changed settings saving (#3)

Reviewed-on: #3
Co-authored-by: Aleksandr Neychev <alexnejchev73@gmail.com>

CursorLang.Core/Models/PopupModeSettings.cs

@@ -0,0 +1,141 @@
+using System.Drawing;
+using System.Text.Json.Serialization;
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace CursorLang.Core.Models;
+
+/// <summary>
+/// The settings of one placement mode: where the popup goes and how it looks there.
+/// </summary>
+/// <remarks>
+/// Every mode keeps a set of its own. The popup next to the caret sits inside a text
+/// being read and is wanted small and quiet; the one in the corner of the monitor is
+/// looked for on purpose and is wanted large. A look shared by the modes meant setting
+/// it up again after every switch — and switching modes to see what they do undid what
+/// had just been set up.
+///
+/// The colours are <see cref="System.Drawing.Color"/> for the same reason as in
+/// <see cref="AppSettings"/>: the agent reads them and must stay clear of WPF.
+/// </remarks>
+public abstract partial class PopupModeSettings : ObservableObject
+{
+    /// <summary>The distance from whatever the popup is placed by, in WPF units.</summary>
+    [ObservableProperty]
+    private double _offset = 16;
+
+    /// <summary>The size of the layout name in the popup, in WPF units.</summary>
+    [ObservableProperty]
+    private double _fontSize = 20;
+
+    /// <summary>The popup opacity: 1.0 is fully opaque.</summary>
+    [ObservableProperty]
+    private double _opacity = 0.9;
+
+    /// <summary>The fill of the popup. The opacity is set by <see cref="Opacity"/>.</summary>
+    [ObservableProperty]
+    private Color _backgroundColor = Color.FromArgb(0xFF, 0x20, 0x20, 0x20);
+
+    /// <summary>The colour of the layout name in the popup.</summary>
+    [ObservableProperty]
+    private Color _foregroundColor = Color.FromArgb(0xFF, 0xFF, 0xFF, 0xFF);
+
+    /// <summary>
+    /// Takes the offset and the look of another mode over. What tells the modes apart —
+    /// the side, the place on the monitor — is copied by the mode itself.
+    /// </summary>
+    protected void CopyLookFrom(PopupModeSettings other)
+    {
+        Offset = other.Offset;
+        FontSize = other.FontSize;
+        Opacity = other.Opacity;
+        BackgroundColor = other.BackgroundColor;
+        ForegroundColor = other.ForegroundColor;
+    }
+}
+
+/// <summary>The mode that puts the popup next to the mouse cursor.</summary>
+public sealed partial class CursorModeSettings : PopupModeSettings
+{
+    /// <summary>The corner or the side of the cursor the popup is put on.</summary>
+    [ObservableProperty]
+    private AnchorSide _side = AnchorSide.BottomRight;
+
+    /// <summary>Takes the values of another mode of the same kind over.</summary>
+    public void CopyFrom(CursorModeSettings other)
+    {
+        CopyLookFrom(other);
+        Side = other.Side;
+    }
+}
+
+/// <summary>
+/// The mode that puts the popup next to the caret of the active input field.
+/// </summary>
+public sealed partial class CaretModeSettings : PopupModeSettings
+{
+    /// <summary>The side of the caret the popup is put on: only left or right.</summary>
+    [ObservableProperty]
+    private CaretSide _side = CaretSide.Right;
+
+    /// <summary>
+    /// The side as the layout arithmetic wants it. Both of them line the popup up with
+    /// the caret rather than putting it above or below.
+    /// </summary>
+    [JsonIgnore]
+    public AnchorSide Anchor => Side == CaretSide.Left ? AnchorSide.Left : AnchorSide.Right;
+
+    /// <summary>Takes the values of another mode of the same kind over.</summary>
+    public void CopyFrom(CaretModeSettings other)
+    {
+        CopyLookFrom(other);
+        Side = other.Side;
+    }
+
+    // The side decides what the popup is lined up against, so it is a change of that too
+    partial void OnSideChanged(CaretSide value) => OnPropertyChanged(nameof(Anchor));
+}
+
+/// <summary>
+/// The mode that puts the popup at a fixed place of the monitor holding the active
+/// window. Here <see cref="PopupModeSettings.Offset"/> is the distance from the edge
+/// of the monitor.
+/// </summary>
+/// <remarks>
+/// In the middle of the monitor there is no edge to keep a distance from, so the offset
+/// is zero there and the settings window does not offer it. Choosing the middle puts it
+/// back to zero rather than remembering it for later: a setting that is not shown must
+/// not be one that still applies.
+/// </remarks>
+public sealed partial class FixedPointModeSettings : PopupModeSettings
+{
+    /// <summary>The place on the monitor the popup is put at.</summary>
+    [ObservableProperty]
+    private ScreenPosition _position = ScreenPosition.Center;
+
+    public FixedPointModeSettings()
+    {
+        // The middle is the default, and it has no edge to stand off from
+        Offset = 0;
+    }
+
+    /// <summary>Whether the popup is put at an edge of the monitor rather than in its middle.</summary>
+    [JsonIgnore]
+    public bool IsAtAnEdge => Position != ScreenPosition.Center;
+
+    /// <summary>Takes the values of another mode of the same kind over.</summary>
+    public void CopyFrom(FixedPointModeSettings other)
+    {
+        CopyLookFrom(other);
+        Position = other.Position;
+    }
+
+    partial void OnPositionChanged(ScreenPosition value)
+    {
+        OnPropertyChanged(nameof(IsAtAnEdge));
+
+        if (value == ScreenPosition.Center)
+        {
+            Offset = 0;
+        }
+    }
+}