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ResultViewModel.cs
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ResultViewModel.cs
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// Copyright (c) Microsoft Corporation
// The Microsoft Corporation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Threading.Tasks;
using System.Windows.Input;
using System.Windows.Media;
using PowerLauncher.Helper;
using PowerLauncher.Plugin;
using Wox.Infrastructure.Image;
using Wox.Infrastructure.UserSettings;
using Wox.Plugin;
using Wox.Plugin.Logger;
namespace PowerLauncher.ViewModel
{
public class ResultViewModel : BaseModel
{
public enum ActivationType
{
Selection,
Hover,
}
private readonly PowerToysRunSettings _settings;
public ObservableCollection<ContextMenuItemViewModel> ContextMenuItems { get; } = new ObservableCollection<ContextMenuItemViewModel>();
public ICommand ActivateContextButtonsHoverCommand { get; }
public ICommand DeactivateContextButtonsHoverCommand { get; }
public bool IsSelected { get; private set; }
public bool IsHovered { get; private set; }
private bool _areContextButtonsActive;
private ImageSource _image;
private volatile bool _imageLoaded;
public bool AreContextButtonsActive
{
get => _areContextButtonsActive;
set
{
if (_areContextButtonsActive != value)
{
_areContextButtonsActive = value;
OnPropertyChanged(nameof(AreContextButtonsActive));
}
}
}
private int _contextMenuSelectedIndex;
public int ContextMenuSelectedIndex
{
get => _contextMenuSelectedIndex;
set
{
if (_contextMenuSelectedIndex != value)
{
_contextMenuSelectedIndex = value;
OnPropertyChanged(nameof(ContextMenuSelectedIndex));
}
}
}
public const int NoSelectionIndex = -1;
public ResultViewModel(Result result, IMainViewModel mainViewModel, PowerToysRunSettings settings)
{
if (result != null)
{
Result = result;
}
_settings = settings;
ContextMenuSelectedIndex = NoSelectionIndex;
LoadContextMenu();
ActivateContextButtonsHoverCommand = new RelayCommand(ActivateContextButtonsHoverAction);
DeactivateContextButtonsHoverCommand = new RelayCommand(DeactivateContextButtonsHoverAction);
MainViewModel = mainViewModel;
}
private void ActivateContextButtonsHoverAction(object sender)
{
ActivateContextButtons(ActivationType.Hover);
}
public void ActivateContextButtons(ActivationType activationType)
{
// Result does not contain any context menu items - we don't need to show the context menu ListView at all.
if (ContextMenuItems.Count > 0)
{
AreContextButtonsActive = true;
}
else
{
AreContextButtonsActive = false;
}
if (activationType == ActivationType.Selection)
{
IsSelected = true;
EnableContextMenuAcceleratorKeys();
}
else if (activationType == ActivationType.Hover)
{
IsHovered = true;
}
}
private void DeactivateContextButtonsHoverAction(object sender)
{
DeactivateContextButtons(ActivationType.Hover);
}
public void DeactivateContextButtons(ActivationType activationType)
{
if (activationType == ActivationType.Selection)
{
IsSelected = false;
DisableContextMenuAcceleratorkeys();
}
else if (activationType == ActivationType.Hover)
{
IsHovered = false;
}
// Result does not contain any context menu items - we don't need to show the context menu ListView at all.
if (ContextMenuItems?.Count > 0)
{
AreContextButtonsActive = IsSelected || IsHovered;
}
else
{
AreContextButtonsActive = false;
}
}
public void LoadContextMenu()
{
var results = PluginManager.GetContextMenusForPlugin(Result);
ContextMenuItems.Clear();
foreach (var r in results)
{
ContextMenuItems.Add(new ContextMenuItemViewModel(
r.PluginName,
r.Title,
r.Glyph,
r.FontFamily,
r.AcceleratorKey,
r.AcceleratorModifiers,
new RelayCommand(_ =>
{
bool hideWindow =
r.Action != null &&
r.Action(new ActionContext
{
SpecialKeyState = KeyboardHelper.CheckModifiers(),
});
if (hideWindow)
{
MainViewModel.Hide();
}
})));
}
}
private void EnableContextMenuAcceleratorKeys()
{
foreach (var i in ContextMenuItems)
{
i.IsAcceleratorKeyEnabled = true;
}
}
private void DisableContextMenuAcceleratorkeys()
{
foreach (var i in ContextMenuItems)
{
i.IsAcceleratorKeyEnabled = false;
}
}
public ImageSource Image
{
get
{
if (!_imageLoaded)
{
_imageLoaded = true;
_ = LoadImageAsync();
}
return _image;
}
private set
{
_image = value;
OnPropertyChanged(nameof(Image));
}
}
private async Task<ImageSource> LoadImageInternalAsync(string imagePath, Result.IconDelegate icon, bool loadFullImage)
{
if (string.IsNullOrEmpty(imagePath) && icon != null)
{
try
{
var image = icon();
return image;
}
catch (Exception e)
{
Log.Exception(
$"IcoPath is empty and exception when calling Icon() for result <{Result.Title}> of plugin <{Result.PluginDirectory}>",
e,
System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
imagePath = ImageLoader.ErrorIconPath;
}
}
return await ImageLoader.LoadAsync(imagePath, _settings.GenerateThumbnailsFromFiles, loadFullImage).ConfigureAwait(false);
}
private async Task LoadImageAsync()
{
var imagePath = Result.IcoPath;
var iconDelegate = Result.Icon;
Image = await LoadImageInternalAsync(imagePath, iconDelegate, false).ConfigureAwait(false);
}
// Returns false if we've already reached the last item.
public bool SelectNextContextButton()
{
if (ContextMenuSelectedIndex == (ContextMenuItems.Count - 1))
{
ContextMenuSelectedIndex = NoSelectionIndex;
return false;
}
ContextMenuSelectedIndex++;
return true;
}
// Returns false if we've already reached the first item.
public bool SelectPrevContextButton()
{
if (ContextMenuSelectedIndex == NoSelectionIndex)
{
return false;
}
ContextMenuSelectedIndex--;
return true;
}
public void SelectLastContextButton()
{
ContextMenuSelectedIndex = ContextMenuItems.Count - 1;
}
public bool HasSelectedContextButton()
{
var isContextSelected = ContextMenuSelectedIndex != NoSelectionIndex;
return isContextSelected;
}
/// <summary>
/// Triggers the action on the selected context button
/// </summary>
/// <returns>False if there is nothing selected, otherwise true</returns>
public bool ExecuteSelectedContextButton()
{
if (HasSelectedContextButton())
{
ContextMenuItems[ContextMenuSelectedIndex].Command.Execute(null);
return true;
}
return false;
}
public Result Result { get; }
public IMainViewModel MainViewModel { get; }
public override bool Equals(object obj)
{
var r = obj as ResultViewModel;
if (r != null)
{
return Result.Equals(r.Result);
}
else
{
return false;
}
}
public override int GetHashCode()
{
return Result.GetHashCode();
}
public string SearchBoxDisplayText()
{
return Result.QueryTextDisplay;
}
public override string ToString()
{
// Using CurrentCulture since this is user facing
var contextMenuInfo = ContextMenuItems.Count > 0 ? string.Format(CultureInfo.CurrentCulture, "{0} {1}", ContextMenuItems.Count, Properties.Resources.ContextMenuItemsAvailable) : string.Empty;
return string.Format(CultureInfo.CurrentCulture, "{0}, {1}", Result.ToString(), contextMenuInfo);
}
}
}