Bug 1400805 - added WebExtension API to get/set browser.display.use_document_fonts r=ntim,zombie

MozReview-Commit-ID: 9JaJN1yTxMy

--HG--
extra : rebase_source : 097cbef283a62ab3fc69bdb62a06c0f1feae5dbc

toolkit/components/extensions/parent/ext-browserSettings.js

@@ -239,6 +239,16 @@ ExtensionPreferencesManager.addSetting("overrideDocumentColors", {
   },
 });
 
+ExtensionPreferencesManager.addSetting("useDocumentFonts", {
+  prefNames: [
+    "browser.display.use_document_fonts",
+  ],
+
+  setCallback(value) {
+    return {[this.prefNames[0]]: value};
+  },
+});
+
 this.browserSettings = class extends ExtensionAPI {
   getAPI(context) {
     let {extension} = context;
@@ -448,6 +458,24 @@ this.browserSettings = class extends ExtensionAPI {
             },
           }
         ),
+        useDocumentFonts: Object.assign(
+          getSettingsAPI(
+            extension, "useDocumentFonts",
+            () => {
+              return Services.prefs.getIntPref("browser.display.use_document_fonts") !== 0;
+            }
+          ),
+          {
+            set: details => {
+              if (typeof details.value !== "boolean") {
+                throw new ExtensionError(
+                  `${details.value} is not a valid value for useDocumentFonts.`);
+              }
+              return ExtensionPreferencesManager.setSetting(
+                extension.id, "useDocumentFonts", Number(details.value));
+            },
+          }
+        ),
       },
     };
   }

toolkit/components/extensions/schemas/browser_settings.json

@@ -160,6 +160,10 @@
       "overrideDocumentColors": {
         "$ref": "types.Setting",
         "description": "This setting controls whether the user-chosen colors override the page's colors."
+      },
+      "useDocumentFonts": {
+        "$ref": "types.Setting",
+        "description": "This setting controls whether the document's fonts are used."
       }
     }
   }

toolkit/components/extensions/test/xpcshell/test_ext_browserSettings.js

@@ -51,6 +51,7 @@ add_task(async function test_browser_settings() {
     "browser.tabs.insertRelatedAfterCurrent": true,
     "browser.tabs.insertAfterCurrent": false,
     "browser.display.document_color_use": 1,
+    "browser.display.use_document_fonts": 1,
   };
 
   async function background() {
@@ -220,6 +221,13 @@ add_task(async function test_browser_settings() {
     "overrideDocumentColors", "always",
     {"browser.display.document_color_use": 2});
 
+  await testSetting(
+    "useDocumentFonts", false,
+    {"browser.display.use_document_fonts": 0});
+  await testSetting(
+    "useDocumentFonts", true,
+    {"browser.display.use_document_fonts": 1});
+
   async function testProxy(config, expectedPrefs) {
     // proxyConfig is not supported on Android.
     if (AppConstants.platform === "android") {