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diff --git a/toolkit/xre/nsNativeAppSupportCocoa.mm b/toolkit/xre/nsNativeAppSupportCocoa.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 "nsString.h"
+
+#import <CoreServices/CoreServices.h>
+#import <Cocoa/Cocoa.h>
+
+#include "nsCOMPtr.h"
+#include "nsCocoaFeatures.h"
+#include "nsNativeAppSupportBase.h"
+#include "nsServiceManagerUtils.h"
+
+#include "nsIBaseWindow.h"
+#include "nsCommandLine.h"
+#include "mozIDOMWindow.h"
+#include "nsIWebNavigation.h"
+#include "nsIWidget.h"
+#include "nsIWindowMediator.h"
+#include "nsPIDOMWindow.h"
+#include "WidgetUtils.h"
+
+// This must be included last:
+#include "nsObjCExceptions.h"
+
+using mozilla::widget::WidgetUtils;
+
+nsresult GetNativeWindowPointerFromDOMWindow(mozIDOMWindowProxy* a_window,
+ NSWindow** a_nativeWindow) {
+ *a_nativeWindow = nil;
+ if (!a_window) return NS_ERROR_INVALID_ARG;
+
+ nsPIDOMWindowOuter* win = nsPIDOMWindowOuter::From(a_window);
+ nsCOMPtr<nsIWidget> widget = WidgetUtils::DOMWindowToWidget(win);
+ if (!widget) {
+ return NS_ERROR_FAILURE;
+ }
+
+ *a_nativeWindow = (NSWindow*)widget->GetNativeData(NS_NATIVE_WINDOW);
+
+ return NS_OK;
+}
+
+class nsNativeAppSupportCocoa : public nsNativeAppSupportBase {
+ public:
+ nsNativeAppSupportCocoa() : mCanShowUI(false) {}
+
+ NS_IMETHOD Start(bool* aRetVal) override;
+ NS_IMETHOD ReOpen() override;
+ NS_IMETHOD Enable() override;
+
+ private:
+ bool mCanShowUI;
+};
+
+NS_IMETHODIMP
+nsNativeAppSupportCocoa::Enable() {
+ mCanShowUI = true;
+ return NS_OK;
+}
+
+NS_IMETHODIMP nsNativeAppSupportCocoa::Start(bool* _retval) {
+ int major, minor, bugfix;
+ nsCocoaFeatures::GetSystemVersion(major, minor, bugfix);
+
+ NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
+
+ // Check that the OS version is supported, if not return false,
+ // which will make the browser quit. In principle we could display an
+ // alert here. But the alert's message and buttons would require custom
+ // localization. So (for now at least) we just log an English message
+ // to the console before quitting.
+ if (major < 10 || (major == 10 && minor < 12)) {
+ NSLog(@"Minimum OS version requirement not met!");
+ return NS_OK;
+ }
+
+ *_retval = true;
+
+ return NS_OK;
+
+ NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE);
+}
+
+NS_IMETHODIMP
+nsNativeAppSupportCocoa::ReOpen() {
+ NS_OBJC_BEGIN_TRY_BLOCK_RETURN;
+
+ if (!mCanShowUI) return NS_ERROR_FAILURE;
+
+ bool haveNonMiniaturized = false;
+ bool haveOpenWindows = false;
+ bool done = false;
+
+ nsCOMPtr<nsIWindowMediator> wm(do_GetService(NS_WINDOWMEDIATOR_CONTRACTID));
+ if (!wm) {
+ return NS_ERROR_FAILURE;
+ } else {
+ nsCOMPtr<nsISimpleEnumerator> windowList;
+ wm->GetAppWindowEnumerator(nullptr, getter_AddRefs(windowList));
+ bool more;
+ windowList->HasMoreElements(&more);
+ while (more) {
+ nsCOMPtr<nsISupports> nextWindow = nullptr;
+ windowList->GetNext(getter_AddRefs(nextWindow));
+ nsCOMPtr<nsIBaseWindow> baseWindow(do_QueryInterface(nextWindow));
+ if (!baseWindow) {
+ windowList->HasMoreElements(&more);
+ continue;
+ } else {
+ haveOpenWindows = true;
+ }
+
+ nsCOMPtr<nsIWidget> widget = nullptr;
+ baseWindow->GetMainWidget(getter_AddRefs(widget));
+ if (!widget || !widget->IsVisible()) {
+ windowList->HasMoreElements(&more);
+ continue;
+ }
+ NSWindow* cocoaWindow = (NSWindow*)widget->GetNativeData(NS_NATIVE_WINDOW);
+ if (![cocoaWindow isMiniaturized]) {
+ haveNonMiniaturized = true;
+ break; // have un-minimized windows, nothing to do
+ }
+ windowList->HasMoreElements(&more);
+ } // end while
+
+ if (!haveNonMiniaturized) {
+ // Prioritize browser windows for deminiaturization
+ nsCOMPtr<mozIDOMWindowProxy> mru;
+ wm->GetMostRecentBrowserWindow(getter_AddRefs(mru));
+
+ // Failing that, deminiaturize the most recently used window
+ if (!mru) {
+ wm->GetMostRecentWindow(nullptr, getter_AddRefs(mru));
+ }
+
+ if (mru) {
+ NSWindow* cocoaMru = nil;
+ GetNativeWindowPointerFromDOMWindow(mru, &cocoaMru);
+ if (cocoaMru) {
+ [cocoaMru deminiaturize:nil];
+ done = true;
+ }
+ }
+ } // end if have non miniaturized
+
+ if (!haveOpenWindows && !done) {
+ char* argv[] = {nullptr};
+
+ // use an empty command line to make the right kind(s) of window open
+ nsCOMPtr<nsICommandLineRunner> cmdLine(new nsCommandLine());
+
+ nsresult rv;
+ rv = cmdLine->Init(0, argv, nullptr, nsICommandLine::STATE_REMOTE_EXPLICIT);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ return cmdLine->Run();
+ }
+
+ } // got window mediator
+ return NS_OK;
+
+ NS_OBJC_END_TRY_BLOCK_RETURN(NS_ERROR_FAILURE);
+}
+
+#pragma mark -
+
+// Create and return an instance of class nsNativeAppSupportCocoa.
+nsresult NS_CreateNativeAppSupport(nsINativeAppSupport** aResult) {
+ *aResult = new nsNativeAppSupportCocoa;
+ if (!*aResult) return NS_ERROR_OUT_OF_MEMORY;
+
+ NS_ADDREF(*aResult);
+ return NS_OK;
+}