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bold, italic, and better marked text support

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This commit is contained in:
bluepilledgreat 2024-02-03 00:33:31 +00:00
parent dd70d729f1
commit 70a39376c8
1 changed files with 47 additions and 58 deletions
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105
Bloxstrap/UI/Elements/Controls/MarkdownTextBlock.cs
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@ -18,6 +18,8 @@ namespace Bloxstrap.UI.Elements.Controls
[Localizability(LocalizationCategory.Text)]
class MarkdownTextBlock : TextBlock
{
private static MarkdownPipeline _markdownPipeline;
public static readonly DependencyProperty MarkdownTextProperty =
DependencyProperty.Register(nameof(MarkdownText), typeof(string), typeof(MarkdownTextBlock),
new FrameworkPropertyMetadata(string.Empty, FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender, OnTextMarkdownChanged));
@ -29,43 +31,39 @@ namespace Bloxstrap.UI.Elements.Controls
set => SetValue(MarkdownTextProperty, value);
}
/// <returns>Span, skip</returns>
private static (Span, int) GetInlineUntilEndTagDetected(Markdig.Syntax.Inlines.Inline? inline, string tagName)
{
string endTag = $"</{tagName}>"; // TODO: better way of doing this
var span = new Span();
int skip = 0;
var current = inline;
while (current is Markdig.Syntax.Inlines.Inline currentInline)
{
skip++;
if (currentInline is HtmlInline html)
{
if (html.Tag == endTag)
return (span, skip);
}
(var childInline, int childSkip) = GetWpfInlineFromMarkdownInline(currentInline);
if (childInline != null)
span.Inlines.Add(childInline);
skip += childSkip;
current = currentInline.NextSibling;
}
throw new Exception("End tag not detected");
}
/// <returns>Inline, skip</returns>
private static (System.Windows.Documents.Inline?, int) GetWpfInlineFromMarkdownInline(Markdig.Syntax.Inlines.Inline? inline)
private static System.Windows.Documents.Inline? GetWpfInlineFromMarkdownInline(Markdig.Syntax.Inlines.Inline? inline)
{
if (inline is LiteralInline literalInline)
{
return (new Run(literalInline.ToString()), 0);
return new Run(literalInline.ToString());
}
else if (inline is EmphasisInline emphasisInline)
{
switch (emphasisInline.DelimiterChar)
{
case '*':
case '_':
{
if (emphasisInline.DelimiterCount == 1) // 1 = italic
{
var childInline = new Italic(GetWpfInlineFromMarkdownInline(emphasisInline.FirstChild));
return childInline;
}
else // 2 = bold
{
var childInline = new Bold(GetWpfInlineFromMarkdownInline(emphasisInline.FirstChild));
return childInline;
}
}
case '=': // marked
{
var childInline = new Span(GetWpfInlineFromMarkdownInline(emphasisInline.FirstChild));
childInline.Background = new SolidColorBrush(Color.FromArgb(50, 255, 255, 255)); // TODO: better colour?
return childInline;
}
}
}
else if (inline is LinkInline linkInline)
{
@ -77,38 +75,23 @@ namespace Bloxstrap.UI.Elements.Controls
return GetWpfInlineFromMarkdownInline(textInline);
}
(var childInline, int skip) = GetWpfInlineFromMarkdownInline(textInline);
var childInline = GetWpfInlineFromMarkdownInline(textInline);
return (new Hyperlink(childInline)
return new Hyperlink(childInline)
{
Command = GlobalViewModel.OpenWebpageCommand,
CommandParameter = url
}, skip);
}
else if (inline is HtmlInline htmlInline)
{
string? tag = htmlInline.Tag; // TODO: parse tag
var nextInline = htmlInline.NextSibling;
if (tag == "<highlight>")
{
(var span, int skip) = GetInlineUntilEndTagDetected(nextInline, "highlight");
span.Background = new SolidColorBrush(Color.FromArgb(50,255,255,255));
return (span, skip);
}
};
}
return (null, 0);
return null;
}
/// <returns>Skip</returns>
private int AddMarkdownInline(Markdig.Syntax.Inlines.Inline? inline)
private void AddMarkdownInline(Markdig.Syntax.Inlines.Inline? inline)
{
(var wpfInline, int skip) = GetWpfInlineFromMarkdownInline(inline);
var wpfInline = GetWpfInlineFromMarkdownInline(inline);
if (wpfInline != null)
Inlines.Add(wpfInline);
return skip;
}
private static void OnTextMarkdownChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs)
@ -119,7 +102,7 @@ namespace Bloxstrap.UI.Elements.Controls
if (dependencyPropertyChangedEventArgs.NewValue is not string rawDocument)
return;
MarkdownDocument document = Markdown.Parse(rawDocument);
MarkdownDocument document = Markdown.Parse(rawDocument, _markdownPipeline);
markdownTextBlock.Inlines.Clear();
@ -130,9 +113,15 @@ namespace Bloxstrap.UI.Elements.Controls
{
var inline = paragraphBlock.Inline.ElementAt(i);
int skip = markdownTextBlock.AddMarkdownInline(inline);
i += skip;
markdownTextBlock.AddMarkdownInline(inline);
}
}
static MarkdownTextBlock()
{
_markdownPipeline = new MarkdownPipelineBuilder()
.UseEmphasisExtras(Markdig.Extensions.EmphasisExtras.EmphasisExtraOptions.Marked) // enable '==' support
.Build();
}
}
}