/// <summary>
/// Merge the specified style with this instance and optionally ovwerite any conflicting parameters
/// </summary>
/// <param name="style">Source.</param>
/// <param name="overwriteExisting">Overwrite existing.</param>
public void Merge(TextStyleParameters style, bool overwriteExisting)
{
Type t = typeof(TextStyleParameters);
var properties = t.GetRuntimeProperties().Where(prop => prop.CanRead && prop.CanWrite);
foreach (var prop in properties)
{
var sourceValue = prop.GetValue(style, null);
if (sourceValue != null)
{
var targetValue = prop.GetValue(this, null);
switch (prop.Name)
{
case "TextAlign":
if ((TextStyleAlign)sourceValue != TextStyleAlign.Left)
{
targetValue = null;
}
break;
case "TextDecoration":
if ((TextStyleDecoration)sourceValue != TextStyleDecoration.None)
{
targetValue = null;
}
break;
case "TextOverflow":
if ((TextStyleTextOverflow)sourceValue != TextStyleTextOverflow.None)
{
targetValue = null;
}
break;
case "TextTransform":
if ((TextStyleTextTransform)sourceValue != TextStyleTextTransform.None)
{
targetValue = null;
}
break;
}
if (targetValue != null && !overwriteExisting)
{
continue;
}
prop.SetValue(this, sourceValue, null);
}
}
}
/// <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;
case "TextStyleFontStyle":
curStyle.FontStyle = EnumUtils.FromDescription <TextStyleFontStyle> (cleanedValue);
break;
case "TextStyleFontWeight":
curStyle.FontWeight = EnumUtils.FromDescription <TextStyleFontWeight> (cleanedValue);
break;
default:
throw new InvalidCastException("Could not find the appropriate type " + prop.PropertyType.Name);
}
}
}
}
/// <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 + "{");
string cast;
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":
cast = Convert.ToString(value);
if (cast != "None")
{
parsedValue = cast.ToLower();
}
break;
case "TextStyleFontStyle":
case "TextStyleFontWeight":
cast = Convert.ToString(value);
if (cast != "Normal")
{
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());
}
