public static void LoadInto(XElement fullXml, DocumentEditorContext editorContext)
{
try
{
var contentXml = fullXml;
var node = XmlNodeSerializer.Deserialize(contentXml);
var serializationContext = new SerializationContext(
new DescriptorsLookup(ParagraphBlock.Descriptor,
(BlockDescriptor)HeadingBlock.Descriptor
)
);
var mode = new CaretMovementMode();
mode.SetModeToEnd();
editorContext.Document.Root.Deserialize(serializationContext, node.Children.First());
editorContext.Selection.Replace(editorContext.Document.Root.GetView <IBlockView>().GetCaretFromBottom(mode));
}
catch (Exception)
{
// ignored
}
}
/// <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);
}
/// <summary> Default constructor. </summary>
public DocumentEditorContext(DocumentOwner owner)
{
Document = owner;
var cursor = ((ContentBlock)Document.Root.FirstBlock).GetCaretAtStart();
Selection = new DocumentSelection(Document, cursor);
CaretMovementMode = new CaretMovementMode();
UndoStack = new ActionStack(this, new StandardMergePolicy());
}
/// <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);
}
private double UpdateMovementMode(CaretMovementMode movementMode, TextCaret caret)
{
switch (movementMode.CurrentMode)
{
case CaretMovementMode.Mode.None:
var position = TextCaretMeasurerHelper.Measure(caret).Left;
movementMode.SetModeToPosition(position);
return(position);
case CaretMovementMode.Mode.Position:
return(movementMode.Position);
case CaretMovementMode.Mode.Home:
return(0);
case CaretMovementMode.Mode.End:
return(double.MaxValue);
default:
throw new ArgumentOutOfRangeException();
}
}
/// <inheritdoc /> public BlockCaret GetCaretFromTop(CaretMovementMode movementMode) => CollectionViewHelper.GetCaretFromTop(Children, movementMode);
/// <summary> Activates the given command, acting on the given caret. </summary> /// <param name="cursor"> The caret on which to act. </param> /// <param name="movementMode"> The current caret mode. </param> /// <param name="mode"></param> /// <param name="shouldExtend"> How the caret should be moved. </returns> public abstract bool Activate(DocumentSelection cursor, CaretMovementMode movementMode, SelectionMode mode);
public static BlockCaret GetCaretFromTop(UIElementCollection collection, CaretMovementMode movementMode) => ((IBlockView)collection.First()).GetCaretFromTop(movementMode);
/// <inheritdoc /> public BlockCaret GetCaretFromBottom(CaretMovementMode movementMode) => CollectionViewHelper.GetCaretFromBottom(_childContents.Children, movementMode);