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browser(firefox): resolve blank document race when accessing a11y

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This commit is contained in:
Pavel Feldman 2020-01-29 08:25:43 -08:00
parent 492304be41
commit a366319145
2 changed files with 19 additions and 3 deletions
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2
browser_patches/firefox/BUILD_NUMBER
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@ -1 +1 @@
1020
1021

20
browser_patches/firefox/patches/bootstrap.diff
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@ -2109,10 +2109,10 @@ index 0000000000000000000000000000000000000000..2508cce41565023b7fee9c7b85afe8ec
+
diff --git a/testing/juggler/content/PageAgent.js b/testing/juggler/content/PageAgent.js
new file mode 100644
index 0000000000000000000000000000000000000000..37ab5f56739cfd16200a4ada9f4cf83436688eba
index 0000000000000000000000000000000000000000..8f96af21c037edb74b99210673102a9996884ec9
--- /dev/null
+++ b/testing/juggler/content/PageAgent.js
@@ -0,0 +1,843 @@
@@ -0,0 +1,859 @@
+"use strict";
+const {Services} = ChromeUtils.import("resource://gre/modules/Services.jsm");
+const Ci = Components.interfaces;
@ -2819,7 +2819,22 @@ index 0000000000000000000000000000000000000000..37ab5f56739cfd16200a4ada9f4cf834
+ .getService(Ci.nsIAccessibilityService);
+ const document = this._frameTree.mainFrame().domWindow().document;
+ const docAcc = service.getAccessibleFor(document);
+ const content = this._session.mm().content;
+
+ async function waitForRoot() {
+ let callback;
+ const result = new Promise(f => callback = f);
+ const poll = () => {
+ if (!docAcc.firstChild && content.document.body.hasChildNodes()) {
+ const timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
+ timer.init(poll, 50, Ci.nsITimer.TYPE_ONE_SHOT);
+ } else {
+ callback();
+ }
+ }
+ poll();
+ return result;
+ }
+ async function waitForQuiet() {
+ let state = {};
+ docAcc.getState(state, {});
@ -2925,6 +2940,7 @@ index 0000000000000000000000000000000000000000..37ab5f56739cfd16200a4ada9f4cf834
+ tree.children = children;
+ return tree;
+ }
+ await waitForRoot();
+ await waitForQuiet();
+ return {
+ tree: buildNode(docAcc)