cleanup

crates/epaint/src/text/font.rs

@@ -552,27 +552,35 @@ impl FontFace {
         metrics: &StyledMetrics,
         shaped: &ShapedGlyph,
     ) -> (GlyphAllocation, i32) {
-        if shaped.glyph_id == skrifa::GlyphId::NOTDEF {
-            return (GlyphAllocation::default(), shaped.h_pos as i32);
+        let ShapedGlyph {
+            glyph_id,
+            advance_width_px,
+            h_pos,
+            y_offset_points,
+            is_cjk,
+        } = *shaped;
+
+        if glyph_id == skrifa::GlyphId::NOTDEF {
+            return (GlyphAllocation::default(), h_pos.round() as i32);
         }
 
-        let (h_pos_round, bin) = if shaped.is_cjk {
-            (shaped.h_pos.round() as i32, SubpixelBin::Zero)
+        let (h_pos_round, bin) = if is_cjk {
+            (h_pos.round() as i32, SubpixelBin::Zero)
         } else {
-            SubpixelBin::new(shaped.h_pos)
+            SubpixelBin::new(h_pos)
         };
 
-        let cache_key = GlyphCacheKey::new(shaped.glyph_id, metrics, bin);
+        let cache_key = GlyphCacheKey::new(glyph_id, metrics, bin);
         if let Some(cached) = self.glyph_alloc_cache.get(&cache_key) {
             let mut alloc = *cached;
-            alloc.advance_width_px = shaped.advance_width_px;
-            alloc.uv_rect.offset.y += shaped.y_offset_points;
+            alloc.advance_width_px = advance_width_px;
+            alloc.uv_rect.offset.y += y_offset_points;
             return (alloc, h_pos_round);
         }
 
         let glyph_info = GlyphInfo {
-            id: Some(shaped.glyph_id),
-            advance_width_unscaled: OrderedFloat(shaped.advance_width_px / metrics.px_scale_factor),
+            id: Some(glyph_id),
+            advance_width_unscaled: OrderedFloat(advance_width_px / metrics.px_scale_factor),
         };
 
         let mut allocation = self
@@ -585,33 +593,30 @@ impl FontFace {
 
         // Apply shaper y_offset after caching — the offset varies per call site
         // so we cache the base allocation without it.
-        allocation.uv_rect.offset.y += shaped.y_offset_points;
+        allocation.uv_rect.offset.y += y_offset_points;
 
         (allocation, h_pos_round)
     }
 }
 
-/// A contiguous run of text that maps to a single font face.
-///
-/// Glyph positioning info from the text shaper, ready for allocation.
+/// Positioning info for a single glyph, ready for atlas allocation.
+#[derive(Clone, Copy, Debug)]
 pub(crate) struct ShapedGlyph {
     pub glyph_id: skrifa::GlyphId,
+
+    /// How far the cursor advances after this glyph, in physical pixels.
     pub advance_width_px: f32,
+
+    /// Horizontal position of the glyph origin, in physical pixels.
     pub h_pos: f32,
+
+    /// Vertical offset from the baseline, in UI points.
     pub y_offset_points: f32,
+
+    /// CJK glyphs skip subpixel positioning to save atlas space.
     pub is_cjk: bool,
 }
 
-/// Produced by [`Font::segment_into_runs`] for text shaping.
-#[derive(Debug)]
-pub(crate) struct TextRun {
-    /// Which font face should shape this run.
-    pub font_key: FontFaceKey,
-
-    /// Byte range within the section text.
-    pub byte_range: std::ops::Range<usize>,
-}
-
 // TODO(emilk): rename?
 /// Wrapper over multiple [`FontFace`] (e.g. a primary + fallbacks for emojis)
 pub struct Font<'a> {

crates/epaint/src/text/text_layout.rs

@@ -7,13 +7,16 @@ use emath::{Align, GuiRounding as _, NumExt as _, Pos2, Rect, Vec2, pos2, vec2};
 use crate::{
     Color32, Mesh, Stroke, Vertex,
     stroke::PathStroke,
-    text::font::{StyledMetrics, is_cjk, is_cjk_break_allowed},
+    text::{
+        font::{StyledMetrics, is_cjk, is_cjk_break_allowed},
+        fonts::FontFaceKey,
+    },
 };
 
 use super::{
     FontsImpl, Galley, Glyph, LayoutJob, LayoutSection, PlacedRow, Row, RowVisuals,
     VariationCoords,
-    font::{Font, FontFace, TextRun},
+    font::{Font, FontFace},
 };
 
 // ----------------------------------------------------------------------------
@@ -178,6 +181,16 @@ struct ShapingContext {
     prev_cluster: Option<u32>,
 }
 
+/// Produced by [`Font::segment_into_runs`] for text shaping.
+#[derive(Debug)]
+struct TextRun {
+    /// Which font face should shape this run.
+    pub font_key: FontFaceKey,
+
+    /// Byte range within the section text.
+    pub byte_range: std::ops::Range<usize>,
+}
+
 /// Emit shaped glyphs from a [`harfrust::GlyphBuffer`] into a [`Paragraph`].
 fn layout_shaped_run(
     font: &mut Font<'_>,
@@ -355,7 +368,7 @@ fn layout_section(
 
     // Process each paragraph segment (split on newlines — the shaper can't handle them).
     for (seg_idx, segment) in SplitOrWhole::new(section_text, job.break_on_newline).enumerate() {
-        if seg_idx > 0 {
+        if 0 < seg_idx {
             out_paragraphs.push(Paragraph::from_section_index(section_index));
             paragraph = out_paragraphs.last_mut().unwrap();
             paragraph.empty_paragraph_height = line_height;