
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return NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowMediator::UpdateWindowTitle(nsIXULWindow* inWindow,
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const nsAString& inTitle)
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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NS_ENSURE_STATE(mReady);
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if (GetInfoFor(inWindow)) {
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ListenerArray::ForwardIterator iter(mListeners);
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while (iter.HasMore()) {
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iter.GetNext()->OnWindowTitleChange(inWindow, inTitle);
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}
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}
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return NS_OK;
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}
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/* This method's plan is to intervene only when absolutely necessary.
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We will get requests to place our windows behind unknown windows.
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For the most part, we need to leave those alone (turning them into
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explicit requests to be on top breaks Windows.) So generally we
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calculate a change as seldom as possible.
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*/
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NS_IMETHODIMP
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nsWindowMediator::CalculateZPosition(
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nsIXULWindow *inWindow,
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uint32_t inPosition,
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nsIWidget *inBelow,
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uint32_t *outPosition,
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nsIWidget **outBelow,
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bool *outAltered)
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{
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MOZ_RELEASE_ASSERT(NS_IsMainThread());
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NS_ENSURE_ARG_POINTER(outBelow);
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NS_ENSURE_STATE(mReady);
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*outBelow = nullptr;
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if (!inWindow || !outPosition || !outAltered)
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return NS_ERROR_NULL_POINTER;
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if (inPosition != nsIWindowMediator::zLevelTop &&
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inPosition != nsIWindowMediator::zLevelBottom &&
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inPosition != nsIWindowMediator::zLevelBelow)
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return NS_ERROR_INVALID_ARG;
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nsWindowInfo *info = mTopmostWindow;
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nsIXULWindow *belowWindow = nullptr;
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bool found = false;
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nsresult result = NS_OK;
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*outPosition = inPosition;
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*outAltered = false;
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if (mSortingZOrder) { // don't fight SortZOrder()
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*outBelow = inBelow;
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NS_IF_ADDREF(*outBelow);
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return NS_OK;
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}
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uint32_t inZ;
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GetZLevel(inWindow, &inZ);
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if (inPosition == nsIWindowMediator::zLevelBelow) {
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// locate inBelow. use topmost if it can't be found or isn't in the
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// z-order list
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info = GetInfoFor(inBelow);
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if (!info || (info->mYounger != info && info->mLower == info))
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info = mTopmostWindow;
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else
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found = true;
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if (!found) {
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/* Treat unknown windows as a request to be on top.
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Not as it should be, but that's what Windows gives us.
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Note we change inPosition, but not *outPosition. This forces
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us to go through the "on top" calculation just below, without
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necessarily changing the output parameters. */
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inPosition = nsIWindowMediator::zLevelTop;
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}
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}
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if (inPosition == nsIWindowMediator::zLevelTop) {
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if (mTopmostWindow && mTopmostWindow->mZLevel > inZ) {
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// asked for topmost, can't have it. locate highest allowed position.
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do {
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if (info->mZLevel <= inZ)
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break;
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info = info->mLower;
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} while (info != mTopmostWindow);
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*outPosition = nsIWindowMediator::zLevelBelow;
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belowWindow = info->mHigher->mWindow;
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*outAltered = true;
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}
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} else if (inPosition == nsIWindowMediator::zLevelBottom) {
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if (mTopmostWindow && mTopmostWindow->mHigher->mZLevel < inZ) {
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// asked for bottommost, can't have it. locate lowest allowed position.
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do {
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info = info->mHigher;
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if (info->mZLevel >= inZ)
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break;
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} while (info != mTopmostWindow);
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*outPosition = nsIWindowMediator::zLevelBelow;
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belowWindow = info->mWindow;
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*outAltered = true;
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}
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} else {
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unsigned long relativeZ;
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// check that we're in the right z-plane
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if (found) {
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belowWindow = info->mWindow;
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relativeZ = info->mZLevel;
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if (relativeZ > inZ) {
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// might be OK. is lower window, if any, lower?
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if (info->mLower != info && info->mLower->mZLevel > inZ) {
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do {
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if (info->mZLevel <= inZ)
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break;
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info = info->mLower;
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} while (info != mTopmostWindow);
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belowWindow = info->mHigher->mWindow;
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*outAltered = true;
|
|
}
|
|
} else if (relativeZ < inZ) {
|
|
// nope. look for a higher window to be behind.
|
|
do {
|
|
info = info->mHigher;
|
|
if (info->mZLevel >= inZ)
|
|
break;
|
|
} while (info != mTopmostWindow);
|
|
|
|
if (info->mZLevel >= inZ)
|
|
belowWindow = info->mWindow;
|
|
else
|
|
*outPosition = nsIWindowMediator::zLevelTop;
|
|
*outAltered = true;
|
|
} // else they're equal, so it's OK
|
|
}
|
|
}
|
|
|
|
if (NS_SUCCEEDED(result) && belowWindow) {
|
|
nsCOMPtr<nsIBaseWindow> base(do_QueryInterface(belowWindow));
|
|
if (base)
|
|
base->GetMainWidget(outBelow);
|
|
else
|
|
result = NS_ERROR_NO_INTERFACE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsWindowMediator::SetZPosition(
|
|
nsIXULWindow *inWindow,
|
|
uint32_t inPosition,
|
|
nsIXULWindow *inBelow)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
nsWindowInfo *inInfo,
|
|
*belowInfo;
|
|
|
|
if ((inPosition != nsIWindowMediator::zLevelTop &&
|
|
inPosition != nsIWindowMediator::zLevelBottom &&
|
|
inPosition != nsIWindowMediator::zLevelBelow) ||
|
|
!inWindow) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
if (mSortingZOrder) // don't fight SortZOrder()
|
|
return NS_OK;
|
|
|
|
NS_ENSURE_STATE(mReady);
|
|
|
|
/* Locate inWindow and unlink it from the z-order list.
|
|
It's important we look for it in the age list, not the z-order list.
|
|
This is because the former is guaranteed complete, while
|
|
now may be this window's first exposure to the latter. */
|
|
inInfo = GetInfoFor(inWindow);
|
|
if (!inInfo)
|
|
return NS_ERROR_INVALID_ARG;
|
|
|
|
// locate inBelow, place inWindow behind it
|
|
if (inPosition == nsIWindowMediator::zLevelBelow) {
|
|
belowInfo = GetInfoFor(inBelow);
|
|
// it had better also be in the z-order list
|
|
if (belowInfo &&
|
|
belowInfo->mYounger != belowInfo && belowInfo->mLower == belowInfo) {
|
|
belowInfo = nullptr;
|
|
}
|
|
if (!belowInfo) {
|
|
if (inBelow)
|
|
return NS_ERROR_INVALID_ARG;
|
|
else
|
|
inPosition = nsIWindowMediator::zLevelTop;
|
|
}
|
|
}
|
|
if (inPosition == nsIWindowMediator::zLevelTop ||
|
|
inPosition == nsIWindowMediator::zLevelBottom)
|
|
belowInfo = mTopmostWindow ? mTopmostWindow->mHigher : nullptr;
|
|
|
|
if (inInfo != belowInfo) {
|
|
inInfo->Unlink(false, true);
|
|
inInfo->InsertAfter(nullptr, belowInfo);
|
|
}
|
|
if (inPosition == nsIWindowMediator::zLevelTop)
|
|
mTopmostWindow = inInfo;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsWindowMediator::GetZLevel(nsIXULWindow *aWindow, uint32_t *_retval)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(_retval);
|
|
*_retval = nsIXULWindow::normalZ;
|
|
// This can fail during window destruction.
|
|
nsWindowInfo *info = GetInfoFor(aWindow);
|
|
if (info) {
|
|
*_retval = info->mZLevel;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsWindowMediator::SetZLevel(nsIXULWindow *aWindow, uint32_t aZLevel)
|
|
{
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
NS_ENSURE_STATE(mReady);
|
|
|
|
nsWindowInfo *info = GetInfoFor(aWindow);
|
|
NS_ASSERTION(info, "setting z level of unregistered window");
|
|
if (!info)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
if (info->mZLevel != aZLevel) {
|
|
bool lowered = info->mZLevel > aZLevel;
|
|
info->mZLevel = aZLevel;
|
|
if (lowered)
|
|
SortZOrderFrontToBack();
|
|
else
|
|
SortZOrderBackToFront();
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
/* Fix potentially out-of-order windows by performing an insertion sort
|
|
on the z-order list. The method will work no matter how broken the
|
|
list, but its assumed usage is immediately after one window's z level
|
|
has been changed, so one window is potentially out of place. Such a sort
|
|
is most efficiently done in a particular direction. Use this one
|
|
if a window's z level has just been reduced, so the sort is most efficiently
|
|
done front to back.
|
|
Note it's hardly worth going to all the trouble to write two versions
|
|
of this method except that if we choose the inefficient sorting direction,
|
|
on slow systems windows could visibly bubble around the window that
|
|
was moved.
|
|
*/
|
|
void
|
|
nsWindowMediator::SortZOrderFrontToBack()
|
|
{
|
|
nsWindowInfo *scan, // scans list looking for problems
|
|
*search, // searches for correct placement for scan window
|
|
*prev, // previous search element
|
|
*lowest; // bottom-most window in list
|
|
bool finished;
|
|
|
|
if (!mTopmostWindow) // early during program execution there's no z list yet
|
|
return; // there's also only one window, so this is not dangerous
|
|
|
|
mSortingZOrder = true;
|
|
|
|
/* Step through the list from top to bottom. If we find a window which
|
|
should be moved down in the list, move it to its highest legal position. */
|
|
do {
|
|
finished = true;
|
|
lowest = mTopmostWindow->mHigher;
|
|
scan = mTopmostWindow;
|
|
while (scan != lowest) {
|
|
uint32_t scanZ = scan->mZLevel;
|
|
if (scanZ < scan->mLower->mZLevel) { // out of order
|
|
search = scan->mLower;
|
|
do {
|
|
prev = search;
|
|
search = search->mLower;
|
|
} while (prev != lowest && scanZ < search->mZLevel);
|
|
|
|
// reposition |scan| within the list
|
|
if (scan == mTopmostWindow)
|
|
mTopmostWindow = scan->mLower;
|
|
scan->Unlink(false, true);
|
|
scan->InsertAfter(nullptr, prev);
|
|
|
|
// fix actual window order
|
|
nsCOMPtr<nsIBaseWindow> base;
|
|
nsCOMPtr<nsIWidget> scanWidget;
|
|
nsCOMPtr<nsIWidget> prevWidget;
|
|
base = do_QueryInterface(scan->mWindow);
|
|
if (base)
|
|
base->GetMainWidget(getter_AddRefs(scanWidget));
|
|
base = do_QueryInterface(prev->mWindow);
|
|
if (base)
|
|
base->GetMainWidget(getter_AddRefs(prevWidget));
|
|
if (scanWidget)
|
|
scanWidget->PlaceBehind(eZPlacementBelow, prevWidget, false);
|
|
|
|
finished = false;
|
|
break;
|
|
}
|
|
scan = scan->mLower;
|
|
}
|
|
} while (!finished);
|
|
|
|
mSortingZOrder = false;
|
|
}
|
|
|
|
// see comment for SortZOrderFrontToBack
|
|
void
|
|
nsWindowMediator::SortZOrderBackToFront()
|
|
{
|
|
nsWindowInfo *scan, // scans list looking for problems
|
|
*search, // searches for correct placement for scan window
|
|
*lowest; // bottom-most window in list
|
|
bool finished;
|
|
|
|
if (!mTopmostWindow) // early during program execution there's no z list yet
|
|
return; // there's also only one window, so this is not dangerous
|
|
|
|
mSortingZOrder = true;
|
|
|
|
/* Step through the list from bottom to top. If we find a window which
|
|
should be moved up in the list, move it to its lowest legal position. */
|
|
do {
|
|
finished = true;
|
|
lowest = mTopmostWindow->mHigher;
|
|
scan = lowest;
|
|
while (scan != mTopmostWindow) {
|
|
uint32_t scanZ = scan->mZLevel;
|
|
if (scanZ > scan->mHigher->mZLevel) { // out of order
|
|
search = scan;
|
|
do {
|
|
search = search->mHigher;
|
|
} while (search != lowest && scanZ > search->mZLevel);
|
|
|
|
// reposition |scan| within the list
|
|
if (scan != search && scan != search->mLower) {
|
|
scan->Unlink(false, true);
|
|
scan->InsertAfter(nullptr, search);
|
|
}
|
|
if (search == lowest)
|
|
mTopmostWindow = scan;
|
|
|
|
// fix actual window order
|
|
nsCOMPtr<nsIBaseWindow> base;
|
|
nsCOMPtr<nsIWidget> scanWidget;
|
|
nsCOMPtr<nsIWidget> searchWidget;
|
|
base = do_QueryInterface(scan->mWindow);
|
|
if (base)
|
|
base->GetMainWidget(getter_AddRefs(scanWidget));
|
|
if (mTopmostWindow != scan) {
|
|
base = do_QueryInterface(search->mWindow);
|
|
if (base)
|
|
base->GetMainWidget(getter_AddRefs(searchWidget));
|
|
}
|
|
if (scanWidget)
|
|
scanWidget->PlaceBehind(eZPlacementBelow, searchWidget, false);
|
|
finished = false;
|
|
break;
|
|
}
|
|
scan = scan->mHigher;
|
|
}
|
|
} while (!finished);
|
|
|
|
mSortingZOrder = false;
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS(nsWindowMediator,
|
|
nsIWindowMediator_44,
|
|
nsIWindowMediator,
|
|
nsIObserver,
|
|
nsISupportsWeakReference)
|
|
|
|
NS_IMETHODIMP
|
|
nsWindowMediator::AddListener(nsIWindowMediatorListener* aListener)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aListener);
|
|
|
|
mListeners.AppendElement(aListener);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsWindowMediator::RemoveListener(nsIWindowMediatorListener* aListener)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aListener);
|
|
|
|
mListeners.RemoveElement(aListener);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsWindowMediator::Observe(nsISupports* aSubject,
|
|
const char* aTopic,
|
|
const char16_t* aData)
|
|
{
|
|
if (!strcmp(aTopic, "xpcom-shutdown") && mReady) {
|
|
MOZ_RELEASE_ASSERT(NS_IsMainThread());
|
|
while (mOldestWindow)
|
|
UnregisterWindow(mOldestWindow);
|
|
mReady = false;
|
|
}
|
|
return NS_OK;
|
|
}
|