Extract HTML fixtures out of the FormattedBoxyText previews.

ElementX/Sources/Other/HTMLParsing/HTMLFixtures.swift

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+//
+// Copyright 2025 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+// Please see LICENSE files in the repository root for full details.
+//
+
+enum HTMLFixtures: String, CaseIterable {
+    case plainText
+    case headers
+    case paragraphs
+    case matrixIdentifiers
+    case links
+    case textFormatting
+    case blockQuotes
+    case codeBlocks
+    case unorderedList
+    case orderedList
+    
+    var rawValue: String {
+        switch self {
+        case .plainText:
+            """
+            Nothing is as permanent as a temporary solution that works. 
+            Experience is the name everyone gives to their mistakes. 
+            If debugging is the process of removing bugs, then programming must be the process of putting them in.
+            """
+        case .headers:
+            """
+            <h1>H1 Header</h1></br>
+            <h2>H2 Header</h2></br>
+            <h3>H3 Header</h3></br>
+            <h4>H4 Header</h4></br>
+            <h5>H5 Header</h5></br>
+            <h6>H6 Header</h6>
+            """
+        case .paragraphs:
+            """
+            <p>This is a paragraph.</p><p>And this is another one.</p>
+            <div>And this is a division.</div>
+            New lines are ignored.\n\nLike so.</br>
+            But this line comes after a line break.</br>
+            """
+        case .matrixIdentifiers:
+            """
+            We expect various identifiers to be (partially) detected:</br>
+            !room:matrix.org, #room:matrix.org, $event:matrix.org, @user:matrix.org</br>
+            matrix://roomid/room:matrix.org, matrix://r/room:matrix.org, matrix://roomid/room:matrix.org/e/event:matrix.org, matrix://roomid/room:matrix.org/u/user:matrix.org</br>
+            """
+        case .links:
+            """
+            Links too:</br><a href=\"https://www.matrix.org/\">Matrix rules! 🤘</a>, matrix.org, www.matrix.org, http://matrix.org
+            """
+        case .textFormatting:
+            """
+            <b>Text</b> <i>formatting</i> <u>should</u> <s>work</s> properly.</br>
+            <strong>Text</strong> <em>formatting</em> does <del>work!</del>.</br>
+            <b>And <i>mixed</i></b> <em><s>formatting</s></em> <del><strong>works</strong></del> <u><b>too!!1!</b></u>.
+            <br>
+            <sup>Thumbs</sup> if you liked it, <sub>sub</sub> if you loved it!
+            """
+        case .blockQuotes:
+            """
+            <blockquote>First blockquote with a <a href=\"https://www.matrix.org/\">link</a> in it</blockquote>
+            <blockquote>Second blockquote with a <a href=\"https://www.matrix.org/\">link</a> in it</blockquote>
+            <blockquote>Third blockquote with a <a href=\"https://www.matrix.org/\">link</a> in it</blockquote>
+            """
+        case .codeBlocks:
+            """
+            <pre>A preformatted code block<code>struct ContentView: View {
+                var body: some View {
+                    VStack {
+                        Text("Knock, knock!")
+                            .padding()
+                            .background(Color.yellow, in: RoundedRectangle(cornerRadius: 8))
+                        Text("Who's there?")
+                    }
+                    .padding()
+                }
+            }</code></pre></br>
+            Followed by some plain code blocks</br>
+            <code>Hello, world!</code>
+            <code><b>Hello</b>, <i>world!</i></code>
+            <code><b>Hello</b>, <a href="https://www.matrix.org">world!</a></code>
+            """
+        case .unorderedList:
+            """
+            This is an unordered list
+            <ul>
+            <li>Jones’ <b>Crumpets</b></li>
+            <li><i>Crumpetorium</i></li>
+            <li>Village <u>Bakery</u></li>
+            </ul>
+            """
+        case .orderedList:
+            """
+            This is an ordered list
+            <ol>
+            <li>Jelly Belly</li>
+            <li>Starburst</li>
+            <li>Skittles</li>
+            </ol>
+            """
+        }
+    }
+}