TrimItemModeReplace.cs
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using System;
using System.Linq;
using UnityEngine;
using UnityEngine.Timeline;
namespace UnityEditor.Timeline
{
class TrimItemModeReplace : ITrimItemMode, ITrimItemDrawer
{
ITrimmable m_Item;
ITrimmable m_ItemToBeReplaced;
double m_ClipOriginalEdgeValue;
bool m_TrimReplace;
double m_Min;
double m_Max;
public void OnBeforeTrim(ITrimmable item, TrimEdge trimDirection)
{
m_Item = item;
var sortedClips = ItemsUtils.GetItemsExcept(item.parentTrack, new[] { item })
.OfType<ITrimmable>()
.OrderBy(c => c.start);
var clipStart = (DiscreteTime)item.start;
var clipEnd = (DiscreteTime)item.end;
var overlapped = sortedClips.LastOrDefault(c => (DiscreteTime)c.start == clipStart && (DiscreteTime)c.end == clipEnd);
ITrimmable nextItem;
ITrimmable prevItem;
m_Min = 0.0;
m_Max = double.PositiveInfinity;
if (trimDirection == TrimEdge.Start)
{
nextItem = sortedClips.FirstOrDefault(c => (DiscreteTime)c.start >= clipStart && (DiscreteTime)c.end > clipEnd);
prevItem = sortedClips.LastOrDefault(c => (DiscreteTime)c.start <= clipStart && (DiscreteTime)c.end < clipEnd);
if (prevItem != null)
m_Min = prevItem.start + EditModeUtils.BlendDuration(prevItem, TrimEdge.Start) + TimelineClip.kMinDuration;
if (nextItem != null)
m_Max = nextItem.start;
m_ItemToBeReplaced = prevItem;
if (m_ItemToBeReplaced != null)
m_ClipOriginalEdgeValue = m_ItemToBeReplaced.end;
}
else
{
nextItem = sortedClips.FirstOrDefault(c => c != overlapped && (DiscreteTime)c.start >= clipStart && (DiscreteTime)c.end >= clipEnd);
prevItem = sortedClips.LastOrDefault(c => c != overlapped && (DiscreteTime)c.start <= clipStart && (DiscreteTime)c.end <= clipEnd);
if (prevItem != null)
m_Min = prevItem.end;
if (nextItem != null)
m_Max = nextItem.end - EditModeUtils.BlendDuration(nextItem, TrimEdge.End) - TimelineClip.kMinDuration;
m_ItemToBeReplaced = nextItem;
if (m_ItemToBeReplaced != null)
m_ClipOriginalEdgeValue = m_ItemToBeReplaced.start;
}
m_TrimReplace = false;
}
public void TrimStart(ITrimmable item, double time)
{
time = Math.Min(Math.Max(time, m_Min), m_Max);
if (m_ItemToBeReplaced != null)
{
if (!m_TrimReplace)
m_TrimReplace = item.start >= m_ItemToBeReplaced.end;
}
time = Math.Max(time, 0.0);
item.SetStart(time);
if (m_ItemToBeReplaced != null && m_TrimReplace)
{
var prevEnd = Math.Min(item.start, m_ClipOriginalEdgeValue);
m_ItemToBeReplaced.SetEnd(prevEnd, false);
}
}
public void TrimEnd(ITrimmable item, double time, bool affectTimeScale)
{
time = Math.Min(Math.Max(time, m_Min), m_Max);
if (m_ItemToBeReplaced != null)
{
if (!m_TrimReplace)
m_TrimReplace = item.end <= m_ItemToBeReplaced.start;
}
item.SetEnd(time, affectTimeScale);
if (m_ItemToBeReplaced != null && m_TrimReplace)
{
var nextStart = Math.Max(item.end, m_ClipOriginalEdgeValue);
m_ItemToBeReplaced.SetStart(nextStart);
}
}
public void DrawGUI(WindowState state, Rect bounds, Color color, TrimEdge edge)
{
bool shouldDraw = m_ItemToBeReplaced != null && (edge == TrimEdge.End && m_Item.end > m_ClipOriginalEdgeValue) ||
(edge == TrimEdge.Start && m_Item.start < m_ClipOriginalEdgeValue);
if (shouldDraw)
{
var cursorType = TimelineCursors.CursorType.Replace;
if (EditModeUtils.HasBlends(m_Item, edge))
{
color = DirectorStyles.kMixToolColor;
cursorType = (edge == TrimEdge.End)
? TimelineCursors.CursorType.MixRight
: TimelineCursors.CursorType.MixLeft;
}
EditModeGUIUtils.DrawBoundsEdge(bounds, color, edge);
TimelineCursors.SetCursor(cursorType);
}
else
{
TimelineCursors.ClearCursor();
}
}
}
}