/// <summary>
/// Splits the text into words and saves the result
/// </summary>
public static void ParseToWords(CssBox owner, List <CssBoxWord> words, string text)
{
words.Clear();
int startIdx = 0;
while (startIdx < text.Length)
{
while (startIdx < text.Length && char.IsWhiteSpace(text[startIdx]))
{
startIdx++;
}
var endIdx = startIdx + 1;
while (endIdx < text.Length && !char.IsWhiteSpace(text[endIdx]))
{
endIdx++;
}
if (startIdx < text.Length)
{
var hasSpaceBefore = startIdx > 0 && char.IsWhiteSpace(text[startIdx - 1]);
var hasSpaceAfter = endIdx < text.Length && char.IsWhiteSpace(text[endIdx]);
var word = HtmlUtils.DecodeHtml(text.Substring(startIdx, endIdx - startIdx));
words.Add(new CssBoxWord(owner, word, hasSpaceBefore, hasSpaceAfter));
}
startIdx = endIdx + 1;
}
}
/// <summary>
/// Extract html tag attributes from the given sub-string.
/// </summary>
/// <param name="source">the html source to parse</param>
/// <param name="idx">the start index of the tag attributes in the source</param>
/// <param name="length">the length of the tag attributes from the start index in the source</param>
/// <param name="attributes">return the dictionary of tag attributes</param>
private static void ExtractAttributes(string source, int idx, int length, out Dictionary <string, string> attributes)
{
attributes = null;
int startIdx = idx;
while (startIdx < idx + length)
{
while (startIdx < idx + length && char.IsWhiteSpace(source, startIdx))
{
startIdx++;
}
var endIdx = startIdx + 1;
while (endIdx < idx + length && !char.IsWhiteSpace(source, endIdx) && source[endIdx] != '=')
{
endIdx++;
}
if (startIdx < idx + length)
{
var key = source.Substring(startIdx, endIdx - startIdx);
startIdx = endIdx + 1;
while (startIdx < idx + length && (char.IsWhiteSpace(source, startIdx) || source[startIdx] == '='))
{
startIdx++;
}
bool hasPChar = false;
char pChar = source[startIdx];
if (pChar == '"' || pChar == '\'')
{
hasPChar = true;
startIdx++;
}
endIdx = startIdx + (hasPChar ? 0 : 1);
while (endIdx < idx + length && (hasPChar ? source[endIdx] != pChar : !char.IsWhiteSpace(source, endIdx)))
{
endIdx++;
}
var value = source.Substring(startIdx, endIdx - startIdx);
value = HtmlUtils.DecodeHtml(value);
if (!string.IsNullOrEmpty(key) && !string.IsNullOrEmpty(value))
{
if (attributes == null)
{
attributes = new Dictionary <string, string>(StringComparer.InvariantCultureIgnoreCase);
}
attributes[key.ToLower()] = value;
}
startIdx = endIdx + (hasPChar ? 2 : 1);
}
}
}
