private void WebBrowser_NavigationCompleted(object sender, CoreWebView2NavigationCompletedEventArgs e)
{
DotnetInterop = new WebViewPreviewDotnetInterop(Model, WebBrowser);
WebBrowser.CoreWebView2.AddHostObjectToScript("mm", DotnetInterop);
JsInterop = DotnetInterop.JsInterop;
JsInterop.InitializeInterop();
}
private void WebBrowser_NavigationCompleted(object sender, CoreWebView2NavigationCompletedEventArgs e)
{
// Assign interop objects for each request
DotnetInterop = new WebViewPreviewDotnetInterop(Model, WebBrowser);
JsInterop = DotnetInterop.JsInterop;
WebBrowser.CoreWebView2.AddHostObjectToScript("mm", DotnetInterop);
DotnetInterop.InitializeInteropAsync().ConfigureAwait(false).GetAwaiter();
}
async Task InitializeAsync()
{
// must create a data folder if running out of a secured folder that can't write like Program Files
var browserFolder = Path.Combine(mmApp.Configuration.CommonFolder, "WebView_Browser");
var env = await CoreWebView2Environment.CreateAsync(
userDataFolder : browserFolder
);
await WebBrowser.EnsureCoreWebView2Async(env);
WebBrowser.NavigationCompleted += WebBrowser_NavigationCompleted;
if (Model.Configuration.System.ShowDeveloperToolsOnStartup)
{
WebBrowser.CoreWebView2.OpenDevToolsWindow();
}
// Set up interop object to pass into JavaScript
DotnetInterop = new WebViewPreviewDotnetInterop(Model, WebBrowser);
JsInterop = DotnetInterop.JsInterop;
WebBrowser.CoreWebView2.AddHostObjectToScript("mm", DotnetInterop);
}
async Task InitializeAsync()
{
// initial assignment of interop objects
//DotnetInterop = new WebViewPreviewDotnetInterop(Model, WebBrowser);
//JsInterop = DotnetInterop.JsInterop;
var browserFolder = Path.Combine(mmApp.Configuration.CommonFolder, "WebView_Browser");
// must create a data folder if running out of a secured folder that can't write like Program Files
var env = await CoreWebView2Environment.CreateAsync(
userDataFolder : browserFolder
);
await WebBrowser.EnsureCoreWebView2Async(env);
if (Model.Configuration.System.ShowDeveloperToolsOnStartup)
{
WebBrowser.CoreWebView2.OpenDevToolsWindow();
}
// initialize here 'initially' then re-initialize for each navigation
DotnetInterop = new WebViewPreviewDotnetInterop(Model, WebBrowser);
JsInterop = DotnetInterop.JsInterop;
}
public void PreviewMarkdown(MarkdownDocumentEditor editor = null,
bool keepScrollPosition = false, bool showInBrowser = false,
string renderedHtml = null, int editorLineNumber = -1)
{
if (DotnetInterop == null)
{
return;
}
try
{
// only render if the preview is actually visible and rendering in Preview Browser
if (!Model.IsPreviewBrowserVisible && !showInBrowser)
{
return;
}
if (editor == null)
{
editor = Window.GetActiveMarkdownEditor();
}
if (editor == null)
{
return;
}
var doc = editor.MarkdownDocument;
var ext = Path.GetExtension(doc.Filename).ToLower().Replace(".", "");
string mappedTo = "markdown";
if (!string.IsNullOrEmpty(renderedHtml))
{
mappedTo = "html";
ext = null;
}
else
{
// only show preview for Markdown and HTML documents
Model.Configuration.EditorExtensionMappings.TryGetValue(ext, out mappedTo);
mappedTo = mappedTo ?? string.Empty;
}
if (string.IsNullOrEmpty(ext) || mappedTo == "markdown" || mappedTo == "html")
{
// TODO: Get DOM and
//dynamic dom = null;
//if (!showInBrowser)
//{
// if (keepScrollPosition)
// {
// dom = WebBrowser..Document;
// editor.MarkdownDocument.LastEditorLineNumber = dom.documentElement.scrollTop;
// }
// else
// {
// Window.ShowPreviewBrowser(false, false);
// editor.MarkdownDocument.LastEditorLineNumber = 0;
// }
//}
if (mappedTo == "html")
{
if (string.IsNullOrEmpty(renderedHtml))
{
renderedHtml = editor.MarkdownDocument.CurrentText;
}
if (!editor.MarkdownDocument.WriteFile(editor.MarkdownDocument.HtmlRenderFilename, renderedHtml))
{
// need a way to clear browser window
return;
}
}
else
{
bool usePragma = !showInBrowser && mmApp.Configuration.PreviewSyncMode != PreviewSyncMode.None;
if (string.IsNullOrEmpty(renderedHtml))
{
renderedHtml = editor.MarkdownDocument.RenderHtmlToFile(usePragmaLines: usePragma);
}
if (renderedHtml == null)
{
Window.SetStatusIcon(FontAwesomeIcon.Warning, Colors.Red, false);
Window.ShowStatus($"Access denied: {Path.GetFileName(editor.MarkdownDocument.Filename)}",
5000);
// need a way to clear browser window
return;
}
renderedHtml = StringUtils.ExtractString(renderedHtml,
"<!-- Markdown Monster Content -->",
"<!-- End Markdown Monster Content -->");
}
if (showInBrowser)
{
var url = editor.MarkdownDocument.HtmlRenderFilename;
mmFileUtils.ShowExternalBrowser(url);
return;
}
WebBrowser.Cursor = System.Windows.Input.Cursors.None;
WebBrowser.ForceCursor = true;
// if content contains <script> tags we must do a full page refresh
bool forceRefresh = renderedHtml != null && renderedHtml.Contains("<script ");
if (keepScrollPosition && !mmApp.Configuration.AlwaysUsePreviewRefresh && !forceRefresh)
{
string browserUrl = WebBrowser.Source?.ToString().ToLower();
string documentFile = "file:///" +
editor.MarkdownDocument.HtmlRenderFilename.Replace('\\', '/')
.ToLower();
if (browserUrl == documentFile)
{
if (string.IsNullOrEmpty(renderedHtml))
{
PreviewMarkdown(editor, false, false); // fully reload document
}
else
{
try
{
JsInterop = DotnetInterop.JsInterop;
int lineno = editor.GetLineNumber();
_ = JsInterop.UpdateDocumentContent(renderedHtml, lineno);
try
{
// scroll preview to selected line
if (mmApp.Configuration.PreviewSyncMode ==
PreviewSyncMode.EditorAndPreview ||
mmApp.Configuration.PreviewSyncMode == PreviewSyncMode.EditorToPreview)
{
if (lineno > -1)
{
_ = JsInterop.ScrollToPragmaLine(lineno);
}
}
}
catch
{
/* ignore scroll error */
}
}
catch
{
// Refresh doesn't fire Navigate event again so
// the page is not getting initiallized properly
//PreviewBrowser.Refresh(true);
WebBrowser.Tag = "EDITORSCROLL";
WebBrowser.Source = new Uri(editor.MarkdownDocument.HtmlRenderFilename);
mmApp.Log("Document Update Crash", null, false, LogLevels.Information);
}
}
return;
}
}
WebBrowser.Tag = "EDITORSCROLL";
var uri = new Uri(editor.MarkdownDocument.HtmlRenderFilename);
if (WebBrowser.Source != null && WebBrowser.Source.Equals(uri))
{
WebBrowser.CoreWebView2.Reload();
}
else
{
WebBrowser.Source = new Uri(editor.MarkdownDocument.HtmlRenderFilename);
}
return;
}
// not a markdown or HTML document to preview
Window.ShowPreviewBrowser(true, keepScrollPosition);
}
catch (Exception ex)
{
//mmApp.Log("PreviewMarkdown failed (Exception captured - continuing)", ex);
Debug.WriteLine("PreviewMarkdown failed (Exception captured - continuing)", ex);
}
}
