Backed out changeset 3855f8235011 (bug 1617948) for causing mochitest plain failures in test_get_all_style_sheets. CLOSED TREE

dom/base/DocumentOrShadowRoot.cpp

@@ -203,7 +203,7 @@ void DocumentOrShadowRoot::ClearAdoptedStyleSheets() {
 
 void DocumentOrShadowRoot::CloneAdoptedSheetsFrom(
     const DocumentOrShadowRoot& aSource) {
-  if (aSource.mAdoptedStyleSheets.IsEmpty()) {
+  if (!aSource.AdoptedSheetCount()) {
     return;
   }
 

dom/base/DocumentOrShadowRoot.h

@@ -76,9 +76,7 @@ class DocumentOrShadowRoot : public RadioGroupManager {
 
   size_t SheetCount() const { return mStyleSheets.Length(); }
 
-  const nsTArray<RefPtr<StyleSheet>>& AdoptedStyleSheets() const {
-    return mAdoptedStyleSheets;
-  }
+  size_t AdoptedSheetCount() const { return mAdoptedStyleSheets.Length(); }
 
   /**
    * Returns an index for the sheet in relative style order.

layout/inspector/InspectorUtils.cpp

@@ -83,7 +83,6 @@ void InspectorUtils::GetAllStyleSheets(GlobalObject& aGlobalObject,
                                        nsTArray<RefPtr<StyleSheet>>& aResult) {
   // Get the agent, then user and finally xbl sheets in the style set.
   PresShell* presShell = aDocument.GetPresShell();
-  nsTHashSet<StyleSheet*> sheetSet;
 
   if (presShell) {
     ServoStyleSet* styleSet = presShell->StyleSet();
@@ -102,8 +101,8 @@ void InspectorUtils::GetAllStyleSheets(GlobalObject& aGlobalObject,
     AutoTArray<StyleSheet*, 32> nonDocumentSheets;
     styleSet->AppendAllNonDocumentAuthorSheets(nonDocumentSheets);
 
-    // The non-document stylesheet array can have duplicates due to adopted
-    // stylesheets.
+    // The non-document stylesheet array can't have duplicates right now, but it
+    // could once we include adopted stylesheets.
     nsTHashSet<StyleSheet*> sheetSet;
     for (StyleSheet* sheet : nonDocumentSheets) {
       if (sheetSet.EnsureInserted(sheet)) {
@@ -117,11 +116,9 @@ void InspectorUtils::GetAllStyleSheets(GlobalObject& aGlobalObject,
     aResult.AppendElement(aDocument.SheetAt(i));
   }
 
-  for (auto& sheet : aDocument.AdoptedStyleSheets()) {
-    if (sheetSet.EnsureInserted(sheet)) {
-      aResult.AppendElement(sheet);
-    }
-  }
+  // FIXME(emilio, bug 1617948): This doesn't deal with adopted stylesheets, and
+  // it should. It should also handle duplicates correctly when it does, see
+  // above.
 }
 
 bool InspectorUtils::IsIgnorableWhitespace(CharacterData& aDataNode) {

layout/inspector/ServoStyleRuleMap.cpp

@@ -37,9 +37,6 @@ void ServoStyleRuleMap::EnsureTable(ShadowRoot& aShadowRoot) {
   for (auto index : IntegerRange(aShadowRoot.SheetCount())) {
     FillTableFromStyleSheet(*aShadowRoot.SheetAt(index));
   }
-  for (auto& sheet : aShadowRoot.AdoptedStyleSheets()) {
-    FillTableFromStyleSheet(*sheet);
-  }
 }
 
 void ServoStyleRuleMap::SheetAdded(StyleSheet& aStyleSheet) {

layout/inspector/tests/test_getCSSStyleRules.html

@@ -171,20 +171,9 @@ const tests = [
          "declaration from UA stylesheet html.css");
     },
   },
-  {
-    title: "Check adopted sheets",
-    async run(doc, win) {
-      checkRules(doc, [1]);
-      let sheet = new win.CSSStyleSheet();
-      sheet.replaceSync(`unknowntagname { z-index: 5 }`);
-      doc.adoptedStyleSheets.push(sheet);
-      checkRules(doc, [1, 5]);
-    },
-  },
 ];
 
-add_task(async function runTests() {
-  await SpecialPowers.pushPrefEnv({ set: [["layout.css.constructable-stylesheets.enabled", true]] });
+async function runTests() {
   for (let i = 0; i < tests.length; i++) {
     let test = tests[i];
     info(`Test ${i}: ${test.title}`);
@@ -195,12 +184,16 @@ add_task(async function runTests() {
     iframe.src = `file_getCSSStyleRules-${test.base}.html`;
     await new Promise(resolve => { iframe.onload = resolve; });
     try {
-      await test.run(iframe.contentDocument, iframe.contentWindow);
+      await test.run(iframe.contentDocument);
     } catch (e) {
       ok(false, "JavaScript error: " + e);
     }
   }
-});
+  SimpleTest.finish();
+}
+
+runTests();
+
 </script>
 </pre>
 </body>

layout/inspector/tests/test_get_all_style_sheets.html

@@ -1,40 +1,44 @@
 <!DOCTYPE HTML>
+<html>
 <!--
 https://bugzilla.mozilla.org/show_bug.cgi?id=734861
 -->
-<meta charset="utf-8">
-<title>Test for Bug 734861</title>
-<script src="/tests/SimpleTest/SimpleTest.js"></script>
-<link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
-<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=734861">Mozilla Bug 734861</a>
-<div id="host"></div>
-<script>
-/** Test for Bug 734861 **/
-const InspectorUtils = SpecialPowers.InspectorUtils;
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 734861</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script type="application/javascript">
 
-add_task(async function() {
-  await SpecialPowers.pushPrefEnv({ set: [["layout.css.constructable-stylesheets.enabled", true]] });
-  let sheet = new CSSStyleSheet();
-  await sheet.replace(`* { color: blue }`);
+  /** Test for Bug 734861 **/
 
-  let host = document.querySelector("#host");
-  host.adoptedStyleSheets = [sheet, sheet];
-  document.adoptedStyleSheets.push(sheet);
+  const InspectorUtils = SpecialPowers.InspectorUtils;
 
-  let res = InspectorUtils.getAllStyleSheets(document);
+  SimpleTest.waitForExplicitFinish();
 
-  let foundUA = false;
-  let adoptedCount = 0;
-  for (let s of InspectorUtils.getAllStyleSheets(document)) {
-    if (SpecialPowers.unwrap(s) == sheet) {
-      adoptedCount++;
-    }
-    if (s.href === "resource://gre-resources/ua.css") {
-      foundUA = true;
+  function runTest() {
+    var res = InspectorUtils.getAllStyleSheets(document);
+
+    var foundUA = false;
+    for (var i = 0; i < res.length; i++) {
+      if (res[i].href === "resource://gre-resources/ua.css") {
+        foundUA = true;
+        break;
+      }
     }
+    ok(foundUA, "UA sheet should be returned with all the other sheets.");
+    SimpleTest.finish();
   }
 
-  ok(foundUA, "UA sheet should be returned with all the other sheets.");
-  is(adoptedCount, 1, "Adopted stylesheet should show up once");
-});
-</script>
+  </script>
+</head>
+<body onload="runTest();">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=734861">Mozilla Bug 734861</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>

layout/style/ServoStyleSet.cpp

@@ -662,7 +662,6 @@ void ServoStyleSet::AppendAllNonDocumentAuthorSheets(
     for (auto index : IntegerRange(aShadowRoot.SheetCount())) {
       aArray.AppendElement(aShadowRoot.SheetAt(index));
     }
-    aArray.AppendElements(aShadowRoot.AdoptedStyleSheets());
   });
 }
 
@@ -1072,22 +1071,11 @@ bool ServoStyleSet::EnsureUniqueInnerOnCSSSheets() {
       queue.AppendElement(
           std::make_pair(aShadowRoot.SheetAt(index), SheetOwner{&aShadowRoot}));
     }
-    for (auto& adopted : aShadowRoot.AdoptedStyleSheets()) {
-      queue.AppendElement(
-          std::make_pair(adopted.get(), SheetOwner{&aShadowRoot}));
-    }
   });
 
   while (!queue.IsEmpty()) {
     auto [sheet, owner] = queue.PopLastElement();
 
-    if (sheet->HasForcedUniqueInner()) {
-      // We already processed this sheet and its children.
-      // Normally we don't hit this but adopted stylesheets can have dupes so we
-      // can save some work here.
-      continue;
-    }
-
     // Only call EnsureUniqueInner for complete sheets. If we do call it on
     // incomplete sheets, we'll cause problems when the sheet is actually
     // loaded. We don't care about incomplete sheets here anyway, because this