/// <summary>
/// Выполнить команду.
/// </summary>
/// <param name="command">Команда.</param>
/// <returns>Остаток для последующего вызова.</returns>
public ITextRenderCommand ExecuteCommand(ITextRenderCommand command)
{
if (command == null || command.Content == null || command.Attributes == null || command.Content.Id == null)
{
return null;
}
if (!CommonTextRenderContent.Text.Equals(command.Content.Id, StringComparison.OrdinalIgnoreCase))
{
ExecuteNonText(command);
return null;
}
var txt = command.Content as ITextRenderTextContent;
if (txt != null && txt.Text != null)
{
var remText = ExectuteText(command.Attributes, txt.Text);
if (string.IsNullOrEmpty(remText))
{
return null;
}
return new TextRenderCommand(command.Attributes, new TextRenderTextContent(remText));
}
return null;
}
/// <summary>
/// Выполнить не текстовую команду.
/// </summary>
/// <param name="command">Команда.</param>
protected virtual void ExecuteNonText(ITextRenderCommand command)
{
if (CommonTextRenderContent.LineBreak.Equals(command.Content.Id))
{
NewLine(command.Attributes);
}
}
private double GetElementWidth(ITextRenderCommand command)
{
return WidthCache.GetValue(Factory.GetCacheKey(command), () => Factory.MeasureCommand(command).Width);
}
private void AddElementToCanvas(ITextRenderCommand command)
{
if (command == null)
{
return;
}
Size size;
if (IsMeasureMode)
{
size = Factory.MeasureCommand(command);
}
else
{
size = Factory.DrawCommand(new Point() { X = LineWidth, Y = Top }, Session, command);
}
LineWidth += size.Width;
if (LineHeight < size.Height)
{
LineHeight = size.Height;
SynCanvasHeight();
}
FirstInLine = false;
}
private double GetElementWidth(string key, ITextRenderCommand command)
{
return GetElementWidth(key, () => Factory.Create(command));
}
private void Execute(ITextRenderCommand command)
{
int counter = 1000;
while (command != null && counter > 0 && !ExceedLines)
{
counter--;
command = Executor.ExecuteCommand(command);
}
}
private Func<FrameworkElement> ExtractElement(string key, ITextRenderCommand command)
{
return ExtractElement(key, () => Factory.Create(command));
}
private FrameworkElement GetElement(string key, ITextRenderCommand command)
{
return GetElement(key, () => Factory.Create(command));
}
private string GetElementKey(ITextRenderCommand command)
{
return Factory.GetCacheKey(command);
}
/// <summary>
/// Инициализирует новый экземпляр класса <see cref="T:System.Object"/>.
/// </summary>
public RenderProgram(ITextRenderCommand[] commands)
{
if (commands == null) throw new ArgumentNullException(nameof(commands));
this.commands = commands;
}
/// <summary>
/// Создать элемент.
/// </summary>
/// <param name="command">Команда.</param>
/// <returns>Элемент.</returns>
public FrameworkElement Create(ITextRenderCommand command)
{
count++;
string text;
var textCnt = command.Content as ITextRenderTextContent;
if (textCnt != null)
{
text = textCnt.Text ?? "";
}
else
{
text = "";
}
var r = new TextBlock()
{
Foreground = Application.Current.Resources["PostNormalTextBrush"] as Brush,
TextWrapping = TextWrapping.NoWrap,
TextTrimming = TextTrimming.None,
FontSize = StyleManager.Text.PostFontSize,
TextLineBounds = TextLineBounds.Full,
IsTextSelectionEnabled = false,
TextAlignment = TextAlignment.Left
};
FrameworkElement result = r;
Border b = new Border();
bool needBorder = false;
Grid g = new Grid();
bool needGrid = false;
Grid g2 = new Grid();
bool needOuterGrid = false;
if (command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Bold))
{
r.FontWeight = FontWeights.Bold;
}
if (command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Italic))
{
r.FontStyle = FontStyle.Italic;
}
if (command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Fixed))
{
r.FontFamily = new FontFamily("Courier New");
}
if (command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Spoiler))
{
needBorder = true;
b.Background = Application.Current.Resources["PostSpoilerBackgroundBrush"] as Brush;
r.Foreground = Application.Current.Resources["PostSpoilerTextBrush"] as Brush;
}
if (command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Quote))
{
r.Foreground = Application.Current.Resources["PostQuoteTextBrush"] as Brush;
}
if (command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Link))
{
r.Foreground = Application.Current.Resources["PostLinkTextBrush"] as Brush;
}
b.BorderBrush = r.Foreground;
b.BorderThickness = new Thickness(0);
if (command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Undeline) || command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Link))
{
needBorder = true;
b.BorderThickness = new Thickness(b.BorderThickness.Left, b.BorderThickness.Top, b.BorderThickness.Right, 1.2);
}
if (command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Overline))
{
needBorder = true;
b.BorderThickness = new Thickness(b.BorderThickness.Left, 1.2, b.BorderThickness.Right, b.BorderThickness.Bottom);
}
Border strikeBorder = null;
if (command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Strikethrough))
{
needGrid = true;
strikeBorder = new Border()
{
Background = r.Foreground,
Height = 1.2,
HorizontalAlignment = HorizontalAlignment.Stretch,
VerticalAlignment = VerticalAlignment.Top,
};
g.Children.Add(strikeBorder);
}
if (command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Subscript) || command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Superscript))
{
needOuterGrid = true;
r.Measure(new Size(0, 0));
var fh = r.ActualHeight;
r.FontSize = r.FontSize * 2.0 / 3.0;
r.Measure(new Size(0, 0));
var fh2 = r.ActualHeight;
var delta = fh - fh2;
if (command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Subscript) &&
!command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Superscript))
{
g2.Padding = new Thickness(0, delta, 0, 0);
}
else if (!command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Subscript) &&
command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Superscript))
{
g2.Padding = new Thickness(0, 0, 0, delta);
}
else
{
g2.Padding = new Thickness(0, delta / 2, 0, delta / 2);
}
}
var spaceWidth = GetOWidth(command.Attributes, r);
int endSpaces = 0;
var s2 = text;
while (s2.EndsWith(" "))
{
endSpaces++;
s2 = s2.Substring(0, s2.Length - 1);
}
r.Text = s2;
r.Measure(new Size(0, 0));
r.Height = r.ActualHeight;
r.Width = r.ActualWidth + endSpaces * spaceWidth;
if (strikeBorder != null)
{
var oh = r.ActualHeight;
const double koef = 0.6;
strikeBorder.Margin = new Thickness(0, koef * oh, 0, 0);
}
if (needGrid)
{
g.Height = result.Height;
g.Width = result.Width;
g.Children.Add(result);
result = g;
}
if (needBorder)
{
b.Height = result.Height;
b.Width = result.Width;
b.Child = result;
result = b;
}
if (needOuterGrid)
{
g2.Height = result.Height + g2.Padding.Bottom + g2.Padding.Top;
g2.Width = result.Width;
g2.Children.Add(result);
result = g2;
}
if (command.Attributes.Attributes.ContainsKey(CommonTextRenderAttributes.Link))
{
var linkAttribute = command.Attributes.Attributes[CommonTextRenderAttributes.Link] as ITextRenderLinkAttribute;
if (linkAttribute != null)
{
RenderLinkClickHelper.SetupLinkActions(result, linkAttribute, linkClickCallback);
}
}
return result;
}
/// <summary>
/// Создать элемент.
/// </summary>
/// <param name="command">Команда.</param>
/// <returns>Элемент.</returns>
FrameworkElement ICanvasElementFactory.Create(ITextRenderCommand command)
{
return Create(command);
}
/// <summary>
/// Получить ключ кэша.
/// </summary>
/// <param name="command">Команда.</param>
/// <returns>Ключ кэша.</returns>
public string GetCacheKey(ITextRenderCommand command)
{
return command.GetCacheKey(isNarrow);
}
