private IEnumerable <CreoleRichTextElementNodeData> _GetRootNodesFrom(TokenRange <CreoleTokenCode> tokens, IEnumerable <CreoleRichTextElementData> elementsData)
{
var rootNodes = new List <CreoleRichTextElementNodeData>();
var visitedElementTypes = new List <CreoleRichTextElementType>(10);
foreach (var elementData in elementsData)
{
var node = new CreoleRichTextElementNodeData(elementData);
IList <CreoleRichTextElementNodeData> siblingNodes = rootNodes;
while (siblingNodes.Count > 0 && _Contains(siblingNodes[siblingNodes.Count - 1], node))
{
var parentNode = siblingNodes[siblingNodes.Count - 1];
siblingNodes = parentNode.ChildNodes;
visitedElementTypes.Add(parentNode.ElementType);
}
if (node.ElementType == CreoleRichTextElementType.Hyperlink)
{
var contentRange = tokens.SubRange(node.ContentStartIndex, (node.ContentEndIndex - node.ContentStartIndex));
foreach (var hyperlinkContentElementNodeData in _GetHyperlinkContentElementNodesData(contentRange, visitedElementTypes))
{
node.ChildNodes.Add(_AddIndexOffset(node.ContentStartIndex, hyperlinkContentElementNodeData));
}
}
siblingNodes.Add(node);
visitedElementTypes.Clear();
}
return(rootNodes);
}
private string _GetContentFrom(TokenRange <CreoleTokenCode> tokens, CreoleRichTextElementNodeData richTextElementData)
{
var contentStartIndex = richTextElementData.ContentStartIndex;
var contentEndIdnex = richTextElementData.ContentEndIndex;
var contentRange = tokens.SubRange(contentStartIndex, (contentEndIdnex - contentStartIndex));
return(TokenRangeHelper.GetPlainText(contentRange));
}
private string _GetUrlFrom(TokenRange <CreoleTokenCode> tokens, CreoleRichTextElementNodeData richTextElementData)
{
var urlStartIndex = richTextElementData.UrlStartIndex;
var urlEndIdnex = richTextElementData.UrlEndIndex;
var urlRange = tokens.SubRange(urlStartIndex, (urlEndIdnex - urlStartIndex));
return(TokenRangeHelper.GetPlainText(urlRange));
}
private CreoleRichTextElementNodeData _AddIndexOffset(int offset, CreoleRichTextElementNodeData nodeData)
=> new CreoleRichTextElementNodeData(
new CreoleRichTextElementData(
elementType: nodeData.ElementType,
startIndex: (offset + nodeData.StartIndex),
endIndex: (offset + nodeData.EndIndex),
urlStartIndex: (offset + nodeData.UrlStartIndex),
urlEndIndex: (offset + nodeData.UrlEndIndex),
contentStartIndex: (offset + nodeData.ContentStartIndex),
contentEndIndex: (offset + nodeData.ContentEndIndex)
),
nodeData.ChildNodes
);
private static bool _Contains(CreoleRichTextElementNodeData parent, CreoleRichTextElementNodeData child) => (parent.ContentStartIndex <= child.StartIndex && child.EndIndex <= parent.ContentEndIndex);
private Element _GetCreoleElementFrom(TokenRange <CreoleTokenCode> tokens, CreoleRichTextElementNodeData nodeData)
{
Element result = null;
switch (nodeData.ElementType)
{
case CreoleRichTextElementType.Code:
result = new CodeElement(
_GetContentFrom(tokens, nodeData)
);
break;
case CreoleRichTextElementType.Hyperlink:
result = new HyperlinkElement(
_GetUrlFrom(tokens, nodeData),
_GetCreoleElements(tokens, nodeData.ContentStartIndex, nodeData.ContentEndIndex, nodeData.ChildNodes)
);
break;
case CreoleRichTextElementType.Image:
if (nodeData.UrlEndIndex < nodeData.ContentStartIndex)
{
result = new ImageElement(
_GetUrlFrom(tokens, nodeData),
_GetContentFrom(tokens, nodeData)
);
}
else
{
result = new ImageElement(
_GetUrlFrom(tokens, nodeData)
);
}
break;
case CreoleRichTextElementType.Plugin:
result = new PluginElement(
_GetContentFrom(tokens, nodeData)
);
break;
case CreoleRichTextElementType.LineBreak:
result = _creoleLineBreakElement;
break;
case CreoleRichTextElementType.InlineHyperlink:
var url = _GetUrlFrom(tokens, nodeData);
result = new HyperlinkElement(url, new[] { new TextElement(url) });
break;
case CreoleRichTextElementType.EscapedInlineHyperlink:
result = new TextElement(
_GetUrlFrom(tokens, nodeData)
);
break;
case CreoleRichTextElementType.Emphasis:
result = new EmphasisElement(
_GetCreoleElements(tokens, nodeData.ContentStartIndex, nodeData.ContentEndIndex, nodeData.ChildNodes)
);
break;
case CreoleRichTextElementType.Strong:
result = new StrongElement(
_GetCreoleElements(tokens, nodeData.ContentStartIndex, nodeData.ContentEndIndex, nodeData.ChildNodes)
);
break;
}
return(result);
}
