🎉 Add text solid strokes (#6384)

* 🎉 Add text strokes

* 🔧 Minor refactor

render-wasm/src/render.rs

@@ -350,15 +350,32 @@ impl RenderState {
                     }
                 }
             }
+
             Type::Text(text_content) => {
                 self.surfaces.apply_mut(&[SurfaceId::Fills], |s| {
                     s.canvas().concat(&matrix);
                 });
 
-                let paragraphs = text_content.to_skia_paragraphs(&self.fonts.font_collection());
+                let paragraphs = text_content.get_skia_paragraphs(&self.fonts.font_collection());
 
                 shadows::render_text_drop_shadows(self, &shape, &paragraphs, antialias);
                 text::render(self, &shape, &paragraphs, None, None);
+
+                for stroke in shape.strokes().rev() {
+                    let stroke_paints = shape.get_text_stroke_paint(&stroke);
+                    let stroke_paragraphs = text_content
+                        .get_skia_stroke_paragraphs(&self.fonts.font_collection(), &stroke_paints);
+                    shadows::render_text_drop_shadows(self, &shape, &stroke_paragraphs, antialias);
+                    text::render(
+                        self,
+                        &shape,
+                        &stroke_paragraphs,
+                        Some(SurfaceId::Strokes),
+                        None,
+                    );
+                    shadows::render_text_inner_shadows(self, &shape, &stroke_paragraphs, antialias);
+                }
+
                 shadows::render_text_inner_shadows(self, &shape, &paragraphs, antialias);
             }
             _ => {

render-wasm/src/render/shadows.rs

@@ -86,7 +86,7 @@ pub fn render_stroke_inner_shadows(
 pub fn render_text_drop_shadows(
     render_state: &mut RenderState,
     shape: &Shape,
-    paragraphs: &[Paragraph],
+    paragraphs: &[Vec<Paragraph>],
     antialias: bool,
 ) {
     for shadow in shape.drop_shadows().rev().filter(|s| !s.hidden()) {
@@ -98,7 +98,7 @@ pub fn render_text_drop_shadow(
     render_state: &mut RenderState,
     shape: &Shape,
     shadow: &Shadow,
-    paragraphs: &[Paragraph],
+    paragraphs: &[Vec<Paragraph>],
     antialias: bool,
 ) {
     let paint = &shadow.get_drop_shadow_paint(antialias);
@@ -115,7 +115,7 @@ pub fn render_text_drop_shadow(
 pub fn render_text_inner_shadows(
     render_state: &mut RenderState,
     shape: &Shape,
-    paragraphs: &[Paragraph],
+    paragraphs: &[Vec<Paragraph>],
     antialias: bool,
 ) {
     for shadow in shape.inner_shadows().rev().filter(|s| !s.hidden()) {
@@ -127,7 +127,7 @@ pub fn render_text_inner_shadow(
     render_state: &mut RenderState,
     shape: &Shape,
     shadow: &Shadow,
-    paragraphs: &[Paragraph],
+    paragraphs: &[Vec<Paragraph>],
     antialias: bool,
 ) {
     let paint = &shadow.get_inner_shadow_paint(antialias);

render-wasm/src/render/text.rs

@@ -4,11 +4,10 @@ use skia_safe::{self as skia, canvas::SaveLayerRec, paint, textlayout::Paragraph
 pub fn render(
     render_state: &mut RenderState,
     shape: &Shape,
-    paragraphs: &[Paragraph],
+    paragraphs: &[Vec<Paragraph>],
     surface_id: Option<SurfaceId>,
     paint: Option<&paint::Paint>,
 ) {
-    let mut offset_y = 0.0;
     let default_paint = skia::Paint::default();
     let mask = SaveLayerRec::default().paint(&paint.unwrap_or(&default_paint));
     let canvas = render_state
@@ -16,10 +15,13 @@ pub fn render(
         .canvas(surface_id.unwrap_or(SurfaceId::Fills));
 
     canvas.save_layer(&mask);
-    for skia_paragraph in paragraphs {
+    for group in paragraphs {
+        let mut offset_y = 0.0;
+        for skia_paragraph in group {
             let xy = (shape.selrect().x(), shape.selrect.y() + offset_y);
             skia_paragraph.paint(canvas, xy);
             offset_y += skia_paragraph.height();
         }
+    }
     canvas.restore();
 }

render-wasm/src/shapes.rs

@@ -1,4 +1,4 @@
-use skia_safe::{self as skia};
+use skia_safe::{self as skia, paint::Paint};
 
 use crate::render::BlendMode;
 use crate::uuid::Uuid;
@@ -811,6 +811,60 @@ impl Shape {
     pub fn has_fills(&self) -> bool {
         !self.fills.is_empty()
     }
+
+    pub fn get_text_stroke_paint(&self, stroke: &Stroke) -> Vec<Paint> {
+        let mut paints = Vec::new();
+
+        match stroke.kind {
+            StrokeKind::InnerStroke => {
+                let mut paint = skia::Paint::default();
+                paint.set_blend_mode(skia::BlendMode::DstOver);
+                paint.set_anti_alias(true);
+                paints.push(paint);
+
+                let mut paint = skia::Paint::default();
+                paint.set_style(skia::PaintStyle::Stroke);
+                paint.set_blend_mode(skia::BlendMode::SrcATop);
+                paint.set_anti_alias(true);
+                paint.set_stroke_width(stroke.width * 2.0);
+                paint.set_color(match &stroke.fill {
+                    Fill::Solid(color) => *color,
+                    _ => Color::BLACK,
+                });
+                paints.push(paint);
+            }
+            StrokeKind::CenterStroke => {
+                let mut paint = skia::Paint::default();
+                paint.set_style(skia::PaintStyle::Stroke);
+                paint.set_anti_alias(true);
+                paint.set_stroke_width(stroke.width);
+                paint.set_color(match &stroke.fill {
+                    Fill::Solid(color) => *color,
+                    _ => Color::BLACK,
+                });
+                paints.push(paint);
+            }
+            StrokeKind::OuterStroke => {
+                let mut paint = skia::Paint::default();
+                paint.set_style(skia::PaintStyle::Stroke);
+                paint.set_blend_mode(skia::BlendMode::DstOver);
+                paint.set_anti_alias(true);
+                paint.set_stroke_width(stroke.width * 2.0);
+                paint.set_color(match &stroke.fill {
+                    Fill::Solid(color) => *color,
+                    _ => Color::BLACK,
+                });
+                paints.push(paint);
+
+                let mut paint = skia::Paint::default();
+                paint.set_blend_mode(skia::BlendMode::Clear);
+                paint.set_anti_alias(true);
+                paints.push(paint);
+            }
+        }
+
+        paints
+    }
 }
 
 /*

render-wasm/src/shapes/text.rs

@@ -4,6 +4,7 @@ use crate::{
 };
 use skia_safe::{
     self as skia,
+    paint::Paint,
     textlayout::{FontCollection, ParagraphBuilder, ParagraphStyle},
 };
 
@@ -47,32 +48,90 @@ impl TextContent {
         self.paragraphs.push(paragraph);
     }
 
-    pub fn to_paragraphs(&self, fonts: &FontCollection) -> Vec<skia::textlayout::Paragraph> {
-        self.paragraphs
+    pub fn to_paragraphs(&self, fonts: &FontCollection) -> Vec<Vec<skia::textlayout::Paragraph>> {
+        let mut paragraph_group = Vec::new();
+        let paragraphs = self
+            .paragraphs
             .iter()
             .map(|p| {
                 let paragraph_style = p.paragraph_to_style();
                 let mut builder = ParagraphBuilder::new(&paragraph_style, fonts);
                 for leaf in &p.children {
-                    let text_style = leaf.to_style(&p);
+                    let text_style = leaf.to_style(p);
                     let text = leaf.apply_text_transform(p.text_transform);
-
                     builder.push_style(&text_style);
                     builder.add_text(&text);
                     builder.pop();
                 }
                 builder.build()
             })
+            .collect();
+        paragraph_group.push(paragraphs);
+        paragraph_group
+    }
+
+    pub fn to_stroke_paragraphs(
+        &self,
+        fonts: &FontCollection,
+        stroke_paints: &Vec<Paint>,
+    ) -> Vec<Vec<skia::textlayout::Paragraph>> {
+        let mut paragraph_group = Vec::new();
+
+        for stroke_paint in stroke_paints {
+            let mut stroke_paragraphs = Vec::new();
+            for paragraph in &self.paragraphs {
+                let paragraph_style = paragraph.paragraph_to_style();
+                let mut builder = ParagraphBuilder::new(&paragraph_style, fonts);
+                for leaf in &paragraph.children {
+                    let stroke_style = leaf.to_stroke_style(paragraph, &stroke_paint);
+                    let text: String = leaf.apply_text_transform(paragraph.text_transform);
+                    builder.push_style(&stroke_style);
+                    builder.add_text(&text);
+                    let p = builder.build();
+                    stroke_paragraphs.push(p);
+                }
+                builder.reset();
+            }
+            paragraph_group.push(stroke_paragraphs);
+        }
+        paragraph_group
+    }
+
+    pub fn get_skia_paragraphs(
+        &self,
+        fonts: &FontCollection,
+    ) -> Vec<Vec<skia::textlayout::Paragraph>> {
+        self.to_paragraphs(fonts)
+            .into_iter()
+            .map(|group| {
+                group
+                    .into_iter()
+                    .map(|mut paragraph| {
+                        paragraph.layout(self.width());
+                        paragraph
+                    })
+                    .collect()
+            })
             .collect()
     }
 
-    pub fn to_skia_paragraphs(&self, fonts: &FontCollection) -> Vec<skia::textlayout::Paragraph> {
-        let mut paragraphs = Vec::new();
-        for mut skia_paragraph in self.to_paragraphs(fonts) {
-            skia_paragraph.layout(self.width());
-            paragraphs.push(skia_paragraph);
-        }
-        paragraphs
+    pub fn get_skia_stroke_paragraphs(
+        &self,
+        fonts: &FontCollection,
+        paints: &Vec<Paint>,
+    ) -> Vec<Vec<skia::textlayout::Paragraph>> {
+        self.to_stroke_paragraphs(fonts, paints)
+            .into_iter()
+            .map(|group| {
+                group
+                    .into_iter()
+                    .map(|mut paragraph| {
+                        paragraph.layout(self.width());
+                        paragraph
+                    })
+                    .collect()
+            })
+            .collect()
     }
 }
 
@@ -216,6 +275,7 @@ impl TextLeaf {
             3 => skia::textlayout::TextDecoration::OVERLINE,
             _ => skia::textlayout::TextDecoration::NO_DECORATION,
         });
+
         style.set_font_families(&[
             self.serialized_font_family(),
             default_font(),
@@ -225,6 +285,16 @@ impl TextLeaf {
         style
     }
 
+    pub fn to_stroke_style(
+        &self,
+        paragraph: &Paragraph,
+        stroke_paint: &Paint,
+    ) -> skia::textlayout::TextStyle {
+        let mut style = self.to_style(paragraph);
+        style.set_foreground_paint(stroke_paint);
+        style
+    }
+
     fn serialized_font_family(&self) -> String {
         format!("{}", self.font_family)
     }