public ChangeInLinesInfo GetChangeInLines(IReadOnlyList <VisualTextLine> lines, TextRange range)
{
var orderedRanges = (new[] { range.StartPosition, range.EndPosition }).OrderBy(elem => elem.Line).ThenBy(elem => elem.Column).ToArray();
var pair = new TextRange {
StartPosition = orderedRanges[0],
EndPosition = orderedRanges[1]
};
var rangeEnd = -1;
if (pair.StartPosition.Line == pair.EndPosition.Line)
{
rangeEnd = pair.EndPosition.Line;
}
else
{
rangeEnd = pair.EndPosition.Line + 1;
}
var firstPart = Cut(lines[pair.StartPosition.Line], 0, pair.StartPosition.Column);
var secondPart = Cut(lines[pair.EndPosition.Line], pair.EndPosition.Column);
return(new ChangeInLinesInfo {
LinesToChange = new Dictionary <TextPosition, VisualTextLine> {
[new TextPosition(pair.StartPosition.Column, pair.StartPosition.Line)] =
VisualTextLine.MergeLines(new[] { firstPart, secondPart }, firstPart.Index)
},
LinesToRemove = Enumerable.Range(pair.StartPosition.Line, rangeEnd).ToList()
});
}
private ChangeInLinesInfo DeleteFromActiveLine(IReadOnlyList <VisualTextLine> lines, TextPosition startingTextPosition)
{
var currentLine = lines[startingTextPosition.Line];
var firstPart = Cut(currentLine, 0, startingTextPosition.Column);
var secondPart = Cut(currentLine, startingTextPosition.Column + 1);
var lineAfterRemove = VisualTextLine.MergeLines(new[] { firstPart, secondPart }, currentLine.Index);
return(new ChangeInLinesInfo {
LinesToChange = new Dictionary <TextPosition, VisualTextLine> {
[new TextPosition(startingTextPosition.Column, startingTextPosition.Line)] = lineAfterRemove
},
LinesToRemove = new int[0]
});
}
private ChangeInLinesInfo RemoveFromActiveLine(IReadOnlyList <VisualTextLine> lines, TextPosition startingTextPosition)
{
var currentLine = lines[startingTextPosition.Line];
var attachRest = startingTextPosition.Column < lines[startingTextPosition.Line].Length;
var firstPart = Cut(currentLine, 0, startingTextPosition.Column - 1);
var secondPart = attachRest ? Cut(currentLine, startingTextPosition.Column) : null;
var lineAfterRemove = secondPart != null?VisualTextLine.MergeLines(new[] { firstPart, secondPart }, currentLine.Index) : firstPart;
return(new ChangeInLinesInfo {
LinesToChange = new Dictionary <TextPosition, VisualTextLine> {
[new TextPosition(startingTextPosition.Column - 1, startingTextPosition.Line)] = lineAfterRemove
},
LinesToRemove = new int[0]
});
}
private ChangeInLinesInfo RemoveThisLine(IReadOnlyList <VisualTextLine> lines, TextPosition startingTextPosition)
{
var firstLine = lines[startingTextPosition.Line - 1];
var linesAffected = new List <KeyValuePair <TextPosition, VisualTextLine> > {
new KeyValuePair <TextPosition, VisualTextLine>(
new TextPosition(lines[startingTextPosition.Line - 1].Length, startingTextPosition.Line - 1),
VisualTextLine.MergeLines(new[] { firstLine, lines[startingTextPosition.Line] }, firstLine.Index))
};
for (var i = startingTextPosition.Line + 1; i < lines.Count; i++)
{
linesAffected.Add(new KeyValuePair <TextPosition, VisualTextLine>(new TextPosition(0, i - 1), lines[i].CloneWithIndexChange(i - 1)));
}
return(new ChangeInLinesInfo {
LinesToChange = linesAffected,
LinesToRemove = new[] { lines.Count - 1 }
});
}
private ChangeInLinesInfo DeleteNextLine(IReadOnlyList <VisualTextLine> lines, TextPosition startingTextPosition)
{
var firstLine = lines[startingTextPosition.Line];
var secondLine = startingTextPosition.Line + 1 < lines.Count ? lines[startingTextPosition.Line + 1] : null;
var linesToMerge = secondLine == null ? new[] { firstLine } : new[] { firstLine, secondLine };
var linesAffected = new List <KeyValuePair <TextPosition, VisualTextLine> > {
new KeyValuePair <TextPosition, VisualTextLine>(
new TextPosition(startingTextPosition.Column, startingTextPosition.Line),
VisualTextLine.MergeLines(linesToMerge, firstLine.Index))
};
for (var i = startingTextPosition.Line + 2; i < lines.Count; i++)
{
linesAffected.Add(new KeyValuePair <TextPosition, VisualTextLine>(new TextPosition(0, i - 1), lines[i].CloneWithIndexChange(i - 1)));
}
return(new ChangeInLinesInfo {
LinesToChange = linesAffected,
LinesToRemove = new[] { lines.Count - 1 }
});
}