feat: support rendering latex

PeronGH · Dec 13, 2023 · 44ae748 · 44ae748
1 parent cf3829e
commit 44ae748
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Showing 5 changed files with 131 additions and 1 deletion.
diff --git a/lib/utils/latex.dart b/lib/utils/latex.dart
@@ -0,0 +1,25 @@
+import 'package:flutter_markdown_latex/flutter_markdown_latex.dart';
+import 'package:markdown/markdown.dart';
+
+class BingLatexBlockSyntax extends LatexBlockSyntax {
+  @override
+  List<Line> parseChildLines(BlockParser parser) {
+    final childLines = super.parseChildLines(parser);
+
+    return [Line("\\begin{aligned}"), ...childLines, Line("\\end{aligned}")];
+  }
+}
+
+class BingLatexInlineSyntax extends InlineSyntax {
+  BingLatexInlineSyntax()
+      : super(r'(\\\()(?![\n])(.*?)(\\\))(?=[\s?!\.,:？！。，：]|$)');
+
+  @override
+  bool onMatch(InlineParser parser, Match match) {
+    Element element = Element.text('latex', match[2] ?? '');
+    element.attributes['displayMode'] =
+        match[1]?.length == 2 ? 'true' : 'false';
+    parser.addNode(element);
+    return true;
+  }
+}
diff --git a/lib/utils/string.dart b/lib/utils/string.dart
@@ -0,0 +1,15 @@
+extension SuffixOperation on String {
+  String removeSuffix(String suffix) {
+    if (endsWith(suffix)) {
+      return substring(0, length - suffix.length);
+    }
+    return this;
+  }
+
+  String replaceSuffix(String suffix, String replacement) {
+    if (endsWith(suffix)) {
+      return substring(0, length - suffix.length) + replacement;
+    }
+    return this;
+  }
+}
diff --git a/lib/widgets/message_tile.dart b/lib/widgets/message_tile.dart
@@ -6,8 +6,10 @@ import 'package:get/get.dart';
 import 'package:markdown/markdown.dart' as md;
 import 'package:sydney_webui/controller.dart';
 import 'package:sydney_webui/models/message.dart';
+import 'package:sydney_webui/utils/latex.dart';
 import 'package:sydney_webui/utils/url.dart';
 import 'package:sydney_webui/widgets/code_element.dart';
+import 'package:flutter_markdown_latex/flutter_markdown_latex.dart';
 
 class MessageTile extends StatelessWidget {
   const MessageTile({
@@ -140,9 +142,16 @@ class MessageTile extends StatelessWidget {
         md.MarkdownBody(
             selectable: true,
             data: message.content,
-            extensionSet: md.ExtensionSet.gitHubFlavored,
+            extensionSet: md.ExtensionSet([
+              ...md.ExtensionSet.gitHubFlavored.blockSyntaxes,
+              BingLatexBlockSyntax()
+            ], [
+              ...md.ExtensionSet.gitHubFlavored.inlineSyntaxes,
+              BingLatexInlineSyntax()
+            ]),
             builders: {
               'code': CodeElementBuilder(),
+              'latex': LatexElementBuilder(),
             }),
         ...typeSpecificContent,
         ...images

diff --git a/pubspec.lock b/pubspec.lock
@@ -126,6 +126,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.6.18+2"
+  flutter_markdown_latex:
+    dependency: "direct main"
+    description:
+      name: flutter_markdown_latex
+      sha256: fff914d779c9b30b8b261b4c087bb08b3962ac024e4c6a0a5613b5c12c17725a
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.3"
+  flutter_math_fork:
+    dependency: transitive
+    description:
+      name: flutter_math_fork
+      sha256: "94bee4642892a94939af0748c6a7de0ff8318feee588379dcdfea7dc5cba06c8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.2"
   flutter_plugin_android_lifecycle:
     dependency: transitive
     description:
@@ -134,6 +150,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.17"
+  flutter_svg:
+    dependency: transitive
+    description:
+      name: flutter_svg
+      sha256: d39e7f95621fc84376bc0f7d504f05c3a41488c562f4a8ad410569127507402c
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.9"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -248,6 +272,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.10.0"
+  nested:
+    dependency: transitive
+    description:
+      name: nested
+      sha256: "03bac4c528c64c95c722ec99280375a6f2fc708eec17c7b3f07253b626cd2a20"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
   pasteboard:
     dependency: "direct main"
     description:
@@ -264,6 +296,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.8.3"
+  path_parsing:
+    dependency: transitive
+    description:
+      name: path_parsing
+      sha256: e3e67b1629e6f7e8100b367d3db6ba6af4b1f0bb80f64db18ef1fbabd2fa9ccf
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.1"
   path_provider:
     dependency: transitive
     description:
@@ -344,6 +384,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.7.3"
+  provider:
+    dependency: transitive
+    description:
+      name: provider
+      sha256: "9a96a0a19b594dbc5bf0f1f27d2bc67d5f95957359b461cd9feb44ed6ae75096"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.1.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -397,6 +445,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.6.1"
+  tuple:
+    dependency: transitive
+    description:
+      name: tuple
+      sha256: a97ce2013f240b2f3807bcbaf218765b6f301c3eff91092bcfa23a039e7dd151
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.2"
   typed_data:
     dependency: transitive
     description:
@@ -405,6 +461,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.2"
+  vector_graphics:
+    dependency: transitive
+    description:
+      name: vector_graphics
+      sha256: "0f0c746dd2d6254a0057218ff980fc7f5670fd0fcf5e4db38a490d31eed4ad43"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.9+1"
+  vector_graphics_codec:
+    dependency: transitive
+    description:
+      name: vector_graphics_codec
+      sha256: "0edf6d630d1bfd5589114138ed8fada3234deacc37966bec033d3047c29248b7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.9+1"
+  vector_graphics_compiler:
+    dependency: transitive
+    description:
+      name: vector_graphics_compiler
+      sha256: d24333727332d9bd20990f1483af4e09abdb9b1fc7c3db940b56ab5c42790c26
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.9+1"
   vector_math:
     dependency: transitive
     description:

diff --git a/pubspec.yaml b/pubspec.yaml
@@ -39,6 +39,7 @@ dependencies:
     flutter_highlighter:
     pasteboard:
     image:
+    flutter_markdown_latex:
 
 dev_dependencies:
     flutter_test: