Merge branch 'master' into mod-test-improvements

osu.Game/Graphics/UserInterface/OsuTextBox.cs

@@ -2,13 +2,18 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using osu.Framework.Allocation;
+using osu.Framework.Audio.Track;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Graphics.UserInterface;
 using osu.Game.Graphics.Sprites;
 using osuTK.Graphics;
 using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics.Shapes;
 using osu.Framework.Input.Events;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Graphics.Containers;
+using osuTK;
 
 namespace osu.Game.Graphics.UserInterface
 {
@@ -59,5 +64,91 @@ namespace osu.Game.Graphics.UserInterface
         }
 
         protected override Drawable GetDrawableCharacter(char c) => new OsuSpriteText { Text = c.ToString(), Font = OsuFont.GetFont(size: CalculatedTextSize) };
+
+        protected override Caret CreateCaret() => new OsuCaret
+        {
+            CaretWidth = CaretWidth,
+            SelectionColour = SelectionColour,
+        };
+
+        private class OsuCaret : Caret
+        {
+            private const float caret_move_time = 60;
+
+            private readonly CaretBeatSyncedContainer beatSync;
+
+            public OsuCaret()
+            {
+                RelativeSizeAxes = Axes.Y;
+                Size = new Vector2(1, 0.9f);
+
+                Colour = Color4.Transparent;
+                Anchor = Anchor.CentreLeft;
+                Origin = Anchor.CentreLeft;
+
+                Masking = true;
+                CornerRadius = 1;
+                InternalChild = beatSync = new CaretBeatSyncedContainer
+                {
+                    RelativeSizeAxes = Axes.Both,
+                };
+            }
+
+            public override void Hide() => this.FadeOut(200);
+
+            public float CaretWidth { get; set; }
+
+            public Color4 SelectionColour { get; set; }
+
+            public override void DisplayAt(Vector2 position, float? selectionWidth)
+            {
+                beatSync.HasSelection = selectionWidth != null;
+
+                if (selectionWidth != null)
+                {
+                    this.MoveTo(new Vector2(position.X, position.Y), 60, Easing.Out);
+                    this.ResizeWidthTo(selectionWidth.Value + CaretWidth / 2, caret_move_time, Easing.Out);
+                    this.FadeColour(SelectionColour, 200, Easing.Out);
+                }
+                else
+                {
+                    this.MoveTo(new Vector2(position.X - CaretWidth / 2, position.Y), 60, Easing.Out);
+                    this.ResizeWidthTo(CaretWidth, caret_move_time, Easing.Out);
+                    this.FadeColour(Color4.White, 200, Easing.Out);
+                }
+            }
+
+            private class CaretBeatSyncedContainer : BeatSyncedContainer
+            {
+                private bool hasSelection;
+
+                public bool HasSelection
+                {
+                    set
+                    {
+                        hasSelection = value;
+                        if (value)
+
+                            this.FadeTo(0.5f, 200, Easing.Out);
+                    }
+                }
+
+                public CaretBeatSyncedContainer()
+                {
+                    MinimumBeatLength = 300;
+                    InternalChild = new Box
+                    {
+                        RelativeSizeAxes = Axes.Both,
+                        Colour = Color4.White,
+                    };
+                }
+
+                protected override void OnNewBeat(int beatIndex, TimingControlPoint timingPoint, EffectControlPoint effectPoint, TrackAmplitudes amplitudes)
+                {
+                    if (!hasSelection)
+                        this.FadeTo(0.7f).FadeTo(0.4f, timingPoint.BeatLength, Easing.InOutSine);
+                }
+            }
+        }
     }
 }