/// <inheritdoc />
public override bool Activate(DocumentSelection cursor, CaretMovementMode movementMode, SelectionMode mode)
{
// first we try to move the cursor directly
var caret = cursor.Start;
var next = caret.MoveForward();
// try a simply to move the cursor forwards
if (next.IsValid)
{
cursor.MoveTo(next, mode);
return(true);
}
// try get the block backward to get a cursor that looks at the beginning of that block
var block = caret.Block?.Parent.GetBlockTo(BlockDirection.Forward, caret.Block) as ContentBlock;
if (block != null)
{
cursor.MoveTo(block.GetCaretAtStart(), mode);
return(true);
}
// we couldn't do it
return(false);
}
/// <inheritdoc />
public override bool Activate(DocumentSelection cursor, CaretMovementMode movementMode, SelectionMode mode)
{
var textCaret = cursor.Start.As <TextCaret>();
double desiredPosition = UpdateMovementMode(movementMode, textCaret);
var contentView = textCaret.Block.GetViewOrNull <ITextBlockView>();
if (contentView == null)
{
return(false);
}
var currentLine = contentView.GetLineFor(textCaret);
var nextLine = currentLine.Next;
if (nextLine != null)
{
// TODO what if it's invalid (maybe only if the line couldn't be found?)
var caret = nextLine.FindClosestTo(desiredPosition);
if (!caret.IsValid)
{
return(false);
}
cursor.MoveTo(caret, mode);
return(true);
}
var currentBlock = textCaret.Block;
var nextBlock = currentBlock.Parent.GetBlockTo(BlockDirection.Bottom, currentBlock);
if (nextBlock != null)
{
if (nextBlock.GetViewOrNull <IBlockView>() is IBlockView nextBlockView)
{
var newCursor = nextBlockView.GetCaretFromTop(movementMode);
cursor.MoveTo(newCursor, mode);
return(true);
}
else
{
return(false);
}
}
// TODO work the way up the document
// we couldn't do it
return(false);
}
/// <inheritdoc/>
public override bool Activate(DocumentSelection cursor, CaretMovementMode movementMode, SelectionMode mode)
{
var textCaret = cursor.Start.As <TextCaret>();
movementMode.SetModeToHome();
var contentView = textCaret.Block.GetViewOrNull <ITextBlockView>();
if (contentView == null)
{
return(false);
}
textCaret = contentView.GetLineFor(textCaret).FindClosestTo(0);
cursor.MoveTo(textCaret, mode);
return(true);
}
