/// <summary>
/// Renders a bold run element.
/// </summary>
/// <param name="element"> The parsed inline element to render. </param>
/// <param name="context"> Persistent state. </param>
protected override void RenderBoldRun(BoldTextInline element, IRenderContext context)
{
var localContext = context as InlineRenderContext;
if (localContext == null)
{
throw new RenderContextIncorrectException();
}
// Create the text run
Span boldSpan = new Span
{
FontWeight = FontWeights.Bold
};
var childContext = new InlineRenderContext(boldSpan.Inlines, context)
{
Parent = boldSpan,
WithinBold = true
};
// Render the children into the bold inline.
RenderInlineChildren(element.Inlines, childContext);
// Add it to the current inlines
localContext.InlineCollection.Add(boldSpan);
}
/// <summary>
/// Renders a text run element.
/// </summary>
/// <param name="element"> The parsed inline element to render. </param>
/// <param name="context"> Persistent state. </param>
protected override void RenderItalicRun(ItalicTextInline element, IRenderContext context)
{
var localContext = context as InlineRenderContext;
if (localContext == null)
{
throw new RenderContextIncorrectException();
}
// Create the text run
Span italicSpan = new Span
{
FontStyle = FontStyle.Italic
};
var childContext = new InlineRenderContext(italicSpan.Inlines, context)
{
Parent = italicSpan,
WithinItalics = true
};
// Render the children into the italic inline.
RenderInlineChildren(element.Inlines, childContext);
// Add it to the current inlines
localContext.InlineCollection.Add(italicSpan);
}
/// <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 strikethrough element.
/// </summary>
/// <param name="element"> The parsed inline element to render. </param>
/// <param name="context"> Persistent state. </param>
protected override void RenderStrikethroughRun(StrikethroughTextInline element, IRenderContext context)
{
var localContext = context as InlineRenderContext;
if (localContext == null)
{
throw new RenderContextIncorrectException();
}
Span span = new Span();
if (TextDecorationsSupported)
{
span.TextDecorations = TextDecorations.Strikethrough;
}
else
{
span.FontFamily = new FontFamily("Consolas");
}
var childContext = new InlineRenderContext(span.Inlines, context)
{
Parent = span
};
// Render the children into the inline.
RenderInlineChildren(element.Inlines, childContext);
if (!TextDecorationsSupported)
{
AlterChildRuns(span, (parentSpan, run) =>
{
var text = run.Text;
var builder = new StringBuilder(text.Length * 2);
foreach (var c in text)
{
builder.Append((char)0x0336);
builder.Append(c);
}
run.Text = builder.ToString();
});
}
// Add it to the current inlines
localContext.InlineCollection.Add(span);
}
/// <summary>
/// Renders a paragraph element.
/// </summary>
protected override void RenderParagraph(ParagraphBlock element, IRenderContext context)
{
var paragraph = new Paragraph
{
Margin = ParagraphMargin,
LineHeight = ParagraphLineHeight
};
var childContext = new InlineRenderContext(paragraph.Inlines, context)
{
Parent = paragraph
};
RenderInlineChildren(element.Inlines, childContext);
var textBlock = CreateOrReuseRichTextBlock(context);
textBlock.Blocks.Add(paragraph);
}
/// <summary>
/// Renders a subscript element.
/// </summary>
/// <param name="element"> The parsed inline element to render. </param>
/// <param name="context"> Persistent state. </param>
protected override void RenderSubscriptRun(SubscriptTextInline element, IRenderContext context)
{
var localContext = context as InlineRenderContext;
var parent = localContext?.Parent as TextElement;
if (localContext == null && parent == null)
{
throw new RenderContextIncorrectException();
}
var paragraph = new Paragraph
{
FontSize = parent.FontSize * 0.7,
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
{
Margin = new Thickness(0, 0, 0, (-1) * (paragraph.FontSize * 0.6)),
Child = richTextBlock
};
var inlineUIContainer = new InlineUIContainer
{
Child = border
};
// Add it to the current inlines
localContext.InlineCollection.Add(inlineUIContainer);
}
/// <summary>
/// Renders a table element.
/// </summary>
protected override void RenderTable(TableBlock element, IRenderContext context)
{
if (!(context is UIElementCollectionRenderContext localContext))
{
throw new RenderContextIncorrectException();
}
var blockUIElementCollection = localContext.BlockUIElementCollection;
var table = new MarkdownTable(element.ColumnDefinitions.Count, element.Rows.Count, TableBorderThickness, TableBorderBrush)
{
HorizontalAlignment = HorizontalAlignment.Left,
Margin = TableMargin
};
// Add each row.
for (int rowIndex = 0; rowIndex < element.Rows.Count; rowIndex++)
{
var row = element.Rows[rowIndex];
// Add each cell.
for (int cellIndex = 0; cellIndex < Math.Min(element.ColumnDefinitions.Count, row.Cells.Count); cellIndex++)
{
var cell = row.Cells[cellIndex];
// Cell content.
var cellContent = CreateOrReuseRichTextBlock(new UIElementCollectionRenderContext(null, context));
cellContent.Margin = TableCellPadding;
Grid.SetRow(cellContent, rowIndex);
Grid.SetColumn(cellContent, cellIndex);
switch (element.ColumnDefinitions[cellIndex].Alignment)
{
case ColumnAlignment.Center:
cellContent.TextAlignment = TextAlignment.Center;
break;
case ColumnAlignment.Right:
cellContent.TextAlignment = TextAlignment.Right;
break;
}
if (rowIndex == 0)
{
cellContent.FontWeight = FontWeights.Bold;
}
var paragraph = new Paragraph();
var childContext = new InlineRenderContext(paragraph.Inlines, context)
{
Parent = paragraph,
TrimLeadingWhitespace = true
};
RenderInlineChildren(cell.Inlines, childContext);
cellContent.Blocks.Add(paragraph);
table.Children.Add(cellContent);
}
}
blockUIElementCollection.Add(table);
}
/// <summary>
/// Renders a header element.
/// </summary>
protected override void RenderHeader(HeaderBlock element, IRenderContext context)
{
var textBlock = CreateOrReuseRichTextBlock(context);
var paragraph = new Paragraph();
var childInlines = paragraph.Inlines;
switch (element.HeaderLevel)
{
case 1:
paragraph.Margin = Header1Margin;
paragraph.FontSize = Header1FontSize;
paragraph.FontWeight = Header1FontWeight;
paragraph.Foreground = Header1Foreground;
break;
case 2:
paragraph.Margin = Header2Margin;
paragraph.FontSize = Header2FontSize;
paragraph.FontWeight = Header2FontWeight;
paragraph.Foreground = Header2Foreground;
break;
case 3:
paragraph.Margin = Header3Margin;
paragraph.FontSize = Header3FontSize;
paragraph.FontWeight = Header3FontWeight;
paragraph.Foreground = Header3Foreground;
break;
case 4:
paragraph.Margin = Header4Margin;
paragraph.FontSize = Header4FontSize;
paragraph.FontWeight = Header4FontWeight;
paragraph.Foreground = Header4Foreground;
break;
case 5:
paragraph.Margin = Header5Margin;
paragraph.FontSize = Header5FontSize;
paragraph.FontWeight = Header5FontWeight;
paragraph.Foreground = Header5Foreground;
break;
case 6:
paragraph.Margin = Header6Margin;
paragraph.FontSize = Header6FontSize;
paragraph.FontWeight = Header6FontWeight;
paragraph.Foreground = Header6Foreground;
var underline = new Underline();
childInlines = underline.Inlines;
paragraph.Inlines.Add(underline);
break;
}
// Render the children into the para inline.
var childContext = new InlineRenderContext(childInlines, context)
{
Parent = paragraph,
TrimLeadingWhitespace = true
};
RenderInlineChildren(element.Inlines, childContext);
// Add it to the blocks
textBlock.Blocks.Add(paragraph);
}
/// <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);
}
}
