/// <summary>
/// Renders a link element
/// </summary>
/// <param name="inlineCollection"> The list to add to. </param>
/// <param name="element"> The parsed inline element to render. </param>
/// <param name="parent"> The container element. </param>
/// <param name="context"> Persistent state. </param>
private void RenderMarkdownLink(InlineCollection inlineCollection, MarkdownLinkInline element, TextElement parent, RenderContext context)
{
// Avoid crash when link text is empty.
if (element.Inlines.Count == 0)
{
return;
}
// Attempt to resolve references.
element.ResolveReference(_document);
if (element.Url == null)
{
// The element couldn't be resolved, just render it as text.
RenderInlineChildren(inlineCollection, element.Inlines, parent, context);
return;
}
// HACK: Superscript is not allowed within a hyperlink. But if we switch it around, so
// that the superscript is outside the hyperlink, then it will render correctly.
// This assumes that the entire hyperlink is to be rendered as superscript.
if (AllTextIsSuperscript(element) == false)
{
// Regular ol' hyperlink.
var link = new Hyperlink();
// Register the link
_linkRegister.RegisterNewHyperLink(link, element.Url);
// Remove superscripts.
RemoveSuperscriptRuns(element, insertCaret: true);
// Render the children into the link inline.
var childContext = context.Clone();
childContext.WithinHyperlink = true;
RenderInlineChildren(link.Inlines, element.Inlines, link, childContext);
context.TrimLeadingWhitespace = childContext.TrimLeadingWhitespace;
// Add it to the current inlines
inlineCollection.Add(link);
}
else
{
// THE HACK IS ON!
// Create a fake superscript element.
var fakeSuperscript = new SuperscriptTextInline
{
Inlines = new List <MarkdownInline>
{
element
}
};
// Remove superscripts.
RemoveSuperscriptRuns(element, insertCaret: false);
// Now render it.
RenderSuperscriptRun(inlineCollection, fakeSuperscript, parent, context);
}
}
/// <summary>
/// Renders a superscript element.
/// </summary>
/// <param name="inlineCollection"> The list to add to. </param>
/// <param name="element"> The parsed inline element to render. </param>
/// <param name="parent"> The container element. </param>
/// <param name="context"> Persistent state. </param>
private void RenderSuperscriptRun(InlineCollection inlineCollection, SuperscriptTextInline element, TextElement parent, RenderContext context)
{
// Le <sigh>, InlineUIContainers are not allowed within hyperlinks.
if (context.WithinHyperlink)
{
RenderInlineChildren(inlineCollection, element.Inlines, parent, context);
return;
}
var paragraph = new Paragraph();
paragraph.FontSize = parent.FontSize * 0.8;
paragraph.FontFamily = parent.FontFamily;
paragraph.FontStyle = parent.FontStyle;
paragraph.FontWeight = parent.FontWeight;
RenderInlineChildren(paragraph.Inlines, element.Inlines, paragraph, context);
var richTextBlock = CreateOrReuseRichTextBlock(null, context);
richTextBlock.Blocks.Add(paragraph);
var border = new Border();
border.Padding = new Thickness(0, 0, 0, paragraph.FontSize * 0.2);
border.Child = richTextBlock;
var inlineUIContainer = new InlineUIContainer();
inlineUIContainer.Child = border;
// Add it to the current inlines
inlineCollection.Add(inlineUIContainer);
}
/// <summary>
/// Renders a link element
/// </summary>
/// <param name="element"> The parsed inline element to render. </param>
/// <param name="context"> Persistent state. </param>
protected override void RenderMarkdownLink(MarkdownLinkInline element, IRenderContext context)
{
if (!(context is InlineRenderContext localContext))
{
throw new RenderContextIncorrectException();
}
// HACK: Superscript is not allowed within a hyperlink. But if we switch it around, so
// that the superscript is outside the hyperlink, then it will render correctly.
// This assumes that the entire hyperlink is to be rendered as superscript.
if (AllTextIsSuperscript(element) == false)
{
var link = new Hyperlink();
LinkRegister.RegisterNewHyperLink(link, element.Url);
RemoveSuperscriptRuns(element, insertCaret: true);
var childContext = new InlineRenderContext(link.Inlines, context)
{
Parent = link,
WithinHyperlink = true
};
if (localContext.OverrideForeground)
{
link.Foreground = localContext.Foreground;
}
else if (LinkForeground != null)
{
link.Foreground = LinkForeground;
}
RenderInlineChildren(element.Inlines, childContext);
context.TrimLeadingWhitespace = childContext.TrimLeadingWhitespace;
ToolTipService.SetToolTip(link, element.Tooltip ?? element.Url);
localContext.InlineCollection.Add(link);
}
else
{
// THE HACK IS ON!
// Create a fake superscript element.
var fakeSuperscript = new SuperscriptTextInline
{
Inlines = new List <MarkdownInline>
{
element
}
};
RemoveSuperscriptRuns(element, insertCaret: false);
RenderSuperscriptRun(fakeSuperscript, context);
}
}
static Common()
{
BoldTextInline.AddTripChars(_triggerList);
ItalicTextInline.AddTripChars(_triggerList);
MarkdownLinkInline.AddTripChars(_triggerList);
HyperlinkInline.AddTripChars(_triggerList);
StrikethroughTextInline.AddTripChars(_triggerList);
SuperscriptTextInline.AddTripChars(_triggerList);
CodeInline.AddTripChars(_triggerList);
// Create an array of characters to search against using IndexOfAny.
_tripCharacters = _triggerList.Select(trigger => trigger.FirstChar).Distinct().ToArray();
}
/// <summary>
/// Renders a superscript element.
/// </summary>
/// <param name="element"> The parsed inline element to render. </param>
/// <param name="context"> Persistent state. </param>
protected override void RenderSuperscriptRun(SuperscriptTextInline element, IRenderContext context)
{
var localContext = context as InlineRenderContext;
var parent = localContext?.Parent as TextElement;
if (localContext == null && parent == null)
{
throw new RenderContextIncorrectException();
}
// Le <sigh>, InlineUIContainers are not allowed within hyperlinks.
if (localContext.WithinHyperlink)
{
RenderInlineChildren(element.Inlines, context);
return;
}
var paragraph = new Paragraph
{
FontSize = parent.FontSize * 0.8,
FontFamily = parent.FontFamily,
FontStyle = parent.FontStyle,
FontWeight = parent.FontWeight
};
var childContext = new InlineRenderContext(paragraph.Inlines, context)
{
Parent = paragraph
};
RenderInlineChildren(element.Inlines, childContext);
var richTextBlock = CreateOrReuseRichTextBlock(new UIElementCollectionRenderContext(null, context));
richTextBlock.Blocks.Add(paragraph);
var border = new Border
{
Padding = new Thickness(0, 0, 0, paragraph.FontSize * 0.2),
Child = richTextBlock
};
var inlineUIContainer = new InlineUIContainer
{
Child = border
};
// Add it to the current inlines
localContext.InlineCollection.Add(inlineUIContainer);
}
/// <summary>
/// Renders a superscript element.
/// </summary>
/// <param name="element"> The parsed inline element to render. </param>
/// <param name="context"> Persistent state. </param>
protected override void RenderSuperscriptRun(SuperscriptTextInline element, IRenderContext context)
{
var localContext = context as InlineRenderContext;
var parent = localContext?.Parent as TextElement;
if (localContext == null && parent == null)
{
throw new RenderContextIncorrectException();
}
// Le <sigh>, InlineUIContainers are not allowed within hyperlinks.
if (localContext.WithinHyperlink)
{
RenderInlineChildren(element.Inlines, context);
return;
}
var span = new Span()
{
FontSize = parent.FontSize * 0.8,
FontFamily = parent.FontFamily,
FontStyle = parent.FontStyle,
FontWeight = parent.FontWeight,
BaselineAlignment = BaselineAlignment.TextTop
};
if (parent is Span parentspan)
{
span.BaselineAlignment = parentspan.BaselineAlignment switch
{
BaselineAlignment.Bottom => BaselineAlignment.Subscript,
BaselineAlignment.Baseline => BaselineAlignment.Center,
BaselineAlignment.Center => BaselineAlignment.TextTop,
BaselineAlignment.TextTop => BaselineAlignment.Top,
BaselineAlignment.Subscript => BaselineAlignment.Baseline,
_ => BaselineAlignment.TextTop
};
}
var childContext = new InlineRenderContext(span.Inlines, context)
{
Parent = span
};
RenderInlineChildren(element.Inlines, childContext);
localContext.InlineCollection.Add(span);
}
/// <summary>
/// Finds the next inline element by matching trip chars and verifying the match.
/// </summary>
/// <param name="markdown"> The markdown text to parse. </param>
/// <param name="start"> The position to start parsing. </param>
/// <param name="end"> The position to stop parsing. </param>
/// <param name="ignoreLinks"> Indicates whether to parse links. </param>
/// <returns>Returns the next element</returns>
private static InlineParseResult FindNextInlineElement(string markdown, int start, int end, bool ignoreLinks)
{
// Search for the next inline sequence.
for (int pos = start; pos < end; pos++)
{
// IndexOfAny should be the fastest way to skip characters we don't care about.
pos = markdown.IndexOfAny(_tripCharacters, pos, end - pos);
if (pos < 0)
{
break;
}
// Find the trigger(s) that matched.
char currentChar = markdown[pos];
foreach (InlineTripCharHelper currentTripChar in _triggerList)
{
// Check if our current char matches the suffix char.
if (currentChar == currentTripChar.FirstChar)
{
// Don't match if the previous character was a backslash.
if (pos > start && markdown[pos - 1] == '\\')
{
continue;
}
// If we are here we have a possible match. Call into the inline class to verify.
InlineParseResult parseResult = null;
switch (currentTripChar.Method)
{
case InlineParseMethod.BoldItalic:
parseResult = BoldItalicTextInline.Parse(markdown, pos, end);
break;
case InlineParseMethod.Comment:
parseResult = CommentInline.Parse(markdown, pos, end);
break;
case InlineParseMethod.LinkReference:
parseResult = LinkAnchorInline.Parse(markdown, pos, end);
break;
case InlineParseMethod.Bold:
parseResult = BoldTextInline.Parse(markdown, pos, end);
break;
case InlineParseMethod.Italic:
parseResult = ItalicTextInline.Parse(markdown, pos, end);
break;
case InlineParseMethod.MarkdownLink:
if (!ignoreLinks)
{
parseResult = MarkdownLinkInline.Parse(markdown, pos, end);
}
break;
case InlineParseMethod.AngleBracketLink:
if (!ignoreLinks)
{
parseResult = HyperlinkInline.ParseAngleBracketLink(markdown, pos, end);
}
break;
case InlineParseMethod.Url:
if (!ignoreLinks)
{
parseResult = HyperlinkInline.ParseUrl(markdown, pos, end);
}
break;
case InlineParseMethod.RedditLink:
if (!ignoreLinks)
{
parseResult = HyperlinkInline.ParseRedditLink(markdown, pos, end);
}
break;
case InlineParseMethod.PartialLink:
if (!ignoreLinks)
{
parseResult = HyperlinkInline.ParsePartialLink(markdown, pos, end);
}
break;
case InlineParseMethod.Email:
if (!ignoreLinks)
{
parseResult = HyperlinkInline.ParseEmailAddress(markdown, start, pos, end);
}
break;
case InlineParseMethod.Strikethrough:
parseResult = StrikethroughTextInline.Parse(markdown, pos, end);
break;
case InlineParseMethod.Superscript:
parseResult = SuperscriptTextInline.Parse(markdown, pos, end);
break;
case InlineParseMethod.Subscript:
parseResult = SubscriptTextInline.Parse(markdown, pos, end);
break;
case InlineParseMethod.Code:
parseResult = CodeInline.Parse(markdown, pos, end);
break;
case InlineParseMethod.Image:
parseResult = ImageInline.Parse(markdown, pos, end);
break;
case InlineParseMethod.Emoji:
parseResult = EmojiInline.Parse(markdown, pos, end);
break;
}
if (parseResult != null)
{
return(parseResult);
}
}
}
}
// If we didn't find any elements we have a normal text block.
// Let us consume the entire range.
return(new InlineParseResult(TextRunInline.Parse(markdown, start, end), start, end));
}
/// <summary> /// Renders a superscript element. /// </summary> /// <param name="element"> The parsed inline element to render. </param> /// <param name="context"> Persistent state. </param> protected abstract void RenderSuperscriptRun(SuperscriptTextInline element, IRenderContext context);
protected override void RenderSuperscriptRun(SuperscriptTextInline element, IRenderContext context)
{
//throw new NotImplementedException();
}
protected override void RenderSuperscriptRun(SuperscriptTextInline element, IRenderContext context)
{
}
/// <summary>
/// Renders a superscript element.
/// </summary>
/// <param name="inlineCollection"> The list to add to. </param>
/// <param name="element"> The parsed inline element to render. </param>
/// <param name="parent"> The container element. </param>
/// <param name="context"> Persistent state. </param>
private void RenderSuperscriptRun(InlineCollection inlineCollection, SuperscriptTextInline element, TextElement parent, RenderContext context)
{
// Le <sigh>, InlineUIContainers are not allowed within hyperlinks.
if (context.WithinHyperlink)
{
RenderInlineChildren(inlineCollection, element.Inlines, parent, context);
return;
}
var paragraph = new Paragraph();
paragraph.FontSize = parent.FontSize * 0.8;
paragraph.FontFamily = parent.FontFamily;
paragraph.FontStyle = parent.FontStyle;
paragraph.FontWeight = parent.FontWeight;
RenderInlineChildren(paragraph.Inlines, element.Inlines, paragraph, context);
var richTextBlock = CreateOrReuseRichTextBlock(null, context);
richTextBlock.Blocks.Add(paragraph);
var border = new Border();
border.Padding = new Thickness(0, 0, 0, paragraph.FontSize * 0.2);
border.Child = richTextBlock;
var inlineUIContainer = new InlineUIContainer();
inlineUIContainer.Child = border;
// Add it to the current inlines
inlineCollection.Add(inlineUIContainer);
}
/// <summary>
/// Renders a link element
/// </summary>
/// <param name="inlineCollection"> The list to add to. </param>
/// <param name="element"> The parsed inline element to render. </param>
/// <param name="parent"> The container element. </param>
/// <param name="context"> Persistent state. </param>
private void RenderMarkdownLink(InlineCollection inlineCollection, MarkdownLinkInline element, TextElement parent, RenderContext context)
{
// Avoid crash when link text is empty.
if (element.Inlines.Count == 0)
return;
// Attempt to resolve references.
element.ResolveReference(this.document);
if (element.Url == null)
{
// The element couldn't be resolved, just render it as text.
RenderInlineChildren(inlineCollection, element.Inlines, parent, context);
return;
}
// HACK: Superscript is not allowed within a hyperlink. But if we switch it around, so
// that the superscript is outside the hyperlink, then it will render correctly.
// This assumes that the entire hyperlink is to be rendered as superscript.
if (AllTextIsSuperscript(element) == false)
{
// Regular ol' hyperlink.
var link = new Hyperlink();
// Register the link
this.linkRegister.RegisterNewHyperLink(link, element.Url);
// Remove superscripts.
RemoveSuperscriptRuns(element, insertCaret: true);
// Render the children into the link inline.
var childContext = context.Clone();
childContext.WithinHyperlink = true;
RenderInlineChildren(link.Inlines, element.Inlines, link, childContext);
context.TrimLeadingWhitespace = childContext.TrimLeadingWhitespace;
// Add it to the current inlines
inlineCollection.Add(link);
}
else
{
// THE HACK IS ON!
// Create a fake superscript element.
var fakeSuperscript = new SuperscriptTextInline();
fakeSuperscript.Inlines = new List<MarkdownInline> { element };
// Remove superscripts.
RemoveSuperscriptRuns(element, insertCaret: false);
// Now render it.
RenderSuperscriptRun(inlineCollection, fakeSuperscript, parent, context);
}
}
