/// <summary>
/// Raises the <see cref="ImageParsed"/> event.
/// </summary>
/// <param name="e">The event data. </param>
protected void OnImageParsed(ImageEventArgs e)
{
if (ImageParsed != null)
{
ImageParsed(this, e);
}
}
/// <summary>
/// Adds the attachments folder as a prefix to all image URLs before the HTML <img> tag is written.
/// </summary>
private void ImageParsed(object sender, ImageEventArgs e)
{
if (!e.OriginalSrc.StartsWith("http://") && !e.OriginalSrc.StartsWith("https://") && !e.OriginalSrc.StartsWith("www."))
{
string src = e.OriginalSrc;
src = _imgFileRegex.Replace(src, "");
string attachmentsPath = _applicationSettings.AttachmentsUrlPath;
string urlPath = attachmentsPath + (src.StartsWith("/") ? "" : "/") + src;
e.Src = UrlResolver.ConvertToAbsolutePath(urlPath);
}
}
private void FixLinks(MarkdownDocument document)
{
foreach (var item in document.Descendants().OfType <LinkInline>())
{
LinkInline link = (LinkInline)item;
if (item.IsImage)
{
ImageEventArgs args = new ImageEventArgs(link.Url, link.Url, link.Label, link.Label);
ImageParsed?.Invoke(this, args);
link.Url = args.Src;
}
else
{
LinkEventArgs args = new LinkEventArgs(link.Url, link.Url, link.Label, "");
LinkParsed?.Invoke(this, args);
link.Url = args.Href;
}
}
}
/// <summary>
/// Raises the <see cref="ImageParsed"/> event.
/// </summary>
/// <param name="e">The event data. </param>
protected void OnImageParsed(ImageEventArgs e)
{
if (ImageParsed != null)
ImageParsed(this, e);
}
/// <summary>
/// Process image creole into <img> </img>
/// </summary>
/// <param name="markup"></param>
/// <returns></returns>
protected virtual string _processImageCreole(string markup)
{
int sanityCheckMax = 5000;
int sanityCheckCount = 0;
int iPos = _indexOfWithSkip(markup, "{{", 0);
while (iPos >= 0)
{
if (++sanityCheckCount > sanityCheckMax)
break;
int iEnd = _indexOfWithSkip(markup, "}}", iPos);
if (iEnd > iPos)
{
iPos += 2;
string innards = markup.Substring(iPos, iEnd - iPos);
string href = innards;
string text = href;
ImageEventArgs.HorizontalAlignment align = ImageEventArgs.HorizontalAlignment.None;
string[] splits = innards.Split('|');
if (innards.Count(x => x == '|') > 1)
{
if (Enum.TryParse(splits[1], true, out align) == false)
align = ImageEventArgs.HorizontalAlignment.None;
}
if (splits.Count() > 0)
{
href = splits.First();
text = _processCreoleFragment(splits.Last());
}
ImageEventArgs args = new ImageEventArgs(href, href, text, text, align);
OnImageParsed(args);
string imageHtml = String.Format("<img src=\"{0}\" alt=\"{1}\" title=\"{2}\" border=\"0\" />", args.Src, args.Alt, args.Title);
string divHtml = "<div class=\"{0}\">{1}</div>";
string imageFrameContent = imageHtml;
if (!args.Src.EndsWith(args.Alt))
imageFrameContent += String.Format(divHtml, "caption", args.Alt);
string imageFrame = String.Format(divHtml, "image_frame", imageFrameContent);
string replacement = markup.Substring(0, iPos - 2);
switch (align)
{
case ImageEventArgs.HorizontalAlignment.Left:
replacement += String.Format(divHtml, "floatleft", imageFrame);
break;
case ImageEventArgs.HorizontalAlignment.Right:
replacement += String.Format(divHtml, "floatright", imageFrame);
break;
case ImageEventArgs.HorizontalAlignment.Center:
replacement += String.Format(divHtml, "center", String.Format(divHtml, "floatnone", imageFrame));
break;
default:
replacement += String.Format(divHtml, "floatnone", imageFrame);
break;
}
replacement += markup.Substring(iEnd + 2);
markup = replacement;
}
else
{
break;
}
iPos = _indexOfWithSkip(markup, "{{", iPos);
}
return markup;
}
private string ImageReferenceEvaluator(Match match)
{
string wholeMatch = match.Groups[1].Value;
string altText = match.Groups[2].Value;
string linkID = match.Groups[3].Value.ToLowerInvariant();
string result;
// for shortcut links like ![this][].
if (linkID == "")
linkID = altText.ToLowerInvariant();
altText = altText.Replace("\"", """);
if (_urls.ContainsKey(linkID))
{
string url = _urls[linkID];
url = EncodeProblemUrlChars(url);
url = EscapeBoldItalic(url);
ImageEventArgs args = new ImageEventArgs(url, url, altText, "");
OnImageParsed(args);
result = string.Format("<img src=\"{0}\" border=\"0\" alt=\"{1}\"", args.Src, args.Alt);
if (_titles.ContainsKey(linkID))
{
string title = _titles[linkID];
title = EscapeBoldItalic(title);
result += string.Format(" title=\"{0}\"", title);
}
result += _emptyElementSuffix;
}
else
{
// If there's no such link ID, leave intact:
result = wholeMatch;
}
return result;
}
private string ImageInlineEvaluator(Match match)
{
string alt = match.Groups[2].Value;
string url = match.Groups[3].Value;
string title = match.Groups[6].Value;
string width = match.Groups[9].Value == String.Empty ? String.Empty : String.Format("{0}px", match.Groups[9].Value);
string height = match.Groups[10].Value == String.Empty ? String.Empty : String.Format("{0}px", match.Groups[10].Value);
string result;
alt = alt.Replace("\"", """);
title = title.Replace("\"", """);
if (url.StartsWith("<") && url.EndsWith(">"))
url = url.Substring(1, url.Length - 2); // Remove <>'s surrounding URL, if present
url = EncodeProblemUrlChars(url);
url = EscapeBoldItalic(url);
ImageEventArgs args = new ImageEventArgs(url, url, alt, "");
OnImageParsed(args);
result = string.Format("<img src=\"{0}\" border=\"0\" alt=\"{1}\" width=\"{2}\" height=\"{3}\"", args.Src, args.Alt, width, height);
if (!String.IsNullOrEmpty(title))
{
title = EscapeBoldItalic(title);
result += string.Format(" title=\"{0}\"", title);
}
result += _emptyElementSuffix;
return result;
}
/// <summary>
/// Adds the attachments folder as a prefix to all image URLs before the HTML <img> tag is written.
/// </summary>
private void ImageParsed(object sender, ImageEventArgs e)
{
if (!e.OriginalSrc.StartsWith("http://") && !e.OriginalSrc.StartsWith("https://") && !e.OriginalSrc.StartsWith("www."))
{
string src = e.OriginalSrc;
src = _imgFileRegex.Replace(src, "");
string attachmentsPath = _applicationSettings.AttachmentsUrlPath;
string urlPath = attachmentsPath + (src.StartsWith("/") ? "" : "/") + src;
e.Src = UrlResolver.ConvertToAbsolutePath(urlPath);
}
}
/// <summary>
/// Process image creole into <img> </img>
/// </summary>
/// <param name="markup"></param>
/// <returns></returns>
protected virtual string _processImageCreole(string markup)
{
int sanityCheckMax = 5000;
int sanityCheckCount = 0;
int iPos = _indexOfWithSkip(markup, "{{", 0);
while (iPos >= 0)
{
if (++sanityCheckCount > sanityCheckMax)
{
break;
}
int iEnd = _indexOfWithSkip(markup, "}}", iPos);
if (iEnd > iPos)
{
iPos += 2;
string innards = markup.Substring(iPos, iEnd - iPos);
string href = innards;
string text = href;
ImageEventArgs.HorizontalAlignment align = ImageEventArgs.HorizontalAlignment.None;
string[] splits = innards.Split('|');
if (innards.Count(x => x == '|') > 1)
{
if (Enum.TryParse(splits[1], true, out align) == false)
{
align = ImageEventArgs.HorizontalAlignment.None;
}
}
if (splits.Count() > 0)
{
href = splits.First();
text = _processCreoleFragment(splits.Last());
}
ImageEventArgs args = new ImageEventArgs(href, href, text, text, align);
OnImageParsed(args);
string imageHtml = String.Format("<img src=\"{0}\" alt=\"{1}\" title=\"{2}\" border=\"0\" />", args.Src, args.Alt, args.Title);
string divHtml = "<div class=\"{0}\">{1}</div>";
string imageFrameContent = imageHtml;
if (!args.Src.EndsWith(args.Alt))
{
imageFrameContent += String.Format(divHtml, "caption", args.Alt);
}
string imageFrame = String.Format(divHtml, "image_frame", imageFrameContent);
string replacement = markup.Substring(0, iPos - 2);
switch (align)
{
case ImageEventArgs.HorizontalAlignment.Left:
replacement += String.Format(divHtml, "floatleft", imageFrame);
break;
case ImageEventArgs.HorizontalAlignment.Right:
replacement += String.Format(divHtml, "floatright", imageFrame);
break;
case ImageEventArgs.HorizontalAlignment.Center:
replacement += String.Format(divHtml, "center", String.Format(divHtml, "floatnone", imageFrame));
break;
default:
replacement += String.Format(divHtml, "floatnone", imageFrame);
break;
}
replacement += markup.Substring(iEnd + 2);
markup = replacement;
}
else
{
break;
}
iPos = _indexOfWithSkip(markup, "{{", iPos);
}
return(markup);
}
