/// <summary>
/// Inserts a text between two nodes
/// </summary>
internal static void InsertTextBetweenTwoNodes(XmlCursorPos cursorPos, System.Xml.XmlNode nodeBefore, System.Xml.XmlNode nodeAfter, string text, XmlRules xmlRules)
{
if (ToolboxXml.IsTextOrCommentNode(nodeBefore)) // if the node is already text before, then simply append to it
{
nodeBefore.InnerText += text;
cursorPos.SetPos(nodeBefore, XmlCursorPositions.CursorInsideTextNode, nodeBefore.InnerText.Length);
}
else // the node before is no text
{
if (ToolboxXml.IsTextOrCommentNode(nodeAfter)) // if the node behind it is already text then just paste it into
{
nodeAfter.InnerText = $"{text}{nodeAfter.InnerText}";
cursorPos.SetPos(nodeAfter, XmlCursorPositions.CursorInsideTextNode, text.Length);
}
else // the node behind is also no text
{
// Insert between two non-text nodes
if (xmlRules.IsThisTagAllowedAtThisPos("#PCDATA", cursorPos))
{
System.Xml.XmlText newTextNode = cursorPos.ActualNode.OwnerDocument.CreateTextNode(text);
InsertXmlNode(cursorPos, newTextNode, xmlRules, false);
}
else
{
#warning Insert another correct message or sound
Debug.Assert(false, "Error - Beep!");
}
}
}
}
/// <summary>
/// Inserts the specified text at the current cursor position, if possible
/// </summary>
internal static InsertTextResult InsertText(XmlCursorPos cursorPos, string rawText, XmlRules xmlRules)
{
// Revise the entered text in preprocessing if necessary.
// In an AIML 1.1 DTD this can mean, for example, that the text for insertion into the PATTERN tag is changed to upper case
string text = xmlRules.InsertTextTextPreProcessing(rawText, cursorPos, out System.Xml.XmlNode replacementNode);
if (replacementNode != null)
{
// If the entered text has become a node instead, e.g. with AIML,
// if you press * in a template and then want to insert a <star> instead
return(new InsertTextResult {
ReplaceNode = replacementNode
});
}
switch (cursorPos.PosOnNode)
{
case XmlCursorPositions.CursorOnNodeStartTag:
case XmlCursorPositions.CursorOnNodeEndTag:
// First check whether this node may be replaced by a text node
if (xmlRules.IsThisTagAllowedAtThisPos("#PCDATA", cursorPos))
{
// The selected node by a newly created text node
System.Xml.XmlText neuerTextNode = cursorPos.ActualNode.OwnerDocument.CreateTextNode(text);
cursorPos.ActualNode.ParentNode.ReplaceChild(cursorPos.ActualNode, neuerTextNode);
cursorPos.SetPos(neuerTextNode, XmlCursorPositions.CursorBehindTheNode);
}
throw new ApplicationException(String.Format("InsertText: unknown CursorPos {0}", cursorPos.PosOnNode));
case XmlCursorPositions.CursorBehindTheNode:
InsertTextBetweenTwoNodes(cursorPos, cursorPos.ActualNode, cursorPos.ActualNode.NextSibling, text, xmlRules);
break;
case XmlCursorPositions.CursorInFrontOfNode:
InsertTextBetweenTwoNodes(cursorPos, cursorPos.ActualNode.PreviousSibling, cursorPos.ActualNode, text, xmlRules);
break;
case XmlCursorPositions.CursorInsideTheEmptyNode:
// First check if text is allowed inside the empty node
if (xmlRules.IsThisTagAllowedAtThisPos("#PCDATA", cursorPos))
{
// Then create a text node within the empty node with the desired text content
System.Xml.XmlText newTextNode = cursorPos.ActualNode.OwnerDocument.CreateTextNode(text);
cursorPos.ActualNode.AppendChild(newTextNode);
cursorPos.SetPos(newTextNode, XmlCursorPositions.CursorBehindTheNode);
}
else
{
// Error BEEEEP!
}
break;
case XmlCursorPositions.CursorInsideTextNode:
string textBeforeNode = cursorPos.ActualNode.InnerText.Substring(0, cursorPos.PosInTextNode);
string textAfterCursor = cursorPos.ActualNode.InnerText.Substring(cursorPos.PosInTextNode, cursorPos.ActualNode.InnerText.Length - cursorPos.PosInTextNode);
// Insert the character of the pressed keys after the cursor
cursorPos.ActualNode.InnerText = $"{textBeforeNode}{text}{textAfterCursor}";
cursorPos.SetPos(cursorPos.ActualNode, cursorPos.PosOnNode, cursorPos.PosInTextNode + text.Length);
break;
default:
throw new ApplicationException(String.Format("InsertText: unknown CursorPos {0}", cursorPos.PosOnNode));
}
return(new InsertTextResult {
ReplaceNode = replacementNode
});
}