Implement open in file browser for Linux (#4677)

* Add support to open folder browser for Linux
* PAL'ified DesktopUtilities.cpp

Signed-off-by: Steve Pham <spham@amazon.com>

Code/Framework/AzQtComponents/AzQtComponents/Platform/Linux/platform_linux_files.cmake

@@ -12,6 +12,7 @@ set(FILES
     ../../Utilities/QtWindowUtilities_linux.cpp
     ../../Utilities/ScreenGrabber_linux.cpp
     ../../../Platform/Linux/AzQtComponents/Components/StyledDockWidget_Linux.cpp
+    ../../../Platform/Linux/AzQtComponents/Utilities/DesktopUtilities_Linux.cpp
     ../../../Platform/Linux/AzQtComponents/AzQtComponents_Traits_Linux.h
     ../../../Platform/Linux/AzQtComponents/AzQtComponents_Traits_Platform.h
 )

Code/Framework/AzQtComponents/AzQtComponents/Platform/Mac/platform_mac_files.cmake

@@ -12,6 +12,7 @@ set(FILES
     ../../Utilities/QtWindowUtilities_mac.mm
     ../../Utilities/ScreenGrabber_mac.mm
     ../../../Platform/Mac/AzQtComponents/Components/StyledDockWidget_Mac.cpp
+    ../../../Platform/Mac/AzQtComponents/Utilities/DesktopUtilities_Mac.cpp
     ../../../Platform/Mac/AzQtComponents/AzQtComponents_Traits_Mac.h
     ../../../Platform/Mac/AzQtComponents/AzQtComponents_Traits_Platform.h
 )

Code/Framework/AzQtComponents/AzQtComponents/Platform/Windows/platform_windows_files.cmake

@@ -9,6 +9,7 @@
 set(FILES
     ../../natvis/qt.natvis
     ../../../Platform/Windows/AzQtComponents/Utilities/HandleDpiAwareness_Windows.cpp
+    ../../../Platform/Windows/AzQtComponents/Utilities/DesktopUtilities_Windows.cpp
     ../../Utilities/MouseHider_win.cpp
     ../../Utilities/QtWindowUtilities_win.cpp
     ../../Utilities/ScreenGrabber_win.cpp

Code/Framework/AzQtComponents/AzQtComponents/azqtcomponents_files.cmake

@@ -271,7 +271,6 @@ set(FILES
     Utilities/ColorUtilities.h
     Utilities/Conversions.h
     Utilities/Conversions.cpp
-    Utilities/DesktopUtilities.cpp
     Utilities/DesktopUtilities.h
     Utilities/HandleDpiAwareness.cpp
     Utilities/HandleDpiAwareness.h

Code/Framework/AzQtComponents/Platform/Linux/AzQtComponents/Utilities/DesktopUtilities_Linux.cpp

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#include <AzQtComponents/Utilities/DesktopUtilities.h>
+
+#include <QDir>
+#include <QProcess>
+
+namespace AzQtComponents
+{
+    void ShowFileOnDesktop(const QString& path)
+    {
+        const char* defaultNautilusPath = "/usr/bin/nautilus";
+        const char* defaultXdgOpenPath = "/usr/bin/xdg-open";
+
+        // Determine if Nautilus (for Gnome Desktops) is available because it supports opening the file manager 
+        // and selecting a specific file
+        bool nautilusAvailable = QFileInfo(defaultNautilusPath).exists();
+
+        QFileInfo pathInfo(path);
+        if (pathInfo.isDir())
+        {
+            QProcess::startDetached(defaultXdgOpenPath, { path });
+        }
+        else
+        {
+            if (nautilusAvailable)
+            {
+                QProcess::startDetached(defaultNautilusPath, { "--select", path });
+            }
+            else
+            {
+                QDir parentDir { pathInfo.dir() };
+                QProcess::startDetached(defaultXdgOpenPath, { parentDir.path() });
+            }
+        }
+    }
+
+    QString fileBrowserActionName()
+    {
+        const char* exploreActionName = "Open in file browser";
+        return QObject::tr(exploreActionName);
+    }
+}

Code/Framework/AzQtComponents/Platform/Mac/AzQtComponents/Utilities/DesktopUtilities_Mac.cpp

@@ -15,21 +15,6 @@ namespace AzQtComponents
 {
     void ShowFileOnDesktop(const QString& path)
     {
-#if defined(AZ_PLATFORM_WINDOWS)
-
-        // Launch explorer at the path provided
-        QStringList args;
-        if (!QFileInfo(path).isDir())
-        {
-            // Folders are just opened, files are selected
-            args << "/select,";
-        }
-        args << QDir::toNativeSeparators(path);
-
-        QProcess::startDetached("explorer", args);
-
-#else
-
         if (QFileInfo(path).isDir())
         {
             QProcess::startDetached("/usr/bin/osascript", { "-e",
@@ -43,19 +28,11 @@ namespace AzQtComponents
 
         QProcess::startDetached("/usr/bin/osascript", { "-e",
                     QStringLiteral("tell application \"Finder\" to activate") });
-
-#endif
     }
 
     QString fileBrowserActionName()
     {
-#ifdef AZ_PLATFORM_WINDOWS
-        const char* exploreActionName = "Open in Explorer";
-#elif defined(AZ_PLATFORM_MAC)
         const char* exploreActionName = "Open in Finder";
-#else
-        const char* exploreActionName = "Open in file browser";
-#endif
         return QObject::tr(exploreActionName);
     }
 }

Code/Framework/AzQtComponents/Platform/Windows/AzQtComponents/Utilities/DesktopUtilities_Windows.cpp

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#include <AzQtComponents/Utilities/DesktopUtilities.h>
+
+#include <QDir>
+#include <QProcess>
+
+namespace AzQtComponents
+{
+    void ShowFileOnDesktop(const QString& path)
+    {
+        // Launch explorer at the path provided
+        QStringList args;
+        if (!QFileInfo(path).isDir())
+        {
+            // Folders are just opened, files are selected
+            args << "/select,";
+        }
+        args << QDir::toNativeSeparators(path);
+
+        QProcess::startDetached("explorer", args);
+    }
+
+    QString fileBrowserActionName()
+    {
+        const char* exploreActionName = "Open in Explorer";
+        return QObject::tr(exploreActionName);
+    }
+}