public void Mark(IHtmlElement element)
{
Contract.RequiresNotNull(element, "element");
if (Element != null)
{
// unmark first - maybe it was marked with another color before
Unmark();
}
Element = element;
var markerCountAttr = Element.GetAttribute(Attribute_MarkerCount);
if (string.IsNullOrEmpty(markerCountAttr))
{
Element.SetAttribute(Attribute_OrigStyle, Element.Style);
myMarkerIdx = 0;
}
else
{
myMarkerIdx = int.Parse(markerCountAttr);
}
var markupStyle = string.Format(";color:black;background-color:{0}", ColorTranslator.ToHtml(Color));
Element.SetAttribute(Attribute_Marker + myMarkerIdx, markupStyle);
Element.SetAttribute(Attribute_MarkerCount, (myMarkerIdx + 1).ToString());
Element.Style = Element.GetAttribute(Attribute_OrigStyle) + markupStyle;
}
/// <summary>
/// 设置样式值
/// </summary>
/// <param name="name">样式名</param>
/// <param name="value">样式值</param>
/// <returns>样式管理器自身</returns>
public virtual CssStyle SetValue(string name, string value)
{
settings[name] = value;
_element.SetAttribute("style", GetStyleExpression(settings));
return(this);
}
/// <summary>
/// 设置样式值
/// </summary>
/// <param name="name">样式名</param>
/// <param name="value">样式值（若为 null 则移除样式）</param>
/// <returns>样式管理器自身</returns>
public virtual StyleManager SetValue(string name, string value)
{
lock (_element.SyncRoot)
{
EnsureStyle();
_style[name] = value;
_element.SetAttribute("style", _style.ToString(), out _attribute);
return(this);
}
}
/// <summary>
/// 返回元素的唯一ID，没有ID属性，或者有但非唯一，返回null
/// </summary>
/// <param name="element">要标识的元素</param>
/// <param name="create">指示当没有唯一ID时是否创建一个</param>
/// <param name="ancestorsCreate">在创建ID的过程中，是否为没有唯一ID的父级也创建ID</param>
/// <returns>元素的唯一ID。</returns>
public static string Identity(this IHtmlElement element, bool create, bool ancestorsCreate)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
EnsureAllocated(element);
var id = element.Attribute("id").Value();
if (string.IsNullOrEmpty(id) || !element.Document.AllElements().Where(e => e.Attribute("id").Value() == id).IsSingle())
{
id = null;
}
if (create && id == null)
{
element.SetAttribute("id", id = CreateIdentity(element, ancestorsCreate));
}
return(id);
}
/// <summary>
/// 派生类重写此方法对拥有 Action URL 的元素进行处理
/// </summary>
/// <param name="element">要处理的元素</param>
/// <returns>元素是否包含 Action URL 并已经进行处理。</returns>
protected virtual bool ProcessActionLink(IHtmlElement element)
{
if (element.Attribute("action") == null)
{
return(false);
}
string attributeName;
if (element.Name.EqualsIgnoreCase("a"))
{
attributeName = "href";
}
else if (element.Name.EqualsIgnoreCase("img") || element.Name.EqualsIgnoreCase("script"))
{
attributeName = "src";
}
else if (element.Name.EqualsIgnoreCase("form") && element.Attribute("controller") != null)
{
attributeName = "action";
}
else
{
return(false);
}
var action = element.Attribute("action").Value() ?? RouteData.Values["action"].CastTo <string>();
var controller = element.Attribute("controller").Value() ?? RouteData.Values["controller"].CastTo <string>();
var routeValues = UrlHelper.GetRouteValues(element);
element.RemoveAttribute("action");
element.RemoveAttribute("controller");
element.RemoveAttribute("inherits");
var url = UrlHelper.Action(action, controller, routeValues);
if (url == null)
{
element.Attribute(attributeName).Remove();
}
else
{
element.SetAttribute(attributeName, url);
}
return(true);
}
/// <summary>
/// 更新 class 属性
/// </summary>
private void UpdateClass()
{
if (_classes.Any())
{
_element.SetAttribute("class", _rawValue = string.Join(" ", _classes.ToArray()));
}
else
{
_element.RemoveAttribute("class");
}
}
/// <summary>
/// 提供数据绑定的核心方法。
/// </summary>
/// <param name="context">绑定上下文</param>
/// <param name="path">绑定路径</param>
/// <param name="value">绑定值</param>
/// <param name="nullBehavior">为空时执行的操作</param>
private static void BindCore(this IHtmlElement element, string path, string value, BindingNullBehavior nullBehavior)
{
if (value == null)
{
switch (nullBehavior)
{
case BindingNullBehavior.Ignore:
break;
case BindingNullBehavior.Hidden:
BindingContext.Action(element, e => e.Style().SetValue("visibility", "hidden"));
break;
case BindingNullBehavior.Remove:
BindingContext.Action(element, e => e.Remove());
break;
case BindingNullBehavior.DisplayNone:
BindingContext.Action(element, e => e.Style().SetValue("display", "none"));
break;
default:
throw new NotSupportedException();
}
return;
}
var attributeMatch = attributePathRegex.Match(path);
if (attributeMatch.Success)
{
string attributeName = attributeMatch.Groups["name"].Value;
BindingContext.Action(element, e => element.SetAttribute(attributeName, value));
}
if (path == "@:text")
{
BindingContext.Action(element, e => e.InnerText(value));
}
if (path == "@:html")
{
BindingContext.Action(element, e => e.InnerHtml(value));
}
return;
}
/// <summary>
/// Sanitizes the style.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="baseUrl">The base URL.</param>
protected void SanitizeStyle(IHtmlElement element, string baseUrl)
{
// filter out invalid CSS declarations
// see https://github.com/AngleSharp/AngleSharp/issues/101
if (element.GetAttribute("style") == null)
{
return;
}
element.SetAttribute("style", element.Style.ToCss());
var styles = element.Style;
if (styles == null || styles.Length == 0)
{
return;
}
SanitizeStyleDeclaration(element, styles, baseUrl);
}
/// <summary>
/// 派生类重写此方法对拥有 Action URL 的元素进行处理
/// </summary>
/// <param name="element">要处理的元素</param>
/// <returns>元素是否包含 Action URL 并已经进行处理。</returns>
protected virtual bool ProcessActionLink( IHtmlElement element )
{
if ( element.Attribute( "action" ) == null )
return false;
string attributeName;
if ( element.Name.EqualsIgnoreCase( "a" ) )
attributeName = "href";
else if ( element.Name.EqualsIgnoreCase( "img" ) || element.Name.EqualsIgnoreCase( "script" ) )
attributeName = "src";
else if ( element.Name.EqualsIgnoreCase( "form" ) && element.Attribute( "controller" ) != null )
attributeName = "action";
else
return false;
var action = element.Attribute( "action" ).Value() ?? RouteData.Values["action"].CastTo<string>();
var controller = element.Attribute( "controller" ).Value() ?? RouteData.Values["controller"].CastTo<string>();
var routeValues = UrlHelper.GetRouteValues( element );
element.RemoveAttribute( "action" );
element.RemoveAttribute( "controller" );
element.RemoveAttribute( "inherits" );
var url = UrlHelper.Action( action, controller, routeValues );
if ( url == null )
element.Attribute( attributeName ).Remove();
else
element.SetAttribute( attributeName, url );
return true;
}
/// <summary>
/// Sanitizes the style.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="baseUrl">The base URL.</param>
protected void SanitizeStyle(IHtmlElement element, string baseUrl)
{
// filter out invalid CSS declarations
// see https://github.com/FlorianRappl/AngleSharp/issues/101
if (element.GetAttribute("style") == null) return;
element.SetAttribute("style", element.Style.ToCss());
var styles = element.Style;
if (styles == null || styles.Length == 0) return;
var removeStyles = new List<Tuple<ICssProperty, RemoveReason>>();
var setStyles = new Dictionary<string, string>();
foreach (var style in styles)
{
var key = DecodeCss(style.Name);
var val = DecodeCss(style.Value);
if (!AllowedCssProperties.Contains(key))
{
removeStyles.Add(new Tuple<ICssProperty, RemoveReason>(style, RemoveReason.NotAllowedStyle));
continue;
}
if(CssExpression.IsMatch(val) || DisallowCssPropertyValue.IsMatch(val))
{
removeStyles.Add(new Tuple<ICssProperty, RemoveReason>(style, RemoveReason.NotAllowedValue));
continue;
}
var urls = CssUrl.Matches(val);
if (urls.Count > 0)
{
if (urls.Cast<Match>().Any(m => GetSafeUri(m.Groups[2].Value) == null || SanitizeUrl(m.Groups[2].Value, baseUrl) == null))
removeStyles.Add(new Tuple<ICssProperty, RemoveReason>(style, RemoveReason.NotAllowedUrlValue));
else
{
var s = CssUrl.Replace(val, m => "url(" + m.Groups[1].Value + SanitizeUrl(m.Groups[2].Value, baseUrl) + m.Groups[3].Value);
if (s != val)
{
if (key != style.Name)
{
removeStyles.Add(new Tuple<ICssProperty, RemoveReason>(style, RemoveReason.NotAllowedUrlValue));
}
setStyles[key] = s;
}
}
}
}
foreach (var style in removeStyles)
{
RemoveStyle(element, styles, style.Item1, style.Item2);
}
foreach (var style in setStyles)
{
styles.SetProperty(style.Key, style.Value);
}
}
private static void ParseProperty(XamlProperty property, IHtmlDocument htmlDocument, IHtmlElement element)
{
if (property.IsCollection)
{
foreach (var prp in property.CollectionElements)
{
if (prp is XamlObject)
{
if (((XamlObject)prp).Instance is FrameworkElement)
{
ParseObject((XamlObject)prp, htmlDocument, element);
}
}
}
}
else
{
if (!string.IsNullOrEmpty(property.ParentObject.ContentPropertyName) && property.PropertyName == property.ParentObject.ContentPropertyName)
{
ParseObject(property.PropertyValue, htmlDocument, element);
}
else
{
switch (property.PropertyName)
{
case "Row":
{
var rw = Convert.ToInt32(property.ValueOnInstance);
//element.Style.SetProperty("grid-row", (rw + 1).ToString());
return;
}
case "RowSpan":
{
//element.Style.SetProperty("grid-row-span", property.ValueOnInstance.ToString());
return;
}
case "Column":
{
var rw = Convert.ToInt32(property.ValueOnInstance);
//element.Style.SetProperty("grid-column", (rw + 1).ToString());
return;
}
case "ColumnSpan":
{
//element.Style.SetProperty("grid-column-span", property.ValueOnInstance.ToString());
return;
}
case "Orientation":
{
element.Style.FlexDirection = property.ValueOnInstance.ToString() == "Vertical" ? "Row" : "Column";
return;
}
case "Text":
{
//When ctrl is a TextBox / TranslateTextBlock
element.TextContent = (property.ValueOnInstance ?? "").ToString();
return;
}
case "Stroke":
{
//When ctrl is a Rectangle
element.Style.BorderColor = ParseXamlColor(property.ValueOnInstance);
element.Style.BorderStyle = "solid";
return;
}
case "StrokeThickness":
{
//When ctrl is a Rectangle
element.Style.BorderWidth = property.ValueOnInstance.ToString() + "px";
element.Style.BorderStyle = "solid";
return;
}
case "Width":
{
element.Style.Width = property.ValueOnInstance.ToString() + "px";
return;
}
case "Height":
{
element.Style.Height = property.ValueOnInstance.ToString() + "px";
return;
}
case "Background":
case "Fill":
{
element.Style.Background = ParseXamlColor(property.ValueOnInstance);
return;
}
case "Margin":
{
element.Style.Left = ((Thickness)property.ValueOnInstance).Left.ToString() + "px";
element.Style.Top = ((Thickness)property.ValueOnInstance).Top.ToString() + "px";
return;
}
case "Left":
{
//if (property.ParentObject.ParentObject.Instance is Canvas)
//element.Style.Position = "absolute";
element.Style.Left = property.ValueOnInstance.ToString() + "px";
return;
}
case "Top":
{
//element.Style.Position = "absolute";
element.Style.Top = property.ValueOnInstance.ToString() + "px";
return;
}
case "FontSize":
{
element.Style.FontSize = property.ValueOnInstance.ToString() + "pt";
return;
}
case "FontWeight":
{
element.Style.FontWeight = property.ValueOnInstance.ToString();
return;
}
case "RenderTransform":
{
ParseTransform(element, property.ValueOnInstance as Transform);
return;
}
case "Opacity":
{
element.Style.Opacity = property.ValueOnInstance.ToString();
return;
}
case "Ignorable":
{
return;
}
default:
{
if (property.ValueOnInstance != null)
{
var nm = property.PropertyName[0].ToString().ToLower() + property.PropertyName.Substring(1);
nm = Regex.Replace(nm, @"(?<!_)([A-Z])", "-$1");
element.SetAttribute(nm, property.ValueOnInstance.ToString());
}
return;
}
}
}
}
}
