From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 layout/forms/nsTextControlFrame.cpp | 1325 +++++++++++++++++++++++++++++++++++
 1 file changed, 1325 insertions(+)
 create mode 100644 layout/forms/nsTextControlFrame.cpp

(limited to 'layout/forms/nsTextControlFrame.cpp')

diff --git a/layout/forms/nsTextControlFrame.cpp b/layout/forms/nsTextControlFrame.cpp
new file mode 100644
index 0000000000..c51b94c56a
--- /dev/null
+++ b/layout/forms/nsTextControlFrame.cpp
@@ -0,0 +1,1325 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=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 "mozilla/DebugOnly.h"
+
+#include "gfxContext.h"
+#include "nsCOMPtr.h"
+#include "nsFontMetrics.h"
+#include "nsTextControlFrame.h"
+#include "nsIEditor.h"
+#include "nsCaret.h"
+#include "nsCSSPseudoElements.h"
+#include "nsDisplayList.h"
+#include "nsGenericHTMLElement.h"
+#include "nsTextFragment.h"
+#include "nsNameSpaceManager.h"
+
+#include "nsIContent.h"
+#include "nsIScrollableFrame.h"
+#include "nsPresContext.h"
+#include "nsGkAtoms.h"
+#include "nsLayoutUtils.h"
+
+#include <algorithm>
+#include "nsRange.h"  //for selection setting helper func
+#include "nsINode.h"
+#include "nsPIDOMWindow.h"  //needed for notify selection changed to update the menus ect.
+#include "nsQueryObject.h"
+#include "nsILayoutHistoryState.h"
+
+#include "nsFocusManager.h"
+#include "mozilla/EventStateManager.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/PresState.h"
+#include "mozilla/TextEditor.h"
+#include "nsAttrValueInlines.h"
+#include "mozilla/dom/Selection.h"
+#include "nsContentUtils.h"
+#include "nsTextNode.h"
+#include "mozilla/dom/HTMLInputElement.h"
+#include "mozilla/dom/HTMLTextAreaElement.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/dom/Text.h"
+#include "mozilla/MathAlgorithms.h"
+#include "mozilla/StaticPrefs_layout.h"
+#include "mozilla/Try.h"
+#include "nsFrameSelection.h"
+
+#define DEFAULT_COLUMN_WIDTH 20
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsIFrame* NS_NewTextControlFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
+  return new (aPresShell)
+      nsTextControlFrame(aStyle, aPresShell->GetPresContext());
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsTextControlFrame)
+
+NS_QUERYFRAME_HEAD(nsTextControlFrame)
+  NS_QUERYFRAME_ENTRY(nsTextControlFrame)
+  NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
+  NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
+  NS_QUERYFRAME_ENTRY(nsITextControlFrame)
+  NS_QUERYFRAME_ENTRY(nsIStatefulFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
+
+#ifdef ACCESSIBILITY
+a11y::AccType nsTextControlFrame::AccessibleType() {
+  return a11y::eHTMLTextFieldType;
+}
+#endif
+
+#ifdef DEBUG
+class EditorInitializerEntryTracker {
+ public:
+  explicit EditorInitializerEntryTracker(nsTextControlFrame& frame)
+      : mFrame(frame), mFirstEntry(false) {
+    if (!mFrame.mInEditorInitialization) {
+      mFrame.mInEditorInitialization = true;
+      mFirstEntry = true;
+    }
+  }
+  ~EditorInitializerEntryTracker() {
+    if (mFirstEntry) {
+      mFrame.mInEditorInitialization = false;
+    }
+  }
+  bool EnteredMoreThanOnce() const { return !mFirstEntry; }
+
+ private:
+  nsTextControlFrame& mFrame;
+  bool mFirstEntry;
+};
+#endif
+
+class nsTextControlFrame::nsAnonDivObserver final
+    : public nsStubMutationObserver {
+ public:
+  explicit nsAnonDivObserver(nsTextControlFrame& aFrame) : mFrame(aFrame) {}
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
+
+ private:
+  ~nsAnonDivObserver() = default;
+  nsTextControlFrame& mFrame;
+};
+
+nsTextControlFrame::nsTextControlFrame(ComputedStyle* aStyle,
+                                       nsPresContext* aPresContext,
+                                       nsIFrame::ClassID aClassID)
+    : nsContainerFrame(aStyle, aPresContext, aClassID) {}
+
+nsTextControlFrame::~nsTextControlFrame() = default;
+
+nsIScrollableFrame* nsTextControlFrame::GetScrollTargetFrame() const {
+  if (!mRootNode) {
+    return nullptr;
+  }
+  return do_QueryFrame(mRootNode->GetPrimaryFrame());
+}
+
+void nsTextControlFrame::Destroy(DestroyContext& aContext) {
+  RemoveProperty(TextControlInitializer());
+
+  // Unbind the text editor state object from the frame.  The editor will live
+  // on, but things like controllers will be released.
+  RefPtr textControlElement = ControlElement();
+  if (mMutationObserver) {
+    textControlElement->UnbindFromFrame(this);
+    mRootNode->RemoveMutationObserver(mMutationObserver);
+    mMutationObserver = nullptr;
+  }
+
+  // If there is a drag session, user may be dragging selection in removing
+  // text node in the text control.  If so, we should set source node to the
+  // text control because another text node may be recreated soon if the text
+  // control is just reframed.
+  if (nsCOMPtr<nsIDragSession> dragSession = nsContentUtils::GetDragSession()) {
+    if (dragSession->IsDraggingTextInTextControl() && mRootNode &&
+        mRootNode->GetFirstChild()) {
+      nsCOMPtr<nsINode> sourceNode;
+      if (NS_SUCCEEDED(
+              dragSession->GetSourceNode(getter_AddRefs(sourceNode))) &&
+          mRootNode->Contains(sourceNode)) {
+        MOZ_ASSERT(sourceNode->IsText());
+        dragSession->UpdateSource(textControlElement, nullptr);
+      }
+    }
+  }
+  // Otherwise, EventStateManager may track gesture to start drag with native
+  // anonymous nodes in the text control element.
+  else if (textControlElement->GetPresContext(Element::eForComposedDoc)) {
+    textControlElement->GetPresContext(Element::eForComposedDoc)
+        ->EventStateManager()
+        ->TextControlRootWillBeRemoved(*textControlElement);
+  }
+
+  // If we're a subclass like nsNumberControlFrame, then it owns the root of the
+  // anonymous subtree where mRootNode is.
+  aContext.AddAnonymousContent(mRootNode.forget());
+  aContext.AddAnonymousContent(mPlaceholderDiv.forget());
+  aContext.AddAnonymousContent(mPreviewDiv.forget());
+  aContext.AddAnonymousContent(mRevealButton.forget());
+
+  nsContainerFrame::Destroy(aContext);
+}
+
+LogicalSize nsTextControlFrame::CalcIntrinsicSize(
+    gfxContext* aRenderingContext, WritingMode aWM,
+    float aFontSizeInflation) const {
+  LogicalSize intrinsicSize(aWM);
+  RefPtr<nsFontMetrics> fontMet =
+      nsLayoutUtils::GetFontMetricsForFrame(this, aFontSizeInflation);
+  const nscoord lineHeight =
+      ReflowInput::CalcLineHeight(*Style(), PresContext(), GetContent(),
+                                  NS_UNCONSTRAINEDSIZE, aFontSizeInflation);
+  // Use the larger of the font's "average" char width or the width of the
+  // zero glyph (if present) as the basis for resolving the size attribute.
+  const nscoord charWidth =
+      std::max(fontMet->ZeroOrAveCharWidth(), fontMet->AveCharWidth());
+  const nscoord charMaxAdvance = fontMet->MaxAdvance();
+
+  // Initialize based on the width in characters.
+  const int32_t cols = GetCols();
+  intrinsicSize.ISize(aWM) = cols * charWidth;
+
+  // If we do not have what appears to be a fixed-width font, add a "slop"
+  // amount based on the max advance of the font (clamped to twice charWidth,
+  // because some fonts have a few extremely-wide outliers that would result
+  // in excessive width here; e.g. the triple-emdash ligature in SFNS Text),
+  // minus 4px. This helps avoid input fields becoming unusably narrow with
+  // small size values.
+  if (charMaxAdvance - charWidth > AppUnitsPerCSSPixel()) {
+    nscoord internalPadding =
+        std::max(0, std::min(charMaxAdvance, charWidth * 2) -
+                        nsPresContext::CSSPixelsToAppUnits(4));
+    internalPadding = RoundToMultiple(internalPadding, AppUnitsPerCSSPixel());
+    intrinsicSize.ISize(aWM) += internalPadding;
+  } else {
+    // This is to account for the anonymous <br> having a 1 twip width
+    // in Full Standards mode, see BRFrame::Reflow and bug 228752.
+    if (PresContext()->CompatibilityMode() == eCompatibility_FullStandards) {
+      intrinsicSize.ISize(aWM) += 1;
+    }
+  }
+
+  // Increment width with cols * letter-spacing.
+  {
+    const StyleLength& letterSpacing = StyleText()->mLetterSpacing;
+    if (!letterSpacing.IsZero()) {
+      intrinsicSize.ISize(aWM) += cols * letterSpacing.ToAppUnits();
+    }
+  }
+
+  // Set the height equal to total number of rows (times the height of each
+  // line, of course)
+  intrinsicSize.BSize(aWM) = lineHeight * GetRows();
+
+  // Add in the size of the scrollbars for textarea
+  if (IsTextArea()) {
+    nsIScrollableFrame* scrollableFrame = GetScrollTargetFrame();
+    NS_ASSERTION(scrollableFrame, "Child must be scrollable");
+    if (scrollableFrame) {
+      LogicalMargin scrollbarSizes(aWM,
+                                   scrollableFrame->GetDesiredScrollbarSizes());
+      intrinsicSize.ISize(aWM) += scrollbarSizes.IStartEnd(aWM);
+      intrinsicSize.BSize(aWM) += scrollbarSizes.BStartEnd(aWM);
+    }
+  }
+  return intrinsicSize;
+}
+
+nsresult nsTextControlFrame::EnsureEditorInitialized() {
+  // This method initializes our editor, if needed.
+
+  // This code used to be called from CreateAnonymousContent(), but
+  // when the editor set the initial string, it would trigger a
+  // PresShell listener which called FlushPendingNotifications()
+  // during frame construction. This was causing other form controls
+  // to display wrong values.  Additionally, calling this every time
+  // a text frame control is instantiated means that we're effectively
+  // instantiating the editor for all text fields, even if they
+  // never get used.  So, now this method is being called lazily only
+  // when we actually need an editor.
+
+  if (mEditorHasBeenInitialized) return NS_OK;
+
+  Document* doc = mContent->GetComposedDoc();
+  NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
+
+  AutoWeakFrame weakFrame(this);
+
+  // Flush out content on our document.  Have to do this, because script
+  // blockers don't prevent the sink flushing out content and notifying in the
+  // process, which can destroy frames.
+  doc->FlushPendingNotifications(FlushType::ContentAndNotify);
+  NS_ENSURE_TRUE(weakFrame.IsAlive(), NS_ERROR_FAILURE);
+
+  // Make sure that editor init doesn't do things that would kill us off
+  // (especially off the script blockers it'll create for its DOM mutations).
+  {
+    RefPtr<TextControlElement> textControlElement = ControlElement();
+
+    // Hide selection changes during the initialization, as webpages should not
+    // be aware of these initializations
+    AutoHideSelectionChanges hideSelectionChanges(
+        textControlElement->GetConstFrameSelection());
+
+    nsAutoScriptBlocker scriptBlocker;
+
+    // Time to mess with our security context... See comments in GetValue()
+    // for why this is needed.
+    mozilla::dom::AutoNoJSAPI nojsapi;
+
+    // Make sure that we try to focus the content even if the method fails
+    class EnsureSetFocus {
+     public:
+      explicit EnsureSetFocus(nsTextControlFrame* aFrame) : mFrame(aFrame) {}
+      ~EnsureSetFocus() {
+        if (nsContentUtils::IsFocusedContent(mFrame->GetContent()))
+          mFrame->SetFocus(true, false);
+      }
+
+     private:
+      nsTextControlFrame* mFrame;
+    };
+    EnsureSetFocus makeSureSetFocusHappens(this);
+
+#ifdef DEBUG
+    // Make sure we are not being called again until we're finished.
+    // If reentrancy happens, just pretend that we don't have an editor.
+    const EditorInitializerEntryTracker tracker(*this);
+    NS_ASSERTION(!tracker.EnteredMoreThanOnce(),
+                 "EnsureEditorInitialized has been called while a previous "
+                 "call was in progress");
+#endif
+
+    // Create an editor for the frame, if one doesn't already exist
+    nsresult rv = textControlElement->CreateEditor();
+    NS_ENSURE_SUCCESS(rv, rv);
+    NS_ENSURE_STATE(weakFrame.IsAlive());
+
+    // Set mEditorHasBeenInitialized so that subsequent calls will use the
+    // editor.
+    mEditorHasBeenInitialized = true;
+
+    if (weakFrame.IsAlive()) {
+      uint32_t position = 0;
+
+      // Set the selection to the end of the text field (bug 1287655),
+      // but only if the contents has changed (bug 1337392).
+      if (textControlElement->ValueChanged()) {
+        nsAutoString val;
+        textControlElement->GetTextEditorValue(val);
+        position = val.Length();
+      }
+
+      SetSelectionEndPoints(position, position);
+    }
+  }
+  NS_ENSURE_STATE(weakFrame.IsAlive());
+  return NS_OK;
+}
+
+already_AddRefed<Element> nsTextControlFrame::MakeAnonElement(
+    PseudoStyleType aPseudoType, Element* aParent, nsAtom* aTag) const {
+  MOZ_ASSERT(aPseudoType != PseudoStyleType::NotPseudo);
+  Document* doc = PresContext()->Document();
+  RefPtr<Element> element = doc->CreateHTMLElement(aTag);
+  element->SetPseudoElementType(aPseudoType);
+  if (aPseudoType == PseudoStyleType::mozTextControlEditingRoot) {
+    // Make our root node editable
+    element->SetFlags(NODE_IS_EDITABLE);
+  }
+
+  if (aPseudoType == PseudoStyleType::mozNumberSpinDown ||
+      aPseudoType == PseudoStyleType::mozNumberSpinUp) {
+    element->SetAttr(kNameSpaceID_None, nsGkAtoms::aria_hidden, u"true"_ns,
+                     false);
+  }
+
+  if (aParent) {
+    aParent->AppendChildTo(element, false, IgnoreErrors());
+  }
+
+  return element.forget();
+}
+
+already_AddRefed<Element> nsTextControlFrame::MakeAnonDivWithTextNode(
+    PseudoStyleType aPseudoType) const {
+  RefPtr<Element> div = MakeAnonElement(aPseudoType);
+
+  // Create the text node for the anonymous <div> element.
+  nsNodeInfoManager* nim = div->OwnerDoc()->NodeInfoManager();
+  RefPtr<nsTextNode> textNode = new (nim) nsTextNode(nim);
+  // If the anonymous div element is not for the placeholder, we should
+  // mark the text node as "maybe modified frequently" for avoiding ASCII
+  // range checks at every input.
+  if (aPseudoType != PseudoStyleType::placeholder) {
+    textNode->MarkAsMaybeModifiedFrequently();
+    // Additionally, this is a password field, the text node needs to be
+    // marked as "maybe masked" unless it's in placeholder.
+    if (IsPasswordTextControl()) {
+      textNode->MarkAsMaybeMasked();
+    }
+  }
+  div->AppendChildTo(textNode, false, IgnoreErrors());
+  return div.forget();
+}
+
+nsresult nsTextControlFrame::CreateAnonymousContent(
+    nsTArray<ContentInfo>& aElements) {
+  MOZ_ASSERT(!nsContentUtils::IsSafeToRunScript());
+  MOZ_ASSERT(mContent, "We should have a content!");
+
+  AddStateBits(NS_FRAME_INDEPENDENT_SELECTION);
+
+  RefPtr<TextControlElement> textControlElement = ControlElement();
+  mRootNode = MakeAnonElement(PseudoStyleType::mozTextControlEditingRoot);
+  if (NS_WARN_IF(!mRootNode)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  mMutationObserver = new nsAnonDivObserver(*this);
+  mRootNode->AddMutationObserver(mMutationObserver);
+
+  // Bind the frame to its text control.
+  //
+  // This can realistically fail in paginated mode, where we may replicate
+  // fixed-positioned elements and the replicated frame will not get the chance
+  // to get an editor.
+  nsresult rv = textControlElement->BindToFrame(this);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    mRootNode->RemoveMutationObserver(mMutationObserver);
+    mMutationObserver = nullptr;
+    mRootNode = nullptr;
+    return rv;
+  }
+
+  CreatePlaceholderIfNeeded();
+  if (mPlaceholderDiv) {
+    aElements.AppendElement(mPlaceholderDiv);
+  }
+  CreatePreviewIfNeeded();
+  if (mPreviewDiv) {
+    aElements.AppendElement(mPreviewDiv);
+  }
+
+  // NOTE(emilio): We want the root node always after the placeholder so that
+  // background on the placeholder doesn't obscure the caret.
+  aElements.AppendElement(mRootNode);
+
+  if (StaticPrefs::layout_forms_reveal_password_button_enabled() &&
+      IsPasswordTextControl()) {
+    mRevealButton =
+        MakeAnonElement(PseudoStyleType::mozReveal, nullptr, nsGkAtoms::button);
+    mRevealButton->SetAttr(kNameSpaceID_None, nsGkAtoms::aria_hidden,
+                           u"true"_ns, false);
+    mRevealButton->SetAttr(kNameSpaceID_None, nsGkAtoms::tabindex, u"-1"_ns,
+                           false);
+    aElements.AppendElement(mRevealButton);
+  }
+
+  rv = UpdateValueDisplay(false);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  InitializeEagerlyIfNeeded();
+  return NS_OK;
+}
+
+bool nsTextControlFrame::ShouldInitializeEagerly() const {
+  // textareas are eagerly initialized.
+  if (!IsSingleLineTextControl()) {
+    return true;
+  }
+
+  // Also, input elements which have a cached selection should get eager
+  // editor initialization.
+  TextControlElement* textControlElement = ControlElement();
+  if (textControlElement->HasCachedSelection()) {
+    return true;
+  }
+
+  // So do input text controls with spellcheck=true
+  if (auto* htmlElement = nsGenericHTMLElement::FromNode(mContent)) {
+    if (htmlElement->Spellcheck()) {
+      return true;
+    }
+  }
+
+  // If text in the editor is being dragged, we need the editor to create
+  // new source node for the drag session (TextEditor creates the text node
+  // in the anonymous <div> element.
+  if (nsCOMPtr<nsIDragSession> dragSession = nsContentUtils::GetDragSession()) {
+    if (dragSession->IsDraggingTextInTextControl()) {
+      nsCOMPtr<nsINode> sourceNode;
+      if (NS_SUCCEEDED(
+              dragSession->GetSourceNode(getter_AddRefs(sourceNode))) &&
+          sourceNode == textControlElement) {
+        return true;
+      }
+    }
+  }
+
+  return false;
+}
+
+void nsTextControlFrame::InitializeEagerlyIfNeeded() {
+  MOZ_ASSERT(!nsContentUtils::IsSafeToRunScript(),
+             "Someone forgot a script blocker?");
+  if (!ShouldInitializeEagerly()) {
+    return;
+  }
+
+  EditorInitializer* initializer = new EditorInitializer(this);
+  SetProperty(TextControlInitializer(), initializer);
+  nsContentUtils::AddScriptRunner(initializer);
+}
+
+void nsTextControlFrame::CreatePlaceholderIfNeeded() {
+  MOZ_ASSERT(!mPlaceholderDiv);
+
+  // Do we need a placeholder node?
+  nsAutoString placeholder;
+  if (!mContent->AsElement()->GetAttr(nsGkAtoms::placeholder, placeholder)) {
+    return;
+  }
+
+  mPlaceholderDiv = MakeAnonDivWithTextNode(PseudoStyleType::placeholder);
+  UpdatePlaceholderText(placeholder, false);
+}
+
+void nsTextControlFrame::PlaceholderChanged(const nsAttrValue* aOld,
+                                            const nsAttrValue* aNew) {
+  if (!aOld || !aNew) {
+    return;  // This should be handled by GetAttributeChangeHint.
+  }
+
+  // If we've changed the attribute but we still haven't reframed, there's
+  // nothing to do either.
+  if (!mPlaceholderDiv) {
+    return;
+  }
+
+  nsAutoString placeholder;
+  aNew->ToString(placeholder);
+  UpdatePlaceholderText(placeholder, true);
+}
+
+void nsTextControlFrame::UpdatePlaceholderText(nsString& aPlaceholder,
+                                               bool aNotify) {
+  MOZ_DIAGNOSTIC_ASSERT(mPlaceholderDiv);
+  MOZ_DIAGNOSTIC_ASSERT(mPlaceholderDiv->GetFirstChild());
+
+  if (IsTextArea()) {  // <textarea>s preserve newlines...
+    nsContentUtils::PlatformToDOMLineBreaks(aPlaceholder);
+  } else {  // ...<input>s don't
+    nsContentUtils::RemoveNewlines(aPlaceholder);
+  }
+
+  mPlaceholderDiv->GetFirstChild()->AsText()->SetText(aPlaceholder, aNotify);
+}
+
+void nsTextControlFrame::CreatePreviewIfNeeded() {
+  if (!ControlElement()->IsPreviewEnabled()) {
+    return;
+  }
+  mPreviewDiv = MakeAnonDivWithTextNode(PseudoStyleType::mozTextControlPreview);
+}
+
+void nsTextControlFrame::AppendAnonymousContentTo(
+    nsTArray<nsIContent*>& aElements, uint32_t aFilter) {
+  if (mPlaceholderDiv && !(aFilter & nsIContent::eSkipPlaceholderContent)) {
+    aElements.AppendElement(mPlaceholderDiv);
+  }
+
+  if (mPreviewDiv) {
+    aElements.AppendElement(mPreviewDiv);
+  }
+
+  if (mRevealButton) {
+    aElements.AppendElement(mRevealButton);
+  }
+
+  aElements.AppendElement(mRootNode);
+}
+
+nscoord nsTextControlFrame::GetPrefISize(gfxContext* aRenderingContext) {
+  nscoord result = 0;
+  DISPLAY_PREF_INLINE_SIZE(this, result);
+  float inflation = nsLayoutUtils::FontSizeInflationFor(this);
+  WritingMode wm = GetWritingMode();
+  result = CalcIntrinsicSize(aRenderingContext, wm, inflation).ISize(wm);
+  return result;
+}
+
+nscoord nsTextControlFrame::GetMinISize(gfxContext* aRenderingContext) {
+  // Our min inline size is just our preferred width if we have auto inline size
+  nscoord result;
+  DISPLAY_MIN_INLINE_SIZE(this, result);
+  result = GetPrefISize(aRenderingContext);
+  return result;
+}
+
+LogicalSize nsTextControlFrame::ComputeAutoSize(
+    gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
+    nscoord aAvailableISize, const LogicalSize& aMargin,
+    const LogicalSize& aBorderPadding, const StyleSizeOverrides& aSizeOverrides,
+    ComputeSizeFlags aFlags) {
+  float inflation = nsLayoutUtils::FontSizeInflationFor(this);
+  LogicalSize autoSize = CalcIntrinsicSize(aRenderingContext, aWM, inflation);
+
+  // Note: nsContainerFrame::ComputeAutoSize only computes the inline-size (and
+  // only for 'auto'), the block-size it returns is always NS_UNCONSTRAINEDSIZE.
+  const auto& styleISize = aSizeOverrides.mStyleISize
+                               ? *aSizeOverrides.mStyleISize
+                               : StylePosition()->ISize(aWM);
+  if (styleISize.IsAuto()) {
+    if (aFlags.contains(ComputeSizeFlag::IClampMarginBoxMinSize)) {
+      // CalcIntrinsicSize isn't aware of grid-item margin-box clamping, so we
+      // fall back to nsContainerFrame's ComputeAutoSize to handle that.
+      // XXX maybe a font-inflation issue here? (per the assertion below).
+      autoSize.ISize(aWM) =
+          nsContainerFrame::ComputeAutoSize(
+              aRenderingContext, aWM, aCBSize, aAvailableISize, aMargin,
+              aBorderPadding, aSizeOverrides, aFlags)
+              .ISize(aWM);
+    }
+#ifdef DEBUG
+    else {
+      LogicalSize ancestorAutoSize = nsContainerFrame::ComputeAutoSize(
+          aRenderingContext, aWM, aCBSize, aAvailableISize, aMargin,
+          aBorderPadding, aSizeOverrides, aFlags);
+      MOZ_ASSERT(inflation != 1.0f ||
+                     ancestorAutoSize.ISize(aWM) == autoSize.ISize(aWM),
+                 "Incorrect size computed by ComputeAutoSize?");
+    }
+#endif
+  }
+  return autoSize;
+}
+
+Maybe<nscoord> nsTextControlFrame::ComputeBaseline(
+    const nsIFrame* aFrame, const ReflowInput& aReflowInput,
+    bool aForSingleLineControl) {
+  // If we're layout-contained, we have no baseline.
+  if (aReflowInput.mStyleDisplay->IsContainLayout()) {
+    return Nothing();
+  }
+  WritingMode wm = aReflowInput.GetWritingMode();
+
+  nscoord lineHeight = aReflowInput.ComputedBSize();
+  if (!aForSingleLineControl || lineHeight == NS_UNCONSTRAINEDSIZE) {
+    lineHeight = aReflowInput.ApplyMinMaxBSize(aReflowInput.GetLineHeight());
+  }
+  RefPtr<nsFontMetrics> fontMet =
+      nsLayoutUtils::GetInflatedFontMetricsForFrame(aFrame);
+  return Some(nsLayoutUtils::GetCenteredFontBaseline(fontMet, lineHeight,
+                                                     wm.IsLineInverted()) +
+              aReflowInput.ComputedLogicalBorderPadding(wm).BStart(wm));
+}
+
+static bool IsButtonBox(const nsIFrame* aFrame) {
+  auto pseudoType = aFrame->Style()->GetPseudoType();
+  return pseudoType == PseudoStyleType::mozNumberSpinBox ||
+         pseudoType == PseudoStyleType::mozSearchClearButton ||
+         pseudoType == PseudoStyleType::mozReveal;
+}
+
+void nsTextControlFrame::Reflow(nsPresContext* aPresContext,
+                                ReflowOutput& aDesiredSize,
+                                const ReflowInput& aReflowInput,
+                                nsReflowStatus& aStatus) {
+  MarkInReflow();
+  DO_GLOBAL_REFLOW_COUNT("nsTextControlFrame");
+  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
+  MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
+
+  // set values of reflow's out parameters
+  WritingMode wm = aReflowInput.GetWritingMode();
+  aDesiredSize.SetSize(wm, aReflowInput.ComputedSizeWithBorderPadding(wm));
+
+  {
+    // Calculate the baseline and store it in mFirstBaseline.
+    auto baseline =
+        ComputeBaseline(this, aReflowInput, IsSingleLineTextControl());
+    mFirstBaseline = baseline.valueOr(NS_INTRINSIC_ISIZE_UNKNOWN);
+    if (baseline) {
+      aDesiredSize.SetBlockStartAscent(*baseline);
+    }
+  }
+
+  // overflow handling
+  aDesiredSize.SetOverflowAreasToDesiredBounds();
+
+  nsIFrame* buttonBox = [&]() -> nsIFrame* {
+    nsIFrame* last = mFrames.LastChild();
+    if (!last || !IsButtonBox(last)) {
+      return nullptr;
+    }
+    return last;
+  }();
+
+  // Reflow the button box first, so that we can use its size for the other
+  // frames.
+  nscoord buttonBoxISize = 0;
+  if (buttonBox) {
+    ReflowTextControlChild(buttonBox, aPresContext, aReflowInput, aStatus,
+                           aDesiredSize, buttonBoxISize);
+  }
+
+  // perform reflow on all kids
+  nsIFrame* kid = mFrames.FirstChild();
+  while (kid) {
+    if (kid != buttonBox) {
+      MOZ_ASSERT(!IsButtonBox(kid),
+                 "Should only have one button box, and should be last");
+      ReflowTextControlChild(kid, aPresContext, aReflowInput, aStatus,
+                             aDesiredSize, buttonBoxISize);
+    }
+    kid = kid->GetNextSibling();
+  }
+
+  // take into account css properties that affect overflow handling
+  FinishAndStoreOverflow(&aDesiredSize);
+
+  aStatus.Reset();  // This type of frame can't be split.
+}
+
+void nsTextControlFrame::ReflowTextControlChild(
+    nsIFrame* aKid, nsPresContext* aPresContext,
+    const ReflowInput& aReflowInput, nsReflowStatus& aStatus,
+    ReflowOutput& aParentDesiredSize, nscoord& aButtonBoxISize) {
+  const WritingMode outerWM = aReflowInput.GetWritingMode();
+  // compute available size and frame offsets for child
+  const WritingMode wm = aKid->GetWritingMode();
+  LogicalSize availSize = aReflowInput.ComputedSizeWithPadding(wm);
+  availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
+
+  bool isButtonBox = IsButtonBox(aKid);
+
+  ReflowInput kidReflowInput(aPresContext, aReflowInput, aKid, availSize,
+                             Nothing(), ReflowInput::InitFlag::CallerWillInit);
+
+  // Override padding with our computed padding in case we got it from theming
+  // or percentage, if we're not the button box.
+  auto overridePadding =
+      isButtonBox ? Nothing() : Some(aReflowInput.ComputedLogicalPadding(wm));
+  if (!isButtonBox && aButtonBoxISize) {
+    // Button box respects inline-end-padding, so we don't need to.
+    overridePadding->IEnd(outerWM) = 0;
+  }
+
+  // We want to let our button box fill the frame in the block axis, up to the
+  // edge of the control's border. So, we use the control's padding-box as the
+  // containing block size for our button box.
+  auto overrideCBSize =
+      isButtonBox ? Some(aReflowInput.ComputedSizeWithPadding(wm)) : Nothing();
+  kidReflowInput.Init(aPresContext, overrideCBSize, Nothing(), overridePadding);
+
+  LogicalPoint position(wm);
+  if (!isButtonBox) {
+    MOZ_ASSERT(wm == outerWM,
+               "Shouldn't have to care about orthogonal "
+               "writing-modes and such inside the control, "
+               "except for the number spin-box which forces "
+               "horizontal-tb");
+
+    const auto& border = aReflowInput.ComputedLogicalBorder(wm);
+
+    // Offset the frame by the size of the parent's border. Note that we don't
+    // have to account for the parent's padding here, because this child
+    // actually "inherits" that padding and manages it on behalf of the parent.
+    position.B(wm) = border.BStart(wm);
+    position.I(wm) = border.IStart(wm);
+
+    // Set computed width and computed height for the child (the button box is
+    // the only exception, which has an auto size).
+    kidReflowInput.SetComputedISize(
+        std::max(0, aReflowInput.ComputedISize() - aButtonBoxISize));
+    kidReflowInput.SetComputedBSize(aReflowInput.ComputedBSize());
+  }
+
+  // reflow the child
+  ReflowOutput desiredSize(aReflowInput);
+  const nsSize containerSize =
+      aReflowInput.ComputedSizeWithBorderPadding(outerWM).GetPhysicalSize(
+          outerWM);
+  ReflowChild(aKid, aPresContext, desiredSize, kidReflowInput, wm, position,
+              containerSize, ReflowChildFlags::Default, aStatus);
+
+  if (isButtonBox) {
+    const auto& bp = aReflowInput.ComputedLogicalBorderPadding(outerWM);
+    auto size = desiredSize.Size(outerWM);
+    // Center button in the block axis of our content box. We do this
+    // computation in terms of outerWM for simplicity.
+    LogicalRect buttonRect(outerWM);
+    buttonRect.BSize(outerWM) = size.BSize(outerWM);
+    buttonRect.ISize(outerWM) = size.ISize(outerWM);
+    buttonRect.BStart(outerWM) =
+        bp.BStart(outerWM) +
+        (aReflowInput.ComputedBSize() - size.BSize(outerWM)) / 2;
+    // Align to the inline-end of the content box.
+    buttonRect.IStart(outerWM) =
+        bp.IStart(outerWM) + aReflowInput.ComputedISize() - size.ISize(outerWM);
+    buttonRect = buttonRect.ConvertTo(wm, outerWM, containerSize);
+    position = buttonRect.Origin(wm);
+    aButtonBoxISize = size.ISize(outerWM);
+  }
+
+  // place the child
+  FinishReflowChild(aKid, aPresContext, desiredSize, &kidReflowInput, wm,
+                    position, containerSize, ReflowChildFlags::Default);
+
+  // consider the overflow
+  aParentDesiredSize.mOverflowAreas.UnionWith(desiredSize.mOverflowAreas);
+}
+
+// IMPLEMENTING NS_IFORMCONTROLFRAME
+void nsTextControlFrame::SetFocus(bool aOn, bool aRepaint) {
+  // If 'dom.placeholeder.show_on_focus' preference is 'false', focusing or
+  // blurring the frame can have an impact on the placeholder visibility.
+  if (!aOn) {
+    return;
+  }
+
+  nsISelectionController* selCon = GetSelectionController();
+  if (!selCon) {
+    return;
+  }
+
+  RefPtr<Selection> ourSel =
+      selCon->GetSelection(nsISelectionController::SELECTION_NORMAL);
+  if (!ourSel) {
+    return;
+  }
+
+  mozilla::PresShell* presShell = PresShell();
+  RefPtr<nsCaret> caret = presShell->GetCaret();
+  if (!caret) {
+    return;
+  }
+
+  // Tell the caret to use our selection
+  caret->SetSelection(ourSel);
+
+  // mutual-exclusion: the selection is either controlled by the
+  // document or by the text input/area. Clear any selection in the
+  // document since the focus is now on our independent selection.
+
+  RefPtr<Selection> docSel =
+      presShell->GetSelection(nsISelectionController::SELECTION_NORMAL);
+  if (!docSel) {
+    return;
+  }
+
+  if (!docSel->IsCollapsed()) {
+    docSel->RemoveAllRanges(IgnoreErrors());
+  }
+
+  // If the focus moved to a text control during text selection by pointer
+  // device, stop extending the selection.
+  if (RefPtr<nsFrameSelection> frameSelection = presShell->FrameSelection()) {
+    frameSelection->SetDragState(false);
+  }
+}
+
+nsresult nsTextControlFrame::SetFormProperty(nsAtom* aName,
+                                             const nsAString& aValue) {
+  if (!mIsProcessing) {  // some kind of lock.
+    mIsProcessing = true;
+    if (nsGkAtoms::select == aName) {
+      // Select all the text.
+      //
+      // XXX: This is lame, we can't call editor's SelectAll method
+      //      because that triggers AutoCopies in unix builds.
+      //      Instead, we have to call our own homegrown version
+      //      of select all which merely builds a range that selects
+      //      all of the content and adds that to the selection.
+
+      AutoWeakFrame weakThis = this;
+      SelectAllOrCollapseToEndOfText(true);  // NOTE: can destroy the world
+      if (!weakThis.IsAlive()) {
+        return NS_OK;
+      }
+    }
+    mIsProcessing = false;
+  }
+  return NS_OK;
+}
+
+already_AddRefed<TextEditor> nsTextControlFrame::GetTextEditor() {
+  if (NS_WARN_IF(NS_FAILED(EnsureEditorInitialized()))) {
+    return nullptr;
+  }
+  RefPtr el = ControlElement();
+  return do_AddRef(el->GetTextEditor());
+}
+
+nsresult nsTextControlFrame::SetSelectionInternal(
+    nsINode* aStartNode, uint32_t aStartOffset, nsINode* aEndNode,
+    uint32_t aEndOffset, SelectionDirection aDirection) {
+  // Get the selection, clear it and add the new range to it!
+  nsISelectionController* selCon = GetSelectionController();
+  NS_ENSURE_TRUE(selCon, NS_ERROR_FAILURE);
+
+  RefPtr<Selection> selection =
+      selCon->GetSelection(nsISelectionController::SELECTION_NORMAL);
+  NS_ENSURE_TRUE(selection, NS_ERROR_FAILURE);
+
+  nsDirection direction;
+  if (aDirection == SelectionDirection::None) {
+    // Preserve the direction
+    direction = selection->GetDirection();
+  } else {
+    direction =
+        aDirection == SelectionDirection::Backward ? eDirPrevious : eDirNext;
+  }
+
+  MOZ_TRY(selection->SetStartAndEndInLimiter(*aStartNode, aStartOffset,
+                                             *aEndNode, aEndOffset, direction,
+                                             nsISelectionListener::JS_REASON));
+  return NS_OK;
+}
+
+void nsTextControlFrame::ScrollSelectionIntoViewAsync(
+    ScrollAncestors aScrollAncestors) {
+  nsISelectionController* selCon = GetSelectionController();
+  if (!selCon) {
+    return;
+  }
+
+  int16_t flags = aScrollAncestors == ScrollAncestors::Yes
+                      ? 0
+                      : nsISelectionController::SCROLL_FIRST_ANCESTOR_ONLY;
+
+  // Scroll the selection into view (see bug 231389).
+  selCon->ScrollSelectionIntoView(
+      nsISelectionController::SELECTION_NORMAL,
+      nsISelectionController::SELECTION_FOCUS_REGION, flags);
+}
+
+nsresult nsTextControlFrame::SelectAllOrCollapseToEndOfText(bool aSelect) {
+  nsresult rv = EnsureEditorInitialized();
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  RefPtr<nsINode> rootNode = mRootNode;
+  NS_ENSURE_TRUE(rootNode, NS_ERROR_FAILURE);
+
+  RefPtr<Text> text = Text::FromNodeOrNull(rootNode->GetFirstChild());
+  MOZ_ASSERT(text);
+
+  uint32_t length = text->Length();
+
+  rv = SetSelectionInternal(text, aSelect ? 0 : length, text, length);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  ScrollSelectionIntoViewAsync();
+  return NS_OK;
+}
+
+nsresult nsTextControlFrame::SetSelectionEndPoints(
+    uint32_t aSelStart, uint32_t aSelEnd,
+    nsITextControlFrame::SelectionDirection aDirection) {
+  NS_ASSERTION(aSelStart <= aSelEnd, "Invalid selection offsets!");
+
+  if (aSelStart > aSelEnd) return NS_ERROR_FAILURE;
+
+  nsCOMPtr<nsINode> startNode, endNode;
+  uint32_t startOffset, endOffset;
+
+  // Calculate the selection start point.
+
+  nsresult rv =
+      OffsetToDOMPoint(aSelStart, getter_AddRefs(startNode), &startOffset);
+
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (aSelStart == aSelEnd) {
+    // Collapsed selection, so start and end are the same!
+    endNode = startNode;
+    endOffset = startOffset;
+  } else {
+    // Selection isn't collapsed so we have to calculate
+    // the end point too.
+
+    rv = OffsetToDOMPoint(aSelEnd, getter_AddRefs(endNode), &endOffset);
+
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+
+  return SetSelectionInternal(startNode, startOffset, endNode, endOffset,
+                              aDirection);
+}
+
+NS_IMETHODIMP
+nsTextControlFrame::SetSelectionRange(
+    uint32_t aSelStart, uint32_t aSelEnd,
+    nsITextControlFrame::SelectionDirection aDirection) {
+  nsresult rv = EnsureEditorInitialized();
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (aSelStart > aSelEnd) {
+    // Simulate what we'd see SetSelectionStart() was called, followed
+    // by a SetSelectionEnd().
+
+    aSelStart = aSelEnd;
+  }
+
+  return SetSelectionEndPoints(aSelStart, aSelEnd, aDirection);
+}
+
+nsresult nsTextControlFrame::OffsetToDOMPoint(uint32_t aOffset,
+                                              nsINode** aResult,
+                                              uint32_t* aPosition) {
+  NS_ENSURE_ARG_POINTER(aResult && aPosition);
+
+  *aResult = nullptr;
+  *aPosition = 0;
+
+  nsresult rv = EnsureEditorInitialized();
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return rv;
+  }
+
+  RefPtr<Element> rootNode = mRootNode;
+  NS_ENSURE_TRUE(rootNode, NS_ERROR_FAILURE);
+
+  nsCOMPtr<nsINodeList> nodeList = rootNode->ChildNodes();
+  uint32_t length = nodeList->Length();
+
+  NS_ASSERTION(length <= 2,
+               "We should have one text node and one mozBR at most");
+
+  nsCOMPtr<nsINode> firstNode = nodeList->Item(0);
+  Text* textNode = firstNode ? firstNode->GetAsText() : nullptr;
+
+  if (length == 0) {
+    rootNode.forget(aResult);
+    *aPosition = 0;
+  } else if (textNode) {
+    uint32_t textLength = textNode->Length();
+    firstNode.forget(aResult);
+    *aPosition = std::min(aOffset, textLength);
+  } else {
+    rootNode.forget(aResult);
+    *aPosition = 0;
+  }
+
+  return NS_OK;
+}
+
+/////END INTERFACE IMPLEMENTATIONS
+
+////NSIFRAME
+nsresult nsTextControlFrame::AttributeChanged(int32_t aNameSpaceID,
+                                              nsAtom* aAttribute,
+                                              int32_t aModType) {
+  if (aAttribute == nsGkAtoms::value && !mEditorHasBeenInitialized) {
+    UpdateValueDisplay(true);
+    return NS_OK;
+  }
+
+  if (aAttribute == nsGkAtoms::maxlength) {
+    if (RefPtr<TextEditor> textEditor = GetTextEditor()) {
+      textEditor->SetMaxTextLength(ControlElement()->UsedMaxLength());
+      return NS_OK;
+    }
+  }
+  return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
+}
+
+void nsTextControlFrame::HandleReadonlyOrDisabledChange() {
+  RefPtr<TextControlElement> el = ControlElement();
+  RefPtr<TextEditor> editor = el->GetTextEditorWithoutCreation();
+  if (!editor) {
+    return;
+  }
+  nsISelectionController* selCon = el->GetSelectionController();
+  if (!selCon) {
+    return;
+  }
+  if (el->IsDisabledOrReadOnly()) {
+    if (nsContentUtils::IsFocusedContent(el)) {
+      selCon->SetCaretEnabled(false);
+    }
+    editor->AddFlags(nsIEditor::eEditorReadonlyMask);
+  } else {
+    if (nsContentUtils::IsFocusedContent(el)) {
+      selCon->SetCaretEnabled(true);
+    }
+    editor->RemoveFlags(nsIEditor::eEditorReadonlyMask);
+  }
+}
+
+void nsTextControlFrame::ElementStateChanged(dom::ElementState aStates) {
+  if (aStates.HasAtLeastOneOfStates(dom::ElementState::READONLY |
+                                    dom::ElementState::DISABLED)) {
+    HandleReadonlyOrDisabledChange();
+  }
+  return nsContainerFrame::ElementStateChanged(aStates);
+}
+
+/// END NSIFRAME OVERLOADS
+
+// NOTE(emilio): This is needed because the root->primary frame map is not set
+// up by the time this is called.
+static nsIFrame* FindRootNodeFrame(const nsFrameList& aChildList,
+                                   const nsIContent* aRoot) {
+  for (nsIFrame* f : aChildList) {
+    if (f->GetContent() == aRoot) {
+      return f;
+    }
+    if (nsIFrame* root = FindRootNodeFrame(f->PrincipalChildList(), aRoot)) {
+      return root;
+    }
+  }
+  return nullptr;
+}
+
+void nsTextControlFrame::SetInitialChildList(ChildListID aListID,
+                                             nsFrameList&& aChildList) {
+  nsContainerFrame::SetInitialChildList(aListID, std::move(aChildList));
+  if (aListID != FrameChildListID::Principal) {
+    return;
+  }
+
+  // Mark the scroll frame as being a reflow root. This will allow incremental
+  // reflows to be initiated at the scroll frame, rather than descending from
+  // the root frame of the frame hierarchy.
+  if (nsIFrame* frame = FindRootNodeFrame(PrincipalChildList(), mRootNode)) {
+    frame->AddStateBits(NS_FRAME_REFLOW_ROOT);
+
+    ControlElement()->InitializeKeyboardEventListeners();
+
+    bool hasProperty;
+    nsPoint contentScrollPos = TakeProperty(ContentScrollPos(), &hasProperty);
+    if (hasProperty) {
+      // If we have a scroll pos stored to be passed to our anonymous
+      // div, do it here!
+      nsIStatefulFrame* statefulFrame = do_QueryFrame(frame);
+      NS_ASSERTION(statefulFrame,
+                   "unexpected type of frame for the anonymous div");
+      UniquePtr<PresState> fakePresState = NewPresState();
+      fakePresState->scrollState() = contentScrollPos;
+      statefulFrame->RestoreState(fakePresState.get());
+    }
+  } else {
+    MOZ_ASSERT(!mRootNode || PrincipalChildList().IsEmpty());
+  }
+}
+
+nsresult nsTextControlFrame::UpdateValueDisplay(bool aNotify,
+                                                bool aBeforeEditorInit,
+                                                const nsAString* aValue) {
+  if (!IsSingleLineTextControl()) {  // textareas don't use this
+    return NS_OK;
+  }
+
+  MOZ_ASSERT(mRootNode, "Must have a div content\n");
+  MOZ_ASSERT(!mEditorHasBeenInitialized,
+             "Do not call this after editor has been initialized");
+
+  nsIContent* childContent = mRootNode->GetFirstChild();
+  Text* textContent;
+  if (!childContent) {
+    // Set up a textnode with our value
+    RefPtr<nsTextNode> textNode = new (mContent->NodeInfo()->NodeInfoManager())
+        nsTextNode(mContent->NodeInfo()->NodeInfoManager());
+    textNode->MarkAsMaybeModifiedFrequently();
+    if (IsPasswordTextControl()) {
+      textNode->MarkAsMaybeMasked();
+    }
+    mRootNode->AppendChildTo(textNode, aNotify, IgnoreErrors());
+    textContent = textNode;
+  } else {
+    textContent = childContent->GetAsText();
+  }
+
+  NS_ENSURE_TRUE(textContent, NS_ERROR_UNEXPECTED);
+
+  // Get the current value of the textfield from the content.
+  nsAutoString value;
+  if (aValue) {
+    value = *aValue;
+  } else {
+    ControlElement()->GetTextEditorValue(value);
+  }
+
+  return textContent->SetText(value, aNotify);
+}
+
+NS_IMETHODIMP
+nsTextControlFrame::GetOwnedSelectionController(
+    nsISelectionController** aSelCon) {
+  NS_ENSURE_ARG_POINTER(aSelCon);
+  NS_IF_ADDREF(*aSelCon = GetSelectionController());
+  return NS_OK;
+}
+
+UniquePtr<PresState> nsTextControlFrame::SaveState() {
+  if (nsIStatefulFrame* scrollStateFrame =
+          do_QueryFrame(GetScrollTargetFrame())) {
+    return scrollStateFrame->SaveState();
+  }
+
+  return nullptr;
+}
+
+NS_IMETHODIMP
+nsTextControlFrame::RestoreState(PresState* aState) {
+  NS_ENSURE_ARG_POINTER(aState);
+
+  // Query the nsIStatefulFrame from the HTMLScrollFrame
+  if (nsIStatefulFrame* scrollStateFrame =
+          do_QueryFrame(GetScrollTargetFrame())) {
+    return scrollStateFrame->RestoreState(aState);
+  }
+
+  // Most likely, we don't have our anonymous content constructed yet, which
+  // would cause us to end up here.  In this case, we'll just store the scroll
+  // pos ourselves, and forward it to the scroll frame later when it's created.
+  SetProperty(ContentScrollPos(), aState->scrollState());
+  return NS_OK;
+}
+
+nsresult nsTextControlFrame::PeekOffset(PeekOffsetStruct* aPos) {
+  return NS_ERROR_FAILURE;
+}
+
+void nsTextControlFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                                          const nsDisplayListSet& aLists) {
+  DO_GLOBAL_REFLOW_COUNT_DSP("nsTextControlFrame");
+
+  DisplayBorderBackgroundOutline(aBuilder, aLists);
+
+  // Redirect all lists to the Content list so that nothing can escape, ie
+  // opacity creating stacking contexts that then get sorted with stacking
+  // contexts external to us.
+  nsDisplayList* content = aLists.Content();
+  nsDisplayListSet set(content, content, content, content, content, content);
+
+  for (auto* kid : mFrames) {
+    BuildDisplayListForChild(aBuilder, kid, set);
+  }
+}
+
+NS_IMETHODIMP
+nsTextControlFrame::EditorInitializer::Run() {
+  if (!mFrame) {
+    return NS_OK;
+  }
+
+  // Need to block script to avoid bug 669767.
+  nsAutoScriptBlocker scriptBlocker;
+
+  RefPtr<mozilla::PresShell> presShell = mFrame->PresShell();
+  bool observes = presShell->ObservesNativeAnonMutationsForPrint();
+  presShell->ObserveNativeAnonMutationsForPrint(true);
+  // This can cause the frame to be destroyed (and call Revoke()).
+  mFrame->EnsureEditorInitialized();
+  presShell->ObserveNativeAnonMutationsForPrint(observes);
+
+  // The frame can *still* be destroyed even though we have a scriptblocker,
+  // bug 682684.
+  if (!mFrame) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // If there is a drag session which is for dragging text in a text control
+  // and its source node is the text control element, we're being reframed.
+  // In this case we should restore the source node of the drag session to
+  // new text node because it's required for dispatching `dragend` event.
+  if (nsCOMPtr<nsIDragSession> dragSession = nsContentUtils::GetDragSession()) {
+    if (dragSession->IsDraggingTextInTextControl()) {
+      nsCOMPtr<nsINode> sourceNode;
+      if (NS_SUCCEEDED(
+              dragSession->GetSourceNode(getter_AddRefs(sourceNode))) &&
+          mFrame->GetContent() == sourceNode) {
+        if (TextEditor* textEditor =
+                mFrame->ControlElement()->GetTextEditorWithoutCreation()) {
+          if (Element* anonymousDivElement = textEditor->GetRoot()) {
+            if (anonymousDivElement && anonymousDivElement->GetFirstChild()) {
+              MOZ_ASSERT(anonymousDivElement->GetFirstChild()->IsText());
+              dragSession->UpdateSource(anonymousDivElement->GetFirstChild(),
+                                        textEditor->GetSelection());
+            }
+          }
+        }
+      }
+    }
+  }
+  // Otherwise, EventStateManager may be tracking gesture to start a drag.
+  else {
+    TextControlElement* textControlElement = mFrame->ControlElement();
+    if (nsPresContext* presContext =
+            textControlElement->GetPresContext(Element::eForComposedDoc)) {
+      if (TextEditor* textEditor =
+              textControlElement->GetTextEditorWithoutCreation()) {
+        if (Element* anonymousDivElement = textEditor->GetRoot()) {
+          presContext->EventStateManager()->TextControlRootAdded(
+              *anonymousDivElement, *textControlElement);
+        }
+      }
+    }
+  }
+
+  mFrame->FinishedInitializer();
+  return NS_OK;
+}
+
+NS_IMPL_ISUPPORTS(nsTextControlFrame::nsAnonDivObserver, nsIMutationObserver)
+
+void nsTextControlFrame::nsAnonDivObserver::CharacterDataChanged(
+    nsIContent* aContent, const CharacterDataChangeInfo&) {
+  mFrame.ClearCachedValue();
+}
+
+void nsTextControlFrame::nsAnonDivObserver::ContentAppended(
+    nsIContent* aFirstNewContent) {
+  mFrame.ClearCachedValue();
+}
+
+void nsTextControlFrame::nsAnonDivObserver::ContentInserted(
+    nsIContent* aChild) {
+  mFrame.ClearCachedValue();
+}
+
+void nsTextControlFrame::nsAnonDivObserver::ContentRemoved(
+    nsIContent* aChild, nsIContent* aPreviousSibling) {
+  mFrame.ClearCachedValue();
+}
+
+Maybe<nscoord> nsTextControlFrame::GetNaturalBaselineBOffset(
+    mozilla::WritingMode aWM, BaselineSharingGroup aBaselineGroup,
+    BaselineExportContext aExportContext) const {
+  if (!IsSingleLineTextControl()) {
+    if (StyleDisplay()->IsContainLayout()) {
+      return Nothing{};
+    }
+
+    if (aBaselineGroup == BaselineSharingGroup::First) {
+      return Some(std::clamp(mFirstBaseline, 0, BSize(aWM)));
+    }
+    // This isn't great, but the content of the root NAC isn't guaranteed
+    // to be loaded, so the best we can do is the edge of the border-box.
+    if (aWM.IsCentralBaseline()) {
+      return Some(BSize(aWM) / 2);
+    }
+    return Some(0);
+  }
+  NS_ASSERTION(!IsSubtreeDirty(), "frame must not be dirty");
+  return GetSingleLineTextControlBaseline(this, mFirstBaseline, aWM,
+                                          aBaselineGroup);
+}
-- 
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