Initial commit

Library/PackageCache/com.unity.timeline@1.2.18/Editor/treeview/ManipulationsTimeline.cs

@@ -0,0 +1,287 @@
+using System;
+using System.Linq;
+using UnityEditor.ShortcutManagement;
+using UnityEngine;
+
+namespace UnityEditor.Timeline
+{
+    class TimelinePanManipulator : Manipulator
+    {
+        const float k_MaxPanSpeed = 50.0f;
+        bool m_Active;
+
+        protected override bool MouseDown(Event evt, WindowState state)
+        {
+            if ((evt.button == 2 && evt.modifiers == EventModifiers.None) ||
+                (evt.button == 0 && evt.modifiers == EventModifiers.Alt))
+            {
+                TimelineCursors.SetCursor(TimelineCursors.CursorType.Pan);
+
+                m_Active = true;
+                return true;
+            }
+
+            return false;
+        }
+
+        protected override bool MouseUp(Event evt, WindowState state)
+        {
+            if (m_Active)
+            {
+                TimelineCursors.ClearCursor();
+                state.editorWindow.Repaint();
+            }
+
+            return false;
+        }
+
+        protected override bool MouseDrag(Event evt, WindowState state)
+        {
+            // Note: Do not rely on evt.button here as some 3rd party automation
+            //       software does not properly set the button data during drag.
+
+            if (!m_Active)
+                return false;
+
+            return Pan(evt, state);
+        }
+
+        protected override bool MouseWheel(Event evt, WindowState state)
+        {
+            if (Math.Abs(evt.delta.x) < 1e-5 || Math.Abs(evt.delta.x) <= Math.Abs(evt.delta.y))
+                return false;
+
+            TimelineZoomManipulator.InvalidateWheelZoom();
+
+            var panEvent = new Event(evt);
+            panEvent.delta = new Vector2(panEvent.delta.x * k_MaxPanSpeed * -1.0f, 0.0f);
+
+            return Pan(panEvent, state);
+        }
+
+        static bool Pan(Event evt, WindowState state)
+        {
+            var cursorRect = TimelineWindow.instance.sequenceContentRect;
+            cursorRect.xMax = TimelineWindow.instance.position.xMax;
+            cursorRect.yMax = TimelineWindow.instance.position.yMax;
+
+            if (state.GetWindow() != null && state.GetWindow().treeView != null)
+            {
+                var scroll = state.GetWindow().treeView.scrollPosition;
+                scroll.y -= evt.delta.y;
+                state.GetWindow().treeView.scrollPosition = scroll;
+                state.OffsetTimeArea((int)evt.delta.x);
+                return true;
+            }
+
+            return false;
+        }
+    }
+
+
+    class TimelineZoomManipulator : Manipulator
+    {
+        Vector2 m_MouseDownPos = Vector2.zero;
+        Vector2 m_InitialShownRange = Vector2.zero;
+        float m_FocalTime;
+        float m_LastMouseMoveX = -1;
+        float m_ZoomFactor = 1;
+        bool m_WheelUsedLast;
+
+        TimelineZoomManipulator() {}
+
+        public static readonly TimelineZoomManipulator Instance = new TimelineZoomManipulator();
+
+        internal void DoZoom(float zoomFactor, WindowState state)
+        {
+            var refRange = state.timeAreaShownRange;
+            DoZoom(zoomFactor, state, refRange, (refRange.x + refRange.y) / 2);
+            // Force resetting the reference zoom after a Framing operation
+            InvalidateWheelZoom();
+        }
+
+        static void DoZoom(float zoomFactor, WindowState state, Vector2 refRange, float focalTime)
+        {
+            const float kMinRange = 0.05f; // matches zoomable area.
+
+            var s = zoomFactor;
+            if (s <= 0) return;
+
+            var t = Mathf.Max(focalTime, refRange.x);
+            var x = (refRange.x + t * (s - 1)) / s;
+            var y = (refRange.y + t * (s - 1)) / s;
+
+            // don't set it if we reach the limit or panning happens
+            if (Math.Abs(x - y) > kMinRange)
+            {
+                // Zoomable area does not protect 100% against crazy values
+                state.SetTimeAreaShownRange(
+                    Math.Max(x, -WindowConstants.timeAreaShownRangePadding),
+                    Math.Min(y, WindowState.kMaxShownTime));
+            }
+        }
+
+        internal static void InvalidateWheelZoom()
+        {
+            Instance.m_WheelUsedLast = false;
+        }
+
+        protected override bool MouseDown(Event evt, WindowState state)
+        {
+            m_MouseDownPos = evt.mousePosition;
+            m_FocalTime = state.PixelToTime(m_MouseDownPos.x);
+            m_InitialShownRange = state.timeAreaShownRange;
+            return false;
+        }
+
+        protected override bool MouseWheel(Event evt, WindowState state)
+        {
+            if (Math.Abs(evt.delta.y) < 1e-5)
+                return false;
+
+            var zoomRect = TimelineWindow.instance.sequenceContentRect;
+            zoomRect.yMax += TimelineWindow.instance.horizontalScrollbarHeight;
+
+            if (!zoomRect.Contains(evt.mousePosition))
+                return false;
+
+            if (!m_WheelUsedLast || Mathf.Abs(m_LastMouseMoveX - evt.mousePosition.x) > 1.0f)
+            {
+                m_LastMouseMoveX = evt.mousePosition.x;
+                m_FocalTime = state.PixelToTime(m_LastMouseMoveX);
+                m_InitialShownRange = state.timeAreaShownRange;
+                m_ZoomFactor = 1;
+            }
+
+            var newZoom = m_ZoomFactor * (-evt.delta.y * 0.02f + 1);
+            newZoom = Mathf.Clamp(newZoom, 1e-7f, 1e7f);
+
+            var lastRange = state.timeAreaShownRange;
+            DoZoom(newZoom, state, m_InitialShownRange, m_FocalTime);
+
+            // if we hit a limit, don't change the zoom
+            //  this prevents accumulating when zoom doesn't change
+            if (lastRange != state.timeAreaShownRange)
+                m_ZoomFactor = newZoom;
+
+            m_WheelUsedLast = true;
+            return true;
+        }
+
+        protected override bool MouseDrag(Event evt, WindowState state)
+        {
+            // Fast zoom...
+            if (evt.modifiers != EventModifiers.Alt || evt.button != 1) return false;
+
+            var mouseMoveLength = Event.current.mousePosition - m_MouseDownPos;
+            var delta = Math.Abs(mouseMoveLength.x) > Math.Abs(mouseMoveLength.y)
+                ? mouseMoveLength.x
+                : -mouseMoveLength.y;
+            m_ZoomFactor = PixelToZoom(delta);
+            DoZoom(m_ZoomFactor, state, m_InitialShownRange, m_FocalTime);
+
+            m_WheelUsedLast = false;
+            return true;
+        }
+
+        static float PixelToZoom(float x)
+        {
+            const float pixel2Zoom = 1 / 300.0f;
+            x *=  pixel2Zoom;
+            if (x < -0.75)
+            {
+                // Rational function that behaves like 1+x on [-0.75,inf) and asymptotically reaches zero on (-inf,-0.75]
+                // The coefficients were obtained by the following constraints:
+                //1) f(-0.75) = 0.25
+                //2) f'(-0.75) = 1 C1 continuity
+                //3) f(-3) = 0.001 (asymptotically zero)
+                return 1 / (98.6667f + 268.444f * x + 189.63f * x * x);
+            }
+            return 1 + x;
+        }
+    }
+
+    class TimelineShortcutManipulator : Manipulator
+    {
+        protected override bool ValidateCommand(Event evt, WindowState state)
+        {
+            return evt.commandName == EventCommandNames.Copy ||
+                evt.commandName == EventCommandNames.Paste ||
+                evt.commandName == EventCommandNames.Duplicate ||
+                evt.commandName == EventCommandNames.SelectAll ||
+                evt.commandName == EventCommandNames.Delete ||
+                evt.commandName == EventCommandNames.SoftDelete ||
+                evt.commandName == EventCommandNames.FrameSelected;
+        }
+
+        protected override bool ExecuteCommand(Event evt, WindowState state)
+        {
+            if (state.IsCurrentEditingASequencerTextField())
+                return false;
+
+            if (evt.commandName == EventCommandNames.SelectAll)
+            {
+                TimelineAction.Invoke<SelectAllAction>(state);
+                return true;
+            }
+
+            if (evt.commandName == EventCommandNames.SoftDelete)
+            {
+                TimelineAction.Invoke<DeleteAction>(state);
+                return true;
+            }
+
+            if (evt.commandName == EventCommandNames.FrameSelected)
+            {
+                TimelineAction.Invoke<FrameSelectedAction>(state);
+                return true;
+            }
+
+            return TimelineAction.HandleShortcut(state, evt);
+        }
+    }
+
+    class InlineCurvesShortcutManipulator : Manipulator
+    {
+        protected override bool ExecuteCommand(Event evt, WindowState state)
+        {
+            if (state.IsCurrentEditingASequencerTextField())
+                return false;
+
+            var inlineCurveEditor = SelectionManager.GetCurrentInlineEditorCurve();
+            if (inlineCurveEditor == null || !inlineCurveEditor.inlineCurvesSelected)
+                return false;
+
+            if (evt.commandName != EventCommandNames.FrameSelected)
+                return false;
+
+            TimelineAction.Invoke<FrameSelectedAction>(state);
+            return true;
+        }
+
+        // CurveEditor uses an hardcoded shortcut to execute the FrameAll action, preventing the ShortcutManager from
+        // ever picking it up. We have to hijack it to ensure our code is being run when framing inline curves.
+        protected override bool KeyDown(Event evt, WindowState state)
+        {
+            var inlineCurveEditor = SelectionManager.GetCurrentInlineEditorCurve();
+            if (inlineCurveEditor == null || !inlineCurveEditor.inlineCurvesSelected)
+                return false;
+
+            // Not conflicting with the hardcoded value
+            if (evt.keyCode != KeyCode.A)
+                return false;
+
+            var combination = ShortcutManager.instance.GetShortcutBinding(Shortcuts.Timeline.frameAll)
+                .keyCombinationSequence.ToList();
+
+            var shortcutCombination = combination.First();
+            var currentCombination = KeyCombination.FromKeyboardInput(evt);
+
+            // User is not actually pressing the correct key combination for FrameAll
+            if (combination.Count == 1 && shortcutCombination.Equals(currentCombination))
+                TimelineAction.Invoke<FrameAllAction>(state);
+
+            return true;
+        }
+    }
+}