/// <summary>
/// Inserts the specified text at the current cursor position, if possible
/// </summary>
private async Task InsertText(XmlCursor cursor, string text, XmlRules xmlRules)
{
XmlCursorPos insertPos;
// If something is selected, then delete it first, because it will be replaced by the new text
XmlCursor deleteArea = cursor.Clone();
await deleteArea.OptimizeSelection();
var deleteResult = await XmlCursorSelectionHelper.DeleteSelection(deleteArea);
if (deleteResult.Success)
{
insertPos = deleteResult.NewCursorPosAfterDelete;
}
else
{
insertPos = cursor.StartPos.Clone();
}
// insert the specified text at the cursor position
var replacementNode = InsertAtCursorPosHelper.InsertText(insertPos, text, xmlRules).ReplaceNode;
if (replacementNode != null)
{
// Text could not be inserted because a node input was converted from text input.
// Example: In the AIML template, * is pressed, and a <star> is inserted there instead
InsertAtCursorPosHelper.InsertXmlNode(insertPos, replacementNode, xmlRules, false);
}
// then the cursor is only one line behind the inserted text
await cursor.SetPositions(insertPos.ActualNode, insertPos.PosOnNode, insertPos.PosInTextNode, throwChangedEventWhenValuesChanged : false);
}
/// <summary>
/// deletes the actual cursor selection
/// </summary>
/// <returns>true, if deleted successfully</returns>
public virtual async Task <bool> ActionDelete(SetUndoSnapshotOptions setUnDoSnapshot)
{
if (!this.ActionsAllowed)
{
return(false);
}
if (this.editorState.IsRootNodeSelected)
{
return(false); // The root node is to be deleted: Not allowed
}
if (setUnDoSnapshot == SetUndoSnapshotOptions.Yes)
{
this.editorState.UndoHandler.SetSnapshot("delete", this.editorState.CursorRaw);
}
var optimized = this.editorState.CursorRaw;
await optimized.OptimizeSelection();
var deleteResult = await XmlCursorSelectionHelper.DeleteSelection(optimized);
if (deleteResult.Success)
{
await this.editorState.CursorRaw.SetPositions(deleteResult.NewCursorPosAfterDelete.ActualNode, deleteResult.NewCursorPosAfterDelete.PosOnNode, deleteResult.NewCursorPosAfterDelete.PosInTextNode, throwChangedEventWhenValuesChanged : false);
await this.editorState.FireContentChangedEvent(needToSetFocusOnEditorWhenLost : false, forceFullRepaint : false);
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// FInserts the specified node at the current cursor position, if possible
/// </summary>
private async Task XMLNodeEinfuegen(XmlCursor cursor, XmlNode node, XmlRules xmlRules, bool setNewCursorPosBehindNewInsertedNode)
{
// If something is selected, then delete it first, because it will be replaced by the new text
XmlCursor deleteArea = cursor.Clone();
await deleteArea.OptimizeSelection();
var deleteResult = await XmlCursorSelectionHelper.DeleteSelection(deleteArea);
if (deleteResult.Success)
{
await cursor.SetPositions(deleteResult.NewCursorPosAfterDelete.ActualNode, deleteResult.NewCursorPosAfterDelete.PosOnNode, deleteResult.NewCursorPosAfterDelete.PosInTextNode, throwChangedEventWhenValuesChanged : false);
}
// insert the specified node at the cursor position
if (InsertAtCursorPosHelper.InsertXmlNode(cursor.StartPos, node, xmlRules, setNewCursorPosBehindNewInsertedNode))
{
// then the cursor is only one line behind the inserted
cursor.EndPos.SetPos(cursor.StartPos.ActualNode, cursor.StartPos.PosOnNode, cursor.StartPos.PosInTextNode);
}
}
/// <summary>
/// Delete the node or the character behind the cursor
/// </summary>
public async Task <bool> ActionDeleteNodeOrSignBehindCursorPos(XmlCursorPos position, SetUndoSnapshotOptions setUnDoSnapshot)
{
if (!this.ActionsAllowed)
{
return(false);
}
if (setUnDoSnapshot == SetUndoSnapshotOptions.Yes)
{
this.editorState.UndoHandler.SetSnapshot("delete", this.editorState.CursorRaw);
}
var deleteArea = new XmlCursor();
deleteArea.StartPos.SetPos(position.ActualNode, position.PosOnNode, position.PosInTextNode);
var endPos = deleteArea.StartPos.Clone();
await CursorPosMoveHelper.MoveRight(endPos, this.editorState.RootNode, this.xmlRules);
deleteArea.EndPos.SetPos(endPos.ActualNode, endPos.PosOnNode, endPos.PosInTextNode);
await deleteArea.OptimizeSelection();
if (deleteArea.StartPos.ActualNode == this.editorState.RootNode)
{
return(false); // You must not delete the rootnot
}
var deleteResult = await XmlCursorSelectionHelper.DeleteSelection(deleteArea);
if (deleteResult.Success)
{
// After successful deletion the new CursorPos is retrieved here
await this.editorState.CursorRaw.SetPositions(deleteResult.NewCursorPosAfterDelete.ActualNode, deleteResult.NewCursorPosAfterDelete.PosOnNode, deleteResult.NewCursorPosAfterDelete.PosInTextNode, throwChangedEventWhenValuesChanged : false);
await this.editorState.FireContentChangedEvent(needToSetFocusOnEditorWhenLost : false, forceFullRepaint : false);
return(true);
}
return(false);
}