Bug 1679050 - Backed out changeset 73181c2aa309 (bug 1455479) for having too many false positives. r=backout,a=NarcisB

MANUAL PUSH: Backout on a CLOSED TREE

browser/actors/ContextMenuChild.jsm

@@ -924,17 +924,6 @@ class ContextMenuChild extends JSWindowActorChild {
     context.shouldInitInlineSpellCheckerUINoChildren = false;
     context.shouldInitInlineSpellCheckerUIWithChildren = false;
 
-    context.hasPasteEventListeners = (function() {
-      let els = Services.els;
-      const composed = false; // Paste event listener is not composed.
-      for (let item of els.getEventTargetChainFor(context.target, composed)) {
-        if (els.hasListenersFor(item, "paste")) {
-          return true;
-        }
-      }
-      return false;
-    })();
-
     this._setContextForNodesNoChildren(editFlags);
     this._setContextForNodesWithChildren(editFlags);
 

browser/base/content/nsContextMenu.js

@@ -228,7 +228,6 @@ class nsContextMenu {
     this.onSpellcheckable = context.onSpellcheckable;
     this.onTextInput = context.onTextInput;
     this.onVideo = context.onVideo;
-    this.hasPasteEventListeners = context.hasPasteEventListeners;
 
     this.target = context.target;
     this.targetIdentifier = context.targetIdentifier;
@@ -446,7 +445,6 @@ class nsContextMenu {
       this.onTextInput ||
       this.onLink ||
       this.isContentSelected ||
-      this.hasPasteEventListeners ||
       this.onImage ||
       this.onCanvas ||
       this.onVideo ||
@@ -758,15 +756,9 @@ class nsContextMenu {
     this.showItem("context-sep-undo", this.onTextInput);
     this.showItem("context-cut", this.onTextInput);
     this.showItem("context-copy", this.isContentSelected || this.onTextInput);
-    this.showItem(
-      "context-paste",
-      this.hasPasteEventListeners || this.onTextInput
-    );
+    this.showItem("context-paste", this.onTextInput);
     this.showItem("context-delete", this.onTextInput);
-    this.showItem(
-      "context-sep-paste",
-      this.hasPasteEventListeners || this.onTextInput
-    );
+    this.showItem("context-sep-paste", this.onTextInput);
     this.showItem(
       "context-selectall",
       !(

browser/base/content/test/contextMenu/browser_contextmenu.js

@@ -271,51 +271,6 @@ add_task(async function test_mailto() {
   ]);
 });
 
-add_task(async function test_paste_event_listener() {
-  const expected = [
-    "context-navigation",
-    null,
-    [
-      "context-back",
-      false,
-      "context-forward",
-      false,
-      "context-reload",
-      true,
-      "context-bookmarkpage",
-      true,
-    ],
-    null,
-    "---",
-    null,
-    ...(hasPocket ? ["context-pocket", true] : []),
-    "---",
-    null,
-    "context-sendpagetodevice",
-    true,
-    [],
-    null,
-    "---",
-    null,
-    "context-viewbgimage",
-    false,
-    "context-paste",
-    null,
-    "---",
-    null,
-    "context-selectall",
-    true,
-    "---",
-    null,
-    "context-viewsource",
-    true,
-    "context-viewinfo",
-    true,
-  ];
-  await test_contextmenu("#test-paste-listener", expected);
-  await test_contextmenu("#test-paste-listener-child", expected);
-});
-
 add_task(async function test_image() {
   for (let selector of ["#test-image", "#test-svg-image"]) {
     await test_contextmenu(

browser/base/content/test/contextMenu/subtst_contextmenu.html

@@ -17,10 +17,6 @@ if ("ShadowRoot" in this) {
 }
 </script>
 <a id="test-mailto" href="mailto:codemonkey@mozilla.com">Mail the monkey!</a><br>
-<div id="test-paste-listener" onpaste="doSomething()">
-  ABCD
-  <p id="test-paste-listener-child">EFGH</p>
-</div>
 <input id="test-input"><br>
 <img id="test-image" src="ctxmenu-image.png">
 <svg>