Enable PDF files in preview pane (#9088)

## Summary of the Pull Request This PR enables user to preview PDF files in the Explorer preview pane and in Outlook. **What is this about:** Windows does not support out of the box experience for previewing PDF files in the preview pane. Users need to install third-party software like Adobe Acrobat reader. The PdfPreviewHandler module enbales the user to preview PDF files. **How does someone test / validate:** Run the installer, open Explorer and select a PDF file, enable the preview pane. Maybe need to remove third-party PDF software. ## Quality Checklist - [X] **Linked issue:** #3548 - [ ] **Communication:** I've discussed this with core contributors in the issue. - [X] **Tests:** Added/updated and all pass - [X] **Installer:** Added/updated and all pass - [X] **Localization:** All end user facing strings can be localized - [ ] **Docs:** Added/ updated - [x] **Binaries:** Any new files are added to WXS / YML - [ ] No new binaries - [x] YML for signing - [x] WXS for installer
2026-04-05 10:46:33 +02:00 · 2021-08-26 23:43:26 +02:00
parent da46b90457
commit 4177708e49
34 changed files with 1073 additions and 14 deletions
--- a/src/modules/previewpane/UnitTests-MarkdownPreviewHandler/HTMLParsingExtensionTest.cs
+++ b/src/modules/previewpane/UnitTests-MarkdownPreviewHandler/HTMLParsingExtensionTest.cs
@@ -0,0 +1,104 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Markdig;
+using Microsoft.PowerToys.PreviewHandler.Markdown;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace PreviewPaneUnitTests
+{
+    [TestClass]
+    public class HTMLParsingExtensionTest
+    {
+        private static MarkdownPipeline BuidPipeline(IMarkdownExtension extension)
+        {
+            MarkdownPipelineBuilder pipelineBuilder = new MarkdownPipelineBuilder().UseAdvancedExtensions();
+            pipelineBuilder.Extensions.Add(extension);
+
+            return pipelineBuilder.Build();
+        }
+
+        [TestMethod]
+        public void ExtensionUpdatesTablesClassWhenUsed()
+        {
+            // Arrange
+            string mdString = "| A | B |\n| -- | -- | ";
+            HTMLParsingExtension htmlParsingExtension = new HTMLParsingExtension(() => { });
+            MarkdownPipeline markdownPipeline = BuidPipeline(htmlParsingExtension);
+
+            // Act
+            string html = Markdown.ToHtml(mdString, markdownPipeline);
+
+            // Assert
+            const string expected = "<table class=\"table table-striped table-bordered\">\n<thead>\n<tr>\n<th>A</th>\n<th>B</th>\n</tr>\n</thead>\n</table>\n";
+            Assert.AreEqual(expected, html);
+        }
+
+        [TestMethod]
+        public void ExtensionUpdatesBlockQuotesClassWhenUsed()
+        {
+            // Arrange
+            string mdString = "> Blockquotes.";
+            HTMLParsingExtension htmlParsingExtension = new HTMLParsingExtension(() => { });
+            MarkdownPipeline markdownPipeline = BuidPipeline(htmlParsingExtension);
+
+            // Act
+            string html = Markdown.ToHtml(mdString, markdownPipeline);
+
+            // Assert
+            const string expected = "<blockquote class=\"blockquote\">\n<p>Blockquotes.</p>\n</blockquote>\n";
+            Assert.AreEqual(expected, html);
+        }
+
+        [TestMethod]
+        public void ExtensionUpdatesFigureClassAndBlocksRelativeUrlWhenUsed()
+        {
+            // arrange
+            string mdString = "![text](a.jpg \"Figure\")";
+            HTMLParsingExtension htmlParsingExtension = new HTMLParsingExtension(() => { }, "C:\\Users\\");
+            MarkdownPipeline markdownPipeline = BuidPipeline(htmlParsingExtension);
+
+            // Act
+            string html = Markdown.ToHtml(mdString, markdownPipeline);
+
+            // Assert
+            const string expected = "<p><img src=\"#\" class=\"img-fluid\" alt=\"text\" title=\"Figure\" /></p>\n";
+            Assert.AreEqual(expected, html);
+        }
+
+        [TestMethod]
+        public void ExtensionAddsClassToFigureCaptionWhenUsed()
+        {
+            // arrange
+            string mdString = "^^^ This is a caption";
+            HTMLParsingExtension htmlParsingExtension = new HTMLParsingExtension(() => { }, "C:/Users/");
+            MarkdownPipeline markdownPipeline = BuidPipeline(htmlParsingExtension);
+
+            // Act
+            string html = Markdown.ToHtml(mdString, markdownPipeline);
+
+            // Assert
+            const string expected = "<figure class=\"figure\">\n<figcaption class=\"figure-caption\">This is a caption</figcaption>\n</figure>\n";
+            Assert.AreEqual(expected, html);
+        }
+
+        [TestMethod]
+        public void ExtensionRemovesExternalImageUrlAndMakeCallbackWhenUsed()
+        {
+            // arrange
+            int count = 0;
+            string mdString = "![text](http://dev.nodeca.com \"Figure\")";
+            HTMLParsingExtension htmlParsingExtension = new HTMLParsingExtension(() => { count++; });
+            MarkdownPipeline markdownPipeline = BuidPipeline(htmlParsingExtension);
+
+            // Act
+            string html = Markdown.ToHtml(mdString, markdownPipeline);
+
+            // Assert
+            Assert.AreEqual(1, count);
+            const string expected = "<p><img src=\"#\" class=\"img-fluid\" alt=\"text\" title=\"Figure\" /></p>\n";
+            Assert.AreEqual(expected, html);
+        }
+    }
+}