feat(image): implement svg_min

Author: Brooooooklyn

.gitignore

@@ -14,4 +14,7 @@ Cargo.lock
 .turbo
 *.tsbuildinfo
 optimized-lossless.*
+optimized.svg
 quantized.png
+lib
+dist

optimize-test.js

@@ -1,11 +1,66 @@
 const { readFileSync, writeFileSync } = require('fs')
 
-const { losslessCompressPng, compressJpeg, pngQuantize } = require('./packages/binding')
+const { losslessCompressPng, compressJpeg, pngQuantize, svgMin } = require('./packages/binding')
 
 const PNG = readFileSync('./un-optimized.png')
+const SVG = `<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 width="489.589px" height="489.589px" viewBox="0 0 489.589 489.589" style="enable-background:new 0 0 489.589 489.589;"
+	 xml:space="preserve">
+<g>
+	<g>
+		<path d="M484.536,30.412c-1.034,3.078-2.545,6.233-4.652,9.279c-7.39,10.654-18.507,15.733-24.838,11.343
+			c-3.896-2.707-5.046-8.383-3.635-14.827c-6.448,1.404-12.127,0.258-14.836-3.645c-4.384-6.324,0.701-17.44,11.35-24.832
+			c3.041-2.108,6.199-3.625,9.28-4.652l-1.698-1.687L427.246,0l-10.531,10.545c0.204,12.864-5.843,27.475-17.549,39.17
+			c-11.698,11.7-26.305,17.751-39.177,17.544l-0.705,0.709c7.942,9.993,5.113,26.908-6.645,39.649l-97.701,99.254
+			c-16.212-1.154-40.134-7.153-48.211-15.222c-15.333-15.333-3.178-38.175,25.773-48.339c12.693-4.462,31.346-12.728,48.71-17.909
+			l-95.248-0.21l-25.812,109.717l-79.421-17.376L0.782,363.311l90.57-47.548l-1.03,1.026c3.675,1.671,7.206,3.45,10.614,5.289
+			c-7.065,8.54-6.696,21.16,1.305,29.154l36.904,36.9c8.421,8.432,22.019,8.464,30.529,0.185c3.274,5.55,4.829,8.984,4.829,8.984
+			l2.136-2.132l-49.56,94.419l145.77-79.928l-17.895-81.815l108.21-25.455l-0.204-94.904c-5.186,17.288-13.397,35.814-17.833,48.445
+			c-10.167,28.95-33.014,41.093-48.338,25.776c-7.979-7.987-13.914-31.387-15.156-47.634l99.048-100.611
+			c12.819-11.066,29.378-13.393,38.992-5.171c-0.673-13.188,5.422-28.427,17.532-40.539c12.712-12.711,28.85-18.755,42.467-17.334
+			l9.137-9.137L487.43,33.31L484.536,30.412z"/>
+	</g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+</svg>
+`
 
 writeFileSync('optimized-lossless.png', losslessCompressPng(PNG))
 
 writeFileSync('quantized.png', pngQuantize(PNG))
 
 writeFileSync('optimized-lossless.jpg', compressJpeg(readFileSync('./un-optimized.jpg')))
+
+writeFileSync('optimized.svg', svgMin(SVG))

packages/binding/Cargo.toml

@@ -17,6 +17,8 @@ libc = "0.2"
 lodepng = "3"
 napi = {version = "2", default-features = false, features = ["napi3"]}
 napi-derive = {version = "2", default-features = false, features = ["type-def"]}
+usvg = {version = "0.20", features = ["export"]}
+xmlwriter = "0.1"
 
 [dependencies.oxipng]
 default-features = false

packages/binding/index.d.ts

@@ -71,3 +71,16 @@ export interface PngQuantOptions {
   posterization?: number | undefined | null
 }
 export function pngQuantize(input: Buffer, options?: PngQuantOptions | undefined | null): Buffer
+export const enum Ident {
+  None = 0,
+  Two = 2,
+  Four = 4,
+  Tab = 5
+}
+export interface SvgMinOptions {
+  idPrefix?: string | undefined | null
+  useSingleQuote?: boolean | undefined | null
+  indent?: Ident | undefined | null
+  attributesIndent?: Ident | undefined | null
+}
+export function svgMin(input: string | Buffer, options?: SvgMinOptions | undefined | null): string

packages/binding/index.js

@@ -221,8 +221,10 @@ if (!nativeBinding) {
   throw new Error(`Failed to load native binding`)
 }
 
-const { losslessCompressPng, compressJpeg, pngQuantize } = nativeBinding
+const { losslessCompressPng, compressJpeg, pngQuantize, Ident, svgMin } = nativeBinding
 
 module.exports.losslessCompressPng = losslessCompressPng
 module.exports.compressJpeg = compressJpeg
 module.exports.pngQuantize = pngQuantize
+module.exports.Ident = Ident
+module.exports.svgMin = svgMin

packages/binding/src/lib.rs

@@ -260,3 +260,77 @@ pub fn png_quantize(input: Buffer, options: Option<PngQuantOptions>) -> Result<B
     })?;
   Ok(output.into())
 }
+
+#[napi]
+pub enum Ident {
+  None,
+  Two = 2,
+  Four = 4,
+  Tab,
+}
+
+#[napi(object)]
+pub struct SvgMinOptions {
+  pub id_prefix: Option<String>,
+  pub use_single_quote: Option<bool>,
+  pub indent: Option<Ident>,
+  pub attributes_indent: Option<Ident>,
+}
+
+#[inline(always)]
+fn ident_to_xml_ident(id: &Ident) -> xmlwriter::Indent {
+  match id {
+    &Ident::None => xmlwriter::Indent::None,
+    &Ident::Two => xmlwriter::Indent::Spaces(2),
+    &Ident::Four => xmlwriter::Indent::Spaces(4),
+    &Ident::Tab => xmlwriter::Indent::Tabs,
+  }
+}
+
+#[napi]
+pub fn svg_min(input: Either<String, Buffer>, options: Option<SvgMinOptions>) -> Result<String> {
+  let (tree, len) = match &input {
+    Either::A(s) => {
+      usvg::Tree::from_str(s.as_str(), &usvg::Options::default().to_ref()).map(|t| (t, s.len()))
+    }
+    Either::B(b) => {
+      usvg::Tree::from_data(b.as_ref(), &usvg::Options::default().to_ref()).map(|t| (t, b.len()))
+    }
+  }
+  .map_err(|err| {
+    Error::new(
+      Status::InvalidArg,
+      format!("Parse svg from input data failed {}", err),
+    )
+  })?;
+  let options = options.unwrap_or(SvgMinOptions {
+    id_prefix: None,
+    use_single_quote: Some(true),
+    indent: Some(Ident::None),
+    attributes_indent: Some(Ident::None),
+  });
+  let result = tree.to_string(&usvg::XmlOptions {
+    id_prefix: options.id_prefix,
+    writer_opts: xmlwriter::Options {
+      use_single_quote: options.use_single_quote.unwrap_or(true),
+      indent: options
+        .indent
+        .as_ref()
+        .map(ident_to_xml_ident)
+        .unwrap_or(xmlwriter::Indent::None),
+      attributes_indent: options
+        .attributes_indent
+        .as_ref()
+        .map(ident_to_xml_ident)
+        .unwrap_or(xmlwriter::Indent::None),
+    },
+  });
+  if result.len() < len {
+    Ok(result)
+  } else {
+    Ok(match input {
+      Either::A(a) => a,
+      Either::B(b) => unsafe { String::from_utf8_unchecked(b.to_vec()) },
+    })
+  }
+}