From b3a943bd9db4cabfa0de7ae9436d596217d5adfd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luiz=20Am=C3=A9rico?= <luizamericop@gmail.com>
Date: Sun, 3 Mar 2019 15:17:08 -0300
Subject: [PATCH] Add fontCache option

---
 lib/font/embedded.js    |  7 ++++++-
 tests/unit/font.spec.js | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 tests/unit/font.spec.js

diff --git a/lib/font/embedded.js b/lib/font/embedded.js
index a920188..09892c5 100644
--- a/lib/font/embedded.js
+++ b/lib/font/embedded.js
@@ -23,7 +23,9 @@ class EmbeddedFont extends PDFFont {
     this.lineGap = this.font.lineGap * this.scale;
     this.bbox = this.font.bbox;
 
-    this.layoutCache = Object.create(null);
+    if (document.options.fontCache !== false) {
+      this.layoutCache = Object.create(null);
+    }
   }
 
   layoutRun(text, features) {
@@ -43,6 +45,9 @@ class EmbeddedFont extends PDFFont {
   }
 
   layoutCached(text) {
+    if (!this.layoutCache) {
+      return this.layoutRun(text);
+    }
     let cached;
     if ((cached = this.layoutCache[text])) {
       return cached;
diff --git a/tests/unit/font.spec.js b/tests/unit/font.spec.js
new file mode 100644
index 0000000..79f20f7
--- /dev/null
+++ b/tests/unit/font.spec.js
@@ -0,0 +1,36 @@
+const PDFFontFactory = require('../../lib/font_factory').default;
+const PDFDocument = require('../../lib/document').default;
+
+describe('EmbeddedFont', () => {
+  test('no fontCache option', () => {
+    const document = new PDFDocument();
+    const font = PDFFontFactory.open(
+      document,
+      'tests/fonts/Roboto-Regular.ttf'
+    );
+    const runSpy = jest.spyOn(font, 'layoutRun');
+
+    font.layout('test');
+    font.layout('test');
+    font.layout('test');
+    font.layout('test');
+
+    expect(runSpy).toBeCalledTimes(1);
+  });
+
+  test('fontCache = false', () => {
+    const document = new PDFDocument({ fontCache: false });
+    const font = PDFFontFactory.open(
+      document,
+      'tests/fonts/Roboto-Regular.ttf'
+    );
+    const runSpy = jest.spyOn(font, 'layoutRun');
+
+    font.layout('test');
+    font.layout('test');
+    font.layout('test');
+    font.layout('test');
+
+    expect(runSpy).toBeCalledTimes(4);
+  });
+});