Added adaptive layout modes

Files/BaseLayout.cs

@@ -1,5 +1,6 @@
 using Files.Common;
 using Files.DataModels;
+using Files.EventArguments;
 using Files.Extensions;
 using Files.Filesystem;
 using Files.Helpers;
@@ -283,7 +284,7 @@ public virtual void SetItemOpacity(ListedItem item)
 
         protected abstract ListedItem GetItemFromElement(object element);
 
-        private void FolderSettings_LayoutModeChangeRequested(object sender, EventArgs e)
+        private void FolderSettings_LayoutModeChangeRequested(object sender, LayoutModeEventArgs e)
         {
             if (ParentShellPageInstance.ContentPage != null)
             {

Files/Enums/FolderLayout.cs

@@ -0,0 +1,11 @@
+namespace Files.Enums
+{
+    public enum FolderLayout
+    {
+        DetailsView = 0,
+        TilesView = 1,
+        GridViewSmall = 2,
+        GridViewMedium = 4,
+        GridViewLarge = 8
+    }
+}

Files/Enums/FolderLayoutModes.cs

@@ -2,8 +2,8 @@
 {
     public enum FolderLayoutModes
     {
-        DetailsView = 0,
-        TilesView,
-        GridView
+        DetailsView = 1,
+        TilesView = 2,
+        GridView = 4,
     }
 }

Files/EventArguments/LayoutModeEventArgs.cs

@@ -0,0 +1,17 @@
+using Files.Enums;
+
+namespace Files.EventArguments
+{
+    public class LayoutModeEventArgs
+    {
+        public readonly FolderLayoutModes LayoutMode;
+
+        public readonly int GridViewSize;
+
+        internal LayoutModeEventArgs(FolderLayoutModes layoutMode, int gridViewSize)
+        {
+            LayoutMode = layoutMode;
+            GridViewSize = gridViewSize;
+        }
+    }
+}

Files/Files.csproj

@@ -177,6 +177,7 @@
     </Compile>
     <Compile Include="Enums\DynamicDialogButtons.cs" />
     <Compile Include="Enums\DynamicDialogResult.cs" />
+    <Compile Include="Enums\FolderLayout.cs" />
     <Compile Include="Enums\FolderLayoutModes.cs" />
     <Compile Include="Extensions\TaskExtensions.cs" />
     <Compile Include="Filesystem\FolderHelpers.cs" />
@@ -185,7 +186,9 @@
     <Compile Include="Filesystem\StorageEnumerators\UniversalStorageEnumerator.cs" />
     <Compile Include="Filesystem\StorageEnumerators\Win32StorageEnumerator.cs" />
     <Compile Include="Enums\FileSystemStatusCode.cs" />
+    <Compile Include="EventArguments\LayoutModeEventArgs.cs" />
     <Compile Include="Filesystem\CloudDrivesManager.cs" />
+    <Compile Include="Helpers\AdaptiveLayoutHelpers.cs" />
     <Compile Include="Filesystem\Cloud\Providers\OneDriveSharePointCloudProvider.cs" />
     <Compile Include="Filesystem\NetworkDrivesManager.cs" />
     <Compile Include="Helpers\AppServiceConnectionHelper.cs" />
@@ -219,6 +222,7 @@
     <Compile Include="Helpers\ExtensionManager.cs" />
     <Compile Include="Helpers\IntervalSampler.cs" />
     <Compile Include="Helpers\RegistryHelper.cs" />
+	<Compile Include="Helpers\XamlHelpers\SystemTypeToXaml.cs" />
     <Compile Include="UserControls\FilePreviews\BasicPreview.xaml.cs">
       <DependentUpon>BasicPreview.xaml</DependentUpon>
     </Compile>

Files/Helpers/AdaptiveLayoutHelpers.cs

@@ -0,0 +1,131 @@
+using System;
+using System.Linq;
+using Windows.Storage;
+using System.Windows.Input;
+using Files.ViewModels.Previews;
+using Files.ViewModels;
+
+namespace Files.Helpers
+{
+    public static class AdaptiveLayoutHelpers
+    {
+        public static bool PredictLayoutMode(FolderSettingsViewModel folderSettings, ItemViewModel filesystemViewModel)
+        {
+            if (App.AppSettings.AreLayoutPreferencesPerFolder && App.AppSettings.AdaptiveLayoutEnabled && !folderSettings.LayoutPreference.IsAdaptiveLayoutOverridden)
+            {
+                bool desktopIniFound = false;
+
+                var iniPath = System.IO.Path.Combine(filesystemViewModel.CurrentFolder.ItemPath, "desktop.ini");
+                var iniContents = NativeFileOperationsHelper.ReadStringFromFile(iniPath)?.Trim();
+                if (!string.IsNullOrEmpty(iniContents))
+                {
+                    var parser = new IniParser.Parser.IniDataParser();
+                    parser.Configuration.ThrowExceptionsOnError = false;
+                    var data = parser.Parse(iniContents);
+                    if (data != null)
+                    {
+                        var viewModeSection = data.Sections.FirstOrDefault(x => "ViewState".Equals(x.SectionName, StringComparison.OrdinalIgnoreCase));
+                        if (viewModeSection != null)
+                        {
+                            var folderTypeKey = viewModeSection.Keys.FirstOrDefault(s => "FolderType".Equals(s.KeyName, StringComparison.OrdinalIgnoreCase));
+                            if (folderTypeKey != null)
+                            {
+                                switch (folderTypeKey.Value)
+                                {
+                                    case "Documents":
+                                        {
+                                            folderSettings.ToggleLayoutModeTiles.Execute(false);
+                                            break;
+                                        }
+
+                                    case "Pictures":
+                                        {
+                                            folderSettings.ToggleLayoutModeGridView.Execute(folderSettings.GridViewSize);
+                                            break;
+                                        }
+
+                                    case "Music":
+                                        {
+                                            folderSettings.ToggleLayoutModeDetailsView.Execute(false);
+                                            break;
+                                        }
+
+                                    case "Videos":
+                                        {
+                                            folderSettings.ToggleLayoutModeGridView.Execute(folderSettings.GridViewSize);
+                                            break;
+                                        }
+
+                                    default:
+                                        {
+                                            folderSettings.ToggleLayoutModeDetailsView.Execute(false);
+                                            break;
+                                        }
+                                }
+
+                                desktopIniFound = true;
+                            }
+                        }
+                    }
+                }
+
+                if (desktopIniFound)
+                {
+                    return true;
+                }
+                if (filesystemViewModel.FilesAndFolders.Count == 0)
+                {
+                    return false;
+                }
+
+                int imagesAndVideosCount = filesystemViewModel.FilesAndFolders.Where((item) =>
+
+                    !string.IsNullOrEmpty(item.FileExtension)
+
+                    // Images
+                    && (ImagePreviewViewModel.Extensions.Any((ext) => item.FileExtension.Equals(ext, StringComparison.OrdinalIgnoreCase))
+
+                    // Audio & Video
+                    || MediaPreviewViewModel.Extensions.Any((ext) => item.FileExtension.Equals(ext, StringComparison.OrdinalIgnoreCase))
+                    )).Count();
+
+                int foldersCount = filesystemViewModel.FilesAndFolders.Where((item) => item.PrimaryItemAttribute == StorageItemTypes.Folder).Count();
+
+                int otherFilesCount = filesystemViewModel.FilesAndFolders.Count - (imagesAndVideosCount + foldersCount);
+
+                if (foldersCount > 0)
+                { // There are folders in current directory
+
+                    if ((filesystemViewModel.FilesAndFolders.Count - imagesAndVideosCount) < (filesystemViewModel.FilesAndFolders.Count - 20) || (filesystemViewModel.FilesAndFolders.Count <= 20 && imagesAndVideosCount >= 5))
+                    { // Most of items are images/videos
+                        folderSettings.ToggleLayoutModeTiles.Execute(false);
+                    }
+                    else
+                    {
+                        folderSettings.ToggleLayoutModeDetailsView.Execute(false);
+                    }
+                }
+                else
+                { // There are only files
+
+                    if (imagesAndVideosCount == filesystemViewModel.FilesAndFolders.Count)
+                    { // Only images/videos
+                        folderSettings.ToggleLayoutModeGridView.Execute(folderSettings.GridViewSize);
+                    }
+                    else if (otherFilesCount < 20)
+                    { // Most of files are images/videos
+                        folderSettings.ToggleLayoutModeTiles.Execute(false);
+                    }
+                    else
+                    { // Images/videos and other files
+                        folderSettings.ToggleLayoutModeDetailsView.Execute(false);
+                    }
+                }
+
+                return true;
+            }
+
+            return false;
+        }
+    }
+}

Files/Helpers/NativeFileOperationsHelper.cs

@@ -1,4 +1,5 @@
 using System;
+using System.IO;
 using System.Runtime.InteropServices;
 using System.Runtime.InteropServices.ComTypes;
 using System.Text;
@@ -204,9 +205,13 @@ public static string ReadStringFromFile(string filePath)
                 fixed (byte* pBuff = buff)
                 {
                     ReadFile(hStream, pBuff, 4096 - 1, &dwBytesRead, IntPtr.Zero);
-                    str = Encoding.UTF8.GetString(pBuff, dwBytesRead);
+                    //str = Encoding.UTF8.GetString(pBuff, dwBytesRead);
                 }
             }
+            using (var reader = new StreamReader(new MemoryStream(buff, 0, dwBytesRead), true))
+            {
+                str = reader.ReadToEnd();
+            }
             CloseHandle(hStream);
             return str;
         }

Files/Helpers/XamlHelpers/SystemTypeToXaml.cs

@@ -0,0 +1,30 @@
+using Windows.UI.Xaml.Markup;
+
+namespace Files.Helpers.XamlHelpers
+{
+    public class SystemTypeToXaml : MarkupExtension
+    {
+        #region Private Members
+
+        private object parameter;
+
+        #endregion
+
+        #region Public Properties
+
+        public int Int { set => parameter = value; }
+
+        public double Double { set => parameter = value; }
+
+        public float Float { set => parameter = value; }
+
+        public bool Bool { set => parameter = value; }
+
+        #endregion
+
+        protected override object ProvideValue()
+        {
+            return parameter;
+        }
+    }
+}

Files/UserControls/StatusBarControl.xaml

@@ -10,6 +10,7 @@
     xmlns:lottie="using:Microsoft.Toolkit.Uwp.UI.Lottie"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     xmlns:muxc="using:Microsoft.UI.Xaml.Controls"
+    xmlns:xh="using:Files.Helpers.XamlHelpers"
     d:DesignHeight="40"
     d:DesignWidth="400"
     mc:Ignorable="d">
@@ -18,7 +19,7 @@
             <ResourceDictionary.MergedDictionaries>
                 <ResourceDictionary Source="/ResourceDictionaries/ToolbarButtonStyle.xaml" />
             </ResourceDictionary.MergedDictionaries>
-            <converters:LayoutModeToBoolConverter x:Key="LayoutModeBoolConverter" />
+            <converters:LayoutModeToBoolConverter x:Key="LayoutModeConverter" />
         </ResourceDictionary>
     </UserControl.Resources>
 
@@ -149,14 +150,16 @@
                                 x:Uid="StatusBarControlLayoutMode"
                                 FontWeight="Medium"
                                 Text="Layout Mode" />
+
                             <StackPanel Orientation="Horizontal" Spacing="4">
                                 <RadioButton
                                     x:Uid="StatusBarControlDetailsView"
                                     Height="32"
                                     MinWidth="0"
                                     Command="{x:Bind FolderSettings.ToggleLayoutModeDetailsView}"
+                                    CommandParameter="{xh:SystemTypeToXaml Bool=True}"
                                     CornerRadius="4"
-                                    IsChecked="{x:Bind FolderSettings.LayoutModeInformation, Converter={StaticResource LayoutModeBoolConverter}, Mode=OneWay, ConverterParameter=DetailsInfo}"
+                                    IsChecked="{x:Bind FolderSettings.LayoutModeInformation, Converter={StaticResource LayoutModeConverter}, Mode=OneWay, ConverterParameter=DetailsInfo}"
                                     Style="{StaticResource ToggleButtonRevealStyle}"
                                     ToolTipService.ToolTip="Details View">
                                     <FontIcon
@@ -169,8 +172,9 @@
                                     Height="32"
                                     MinWidth="0"
                                     Command="{x:Bind FolderSettings.ToggleLayoutModeTiles}"
+                                    CommandParameter="{xh:SystemTypeToXaml Bool=True}"
                                     CornerRadius="4"
-                                    IsChecked="{x:Bind FolderSettings.LayoutModeInformation, Converter={StaticResource LayoutModeBoolConverter}, Mode=OneWay, ConverterParameter=TilesInfo}"
+                                    IsChecked="{x:Bind FolderSettings.LayoutModeInformation, Converter={StaticResource LayoutModeConverter}, Mode=OneWay, ConverterParameter=TilesInfo}"
                                     Style="{StaticResource ToggleButtonRevealStyle}"
                                     ToolTipService.ToolTip="Tiles View">
                                     <FontIcon
@@ -185,8 +189,9 @@
                                     HorizontalAlignment="Center"
                                     VerticalAlignment="Center"
                                     Command="{x:Bind FolderSettings.ToggleLayoutModeGridViewSmall}"
+                                    CommandParameter="{xh:SystemTypeToXaml Bool=True}"
                                     CornerRadius="4"
-                                    IsChecked="{x:Bind FolderSettings.LayoutModeInformation, Converter={StaticResource LayoutModeBoolConverter}, Mode=OneWay, ConverterParameter=SmallGridInfo}"
+                                    IsChecked="{x:Bind FolderSettings.LayoutModeInformation, Converter={StaticResource LayoutModeConverter}, Mode=OneWay, ConverterParameter=SmallGridInfo}"
                                     Style="{StaticResource ToggleButtonRevealStyle}"
                                     ToolTipService.ToolTip="Grid View (Small)">
                                     <FontIcon
@@ -201,8 +206,9 @@
                                     MinWidth="0"
                                     Margin="0"
                                     Command="{x:Bind FolderSettings.ToggleLayoutModeGridViewMedium}"
+                                    CommandParameter="{xh:SystemTypeToXaml Bool=True}"
                                     CornerRadius="4"
-                                    IsChecked="{x:Bind FolderSettings.LayoutModeInformation, Converter={StaticResource LayoutModeBoolConverter}, Mode=OneWay, ConverterParameter=MediumGridInfo}"
+                                    IsChecked="{x:Bind FolderSettings.LayoutModeInformation, Converter={StaticResource LayoutModeConverter}, Mode=OneWay, ConverterParameter=MediumGridInfo}"
                                     Style="{StaticResource ToggleButtonRevealStyle}"
                                     ToolTipService.ToolTip="Grid View (Medium)">
                                     <FontIcon
@@ -216,8 +222,9 @@
                                     Height="32"
                                     MinWidth="0"
                                     Command="{x:Bind FolderSettings.ToggleLayoutModeGridViewLarge}"
+                                    CommandParameter="{xh:SystemTypeToXaml Bool=True}"
                                     CornerRadius="4"
-                                    IsChecked="{x:Bind FolderSettings.LayoutModeInformation, Converter={StaticResource LayoutModeBoolConverter}, Mode=OneWay, ConverterParameter=LargeGridInfo}"
+                                    IsChecked="{x:Bind FolderSettings.LayoutModeInformation, Converter={StaticResource LayoutModeConverter}, Mode=OneWay, ConverterParameter=LargeGridInfo}"
                                     Style="{StaticResource ToggleButtonRevealStyle}"
                                     ToolTipService.ToolTip="Grid View (Large)">
                                     <FontIcon