/// <summary>
/// Scrapes the HTML page and populates the "Code" structure.
/// </summary>
public void GetScriptTags()
{
var scriptTags = HtmlPage.Document.GetElementsByTagName("script");
foreach (ScriptObject scriptTag in scriptTags)
{
var e = (HtmlElement)scriptTag;
var type = (string)e.GetAttribute("type");
if (type == null || !LanguageFound(GetLanguageNameFrom(type)))
{
continue;
}
if (DynamicApplication.Current.InitParams.ContainsKey("xamlid"))
{
if (e.CssClass == null || !e.CssClass.Contains(DynamicApplication.Current.InitParams["xamlid"]))
{
continue;
}
}
else if (e.CssClass != string.Empty)
{
continue;
}
var src = (string)e.GetAttribute("src");
bool defer = (bool)e.GetProperty("defer");
string language = GetLanguageNameFrom(type).ToLower();
_LangConfig.LanguagesUsed[language] = true;
var sc = new ScriptCode(language, defer);
if (src != null)
{
sc.External = DynamicApplication.MakeUri(src);
}
else
{
var innerHtml = (string)e.GetProperty("innerHTML");
if (innerHtml != null)
{
sc.Inline = RemoveMargin(innerHtml);
}
}
Code.Add(sc);
}
}
/// <summary>
/// Gets a file out of the download cache. This does not download the
/// file if it is not in the cache; use "DownloadAndCache" before
/// using this method download the file and cache it.
/// </summary>
/// <param name="baseUri">
/// URI to base relative URI's off of. If null, it defaults to the HTML
/// page's URI.
/// </param>
/// <param name="relativeUri">URI relative to the base URI</param>
/// <returns>A stream for the URI</returns>
protected override Stream GetFileInternal(object baseUri, Uri relativeUri)
{
// check in the XAP first
// TODO: Can this check happen further up?
if (!relativeUri.IsAbsoluteUri)
{
var stream = XapPAL.PAL.VirtualFilesystem.GetFile(relativeUri);
if (stream != null)
{
return(stream);
}
}
var fullUri = DynamicApplication.MakeUri((Uri)baseUri, relativeUri);
if (_cache.Has(fullUri))
{
return(new MemoryStream(System.Text.Encoding.UTF8.GetBytes(_cache[fullUri])));
}
else
{
return(null);
}
}
/// <summary>
/// Gets a file out of the download cache. This does not download the
/// file if it is not in the cache; use "DownloadAndCache" before
/// using this method download the file and cache it.
/// </summary>
/// <param name="baseUri">
/// URI to base relative URI's off of. If null, it defaults to the HTML
/// page's URI.
/// </param>
/// <param name="relativeUri">URI relative to the base URI</param>
/// <returns>A stream for the URI</returns>
protected override Stream GetFileInternal(object baseUri, Uri relativeUri)
{
if (!relativeUri.IsAbsoluteUri)
{
// TODO: HttpVirtualFilesystem shouldn't manage all these checks,
// needs to be re-organized.
// check in the XAP first
var stream = XapPAL.PAL.VirtualFilesystem.GetFile(relativeUri);
if (stream != null)
{
return(stream);
}
// also check any ZIP files
if (HtmlPage.IsEnabled && (DynamicApplication.Current != null && DynamicApplication.Current.ScriptTags != null))
{
foreach (var zip in DynamicApplication.Current.ScriptTags.ZipPackages)
{
var relUriStr = relativeUri.ToString();
var dirname = Path.GetDirectoryName(relUriStr);
if (dirname.Length == 0)
{
continue;
}
var dirs = dirname.Split('/');
if (dirs.Length == 0)
{
continue;
}
var toplevelDir = dirs[0];
if (toplevelDir != Path.GetFileNameWithoutExtension(zip.ToString()))
{
continue;
}
var rest = relUriStr.Split(new string[] { toplevelDir + "/" }, StringSplitOptions.None);
if (rest.Length <= 1)
{
continue;
}
var pathToFileInZip = rest[1];
var file = XapPAL.PAL.VirtualFilesystem.GetFile(
new StreamResourceInfo(GetFileInternal(baseUri, zip), null), pathToFileInZip
);
if (file != null)
{
return(file);
}
}
}
}
var fullUri = DynamicApplication.MakeUri((Uri)baseUri, relativeUri);
if (_cache.Has(fullUri))
{
byte[] bytes = _cache.GetBinary(fullUri);
string strContent = _cache.Get(fullUri);
return(new MemoryStream(
strContent != null ?
System.Text.Encoding.UTF8.GetBytes(strContent) :
bytes
));
}
else
{
return(null);
}
}
/// <summary>
/// Scrapes the HTML page and populates the "Code" structure.
/// </summary>
public void FetchScriptTags()
{
if (!HtmlPage.IsEnabled)
{
return;
}
var scriptTags = HtmlPage.Document.GetElementsByTagName("script");
foreach (ScriptObject scriptTag in scriptTags)
{
var e = (HtmlElement)scriptTag;
var type = (string)e.GetAttribute("type");
var src = (string)e.GetAttribute("src");
string language = null;
// Find the language by either mime-type or script's file extension
if (type != null)
{
language = GetLanguageByType(type);
}
else if (src != null)
{
language = GetLanguageByExtension(Path.GetExtension(src));
}
// Only move on if the language was found
if (language != null)
{
var initParams = DynamicApplication.Current.InitParams;
// Process this script-tag if ...
if (
// it's class is "*" ... OR
(e.CssClass == "*") ||
// the xamlid initparam is set and matches this tag's class ... OR
(initParams.ContainsKey("xamlid") && initParams["xamlid"] != null &&
e.CssClass != null && e.CssClass == initParams["xamlid"]) ||
// the xamlid initparam is not set and this tag does not have a class
(!initParams.ContainsKey("xamlid") && (e.CssClass == null || e.CssClass.Length == 0))
)
{
bool defer = (bool)e.GetProperty("defer");
_LangConfig.LanguagesUsed[language] = true;
var sc = new ScriptCode(language, defer);
if (src != null)
{
sc.External = DynamicApplication.MakeUri(src);
}
else
{
var innerHtml = (string)e.GetProperty("innerHTML");
if (innerHtml != null)
{
// IE BUG: inline script-tags have an extra newline at the front,
// so remove it ...
if (HtmlPage.BrowserInformation.Name == "Microsoft Internet Explorer" && innerHtml.IndexOf("\r\n") == 0)
{
innerHtml = innerHtml.Substring(2);
}
sc.Inline = innerHtml;
}
}
Code.Add(sc);
}
// Lastly, check to see if this is a zip file
}
else if (src != null && ((type != null && type == "application/x-zip-compressed") || Path.GetExtension(src) == ".zip"))
{
ZipPackages.Add(DynamicApplication.MakeUri(src));
}
}
}
/// <summary>
/// Finds the script-tag that corresponds with this Silverlight control,
/// and download the src if need be. When the downloads complete (or
/// if there is nothing to download), set the RootVisual to the xaml
/// content.
/// </summary>
public static void Load()
{
// If there is no xamlid, then this control doesn't process XAML
// script tags.
if (!DynamicApplication.Current.InitParams.ContainsKey("xamlid"))
{
return;
}
// Look for the element with an id matching the value of xamlid,
// and abort if it's not found.
var id = DynamicApplication.Current.InitParams["xamlid"];
if (id == null)
{
return;
}
var xamlScriptTag = (HtmlElement)HtmlPage.Document.GetElementById(id);
if (xamlScriptTag == null)
{
return;
}
// Fetch the external URI.
var src = (string)xamlScriptTag.GetProperty("src");
// Define XAML now so "onComplete" can close over it.
string xaml = null;
Action onComplete = () => {
// Fetch innerHTML if inline, or the downloaded file otherwise
xaml = src == string.Empty ?
(string)xamlScriptTag.GetProperty("innerHTML") :
BrowserPAL.PAL.VirtualFilesystem.GetFileContents(DynamicApplication.MakeUri(src));
// Rewrite the XAML to remove CDATA or <?xml line
var r = new StringReader(xaml);
var w = new StringWriter();
string line;
while ((line = r.ReadLine()) != null)
{
if (line.Trim() == "<![CDATA[" || line.Trim() == "]]>" || line.Contains("<?xml"))
{
continue;
}
w.WriteLine(line);
}
xaml = w.ToString();
// set the RootVisual
DynamicApplication.Current.LoadRootVisualFromString(xaml);
};
// If src is set, download the src and invoke onComplete when the
// download is finished. Otherwise, just invoke onComplete.
if (src == string.Empty)
{
onComplete.Invoke();
}
else
{
((HttpVirtualFilesystem)HttpPAL.PAL.VirtualFilesystem).
DownloadAndCache(new List <Uri>()
{
DynamicApplication.MakeUri((string)src)
}, onComplete);
}
}
/// <summary>
/// Finds the script-tag that corresponds with this Silverlight control,
/// and download the src if need be. When the downloads complete (or
/// if there is nothing to download), set the RootVisual to the xaml
/// content.
/// </summary>
public static void Load()
{
// If there is no xamlid, then this control doesn't process XAML
// script tags.
if (!DynamicApplication.Current.InitParams.ContainsKey("xamlid"))
{
return;
}
// Look for the element with an id matching the value of xamlid,
// and abort if it's not found.
var id = DynamicApplication.Current.InitParams["xamlid"];
if (id == null)
{
return;
}
var xamlScriptTag = (HtmlElement)HtmlPage.Document.GetElementById(id);
if (xamlScriptTag == null)
{
return;
}
// Make sure it has the proper mime-type
var type = (string)xamlScriptTag.GetAttribute("type");
if (type != "application/xaml+xml" && type != "application/xml+xaml")
{
return;
}
// Fetch the external URI.
var src = (string)xamlScriptTag.GetAttribute("src");
// Should the loading of the XAML be deferred?
bool defer = (bool)xamlScriptTag.GetProperty("defer");
// Define XAML now so "onComplete" can close over it.
string xaml = null;
Action onComplete = () => {
// Only load "non-deffered" script-tags. Being deffered just means
// the XAML isn't loaded, but it is already downloaded (if it was
// an external script-tag), so users can just get it from the virtual
// file-system. Inline XAML which is deferred can only be accessed by
// getting it from the DOM.
if (defer)
{
return;
}
// Fetch innerHTML if inline, otherwise get the contents from the download cache
xaml = (src == null || src.Length == 0 ?
(string)xamlScriptTag.GetProperty("innerHTML") :
BrowserPAL.PAL.VirtualFilesystem.GetFileContents(DynamicApplication.MakeUri(src))
).Trim();
// set the RootVisual
DynamicApplication.Current.LoadRootVisualFromString(AddNamespaces(StripCDATA(xaml)));
};
// If src is set, download the src and invoke onComplete when the
// download is finished. Otherwise, just invoke onComplete.
if (src == null || src.Length == 0)
{
onComplete.Invoke();
}
else
{
((HttpVirtualFilesystem)HttpPAL.PAL.VirtualFilesystem).
DownloadAndCache(new List <Uri>()
{
DynamicApplication.MakeUri((string)src)
}, onComplete);
}
}
