private NavigationItem ParseListItemBlock(ListItemBlock listItemBlock)
{
DisplayLink rootLink = default;
List <NavigationItem> children = new List <NavigationItem>();
foreach (var listItemChild in listItemBlock)
{
switch (listItemChild)
{
case ParagraphBlock paragraphBlock:
rootLink = ParseParagraph(paragraphBlock);
break;
case ListBlock listBlock:
children.AddRange(ParseListBlock(listBlock));
break;
default:
throw new InvalidOperationException(
$"Document contains invalid navigation document syntax at {listItemBlock.ToPositionText()}. Expected paragraph.");
}
}
if (rootLink.Equals(default(DisplayLink)))
{
return(default);
// stops automatic scrolling
private void InvalidatesScrollTimer()
{
if (DisplayLink == null)
{
return;
}
if (DisplayLink.Paused)
{
DisplayLink.Invalidate();
}
userInfos.Remove(DisplayLink);
DisplayLink = null;
}
// sets up the scrolling in the correct direction
// utilizes CSDisplayLink, a timer synchronized to the display refresh rate, to execute the smooth automated scrolling
private void SetupScrollTimerInDirection(ScrollingDirection direction)
{
if (DisplayLink != null && !DisplayLink.Paused)
{
var userInfo = userInfos[DisplayLink];
var scrollingDirection = userInfo[ScrollingDirectionKey];
var number = (NSNumber)NSNumber.FromObject(scrollingDirection);
ScrollingDirection oldDirection = (ScrollingDirection)number.Int32Value;
if (direction == oldDirection)
{
return;
}
}
InvalidatesScrollTimer();
DisplayLink = CADisplayLink.Create(HandleScroll);
userInfos.Add(DisplayLink, NSDictionary.FromObjectAndKey(NSNumber.FromInt32((int)direction), new NSString(ScrollingDirectionKey)));
DisplayLink.AddToRunLoop(NSRunLoop.Main, NSRunLoop.NSRunLoopCommonModes);
}
public override void EnterMessageLoop(bool runInBackground)
{
DisplayLink = CADisplayLink.Create(Window, new Selector("Render"));
DisplayLink.AddToRunLoop(NSRunLoop.Current, NSRunLoopMode.Default);
NSRunLoop.Current.Run();
}
/// <summary>
/// Adds a display mapping to this page.
/// </summary>
internal void AddDisplayLink( DisplayLink displayLink )
{
displayLinks.Add( displayLink );
}
public override bool Match(InlineProcessor processor, ref StringSlice slice)
{
var startPosition = processor.GetSourcePosition(slice.Start, out var startLine, out var startCiColumn);
var start = slice.Start;
var end = start;
// skip opening '['
var current = slice.NextChar();
while (current != ']' && current != '\0')
{
end = slice.Start;
current = slice.NextChar();
}
// label should end at ']'
if (current != ']')
{
return(false);
}
// skip ']'
current = slice.NextChar();
// uri part should start with '('
if (current != '(')
{
return(false);
}
// skip '('
current = slice.NextChar();
while (current != ')' && current != '\0')
{
end = slice.Start;
current = slice.NextChar();
}
// uri part should end with ')'
if (current != ')')
{
return(false);
}
end = slice.Start;
slice.NextChar();
var endPosition = processor.GetSourcePosition(slice.Start - 1);
var linkText = new StringSlice(slice.Text, start, end).ToString();
try
{
var link = DisplayLinkParser.Parse(linkText);
if (link.Link.IsXref)
{
var xref = link.Link.Xref !.Value;
link = new DisplayLink(
link.Title,
new Link(_router.FullyQualify(xref)));
}
processor.Inline = new DisplayLinkInline
{
Span = new SourceSpan(startPosition, endPosition),
Line = startLine,
Column = startCiColumn,
IsClosed = true,
DisplayLink = link
};
}
catch (Exception x)
{
throw new InvalidOperationException(
$"Invalid link '{linkText}'", x);
}
return(true);
}
