Google Docs accessibility refactor (#2023)

* Skip urlRegex if it's used as a filter

* Add getRequiredContentScriptRegistrationPermissions function

* Add a reentrant check to google-docs.js

* Remove script node

* Move forceGoogleDocsHtmlRendering check into google-docs.js

* Replace document-start.js usage with google-docs.js

* Remove documentStart handling

* Add missing parameter descriptions

1 files changed, 31 insertions, 1 deletions

diff --git a/ext/js/accessibility/google-docs.js b/ext/js/accessibility/google-docs.js
index f9ba0f7f..e45743ab 100644
--- a/ext/js/accessibility/google-docs.js
+++ b/ext/js/accessibility/google-docs.js
@@ -15,7 +15,36 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-(() => {
+(async () => {
+    // Reentrant check
+    if (self.googleDocsAccessibilitySetup) { return; }
+    self.googleDocsAccessibilitySetup = true;
+
+    const invokeApi = (action, params) => {
+        return new Promise((resolve, reject) => {
+            chrome.runtime.sendMessage({action, params}, (response) => {
+                void chrome.runtime.lastError;
+                if (typeof response !== 'object' || response === null) {
+                    reject(new Error('Unexpected response'));
+                } else if (typeof response.error !== 'undefined') {
+                    reject(new Error('Invalid response'));
+                } else {
+                    resolve(response.result);
+                }
+            });
+        });
+    };
+
+    const optionsContext = {depth: 0, url: location.href};
+    let options;
+    try {
+        options = await invokeApi('optionsGet', {optionsContext});
+    } catch (e) {
+        return;
+    }
+
+    if (!options.accessibility.forceGoogleDocsHtmlRendering) { return; }
+
     let parent = document.head;
     if (parent === null) {
         parent = document.documentElement;
@@ -24,4 +53,5 @@
     const script = document.createElement('script');
     script.textContent = 'window._docs_force_html_by_ext = true;';
     parent.appendChild(script);
+    parent.removeChild(script);
 })();