static readonly XNamespace xNamespace = @"http://schemas.microsoft.com/winfx/2006/xaml"; // Used for example for "x:Name" attributes.
public static IEnumerable <XElement> GetAppDotXamlResources(EnvDTE.Project currentProject, EnvDTE.Solution currentSolution, out string appDotXamlFullPath)
{
// Attempt to find the file "App.xaml":
ProjectItem appDotXaml = FindAppDotXaml(currentProject, currentSolution);
if (appDotXaml != null)
{
// Get the full path:
appDotXamlFullPath = appDotXaml.Properties.Item("FullPath").Value.ToString();
// Get the file content:
string appDotXamlContent = File.ReadAllText(appDotXamlFullPath);
// Remove the content of all the "HtmlPresenter" nodes, because the content may be not well formatted and may lead to a syntax error when parsing the XDocument:
appDotXamlContent = HtmlPresenterRemover.RemoveHtmlPresenterNodes(appDotXamlContent);
// Load the file as XML:
XDocument xdoc = XDocument.Parse(appDotXamlContent);
// Get the resources:
var applicationDotResourcesNode = xdoc.Descendants(DefaultXamlNamespace + "Application.Resources").FirstOrDefault();
if (applicationDotResourcesNode != null)
{
IEnumerable <XElement> elementsInsideApplicationDotResourcesNode = applicationDotResourcesNode.Elements(); // This is either <ResourceDictionary>...</ResourceDictionary> or it is the list of resources (in case that <ResourceDictionary>...</ResourceDictionary> is implied).
// Determine whether the <ResourceDictionary> tag is omitted (implicit) or explicitly specified:
bool isTheResourceDictionaryTagExplicitlySpecified =
elementsInsideApplicationDotResourcesNode.Any() && elementsInsideApplicationDotResourcesNode.First().Name == (DefaultXamlNamespace + "ResourceDictionary");
// Change all the the resources "x:Name" into "x:Key" so that we do not get an error if there are two entries with the same "x:Name" in the whole document:
if (isTheResourceDictionaryTagExplicitlySpecified)
{
ChangeAllXNameIntoXKey(elementsInsideApplicationDotResourcesNode.First());
}
else
{
ChangeAllXNameIntoXKey(applicationDotResourcesNode);
}
return(elementsInsideApplicationDotResourcesNode);
}
}
// Failure:
appDotXamlFullPath = null;
return(null);
}
static XElement GetResourceDictionary(string uri, string currentXamlFileNameAndPath, Dictionary <string, Project> assemblyNameToProjectDictionary, ResourcesCache resourcesCache, out string resourceDictionaryFullPath)
{
// Determine the file absolute path of the file (it includes the file name and path):
resourceDictionaryFullPath = GetAbsolutePath(uri, currentXamlFileNameAndPath, assemblyNameToProjectDictionary);
// Read from cache if any (this avoids reloading the files at every refresh, to improve performance:
XElement resourceDictionaryContent;
if (resourcesCache.ResourceDictionaryFileNameToContent.ContainsKey(resourceDictionaryFullPath))
{
resourceDictionaryContent = resourcesCache.ResourceDictionaryFileNameToContent[resourceDictionaryFullPath];
}
else
{
//------------------------
// Not found in the cache
//------------------------
// Get the file content:
string resourceDictionaryXaml = File.ReadAllText(resourceDictionaryFullPath);
// Remove the content of all the "HtmlPresenter" nodes, because the content may be not well formatted and may lead to a syntax error when parsing the XDocument:
resourceDictionaryXaml = HtmlPresenterRemover.RemoveHtmlPresenterNodes(resourceDictionaryXaml);
// Load the file as XML:
XDocument xdoc = XDocument.Parse(resourceDictionaryXaml);
// Get the content:
resourceDictionaryContent = xdoc.Root;
// Add to cache:
resourcesCache.ResourceDictionaryFileNameToContent.Add(resourceDictionaryFullPath, resourceDictionaryContent);
}
return(resourceDictionaryContent);
}
static bool ProcessXamlForDisplay(string sourceXaml, string sourceXamlFileNameAndPath, EnvDTE.Project currentProject, EnvDTE.Solution currentSolution, Dictionary <string, EnvDTE.Project> assemblyNameToProjectDictionary, ResourcesCache resourcesCache, out string outputXaml, out string errorsIfAny, out HashSet <string> warningsAndTips)
{
warningsAndTips = new HashSet <string>();
// Default output values:
outputXaml = sourceXaml;
errorsIfAny = "";
//---------------------------------------
// Remove the content of all the "HtmlPresenter" nodes, because the content may be not well formatted and may lead to a syntax error when parsing the XDocument:
//---------------------------------------
sourceXaml = HtmlPresenterRemover.RemoveHtmlPresenterNodes(sourceXaml);
//---------------------------------------
// Read the XDocument:
//---------------------------------------
System.Xml.Linq.XDocument xdoc;
try
{
xdoc = System.Xml.Linq.XDocument.Parse(sourceXaml);
}
catch (Exception ex)
{
errorsIfAny = ex.Message;
return(false);
}
//---------------------------------------
// Remove the "x:Class" attribute if any:
//---------------------------------------
if (xdoc.Root != null)
{
// Remove the "x:Class" attribute if any:
XNamespace xNamespace = "http://schemas.microsoft.com/winfx/2006/xaml";
XAttribute classAttributeIfAny = xdoc.Root.Attribute(xNamespace + "Class");
if (classAttributeIfAny != null)
{
classAttributeIfAny.Remove();
}
}
//---------------------------------------
// Replace the root control with a UserControl (if it is not already one) and keep only the properties and attributes supported by the UserControl class:
//---------------------------------------
ProcessNodeToMakeItCompatibleWithWpf.ReplaceRootWithUserControl(xdoc);
//---------------------------------------
// Get the styles and other resources defined in App.xaml
//---------------------------------------
IEnumerable <XElement> appDotXamlResources;
string appDotXamlFullPath;
if (resourcesCache.AppDotXamlResources != null) // This avoids reloading App.xaml at every refresh, to improve performance.
{
// Read from cache:
appDotXamlResources = resourcesCache.AppDotXamlResources;
appDotXamlFullPath = resourcesCache.AppDotXamlFullPath;
}
else
{
// Attempt to find App.xaml and read it:
appDotXamlResources = ResolvingReferencedXamlResources.GetAppDotXamlResources(currentProject, currentSolution, out appDotXamlFullPath);
resourcesCache.AppDotXamlResources = appDotXamlResources;
resourcesCache.AppDotXamlFullPath = appDotXamlFullPath;
}
//---------------------------------------
// Resolve all the "Merged Dictionaries", and merge them so that there are no more references to other XAML files:
//---------------------------------------
// Process the resources defined in App.xaml:
if (appDotXamlResources != null)
{
try
{
foreach (XElement element in appDotXamlResources)
{
ResolvingReferencedXamlResources.ResolveAndMergeTheMergedDictionaries(element, appDotXamlFullPath, assemblyNameToProjectDictionary, new HashSet <string>(), resourcesCache);
}
}
catch (Exception ex)
{
errorsIfAny = ex.Message;
return(false);
}
}
// Process the resources defined in the current file:
try
{
ResolvingReferencedXamlResources.ResolveAndMergeTheMergedDictionaries(xdoc.Root, sourceXamlFileNameAndPath, assemblyNameToProjectDictionary, new HashSet <string>(), resourcesCache);
}
catch (Exception ex)
{
errorsIfAny = ex.Message;
return(false);
}
//---------------------------------------
// Surround the document with a control in which we inject all the resources that we found in the end-user's "App.xaml" file:
//---------------------------------------
if (appDotXamlResources != null && appDotXamlResources.Any())
{
// Put those resouces in a control that will surround the xaml of the current page:
var surroundingControlForResources = new XElement(DefaultXamlNamespace + "Border", xdoc.Root);
surroundingControlForResources.Add(new XAttribute(XNamespace.Xmlns + "x", @"http://schemas.microsoft.com/winfx/2006/xaml")); // Note: This is required in case the XAML code contains the "x" prefix inside Markup Extensions (such as "{x:Null}"). It is not needed for the "x" prefix in elements and attributes (such as "x:Name"), because those are automatically imported when copying nodes, where as markup extensions are considered as simple strings by "Linq to XML".
surroundingControlForResources.Add(new XAttribute("Tag", "AddedByDesignerToInjectAppDotXamlResources"));
var resourcesContainer = new XElement(DefaultXamlNamespace + "Border.Resources");
surroundingControlForResources.AddFirst(resourcesContainer);
resourcesContainer.Add(appDotXamlResources);
// Replace the document with the one surrounded by the new control:
xdoc = new XDocument(surroundingControlForResources);
}
#if Display_The_Processed_XAML
// Uncomment to display the processed XAML:
errorsIfAny = xdoc.Root.ToString();
outputXaml = xdoc.Root.ToString();
return(false);
#endif
//---------------------------------------
// Iterate through the document using a Stack<XElement> (pre-order traversal, no recursion) and process the nodes:
//---------------------------------------
XElement root = xdoc.Root;
Stack <System.Xml.Linq.XElement> stack = new Stack <System.Xml.Linq.XElement>();
stack.Push(root);
while (stack.Count > 0)
{
System.Xml.Linq.XElement current = stack.Pop();
bool elementWasReplacedWithPlaceholder = false; // default value
//---------------------------------------
// Process node to make it compatible with WPF (remove events such as PointerPressed, change "Page" to "UserControl", etc.):
//---------------------------------------
ProcessNodeToMakeItCompatibleWithWpf.Process(current, ref warningsAndTips);
//---------------------------------------
// Remove unknown nodes and attributes, and display "Cannot preview this element" instead:
//---------------------------------------
// Verify that the node is not a property:
if (!current.Name.LocalName.Contains("."))
{
bool isKnownType = false;
// Check to see if the element corresponds to a known type (only for elements that are supposed to be in the default namespace):
Type type;
if (current.Name.NamespaceName == DefaultXamlNamespace &&
TryGetType(current.Name, out type))
{
isKnownType = true;
// List all the event handlers of the type:
List <string> eventHandlers = new List <string>();
foreach (EventInfo eventInfo in type.GetEvents())
{
eventHandlers.Add(eventInfo.Name);
}
// Duplicate the list of attributes so that when we remove one, it doesn't affect the iteration:
List <System.Xml.Linq.XAttribute> attributesListCopy = new List <System.Xml.Linq.XAttribute>();
foreach (System.Xml.Linq.XAttribute attr in current.Attributes())
{
attributesListCopy.Add(attr);
}
// Remove event handlers:
foreach (System.Xml.Linq.XAttribute attr in attributesListCopy)
{
// Check if the attribute is an event handler:
//test+= " |||| " + attr.Name.LocalName + " " + attr.Name.NamespaceName + " " + (!attr.Name.LocalName.Contains(".")).ToString() + " " + eventHandlers.Contains(attr.Name.LocalName).ToString();
if (!attr.Name.LocalName.Contains(".") && eventHandlers.Contains(attr.Name.LocalName))
{
// Remove the attrbute:
attr.Remove();
}
}
}
else if (current.Name.NamespaceName.EndsWith("assembly=mscorlib"))
{
isKnownType = true;
}
// If not known type, replace the element with a placeholder that says "Unable to display":
if (!isKnownType)
{
// Create a border with inside a TextBlock that says "Unable to display":
System.Xml.Linq.XElement msg = new System.Xml.Linq.XElement(DefaultXamlNamespace + "Border");
System.Xml.Linq.XElement msgTxt = new System.Xml.Linq.XElement(DefaultXamlNamespace + "TextBlock");
// Add the newly created stuff to the XAML:
current.ReplaceWith(msg);
msg.Add(msgTxt);
// Set some attributes:
msg.Add(new XAttribute("Background", "DarkRed"));
msg.Add(new XAttribute("Opacity", "0.5"));
msg.Add(new XAttribute("Tag", "AddedByDesignerAsPlaceholder"));
msgTxt.Add(new XAttribute("Text", "Unable to preview this element"));
msgTxt.Add(new XAttribute("TextWrapping", "Wrap"));
msgTxt.Add(new XAttribute("TextAlignment", "Center"));
msgTxt.Add(new XAttribute("HorizontalAlignment", "Stretch"));
msgTxt.Add(new XAttribute("VerticalAlignment", "Center"));
msgTxt.Add(new XAttribute("FontSize", "12"));
msgTxt.Add(new XAttribute("Foreground", "#AAFFFFFF"));
msgTxt.Add(new XAttribute("Tag", "AddedByDesignerForRendering"));
// Give to that Border the same positioning information as the element that it replaces:
MoveAttributeIfAny("Width", current, msg);
MoveAttributeIfAny("Height", current, msg);
MoveAttributeIfAny("HorizontalAlignment", current, msg);
MoveAttributeIfAny("VerticalAlignment", current, msg);
MoveAttributeIfAny("Margin", current, msg);
MoveAttributeIfAny("Opacity", current, msg);
MoveAttributeIfAny("MaxWidth", current, msg);
MoveAttributeIfAny("MaxHeight", current, msg);
MoveAttributeIfAny("MinWidth", current, msg);
MoveAttributeIfAny("MinHeight", current, msg);
MoveAttributeIfAny("Visibility", current, msg);
MoveAttributeIfAny("Canvas.Left", current, msg);
MoveAttributeIfAny("Canvas.Top", current, msg);
MoveAttributeIfAny((XNamespace)"clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit" + "DockPanel.Dock", current, msg);
MoveAttributeIfAny((XNamespace)"http://schemas.microsoft.com/winfx/2006/xaml" + "Name", current, msg);
MoveAttributeIfAny((XNamespace)"http://schemas.microsoft.com/winfx/2006/xaml" + "Key", current, msg);
// Remember that the element was replaced:
elementWasReplacedWithPlaceholder = true;
}
}
// Continue with the children of this element:
if (!elementWasReplacedWithPlaceholder)
{
foreach (XElement element in current.Elements())
{
stack.Push(element);
}
}
}
errorsIfAny = ""; //xdoc.ToString();
outputXaml = root.ToString();
return(true);
}
