Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 925 insertions, 0 deletions

diff --git a/accessible/base/Logging.cpp b/accessible/base/Logging.cpp
new file mode 100644
index 0000000000..c6caaa3827
--- /dev/null
+++ b/accessible/base/Logging.cpp
@@ -0,0 +1,925 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "Logging.h"
+
+#include "Accessible-inl.h"
+#include "AccEvent.h"
+#include "DocAccessible.h"
+#include "nsAccessibilityService.h"
+#include "nsCoreUtils.h"
+#include "OuterDocAccessible.h"
+
+#include "nsDocShellLoadTypes.h"
+#include "nsIChannel.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsTraceRefcnt.h"
+#include "nsIWebProgress.h"
+#include "prenv.h"
+#include "nsIDocShellTreeItem.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/dom/BorrowedAttrInfo.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/HTMLBodyElement.h"
+#include "mozilla/dom/Selection.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+using mozilla::dom::BorrowedAttrInfo;
+
+////////////////////////////////////////////////////////////////////////////////
+// Logging helpers
+
+static uint32_t sModules = 0;
+
+struct ModuleRep {
+  const char* mStr;
+  logging::EModules mModule;
+};
+
+static ModuleRep sModuleMap[] = {{"docload", logging::eDocLoad},
+                                 {"doccreate", logging::eDocCreate},
+                                 {"docdestroy", logging::eDocDestroy},
+                                 {"doclifecycle", logging::eDocLifeCycle},
+
+                                 {"events", logging::eEvents},
+                                 {"eventTree", logging::eEventTree},
+                                 {"platforms", logging::ePlatforms},
+                                 {"text", logging::eText},
+                                 {"tree", logging::eTree},
+
+                                 {"DOMEvents", logging::eDOMEvents},
+                                 {"focus", logging::eFocus},
+                                 {"selection", logging::eSelection},
+                                 {"notifications", logging::eNotifications},
+
+                                 {"stack", logging::eStack},
+                                 {"verbose", logging::eVerbose}};
+
+static void EnableLogging(const char* aModulesStr) {
+  sModules = 0;
+  if (!aModulesStr) return;
+
+  const char* token = aModulesStr;
+  while (*token != '\0') {
+    size_t tokenLen = strcspn(token, ",");
+    for (unsigned int idx = 0; idx < ArrayLength(sModuleMap); idx++) {
+      if (strncmp(token, sModuleMap[idx].mStr, tokenLen) == 0) {
+#if !defined(MOZ_PROFILING) && (!defined(DEBUG) || defined(MOZ_OPTIMIZE))
+        // Stack tracing on profiling enabled or debug not optimized builds.
+        if (strncmp(token, "stack", tokenLen) == 0) break;
+#endif
+        sModules |= sModuleMap[idx].mModule;
+        printf("\n\nmodule enabled: %s\n", sModuleMap[idx].mStr);
+        break;
+      }
+    }
+    token += tokenLen;
+
+    if (*token == ',') token++;  // skip ',' char
+  }
+}
+
+static void LogDocURI(dom::Document* aDocumentNode) {
+  printf("uri: %s", aDocumentNode->GetDocumentURI()->GetSpecOrDefault().get());
+}
+
+static void LogDocShellState(dom::Document* aDocumentNode) {
+  printf("docshell busy: ");
+
+  nsAutoCString docShellBusy;
+  nsCOMPtr<nsIDocShell> docShell = aDocumentNode->GetDocShell();
+  nsIDocShell::BusyFlags busyFlags = nsIDocShell::BUSY_FLAGS_NONE;
+  docShell->GetBusyFlags(&busyFlags);
+  if (busyFlags == nsIDocShell::BUSY_FLAGS_NONE) {
+    printf("'none'");
+  }
+  if (busyFlags & nsIDocShell::BUSY_FLAGS_BUSY) {
+    printf("'busy'");
+  }
+  if (busyFlags & nsIDocShell::BUSY_FLAGS_BEFORE_PAGE_LOAD) {
+    printf(", 'before page load'");
+  }
+  if (busyFlags & nsIDocShell::BUSY_FLAGS_PAGE_LOADING) {
+    printf(", 'page loading'");
+  }
+}
+
+static void LogDocType(dom::Document* aDocumentNode) {
+  if (aDocumentNode->IsActive()) {
+    bool isContent = nsCoreUtils::IsContentDocument(aDocumentNode);
+    printf("%s document", (isContent ? "content" : "chrome"));
+  } else {
+    printf("document type: [failed]");
+  }
+}
+
+static void LogDocShellTree(dom::Document* aDocumentNode) {
+  if (aDocumentNode->IsActive()) {
+    nsCOMPtr<nsIDocShellTreeItem> treeItem(aDocumentNode->GetDocShell());
+    nsCOMPtr<nsIDocShellTreeItem> parentTreeItem;
+    treeItem->GetInProcessParent(getter_AddRefs(parentTreeItem));
+    nsCOMPtr<nsIDocShellTreeItem> rootTreeItem;
+    treeItem->GetInProcessRootTreeItem(getter_AddRefs(rootTreeItem));
+    printf(
+        "in-process docshell hierarchy, parent: %p, root: %p, "
+        "is top level: %s;",
+        static_cast<void*>(parentTreeItem), static_cast<void*>(rootTreeItem),
+        (nsCoreUtils::IsTopLevelContentDocInProcess(aDocumentNode) ? "yes"
+                                                                   : "no"));
+  }
+}
+
+static void LogDocState(dom::Document* aDocumentNode) {
+  const char* docState = nullptr;
+  dom::Document::ReadyState docStateFlag = aDocumentNode->GetReadyStateEnum();
+  switch (docStateFlag) {
+    case dom::Document::READYSTATE_UNINITIALIZED:
+      docState = "uninitialized";
+      break;
+    case dom::Document::READYSTATE_LOADING:
+      docState = "loading";
+      break;
+    case dom::Document::READYSTATE_INTERACTIVE:
+      docState = "interactive";
+      break;
+    case dom::Document::READYSTATE_COMPLETE:
+      docState = "complete";
+      break;
+  }
+
+  printf("doc state: %s", docState);
+  printf(", %sinitial", aDocumentNode->IsInitialDocument() ? "" : "not ");
+  printf(", %sshowing", aDocumentNode->IsShowing() ? "" : "not ");
+  printf(", %svisible", aDocumentNode->IsVisible() ? "" : "not ");
+  printf(", %svisible considering ancestors",
+         aDocumentNode->IsVisibleConsideringAncestors() ? "" : "not ");
+  printf(", %sactive", aDocumentNode->IsActive() ? "" : "not ");
+  printf(", %sresource", aDocumentNode->IsResourceDoc() ? "" : "not ");
+
+  dom::Element* rootEl = aDocumentNode->GetBodyElement();
+  if (!rootEl) {
+    rootEl = aDocumentNode->GetRootElement();
+  }
+  printf(", has %srole content", rootEl ? "" : "no ");
+}
+
+static void LogPresShell(dom::Document* aDocumentNode) {
+  PresShell* presShell = aDocumentNode->GetPresShell();
+  printf("presshell: %p", static_cast<void*>(presShell));
+
+  nsIScrollableFrame* sf = nullptr;
+  if (presShell) {
+    printf(", is %s destroying", (presShell->IsDestroying() ? "" : "not"));
+    sf = presShell->GetRootScrollFrameAsScrollable();
+  }
+  printf(", root scroll frame: %p", static_cast<void*>(sf));
+}
+
+static void LogDocLoadGroup(dom::Document* aDocumentNode) {
+  nsCOMPtr<nsILoadGroup> loadGroup = aDocumentNode->GetDocumentLoadGroup();
+  printf("load group: %p", static_cast<void*>(loadGroup));
+}
+
+static void LogDocParent(dom::Document* aDocumentNode) {
+  dom::Document* parentDoc = aDocumentNode->GetInProcessParentDocument();
+  printf("parent DOM document: %p", static_cast<void*>(parentDoc));
+  if (parentDoc) {
+    printf(", parent acc document: %p",
+           static_cast<void*>(GetExistingDocAccessible(parentDoc)));
+    printf("\n    parent ");
+    LogDocURI(parentDoc);
+    printf("\n");
+  }
+}
+
+static void LogDocInfo(dom::Document* aDocumentNode, DocAccessible* aDocument) {
+  printf("    DOM document: %p, acc document: %p\n    ",
+         static_cast<void*>(aDocumentNode), static_cast<void*>(aDocument));
+
+  // log document info
+  if (aDocumentNode) {
+    LogDocURI(aDocumentNode);
+    printf("\n    ");
+    LogDocShellState(aDocumentNode);
+    printf("; ");
+    LogDocType(aDocumentNode);
+    printf("\n    ");
+    LogDocShellTree(aDocumentNode);
+    printf("\n    ");
+    LogDocState(aDocumentNode);
+    printf("\n    ");
+    LogPresShell(aDocumentNode);
+    printf("\n    ");
+    LogDocLoadGroup(aDocumentNode);
+    printf(", ");
+    LogDocParent(aDocumentNode);
+    printf("\n");
+  }
+}
+
+static void LogShellLoadType(nsIDocShell* aDocShell) {
+  printf("load type: ");
+
+  uint32_t loadType = 0;
+  aDocShell->GetLoadType(&loadType);
+  switch (loadType) {
+    case LOAD_NORMAL:
+      printf("normal; ");
+      break;
+    case LOAD_NORMAL_REPLACE:
+      printf("normal replace; ");
+      break;
+    case LOAD_NORMAL_EXTERNAL:
+      printf("normal external; ");
+      break;
+    case LOAD_HISTORY:
+      printf("history; ");
+      break;
+    case LOAD_NORMAL_BYPASS_CACHE:
+      printf("normal bypass cache; ");
+      break;
+    case LOAD_NORMAL_BYPASS_PROXY:
+      printf("normal bypass proxy; ");
+      break;
+    case LOAD_NORMAL_BYPASS_PROXY_AND_CACHE:
+      printf("normal bypass proxy and cache; ");
+      break;
+    case LOAD_NORMAL_ALLOW_MIXED_CONTENT:
+      printf("normal allow mixed content; ");
+      break;
+    case LOAD_RELOAD_NORMAL:
+      printf("reload normal; ");
+      break;
+    case LOAD_RELOAD_BYPASS_CACHE:
+      printf("reload bypass cache; ");
+      break;
+    case LOAD_RELOAD_BYPASS_PROXY:
+      printf("reload bypass proxy; ");
+      break;
+    case LOAD_RELOAD_BYPASS_PROXY_AND_CACHE:
+      printf("reload bypass proxy and cache; ");
+      break;
+    case LOAD_RELOAD_ALLOW_MIXED_CONTENT:
+      printf("reload allow mixed content; ");
+      break;
+    case LOAD_LINK:
+      printf("link; ");
+      break;
+    case LOAD_REFRESH:
+      printf("refresh; ");
+      break;
+    case LOAD_RELOAD_CHARSET_CHANGE:
+      printf("reload charset change; ");
+      break;
+    case LOAD_BYPASS_HISTORY:
+      printf("bypass history; ");
+      break;
+    case LOAD_STOP_CONTENT:
+      printf("stop content; ");
+      break;
+    case LOAD_STOP_CONTENT_AND_REPLACE:
+      printf("stop content and replace; ");
+      break;
+    case LOAD_PUSHSTATE:
+      printf("load pushstate; ");
+      break;
+    case LOAD_REPLACE_BYPASS_CACHE:
+      printf("replace bypass cache; ");
+      break;
+    case LOAD_ERROR_PAGE:
+      printf("error page;");
+      break;
+    default:
+      printf("unknown");
+  }
+}
+
+static void LogRequest(nsIRequest* aRequest) {
+  if (aRequest) {
+    nsAutoCString name;
+    aRequest->GetName(name);
+    printf("    request spec: %s\n", name.get());
+    uint32_t loadFlags = 0;
+    aRequest->GetLoadFlags(&loadFlags);
+    printf("    request load flags: %x; ", loadFlags);
+    if (loadFlags & nsIChannel::LOAD_DOCUMENT_URI) printf("document uri; ");
+    if (loadFlags & nsIChannel::LOAD_RETARGETED_DOCUMENT_URI)
+      printf("retargeted document uri; ");
+    if (loadFlags & nsIChannel::LOAD_REPLACE) printf("replace; ");
+    if (loadFlags & nsIChannel::LOAD_INITIAL_DOCUMENT_URI)
+      printf("initial document uri; ");
+    if (loadFlags & nsIChannel::LOAD_TARGETED) printf("targeted; ");
+    if (loadFlags & nsIChannel::LOAD_CALL_CONTENT_SNIFFERS)
+      printf("call content sniffers; ");
+    if (loadFlags & nsIChannel::LOAD_BYPASS_URL_CLASSIFIER) {
+      printf("bypass classify uri; ");
+    }
+  } else {
+    printf("    no request");
+  }
+}
+
+static void LogDocAccState(DocAccessible* aDocument) {
+  printf("document acc state: ");
+  if (aDocument->HasLoadState(DocAccessible::eCompletelyLoaded))
+    printf("completely loaded;");
+  else if (aDocument->HasLoadState(DocAccessible::eReady))
+    printf("ready;");
+  else if (aDocument->HasLoadState(DocAccessible::eDOMLoaded))
+    printf("DOM loaded;");
+  else if (aDocument->HasLoadState(DocAccessible::eTreeConstructed))
+    printf("tree constructed;");
+}
+
+static void GetDocLoadEventType(AccEvent* aEvent, nsACString& aEventType) {
+  uint32_t type = aEvent->GetEventType();
+  if (type == nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_STOPPED) {
+    aEventType.AssignLiteral("load stopped");
+  } else if (type == nsIAccessibleEvent::EVENT_DOCUMENT_LOAD_COMPLETE) {
+    aEventType.AssignLiteral("load complete");
+  } else if (type == nsIAccessibleEvent::EVENT_DOCUMENT_RELOAD) {
+    aEventType.AssignLiteral("reload");
+  } else if (type == nsIAccessibleEvent::EVENT_STATE_CHANGE) {
+    AccStateChangeEvent* event = downcast_accEvent(aEvent);
+    if (event->GetState() == states::BUSY) {
+      aEventType.AssignLiteral("busy ");
+      if (event->IsStateEnabled())
+        aEventType.AppendLiteral("true");
+      else
+        aEventType.AppendLiteral("false");
+    }
+  }
+}
+
+static void DescribeNode(nsINode* aNode, nsAString& aOutDescription) {
+  if (!aNode) {
+    aOutDescription.AppendLiteral("null");
+    return;
+  }
+
+  aOutDescription.AppendPrintf("0x%p, ", (void*)aNode);
+  aOutDescription.Append(aNode->NodeInfo()->QualifiedName());
+
+  if (!aNode->IsElement()) {
+    return;
+  }
+
+  dom::Element* elm = aNode->AsElement();
+
+  nsAtom* idAtom = elm->GetID();
+  if (idAtom) {
+    nsAutoCString id;
+    idAtom->ToUTF8String(id);
+    aOutDescription.AppendPrintf("@id=\"%s\" ", id.get());
+  } else {
+    aOutDescription.Append(' ');
+  }
+
+  uint32_t attrCount = elm->GetAttrCount();
+  if (!attrCount || (idAtom && attrCount == 1)) {
+    return;
+  }
+
+  aOutDescription.AppendLiteral("[ ");
+
+  for (uint32_t index = 0; index < attrCount; index++) {
+    BorrowedAttrInfo info = elm->GetAttrInfoAt(index);
+
+    // Skip redundant display of id attribute.
+    if (info.mName->Equals(nsGkAtoms::id)) {
+      continue;
+    }
+
+    // name
+    nsAutoString name;
+    info.mName->GetQualifiedName(name);
+    aOutDescription.Append(name);
+
+    aOutDescription.AppendLiteral("=\"");
+
+    // value
+    nsAutoString value;
+    info.mValue->ToString(value);
+    for (uint32_t i = value.Length(); i > 0; --i) {
+      if (value[i - 1] == char16_t('"')) value.Insert(char16_t('\\'), i - 1);
+    }
+    aOutDescription.Append(value);
+    aOutDescription.AppendLiteral("\" ");
+  }
+
+  aOutDescription.Append(']');
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// namespace logging:: document life cycle logging methods
+
+static const char* sDocLoadTitle = "DOCLOAD";
+static const char* sDocCreateTitle = "DOCCREATE";
+static const char* sDocDestroyTitle = "DOCDESTROY";
+static const char* sDocEventTitle = "DOCEVENT";
+static const char* sFocusTitle = "FOCUS";
+
+void logging::DocLoad(const char* aMsg, nsIWebProgress* aWebProgress,
+                      nsIRequest* aRequest, uint32_t aStateFlags) {
+  MsgBegin(sDocLoadTitle, "%s", aMsg);
+
+  nsCOMPtr<mozIDOMWindowProxy> DOMWindow;
+  aWebProgress->GetDOMWindow(getter_AddRefs(DOMWindow));
+  nsPIDOMWindowOuter* window = nsPIDOMWindowOuter::From(DOMWindow);
+  if (!window) {
+    MsgEnd();
+    return;
+  }
+
+  nsCOMPtr<dom::Document> documentNode = window->GetDoc();
+  if (!documentNode) {
+    MsgEnd();
+    return;
+  }
+
+  DocAccessible* document = GetExistingDocAccessible(documentNode);
+
+  LogDocInfo(documentNode, document);
+
+  nsCOMPtr<nsIDocShell> docShell = window->GetDocShell();
+  printf("\n    ");
+  LogShellLoadType(docShell);
+  printf("\n");
+  LogRequest(aRequest);
+  printf("\n");
+  printf("    state flags: %x", aStateFlags);
+  bool isDocLoading;
+  aWebProgress->GetIsLoadingDocument(&isDocLoading);
+  printf(", document is %sloading\n", (isDocLoading ? "" : "not "));
+
+  MsgEnd();
+}
+
+void logging::DocLoad(const char* aMsg, dom::Document* aDocumentNode) {
+  MsgBegin(sDocLoadTitle, "%s", aMsg);
+
+  DocAccessible* document = GetExistingDocAccessible(aDocumentNode);
+  LogDocInfo(aDocumentNode, document);
+
+  MsgEnd();
+}
+
+void logging::DocCompleteLoad(DocAccessible* aDocument,
+                              bool aIsLoadEventTarget) {
+  MsgBegin(sDocLoadTitle, "document loaded *completely*");
+
+  printf("    DOM document: %p, acc document: %p\n",
+         static_cast<void*>(aDocument->DocumentNode()),
+         static_cast<void*>(aDocument));
+
+  printf("    ");
+  LogDocURI(aDocument->DocumentNode());
+  printf("\n");
+
+  printf("    ");
+  LogDocAccState(aDocument);
+  printf("\n");
+
+  printf("    document is load event target: %s\n",
+         (aIsLoadEventTarget ? "true" : "false"));
+
+  MsgEnd();
+}
+
+void logging::DocLoadEventFired(AccEvent* aEvent) {
+  nsAutoCString strEventType;
+  GetDocLoadEventType(aEvent, strEventType);
+  if (!strEventType.IsEmpty()) printf("  fire: %s\n", strEventType.get());
+}
+
+void logging::DocLoadEventHandled(AccEvent* aEvent) {
+  nsAutoCString strEventType;
+  GetDocLoadEventType(aEvent, strEventType);
+  if (strEventType.IsEmpty()) return;
+
+  MsgBegin(sDocEventTitle, "handled '%s' event", strEventType.get());
+
+  DocAccessible* document = aEvent->GetAccessible()->AsDoc();
+  if (document) LogDocInfo(document->DocumentNode(), document);
+
+  MsgEnd();
+}
+
+void logging::DocCreate(const char* aMsg, dom::Document* aDocumentNode,
+                        DocAccessible* aDocument) {
+  DocAccessible* document =
+      aDocument ? aDocument : GetExistingDocAccessible(aDocumentNode);
+
+  MsgBegin(sDocCreateTitle, "%s", aMsg);
+  LogDocInfo(aDocumentNode, document);
+  MsgEnd();
+}
+
+void logging::DocDestroy(const char* aMsg, dom::Document* aDocumentNode,
+                         DocAccessible* aDocument) {
+  DocAccessible* document =
+      aDocument ? aDocument : GetExistingDocAccessible(aDocumentNode);
+
+  MsgBegin(sDocDestroyTitle, "%s", aMsg);
+  LogDocInfo(aDocumentNode, document);
+  MsgEnd();
+}
+
+void logging::OuterDocDestroy(OuterDocAccessible* aOuterDoc) {
+  MsgBegin(sDocDestroyTitle, "outerdoc shutdown");
+  logging::Address("outerdoc", aOuterDoc);
+  MsgEnd();
+}
+
+void logging::FocusNotificationTarget(const char* aMsg,
+                                      const char* aTargetDescr,
+                                      Accessible* aTarget) {
+  MsgBegin(sFocusTitle, "%s", aMsg);
+  AccessibleNNode(aTargetDescr, aTarget);
+  MsgEnd();
+}
+
+void logging::FocusNotificationTarget(const char* aMsg,
+                                      const char* aTargetDescr,
+                                      nsINode* aTargetNode) {
+  MsgBegin(sFocusTitle, "%s", aMsg);
+  Node(aTargetDescr, aTargetNode);
+  MsgEnd();
+}
+
+void logging::FocusNotificationTarget(const char* aMsg,
+                                      const char* aTargetDescr,
+                                      nsISupports* aTargetThing) {
+  MsgBegin(sFocusTitle, "%s", aMsg);
+
+  if (aTargetThing) {
+    nsCOMPtr<nsINode> targetNode(do_QueryInterface(aTargetThing));
+    if (targetNode)
+      AccessibleNNode(aTargetDescr, targetNode);
+    else
+      printf("    %s: %p, window\n", aTargetDescr,
+             static_cast<void*>(aTargetThing));
+  }
+
+  MsgEnd();
+}
+
+void logging::ActiveItemChangeCausedBy(const char* aCause,
+                                       Accessible* aTarget) {
+  SubMsgBegin();
+  printf("    Caused by: %s\n", aCause);
+  AccessibleNNode("Item", aTarget);
+  SubMsgEnd();
+}
+
+void logging::ActiveWidget(Accessible* aWidget) {
+  SubMsgBegin();
+
+  AccessibleNNode("Widget", aWidget);
+  printf("    Widget is active: %s, has operable items: %s\n",
+         (aWidget && aWidget->IsActiveWidget() ? "true" : "false"),
+         (aWidget && aWidget->AreItemsOperable() ? "true" : "false"));
+
+  SubMsgEnd();
+}
+
+void logging::FocusDispatched(Accessible* aTarget) {
+  SubMsgBegin();
+  AccessibleNNode("A11y target", aTarget);
+  SubMsgEnd();
+}
+
+void logging::SelChange(dom::Selection* aSelection, DocAccessible* aDocument,
+                        int16_t aReason) {
+  SelectionType type = aSelection->GetType();
+
+  const char* strType = 0;
+  if (type == SelectionType::eNormal)
+    strType = "normal";
+  else if (type == SelectionType::eSpellCheck)
+    strType = "spellcheck";
+  else
+    strType = "unknown";
+
+  bool isIgnored = !aDocument || !aDocument->IsContentLoaded();
+  printf(
+      "\nSelection changed, selection type: %s, notification %s, reason: %d\n",
+      strType, (isIgnored ? "ignored" : "pending"), aReason);
+
+  Stack();
+}
+
+void logging::TreeInfo(const char* aMsg, uint32_t aExtraFlags, ...) {
+  if (IsEnabledAll(logging::eTree | aExtraFlags)) {
+    va_list vl;
+    va_start(vl, aExtraFlags);
+    const char* descr = va_arg(vl, const char*);
+    if (descr) {
+      Accessible* acc = va_arg(vl, Accessible*);
+      MsgBegin("TREE", "%s; doc: %p", aMsg, acc ? acc->Document() : nullptr);
+      AccessibleInfo(descr, acc);
+      while ((descr = va_arg(vl, const char*))) {
+        AccessibleInfo(descr, va_arg(vl, Accessible*));
+      }
+    } else {
+      MsgBegin("TREE", "%s", aMsg);
+    }
+    va_end(vl);
+    MsgEnd();
+
+    if (aExtraFlags & eStack) {
+      Stack();
+    }
+  }
+}
+
+void logging::TreeInfo(const char* aMsg, uint32_t aExtraFlags,
+                       const char* aMsg1, Accessible* aAcc, const char* aMsg2,
+                       nsINode* aNode) {
+  if (IsEnabledAll(logging::eTree | aExtraFlags)) {
+    MsgBegin("TREE", "%s; doc: %p", aMsg, aAcc ? aAcc->Document() : nullptr);
+    AccessibleInfo(aMsg1, aAcc);
+    Accessible* acc = aAcc ? aAcc->Document()->GetAccessible(aNode) : nullptr;
+    if (acc) {
+      AccessibleInfo(aMsg2, acc);
+    } else {
+      Node(aMsg2, aNode);
+    }
+    MsgEnd();
+  }
+}
+
+void logging::TreeInfo(const char* aMsg, uint32_t aExtraFlags,
+                       Accessible* aParent) {
+  if (IsEnabledAll(logging::eTree | aExtraFlags)) {
+    MsgBegin("TREE", "%s; doc: %p", aMsg, aParent->Document());
+    AccessibleInfo("container", aParent);
+    for (uint32_t idx = 0; idx < aParent->ChildCount(); idx++) {
+      AccessibleInfo("child", aParent->GetChildAt(idx));
+    }
+    MsgEnd();
+  }
+}
+
+void logging::Tree(const char* aTitle, const char* aMsgText, Accessible* aRoot,
+                   GetTreePrefix aPrefixFunc, void* aGetTreePrefixData) {
+  logging::MsgBegin(aTitle, "%s", aMsgText);
+
+  nsAutoString level;
+  Accessible* root = aRoot;
+  do {
+    const char* prefix =
+        aPrefixFunc ? aPrefixFunc(aGetTreePrefixData, root) : "";
+    printf("%s", NS_ConvertUTF16toUTF8(level).get());
+    logging::AccessibleInfo(prefix, root);
+    if (root->FirstChild() && !root->FirstChild()->IsDoc()) {
+      level.AppendLiteral(u"  ");
+      root = root->FirstChild();
+      continue;
+    }
+    int32_t idxInParent = root != aRoot && root->mParent
+                              ? root->mParent->mChildren.IndexOf(root)
+                              : -1;
+    if (idxInParent != -1 &&
+        idxInParent <
+            static_cast<int32_t>(root->mParent->mChildren.Length() - 1)) {
+      root = root->mParent->mChildren.ElementAt(idxInParent + 1);
+      continue;
+    }
+    while (root != aRoot && (root = root->Parent())) {
+      level.Cut(0, 2);
+      int32_t idxInParent = !root->IsDoc() && root->mParent
+                                ? root->mParent->mChildren.IndexOf(root)
+                                : -1;
+      if (idxInParent != -1 &&
+          idxInParent <
+              static_cast<int32_t>(root->mParent->mChildren.Length() - 1)) {
+        root = root->mParent->mChildren.ElementAt(idxInParent + 1);
+        break;
+      }
+    }
+  } while (root && root != aRoot);
+
+  logging::MsgEnd();
+}
+
+void logging::DOMTree(const char* aTitle, const char* aMsgText,
+                      DocAccessible* aDocument) {
+  logging::MsgBegin(aTitle, "%s", aMsgText);
+  nsAutoString level;
+  nsINode* root = aDocument->DocumentNode();
+  do {
+    printf("%s", NS_ConvertUTF16toUTF8(level).get());
+    logging::Node("", root);
+    if (root->GetFirstChild()) {
+      level.AppendLiteral(u"  ");
+      root = root->GetFirstChild();
+      continue;
+    }
+    if (root->GetNextSibling()) {
+      root = root->GetNextSibling();
+      continue;
+    }
+    while ((root = root->GetParentNode())) {
+      level.Cut(0, 2);
+      if (root->GetNextSibling()) {
+        root = root->GetNextSibling();
+        break;
+      }
+    }
+  } while (root);
+  logging::MsgEnd();
+}
+
+void logging::MsgBegin(const char* aTitle, const char* aMsgText, ...) {
+  printf("\nA11Y %s: ", aTitle);
+
+  va_list argptr;
+  va_start(argptr, aMsgText);
+  vprintf(aMsgText, argptr);
+  va_end(argptr);
+
+  PRIntervalTime time = PR_IntervalNow();
+  uint32_t mins = (PR_IntervalToSeconds(time) / 60) % 60;
+  uint32_t secs = PR_IntervalToSeconds(time) % 60;
+  uint32_t msecs = PR_IntervalToMilliseconds(time) % 1000;
+  printf("; %02u:%02u.%03u", mins, secs, msecs);
+
+  printf("\n  {\n");
+}
+
+void logging::MsgEnd() { printf("  }\n"); }
+
+void logging::SubMsgBegin() { printf("  {\n"); }
+
+void logging::SubMsgEnd() { printf("  }\n"); }
+
+void logging::MsgEntry(const char* aEntryText, ...) {
+  printf("    ");
+
+  va_list argptr;
+  va_start(argptr, aEntryText);
+  vprintf(aEntryText, argptr);
+  va_end(argptr);
+
+  printf("\n");
+}
+
+void logging::Text(const char* aText) { printf("  %s\n", aText); }
+
+void logging::Address(const char* aDescr, Accessible* aAcc) {
+  if (!aAcc->IsDoc()) {
+    printf("    %s accessible: %p, node: %p\n", aDescr,
+           static_cast<void*>(aAcc), static_cast<void*>(aAcc->GetNode()));
+  }
+
+  DocAccessible* doc = aAcc->Document();
+  dom::Document* docNode = doc->DocumentNode();
+  printf("    document: %p, node: %p\n", static_cast<void*>(doc),
+         static_cast<void*>(docNode));
+
+  printf("    ");
+  LogDocURI(docNode);
+  printf("\n");
+}
+
+void logging::Node(const char* aDescr, nsINode* aNode) {
+  nsINode* parentNode = aNode ? aNode->GetParentNode() : nullptr;
+  int32_t idxInParent = parentNode ? parentNode->ComputeIndexOf(aNode) : -1;
+
+  nsAutoString nodeDesc;
+  DescribeNode(aNode, nodeDesc);
+  printf("    %s: %s, idx in parent %d\n", aDescr,
+         NS_ConvertUTF16toUTF8(nodeDesc).get(), idxInParent);
+}
+
+void logging::Document(DocAccessible* aDocument) {
+  printf("    Document: %p, document node: %p\n", static_cast<void*>(aDocument),
+         static_cast<void*>(aDocument->DocumentNode()));
+
+  printf("    Document ");
+  LogDocURI(aDocument->DocumentNode());
+  printf("\n");
+}
+
+void logging::AccessibleInfo(const char* aDescr, Accessible* aAccessible) {
+  printf("    %s: %p; ", aDescr, static_cast<void*>(aAccessible));
+  if (!aAccessible) {
+    printf("\n");
+    return;
+  }
+  if (aAccessible->IsDefunct()) {
+    printf("defunct\n");
+    return;
+  }
+  if (!aAccessible->Document() || aAccessible->Document()->IsDefunct()) {
+    printf("document is shutting down, no info\n");
+    return;
+  }
+
+  nsAutoString role;
+  GetAccService()->GetStringRole(aAccessible->Role(), role);
+  printf("role: %s", NS_ConvertUTF16toUTF8(role).get());
+
+  nsAutoString name;
+  aAccessible->Name(name);
+  if (!name.IsEmpty()) {
+    printf(", name: '%s'", NS_ConvertUTF16toUTF8(name).get());
+  }
+
+  printf(", idx: %d", aAccessible->IndexInParent());
+
+  nsAutoString nodeDesc;
+  DescribeNode(aAccessible->GetNode(), nodeDesc);
+  printf(", node: %s\n", NS_ConvertUTF16toUTF8(nodeDesc).get());
+}
+
+void logging::AccessibleNNode(const char* aDescr, Accessible* aAccessible) {
+  printf("    %s: %p; ", aDescr, static_cast<void*>(aAccessible));
+  if (!aAccessible) return;
+
+  nsAutoString role;
+  GetAccService()->GetStringRole(aAccessible->Role(), role);
+  nsAutoString name;
+  aAccessible->Name(name);
+
+  printf("role: %s, name: '%s';\n", NS_ConvertUTF16toUTF8(role).get(),
+         NS_ConvertUTF16toUTF8(name).get());
+
+  nsAutoCString nodeDescr(aDescr);
+  nodeDescr.AppendLiteral(" node");
+  Node(nodeDescr.get(), aAccessible->GetNode());
+
+  Document(aAccessible->Document());
+}
+
+void logging::AccessibleNNode(const char* aDescr, nsINode* aNode) {
+  DocAccessible* document =
+      GetAccService()->GetDocAccessible(aNode->OwnerDoc());
+
+  if (document) {
+    Accessible* accessible = document->GetAccessible(aNode);
+    if (accessible) {
+      AccessibleNNode(aDescr, accessible);
+      return;
+    }
+  }
+
+  nsAutoCString nodeDescr("[not accessible] ");
+  nodeDescr.Append(aDescr);
+  Node(nodeDescr.get(), aNode);
+
+  if (document) {
+    Document(document);
+    return;
+  }
+
+  printf("    [contained by not accessible document]:\n");
+  LogDocInfo(aNode->OwnerDoc(), document);
+  printf("\n");
+}
+
+void logging::DOMEvent(const char* aDescr, nsINode* aOrigTarget,
+                       const nsAString& aEventType) {
+  logging::MsgBegin("DOMEvents", "event '%s' %s",
+                    NS_ConvertUTF16toUTF8(aEventType).get(), aDescr);
+  logging::AccessibleNNode("Target", aOrigTarget);
+  logging::MsgEnd();
+}
+
+void logging::Stack() {
+  if (IsEnabled(eStack)) {
+    printf("  stack: \n");
+    nsTraceRefcnt::WalkTheStack(stdout);
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// namespace logging:: initialization
+
+bool logging::IsEnabled(uint32_t aModules) { return sModules & aModules; }
+
+bool logging::IsEnabledAll(uint32_t aModules) {
+  return (sModules & aModules) == aModules;
+}
+
+bool logging::IsEnabled(const nsAString& aModuleStr) {
+  for (unsigned int idx = 0; idx < ArrayLength(sModuleMap); idx++) {
+    if (aModuleStr.EqualsASCII(sModuleMap[idx].mStr))
+      return sModules & sModuleMap[idx].mModule;
+  }
+
+  return false;
+}
+
+void logging::Enable(const nsCString& aModules) {
+  EnableLogging(aModules.get());
+}
+
+void logging::CheckEnv() { EnableLogging(PR_GetEnv("A11YLOG")); }