/// <summary>
/// Parses to CSS string.
/// </summary>
/// <returns>The to CSS string.</returns>
/// <param name="tagName">Tag name.</param>
/// <param name="style">Style.</param>
public static string ParseToCSSString(string tagName, TextStyleParameters style)
{
var builder = new StringBuilder ();
builder.Append (tagName + "{");
var runtimeProperties = style.GetType ().GetRuntimeProperties ();
foreach (var prop in runtimeProperties) {
try {
var value = prop.GetValue (style);
if (value != null) {
string parsedValue = null;
switch (prop.PropertyType.Name) {
case "String":
if ((value as string).StartsWith ("#"))
parsedValue = (string)value;
else
parsedValue = "'" + value + "'";
break;
case "Single":
if (Convert.ToSingle (value) > float.MinValue) {
parsedValue = Convert.ToString (value);
if (prop.Name == "FontSize") // Dirty, I really need a list of things that can be set in pixel values
parsedValue += "px";
}
break;
case "Int32":
if (Convert.ToInt32 (value) > int.MinValue)
parsedValue = Convert.ToString (value);
break;
case "Single[]":
parsedValue = Convert.ToString (value);
break;
case "TextStyleAlign":
case "TextStyleDecoration":
case "TextStyleTextTransform":
case "TextStyleTextOverflow":
var cast = Convert.ToString (value);
if (cast != "None")
parsedValue = cast.ToLower ();
break;
default:
throw new InvalidCastException ("Could not find the appropriate type " + prop.PropertyType.Name);
}
var attributes = (CssAttribute[])prop.GetCustomAttributes (
typeof(CssAttribute), false);
if (attributes.Length > 0 && parsedValue != null)
builder.Append (attributes [0].Name + ":" + parsedValue + ";");
}
} catch (Exception ex) {
throw ex;
}
}
builder.Append ("}");
return builder.ToString ();
}
/// <summary>
/// Merges a css rule.
/// </summary>
/// <returns>The rule.</returns>
/// <param name="curStyle">Target TextStyleParameters</param>
/// <param name="css">Css value</param>
/// <param name="clone">If set to <c>true</c> clone the style</param>
public static TextStyleParameters MergeRule(TextStyleParameters curStyle, string css, bool clone)
{
var parser = new CssParser ();
var rules = parser.ParseAll (css);
if (rules.Count () != 1) {
throw new NotSupportedException ("Only a single css class may be merged at a time");
}
var mergedStyle = clone ? curStyle.Clone () : curStyle;
var rule = rules.FirstOrDefault ();
if (rule != null) {
ParseCSSRule (ref mergedStyle, rule);
}
return mergedStyle;
}
/// <summary>
/// Parses the specified CSS
/// </summary>
/// <param name="css">Css.</param>
public static Dictionary<string, TextStyleParameters> Parse(string css)
{
var parser = new CssParser ();
var rules = parser.ParseAll (css);
var textStyles = new Dictionary<string, TextStyleParameters> ();
foreach (var rule in rules) {
foreach (var selector in rule.Selectors) {
// If it doesnt exist, create it
if (!textStyles.ContainsKey (selector))
textStyles [selector] = new TextStyleParameters (selector);
var curStyle = textStyles [selector];
ParseCSSRule (ref curStyle, rule);
}
}
return textStyles;
}
/// <summary>
/// Parses the CSS rule.
/// </summary>
/// <param name="curStyle">Current style.</param>
/// <param name="rule">Rule.</param>
internal static void ParseCSSRule(ref TextStyleParameters curStyle, CssParserRule rule)
{
foreach (var declaration in rule.Declarations) {
if (_textStyleProperties.ContainsKey (declaration.Property)) {
var cleanedValue = declaration.Value.Replace ("\"", "");
cleanedValue = cleanedValue.Trim ();
var prop = _textStyleProperties [declaration.Property];
switch (prop.PropertyType.Name) {
case "String":
curStyle.SetValue (prop.Name, cleanedValue);
break;
case "Int32":
int numInt;
if (int.TryParse (cleanedValue, out numInt)) {
curStyle.SetValue (prop.Name, numInt);
}
break;
case "Single":
cleanedValue = cleanedValue.Replace ("px", "");
float numFloat;
if (float.TryParse (cleanedValue, out numFloat)) {
curStyle.SetValue (prop.Name, numFloat);
} else
throw new Exception ("Failed to Parse Single value " + cleanedValue);
break;
case "Single[]":
var parts = cleanedValue.Split (new char[]{ ' ', ',' }, StringSplitOptions.RemoveEmptyEntries);
var parsedValues = new float[parts.Length];
for (int i = 0; i < parts.Length; i++) {
float numArrayFloat;
if (float.TryParse (parts [i], out numArrayFloat)) {
parsedValues [i] = numArrayFloat;
}
}
curStyle.SetValue (prop.Name, parsedValues);
break;
case "TextStyleAlign":
curStyle.TextAlign = EnumUtils.FromDescription<TextStyleAlign> (cleanedValue);
break;
case "TextStyleDecoration":
curStyle.TextDecoration = EnumUtils.FromDescription<TextStyleDecoration> (cleanedValue);
break;
case "TextStyleTextTransform":
curStyle.TextTransform = EnumUtils.FromDescription<TextStyleTextTransform> (cleanedValue);
break;
case "TextStyleTextOverflow":
curStyle.TextOverflow = EnumUtils.FromDescription<TextStyleTextOverflow> (cleanedValue);
break;
default:
throw new InvalidCastException ("Could not find the appropriate type " + prop.PropertyType.Name);
}
}
}
}
