/// <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); }
static Common() { BoldItalicTextInline.AddTripChars(_triggerList); BoldTextInline.AddTripChars(_triggerList); ItalicTextInline.AddTripChars(_triggerList); MarkdownLinkInline.AddTripChars(_triggerList); HyperlinkInline.AddTripChars(_triggerList); CommentInline.AddTripChars(_triggerList); StrikethroughTextInline.AddTripChars(_triggerList); SuperscriptTextInline.AddTripChars(_triggerList); SubscriptTextInline.AddTripChars(_triggerList); CodeInline.AddTripChars(_triggerList); ImageInline.AddTripChars(_triggerList); EmojiInline.AddTripChars(_triggerList); LinkAnchorInline.AddTripChars(_triggerList); // Create an array of characters to search against using IndexOfAny. _tripCharacters = _triggerList.Select(trigger => trigger.FirstChar).Distinct().ToArray(); }
/// <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) { var localContext = context as InlineRenderContext; if (localContext == null) { 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) { // 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 = 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); // Add it to the current inlines localContext.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(fakeSuperscript, context); } }
/// <summary> /// Attempts to parse a superscript text span. /// </summary> /// <param name="markdown"> The markdown text. </param> /// <param name="start"> The location to start parsing. </param> /// <param name="maxEnd"> The location to stop parsing. </param> /// <returns> A parsed superscript text span, or <c>null</c> if this is not a superscript text span. </returns> internal static InlineParseResult Parse(string markdown, int start, int maxEnd) { // Check the first character. bool isHTMLSequence = false; if (start == maxEnd || (markdown[start] != '^' && markdown[start] != '<')) { return(null); } if (markdown[start] != '^') { if (maxEnd - start < 5) { return(null); } else if (markdown.Substring(start, 5) != "<sup>") { return(null); } else { isHTMLSequence = true; } } if (isHTMLSequence) { int innerStart = start + 5; int innerEnd, end; innerEnd = Common.IndexOf(markdown, "</sup>", innerStart, maxEnd); if (innerEnd == -1) { return(null); } if (innerEnd == innerStart) { return(null); } if (ParseHelpers.IsMarkdownWhiteSpace(markdown[innerStart]) || ParseHelpers.IsMarkdownWhiteSpace(markdown[innerEnd - 1])) { return(null); } // We found something! end = innerEnd + 6; var result = new SuperscriptTextInline { Inlines = Common.ParseInlineChildren(markdown, innerStart, innerEnd) }; return(new InlineParseResult(result, start, end)); } else { // The content might be enclosed in parentheses. int innerStart = start + 1; int innerEnd, end; if (innerStart < maxEnd && markdown[innerStart] == '(') { // Find the end parenthesis. innerStart++; innerEnd = Common.IndexOf(markdown, ')', innerStart, maxEnd); if (innerEnd == -1) { return(null); } end = innerEnd + 1; } else { // Search for the next whitespace character. innerEnd = Common.FindNextWhiteSpace(markdown, innerStart, maxEnd, ifNotFoundReturnLength: true); if (innerEnd == innerStart) { // No match if the character after the caret is a space. return(null); } end = innerEnd; } // We found something! var result = new SuperscriptTextInline { Inlines = Common.ParseInlineChildren(markdown, innerStart, innerEnd) }; return(new InlineParseResult(result, start, end)); } }
/// <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)); }