hack the text_decorations to make this work

helix-term/src/ui/document.rs

@@ -216,7 +216,8 @@ pub fn render_text(
                 .unwrap_or((Style::default(), usize::MAX));
         }
 
-        let grapheme_style = if let GraphemeSource::VirtualText { highlight } = grapheme.source {
+        let mut grapheme_style = if let GraphemeSource::VirtualText { highlight } = grapheme.source
+        {
             let mut style = renderer.text_style;
             if let Some(highlight) = highlight {
                 style = style.patch(theme.highlight(highlight.0));
@@ -231,7 +232,7 @@ pub fn render_text(
                 overlay_style: overlay_style_span.0,
             }
         };
-        decorations.decorate_grapheme(renderer, &grapheme);
+        decorations.decorate_grapheme(renderer, &grapheme, &mut grapheme_style.syntax_style);
 
         let virt = grapheme.is_virtual();
         let grapheme_width = renderer.draw_grapheme(

helix-term/src/ui/editor.rs

@@ -15,6 +15,7 @@ use crate::{
 
 use helix_core::{
     diagnostic::NumberOrString,
+    doc_formatter::FormattedGrapheme,
     graphemes::{next_grapheme_boundary, prev_grapheme_boundary},
     movement::Direction,
     syntax::{self, HighlightEvent},
@@ -205,6 +206,30 @@ impl EditorView {
             inline_diagnostic_config,
             config.end_of_line_diagnostics,
         ));
+        if let Some(swatches) = doc.color_swatches(view.id) {
+            for swatch in swatches.color_swatches.clone() {
+                struct SwatchAnnotate {
+                    swatch_idx: usize,
+                }
+                impl Decoration for SwatchAnnotate {
+                    fn decorate_grapheme(
+                        &mut self,
+                        _renderer: &mut TextRenderer,
+                        _grapheme: &FormattedGrapheme,
+                        style: &mut Style,
+                    ) -> usize {
+                        style.fg = Some(Color::Rgb(4, 12, 28));
+                        usize::MAX
+                    }
+                    fn reset_pos(&mut self, _pos: usize) -> usize {
+                        self.swatch_idx
+                    }
+                }
+                decorations.add_decoration(SwatchAnnotate {
+                    swatch_idx: swatch.char_idx,
+                });
+            }
+        }
         render_document(
             surface,
             inner,

helix-term/src/ui/text_decorations.rs

@@ -2,7 +2,7 @@ use std::cmp::Ordering;
 
 use helix_core::doc_formatter::FormattedGrapheme;
 use helix_core::Position;
-use helix_view::editor::CursorCache;
+use helix_view::{editor::CursorCache, theme::Style};
 
 use crate::ui::document::{LinePos, TextRenderer};
 
@@ -81,6 +81,7 @@ pub trait Decoration {
         &mut self,
         _renderer: &mut TextRenderer,
         _grapheme: &FormattedGrapheme,
+        _style: &mut Style,
     ) -> usize {
         usize::MAX
     }
@@ -108,7 +109,12 @@ impl<'a> DecorationManager<'a> {
         }
     }
 
-    pub fn decorate_grapheme(&mut self, renderer: &mut TextRenderer, grapheme: &FormattedGrapheme) {
+    pub fn decorate_grapheme(
+        &mut self,
+        renderer: &mut TextRenderer,
+        grapheme: &FormattedGrapheme,
+        style: &mut Style,
+    ) {
         for (decoration, hook_char_idx) in &mut self.decorations {
             loop {
                 match (*hook_char_idx).cmp(&grapheme.char_idx) {
@@ -117,7 +123,7 @@ impl<'a> DecorationManager<'a> {
                         *hook_char_idx = decoration.skip_concealed_anchor(grapheme.char_idx)
                     }
                     Ordering::Equal => {
-                        *hook_char_idx = decoration.decorate_grapheme(renderer, grapheme)
+                        *hook_char_idx = decoration.decorate_grapheme(renderer, grapheme, style)
                     }
                     Ordering::Greater => break,
                 }
@@ -163,6 +169,7 @@ impl Decoration for Cursor<'_> {
         &mut self,
         renderer: &mut TextRenderer,
         grapheme: &FormattedGrapheme,
+        _style: &mut Style,
     ) -> usize {
         if renderer.column_in_bounds(grapheme.visual_pos.col, grapheme.width())
             && renderer.offset.row < grapheme.visual_pos.row

helix-term/src/ui/text_decorations/diagnostics.rs

@@ -307,6 +307,7 @@ impl Decoration for InlineDiagnostics<'_> {
         &mut self,
         renderer: &mut TextRenderer,
         grapheme: &FormattedGrapheme,
+        _style: &mut Style,
     ) -> usize {
         self.state
             .proccess_anchor(grapheme, renderer.viewport.width, renderer.offset.col)