/// <summary>
/// Registers the specified style with the command stream and returns its resulting index.
/// </summary>
private Int16 RegisterStyleWithCommandStream(TextLayoutCommandStream output, StringSegment name, out TextStyle style)
{
if (!registeredStyles.TryGetValue(name, out style))
throw new InvalidOperationException(UltravioletStrings.UnrecognizedStyle.Format(name));
return output.RegisterStyle(name, style);
}
/// <summary>
/// Pushes a style onto the style stack.
/// </summary>
/// <param name="style">The style to push onto the stack.</param>
/// <param name="bold">A value indicating whether the current font face is bold.</param>
/// <param name="italic">A value indicating whether the current font face is italic.</param>
private void PushStyle(TextStyle style, ref Boolean bold, ref Boolean italic)
{
var instance = new TextStyleInstance(style, bold, italic);
styleStack.Push(instance);
if (style.Font != null)
PushFont(style.Font);
if (style.Bold.HasValue)
bold = style.Bold.Value;
if (style.Italic.HasValue)
italic = style.Italic.Value;
}
/// <summary>
/// Initializes a new instance of the <see cref="TextStyleInstance"/> structure.
/// </summary>
/// <param name="style">The style that was applied.</param>
/// <param name="bold">A value indicating whether the font was bold before the style was applied.</param>
/// <param name="italic">A value indicating whether the font was italic before the style was applied.</param>
public TextStyleInstance(TextStyle style, Boolean bold, Boolean italic)
{
this.style = style;
this.bold = bold;
this.italic = italic;
}
/// <summary>
/// Registers a style with the specified name.
/// </summary>
/// <param name="name">The name of the style to register.</param>
/// <param name="style">The style to register.</param>
public void RegisterStyle(String name, TextStyle style)
{
Contract.RequireNotEmpty(name, "name");
registeredStyles.Add(name, style);
}
/// <summary>
/// Registers a style with the command stream.
/// </summary>
/// <param name="name">The name of the style to register.</param>
/// <param name="style">The style to register under the specified name.</param>
/// <returns>The index of the specified style within the command stream's internal registry.</returns>
public Int16 RegisterStyle(StringSegment name, TextStyle style) =>
(resources = resources ?? new TextLayoutCommandStreamResources()).RegisterStyle(name, style);
