Add m-esr52 at 52.6.0

11 files changed, 1065 insertions, 0 deletions

diff --git a/layout/tools/layout-debug/src/moz.build b/layout/tools/layout-debug/src/moz.build
new file mode 100644
index 000000000..be7abcab0
--- /dev/null
+++ b/layout/tools/layout-debug/src/moz.build
@@ -0,0 +1,25 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+XPIDL_SOURCES += [
+    'nsILayoutDebuggingTools.idl',
+    'nsILayoutRegressionTester.idl',
+]
+
+XPIDL_MODULE = 'layout_debug'
+
+EXPORTS += [
+    'nsLayoutDebugCIID.h',
+]
+
+UNIFIED_SOURCES += [
+    'nsDebugFactory.cpp',
+    'nsLayoutDebugCLH.cpp',
+    'nsLayoutDebuggingTools.cpp',
+    'nsRegressionTester.cpp',
+]
+
+FINAL_LIBRARY = 'xul'
diff --git a/layout/tools/layout-debug/src/nsDebugFactory.cpp b/layout/tools/layout-debug/src/nsDebugFactory.cpp
new file mode 100644
index 000000000..c9b7caca4
--- /dev/null
+++ b/layout/tools/layout-debug/src/nsDebugFactory.cpp
@@ -0,0 +1,50 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "nscore.h"
+#include "nsLayoutDebugCIID.h"
+#include "mozilla/ModuleUtils.h"
+#include "nsIFactory.h"
+#include "nsISupports.h"
+#include "nsRegressionTester.h"
+#include "nsLayoutDebuggingTools.h"
+#include "nsLayoutDebugCLH.h"
+#include "nsIServiceManager.h"
+
+NS_GENERIC_FACTORY_CONSTRUCTOR(nsRegressionTester)
+NS_GENERIC_FACTORY_CONSTRUCTOR(nsLayoutDebuggingTools)
+NS_GENERIC_FACTORY_CONSTRUCTOR(nsLayoutDebugCLH)
+
+NS_DEFINE_NAMED_CID(NS_REGRESSION_TESTER_CID);
+NS_DEFINE_NAMED_CID(NS_LAYOUT_DEBUGGINGTOOLS_CID);
+NS_DEFINE_NAMED_CID(NS_LAYOUTDEBUGCLH_CID);
+
+static const mozilla::Module::CIDEntry kLayoutDebugCIDs[] = {
+  { &kNS_REGRESSION_TESTER_CID, false, nullptr, nsRegressionTesterConstructor },
+  { &kNS_LAYOUT_DEBUGGINGTOOLS_CID, false, nullptr, nsLayoutDebuggingToolsConstructor },
+  { &kNS_LAYOUTDEBUGCLH_CID, false, nullptr, nsLayoutDebugCLHConstructor },
+  { nullptr }
+};
+
+static const mozilla::Module::ContractIDEntry kLayoutDebugContracts[] = {
+  { "@mozilla.org/layout-debug/regressiontester;1", &kNS_REGRESSION_TESTER_CID },
+  { NS_LAYOUT_DEBUGGINGTOOLS_CONTRACTID, &kNS_LAYOUT_DEBUGGINGTOOLS_CID },
+  { "@mozilla.org/commandlinehandler/general-startup;1?type=layoutdebug", &kNS_LAYOUTDEBUGCLH_CID },
+  { nullptr }
+};
+
+static const mozilla::Module::CategoryEntry kLayoutDebugCategories[] = {
+  { "command-line-handler", "m-layoutdebug", "@mozilla.org/commandlinehandler/general-startup;1?type=layoutdebug" },
+  { nullptr }
+};
+
+static const mozilla::Module kLayoutDebugModule = {
+  mozilla::Module::kVersion,
+  kLayoutDebugCIDs,
+  kLayoutDebugContracts,
+  kLayoutDebugCategories
+};
+
+NSMODULE_DEFN(nsLayoutDebugModule) = &kLayoutDebugModule;
diff --git a/layout/tools/layout-debug/src/nsILayoutDebuggingTools.idl b/layout/tools/layout-debug/src/nsILayoutDebuggingTools.idl
new file mode 100644
index 000000000..18c535e53
--- /dev/null
+++ b/layout/tools/layout-debug/src/nsILayoutDebuggingTools.idl
@@ -0,0 +1,52 @@
+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+// vim:cindent:tabstop=4:expandtab:shiftwidth=4:
+/* 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 "nsISupports.idl"
+
+interface mozIDOMWindow;
+
+/**
+ * A series of hooks into non-IDL-ized layout code to allow all the
+ * layout debugging functions to be used from chrome.
+ */
+
+[scriptable, uuid(f336d8d3-9721-4ad3-85d0-a7018c0a3383)]
+interface nsILayoutDebuggingTools : nsISupports
+{
+
+    /*
+     * Initialize debugger object to act on a docshell.
+     */
+    void init(in mozIDOMWindow win);
+
+    /*
+     * Notify the debugger that the docshell has been told to load a new
+     * URI.
+     */
+    void newURILoaded();
+
+    /* Toggle various debugging states */
+    attribute boolean visualDebugging;
+    attribute boolean visualEventDebugging;
+    attribute boolean paintFlashing;
+    attribute boolean paintDumping;
+    attribute boolean invalidateDumping;
+    attribute boolean eventDumping;
+    attribute boolean motionEventDumping;
+    attribute boolean crossingEventDumping;
+    attribute boolean reflowCounts;
+
+    /* Run various tests. */
+    void dumpWebShells();
+    void dumpContent();
+    void dumpFrames();
+    void dumpViews();
+
+    void dumpStyleSheets();
+    void dumpStyleContexts();
+
+    void dumpReflowStats();
+};
diff --git a/layout/tools/layout-debug/src/nsILayoutRegressionTester.idl b/layout/tools/layout-debug/src/nsILayoutRegressionTester.idl
new file mode 100644
index 000000000..2899a4b77
--- /dev/null
+++ b/layout/tools/layout-debug/src/nsILayoutRegressionTester.idl
@@ -0,0 +1,46 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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 "nsISupports.idl"
+
+interface mozIDOMWindow;
+interface nsIFile;
+
+[scriptable, uuid(0a065e41-3a55-4b5c-bb41-1e848bb2d10c)]
+interface nsILayoutRegressionTester : nsISupports
+{
+  /**
+   * Dumps the content of a window
+   * @param aWindowToDump       the window to dump (may be an iframe etc)
+   * @param aFile               the file to dump to. It will be created if necessary, otherwise
+                                truncated. If nil, write to stdout.
+   * @param aFlagsMask          some flags that determine what to dump
+   * @param aFlagsMask          some flags that determine what to dump
+   * @param aResult             a status value indicating whether the dump happened, 
+                                whether the page was still loading, or whether some other error happened.
+   */
+  const short DUMP_FLAGS_MASK_DEFAULT        = 0;
+  const short DUMP_FLAGS_MASK_PRINT_MODE     = 1;
+  
+  const long DUMP_RESULT_COMPLETED           = 0;   // loaded OK
+  const long DUMP_RESULT_LOADING             = 1;   // still loading
+  const long DUMP_RESULT_ERROR               = 2;   // an error occurred
+  
+  long dumpFrameModel(in mozIDOMWindow aWindowToDump,
+                      in nsIFile aFile,
+                      in unsigned long aFlagsMask);
+
+  /**
+   * Compares the contents of frame model files
+   * @param aBaseFile           the baseline file, opened with read permissions
+   * @param aVerFile            file containing the results to verify, opened with read permissions
+   * @param aFlags              flags specifying output verbosity
+   * @param aResult             result of the comparison: zero if the files are same, non-zero if different
+   */
+  const short COMPARE_FLAGS_VERBOSE        = 0;
+  const short COMPARE_FLAGS_BRIEF          = 1;
+  boolean compareFrameModels(in nsIFile aBaseFile, in nsIFile aVerFile, in unsigned long aFlags);
+};
+
diff --git a/layout/tools/layout-debug/src/nsLayoutDebugCIID.h b/layout/tools/layout-debug/src/nsLayoutDebugCIID.h
new file mode 100644
index 000000000..ceff68355
--- /dev/null
+++ b/layout/tools/layout-debug/src/nsLayoutDebugCIID.h
@@ -0,0 +1,24 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#ifndef nsFrameDebugCIID_h__
+#define nsFrameDebugCIID_h__
+
+#include "nsISupports.h"
+#include "nsIFactory.h"
+#include "nsIComponentManager.h"
+
+#define NS_REGRESSION_TESTER_CID \
+{ 0x698c54f4, 0x4ea9, 0x11d7, \
+{ 0x85, 0x9f, 0x00, 0x03, 0x93, 0x63, 0x65, 0x92 } }
+
+#define NS_LAYOUT_DEBUGGINGTOOLS_CONTRACTID \
+  "@mozilla.org/layout-debug/layout-debuggingtools;1"
+// 3f4c3b63-e640-4712-abbf-fff1301ceb60
+#define NS_LAYOUT_DEBUGGINGTOOLS_CID { 0x3f4c3b68, 0xe640, 0x4712, \
+    { 0xab, 0xbf, 0xff, 0xf1, 0x30, 0x1c, 0xeb, 0x60}}
+
+#endif // nsFrameDebugCIID_h__
+
diff --git a/layout/tools/layout-debug/src/nsLayoutDebugCLH.cpp b/layout/tools/layout-debug/src/nsLayoutDebugCLH.cpp
new file mode 100644
index 000000000..52a0d4555
--- /dev/null
+++ b/layout/tools/layout-debug/src/nsLayoutDebugCLH.cpp
@@ -0,0 +1,82 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+// vim:cindent:tabstop=4:expandtab:shiftwidth=4:
+/* 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 "nsLayoutDebugCLH.h"
+#include "nsArray.h"
+#include "nsString.h"
+#include "plstr.h"
+#include "nsCOMPtr.h"
+#include "nsIWindowWatcher.h"
+#include "nsIServiceManager.h"
+#include "nsIDOMWindow.h"
+#include "nsISupportsPrimitives.h"
+#include "nsICommandLine.h"
+
+nsLayoutDebugCLH::nsLayoutDebugCLH()
+{
+}
+
+nsLayoutDebugCLH::~nsLayoutDebugCLH()
+{
+}
+
+NS_IMPL_ISUPPORTS(nsLayoutDebugCLH, ICOMMANDLINEHANDLER)
+
+NS_IMETHODIMP
+nsLayoutDebugCLH::Handle(nsICommandLine* aCmdLine)
+{
+    nsresult rv;
+
+    int32_t idx;
+    rv = aCmdLine->FindFlag(NS_LITERAL_STRING("layoutdebug"), false, &idx);
+    NS_ENSURE_SUCCESS(rv, rv);
+    if (idx < 0)
+      return NS_OK;
+
+    int32_t length;
+    aCmdLine->GetLength(&length);
+
+    nsAutoString url;
+    if (idx + 1 < length) {
+        rv = aCmdLine->GetArgument(idx + 1, url);
+        NS_ENSURE_SUCCESS(rv, rv);
+        if (!url.IsEmpty() && url.CharAt(0) == '-')
+            url.Truncate();
+    }
+
+    aCmdLine->RemoveArguments(idx, idx + !url.IsEmpty());
+
+    nsCOMPtr<nsIMutableArray> argsArray = nsArray::Create();
+
+    if (!url.IsEmpty())
+    {
+        nsCOMPtr<nsISupportsString> scriptableURL =
+            do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID);
+        NS_ENSURE_TRUE(scriptableURL, NS_ERROR_FAILURE);
+  
+        scriptableURL->SetData(url);
+        argsArray->AppendElement(scriptableURL, /*weak =*/ false);
+    }
+
+    nsCOMPtr<nsIWindowWatcher> wwatch =
+        do_GetService(NS_WINDOWWATCHER_CONTRACTID);
+    NS_ENSURE_TRUE(wwatch, NS_ERROR_FAILURE);
+
+    nsCOMPtr<mozIDOMWindowProxy> opened;
+    wwatch->OpenWindow(nullptr, "chrome://layoutdebug/content/",
+                       "_blank", "chrome,dialog=no,all", argsArray,
+                       getter_AddRefs(opened));
+    aCmdLine->SetPreventDefault(true);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebugCLH::GetHelpInfo(nsACString& aResult)
+{
+    aResult.AssignLiteral("  -layoutdebug [<url>] Start with Layout Debugger\n");
+    return NS_OK;
+}
+
diff --git a/layout/tools/layout-debug/src/nsLayoutDebugCLH.h b/layout/tools/layout-debug/src/nsLayoutDebugCLH.h
new file mode 100644
index 000000000..c79c8d697
--- /dev/null
+++ b/layout/tools/layout-debug/src/nsLayoutDebugCLH.h
@@ -0,0 +1,29 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+// vim:cindent:tabstop=4:expandtab:shiftwidth=4:
+/* 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/. */
+
+#ifndef nsLayoutDebugCLH_h_
+#define nsLayoutDebugCLH_h_
+
+#include "nsICommandLineHandler.h"
+#define ICOMMANDLINEHANDLER nsICommandLineHandler
+
+#define NS_LAYOUTDEBUGCLH_CID \
+ { 0xa8f52633, 0x5ecf, 0x424a, \
+   { 0xa1, 0x47, 0x47, 0xc3, 0x22, 0xf7, 0xbc, 0xe2 }}
+
+class nsLayoutDebugCLH : public ICOMMANDLINEHANDLER
+{
+public:
+    nsLayoutDebugCLH();
+
+    NS_DECL_ISUPPORTS
+    NS_DECL_NSICOMMANDLINEHANDLER
+
+protected:
+    virtual ~nsLayoutDebugCLH();
+};
+
+#endif /* !defined(nsLayoutDebugCLH_h_) */
diff --git a/layout/tools/layout-debug/src/nsLayoutDebuggingTools.cpp b/layout/tools/layout-debug/src/nsLayoutDebuggingTools.cpp
new file mode 100644
index 000000000..4eb57ed9c
--- /dev/null
+++ b/layout/tools/layout-debug/src/nsLayoutDebuggingTools.cpp
@@ -0,0 +1,543 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+// vim:cindent:tabstop=4:expandtab:shiftwidth=4:
+/* 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 "nsLayoutDebuggingTools.h"
+
+#include "nsIDocShell.h"
+#include "nsPIDOMWindow.h"
+#include "nsIContentViewer.h"
+
+#include "nsIServiceManager.h"
+#include "nsIAtom.h"
+#include "nsQuickSort.h"
+
+#include "nsIContent.h"
+#include "nsIDocument.h"
+#include "nsIDOMDocument.h"
+
+#include "nsIPresShell.h"
+#include "nsViewManager.h"
+#include "nsIFrame.h"
+
+#include "nsILayoutDebugger.h"
+#include "nsLayoutCID.h"
+static NS_DEFINE_CID(kLayoutDebuggerCID, NS_LAYOUT_DEBUGGER_CID);
+
+#include "nsISelectionController.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/Preferences.h"
+
+using namespace mozilla;
+
+static already_AddRefed<nsIContentViewer>
+doc_viewer(nsIDocShell *aDocShell)
+{
+    if (!aDocShell)
+        return nullptr;
+    nsCOMPtr<nsIContentViewer> result;
+    aDocShell->GetContentViewer(getter_AddRefs(result));
+    return result.forget();
+}
+
+static already_AddRefed<nsIPresShell>
+pres_shell(nsIDocShell *aDocShell)
+{
+    nsCOMPtr<nsIContentViewer> cv = doc_viewer(aDocShell);
+    if (!cv)
+        return nullptr;
+    nsCOMPtr<nsIPresShell> result;
+    cv->GetPresShell(getter_AddRefs(result));
+    return result.forget();
+}
+
+static nsViewManager*
+view_manager(nsIDocShell *aDocShell)
+{
+    nsCOMPtr<nsIPresShell> shell(pres_shell(aDocShell));
+    if (!shell)
+        return nullptr;
+    return shell->GetViewManager();
+}
+
+#ifdef DEBUG
+static already_AddRefed<nsIDocument>
+document(nsIDocShell *aDocShell)
+{
+    nsCOMPtr<nsIContentViewer> cv(doc_viewer(aDocShell));
+    if (!cv)
+        return nullptr;
+    nsCOMPtr<nsIDOMDocument> domDoc;
+    cv->GetDOMDocument(getter_AddRefs(domDoc));
+    if (!domDoc)
+        return nullptr;
+    nsCOMPtr<nsIDocument> result = do_QueryInterface(domDoc);
+    return result.forget();
+}
+#endif
+
+nsLayoutDebuggingTools::nsLayoutDebuggingTools()
+  : mPaintFlashing(false),
+    mPaintDumping(false),
+    mInvalidateDumping(false),
+    mEventDumping(false),
+    mMotionEventDumping(false),
+    mCrossingEventDumping(false),
+    mReflowCounts(false)
+{
+    NewURILoaded();
+}
+
+nsLayoutDebuggingTools::~nsLayoutDebuggingTools()
+{
+}
+
+NS_IMPL_ISUPPORTS(nsLayoutDebuggingTools, nsILayoutDebuggingTools)
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::Init(mozIDOMWindow* aWin)
+{
+    if (!Preferences::GetService()) {
+        return NS_ERROR_UNEXPECTED;
+    }
+
+    {
+        if (!aWin)
+            return NS_ERROR_UNEXPECTED;
+        auto* window = nsPIDOMWindowInner::From(aWin);
+        mDocShell = window->GetDocShell();
+    }
+    NS_ENSURE_TRUE(mDocShell, NS_ERROR_UNEXPECTED);
+
+    mPaintFlashing =
+        Preferences::GetBool("nglayout.debug.paint_flashing", mPaintFlashing);
+    mPaintDumping =
+        Preferences::GetBool("nglayout.debug.paint_dumping", mPaintDumping);
+    mInvalidateDumping =
+        Preferences::GetBool("nglayout.debug.invalidate_dumping", mInvalidateDumping);
+    mEventDumping =
+        Preferences::GetBool("nglayout.debug.event_dumping", mEventDumping);
+    mMotionEventDumping =
+        Preferences::GetBool("nglayout.debug.motion_event_dumping",
+                             mMotionEventDumping);
+    mCrossingEventDumping =
+        Preferences::GetBool("nglayout.debug.crossing_event_dumping",
+                             mCrossingEventDumping);
+    mReflowCounts =
+        Preferences::GetBool("layout.reflow.showframecounts", mReflowCounts);
+
+    {
+        nsCOMPtr<nsILayoutDebugger> ld = do_GetService(kLayoutDebuggerCID);
+        if (ld) {
+            ld->GetShowFrameBorders(&mVisualDebugging);
+            ld->GetShowEventTargetFrameBorder(&mVisualEventDebugging);
+        }
+    }
+
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::NewURILoaded()
+{
+    NS_ENSURE_TRUE(mDocShell, NS_ERROR_NOT_INITIALIZED);
+    // Reset all the state that should be reset between pages.
+
+    // XXX Some of these should instead be transferred between pages!
+    mEditorMode = false;
+    mVisualDebugging = false;
+    mVisualEventDebugging = false;
+
+    mReflowCounts = false;
+
+    ForceRefresh();
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::GetVisualDebugging(bool *aVisualDebugging)
+{
+    *aVisualDebugging = mVisualDebugging;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::SetVisualDebugging(bool aVisualDebugging)
+{
+    nsCOMPtr<nsILayoutDebugger> ld = do_GetService(kLayoutDebuggerCID);
+    if (!ld)
+        return NS_ERROR_UNEXPECTED;
+    mVisualDebugging = aVisualDebugging;
+    ld->SetShowFrameBorders(aVisualDebugging);
+    ForceRefresh();
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::GetVisualEventDebugging(bool *aVisualEventDebugging)
+{
+    *aVisualEventDebugging = mVisualEventDebugging;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::SetVisualEventDebugging(bool aVisualEventDebugging)
+{
+    nsCOMPtr<nsILayoutDebugger> ld = do_GetService(kLayoutDebuggerCID);
+    if (!ld)
+        return NS_ERROR_UNEXPECTED;
+    mVisualEventDebugging = aVisualEventDebugging;
+    ld->SetShowEventTargetFrameBorder(aVisualEventDebugging);
+    ForceRefresh();
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::GetPaintFlashing(bool *aPaintFlashing)
+{
+    *aPaintFlashing = mPaintFlashing;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::SetPaintFlashing(bool aPaintFlashing)
+{
+    mPaintFlashing = aPaintFlashing;
+    return SetBoolPrefAndRefresh("nglayout.debug.paint_flashing", mPaintFlashing);
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::GetPaintDumping(bool *aPaintDumping)
+{
+    *aPaintDumping = mPaintDumping;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::SetPaintDumping(bool aPaintDumping)
+{
+    mPaintDumping = aPaintDumping;
+    return SetBoolPrefAndRefresh("nglayout.debug.paint_dumping", mPaintDumping);
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::GetInvalidateDumping(bool *aInvalidateDumping)
+{
+    *aInvalidateDumping = mInvalidateDumping;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::SetInvalidateDumping(bool aInvalidateDumping)
+{
+    mInvalidateDumping = aInvalidateDumping;
+    return SetBoolPrefAndRefresh("nglayout.debug.invalidate_dumping", mInvalidateDumping);
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::GetEventDumping(bool *aEventDumping)
+{
+    *aEventDumping = mEventDumping;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::SetEventDumping(bool aEventDumping)
+{
+    mEventDumping = aEventDumping;
+    return SetBoolPrefAndRefresh("nglayout.debug.event_dumping", mEventDumping);
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::GetMotionEventDumping(bool *aMotionEventDumping)
+{
+    *aMotionEventDumping = mMotionEventDumping;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::SetMotionEventDumping(bool aMotionEventDumping)
+{
+    mMotionEventDumping = aMotionEventDumping;
+    return SetBoolPrefAndRefresh("nglayout.debug.motion_event_dumping", mMotionEventDumping);
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::GetCrossingEventDumping(bool *aCrossingEventDumping)
+{
+    *aCrossingEventDumping = mCrossingEventDumping;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::SetCrossingEventDumping(bool aCrossingEventDumping)
+{
+    mCrossingEventDumping = aCrossingEventDumping;
+    return SetBoolPrefAndRefresh("nglayout.debug.crossing_event_dumping", mCrossingEventDumping);
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::GetReflowCounts(bool* aShow)
+{
+    *aShow = mReflowCounts;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::SetReflowCounts(bool aShow)
+{
+    NS_ENSURE_TRUE(mDocShell, NS_ERROR_NOT_INITIALIZED);
+    nsCOMPtr<nsIPresShell> shell(pres_shell(mDocShell)); 
+    if (shell) {
+#ifdef MOZ_REFLOW_PERF
+        shell->SetPaintFrameCount(aShow);
+        SetBoolPrefAndRefresh("layout.reflow.showframecounts", aShow);
+        mReflowCounts = aShow;
+#else
+        printf("************************************************\n");
+        printf("Sorry, you have not built with MOZ_REFLOW_PERF=1\n");
+        printf("************************************************\n");
+#endif
+    }
+    return NS_OK;
+}
+
+static void DumpAWebShell(nsIDocShellTreeItem* aShellItem, FILE* out, int32_t aIndent)
+{
+    nsString name;
+    nsCOMPtr<nsIDocShellTreeItem> parent;
+    int32_t i, n;
+
+    for (i = aIndent; --i >= 0; )
+        fprintf(out, "  ");
+
+    fprintf(out, "%p '", static_cast<void*>(aShellItem));
+    aShellItem->GetName(name);
+    aShellItem->GetSameTypeParent(getter_AddRefs(parent));
+    fputs(NS_LossyConvertUTF16toASCII(name).get(), out);
+    fprintf(out, "' parent=%p <\n", static_cast<void*>(parent));
+
+    ++aIndent;
+    aShellItem->GetChildCount(&n);
+    for (i = 0; i < n; ++i) {
+        nsCOMPtr<nsIDocShellTreeItem> child;
+        aShellItem->GetChildAt(i, getter_AddRefs(child));
+        if (child) {
+            DumpAWebShell(child, out, aIndent);
+        }
+    }
+    --aIndent;
+    for (i = aIndent; --i >= 0; )
+        fprintf(out, "  ");
+    fputs(">\n", out);
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::DumpWebShells()
+{
+    NS_ENSURE_TRUE(mDocShell, NS_ERROR_NOT_INITIALIZED);
+    DumpAWebShell(mDocShell, stdout, 0);
+    return NS_OK;
+}
+
+static
+void
+DumpContentRecur(nsIDocShell* aDocShell, FILE* out)
+{
+#ifdef DEBUG
+    if (nullptr != aDocShell) {
+        fprintf(out, "docshell=%p \n", static_cast<void*>(aDocShell));
+        nsCOMPtr<nsIDocument> doc(document(aDocShell));
+        if (doc) {
+            dom::Element *root = doc->GetRootElement();
+            if (root) {
+                root->List(out);
+            }
+        }
+        else {
+            fputs("no document\n", out);
+        }
+        // dump the frames of the sub documents
+        int32_t i, n;
+        aDocShell->GetChildCount(&n);
+        for (i = 0; i < n; ++i) {
+            nsCOMPtr<nsIDocShellTreeItem> child;
+            aDocShell->GetChildAt(i, getter_AddRefs(child));
+            nsCOMPtr<nsIDocShell> childAsShell(do_QueryInterface(child));
+            if (child) {
+                DumpContentRecur(childAsShell, out);
+            }
+        }
+    }
+#endif
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::DumpContent()
+{
+    NS_ENSURE_TRUE(mDocShell, NS_ERROR_NOT_INITIALIZED);
+    DumpContentRecur(mDocShell, stdout);
+    return NS_OK;
+}
+
+static void
+DumpFramesRecur(nsIDocShell* aDocShell, FILE* out)
+{
+#ifdef DEBUG
+    fprintf(out, "webshell=%p \n", static_cast<void*>(aDocShell));
+    nsCOMPtr<nsIPresShell> shell(pres_shell(aDocShell));
+    if (shell) {
+        nsIFrame* root = shell->GetRootFrame();
+        if (root) {
+            root->List(out);
+        }
+    }
+    else {
+        fputs("null pres shell\n", out);
+    }
+
+    // dump the frames of the sub documents
+    int32_t i, n;
+    aDocShell->GetChildCount(&n);
+    for (i = 0; i < n; ++i) {
+        nsCOMPtr<nsIDocShellTreeItem> child;
+        aDocShell->GetChildAt(i, getter_AddRefs(child));
+        nsCOMPtr<nsIDocShell> childAsShell(do_QueryInterface(child));
+        if (childAsShell) {
+            DumpFramesRecur(childAsShell, out);
+        }
+    }
+#endif
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::DumpFrames()
+{
+    NS_ENSURE_TRUE(mDocShell, NS_ERROR_NOT_INITIALIZED);
+    DumpFramesRecur(mDocShell, stdout);
+    return NS_OK;
+}
+
+static
+void
+DumpViewsRecur(nsIDocShell* aDocShell, FILE* out)
+{
+#ifdef DEBUG
+    fprintf(out, "docshell=%p \n", static_cast<void*>(aDocShell));
+    RefPtr<nsViewManager> vm(view_manager(aDocShell));
+    if (vm) {
+        nsView* root = vm->GetRootView();
+        if (root) {
+            root->List(out);
+        }
+    }
+    else {
+        fputs("null view manager\n", out);
+    }
+
+    // dump the views of the sub documents
+    int32_t i, n;
+    aDocShell->GetChildCount(&n);
+    for (i = 0; i < n; i++) {
+        nsCOMPtr<nsIDocShellTreeItem> child;
+        aDocShell->GetChildAt(i, getter_AddRefs(child));
+        nsCOMPtr<nsIDocShell> childAsShell(do_QueryInterface(child));
+        if (childAsShell) {
+            DumpViewsRecur(childAsShell, out);
+        }
+    }
+#endif // DEBUG
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::DumpViews()
+{
+    NS_ENSURE_TRUE(mDocShell, NS_ERROR_NOT_INITIALIZED);
+    DumpViewsRecur(mDocShell, stdout);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::DumpStyleSheets()
+{
+    NS_ENSURE_TRUE(mDocShell, NS_ERROR_NOT_INITIALIZED);
+#ifdef DEBUG
+    FILE *out = stdout;
+    nsCOMPtr<nsIPresShell> shell(pres_shell(mDocShell)); 
+    if (shell)
+        shell->ListStyleSheets(out);
+    else
+        fputs("null pres shell\n", out);
+#endif
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::DumpStyleContexts()
+{
+    NS_ENSURE_TRUE(mDocShell, NS_ERROR_NOT_INITIALIZED);
+#ifdef DEBUG
+    FILE *out = stdout;
+    nsCOMPtr<nsIPresShell> shell(pres_shell(mDocShell)); 
+    if (shell) {
+        nsIFrame* root = shell->GetRootFrame();
+        if (!root) {
+            fputs("null root frame\n", out);
+        } else {
+            shell->ListStyleContexts(root, out);
+        }
+    } else {
+        fputs("null pres shell\n", out);
+    }
+#endif
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLayoutDebuggingTools::DumpReflowStats()
+{
+    NS_ENSURE_TRUE(mDocShell, NS_ERROR_NOT_INITIALIZED);
+#ifdef DEBUG
+    nsCOMPtr<nsIPresShell> shell(pres_shell(mDocShell)); 
+    if (shell) {
+#ifdef MOZ_REFLOW_PERF
+        shell->DumpReflows();
+#else
+        printf("************************************************\n");
+        printf("Sorry, you have not built with MOZ_REFLOW_PERF=1\n");
+        printf("************************************************\n");
+#endif
+    }
+#endif
+    return NS_OK;
+}
+
+void nsLayoutDebuggingTools::ForceRefresh()
+{
+    RefPtr<nsViewManager> vm(view_manager(mDocShell));
+    if (!vm)
+        return;
+    nsView* root = vm->GetRootView();
+    if (root) {
+        vm->InvalidateView(root);
+    }
+}
+
+nsresult
+nsLayoutDebuggingTools::SetBoolPrefAndRefresh(const char * aPrefName,
+                                              bool aNewVal)
+{
+    NS_ENSURE_TRUE(mDocShell, NS_ERROR_NOT_INITIALIZED);
+
+    nsIPrefService* prefService = Preferences::GetService();
+    NS_ENSURE_TRUE(prefService && aPrefName, NS_OK);
+
+    Preferences::SetBool(aPrefName, aNewVal);
+    prefService->SavePrefFile(nullptr);
+
+    ForceRefresh();
+
+    return NS_OK;
+}
diff --git a/layout/tools/layout-debug/src/nsLayoutDebuggingTools.h b/layout/tools/layout-debug/src/nsLayoutDebuggingTools.h
new file mode 100644
index 000000000..6d57c1fa1
--- /dev/null
+++ b/layout/tools/layout-debug/src/nsLayoutDebuggingTools.h
@@ -0,0 +1,44 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+// vim:cindent:tabstop=4:expandtab:shiftwidth=4:
+/* 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/. */
+
+#ifndef nsLayoutDebuggingTools_h
+#define nsLayoutDebuggingTools_h
+
+#include "nsILayoutDebuggingTools.h"
+#include "nsIDocShell.h"
+#include "nsCOMPtr.h"
+
+class nsLayoutDebuggingTools : public nsILayoutDebuggingTools {
+
+public:
+    nsLayoutDebuggingTools();
+
+    NS_DECL_ISUPPORTS
+
+    NS_DECL_NSILAYOUTDEBUGGINGTOOLS
+
+protected:
+    virtual ~nsLayoutDebuggingTools();
+
+    void ForceRefresh();
+    nsresult GetBoolPref(const char * aPrefName, bool *aValue);
+    nsresult SetBoolPrefAndRefresh(const char * aPrefName, bool aNewValue);
+
+    nsCOMPtr<nsIDocShell> mDocShell;
+
+    bool mEditorMode;
+    bool mVisualDebugging;
+    bool mVisualEventDebugging;
+    bool mPaintFlashing;
+    bool mPaintDumping;
+    bool mInvalidateDumping;
+    bool mEventDumping;
+    bool mMotionEventDumping;
+    bool mCrossingEventDumping;
+    bool mReflowCounts;
+};
+
+#endif
diff --git a/layout/tools/layout-debug/src/nsRegressionTester.cpp b/layout/tools/layout-debug/src/nsRegressionTester.cpp
new file mode 100644
index 000000000..3ac7bddca
--- /dev/null
+++ b/layout/tools/layout-debug/src/nsRegressionTester.cpp
@@ -0,0 +1,138 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "nsISupports.h"
+#include "nsRegressionTester.h"
+
+#include "nsXPIDLString.h"
+#include "nsReadableUtils.h"
+#include "nsIWindowWatcher.h"
+#include "nsPIDOMWindow.h"
+#include "nsIPresShell.h"
+#include "nsIURI.h"
+#include "nsISimpleEnumerator.h"
+#include "nsIDocShell.h"
+#include "nsIContentViewer.h"
+#include "nsIContentViewerFile.h"
+#include "nsIFrame.h"
+#include "nsStyleStruct.h"
+#include "nsIFrameUtil.h"
+#include "nsLayoutCID.h"
+#include "nsIFile.h"
+#include "nsViewManager.h"
+#include "nsView.h"
+
+
+
+static NS_DEFINE_CID(kFrameUtilCID, NS_FRAME_UTIL_CID);
+
+
+nsRegressionTester::nsRegressionTester()
+{
+}
+
+nsRegressionTester::~nsRegressionTester() 
+{
+}
+
+NS_IMPL_ISUPPORTS(nsRegressionTester, nsILayoutRegressionTester)
+
+NS_IMETHODIMP
+nsRegressionTester::DumpFrameModel(mozIDOMWindow* aWindowToDump,
+                                   nsIFile *aDestFile,
+                                   uint32_t aFlagsMask, int32_t *aResult)
+{
+  NS_ENSURE_ARG(aWindowToDump);
+  NS_ENSURE_ARG_POINTER(aResult);
+
+  *aResult = DUMP_RESULT_ERROR;
+
+#ifndef DEBUG
+  return NS_ERROR_NOT_AVAILABLE;
+#else
+  nsresult    rv = NS_ERROR_NOT_AVAILABLE;
+  uint32_t    busyFlags;
+  bool        stillLoading;
+
+  auto* windowToDump = nsPIDOMWindowInner::From(aWindowToDump);
+
+  nsCOMPtr<nsIDocShell> docShell = windowToDump->GetDocShell();
+
+  // find out if the document is loaded
+  docShell->GetBusyFlags(&busyFlags);
+  stillLoading = busyFlags & (nsIDocShell::BUSY_FLAGS_BUSY |
+                              nsIDocShell::BUSY_FLAGS_PAGE_LOADING);
+  if (stillLoading)
+  {
+    *aResult = DUMP_RESULT_LOADING;
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsIPresShell> presShell = docShell->GetPresShell();
+
+  nsIFrame* root = presShell->GetRootFrame();
+
+  FILE* fp = stdout;
+  if (aDestFile)
+  {
+    rv = aDestFile->OpenANSIFileDesc("w", &fp);
+    if (NS_FAILED(rv)) return rv;
+  }
+  if (aFlagsMask & DUMP_FLAGS_MASK_PRINT_MODE) {
+    nsCOMPtr <nsIContentViewer> viewer;
+    docShell->GetContentViewer(getter_AddRefs(viewer));
+    if (viewer){
+      nsCOMPtr<nsIContentViewerFile> viewerFile = do_QueryInterface(viewer);
+      if (viewerFile) {
+         viewerFile->Print(true, fp, nullptr);
+      }
+    }
+  }
+  else {
+    root->DumpRegressionData(presShell->GetPresContext(), fp, 0);
+  }
+  if (fp != stdout)
+    fclose(fp);
+  *aResult = DUMP_RESULT_COMPLETED;
+  return NS_OK;
+#endif
+}
+
+NS_IMETHODIMP
+nsRegressionTester::CompareFrameModels(nsIFile *aBaseFile, nsIFile *aVerFile,
+                                       uint32_t aFlags, bool *aResult)
+{
+  NS_ENSURE_ARG(aBaseFile);
+  NS_ENSURE_ARG(aVerFile);
+  NS_ENSURE_ARG_POINTER(aResult);
+  
+  *aResult = false;
+  
+  nsresult rv;
+  FILE* baseFile;
+  rv = aBaseFile->OpenANSIFileDesc("r", &baseFile);
+  if (NS_FAILED(rv)) return rv;
+
+  FILE* verFile;
+  rv = aVerFile->OpenANSIFileDesc("r", &verFile);
+  if (NS_FAILED(rv)) {
+    fclose(baseFile);
+    return rv;
+  }
+
+  nsCOMPtr<nsIFrameUtil> frameUtil = do_CreateInstance(kFrameUtilCID, &rv);
+  if (NS_SUCCEEDED(rv))
+  {
+    int32_t outputLevel = (aFlags == COMPARE_FLAGS_VERBOSE) ? 0 : 1;
+    rv = frameUtil->CompareRegressionData(baseFile, verFile, outputLevel);
+    // CompareRegressionData closes |baseFile| and |verFile|.
+  } else {
+    fclose(verFile);          
+    fclose(baseFile);
+  }
+
+  *aResult = NS_FAILED(rv);
+  return NS_OK;
+}
diff --git a/layout/tools/layout-debug/src/nsRegressionTester.h b/layout/tools/layout-debug/src/nsRegressionTester.h
new file mode 100644
index 000000000..b0f36f9b5
--- /dev/null
+++ b/layout/tools/layout-debug/src/nsRegressionTester.h
@@ -0,0 +1,32 @@
+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * 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/. */
+
+#ifndef nsRegressionTester_h__
+#define nsRegressionTester_h__
+
+#include "nsCOMPtr.h"
+
+#include "nsILayoutRegressionTester.h"  
+#include "nsILayoutDebugger.h"
+
+//*****************************************************************************
+//***    nsRegressionTester
+//*****************************************************************************
+class  nsRegressionTester : public nsILayoutRegressionTester
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSILAYOUTREGRESSIONTESTER
+
+  nsRegressionTester();
+
+protected:
+  virtual ~nsRegressionTester();
+};
+
+
+
+#endif /* nsRegressionTester_h__ */