Inline mvp and custom override CSS when rendering RSS posts

server/src/custom.css

@@ -0,0 +1,8 @@
+pre {
+  background-color: var(--color-bg);
+  color: var(--color-text);
+}
+
+code {
+  background-color: var(--color-bg-secondary);
+}

server/src/lib.rs

@@ -13,10 +13,12 @@ use url::Url;
 
 // TODO: figure out how to use Cow
 trait Transformer {
-    fn should_run(&self, input: &str) -> bool;
-    // TODO: should input be something like `html_escape` uses:
+    fn should_run(&self, _html: &str) -> bool {
+        true
+    }
+    // TODO: should html be something like `html_escape` uses:
     // <S: ?Sized + AsRef<str>>(text: &S) -> Cow<str>
-    fn transform(&self, input: &str) -> Result<String, TransformError>;
+    fn transform(&self, html: &str) -> Result<String, TransformError>;
 }
 
 // TODO: how would we make this more generic to allow good implementations of Transformer outside
@@ -35,22 +37,50 @@ struct SanitizeHtml<'a> {
 }
 
 impl<'a> Transformer for SanitizeHtml<'a> {
-    fn should_run(&self, _input: &str) -> bool {
-        true
-    }
-    fn transform(&self, input: &str) -> Result<String, TransformError> {
-        Ok(sanitize_html(input, self.cid_prefix, self.base_url)?)
+    fn transform(&self, html: &str) -> Result<String, TransformError> {
+        Ok(sanitize_html(html, self.cid_prefix, self.base_url)?)
     }
 }
 
 struct EscapeHtml;
 
 impl Transformer for EscapeHtml {
-    fn should_run(&self, input: &str) -> bool {
-        input.starts_with("&lt")
+    fn should_run(&self, html: &str) -> bool {
+        html.starts_with("&lt")
     }
-    fn transform(&self, input: &str) -> Result<String, TransformError> {
-        Ok(html_escape::decode_html_entities(input).to_string())
+    fn transform(&self, html: &str) -> Result<String, TransformError> {
+        Ok(html_escape::decode_html_entities(html).to_string())
+    }
+}
+
+struct InlineStyle;
+
+impl Transformer for InlineStyle {
+    fn transform(&self, html: &str) -> Result<String, TransformError> {
+        let css = concat!(
+            "/* mvp.css */\n",
+            include_str!("mvp.css"),
+            "/* Xinu Specific overrides */\n",
+            include_str!("custom.css"),
+        );
+        let inline_opts = InlineOptions {
+            inline_style_tags: false,
+            keep_style_tags: false,
+            keep_link_tags: false,
+            base_url: None,
+            load_remote_stylesheets: false,
+            extra_css: Some(css.into()),
+            preallocate_node_capacity: 32,
+            ..InlineOptions::default()
+        };
+
+        Ok(match CSSInliner::new(inline_opts).inline(&html) {
+            Ok(inlined_html) => inlined_html,
+            Err(err) => {
+                error!("failed to inline CSS: {err}");
+                html.to_string()
+            }
+        })
     }
 }
 

server/src/mvp.css

@@ -1,45 +1,6 @@
 /* MVP.css v1.15 - https://github.com/andybrewer/mvp */
 
-:root {
-    --active-brightness: 0.85;
-    --border-radius: 5px;
-    --box-shadow: 2px 2px 10px;
-    --color-accent: #118bee15;
-    --color-bg: #fff;
-    --color-bg-secondary: #e9e9e9;
-    --color-link: #118bee;
-    --color-secondary: #920de9;
-    --color-secondary-accent: #920de90b;
-    --color-shadow: #f4f4f4;
-    --color-table: #118bee;
-    --color-text: #000;
-    --color-text-secondary: #999;
-    --color-scrollbar: #cacae8;
-    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
-    --hover-brightness: 1.2;
-    --justify-important: center;
-    --justify-normal: left;
-    --line-height: 1.5;
-    --width-card: 285px;
-    --width-card-medium: 460px;
-    --width-card-wide: 800px;
-    --width-content: 1080px;
-}
-
-@media (prefers-color-scheme: dark) {
-    :root[color-mode="user"] {
-        --color-accent: #0097fc4f;
-        --color-bg: #333;
-        --color-bg-secondary: #555;
-        --color-link: #0097fc;
-        --color-secondary: #e20de9;
-        --color-secondary-accent: #e20de94f;
-        --color-shadow: #bbbbbb20;
-        --color-table: #0097fc;
-        --color-text: #f7f7f7;
-        --color-text-secondary: #aaa;
-    }
-}
+/* :root content stored in client side index.html */
 
 html {
   scroll-behavior: smooth;
@@ -425,8 +386,7 @@ textarea {
 }
 
 input[type="text"],
-input[type="password"]
-textarea {
+input[type="password"] textarea {
   width: calc(100% - 1.6rem);
 }
 

server/src/newsreader.rs

@@ -14,7 +14,7 @@ const THREAD_PREFIX: &'static str = "news:";
 use crate::{
     error::ServerError,
     graphql::{Body, Email, Html, Message, Tag, Thread, ThreadSummary},
-    EscapeHtml, SanitizeHtml, Transformer,
+    EscapeHtml, InlineStyle, SanitizeHtml, Transformer,
 };
 
 pub fn is_newsreader_search(query: &str) -> bool {
@@ -213,6 +213,7 @@ pub async fn thread(pool: &PgPool, thread_id: String) -> Result<Thread, ServerEr
     // * Some sites appear to be HTML encoded, unencode them, i.e. imperialviolent
     let tranformers: Vec<Box<dyn Transformer>> = vec![
         Box::new(EscapeHtml),
+        Box::new(InlineStyle),
         Box::new(SanitizeHtml {
             cid_prefix: "",
             base_url: &link,
@@ -224,7 +225,7 @@ pub async fn thread(pool: &PgPool, thread_id: String) -> Result<Thread, ServerEr
         }
     }
     let body = Body::Html(Html {
-        html: html.to_string(),
+        html,
         content_tree: "".to_string(),
     });
     let title = r.title.unwrap_or("NO TITLE".to_string());

web/index.html

@@ -22,6 +22,48 @@
   <link rel="preconnect" href="https://fonts.googleapis.com">
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
   <link href="https://fonts.googleapis.com/css2?family=Poppins:wght@700&display=swap" rel="stylesheet">
+  <style>
+    :root {
+      --active-brightness: 0.85;
+      --border-radius: 5px;
+      --box-shadow: 2px 2px 10px;
+      --color-accent: #118bee15;
+      --color-bg: #fff;
+      --color-bg-secondary: #e9e9e9;
+      --color-link: #118bee;
+      --color-secondary: #920de9;
+      --color-secondary-accent: #920de90b;
+      --color-shadow: #f4f4f4;
+      --color-table: #118bee;
+      --color-text: #000;
+      --color-text-secondary: #999;
+      --color-scrollbar: #cacae8;
+      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
+      --hover-brightness: 1.2;
+      --justify-important: center;
+      --justify-normal: left;
+      --line-height: 1.5;
+      --width-card: 285px;
+      --width-card-medium: 460px;
+      --width-card-wide: 800px;
+      --width-content: 1080px;
+    }
+
+    @media (prefers-color-scheme: dark) {
+      :root[color-mode="user"] {
+        --color-accent: #0097fc4f;
+        --color-bg: #333;
+        --color-bg-secondary: #555;
+        --color-link: #0097fc;
+        --color-secondary: #e20de9;
+        --color-secondary-accent: #e20de94f;
+        --color-shadow: #bbbbbb20;
+        --color-table: #0097fc;
+        --color-text: #f7f7f7;
+        --color-text-secondary: #aaa;
+      }
+    }
+  </style>
 </head>
 
 <body>