From d6767219ff6ff38a0937c398d017f98561c14244 Mon Sep 17 00:00:00 2001
From: Patrick Walton <pcwalton@mimiga.net>
Date: Wed, 30 Aug 2017 19:48:18 -0700
Subject: [PATCH] Automatically load some built-in fonts and SVGs

---
 demo/client/css/pathfinder.css    |  3 +-
 demo/client/html/3d-demo.html     |  1 -
 demo/client/html/svg-demo.html    |  1 -
 demo/client/html/text-demo.html   |  1 -
 demo/client/src/app-controller.ts | 15 +++++
 demo/client/src/svg-demo.ts       |  8 +++
 demo/client/src/text-demo.ts      | 14 ++++-
 demo/server/src/main.rs           | 99 ++++++++++++++++++++++++-------
 8 files changed, 114 insertions(+), 28 deletions(-)

diff --git a/demo/client/css/pathfinder.css b/demo/client/css/pathfinder.css
index ea2f4ba8..29d998d6 100644
--- a/demo/client/css/pathfinder.css
+++ b/demo/client/css/pathfinder.css
@@ -7,7 +7,7 @@
     user-select: none;
     -moz-user-select: none;
     opacity: 1.0;
-    transition: opacity 300ms, transform 300ms;
+    transition: opacity 300ms, transform 300ms, visibility 300ms;
     transform: translateY(0);
 }
 #pf-settings-button:not(:hover) {
@@ -20,6 +20,7 @@
 #pf-settings.pf-invisible {
     opacity: 0.0;
     transform: translateY(1em);
+    visibility: hidden;
 }
 button > svg {
     width: 1.25em;
diff --git a/demo/client/html/3d-demo.html b/demo/client/html/3d-demo.html
index 330c27b9..47915f8f 100644
--- a/demo/client/html/3d-demo.html
+++ b/demo/client/html/3d-demo.html
@@ -17,7 +17,6 @@
                          aria-label="Close">
                             <span aria-hidden="true">&times;</span>
                         </button>
-                        <h4 class="card-title">Settings</h4>
                         <form>
                             <div class="form-group">
                                 <label for="pf-aa-level-select">Antialiasing</label>
diff --git a/demo/client/html/svg-demo.html b/demo/client/html/svg-demo.html
index 0df1bddb..41709ce7 100644
--- a/demo/client/html/svg-demo.html
+++ b/demo/client/html/svg-demo.html
@@ -18,7 +18,6 @@
                          aria-label="Close">
                             <span aria-hidden="true">&times;</span>
                         </button>
-                        <h4 class="card-title">Settings</h4>
                         <form>
                             <div class="form-group">
                                 <label for="pf-select-file">SVG document</label>
diff --git a/demo/client/html/text-demo.html b/demo/client/html/text-demo.html
index b900d372..f48a295a 100644
--- a/demo/client/html/text-demo.html
+++ b/demo/client/html/text-demo.html
@@ -17,7 +17,6 @@
                          aria-label="Close">
                             <span aria-hidden="true">&times;</span>
                         </button>
-                        <h4 class="card-title">Settings</h4>
                         <form>
                             <div class="form-group">
                                 <label for="pf-select-file">Font</label>
diff --git a/demo/client/src/app-controller.ts b/demo/client/src/app-controller.ts
index 0540eeb4..f900246f 100644
--- a/demo/client/src/app-controller.ts
+++ b/demo/client/src/app-controller.ts
@@ -50,6 +50,10 @@ export default abstract class AppController<View extends PathfinderView> {
         this.updateAALevel();
     }
 
+    protected loadInitialFile() {
+        this.fileSelectionChanged();
+    }
+
     private updateAALevel() {
         const selectedOption = this.aaLevelSelect.selectedOptions[0];
         const aaValues = unwrapNull(/^([a-z-]+)(?:-([0-9]+))?$/.exec(selectedOption.value));
@@ -83,13 +87,24 @@ export default abstract class AppController<View extends PathfinderView> {
             return;
         }
 
+        // Remove the "Custom…" placeholder if it exists.
         const placeholder = document.getElementById('pf-custom-option-placeholder');
         if (placeholder != null)
             this.selectFileElement.removeChild(placeholder);
+
+        // Fetch the file.
+        window.fetch(`${this.builtinFileURI}/${selectedOption.value}`)
+              .then(response => response.arrayBuffer())
+              .then(data => {
+                  this.fileData = data;
+                  this.fileLoaded();
+              });
     }
 
     protected abstract fileLoaded(): void;
 
+    protected abstract get builtinFileURI(): string;
+
     protected abstract createView(canvas: HTMLCanvasElement,
                                   commonShaderSource: string,
                                   shaderSources: ShaderMap<ShaderProgramSource>): View;
diff --git a/demo/client/src/svg-demo.ts b/demo/client/src/svg-demo.ts
index 86fb5df8..4beb73cb 100644
--- a/demo/client/src/svg-demo.ts
+++ b/demo/client/src/svg-demo.ts
@@ -29,6 +29,8 @@ const SVG_NS: string = "http://www.w3.org/2000/svg";
 
 const PARTITION_SVG_PATHS_ENDPOINT_URL: string = "/partition-svg-paths";
 
+const BUILTIN_SVG_URI: string = "/svg/demo";
+
 const ANTIALIASING_STRATEGIES: AntialiasingStrategyTable = {
     none: NoAAStrategy,
     ssaa: SSAAStrategy,
@@ -59,6 +61,8 @@ class SVGDemoController extends AppController<SVGDemoView> {
         this.svg = document.getElementById('pf-svg') as Element as SVGSVGElement;
 
         this.pathElements = [];
+
+        this.loadInitialFile();
     }
 
     protected fileLoaded() {
@@ -141,6 +145,10 @@ class SVGDemoController extends AppController<SVGDemoView> {
         });
     }
 
+    protected get builtinFileURI(): string {
+        return BUILTIN_SVG_URI;
+    }
+
     private meshesReceived() {
         this.view.then(view => {
             view.uploadPathData(this.pathElements);
diff --git a/demo/client/src/text-demo.ts b/demo/client/src/text-demo.ts
index d3d0d171..b8d3dab2 100644
--- a/demo/client/src/text-demo.ts
+++ b/demo/client/src/text-demo.ts
@@ -68,6 +68,8 @@ const INITIAL_FONT_SIZE: number = 72.0;
 
 const PARTITION_FONT_ENDPOINT_URL: string = "/partition-font";
 
+const BUILTIN_FONT_URI: string = "/otf/demo";
+
 const B_POSITION_SIZE: number = 8;
 
 const B_PATH_INDEX_SIZE: number = 2;
@@ -119,6 +121,8 @@ class TextDemoController extends AppController<TextDemoView> {
         this.fontSize = INITIAL_FONT_SIZE;
 
         this.fpsLabel = unwrapNull(document.getElementById('pf-fps-label'));
+
+        this.loadInitialFile();
     }
 
     protected createView(canvas: HTMLCanvasElement,
@@ -144,8 +148,12 @@ class TextDemoController extends AppController<TextDemoView> {
         this.uniqueGlyphs = _.sortedUniqBy(this.uniqueGlyphs, glyph => glyph.index);
 
         // Build the partitioning request to the server.
+        //
+        // FIXME(pcwalton): If this is a builtin font, don't resend it to the server!
         const request = {
-            otf: base64js.fromByteArray(new Uint8Array(this.fileData)),
+            face: {
+                Custom: base64js.fromByteArray(new Uint8Array(this.fileData)),
+            },
             fontIndex: 0,
             glyphs: this.uniqueGlyphs.map(glyph => {
                 const metrics = glyph.metrics;
@@ -200,6 +208,10 @@ class TextDemoController extends AppController<TextDemoView> {
         this.view.then(view => view.attachText());
     }
 
+    protected get builtinFileURI(): string {
+        return BUILTIN_FONT_URI;
+    }
+
     private fpsLabel: HTMLElement;
 
     font: opentype.Font;
diff --git a/demo/server/src/main.rs b/demo/server/src/main.rs
index aafb04a9..ecdd6ebc 100644
--- a/demo/server/src/main.rs
+++ b/demo/server/src/main.rs
@@ -33,7 +33,7 @@ use rocket::response::{NamedFile, Responder, Response};
 use rocket_contrib::json::Json;
 use serde::Serialize;
 use std::fs::File;
-use std::io;
+use std::io::{self, Read};
 use std::mem;
 use std::path::{Path, PathBuf};
 use std::u32;
@@ -51,6 +51,16 @@ static STATIC_JS_PATHFINDER_PATH: &'static str = "../client";
 static STATIC_SVG_OCTICONS_PATH: &'static str = "../client/node_modules/octicons/build/svg";
 static STATIC_GLSL_PATH: &'static str = "../../shaders";
 
+static BUILTIN_FONTS: [(&'static str, &'static str); 3] = [
+    ("open-sans", "../../resources/fonts/open-sans/OpenSans-Regular.ttf"),
+    ("nimbus-sans", "../../resources/fonts/nimbus-sans/NimbusSanL-Regu.ttf"),
+    ("eb-garamond", "../../resources/fonts/eb-garamond/EBGaramond12-Regular.ttf"),
+];
+
+static BUILTIN_SVGS: [(&'static str, &'static str); 1] = [
+    ("tiger", "../../resources/svg/Ghostscript_Tiger.svg"),
+];
+
 #[derive(Clone, Copy, Debug, Serialize, Deserialize)]
 struct SubpathRange {
     start: u32,
@@ -77,14 +87,22 @@ impl IndexRange {
     }
 }
 
-#[allow(non_snake_case)]
 #[derive(Clone, Serialize, Deserialize)]
 struct PartitionFontRequest {
-    // Base64 encoded.
-    otf: String,
-    fontIndex: u32,
+    face: PartitionFontRequestFace,
+    #[serde(rename = "fontIndex")]
+    font_index: u32,
     glyphs: Vec<PartitionGlyph>,
-    pointSize: f64,
+    #[serde(rename = "pointSize")]
+    point_size: f64,
+}
+
+#[derive(Clone, Serialize, Deserialize)]
+enum PartitionFontRequestFace {
+    /// One of the builtin fonts in `BUILTIN_FONTS`.
+    Builtin(String),
+    /// Base64-encoded OTF data.
+    Custom(String),
 }
 
 #[derive(Clone, Copy, Serialize, Deserialize)]
@@ -182,6 +200,7 @@ struct PartitionEncodedPathData {
 
 #[derive(Clone, Copy, Serialize, Deserialize)]
 enum PartitionFontError {
+    UnknownBuiltinFont,
     Base64DecodingFailed,
     FontSanitizationFailed,
     FontLoadingFailed,
@@ -312,26 +331,44 @@ fn partition_paths(partitioner: &mut Partitioner, subpath_indices: &[SubpathRang
 #[post("/partition-font", format = "application/json", data = "<request>")]
 fn partition_font(request: Json<PartitionFontRequest>)
                   -> Json<Result<PartitionFontResponse, PartitionFontError>> {
-    // Decode Base64-encoded OTF data.
-    let unsafe_otf_data = match base64::decode(&request.otf) {
-        Ok(unsafe_otf_data) => unsafe_otf_data,
-        Err(_) => return Json(Err(PartitionFontError::Base64DecodingFailed)),
-    };
+    // Fetch the OTF data.
+    let otf_data = match request.face {
+        PartitionFontRequestFace::Builtin(ref builtin_font_name) => {
+            // Read in the builtin font.
+            match BUILTIN_FONTS.iter().filter(|& &(name, _)| name == builtin_font_name).next() {
+                Some(&(_, path)) => {
+                    let mut data = vec![];
+                    File::open(path).expect("Couldn't find builtin font!")
+                                    .read_to_end(&mut data)
+                                    .expect("Couldn't read builtin font!");
+                    data
+                }
+                None => return Json(Err(PartitionFontError::UnknownBuiltinFont)),
+            }
+        }
+        PartitionFontRequestFace::Custom(ref encoded_data) => {
+            // Decode Base64-encoded OTF data.
+            let unsafe_otf_data = match base64::decode(encoded_data) {
+                Ok(unsafe_otf_data) => unsafe_otf_data,
+                Err(_) => return Json(Err(PartitionFontError::Base64DecodingFailed)),
+            };
 
-    // Sanitize.
-    let otf_data = match fontsan::process(&unsafe_otf_data) {
-        Ok(otf_data) => otf_data,
-        Err(_) => return Json(Err(PartitionFontError::FontSanitizationFailed)),
+            // Sanitize.
+            match fontsan::process(&unsafe_otf_data) {
+                Ok(otf_data) => otf_data,
+                Err(_) => return Json(Err(PartitionFontError::FontSanitizationFailed)),
+            }
+        }
     };
 
     // Parse glyph data.
     let font_key = FontKey::new();
     let font_instance_key = FontInstanceKey {
         font_key: font_key,
-        size: Au::from_f64_px(request.pointSize),
+        size: Au::from_f64_px(request.point_size),
     };
     let mut font_context = FontContext::new();
-    if font_context.add_font_from_memory(&font_key, otf_data, request.fontIndex).is_err() {
+    if font_context.add_font_from_memory(&font_key, otf_data, request.font_index).is_err() {
         return Json(Err(PartitionFontError::FontLoadingFailed))
     }
 
@@ -476,15 +513,15 @@ fn partition_svg_paths(request: Json<PartitionSvgPathsRequest>)
 
 // Static files
 #[get("/")]
-fn static_text_demo() -> io::Result<NamedFile> {
+fn static_demo_text() -> io::Result<NamedFile> {
     NamedFile::open(STATIC_TEXT_DEMO_PATH)
 }
 #[get("/demo/svg")]
-fn static_svg_demo() -> io::Result<NamedFile> {
+fn static_demo_svg() -> io::Result<NamedFile> {
     NamedFile::open(STATIC_SVG_DEMO_PATH)
 }
 #[get("/demo/3d")]
-fn static_3d_demo() -> io::Result<NamedFile> {
+fn static_demo_3d() -> io::Result<NamedFile> {
     NamedFile::open(STATIC_3D_DEMO_PATH)
 }
 #[get("/css/bootstrap/<file..>")]
@@ -523,6 +560,20 @@ fn static_svg_octicons(file: PathBuf) -> Option<NamedFile> {
 fn static_glsl(file: PathBuf) -> Option<Shader> {
     Shader::open(Path::new(STATIC_GLSL_PATH).join(file)).ok()
 }
+#[get("/otf/demo/<font_name>")]
+fn static_otf_demo(font_name: String) -> Option<NamedFile> {
+    BUILTIN_FONTS.iter()
+                 .filter(|& &(name, _)| name == font_name)
+                 .next()
+                 .and_then(|&(_, path)| NamedFile::open(Path::new(path)).ok())
+}
+#[get("/svg/demo/<svg_name>")]
+fn static_svg_demo(svg_name: String) -> Option<NamedFile> {
+    BUILTIN_SVGS.iter()
+                .filter(|& &(name, _)| name == svg_name)
+                .next()
+                .and_then(|&(_, path)| NamedFile::open(Path::new(path)).ok())
+}
 
 struct Shader {
     file: File,
@@ -546,9 +597,9 @@ fn main() {
     rocket::ignite().mount("/", routes![
         partition_font,
         partition_svg_paths,
-        static_text_demo,
-        static_svg_demo,
-        static_3d_demo,
+        static_demo_text,
+        static_demo_svg,
+        static_demo_3d,
         static_css_bootstrap,
         static_css_octicons,
         static_css_pathfinder_css,
@@ -558,5 +609,7 @@ fn main() {
         static_js_pathfinder,
         static_svg_octicons,
         static_glsl,
+        static_otf_demo,
+        static_svg_demo,
     ]).launch();
 }