rustdoc: use ttf based font for cjk glyphs

src/librustdoc/html/render/write_shared.rs

@@ -39,9 +39,9 @@ static FILES_UNVERSIONED: Lazy<FxHashMap<&str, &[u8]>> = Lazy::new(|| {
         "SourceCodePro-Semibold.ttf.woff" => static_files::source_code_pro::SEMIBOLD,
         "SourceCodePro-It.ttf.woff" => static_files::source_code_pro::ITALIC,
         "SourceCodePro-LICENSE.txt" => static_files::source_code_pro::LICENSE,
-        "noto-sans-kr-regular.woff2" => static_files::noto_sans_kr::REGULAR2,
-        "noto-sans-kr-regular.woff" => static_files::noto_sans_kr::REGULAR,
-        "noto-sans-kr-LICENSE.txt" => static_files::noto_sans_kr::LICENSE,
+        "NanumBarunGothic.ttf.woff2" => static_files::nanum_barun_gothic::REGULAR2,
+        "NanumBarunGothic.ttf.woff" => static_files::nanum_barun_gothic::REGULAR,
+        "NanumBarunGothic-LICENSE.txt" => static_files::nanum_barun_gothic::LICENSE,
         "LICENSE-MIT.txt" => static_files::LICENSE_MIT,
         "LICENSE-APACHE.txt" => static_files::LICENSE_APACHE,
         "COPYRIGHT.txt" => static_files::COPYRIGHT,

src/librustdoc/html/static/css/rustdoc.css

@@ -77,11 +77,11 @@
 
 /* Avoid using legacy CJK serif fonts in Windows like Batang. */
 @font-face {
-	font-family: 'Noto Sans KR';
-	src: url("noto-sans-kr-regular.woff2") format("woff2"),
-		url("noto-sans-kr-regular.woff") format("woff");
+	font-family: 'NanumBarunGothic';
+	src: url("NanumBarunGothic.ttf.woff2") format("woff2"),
+		url("NanumBarunGothic.ttf.woff") format("woff");
 	font-display: swap;
-	unicode-range: U+AC00-D7AF, U+3130-318F, U+1100-11FF, U+A960-A97F, U+D7B0-D7FF;
+	unicode-range: U+AC00-D7AF, U+1100-11FF, U+3130-318F, U+A960-A97F, U+D7B0-D7FF;
 }
 
 * {
@@ -108,7 +108,7 @@ html {
 /* General structure and fonts */
 
 body {
-	font: 16px/1.4 "Source Serif 4", "Noto Sans KR", serif;
+	font: 16px/1.4 "Source Serif 4", NanumBarunGothic, serif;
 	margin: 0;
 	position: relative;
 	padding: 10px 15px 20px 15px;
@@ -197,7 +197,7 @@ div.impl-items > div:not(.docblock):not(.item-info),
 .content ul.crate a.crate, a.srclink,
 /* This selector is for the items listed in the "all items" page. */
 #main > ul.docblock > li > a {
-	font-family: "Fira Sans", Arial, sans-serif;
+	font-family: "Fira Sans", Arial, NanumBarunGothic, sans-serif;
 }
 
 .content ul.crate a.crate {

src/librustdoc/html/static/fonts/noto-sans-kr-LICENSE.txt → src/librustdoc/html/static/fonts/NanumBarunGothic-LICENSE.txt

@@ -1,8 +1,14 @@
-Copyright 2014, 2015 Adobe Systems Incorporated (http://www.adobe.com/), with Reserved Font Name 'Source'. All Rights Reserved. Source is a trademark of Adobe Systems Incorporated in the United States and/or other countries.
+Copyright (c) 2010, NAVER Corporation (https://www.navercorp.com/),
 
-This Font Software is licensed under the SIL Open Font License, Version 1.1.
+with Reserved Font Name Nanum, Naver Nanum, NanumGothic, Naver NanumGothic,
+NanumMyeongjo, Naver NanumMyeongjo, NanumBrush, Naver NanumBrush, NanumPen,
+Naver NanumPen, Naver NanumGothicEco, NanumGothicEco, Naver NanumMyeongjoEco,
+NanumMyeongjoEco, Naver NanumGothicLight, NanumGothicLight, NanumBarunGothic,
+Naver NanumBarunGothic, NanumSquareRound, NanumBarunPen, MaruBuri
 
-This license is copied below, and is also available with a FAQ at: http://scripts.sil.org/OFL
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
 
 
 -----------------------------------------------------------

src/librustdoc/html/static_files.rs

@@ -160,15 +160,35 @@ crate mod source_code_pro {
     crate static LICENSE: &[u8] = include_bytes!("static/fonts/SourceCodePro-LICENSE.txt");
 }
 
-crate mod noto_sans_kr {
-    /// The file `noto-sans-kr.woff`, the Regular variant of the Noto Sans KR font.
-    crate static REGULAR: &[u8] = include_bytes!("static/fonts/noto-sans-kr-regular.woff");
-
-    /// The file `noto-sans-kr.woff2`, the Regular variant of the Noto Sans KR font.
-    crate static REGULAR2: &[u8] = include_bytes!("static/fonts/noto-sans-kr-regular.woff2");
-
-    /// The file `noto-sans-kr-LICENSE.txt`, the license text of the Noto Sans KR font.
-    crate static LICENSE: &[u8] = include_bytes!("static/fonts/noto-sans-kr-LICENSE.txt");
+/// Files related to the Nanum Barun Gothic font.
+///
+/// These files are used to avoid some legacy CJK serif fonts in Windows.
+///
+/// Note that the Noto Sans KR font, which was used previously but was not very readable on Windows,
+/// has been replaced by the Nanum Barun Gothic font. This is due to Windows' implementation of font
+/// rendering that distorts OpenType fonts too much.
+///
+/// The font files were generated with these commands:
+///
+/// ```sh
+/// pyftsubset NanumBarunGothic.ttf \
+/// --unicodes=U+AC00-D7AF,U+1100-11FF,U+3130-318F,U+A960-A97F,U+D7B0-D7FF \
+/// --output-file=NanumBarunGothic.ttf.woff --flavor=woff
+/// ```
+/// ```sh
+/// pyftsubset NanumBarunGothic.ttf \
+/// --unicodes=U+AC00-D7AF,U+1100-11FF,U+3130-318F,U+A960-A97F,U+D7B0-D7FF \
+/// --output-file=NanumBarunGothic.ttf.woff2 --flavor=woff2
+/// ```
+crate mod nanum_barun_gothic {
+    /// The file `NanumBarunGothic.ttf.woff`, the Regular variant of the Nanum Barun Gothic font.
+    crate static REGULAR: &[u8] = include_bytes!("static/fonts/NanumBarunGothic.ttf.woff");
+
+    /// The file `NanumBarunGothic.ttf.woff2`, the Regular variant of the Nanum Barun Gothic font.
+    crate static REGULAR2: &[u8] = include_bytes!("static/fonts/NanumBarunGothic.ttf.woff2");
+
+    /// The file `NanumBarunGothic-LICENSE.txt`, the license text of the Nanum Barun Gothic font.
+    crate static LICENSE: &[u8] = include_bytes!("static/fonts/NanumBarunGothic-LICENSE.txt");
 }
 
 /// Files related to the sidebar in rustdoc sources.

src/test/rustdoc-gui/module-items-font.goml

@@ -1,23 +1,23 @@
 // This test checks that the correct font is used on module items (in index.html pages).
 goto: file://|DOC_PATH|/test_docs/index.html
-assert-css: (".item-table .module-item a", {"font-family": '"Fira Sans", Arial, sans-serif'}, ALL)
-assert-css: (".item-table .docblock-short", {"font-family": '"Source Serif 4", "Noto Sans KR", serif'}, ALL)
+assert-css: (".item-table .module-item a", {"font-family": '"Fira Sans", Arial, NanumBarunGothic, sans-serif'}, ALL)
+assert-css: (".item-table .docblock-short", {"font-family": '"Source Serif 4", NanumBarunGothic, serif'}, ALL)
 
 // modules
-assert-css: ("#modules + .item-table .item-left a", {"font-family": '"Fira Sans", Arial, sans-serif'})
-assert-css: ("#modules + .item-table .item-right.docblock-short", {"font-family": '"Source Serif 4", "Noto Sans KR", serif'})
+assert-css: ("#modules + .item-table .item-left a", {"font-family": '"Fira Sans", Arial, NanumBarunGothic, sans-serif'})
+assert-css: ("#modules + .item-table .item-right.docblock-short", {"font-family": '"Source Serif 4", NanumBarunGothic, serif'})
 // structs
-assert-css: ("#structs + .item-table .item-left a", {"font-family": '"Fira Sans", Arial, sans-serif'})
-assert-css: ("#structs + .item-table .item-right.docblock-short", {"font-family": '"Source Serif 4", "Noto Sans KR", serif'})
+assert-css: ("#structs + .item-table .item-left a", {"font-family": '"Fira Sans", Arial, NanumBarunGothic, sans-serif'})
+assert-css: ("#structs + .item-table .item-right.docblock-short", {"font-family": '"Source Serif 4", NanumBarunGothic, serif'})
 // enums
-assert-css: ("#enums + .item-table .item-left a", {"font-family": '"Fira Sans", Arial, sans-serif'})
-assert-css: ("#enums + .item-table .item-right.docblock-short", {"font-family": '"Source Serif 4", "Noto Sans KR", serif'})
+assert-css: ("#enums + .item-table .item-left a", {"font-family": '"Fira Sans", Arial, NanumBarunGothic, sans-serif'})
+assert-css: ("#enums + .item-table .item-right.docblock-short", {"font-family": '"Source Serif 4", NanumBarunGothic, serif'})
 // traits
-assert-css: ("#traits + .item-table .item-left a", {"font-family": '"Fira Sans", Arial, sans-serif'})
-assert-css: ("#traits + .item-table .item-right.docblock-short", {"font-family": '"Source Serif 4", "Noto Sans KR", serif'})
+assert-css: ("#traits + .item-table .item-left a", {"font-family": '"Fira Sans", Arial, NanumBarunGothic, sans-serif'})
+assert-css: ("#traits + .item-table .item-right.docblock-short", {"font-family": '"Source Serif 4", NanumBarunGothic, serif'})
 // functions
-assert-css: ("#functions + .item-table .item-left a", {"font-family": '"Fira Sans", Arial, sans-serif'})
-assert-css: ("#functions + .item-table .item-right.docblock-short", {"font-family": '"Source Serif 4", "Noto Sans KR", serif'})
+assert-css: ("#functions + .item-table .item-left a", {"font-family": '"Fira Sans", Arial, NanumBarunGothic, sans-serif'})
+assert-css: ("#functions + .item-table .item-right.docblock-short", {"font-family": '"Source Serif 4", NanumBarunGothic, serif'})
 // keywords
-assert-css: ("#keywords + .item-table .item-left a", {"font-family": '"Fira Sans", Arial, sans-serif'})
-assert-css: ("#keywords + .item-table .item-right.docblock-short", {"font-family": '"Source Serif 4", "Noto Sans KR", serif'})
+assert-css: ("#keywords + .item-table .item-left a", {"font-family": '"Fira Sans", Arial, NanumBarunGothic, sans-serif'})
+assert-css: ("#keywords + .item-table .item-right.docblock-short", {"font-family": '"Source Serif 4", NanumBarunGothic, serif'})