/// <summary>
/// Adds a querystring to all image tags with width and height so that MImageResizer resizes them on request
/// </summary>
/// <param name="json">Layout builder json</param>
/// <returns>Layout builder json</returns>
public static string ResizeImages(string json)
{
ContainersSerialiser containerSerialiser = new ContainersSerialiser();
List<Container> containers = containerSerialiser.DeserialiseContainers(json);
List<WysiwygBlock> wysiwygBlocks = (from c in containers
from b in c.Blocks
where b is WysiwygBlock
select b as WysiwygBlock).ToList();
foreach (WysiwygBlock block in wysiwygBlocks)
{
int offset = 0;
//match 1 = src, match 2 = width, match 3 = height - explaination eof
string imgRegex =
@"(?i)<img\s(?=[^>]*src=""([^""]*)"")(?=[^>]*width=""([^""]*)"")(?=[^>]*height=""([^""]*)"")[^>]*>";
block.Content = HttpUtility.HtmlDecode(HttpUtility.UrlDecode(block.Content));
MatchCollection mc = Regex.Matches(block.Content, imgRegex, RegexOptions.IgnoreCase | RegexOptions.IgnorePatternWhitespace | RegexOptions.Multiline);
foreach (Match match in mc)
{
string newUrl = string.Format("{0}?width={1}&height={2}&mode=crop",
match.Groups[1].Value.Split('?').First(), match.Groups[2].Value, match.Groups[3].Value);
string newSrc = block.Content.Substring(0, match.Groups[1].Index + offset);
newSrc += newUrl;
int urlEndIndex = (match.Groups[1].Index + offset) + match.Groups[1].Length;
newSrc += block.Content.Substring(urlEndIndex, block.Content.Length - urlEndIndex);
block.Content = newSrc;
offset += newUrl.Length - match.Groups[1].Value.Length;
}
block.Content = HttpUtility.HtmlEncode(HttpUtility.UrlEncode(block.Content));
}
return containerSerialiser.SerialiseContainers(containers);
}
/// <summary>
/// Deserialises the saved builder content
/// </summary>
/// <param name="json"></param>
protected void DeserialiseContainers(string json)
{
ContainersSerialiser serialiser = new ContainersSerialiser();
Containers = serialiser.DeserialiseContainers(json);
ContainersLoaded = true;
}
/// <summary>
/// Deserialises the saved builder content
/// </summary>
/// <param name="json"></param>
protected List<Container> DeserialiseContainers(string json)
{
var serialiser = new ContainersSerialiser();
return serialiser.DeserialiseContainers(json);
}