/// <summary>
/// Determines whether two specified <see cref="MidiEvent"/> objects have the same content using
/// the specified comparison settings.
/// </summary>
/// <param name="midiEvent1">The first event to compare, or <c>null</c>.</param>
/// <param name="midiEvent2">The second event to compare, or <c>null</c>.</param>
/// <param name="settings">Settings according to which events should be compared.</param>
/// <param name="message">Message containing information about what exactly is different in
/// <paramref name="midiEvent1"/> and <paramref name="midiEvent2"/>.</param>
/// <returns><c>true</c> if the <paramref name="midiEvent1"/> is equal to the <paramref name="midiEvent2"/>;
/// otherwise, <c>false</c>.</returns>
public static bool Equals(MidiEvent midiEvent1, MidiEvent midiEvent2, MidiEventEqualityCheckSettings settings, out string message)
{
return(MidiEventEquality.Equals(midiEvent1, midiEvent2, settings ?? new MidiEventEqualityCheckSettings(), out message));
}
/// <summary>
/// Initializes a new instance of the <see cref="MidiEventEqualityComparer"/> with the
/// specified settings according to which <see cref="MidiEvent"/> objects should
/// be compared for equality.
/// </summary>
/// <param name="settings">Settings according to which <see cref="MidiEvent"/> objects should
/// be compared for equality.</param>
public MidiEventEqualityComparer(MidiEventEqualityCheckSettings settings)
{
_settings = settings ?? new MidiEventEqualityCheckSettings();
}
/// <summary>
/// Determines whether two specified <see cref="MidiEvent"/> objects have the same content.
/// </summary>
/// <param name="midiEvent1">The first event to compare, or <c>null</c>.</param>
/// <param name="midiEvent2">The second event to compare, or <c>null</c>.</param>
/// <param name="settings">Settings according to which events should be compared.</param>
/// <returns><c>true</c> if the <paramref name="midiEvent1"/> is equal to the <paramref name="midiEvent2"/>;
/// otherwise, <c>false</c>.</returns>
public static bool Equals(MidiEvent midiEvent1, MidiEvent midiEvent2, MidiEventEqualityCheckSettings settings)
{
string message;
return(Equals(midiEvent1, midiEvent2, settings, out message));
}
public static bool Equals(MidiEvent midiEvent1, MidiEvent midiEvent2, MidiEventEqualityCheckSettings settings, out string message)
{
message = null;
if (ReferenceEquals(midiEvent1, midiEvent2))
{
return(true);
}
if (ReferenceEquals(null, midiEvent1) || ReferenceEquals(null, midiEvent2))
{
message = "One of events is null.";
return(false);
}
if (settings.CompareDeltaTimes)
{
var deltaTime1 = midiEvent1.DeltaTime;
var deltaTime2 = midiEvent2.DeltaTime;
if (deltaTime1 != deltaTime2)
{
message = $"Delta-times are different ({deltaTime1} vs {deltaTime2}).";
return(false);
}
}
var type1 = midiEvent1.GetType();
var type2 = midiEvent2.GetType();
if (type1 != type2)
{
message = $"Types of events are different ({type1} vs {type2}).";
return(false);
}
if (midiEvent1 is SystemRealTimeEvent)
{
return(true);
}
var channelEvent1 = midiEvent1 as ChannelEvent;
if (channelEvent1 != null)
{
var channelEvent2 = (ChannelEvent)midiEvent2;
var channel1 = channelEvent1.Channel;
var channel2 = channelEvent2.Channel;
if (channel1 != channel2)
{
message = $"Channels of events are different ({channel1} vs {channel2}).";
return(false);
}
if (channelEvent1._dataByte1 != channelEvent2._dataByte1)
{
message = $"First data bytes of events are different ({channelEvent1._dataByte1} vs {channelEvent2._dataByte1}).";
return(false);
}
if (channelEvent1._dataByte2 != channelEvent2._dataByte2)
{
message = $"Second data bytes of events are different ({channelEvent1._dataByte2} vs {channelEvent2._dataByte2}).";
return(false);
}
return(true);
}
var sysExEvent1 = midiEvent1 as SysExEvent;
if (sysExEvent1 != null)
{
var sysExEvent2 = (SysExEvent)midiEvent2;
var completed1 = sysExEvent1.Completed;
var completed2 = sysExEvent2.Completed;
if (completed1 != completed2)
{
message = $"'Completed' state of system exclusive events are different ({completed1} vs {completed2}).";
return(false);
}
if (!ArrayUtilities.Equals(sysExEvent1.Data, sysExEvent2.Data))
{
message = "System exclusive events data are different.";
return(false);
}
return(true);
}
var sequencerSpecificEvent1 = midiEvent1 as SequencerSpecificEvent;
if (sequencerSpecificEvent1 != null)
{
var sequencerSpecificEvent2 = (SequencerSpecificEvent)midiEvent2;
if (!ArrayUtilities.Equals(sequencerSpecificEvent1.Data, sequencerSpecificEvent2.Data))
{
message = "Sequencer specific events data are different.";
return(false);
}
return(true);
}
var unknownMetaEvent1 = midiEvent1 as UnknownMetaEvent;
if (unknownMetaEvent1 != null)
{
var unknownMetaEvent2 = (UnknownMetaEvent)midiEvent2;
var statusByte1 = unknownMetaEvent1.StatusByte;
var statusByte2 = unknownMetaEvent2.StatusByte;
if (statusByte1 != statusByte2)
{
message = $"Unknown meta events status bytes are different ({statusByte1} vs {statusByte2}).";
return(false);
}
if (!ArrayUtilities.Equals(unknownMetaEvent1.Data, unknownMetaEvent2.Data))
{
message = "Unknown meta events data are different.";
return(false);
}
return(true);
}
var baseTextEvent1 = midiEvent1 as BaseTextEvent;
if (baseTextEvent1 != null)
{
var baseTextEvent2 = (BaseTextEvent)midiEvent2;
var text1 = baseTextEvent1.Text;
var text2 = baseTextEvent2.Text;
if (!string.Equals(text1, text2, settings.TextComparison))
{
message = $"Meta events texts are different ({text1} vs {text2}).";
return(false);
}
return(true);
}
Func <MidiEvent, MidiEvent, bool> comparer;
if (Comparers.TryGetValue(midiEvent1.EventType, out comparer))
{
return(comparer(midiEvent1, midiEvent2));
}
var result = midiEvent1.Equals(midiEvent2);
if (!result)
{
message = $"Events {midiEvent1} and {midiEvent2} are not equal by result of Equals call on first event.";
}
return(result);
}
