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Optimizing Bbcode filter

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--HG--
branch : 1.x
This commit is contained in:
Sebastien Ros
2012-08-09 18:14:19 -07:00
parent bcd9628a24
commit 4630269e60
2 changed files with 93 additions and 23 deletions
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1
src/Orchard.Core.Tests/Orchard.Core.Tests.csproj
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@@ -107,6 +107,7 @@
</Reference>
</ItemGroup>
<ItemGroup>
<Compile Include="Common\BbcodeFilterTests.cs" />
<Compile Include="Common\Providers\CommonPartProviderTests.cs" />
<Compile Include="Body\BodyPartTests.cs" />
<Compile Include="Feeds\Controllers\FeedControllerTests.cs" />

115
src/Orchard.Web/Core/Common/Services/BbcodeFilter.cs
View File

@@ -1,4 +1,7 @@
using System.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
using Orchard.Services;
@@ -14,31 +17,97 @@ namespace Orchard.Core.Common.Services {
if (string.IsNullOrEmpty(text))
return string.Empty;
var urlRegex = new Regex(@"\[url\]([^\]]+)\[\/url\]");
var urlRegexWithLink = new Regex(@"\[url=([^\]]+)\]([^\]]+)\[\/url\]");
var imgRegex = new Regex(@"\[img\]([^\]]+)\[\/img\]");
text = urlRegex.Replace(text, "<a href=\"$1\">$1</a>");
text = urlRegexWithLink.Replace(text, "<a href=\"$1\">$2</a>");
var matches = imgRegex.Matches(text).OfType<Match>().OrderByDescending(m => m.Groups[0].Index);
foreach(var match in matches) {
var index = match.Groups[0].Index;
var length = match.Groups[0].Length;
var url = match.Groups[1].Value.Trim();
if (!string.IsNullOrEmpty(url)) {
if (url[0]=='~')
url = VirtualPathUtility.ToAbsolute(url);
text =
text.Substring(0, index) +
string.Format("<img src=\"{0}\" />", url) +
text.Substring(index + length);
}
// optimize code path if nothing to do
if (!text.Contains("[url]") && !text.Contains("[img]") && !text.Contains("[url=")) {
return text;
}
text = imgRegex.Replace(text, "<img src=\"$1\" />");
var sb = new StringBuilder(text);
return text;
var index = -1;
var allIndexes = new List<int>();
// process all [url]
while (-1 != (index = text.IndexOf("[url]", index + 1, StringComparison.Ordinal))) {
allIndexes.Add(index);
}
foreach(var start in allIndexes) {
var end = text.IndexOf("[/url]", start, StringComparison.Ordinal);
var url = text.Substring(start + 5 , end - start - 5);
// substitue [url] by <a>
sb.Remove(start, end - start + 6);
sb.Insert(start, String.Format("<a href=\"{0}\">{0}</a>", url));
}
// [url={url}]
index = -1;
allIndexes.Clear();
while (-1 != (index = text.IndexOf("[url=", index + 1, StringComparison.Ordinal))) {
allIndexes.Add(index);
}
foreach (var start in allIndexes) {
var urlEnd = text.IndexOf("]", start, StringComparison.Ordinal);
var end = text.IndexOf("[/url]", start, StringComparison.Ordinal);
var url = text.Substring(start + 5, urlEnd - start - 5);
var title = text.Substring(urlEnd + 1, end - urlEnd - 1);
// substitue [url] by <a>
sb.Remove(start, end - start + 6);
sb.Insert(start, String.Format("<a href=\"{0}\">{1}</a>", url, title));
}
// [img]
index = -1;
allIndexes.Clear();
while (-1 != (index = text.IndexOf("[img]", index + 1, StringComparison.Ordinal))) {
allIndexes.Add(index);
}
foreach (var start in allIndexes) {
var end = text.IndexOf("[/img]", start, StringComparison.Ordinal);
var url = text.Substring(start + 5, end - start - 5);
// substitue [url] by <a>
sb.Remove(start, end - start + 6);
if (!string.IsNullOrEmpty(url)) {
if (url[0] == '~')
url = VirtualPathUtility.ToAbsolute(url);
}
sb.Insert(start, String.Format("<img src=\"{0}\" />", url));
}
//var urlRegex = new Regex(@"\[url\]([^\]]+)\[\/url\]");
//var urlRegexWithLink = new Regex(@"\[url=([^\]]+)\]([^\]]+)\[\/url\]");
//var imgRegex = new Regex(@"\[img\]([^\]]+)\[\/img\]");
//text = urlRegex.Replace(text, "<a href=\"$1\">$1</a>");
//text = urlRegexWithLink.Replace(text, "<a href=\"$1\">$2</a>");
//var matches = imgRegex.Matches(text).OfType<Match>().OrderByDescending(m => m.Groups[0].Index);
//foreach(var match in matches) {
// var index2 = match.Groups[0].Index;
// var length = match.Groups[0].Length;
// var url = match.Groups[1].Value.Trim();
// if (!string.IsNullOrEmpty(url)) {
// if (url[0]=='~')
// url = VirtualPathUtility.ToAbsolute(url);
// text =
// text.Substring(0, index2) +
// string.Format("<img src=\"{0}\" />", url) +
// text.Substring(index2 + length);
// }
//}
//text = imgRegex.Replace(text, "<img src=\"$1\" />");
return sb.ToString();
}
}
}