public InlineImage(InlineImageCache cache = null)
{
_cache = cache;
}
private void Parse(Span span)
{
var context = new ParseContext(span);
while (true)
{
var token = La(1);
Consume();
switch (token.TokenType)
{
case BbCodeLexer.TokenStartTag:
ParseTag(token.Value, true, context);
break;
case BbCodeLexer.TokenEndTag:
ParseTag(token.Value, false, context);
break;
case BbCodeLexer.TokenText:
var parent = span;
// parse uri value for optional parameter and/or target, eg [url=cmd://foo|parameter|target]
if (NavigationHelper.TryParseUriWithParameters(context.NavigateUri, out var parsedUri, out var parsedParameter,
out var parsedTargetName))
{
var link = new Hyperlink {
ToolTip = context.NavigateUri
};
if (context.IconGeometry != null)
{
link.TextDecorations.Clear();
}
// assign ICommand instance if available, otherwise set NavigateUri
if (Commands != null && Commands.TryGetValue(parsedUri, out var command))
{
link.Command = command;
link.CommandParameter = parsedParameter;
if (parsedTargetName != null)
{
link.CommandTarget = _source?.FindName(parsedTargetName) as IInputElement;
}
}
else
{
link.NavigateUri = parsedUri;
link.TargetName = parsedParameter;
}
parent = link;
span.Inlines.Add(parent);
}
if (context.IconGeometry != null)
{
var icon = new Path {
Stretch = Stretch.Uniform,
Data = context.IconGeometry
};
icon.SetBinding(Shape.FillProperty, new Binding {
Path = new PropertyPath("(TextBlock.Foreground)"),
RelativeSource = new RelativeSource(RelativeSourceMode.Self),
});
var border = new Border {
Background = new SolidColorBrush(Colors.Transparent),
Child = icon,
ToolTip = new ToolTip {
Content = new TextBlock {
Text = token.Value
}
}
};
border.SetBinding(FrameworkElement.HeightProperty, new Binding {
Path = new PropertyPath("(TextBlock.FontSize)"),
RelativeSource = new RelativeSource(RelativeSourceMode.Self),
Converter = new MultiplyConverter(),
ConverterParameter = 0.7
});
border.SetBinding(FrameworkElement.WidthProperty, new Binding {
Path = new PropertyPath(nameof(Border.Height)),
RelativeSource = new RelativeSource(RelativeSourceMode.Self)
});
parent.Inlines.Add(new InlineUIContainer {
Child = border
});
continue;
}
{
Uri url;
ImageSource imageSource = null;
double maxSize;
bool expand, toolTip;
InlineImageCache cache;
if (context.ImageUri?.StartsWith(@"emoji://") == true)
{
maxSize = 0;
expand = false;
toolTip = false;
var emojiCode = context.ImageUri.Substring(8);
url = BbCodeBlock.OptionEmojiProvider?.GetUri(emojiCode);
if (url == null)
{
cache = null;
imageSource = BbCodeBlock.OptionEmojiProvider?.GetImageSource(emojiCode);
}
else
{
cache = BbCodeBlock.OptionEmojiCacheDirectory == null ? null :
_emojiCache ?? (_emojiCache = new InlineImageCache(BbCodeBlock.OptionEmojiCacheDirectory));
}
}
else
{
toolTip = true;
if (NavigationHelper.TryParseUriWithParameters(context.ImageUri, out var temporary, out var parameter, out _))
{
try {
url = new Uri(temporary.OriginalString);
if (double.TryParse(parameter, out maxSize))
{
expand = true;
}
else
{
maxSize = double.NaN;
expand = false;
}
cache = BbCodeBlock.OptionImageCacheDirectory == null ? null :
_imageCache ?? (_imageCache = new InlineImageCache(BbCodeBlock.OptionImageCacheDirectory));
} catch {
url = null;
maxSize = double.NaN;
expand = false;
cache = null;
}
}