/// <summary>
/// - Processes a character event into a Action that occurs while in the OscParam state.
/// Events in this state will:
/// 1. Trigger the OSC action associated with the param on an OscTerminator
/// 2. If we see a ESC, enter the OscTermination state. We'll wait for one
/// more character before we dispatch the string.
/// 3. Ignore OscInvalid characters.
/// 4. Collect everything else into the OscString
/// </summary>
/// <param name="ch"></param>
private void EventOSCString(byte ch)
{
if (ASCIIChars.IsOSCTerminator(ch))
{
// 出现了OSC结束符，那么进入Ground状态
this.ActionOSCDispatch(ch);
this.EnterGround();
}
else if (ASCIIChars.IsEscape(ch))
{
// OSC状态下出现了ESC字符，那么有两种情况会出现：
// 1. ESC后面有ST字符，说明是OSC状态结束了
// 2. ESC后面没有ST字符，说明是ESC状态
// 所以这里定义一个OSCTermination状态来处理这两种状态
this.EnterOSCTermination();
}
else if (ASCIIChars.IsOSCIndicator(ch))
{
// OSC非法字符，忽略
this.ActionIgnore(ch);
}
else
{
// 剩下的就是OSC的有效字符，收集
this.oscString.Append((char)ch);
}
}
/// <summary>
/// 解析终端字节流
/// </summary>
/// <param name="bytes">要解析的字节流</param>
public void ProcessCharacters(byte[] bytes)
{
int length = bytes.Length;
for (int i = 0; i < length; i++)
{
byte ch = bytes[i];
// 在OSCString的状态下，ESC转义字符可以用作OSC状态的结束符，所以在这里不进入ESC状态
if (ASCIIChars.IsEscape(ch) && this.state != VTStates.OSCString)
{
this.EnterEscape();
}
else
{
switch (this.state)
{
case VTStates.Ground:
{
this.EventGround(ch);
break;
}
case VTStates.Escape:
{
this.EventEscape(ch);
break;
}
case VTStates.EscapeIntermediate:
{
this.EventEscapeIntermediate(ch);
break;
}
case VTStates.OSCParam:
{
this.EventOSCParam(ch);
break;
}
case VTStates.OSCString:
{
this.EventOSCString(ch);
break;
}
case VTStates.OSCTermination:
{
this.EventOSCTermination(ch);
break;
}
case VTStates.CSIEntry:
{
this.EventCSIEntry(ch);
break;
}
case VTStates.CSIIntermediate:
{
this.EventCSIIntermediate(ch);
break;
}
case VTStates.CSIIgnore:
{
this.EventCSIIgnore(ch);
break;
}
case VTStates.CSIParam:
{
this.EventCSIParam(ch);
break;
}
case VTStates.DCSEntry:
{
this.EventDCSEntry(ch);
break;
}
case VTStates.DCSIgnore:
{
this.EventDCSIgnore(ch);
break;
}
case VTStates.DCSIntermediate:
{
this.EventDCSIntermediate(ch);
break;
}
case VTStates.DCSParam:
{
this.EventDCSParam(ch);
break;
}
case VTStates.DCSPassthrough:
{
this.EventDCSPassThrough(ch);
break;
}
case VTStates.Vt52Param:
{
this.EventVt52Param(ch);
break;
}
}
}
}
}
