Merge pull request #5569 from Tyriar/5568_font_ligatures

Merge font-ligatures package into addon-ligatures

Author: Tyriar

addons/addon-ligatures/.gitignore

@@ -3,7 +3,6 @@ node_modules/
 coverage/
 
 lib/
-fonts/
 
 .env
 .vscode/

addons/addon-ligatures/LICENSE

@@ -1,6 +1,30 @@
+Copyright (c) 2019, The xterm.js authors (https://github.com/xtermjs/xterm.js)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+---
+
+The code that analyzes font ligatures is forked from https://github.com/princjef/font-ligatures with this license:
+
 MIT License
 
-Copyright (c) 2018
+Copyright (c) 2018 Jeffrey Principe
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

addons/addon-ligatures/fonts/FiraCode-Regular.otf

@@ -32,11 +32,14 @@
   ],
   "license": "MIT",
   "dependencies": {
-    "font-finder": "^1.1.0",
-    "font-ligatures": "^1.4.1"
+    "lru-cache": "^6.0.0",
+    "opentype.js": "^0.8.0"
   },
   "devDependencies": {
+    "@types/lru-cache": "^5.1.0",
+    "@types/opentype.js": "^0.7.0",
     "axios": "^1.6.0",
+    "font-finder": "^1.1.0",
     "mkdirp": "0.5.5",
     "yauzl": "^2.10.0"
   }

addons/addon-ligatures/fonts/Monoid-Regular.ttf

@@ -3,7 +3,7 @@
  * @license MIT
  */
 
-import { Font, loadBuffer } from 'font-ligatures';
+import { Font, loadBuffer } from './fontLigatures/index';
 
 import parse from './parse';
 

addons/addon-ligatures/fonts/UbuntuMono-Regular.ttf

@@ -0,0 +1,35 @@
+import { ILookupTree, IFlattenedLookupTree, ILookupTreeEntry, IFlattenedLookupTreeEntry } from './types';
+
+export default function flatten(tree: ILookupTree): IFlattenedLookupTree {
+  const result: IFlattenedLookupTree = {};
+  for (const [glyphId, entry] of Object.entries(tree.individual)) {
+    result[glyphId] = flattenEntry(entry);
+  }
+
+  for (const { range, entry } of tree.range) {
+    const flattened = flattenEntry(entry);
+    for (let glyphId = range[0]; glyphId < range[1]; glyphId++) {
+      result[glyphId] = flattened;
+    }
+  }
+
+  return result;
+}
+
+function flattenEntry(entry: ILookupTreeEntry): IFlattenedLookupTreeEntry {
+  const result: IFlattenedLookupTreeEntry = {};
+
+  if (entry.forward) {
+    result.forward = flatten(entry.forward);
+  }
+
+  if (entry.reverse) {
+    result.reverse = flatten(entry.reverse);
+  }
+
+  if (entry.lookup) {
+    result.lookup = entry.lookup;
+  }
+
+  return result;
+}