TrimItemModeRipple.cs
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using System;
using System.Linq;
using UnityEngine;
using UnityEngine.Timeline;
namespace UnityEditor.Timeline
{
class TrimItemModeRipple : ITrimItemMode, ITrimItemDrawer
{
double m_OriginalClipStart;
double m_OriginalClipEnd;
ITrimmable[] m_NextItems;
double m_BlendDuration;
double m_TrimStartShift;
public void OnBeforeTrim(ITrimmable item, TrimEdge trimDirection)
{
m_OriginalClipStart = item.start;
m_OriginalClipEnd = item.end;
m_TrimStartShift = 0.0;
var sortedClips = ItemsUtils.GetItemsExcept(item.parentTrack, new[] { item })
.OfType<ITrimmable>()
.OrderBy(c => c.start);
var clipStart = (DiscreteTime)item.start;
var clipEnd = (DiscreteTime)item.end;
m_NextItems = sortedClips.Where(c => (DiscreteTime)c.start >= clipStart && (DiscreteTime)c.end >= clipEnd).ToArray();
var overlapped = sortedClips.LastOrDefault(c => (DiscreteTime)c.start == clipStart && (DiscreteTime)c.end == clipEnd);
if (overlapped != null)
{
m_BlendDuration = overlapped.end - overlapped.start;
}
else
{
m_BlendDuration = 0.0;
var prevClip = sortedClips.LastOrDefault(c => (DiscreteTime)c.start <= clipStart && (DiscreteTime)c.end <= clipEnd);
if (prevClip != null)
m_BlendDuration += Math.Max(prevClip.end - item.start, 0.0);
var nextClip = sortedClips.FirstOrDefault(c => (DiscreteTime)c.start >= clipStart && (DiscreteTime)c.end >= clipEnd);
if (nextClip != null)
m_BlendDuration += Math.Max(item.end - nextClip.start, 0.0);
}
}
public void TrimStart(ITrimmable item, double time)
{
var prevEnd = item.end;
// HACK If time is negative, make sure we shift the SetStart operation to a positive space.
if (time < 0.0)
m_TrimStartShift = Math.Max(-time, m_TrimStartShift);
item.start = m_OriginalClipEnd - item.duration + m_TrimStartShift;
time += m_TrimStartShift;
if (m_BlendDuration > 0.0)
time = Math.Min(time, item.end - m_BlendDuration);
item.SetStart(time);
item.start = m_OriginalClipStart;
var offset = item.end - prevEnd;
foreach (var timelineClip in m_NextItems)
timelineClip.start += offset;
}
public void TrimEnd(ITrimmable item, double time, bool affectTimeScale)
{
var prevEnd = item.end;
if (m_BlendDuration > 0.0)
time = Math.Max(time, item.start + m_BlendDuration);
item.SetEnd(time, affectTimeScale);
var offset = item.end - prevEnd;
foreach (var timelineClip in m_NextItems)
timelineClip.start += offset;
}
public void DrawGUI(WindowState state, Rect bounds, Color color, TrimEdge edge)
{
EditModeGUIUtils.DrawBoundsEdge(bounds, color, edge);
TimelineCursors.SetCursor(TimelineCursors.CursorType.Ripple);
}
}
}