/// <summary>
/// Used to retrieve the object representation of the value of a CSS property if it has been explicitly set within this declaration block. This method returns null if the property is a shorthand property. Shorthand property values can only be accessed and modified as strings, using the getPropertyValue and setProperty methods.
/// </summary>
/// <param name="propertyName">The name of the CSS property. See the CSS property index.</param>
/// <returns>Returns the value of the property if it has been explicitly set for this declaration block. Returns null if the property has not been set.</returns>
public virtual ICssValue GetPropertyCssValue(string propertyName)
{
if (_styles.ContainsKey(propertyName))
{
CssStyleBlock scs = _styles[propertyName];
if (scs.CssValue == null)
{
scs.CssValue = CssValue.GetCssValue(scs.Value, ReadOnly);
}
return(scs.CssValue);
}
return(null);
}
/// <summary>
/// Used to remove a CSS property if it has been explicitly set within this declaration block.
/// </summary>
/// <param name="propertyName">The name of the CSS property. See the CSS property index.</param>
/// <returns>Returns the value of the property if it has been explicitly set for this declaration block.
/// Returns the empty string if the property has not been set or the property name does not correspond
/// to a known CSS property.</returns>
/// <exception cref="DomException">NO_MODIFICATION_ALLOWED_ERR: Raised if this declaration is readonly
/// or the property is readonly.</exception>
public string RemoveProperty(string propertyName)
{
if (_readOnly)
{
throw new DomException(DomExceptionType.NoModificationAllowedErr);
}
if (_styles.ContainsKey(propertyName))
{
CssStyleBlock s = _styles[propertyName];
_styles.Remove(propertyName);
return(s.Value);
}
return(string.Empty);
}
/// <summary>
/// Used to retrieve the object representation of the value of a CSS property if it has been explicitly set
/// within this declaration block. This method returns null if the property is a shorthand property.
/// Shorthand property values can only be accessed and modified as strings, using the getPropertyValue and
/// setProperty methods.
/// </summary>
/// <param name="propertyName">The name of the CSS property. See the CSS property index.</param>
/// <returns>Returns the value of the property if it has been explicitly set for this declaration block.
/// Returns null if the property has not been set.</returns>
public virtual ICssValue GetPropertyCssValue(string propertyName)
{
if (string.IsNullOrWhiteSpace(propertyName))
{
return(null);
}
if (_styles.ContainsKey(propertyName))
{
CssStyleBlock scs = _styles[propertyName];
if (propertyName.Equals(SvgConstants.AttrFontFamily, StringComparison.OrdinalIgnoreCase))
{
scs.CssValue = new CssValue(CssValueType.PrimitiveValue, scs.Value, ReadOnly);
}
else if (scs.CssValue == null)
{
scs.CssValue = CssValue.GetCssValue(scs.Value, ReadOnly);
}
return(scs.CssValue);
}
return(null);
}
public CssStyleBlock(CssStyleBlock style, int specificity, CssStyleSheetType origin)
: this(style.Name, style.Value, style.Priority, origin)
{
_specificity = specificity;
}
private string ParseString(string cssText)
{
bool startedWithABracket = false;
cssText = cssText.Trim();
if (cssText.StartsWith("{", StringComparison.OrdinalIgnoreCase))
{
cssText = cssText.Substring(1).Trim();
startedWithABracket = true;
}
Match match = _styleRegex.Match(cssText);
while (match.Success)
{
string name = match.Groups["name"].Value;
string value = match.Groups["value"].Value;
if (_parentRule != null)
{
value = ((CssRule)_parentRule).DeReplaceStrings(value);
}
string prio = match.Groups["priority"].Value;
CssStyleBlock style = new CssStyleBlock(name, value, prio, _origin);
bool addStyle = false;
if (_styles.ContainsKey(name))
{
string existingPrio = _styles[name].Priority;
if (existingPrio != "important" || prio == "important")
{
_styles.Remove(name);
addStyle = true;
}
}
else
{
addStyle = true;
}
if (addStyle)
{
_styles.Add(name, style);
}
cssText = cssText.Substring(match.Length).Trim();
match = _styleRegex.Match(cssText);
}
cssText = cssText.Trim();
if (cssText.StartsWith("}", StringComparison.OrdinalIgnoreCase))
{
cssText = cssText.Substring(1);
}
else if (startedWithABracket)
{
throw new DomException(DomExceptionType.SyntaxErr, "Style declaration ending bracket missing");
}
return(cssText);
}
private string parseString(string cssText)
{
bool startedWithABracket = false;
cssText = cssText.Trim();
if (cssText.StartsWith("{"))
{
cssText = cssText.Substring(1).Trim();
startedWithABracket = true;
}
Match match = styleRegex.Match(cssText);
while (match.Success)
{
string name = match.Groups["name"].Value;
string value = match.Groups["value"].Value;
if (_parentRule != null)
{
value = ((CssRule)_parentRule).DeReplaceStrings(value);
}
string prio = match.Groups["priority"].Value;
CssStyleBlock style = new CssStyleBlock(name, value, prio, _origin);
bool addStyle = false;
if (styles.ContainsKey(name))
{
string existingPrio = ((CssStyleBlock)styles[name]).Priority;
if (existingPrio != "important" || prio == "important")
{
styles.Remove(name);
addStyle = true;
}
}
else
{
addStyle = true;
}
if (addStyle)
{
styles.Add(name, style);
}
cssText = cssText.Substring(match.Length).Trim();
match = styleRegex.Match(cssText);
}
cssText = cssText.Trim();
if (cssText.StartsWith("}"))
{
cssText = cssText.Substring(1);
}
else if (startedWithABracket)
{
throw new DomException(DomExceptionType.SyntaxErr, "Style declaration ending bracket missing");
}
return cssText;
}
/// <summary>
/// Used to set a property value and priority within this declaration block
/// </summary>
/// <param name="propertyName">The name of the CSS property. See the CSS property index.</param>
/// <param name="value">The new value of the property.</param>
/// <param name="priority">The new priority of the property (e.g. "important").</param>
/// <exception cref="DomException">SYNTAX_ERR: Raised if the specified value has a syntax error and is unparsable.</exception>
/// <exception cref="DomException">NO_MODIFICATION_ALLOWED_ERR: Raised if this declaration is readonly or the property is readonly.</exception>
public void SetProperty(string propertyName, string value, string priority)
{
if (_readOnly)
throw new DomException(DomExceptionType.NoModificationAllowedErr);
styles[propertyName] = new CssStyleBlock(propertyName, value, priority, _origin);
}
private string ParseString(string cssText)
{
if (string.IsNullOrWhiteSpace(cssText))
{
return(string.Empty);
}
bool startedWithABracket = false;
cssText = cssText.Trim();
if (cssText.StartsWith("{", StringComparison.OrdinalIgnoreCase))
{
cssText = cssText.Substring(1).Trim();
startedWithABracket = true;
}
var quotes = new char[2] {
'\'', '"'
};
Match match = _styleRegex.Match(cssText);
while (match.Success)
{
string name = match.Groups["name"].Value.Trim();
string value = match.Groups["value"].Value.Trim();
if (_parentRule != null)
{
value = ((CssRule)_parentRule).DeReplaceStrings(value);
}
value = value.Trim(quotes);
if (value.StartsWith("url(", StringComparison.OrdinalIgnoreCase))
{
if (value.IndexOf("data:", StringComparison.OrdinalIgnoreCase) > 0)
{
var matchUrl = _reEmbeddedUrl.Match(cssText);
if (matchUrl != null && matchUrl.Groups != null && matchUrl.Groups.Count >= 3)
{
var nameUrl = matchUrl.Groups["name"].Value;
var mimeUrl = matchUrl.Groups["mime"].Value;
var encodingUrl = matchUrl.Groups["encoding"].Value;
var dataUrl = matchUrl.Groups["data"].Value;
if (string.Equals(name, nameUrl, StringComparison.Ordinal) &&
!string.IsNullOrWhiteSpace(mimeUrl) &&
!string.IsNullOrWhiteSpace(encodingUrl) &&
!string.IsNullOrWhiteSpace(dataUrl))
{
value = matchUrl.Groups[0].Value.Remove(0, name.Length + 1).TrimEnd(';');
match = matchUrl;
int foundAt = dataUrl.IndexOf(")", StringComparison.Ordinal);
if (!_styles.ContainsKey(UrlName) && foundAt > 0)
{
_styles.Add(UrlName, new CssStyleBlock(UrlName, nameUrl, string.Empty, _origin));
_styles.Add(UrlMime, new CssStyleBlock(UrlMime, mimeUrl, string.Empty, _origin));
_styles.Add(UrlData, new CssStyleBlock(UrlData, dataUrl.Substring(0, foundAt), string.Empty, _origin));
_styles.Add(UrlEncoding, new CssStyleBlock(UrlEncoding, encodingUrl, string.Empty, _origin));
}
}
}
}
}
string prio = match.Groups["priority"].Value;
CssStyleBlock style = new CssStyleBlock(name, value, prio, _origin);
bool addStyle = false;
if (_styles.ContainsKey(name))
{
string existingPrio = _styles[name].Priority;
if (existingPrio != "important" || prio == "important")
{
_styles.Remove(name);
addStyle = true;
}
}
else
{
addStyle = true;
}
if (addStyle)
{
_styles.Add(name, style);
}
cssText = cssText.Substring(match.Length).Trim();
match = _styleRegex.Match(cssText);
}
cssText = cssText.Trim();
if (cssText.StartsWith("}", StringComparison.OrdinalIgnoreCase))
{
cssText = cssText.Substring(1);
}
else if (startedWithABracket)
{
throw new DomException(DomExceptionType.SyntaxErr, "Style declaration ending bracket missing");
}
return(cssText);
}
internal CssStyleBlock(CssStyleBlock style, int specificity, CssStyleSheetType origin)
: this(style.Name, style.Value, style.Priority, origin)
{
Specificity = specificity;
}
private string ParseString(string cssText)
{
if (string.IsNullOrWhiteSpace(cssText))
{
return(string.Empty);
}
bool startedWithABracket = false;
cssText = cssText.Trim();
if (cssText.StartsWith("{", StringComparison.OrdinalIgnoreCase))
{
cssText = cssText.Substring(1).Trim();
startedWithABracket = true;
}
var quotes = new char[2] {
'\'', '"'
};
Match match = _styleRegex.Match(cssText);
while (match.Success)
{
string name = match.Groups["name"].Value.Trim();
string value = match.Groups["value"].Value.Trim();
if (_parentRule != null)
{
value = ((CssRule)_parentRule).DeReplaceStrings(value);
}
value = value.Trim(quotes);
if (value.StartsWith("url(", StringComparison.OrdinalIgnoreCase))
{
if (value.IndexOf("data:", StringComparison.OrdinalIgnoreCase) > 0)
{
var matchUrl = _reEmbeddedUrl.Match(cssText);
if (matchUrl != null && matchUrl.Groups != null && matchUrl.Groups.Count >= 3)
{
var nameUrl = matchUrl.Groups["name"].Value;
var mimeUrl = matchUrl.Groups["mime"].Value;
var encodingUrl = matchUrl.Groups["encoding"].Value;
var dataUrl = matchUrl.Groups["data"].Value;
if (string.Equals(name, nameUrl, StringComparison.Ordinal) &&
!string.IsNullOrWhiteSpace(mimeUrl) &&
!string.IsNullOrWhiteSpace(encodingUrl) &&
!string.IsNullOrWhiteSpace(dataUrl))
{
value = matchUrl.Groups[0].Value.Remove(0, name.Length + 1).TrimEnd(';');
match = matchUrl;
int foundAt = dataUrl.IndexOf(")", StringComparison.Ordinal);
if (!_styles.ContainsKey(UrlName) && foundAt > 0)
{
_styles.Add(UrlName, new CssStyleBlock(UrlName, nameUrl, string.Empty, _origin));
_styles.Add(UrlMime, new CssStyleBlock(UrlMime, mimeUrl, string.Empty, _origin));
_styles.Add(UrlData, new CssStyleBlock(UrlData, dataUrl.Substring(0, foundAt), string.Empty, _origin));
_styles.Add(UrlEncoding, new CssStyleBlock(UrlEncoding, encodingUrl, string.Empty, _origin));
}
}
}
}
}
else if (string.Equals(name, "font"))
{
var fontParts = new string[] {
"font", "font-style", "font-variant", "font-weight",
"font-size", "line-height", "font-family", "font-family", "font-stretch"
};
int count = 0;
// The font CSS shorthand property sets all the different properties of an element's font.
var matchFont = _reFont.Match(value);
if (!matchFont.Success)
{
var fontValue = value.Trim();
var indexSel = fontValue.IndexOf(' ');
if (indexSel > 0)
{
var preText = fontValue.Substring(0, indexSel).TrimStart();
fontValue = fontValue.Substring(indexSel).TrimStart();
var tempMatch = _reFontStretch.Match(preText);
if (tempMatch.Success)
{
var fontStretch = fontParts[8];
_styles.Add(fontStretch, new CssStyleBlock(fontStretch, tempMatch.Value, string.Empty, _origin));
}
else
{
tempMatch = _reFontWeight.Match(preText);
if (tempMatch.Success)
{
var fontWeight = fontParts[3];
_styles.Add(fontWeight, new CssStyleBlock(fontWeight, tempMatch.Value, string.Empty, _origin));
}
}
}
matchFont = _reFont.Match(fontValue);
}
if (matchFont.Success)
{
foreach (Group group in matchFont.Groups)
{
if (group.Success)
{
var fontPart = fontParts[count];
_styles.Add(fontPart, new CssStyleBlock(fontPart, group.Value, string.Empty, _origin));
}
count++;
}
}
}
string prio = match.Groups["priority"].Value;
CssStyleBlock style = new CssStyleBlock(name, value, prio, _origin);
bool addStyle = false;
if (_styles.ContainsKey(name))
{
string existingPrio = _styles[name].Priority;
if (existingPrio != "important" || prio == "important")
{
_styles.Remove(name);
addStyle = true;
}
}
else
{
addStyle = true;
}
if (addStyle)
{
_styles.Add(name, style);
}
cssText = cssText.Substring(match.Length).Trim();
match = _styleRegex.Match(cssText);
}
cssText = cssText.Trim();
if (cssText.StartsWith("}", StringComparison.OrdinalIgnoreCase))
{
cssText = cssText.Substring(1);
}
else if (startedWithABracket)
{
throw new DomException(DomExceptionType.SyntaxErr, "Style declaration ending bracket missing");
}
return(cssText);
}
