public static Func<ViMotionContext, ViMotionResult> DoMotion (Action<ViMotionContext> motion)
{
return (ViMotionContext context) => {
int count = context.Count ?? 1;
ViMotionResult result = null;
for (int i = 0; i < count; i++)
{
if (context.StartingLine.HasValue) context.Data.Caret.Line = context.StartingLine.Value;
if (context.StartingColumn.HasValue) context.Data.Caret.Column = context.StartingColumn.Value;
int line = context.Data.Caret.Line;
int column = context.Data.Caret.Column;
motion(context);
result = new ViMotionResult(context.Data.Caret.Line, context.Data.Caret.Column);
context.StartingLine = result.Line;
context.StartingColumn = result.Column;
context.Data.Caret.Line = line;
context.Data.Caret.Column = column;
}
context.StartingLine = null;
context.StartingColumn = null;
return result;
};
}
public static ViMotionResult Left (ViMotionContext context)
{
ViMotionResult result = new ViMotionResult(context);
result.Column -= (context.Count ?? 1);
if (result.Column < 1)
result.Column = 1;
return result;
}
public static ViMotionResult Right (ViMotionContext context)
{
ViMotionResult result = new ViMotionResult(context);
DocumentLine currentLine = context.Data.Document.GetLine (context.Data.Caret.Line);
if (currentLine.EndOffsetIncludingDelimiter-1 > context.Data.Caret.Offset) {
result.Column += (context.Count ?? 1);
if (result.Column > currentLine.Length)
result.Column = currentLine.Length;
result = ViEditMode.RetreatFromLineEnd (context, result);
}
return result;
}
public static ViMotionResult WordStart (ViMotionContext context)
{
var result = new ViMotionResult(context);
TextDocument doc = context.Data.Document;
for (int i=0; i < context.Count; i++)
{
int offset = doc.LocationToOffset(result.Line, result.Column);
offset = context.Data.FindCurrentWordStart (offset);
DocumentLocation loc = doc.OffsetToLocation(offset);
result.Line = loc.Line;
result.Column = loc.Column;
}
return result;
}
public static ViMotionResult Up (ViMotionContext context)
{
var result = new ViMotionResult(context);
var data = context.Data;
PersistColumn = System.Math.Max(PersistColumn, result.Column);
result.Line -= (context.Count ?? 1);
if (result.Line < 1)
result.Line = 1;
ViEditMode.RetreatFromLineEnd (context, result);
DocumentLine line = data.Document.GetLine (result.Line);
if ((PersistColumn != result.Column) && (PersistColumn <= line.Length))
{
result.Column = PersistColumn;
PersistColumn = 0;
}
return result;
}