public MCSWebBrowser BrowserFromCache(string applicationName)
{
WaitForBrowsersToInitialize();
lock (BrowserStorage)
{
if (cache.Count > 0)
{ // initialized browsers
MCSWebBrowser b = cache[0] as MCSWebBrowser;
if (BrowserStorage.Children.Contains(cache[0]))
{
BrowserStorage.Children.Remove(cache[0]);
}
cache.RemoveAt(0);
b.Reset(applicationName);
return(b);
}
else
{
Debug.Assert(BrowserStorage.Children.Count == 0);
Trace.WriteLine("Browser Cache empty, providing uninitialized browser!");
MCSWebBrowser b = new MCSWebBrowser();
b.Reset(applicationName);
return(b);
}
}
}
private void ClearCache()
{
lock (BrowserStorage)
{
cache.Clear();
while (BrowserStorage.Children.Count > 0)
{
MCSWebBrowser b = BrowserStorage.Children[0] as MCSWebBrowser;
BrowserStorage.Children.RemoveAt(0);
b.Dispose();
}
}
}
void LoadupCache()
{
lock (BrowserStorage)
{
for (int i = BrowserStorage.Children.Count; i < cachesize; i++)
{
MCSWebBrowser browser = new MCSWebBrowser();
BrowserStorage.Children.Add(browser);
browser.BrowserObjectAppeared += browser_BrowserObjectAppeared;
browser.Navigate("about:blank"); // trigger the load of the browser instance
}
}
}
public void BrowserToCache(MCSWebBrowser webBrowser)
{
lock (BrowserStorage)
{
if (allowGrow == false && BrowserStorage.Children.Count >= cachesize)
{
webBrowser.Dispose();
return;
}
BrowserStorage.Children.Add(webBrowser);
cache.Add(webBrowser); // assume this is an initialized browser
webBrowser.HaltUse();
}
}
private void WaitForBrowsersToInitialize()
{
int cacheCount, childrenCount;
lock (cache)
cacheCount = cache.Count;
lock (BrowserStorage)
childrenCount = BrowserStorage.Children.Count;
DateTime dtTimeout = DateTime.Now + TimeSpan.FromSeconds(5);
while (cacheCount == 0 && childrenCount > 0)
{
if (DateTime.Now > dtTimeout)
{
lock (BrowserStorage)
{
for (int i = 0; i < BrowserStorage.Children.Count; i++)
{
MCSWebBrowser b = BrowserStorage.Children[i] as MCSWebBrowser;
if (b != null)
{
b.Navigate("about:blank"); // try again to get this going
}
}
dtTimeout = DateTime.Now + TimeSpan.FromSeconds(5);
}
}
// browsers initializing
System.Windows.Forms.Application.DoEvents();
lock (cache)
cacheCount = cache.Count;
lock (BrowserStorage)
childrenCount = BrowserStorage.Children.Count;
}
}
