public void AttachTo(IHtmlDocument document)
{
Contract.RequiresNotNull(document, "document");
var documentAdapter = document as HtmlDocumentAdapter;
Contract.Requires(documentAdapter != null, "Only documents of type {0} supported", typeof(HtmlDocumentAdapter).FullName);
// WebBrowser reused HtmlDocument instances
// -> we cannot ignore assignment of same HtmlDocument here
var behaviorHashCode = documentAdapter.Document.Body.GetAttribute("RaynMakerHtmlMarkupBehavior");
Contract.Invariant(string.IsNullOrEmpty(behaviorHashCode) || behaviorHashCode == GetHashCode().ToString(),
"A HtmlMarkupBehavior already attached to the given HtmlDocument. Only one attached HtmlMarkupBehavior per HtmlDocument supported");
Detach();
Document = documentAdapter;
Document.Document.Click += HtmlDocument_Click;
Document.Document.Body.SetAttribute("RaynMakerHtmlMarkupBehavior", GetHashCode().ToString());
// In Detach() we resetted everything so nothing to apply here
// Apply();
}
/// <summary>
/// Constructor.
/// <remarks>
/// Default markup color: yellow.
/// </remarks>
/// </summary>
public HtmlMarker(HtmlDocumentAdapter document)
{
myDocument = document;
MarkedElements = new List <HtmlElement>();
DefaultColor = Color.Yellow;
}
private async Task SavePage(long pageNumber, string pageUrl, HtmlDocumentAdapter html)
{
using (var stream1 = new FileStream(_filesLocationPrefix + "/" + pageNumber + ".html", FileMode.OpenOrCreate))
{
var buffer = Encoding.UTF8.GetBytes(html.ToString());
await stream1.WriteAsync(buffer, 0, buffer.Length);
}
}
public void SelectedElement_NoDocumentAttached_Throws()
{
var behavior = new HtmlMarkupBehavior <HtmlElementMarker>(new HtmlElementMarker(Color.Yellow));
myBrowser.LoadHtml(HtmlDocument1);
var document = new HtmlDocumentAdapter(myBrowser.Document);
var ex = Assert.Throws <InvalidOperationException>(() => behavior.SelectedElement = ( HtmlElementAdapter )document.GetElementById("x11"));
Assert.That(ex.Message, Does.Contain("Document not attached"));
}
public void PathToSelectedElement_NoDocumentAttached_PathSet()
{
var behavior = new HtmlMarkupBehavior <HtmlElementMarker>(new HtmlElementMarker(Color.Yellow));
myBrowser.LoadHtml(HtmlDocument1);
var document = new HtmlDocumentAdapter(myBrowser.Document);
var path = document.GetElementById("x11").GetPath().ToString();
behavior.PathToSelectedElement = path;
Assert.That(behavior.PathToSelectedElement, Is.EqualTo(path));
}
public void PathToSelectedElement_SetToNull_SelectedElementAdjusted()
{
myBrowser.LoadHtml(HtmlDocument1);
var document = new HtmlDocumentAdapter(myBrowser.Document);
var behavior = new HtmlMarkupBehavior <HtmlElementMarker>(new HtmlElementMarker(Color.Yellow));
behavior.AttachTo(document);
behavior.PathToSelectedElement = null;
Assert.That(behavior.SelectedElement, Is.Null);
}
public void PathToSelectedElement_SetToNotNull_SelectedElementAdjusted()
{
myBrowser.LoadHtml(HtmlDocument1);
var document = new HtmlDocumentAdapter(myBrowser.Document);
var behavior = new HtmlMarkupBehavior <HtmlElementMarker>(new HtmlElementMarker(Color.Yellow));
behavior.AttachTo(document);
behavior.PathToSelectedElement = document.GetElementById("x11").GetPath().ToString();
Assert.That(behavior.SelectedElement, Is.SameAs(document.GetElementById("x11")));
}
public void AttachTo_SetToDocumentToWhichAnotherBehaviorIsAlreadyAttached_Throws()
{
myBrowser.LoadHtml(HtmlDocument1);
var document = new HtmlDocumentAdapter(myBrowser.Document);
var behavior1 = new HtmlMarkupBehavior <HtmlElementMarker>(new HtmlElementMarker(Color.Yellow));
behavior1.AttachTo(document);
var behavior2 = new HtmlMarkupBehavior <HtmlElementMarker>(new HtmlElementMarker(Color.Red));
var ex = Assert.Throws <InvalidOperationException>(() => behavior2.AttachTo(document));
Assert.That(ex.Message, Does.Contain("Only one attached HtmlMarkupBehavior per HtmlDocument supported"));
}
public void Detach_WhenCalled_AnotherBehaviorCanBeAttached()
{
myBrowser.LoadHtml(HtmlDocument1);
var document = new HtmlDocumentAdapter(myBrowser.Document);
var behavior1 = new HtmlMarkupBehavior <HtmlElementMarker>(new HtmlElementMarker(Color.Yellow));
behavior1.AttachTo(document);
behavior1.Detach();
var behavior2 = new HtmlMarkupBehavior <HtmlElementMarker>(new HtmlElementMarker(Color.Red));
behavior2.AttachTo(document);
Assert.That(behavior1.Document, Is.Null);
Assert.That(behavior2.Document, Is.EqualTo(document));
}
public void PathToSelectedElement_WhenSet_SelectionChangedRaised()
{
myBrowser.LoadHtml(HtmlDocument1);
var document = new HtmlDocumentAdapter(myBrowser.Document);
var behavior = new HtmlMarkupBehavior <HtmlElementMarker>(new HtmlElementMarker(Color.Yellow));
behavior.AttachTo(document);
bool selectionChangedRaised = false;
behavior.SelectionChanged += (s, e) => selectionChangedRaised = true;
behavior.PathToSelectedElement = document.GetElementById("x11").GetPath().ToString();;
Assert.That(selectionChangedRaised, Is.True);
}
public void Detach_WhenCalled_SelectedElementAndPathAndDocumentNulled()
{
myBrowser.LoadHtml(HtmlDocument1);
var document = new HtmlDocumentAdapter(myBrowser.Document);
var behavior = new HtmlMarkupBehavior <HtmlElementMarker>(new HtmlElementMarker(Color.Yellow));
behavior.AttachTo(document);
behavior.SelectedElement = ( HtmlElementAdapter )document.GetElementById("x11");
behavior.Detach();
Assert.That(behavior.Document, Is.Null);
Assert.That(behavior.SelectedElement, Is.Null);
Assert.That(behavior.PathToSelectedElement, Is.Null);
}
public async Task Crawl()
{
var index = 1;
while (_traversalQueue.Count != 0)
{
var pageUrl = _traversalQueue.Peek();
var response = await GetResponse(pageUrl);
if (!response.IsSuccessStatusCode)
{
_traversalQueue.Dequeue();
continue;
}
var htmlDoc = new HtmlDocumentAdapter(await response.Content.ReadAsStreamAsync());
if (htmlDoc.GetInnerTextLength() < _options.MinWordsCount)
{
_traversalQueue.Dequeue();
continue;
}
await SavePage(index, pageUrl, htmlDoc);
_indexed.TryAdd(index + ".html", pageUrl);
_processedPagesCount++;
_crawledUrls.Add(_traversalQueue.Dequeue());
if (Balance != 0)
{
UpdateQueue(htmlDoc);
}
index++;
}
if (_indexed.Count != 0)
{
SaveIndex();
}
}
public void Detach()
{
if (Document == null)
{
return;
}
Document.Document.Click -= HtmlDocument_Click;
mySelectedElement = null;
myPath = null;
// We have to unmark all because anyway with new document the HtmlElements inside the Marker are invalid.
// We do not call Reset() in order to keep the settings in the Marker (e.g. HtmlTableMarker).
Marker.Unmark();
Document.Document.Body.SetAttribute("RaynMakerHtmlMarkupBehavior", null);
Document = null;
}
private void UpdateQueue(HtmlDocumentAdapter htmlDoc)
{
var urls = htmlDoc
.GetDocumentHrefUrls(RootSiteUri.AbsoluteUri)
.Except(_crawledUrls)
.Distinct()
.ToArray();
if (urls.Length == 0)
{
return;
}
var limit = _traversalQueue.Count >= Balance ? 0 : Balance - _traversalQueue.Count;
var limitedUrls = limit > urls.Length ? urls : urls.Take(limit).ToArray();
foreach (var url in limitedUrls)
{
_traversalQueue.Enqueue(url);
}
}
