Google Docs accessibility update (#2235)

* Update Google Docs injection script

* Create GoogleDocsUtil

* Update Frontend.js to register GoogleDocsUtil's getRangeFromPoint handler

* Update setting name and description

* Add comment

* Fix Firefox support

1 files changed, 19 insertions, 0 deletions

diff --git a/ext/js/app/frontend.js b/ext/js/app/frontend.js
index 4f704faf..3a262c65 100644
--- a/ext/js/app/frontend.js
+++ b/ext/js/app/frontend.js
@@ -17,6 +17,7 @@
 
 /* global
  * DocumentUtil
+ * GoogleDocsUtil
  * TextScanner
  * TextSourceRange
  */
@@ -164,6 +165,7 @@ class Frontend {
             ['Frontend.getPageInfo',      {async: false, handler: this._onApiGetPageInfo.bind(this)}]
         ]);
 
+        this._prepareSiteSpecific();
         this._updateContentScale();
         this._signalFrontendReady();
     }
@@ -770,4 +772,21 @@ class Frontend {
         }
         return null;
     }
+
+    _prepareSiteSpecific() {
+        switch (location.hostname.toLowerCase()) {
+            case 'docs.google.com':
+                this._prepareGoogleDocs();
+                break;
+        }
+    }
+
+    async _prepareGoogleDocs() {
+        if (typeof GoogleDocsUtil !== 'undefined') { return; }
+        await yomichan.api.loadExtensionScripts([
+            '/js/accessibility/google-docs-util.js'
+        ]);
+        if (typeof GoogleDocsUtil === 'undefined') { return; }
+        DocumentUtil.registerGetRangeFromPointHandler(GoogleDocsUtil.getRangeFromPoint.bind(GoogleDocsUtil));
+    }
 }