/// <summary>
/// Raises the <see cref="E:RemovingStyle" /> event.
/// </summary>
/// <param name="e">The <see cref="RemovingStyleEventArgs"/> instance containing the event data.</param>
protected virtual void OnRemovingStyle(RemovingStyleEventArgs e)
{
if (RemovingStyle != null)
{
RemovingStyle(this, e);
}
}
/// <summary>
/// Sanitizes the style.
/// </summary>
/// <param name="styles">The styles.</param>
/// <param name="baseUrl">The base URL.</param>
protected void SanitizeStyle(CsQuery.Implementation.CSSStyleDeclaration styles, string baseUrl)
{
if (styles == null || !styles.Any())
{
return;
}
var removeStyles = new List <KeyValuePair <string, string> >();
var setStyles = new Dictionary <string, string>();
foreach (var style in styles)
{
var key = DecodeCss(style.Key);
var val = DecodeCss(style.Value);
if (!AllowedCssPropertiesSet.Contains(key) || CssExpression.IsMatch(val) || DisallowCssPropertyValue.IsMatch(val))
{
removeStyles.Add(style);
}
else
{
var urls = CssUrl.Matches(val);
if (urls.Count > 0)
{
if (urls.Cast <Match>().Any(m => GetSafeUri(m.Groups[1].Value) == null))
{
removeStyles.Add(style);
}
else
{
var s = CssUrl.Replace(val, m => "url(" + SanitizeUrl(m.Groups[1].Value, baseUrl));
if (s != val)
{
if (key != style.Key)
{
removeStyles.Add(style);
}
setStyles[key] = s;
}
}
}
}
}
foreach (var style in removeStyles)
{
var e = new RemovingStyleEventArgs {
Style = style
};
OnRemovingStyle(e);
if (!e.Cancel)
{
styles.RemoveStyle(style.Key);
}
}
foreach (var kvp in setStyles)
{
styles.SetStyle(kvp.Key, kvp.Value);
}
}
/// <summary>
/// Sanitizes the style.
/// </summary>
/// <param name="styles">The styles.</param>
/// <param name="baseUrl">The base URL.</param>
protected void SanitizeStyle(CsQuery.Implementation.CSSStyleDeclaration styles, string baseUrl)
{
if (styles == null || !styles.Any()) return;
var removeStyles = new List<KeyValuePair<string, string>>();
var setStyles = new Dictionary<string, string>();
foreach (var style in styles)
{
var key = DecodeCss(style.Key);
var val = DecodeCss(style.Value);
if (!AllowedCssPropertiesSet.Contains(key) || CssExpression.IsMatch(val) || DisallowCssPropertyValue.IsMatch(val))
removeStyles.Add(style);
else
{
var urls = CssUrl.Matches(val);
if (urls.Count > 0)
{
if (urls.Cast<Match>().Any(m => GetSafeUri(m.Groups[1].Value) == null))
removeStyles.Add(style);
else
{
var s = CssUrl.Replace(val, m => "url(" + SanitizeUrl(m.Groups[1].Value, baseUrl));
if (s != val)
{
if (key != style.Key) removeStyles.Add(style);
setStyles[key] = s;
}
}
}
}
}
foreach (var style in removeStyles)
{
var e = new RemovingStyleEventArgs { Style = style };
OnRemovingStyle(e);
if (!e.Cancel) styles.RemoveStyle(style.Key);
}
foreach (var kvp in setStyles)
{
styles.SetStyle(kvp.Key, kvp.Value);
}
}
/// <summary>
/// Raises the <see cref="E:RemovingStyle" /> event.
/// </summary>
/// <param name="e">The <see cref="RemovingStyleEventArgs"/> instance containing the event data.</param>
protected virtual void OnRemovingStyle(RemovingStyleEventArgs e)
{
if (RemovingStyle != null) RemovingStyle(this, e);
}
