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-rw-r--r--xpfe/appshell/nsWindowMediator.cpp846
1 files changed, 846 insertions, 0 deletions
diff --git a/xpfe/appshell/nsWindowMediator.cpp b/xpfe/appshell/nsWindowMediator.cpp
new file mode 100644
index 000000000..6d69bc764
--- /dev/null
+++ b/xpfe/appshell/nsWindowMediator.cpp
@@ -0,0 +1,846 @@
+/* -*- 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 "nsCOMPtr.h"
+#include "nsString.h"
+#include "nsReadableUtils.h"
+#include "nsUnicharUtils.h"
+#include "nsTArray.h"
+#include "nsIBaseWindow.h"
+#include "nsIWidget.h"
+#include "nsIDOMWindow.h"
+#include "nsIObserverService.h"
+#include "nsIServiceManager.h"
+#include "nsISimpleEnumerator.h"
+#include "nsAppShellWindowEnumerator.h"
+#include "nsWindowMediator.h"
+#include "nsIWindowMediatorListener.h"
+#include "nsXPIDLString.h"
+#include "nsGlobalWindow.h"
+
+#include "nsIDocShell.h"
+#include "nsIInterfaceRequestor.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsIXULWindow.h"
+
+using namespace mozilla;
+
+static bool notifyOpenWindow(nsIWindowMediatorListener *aElement, void* aData);
+static bool notifyCloseWindow(nsIWindowMediatorListener *aElement, void* aData);
+static bool notifyWindowTitleChange(nsIWindowMediatorListener *aElement, void* aData);
+
+// for notifyWindowTitleChange
+struct WindowTitleData {
+ nsIXULWindow* mWindow;
+ const char16_t *mTitle;
+};
+
+nsresult
+nsWindowMediator::GetDOMWindow(nsIXULWindow* inWindow,
+ nsCOMPtr<nsPIDOMWindowOuter>& outDOMWindow)
+{
+ nsCOMPtr<nsIDocShell> docShell;
+
+ outDOMWindow = nullptr;
+ inWindow->GetDocShell(getter_AddRefs(docShell));
+ NS_ENSURE_TRUE(docShell, NS_ERROR_FAILURE);
+
+ outDOMWindow = docShell->GetWindow();
+ return outDOMWindow ? NS_OK : NS_ERROR_FAILURE;
+}
+
+nsWindowMediator::nsWindowMediator() :
+ mEnumeratorList(), mOldestWindow(nullptr), mTopmostWindow(nullptr),
+ mTimeStamp(0), mSortingZOrder(false), mReady(false)
+{
+}
+
+nsWindowMediator::~nsWindowMediator()
+{
+ while (mOldestWindow)
+ UnregisterWindow(mOldestWindow);
+}
+
+nsresult nsWindowMediator::Init()
+{
+ nsresult rv;
+ nsCOMPtr<nsIObserverService> obsSvc =
+ do_GetService("@mozilla.org/observer-service;1", &rv);
+ NS_ENSURE_SUCCESS(rv, rv);
+ rv = obsSvc->AddObserver(this, "xpcom-shutdown", true);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ mReady = true;
+ return NS_OK;
+}
+
+NS_IMETHODIMP nsWindowMediator::RegisterWindow(nsIXULWindow* inWindow)
+{
+ MOZ_RELEASE_ASSERT(NS_IsMainThread());
+ NS_ENSURE_STATE(mReady);
+
+ if (GetInfoFor(inWindow)) {
+ NS_ERROR("multiple window registration");
+ return NS_ERROR_FAILURE;
+ }
+
+ mTimeStamp++;
+
+ // Create window info struct and add to list of windows
+ nsWindowInfo* windowInfo = new nsWindowInfo(inWindow, mTimeStamp);
+
+ WindowTitleData winData = { inWindow, nullptr };
+ mListeners.EnumerateForwards(notifyOpenWindow, &winData);
+
+ if (mOldestWindow)
+ windowInfo->InsertAfter(mOldestWindow->mOlder, nullptr);
+ else
+ mOldestWindow = windowInfo;
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWindowMediator::UnregisterWindow(nsIXULWindow* inWindow)
+{
+ MOZ_RELEASE_ASSERT(NS_IsMainThread());
+ NS_ENSURE_STATE(mReady);
+ nsWindowInfo *info = GetInfoFor(inWindow);
+ if (info)
+ return UnregisterWindow(info);
+ return NS_ERROR_INVALID_ARG;
+}
+
+nsresult
+nsWindowMediator::UnregisterWindow(nsWindowInfo *inInfo)
+{
+ // Inform the iterators
+ uint32_t index = 0;
+ while (index < mEnumeratorList.Length()) {
+ mEnumeratorList[index]->WindowRemoved(inInfo);
+ index++;
+ }
+
+ WindowTitleData winData = { inInfo->mWindow.get(), nullptr };
+ mListeners.EnumerateForwards(notifyCloseWindow, &winData);
+
+ // Remove from the lists and free up
+ if (inInfo == mOldestWindow)
+ mOldestWindow = inInfo->mYounger;
+ if (inInfo == mTopmostWindow)
+ mTopmostWindow = inInfo->mLower;
+ inInfo->Unlink(true, true);
+ if (inInfo == mOldestWindow)
+ mOldestWindow = nullptr;
+ if (inInfo == mTopmostWindow)
+ mTopmostWindow = nullptr;
+ delete inInfo;
+
+ return NS_OK;
+}
+
+nsWindowInfo*
+nsWindowMediator::GetInfoFor(nsIXULWindow *aWindow)
+{
+ nsWindowInfo *info,
+ *listEnd;
+
+ if (!aWindow)
+ return nullptr;
+
+ info = mOldestWindow;
+ listEnd = nullptr;
+ while (info != listEnd) {
+ if (info->mWindow.get() == aWindow)
+ return info;
+ info = info->mYounger;
+ listEnd = mOldestWindow;
+ }
+ return nullptr;
+}
+
+nsWindowInfo*
+nsWindowMediator::GetInfoFor(nsIWidget *aWindow)
+{
+ nsWindowInfo *info,
+ *listEnd;
+
+ if (!aWindow)
+ return nullptr;
+
+ info = mOldestWindow;
+ listEnd = nullptr;
+
+ nsCOMPtr<nsIWidget> scanWidget;
+ while (info != listEnd) {
+ nsCOMPtr<nsIBaseWindow> base(do_QueryInterface(info->mWindow));
+ if (base)
+ base->GetMainWidget(getter_AddRefs(scanWidget));
+ if (aWindow == scanWidget.get())
+ return info;
+ info = info->mYounger;
+ listEnd = mOldestWindow;
+ }
+ return nullptr;
+}
+
+NS_IMETHODIMP
+nsWindowMediator::GetEnumerator(const char16_t* inType, nsISimpleEnumerator** outEnumerator)
+{
+ MOZ_RELEASE_ASSERT(NS_IsMainThread());
+ NS_ENSURE_ARG_POINTER(outEnumerator);
+ NS_ENSURE_STATE(mReady);
+
+ RefPtr<nsAppShellWindowEnumerator> enumerator = new nsASDOMWindowEarlyToLateEnumerator(inType, *this);
+ enumerator.forget(outEnumerator);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWindowMediator::GetXULWindowEnumerator(const char16_t* inType, nsISimpleEnumerator** outEnumerator)
+{
+ MOZ_RELEASE_ASSERT(NS_IsMainThread());
+ NS_ENSURE_ARG_POINTER(outEnumerator);
+ NS_ENSURE_STATE(mReady);
+
+ RefPtr<nsAppShellWindowEnumerator> enumerator = new nsASXULWindowEarlyToLateEnumerator(inType, *this);
+ enumerator.forget(outEnumerator);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWindowMediator::GetZOrderDOMWindowEnumerator(
+ const char16_t *aWindowType, bool aFrontToBack,
+ nsISimpleEnumerator **_retval)
+{
+ MOZ_RELEASE_ASSERT(NS_IsMainThread());
+ NS_ENSURE_ARG_POINTER(_retval);
+ NS_ENSURE_STATE(mReady);
+
+ RefPtr<nsAppShellWindowEnumerator> enumerator;
+ if (aFrontToBack)
+ enumerator = new nsASDOMWindowFrontToBackEnumerator(aWindowType, *this);
+ else
+ enumerator = new nsASDOMWindowBackToFrontEnumerator(aWindowType, *this);
+
+ enumerator.forget(_retval);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWindowMediator::GetZOrderXULWindowEnumerator(
+ const char16_t *aWindowType, bool aFrontToBack,
+ nsISimpleEnumerator **_retval)
+{
+ MOZ_RELEASE_ASSERT(NS_IsMainThread());
+ NS_ENSURE_ARG_POINTER(_retval);
+ NS_ENSURE_STATE(mReady);
+
+ RefPtr<nsAppShellWindowEnumerator> enumerator;
+ if (aFrontToBack)
+ enumerator = new nsASXULWindowFrontToBackEnumerator(aWindowType, *this);
+ else
+ enumerator = new nsASXULWindowBackToFrontEnumerator(aWindowType, *this);
+
+ enumerator.forget(_retval);
+ return NS_OK;
+}
+
+int32_t
+nsWindowMediator::AddEnumerator(nsAppShellWindowEnumerator * inEnumerator)
+{
+ return mEnumeratorList.AppendElement(inEnumerator) != nullptr;
+}
+
+int32_t
+nsWindowMediator::RemoveEnumerator(nsAppShellWindowEnumerator * inEnumerator)
+{
+ return mEnumeratorList.RemoveElement(inEnumerator);
+}
+
+// Returns the window of type inType ( if null return any window type ) which has the most recent
+// time stamp
+NS_IMETHODIMP
+nsWindowMediator::GetMostRecentWindow(const char16_t* inType,
+ mozIDOMWindowProxy** outWindow)
+{
+ MOZ_RELEASE_ASSERT(NS_IsMainThread());
+ NS_ENSURE_ARG_POINTER(outWindow);
+ *outWindow = nullptr;
+ if (!mReady)
+ return NS_OK;
+
+ // Find the most window with the highest time stamp that matches
+ // the requested type
+ nsWindowInfo* info = MostRecentWindowInfo(inType, false);
+ if (info && info->mWindow) {
+ nsCOMPtr<nsPIDOMWindowOuter> DOMWindow;
+ if (NS_SUCCEEDED(GetDOMWindow(info->mWindow, DOMWindow))) {
+ DOMWindow.forget(outWindow);
+ return NS_OK;
+ }
+ return NS_ERROR_FAILURE;
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWindowMediator::GetMostRecentNonPBWindow(const char16_t* aType, mozIDOMWindowProxy** aWindow)
+{
+ MOZ_RELEASE_ASSERT(NS_IsMainThread());
+ NS_ENSURE_ARG_POINTER(aWindow);
+ *aWindow = nullptr;
+
+ nsWindowInfo *info = MostRecentWindowInfo(aType, true);
+ nsCOMPtr<nsPIDOMWindowOuter> domWindow;
+ if (info && info->mWindow) {
+ GetDOMWindow(info->mWindow, domWindow);
+ }
+
+ if (!domWindow) {
+ return NS_ERROR_FAILURE;
+ }
+
+ domWindow.forget(aWindow);
+ return NS_OK;
+}
+
+nsWindowInfo*
+nsWindowMediator::MostRecentWindowInfo(const char16_t* inType,
+ bool aSkipPrivateBrowsingOrClosed)
+{
+ int32_t lastTimeStamp = -1;
+ nsAutoString typeString(inType);
+ bool allWindows = !inType || typeString.IsEmpty();
+
+ // Find the most recent window with the highest time stamp that matches
+ // the requested type and has the correct browsing mode.
+ nsWindowInfo* searchInfo = mOldestWindow;
+ nsWindowInfo* listEnd = nullptr;
+ nsWindowInfo* foundInfo = nullptr;
+ for (; searchInfo != listEnd; searchInfo = searchInfo->mYounger) {
+ listEnd = mOldestWindow;
+
+ if (!allWindows && !searchInfo->TypeEquals(typeString)) {
+ continue;
+ }
+ if (searchInfo->mTimeStamp < lastTimeStamp) {
+ continue;
+ }
+ if (!searchInfo->mWindow) {
+ continue;
+ }
+ if (aSkipPrivateBrowsingOrClosed) {
+ nsCOMPtr<nsIDocShell> docShell;
+ searchInfo->mWindow->GetDocShell(getter_AddRefs(docShell));
+ nsCOMPtr<nsILoadContext> loadContext = do_QueryInterface(docShell);
+ if (!loadContext || loadContext->UsePrivateBrowsing()) {
+ continue;
+ }
+
+ nsCOMPtr<nsPIDOMWindowOuter> piwindow = docShell->GetWindow();
+ if (!piwindow || piwindow->Closed()) {
+ continue;
+ }
+ }
+
+ foundInfo = searchInfo;
+ lastTimeStamp = searchInfo->mTimeStamp;
+ }
+
+ return foundInfo;
+}
+
+NS_IMETHODIMP
+nsWindowMediator::GetOuterWindowWithId(uint64_t aWindowID,
+ mozIDOMWindowProxy** aWindow)
+{
+ RefPtr<nsGlobalWindow> window = nsGlobalWindow::GetOuterWindowWithId(aWindowID);
+ nsCOMPtr<nsPIDOMWindowOuter> outer = window ? window->AsOuter() : nullptr;
+ outer.forget(aWindow);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWindowMediator::GetCurrentInnerWindowWithId(uint64_t aWindowID,
+ mozIDOMWindow** aWindow)
+{
+ RefPtr<nsGlobalWindow> window = nsGlobalWindow::GetInnerWindowWithId(aWindowID);
+
+ // not found
+ if (!window)
+ return NS_OK;
+
+ nsCOMPtr<nsPIDOMWindowInner> inner = window->AsInner();
+ nsCOMPtr<nsPIDOMWindowOuter> outer = inner->GetOuterWindow();
+ NS_ENSURE_TRUE(outer, NS_ERROR_UNEXPECTED);
+
+ // outer is already using another inner, so it's same as not found
+ if (outer->GetCurrentInnerWindow() != inner)
+ return NS_OK;
+
+ inner.forget(aWindow);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWindowMediator::UpdateWindowTimeStamp(nsIXULWindow* inWindow)
+{
+ MOZ_RELEASE_ASSERT(NS_IsMainThread());
+ NS_ENSURE_STATE(mReady);
+ nsWindowInfo *info = GetInfoFor(inWindow);
+ if (info) {
+ // increment the window's time stamp
+ info->mTimeStamp = ++mTimeStamp;
+ return NS_OK;
+ }
+ return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsWindowMediator::UpdateWindowTitle(nsIXULWindow* inWindow,
+ const char16_t* inTitle)
+{
+ MOZ_RELEASE_ASSERT(NS_IsMainThread());
+ NS_ENSURE_STATE(mReady);
+ if (GetInfoFor(inWindow)) {
+ WindowTitleData winData = { inWindow, inTitle };
+ mListeners.EnumerateForwards(notifyWindowTitleChange, &winData);
+ }
+
+ return NS_OK;
+}
+
+/* This method's plan is to intervene only when absolutely necessary.
+ We will get requests to place our windows behind unknown windows.
+ For the most part, we need to leave those alone (turning them into
+ explicit requests to be on top breaks Windows.) So generally we
+ calculate a change as seldom as possible.
+*/
+NS_IMETHODIMP
+nsWindowMediator::CalculateZPosition(
+ nsIXULWindow *inWindow,
+ uint32_t inPosition,
+ nsIWidget *inBelow,
+ uint32_t *outPosition,
+ nsIWidget **outBelow,
+ bool *outAltered)
+{
+ MOZ_RELEASE_ASSERT(NS_IsMainThread());
+ NS_ENSURE_ARG_POINTER(outBelow);
+ NS_ENSURE_STATE(mReady);
+
+ *outBelow = nullptr;
+
+ if (!inWindow || !outPosition || !outAltered)
+ return NS_ERROR_NULL_POINTER;
+
+ if (inPosition != nsIWindowMediator::zLevelTop &&
+ inPosition != nsIWindowMediator::zLevelBottom &&
+ inPosition != nsIWindowMediator::zLevelBelow)
+ return NS_ERROR_INVALID_ARG;
+
+ nsWindowInfo *info = mTopmostWindow;
+ nsIXULWindow *belowWindow = nullptr;
+ bool found = false;
+ nsresult result = NS_OK;
+
+ *outPosition = inPosition;
+ *outAltered = false;
+
+ if (mSortingZOrder) { // don't fight SortZOrder()
+ *outBelow = inBelow;
+ NS_IF_ADDREF(*outBelow);
+ return NS_OK;
+ }
+
+ uint32_t inZ;
+ GetZLevel(inWindow, &inZ);
+
+ if (inPosition == nsIWindowMediator::zLevelBelow) {
+ // locate inBelow. use topmost if it can't be found or isn't in the
+ // z-order list
+ info = GetInfoFor(inBelow);
+ if (!info || (info->mYounger != info && info->mLower == info))
+ info = mTopmostWindow;
+ else
+ found = true;
+
+ if (!found) {
+ /* Treat unknown windows as a request to be on top.
+ Not as it should be, but that's what Windows gives us.
+ Note we change inPosition, but not *outPosition. This forces
+ us to go through the "on top" calculation just below, without
+ necessarily changing the output parameters. */
+ inPosition = nsIWindowMediator::zLevelTop;
+ }
+ }
+
+ if (inPosition == nsIWindowMediator::zLevelTop) {
+ if (mTopmostWindow && mTopmostWindow->mZLevel > inZ) {
+ // asked for topmost, can't have it. locate highest allowed position.
+ do {
+ if (info->mZLevel <= inZ)
+ break;
+ info = info->mLower;
+ } while (info != mTopmostWindow);
+
+ *outPosition = nsIWindowMediator::zLevelBelow;
+ belowWindow = info->mHigher->mWindow;
+ *outAltered = true;
+ }
+ } else if (inPosition == nsIWindowMediator::zLevelBottom) {
+ if (mTopmostWindow && mTopmostWindow->mHigher->mZLevel < inZ) {
+ // asked for bottommost, can't have it. locate lowest allowed position.
+ do {
+ info = info->mHigher;
+ if (info->mZLevel >= inZ)
+ break;
+ } while (info != mTopmostWindow);
+
+ *outPosition = nsIWindowMediator::zLevelBelow;
+ belowWindow = info->mWindow;
+ *outAltered = true;
+ }
+ } else {
+ unsigned long relativeZ;
+
+ // check that we're in the right z-plane
+ if (found) {
+ belowWindow = info->mWindow;
+ relativeZ = info->mZLevel;
+ if (relativeZ > inZ) {
+ // might be OK. is lower window, if any, lower?
+ if (info->mLower != info && info->mLower->mZLevel > inZ) {
+ do {
+ if (info->mZLevel <= inZ)
+ break;
+ info = info->mLower;
+ } while (info != mTopmostWindow);
+
+ belowWindow = info->mHigher->mWindow;
+ *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;
+ nsWindowInfo *info = GetInfoFor(aWindow);
+ if (info) {
+ *_retval = info->mZLevel;
+ } else {
+ NS_WARNING("getting z level of unregistered window");
+ // this goes off during window destruction
+ }
+ 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.AppendObject(aListener);
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWindowMediator::RemoveListener(nsIWindowMediatorListener* aListener)
+{
+ NS_ENSURE_ARG_POINTER(aListener);
+
+ mListeners.RemoveObject(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;
+}
+
+bool
+notifyOpenWindow(nsIWindowMediatorListener *aListener, void* aData)
+{
+ WindowTitleData* winData = static_cast<WindowTitleData*>(aData);
+ aListener->OnOpenWindow(winData->mWindow);
+
+ return true;
+}
+
+bool
+notifyCloseWindow(nsIWindowMediatorListener *aListener, void* aData)
+{
+ WindowTitleData* winData = static_cast<WindowTitleData*>(aData);
+ aListener->OnCloseWindow(winData->mWindow);
+
+ return true;
+}
+
+bool
+notifyWindowTitleChange(nsIWindowMediatorListener *aListener, void* aData)
+{
+ WindowTitleData* titleData = reinterpret_cast<WindowTitleData*>(aData);
+ aListener->OnWindowTitleChange(titleData->mWindow, titleData->mTitle);
+
+ return true;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-25 10:49:05 +0000