/// <summary> /// Creates a set of BlogTemplateFiles using a specific region locator strategy. /// </summary> /// <param name="progress"></param> /// <param name="regionLocatorStrategy"></param> /// <param name="templateStrategies"></param> /// <param name="templateTypes"></param> /// <returns></returns> private BlogEditingTemplateFile[] GetBlogTemplateFiles(IProgressHost progress, BlogPostRegionLocatorStrategy regionLocatorStrategy, BlogEditingTemplateStrategy[] templateStrategies, BlogEditingTemplateType[] templateTypes) { BlogEditingTemplateFile[] blogTemplateFiles = null; try { regionLocatorStrategy.PrepareRegions(new ProgressTick(progress, 25, 100)); ArrayList templateFiles = new ArrayList(); ProgressTick tick = new ProgressTick(progress, 50, 100); for (int i = 0; i < templateTypes.Length; i++) { ProgressTick parseTick = new ProgressTick(tick, 1, templateTypes.Length); try { CheckCancelRequested(parseTick); templateStrategy = templateStrategies[i]; // Parse the blog post HTML into an editing template. // Note: we can't use MarkupServices to parse the document from a non-UI thread, // so we have to execute the parsing portion of the template download operation on the UI thread. string editingTemplate = ParseWebpageIntoEditingTemplate_OnUIThread(_parentControl, regionLocatorStrategy, new ProgressTick(parseTick, 1, 5)); // check for cancel CheckCancelRequested(parseTick); string baseUrl = HTMLDocumentHelper.GetBaseUrl(editingTemplate, _blogHomepageUrl); // Download the template stylesheets and embedded resources (this lets the editing template load faster..and works offline!) string templateFile = DownloadTemplateFiles(editingTemplate, baseUrl, new ProgressTick(parseTick, 4, 5)); templateFiles.Add(new BlogEditingTemplateFile(templateTypes[i], templateFile)); } catch (Exception e) { Trace.WriteLine(String.Format(CultureInfo.CurrentCulture, "Failed to download template {0}: {1}", templateTypes[i].ToString(), e.ToString())); } } if (templateFiles.Count > 0) blogTemplateFiles = (BlogEditingTemplateFile[])templateFiles.ToArray(typeof(BlogEditingTemplateFile)); } finally { regionLocatorStrategy.CleanupRegions(new ProgressTick(progress, 25, 100)); } return blogTemplateFiles; }
/// <summary> /// /// </summary> /// <param name="progress"></param> /// <param name="targetTemplateTypes"></param> /// <param name="templateStrategies">equivalent strategies for manipulating the blog homepage DOM into an editing template type</param> /// <returns></returns> private BlogEditingTemplateFile[] DetectTemplates(IProgressHost progress, BlogEditingTemplateType[] targetTemplateTypes, BlogEditingTemplateStrategy[] templateStrategies) { RecentPostRegionLocatorStrategy recentPostLocatorStrategy = new RecentPostRegionLocatorStrategy(_blogClient, _blogAccount, _credentials, _blogHomepageUrl, new PageDownloader(RequestPageDownload)); TemporaryPostRegionLocatorStrategy tempPostLocatorStrategy = new TemporaryPostRegionLocatorStrategy(_blogClient, _blogAccount, _credentials, _blogHomepageUrl, new PageDownloader(RequestPageDownload), new BlogPostRegionLocatorBooleanCallback(recentPostLocatorStrategy.HasBlogPosts)); //setup the strategies for locating the title/body regions in the blog homepage. BlogPostRegionLocatorStrategy[] regionLocatorStrategies = new BlogPostRegionLocatorStrategy[] { recentPostLocatorStrategy, tempPostLocatorStrategy }; // template files to return BlogEditingTemplateFile[] blogTemplateFiles = null; // try each strategy as necessary for (int i = 0; i < regionLocatorStrategies.Length && blogTemplateFiles == null; i++) { CheckCancelRequested(progress); //reset the progress for each iteration BlogPostRegionLocatorStrategy regionLocatorStrategy = regionLocatorStrategies[i]; try { blogTemplateFiles = GetBlogTemplateFiles(progress, regionLocatorStrategy, templateStrategies, targetTemplateTypes); progress.UpdateProgress(100, 100); //if any exception occured along the way, clear them since one of the template strategies //was successful. _exception = null; } catch (OperationCancelledException) { // cancel just means our template will be String.Empty _exception = null; } catch (BlogClientOperationCancelledException e) { // cancel just means our template will be String.Empty // (setting this exception here means that at least the user // will be notified that they won't be able to edit with style) _exception = e; } catch (WebException e) { _exception = e; Trace.WriteLine("Error occurred while downloading weblog style: " + e.ToString()); if (e.Response != null) { Trace.WriteLine(String.Format(CultureInfo.InvariantCulture, "Blogpost homepage request failed: {0}", _blogHomepageUrl)); //Debug.WriteLine(HttpRequestHelper.DumpResponse((HttpWebResponse)e.Response)); } } catch (Exception e) { _exception = e; Trace.WriteLine("Error occurred while downloading weblog style: " + e.ToString()); } } // return the detected tempaltes return blogTemplateFiles; }