/// <summary>
/// バックグラウンドでの処理を行います。
/// フィードの更新処理を行います。
/// 設定パラメータは Hashtable で指定します。
/// Hashtable["Url"] ... フィードのURLを指定します。指定がない場合、全フィードの更新を行います。
/// Hashtable["ExpandAll"] ... true の場合、読み込み後に全ツリーノードを開きます。
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void backgroundWorkerUpdateFeed_DoWork(object sender, DoWorkEventArgs e)
{
var worker = (BackgroundWorker)sender;
worker.ReportProgress(0);
Hashtable args = (Hashtable)e.Argument;
if (args == null)
{
args = new Hashtable();
}
Feed.FeedReader feedReader = new Feed.FeedReader();
if (args.ContainsKey("Url"))
{
Uri uri = new Uri((string)args["Url"]);
Feed.FeedInfo info = feedReader.Read(uri, settingsManager.Setting.DummyUserAgent);
if (null == info)
{
args["Error"] = true;
}
else
{
if (false == this.feedTreeManager.UpdateFeed(info))
{
args["Error"] = true;
}
}
}
else
{
foreach (var url in settingsManager.Setting.FeedUrls)
{
var uri = new Uri(url);
var feed = feedReader.Read(uri, settingsManager.Setting.DummyUserAgent);
this.feedTreeManager.UpdateFeed(feed);
}
}
e.Result = args;
}
/// <summary>
/// フィードをツリーに追加、または既にあるノードを更新します。
/// このメソッドは、バックグラウンドワーカーから呼び出されるため、UIの操作は避けています。
/// </summary>
/// <param name="feedInfo">追加、または更新するフィード</param>
/// <returns></returns>
public bool UpdateFeed(Feed.FeedInfo feedInfo)
{
if (null == feedInfo)
{
return(false);
}
FeedTreeNode parentNode = null;
foreach (var node in this.parentNodeList)
{
if (node.Url.ToString() == feedInfo.Url.ToString())
{
parentNode = node;
break;
}
}
if (null == parentNode)
{
parentNode = new FeedTreeNode();
this.parentNodeList.Add(parentNode);
}
parentNode.Title = feedInfo.Title;
parentNode.Description = feedInfo.Description;
parentNode.Url = feedInfo.Url;
parentNode.ToolTipText = feedInfo.Description;
parentNode.IconIndex = GetFaviconIndex(feedInfo.Url);
List <FeedTreeNode> childList;
if (false == this.childNodeList.TryGetValue(parentNode, out childList))
{
this.childNodeList.Add(parentNode, new List <FeedTreeNode>());
}
foreach (var item in feedInfo.Items)
{
FeedTreeNode childNode = null;
foreach (FeedTreeNode child in this.childNodeList[parentNode])
{
if (child.Url.ToString() == item.Link.ToString())
{
childNode = child;
break;
}
}
if (null == childNode)
{
childNode = new FeedTreeNode();
this.childNodeList[parentNode].Add(childNode);
}
childNode.Title = item.Title;
childNode.Content = item.Content;
childNode.Summary = item.Summary;
childNode.Url = item.Link;
childNode.Date = item.Date;
childNode.IconIndex = GetFaviconIndex(item.Link);
}
return(true);
}
/// <summary>
/// RSS 1.0の読み込みを行います。
/// </summary>
/// <param name="uri">フィードのURL</param>
/// <returns>フィード</returns>
private FeedInfo ReadRSS1(Uri uri)
{
FeedInfo info = new FeedInfo();
info.Url = uri;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(uri.ToString());
List<FeedItem> ret = new List<FeedItem>();
XmlNamespaceManager nsmgr = new XmlNamespaceManager(xmlDoc.NameTable);
nsmgr.AddNamespace("rss", "http://purl.org/rss/1.0/");
nsmgr.AddNamespace("content", "http://purl.org/rss/1.0/modules/content/");
nsmgr.AddNamespace("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
nsmgr.AddNamespace("dc", "http://purl.org/dc/elements/1.1/");
XmlNodeList linodes = xmlDoc.SelectNodes("/rdf:RDF/rss:channel/rss:items/rdf:Seq/rdf:li", nsmgr);
foreach (XmlNode node in linodes)
{
string strResource = node.Attributes["resource", "http://www.w3.org/1999/02/22-rdf-syntax-ns#"].Value;
XmlNode aboutItem = xmlDoc.SelectSingleNode("/rdf:RDF/rss:item[@rdf:about='" + strResource + "']", nsmgr);
if (aboutItem != null)
{
XmlNode titleNode = aboutItem.SelectSingleNode("rss:title", nsmgr);
XmlNode contentNode = aboutItem.SelectSingleNode("content:encoded", nsmgr);
XmlNode linkUrkNode = aboutItem.SelectSingleNode("rss:link", nsmgr);
XmlNode dateNode = aboutItem.SelectSingleNode("dc:date", nsmgr);
string title = string.Empty;
string content = string.Empty;
string link = string.Empty;
string date = string.Empty;
if (titleNode != null)
{
title = titleNode.InnerText;
}
if (linkUrkNode != null)
{
link = linkUrkNode.InnerText;
}
if (contentNode != null)
{
content = contentNode.InnerText;
}
if (dateNode != null)
{
date = dateNode.InnerText;
}
FeedItem rssItem = new FeedItem();
rssItem.Title = title;
rssItem.Content = content;
rssItem.Date = stringToDateTime(date);
rssItem.Link = new Uri(link);
ret.Add(rssItem);
}
}
info.Items = ret.ToArray();
info.Title = xmlDoc.SelectSingleNode("/rdf:RDF/rss:channel/rss:title", nsmgr).InnerText;
return info;
}
/// <summary>
/// RSS 1.0の読み込みを行います。
/// </summary>
/// <param name="uri">フィードのURL</param>
/// <param name="rssXml">読み込み済みのXMLドキュメント</param>
/// <returns>フィード</returns>
private FeedInfo ReadRSS1(Uri uri, XmlDocument rssXml)
{
FeedInfo info = new FeedInfo();
info.Url = uri;
List <FeedItem> ret = new List <FeedItem>();
XmlNamespaceManager nsmgr = new XmlNamespaceManager(rssXml.NameTable);
nsmgr.AddNamespace("rss", "http://purl.org/rss/1.0/");
nsmgr.AddNamespace("content", "http://purl.org/rss/1.0/modules/content/");
nsmgr.AddNamespace("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
nsmgr.AddNamespace("dc", "http://purl.org/dc/elements/1.1/");
XmlNodeList linodes = rssXml.SelectNodes("/rdf:RDF/rss:channel/rss:items/rdf:Seq/rdf:li", nsmgr);
foreach (XmlNode node in linodes)
{
string strResource = node.Attributes["resource", "http://www.w3.org/1999/02/22-rdf-syntax-ns#"].Value;
XmlNode aboutItem = rssXml.SelectSingleNode("/rdf:RDF/rss:item[@rdf:about='" + strResource + "']", nsmgr);
if (aboutItem != null)
{
XmlNode titleNode = aboutItem.SelectSingleNode("rss:title", nsmgr);
XmlNode contentNode = aboutItem.SelectSingleNode("content:encoded", nsmgr);
XmlNode linkUrkNode = aboutItem.SelectSingleNode("rss:link", nsmgr);
XmlNode dateNode = aboutItem.SelectSingleNode("dc:date", nsmgr);
string title = string.Empty;
string content = string.Empty;
string link = string.Empty;
string date = string.Empty;
if (titleNode != null)
{
title = titleNode.InnerText;
}
if (linkUrkNode != null)
{
link = linkUrkNode.InnerText;
}
if (contentNode != null)
{
content = contentNode.InnerText;
}
if (dateNode != null)
{
date = dateNode.InnerText;
}
FeedItem rssItem = new FeedItem();
rssItem.Title = title;
rssItem.Content = content;
rssItem.Date = stringToDateTime(date);
rssItem.Link = new Uri(link);
ret.Add(rssItem);
}
}
info.Items = ret.ToArray();
info.Title = rssXml.SelectSingleNode("/rdf:RDF/rss:channel/rss:title", nsmgr).InnerText;
return(info);
}