From 542fd9caba53b1fd10d6b7f0490fc8c9d7e991b1 Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@gmail.com>
Date: Tue, 17 May 2022 15:46:47 -0400
Subject: [PATCH] selective font inclusion for emojis

Selectively include fonts for emojis that are used in the interface. This is done instead of including both the entirety of `NotoEmoji-Regular` and `emoji-icon-font`. This now requires the `pyftsubset` utility to be installed (under arch, this can be done with the package `python-fonttools`)

TODO: need to fix github workflows
---
 Cargo.lock | 37 ++++++++++++++++++++++++++++++++++
 Cargo.toml |  1 +
 build.rs   | 59 +++++++++++++++++++++++++++++++++++++++++++++++++-----
 3 files changed, 92 insertions(+), 5 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 6551488..179f37a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -650,6 +650,12 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9ea835d29036a4087793836fa931b08837ad5e957da9e23886b29586fb9b6650"
 
+[[package]]
+name = "dunce"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "453440c271cf5577fd2a40e4942540cb7d0d2f85e27c8d07dd0023c925a67541"
+
 [[package]]
 name = "eframe"
 version = "0.18.0"
@@ -818,6 +824,17 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "fsio"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09e87827efaf94c7a44b562ff57de06930712fe21b530c3797cdede26e6377eb"
+dependencies = [
+ "dunce",
+ "rand",
+ "users",
+]
+
 [[package]]
 name = "gethostname"
 version = "0.2.3"
@@ -1890,6 +1907,15 @@ dependencies = [
  "bytemuck",
 ]
 
+[[package]]
+name = "run_script"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5dd85213e37f76b40186ee781cf3a689b05c518c3102c987acf679c573d8e4ef"
+dependencies = [
+ "fsio",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.21"
@@ -2371,6 +2397,16 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "users"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24cc0f6d6f267b73e5a2cadf007ba8f9bc39c6a6f9666f8cf25ea809a153b032"
+dependencies = [
+ "libc",
+ "log",
+]
+
 [[package]]
 name = "uuid"
 version = "0.8.2"
@@ -2791,6 +2827,7 @@ dependencies = [
  "lazy_static",
  "parsing",
  "rayon",
+ "run_script",
  "ruzstd",
  "serde",
  "serde_json",
diff --git a/Cargo.toml b/Cargo.toml
index ed5b85f..a0ef072 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -70,6 +70,7 @@ bincode = "1.3"
 serde = "1"
 serde_json = "1"
 zstd = "0.11"
+run_script = "0.9.0"
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 instant = "0.1"
diff --git a/build.rs b/build.rs
index 43c5209..41d4fc4 100644
--- a/build.rs
+++ b/build.rs
@@ -7,10 +7,12 @@ use std::{
 };
 
 use epaint::{
-	text::{FontData, FontDefinitions},
+	text::{FontData, FontDefinitions, FontTweak},
 	FontFamily,
 };
 
+use run_script::ScriptOptions;
+
 include!(concat!(env!("CARGO_MANIFEST_DIR"), "/src/data.rs"));
 
 fn main() {
@@ -22,15 +24,62 @@ fn main() {
 
 	// let font_hack = FontData::from_static(include_bytes!("assets/Hack-Regular.ttf"));
 	let font_ubuntu_light = FontData::from_static(include_bytes!("assets/Ubuntu-Light.ttf"));
-	let font_notoemoji = FontData::from_static(include_bytes!("assets/NotoEmoji-Regular.ttf"));
-	let font_emoji_icon = FontData::from_static(include_bytes!("assets/emoji-icon-font.ttf"));
+	let new_noto_path = [&env::var("OUT_DIR").unwrap(), "/noto-emoji.ttf"].concat();
+	let new_emoji_icon_path = [&env::var("OUT_DIR").unwrap(), "/emoji-icon.ttf"].concat();
+
+	let (_code, _output, error) = run_script::run(
+		&format!(
+			"
+		pyftsubset {}/assets/NotoEmoji-Regular.ttf --unicodes=U+1F31E,U+1F319,U+2716
+		mv {}/assets/NotoEmoji-Regular.subset.ttf {}
+         ",
+			env!("CARGO_MANIFEST_DIR"),
+			env!("CARGO_MANIFEST_DIR"),
+			new_noto_path
+		),
+		&(vec![]),
+		&ScriptOptions::new(),
+	)
+	.unwrap();
+	assert_eq!(error, String::new());
+
+	let (_code, _output, error) = run_script::run(
+		&format!(
+			"
+		pyftsubset {}/assets/emoji-icon-font.ttf --unicodes=U+2699
+		mv {}/assets/emoji-icon-font.subset.ttf {}
+         ",
+			env!("CARGO_MANIFEST_DIR"),
+			env!("CARGO_MANIFEST_DIR"),
+			new_emoji_icon_path
+		),
+		&(vec![]),
+		&ScriptOptions::new(),
+	)
+	.unwrap();
+	assert_eq!(error, String::new());
 
 	let fonts = FontDefinitions {
 		font_data: BTreeMap::from([
 			// ("Hack".to_owned(), font_hack),
 			("Ubuntu-Light".to_owned(), font_ubuntu_light),
-			("NotoEmoji-Regular".to_owned(), font_notoemoji),
-			("emoji-icon-font".to_owned(), font_emoji_icon),
+			(
+				"NotoEmoji-Regular".to_owned(),
+				FontData::from_owned(
+					std::fs::read(new_noto_path).expect("unable to read noto emoji font"),
+				),
+			),
+			(
+				"emoji-icon-font".to_owned(),
+				FontData::from_owned(
+					std::fs::read(new_emoji_icon_path).expect("unable to read emoji icon font"),
+				)
+				.tweak(FontTweak {
+					scale: 0.8,
+					y_offset_factor: 0.07,
+					y_offset: 0.0,
+				}),
+			),
 		]),
 		families: BTreeMap::from([
 			(