Add m-esr52 at 52.6.0

1 files changed, 775 insertions, 0 deletions

diff --git a/widget/nsNativeTheme.cpp b/widget/nsNativeTheme.cpp
new file mode 100644
index 0000000000..a5bd85fafa
--- /dev/null
+++ b/widget/nsNativeTheme.cpp
@@ -0,0 +1,775 @@
+/* -*- 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 "nsNativeTheme.h"
+#include "nsIWidget.h"
+#include "nsIDocument.h"
+#include "nsIContent.h"
+#include "nsIFrame.h"
+#include "nsIPresShell.h"
+#include "nsNumberControlFrame.h"
+#include "nsPresContext.h"
+#include "nsString.h"
+#include "nsNameSpaceManager.h"
+#include "nsIDOMHTMLInputElement.h"
+#include "nsIDOMXULMenuListElement.h"
+#include "nsThemeConstants.h"
+#include "nsIComponentManager.h"
+#include "nsPIDOMWindow.h"
+#include "nsProgressFrame.h"
+#include "nsMeterFrame.h"
+#include "nsMenuFrame.h"
+#include "nsRangeFrame.h"
+#include "nsCSSRendering.h"
+#include "mozilla/EventStates.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/HTMLBodyElement.h"
+#include "mozilla/dom/HTMLProgressElement.h"
+#include "nsIDocumentInlines.h"
+#include <algorithm>
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsNativeTheme::nsNativeTheme()
+: mAnimatedContentTimeout(UINT32_MAX)
+{
+}
+
+NS_IMPL_ISUPPORTS(nsNativeTheme, nsITimerCallback)
+
+nsIPresShell *
+nsNativeTheme::GetPresShell(nsIFrame* aFrame)
+{
+  if (!aFrame)
+    return nullptr;
+
+  nsPresContext* context = aFrame->PresContext();
+  return context ? context->GetPresShell() : nullptr;
+}
+
+EventStates
+nsNativeTheme::GetContentState(nsIFrame* aFrame, uint8_t aWidgetType)
+{
+  if (!aFrame)
+    return EventStates();
+
+  bool isXULCheckboxRadio = 
+    (aWidgetType == NS_THEME_CHECKBOX ||
+     aWidgetType == NS_THEME_RADIO) &&
+    aFrame->GetContent()->IsXULElement();
+  if (isXULCheckboxRadio)
+    aFrame = aFrame->GetParent();
+
+  if (!aFrame->GetContent())
+    return EventStates();
+
+  nsIPresShell *shell = GetPresShell(aFrame);
+  if (!shell)
+    return EventStates();
+
+  nsIContent* frameContent = aFrame->GetContent();
+  EventStates flags;
+  if (frameContent->IsElement()) {
+    flags = frameContent->AsElement()->State();
+
+    // <input type=number> needs special handling since its nested native
+    // anonymous <input type=text> takes focus for it.
+    if (aWidgetType == NS_THEME_NUMBER_INPUT &&
+        frameContent->IsHTMLElement(nsGkAtoms::input)) {
+      nsNumberControlFrame *numberControlFrame = do_QueryFrame(aFrame);
+      if (numberControlFrame && numberControlFrame->IsFocused()) {
+        flags |= NS_EVENT_STATE_FOCUS;
+      }
+    }
+
+    nsNumberControlFrame* numberControlFrame =
+      nsNumberControlFrame::GetNumberControlFrameForSpinButton(aFrame);
+    if (numberControlFrame &&
+        numberControlFrame->GetContent()->AsElement()->State().
+          HasState(NS_EVENT_STATE_DISABLED)) {
+      flags |= NS_EVENT_STATE_DISABLED;
+    }
+  }
+  
+  if (isXULCheckboxRadio && aWidgetType == NS_THEME_RADIO) {
+    if (IsFocused(aFrame))
+      flags |= NS_EVENT_STATE_FOCUS;
+  }
+
+  // On Windows and Mac, only draw focus rings if they should be shown. This
+  // means that focus rings are only shown once the keyboard has been used to
+  // focus something in the window.
+#if defined(XP_MACOSX)
+  // Mac always draws focus rings for textboxes and lists.
+  if (aWidgetType == NS_THEME_NUMBER_INPUT ||
+      aWidgetType == NS_THEME_TEXTFIELD ||
+      aWidgetType == NS_THEME_TEXTFIELD_MULTILINE ||
+      aWidgetType == NS_THEME_SEARCHFIELD ||
+      aWidgetType == NS_THEME_LISTBOX) {
+    return flags;
+  }
+#endif
+#if defined(XP_WIN)
+  // On Windows, focused buttons are always drawn as such by the native theme.
+  if (aWidgetType == NS_THEME_BUTTON)
+    return flags;
+#endif    
+#if defined(XP_MACOSX) || defined(XP_WIN)
+  nsIDocument* doc = aFrame->GetContent()->OwnerDoc();
+  nsPIDOMWindowOuter* window = doc->GetWindow();
+  if (window && !window->ShouldShowFocusRing())
+    flags &= ~NS_EVENT_STATE_FOCUS;
+#endif
+  
+  return flags;
+}
+
+/* static */
+bool
+nsNativeTheme::CheckBooleanAttr(nsIFrame* aFrame, nsIAtom* aAtom)
+{
+  if (!aFrame)
+    return false;
+
+  nsIContent* content = aFrame->GetContent();
+  if (!content)
+    return false;
+
+  if (content->IsHTMLElement())
+    return content->HasAttr(kNameSpaceID_None, aAtom);
+
+  // For XML/XUL elements, an attribute must be equal to the literal
+  // string "true" to be counted as true.  An empty string should _not_
+  // be counted as true.
+  return content->AttrValueIs(kNameSpaceID_None, aAtom,
+                              NS_LITERAL_STRING("true"), eCaseMatters);
+}
+
+/* static */
+int32_t
+nsNativeTheme::CheckIntAttr(nsIFrame* aFrame, nsIAtom* aAtom, int32_t defaultValue)
+{
+  if (!aFrame)
+    return defaultValue;
+
+  nsAutoString attr;
+  aFrame->GetContent()->GetAttr(kNameSpaceID_None, aAtom, attr);
+  nsresult err;
+  int32_t value = attr.ToInteger(&err);
+  if (attr.IsEmpty() || NS_FAILED(err))
+    return defaultValue;
+
+  return value;
+}
+
+/* static */
+double
+nsNativeTheme::GetProgressValue(nsIFrame* aFrame)
+{
+  // When we are using the HTML progress element,
+  // we can get the value from the IDL property.
+  if (aFrame && aFrame->GetContent()->IsHTMLElement(nsGkAtoms::progress)) {
+    return static_cast<HTMLProgressElement*>(aFrame->GetContent())->Value();
+  }
+
+  return (double)nsNativeTheme::CheckIntAttr(aFrame, nsGkAtoms::value, 0);
+}
+
+/* static */
+double
+nsNativeTheme::GetProgressMaxValue(nsIFrame* aFrame)
+{
+  // When we are using the HTML progress element,
+  // we can get the max from the IDL property.
+  if (aFrame && aFrame->GetContent()->IsHTMLElement(nsGkAtoms::progress)) {
+    return static_cast<HTMLProgressElement*>(aFrame->GetContent())->Max();
+  }
+
+  return (double)std::max(nsNativeTheme::CheckIntAttr(aFrame, nsGkAtoms::max, 100), 1);
+}
+
+bool
+nsNativeTheme::GetCheckedOrSelected(nsIFrame* aFrame, bool aCheckSelected)
+{
+  if (!aFrame)
+    return false;
+
+  nsIContent* content = aFrame->GetContent();
+
+  if (content->IsXULElement()) {
+    // For a XUL checkbox or radio button, the state of the parent determines
+    // the checked state
+    aFrame = aFrame->GetParent();
+  } else {
+    // Check for an HTML input element
+    nsCOMPtr<nsIDOMHTMLInputElement> inputElt = do_QueryInterface(content);
+    if (inputElt) {
+      bool checked;
+      inputElt->GetChecked(&checked);
+      return checked;
+    }
+  }
+
+  return CheckBooleanAttr(aFrame, aCheckSelected ? nsGkAtoms::selected
+                                                 : nsGkAtoms::checked);
+}
+
+bool
+nsNativeTheme::IsButtonTypeMenu(nsIFrame* aFrame)
+{
+  if (!aFrame)
+    return false;
+
+  nsIContent* content = aFrame->GetContent();
+  return content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
+                              NS_LITERAL_STRING("menu"), eCaseMatters);
+}
+
+bool
+nsNativeTheme::IsPressedButton(nsIFrame* aFrame)
+{
+  EventStates eventState = GetContentState(aFrame, NS_THEME_TOOLBARBUTTON);
+  if (IsDisabled(aFrame, eventState))
+    return false;
+
+  return IsOpenButton(aFrame) ||
+         eventState.HasAllStates(NS_EVENT_STATE_ACTIVE | NS_EVENT_STATE_HOVER);
+}
+
+
+bool
+nsNativeTheme::GetIndeterminate(nsIFrame* aFrame)
+{
+  if (!aFrame)
+    return false;
+
+  nsIContent* content = aFrame->GetContent();
+
+  if (content->IsXULElement()) {
+    // For a XUL checkbox or radio button, the state of the parent determines
+    // the state
+    return CheckBooleanAttr(aFrame->GetParent(), nsGkAtoms::indeterminate);
+  }
+
+  // Check for an HTML input element
+  nsCOMPtr<nsIDOMHTMLInputElement> inputElt = do_QueryInterface(content);
+  if (inputElt) {
+    bool indeterminate;
+    inputElt->GetIndeterminate(&indeterminate);
+    return indeterminate;
+  }
+
+  return false;
+}
+
+bool
+nsNativeTheme::IsWidgetStyled(nsPresContext* aPresContext, nsIFrame* aFrame,
+                              uint8_t aWidgetType)
+{
+  // Check for specific widgets to see if HTML has overridden the style.
+  if (!aFrame)
+    return false;
+
+  // Resizers have some special handling, dependent on whether in a scrollable
+  // container or not. If so, use the scrollable container's to determine
+  // whether the style is overriden instead of the resizer. This allows a
+  // non-native transparent resizer to be used instead. Otherwise, we just
+  // fall through and return false.
+  if (aWidgetType == NS_THEME_RESIZER) {
+    nsIFrame* parentFrame = aFrame->GetParent();
+    if (parentFrame && parentFrame->GetType() == nsGkAtoms::scrollFrame) {
+      // if the parent is a scrollframe, the resizer should be native themed
+      // only if the scrollable area doesn't override the widget style.
+      parentFrame = parentFrame->GetParent();
+      if (parentFrame) {
+        return IsWidgetStyled(aPresContext, parentFrame,
+                              parentFrame->StyleDisplay()->mAppearance);
+      }
+    }
+  }
+
+  /**
+   * Progress bar appearance should be the same for the bar and the container
+   * frame. nsProgressFrame owns the logic and will tell us what we should do.
+   */
+  if (aWidgetType == NS_THEME_PROGRESSCHUNK ||
+      aWidgetType == NS_THEME_PROGRESSBAR) {
+    nsProgressFrame* progressFrame = do_QueryFrame(aWidgetType == NS_THEME_PROGRESSCHUNK
+                                       ? aFrame->GetParent() : aFrame);
+    if (progressFrame) {
+      return !progressFrame->ShouldUseNativeStyle();
+    }
+  }
+
+  /**
+   * Meter bar appearance should be the same for the bar and the container
+   * frame. nsMeterFrame owns the logic and will tell us what we should do.
+   */
+  if (aWidgetType == NS_THEME_METERCHUNK ||
+      aWidgetType == NS_THEME_METERBAR) {
+    nsMeterFrame* meterFrame = do_QueryFrame(aWidgetType == NS_THEME_METERCHUNK
+                                       ? aFrame->GetParent() : aFrame);
+    if (meterFrame) {
+      return !meterFrame->ShouldUseNativeStyle();
+    }
+  }
+
+  /**
+   * An nsRangeFrame and its children are treated atomically when it
+   * comes to native theming (either all parts, or no parts, are themed).
+   * nsRangeFrame owns the logic and will tell us what we should do.
+   */
+  if (aWidgetType == NS_THEME_RANGE ||
+      aWidgetType == NS_THEME_RANGE_THUMB) {
+    nsRangeFrame* rangeFrame =
+      do_QueryFrame(aWidgetType == NS_THEME_RANGE_THUMB
+                      ? aFrame->GetParent() : aFrame);
+    if (rangeFrame) {
+      return !rangeFrame->ShouldUseNativeStyle();
+    }
+  }
+
+  if (aWidgetType == NS_THEME_SPINNER_UPBUTTON ||
+      aWidgetType == NS_THEME_SPINNER_DOWNBUTTON) {
+    nsNumberControlFrame* numberControlFrame =
+      nsNumberControlFrame::GetNumberControlFrameForSpinButton(aFrame);
+    if (numberControlFrame) {
+      return !numberControlFrame->ShouldUseNativeStyleForSpinner();
+    }
+  }
+
+  return (aWidgetType == NS_THEME_NUMBER_INPUT ||
+          aWidgetType == NS_THEME_BUTTON ||
+          aWidgetType == NS_THEME_TEXTFIELD ||
+          aWidgetType == NS_THEME_TEXTFIELD_MULTILINE ||
+          aWidgetType == NS_THEME_LISTBOX ||
+          aWidgetType == NS_THEME_MENULIST) &&
+         aFrame->GetContent()->IsHTMLElement() &&
+         aPresContext->HasAuthorSpecifiedRules(aFrame,
+                                               NS_AUTHOR_SPECIFIED_BORDER |
+                                               NS_AUTHOR_SPECIFIED_BACKGROUND);
+}
+
+bool
+nsNativeTheme::IsDisabled(nsIFrame* aFrame, EventStates aEventStates)
+{
+  if (!aFrame) {
+    return false;
+  }
+
+  nsIContent* content = aFrame->GetContent();
+  if (!content) {
+    return false;
+  }
+
+  if (content->IsHTMLElement()) {
+    return aEventStates.HasState(NS_EVENT_STATE_DISABLED);
+  }
+
+  // For XML/XUL elements, an attribute must be equal to the literal
+  // string "true" to be counted as true.  An empty string should _not_
+  // be counted as true.
+  return content->AttrValueIs(kNameSpaceID_None, nsGkAtoms::disabled,
+                              NS_LITERAL_STRING("true"), eCaseMatters);
+}
+
+/* static */ bool
+nsNativeTheme::IsFrameRTL(nsIFrame* aFrame)
+{
+  if (!aFrame) {
+    return false;
+  }
+  WritingMode wm = aFrame->GetWritingMode();
+  return !(wm.IsVertical() ? wm.IsVerticalLR() : wm.IsBidiLTR());
+}
+
+bool
+nsNativeTheme::IsHTMLContent(nsIFrame *aFrame)
+{
+  if (!aFrame) {
+    return false;
+  }
+  nsIContent* content = aFrame->GetContent();
+  return content && content->IsHTMLElement();
+}
+
+
+// scrollbar button:
+int32_t
+nsNativeTheme::GetScrollbarButtonType(nsIFrame* aFrame)
+{
+  if (!aFrame)
+    return 0;
+
+  static nsIContent::AttrValuesArray strings[] =
+    {&nsGkAtoms::scrollbarDownBottom, &nsGkAtoms::scrollbarDownTop,
+     &nsGkAtoms::scrollbarUpBottom, &nsGkAtoms::scrollbarUpTop,
+     nullptr};
+
+  switch (aFrame->GetContent()->FindAttrValueIn(kNameSpaceID_None,
+                                                nsGkAtoms::sbattr,
+                                                strings, eCaseMatters)) {
+    case 0: return eScrollbarButton_Down | eScrollbarButton_Bottom;
+    case 1: return eScrollbarButton_Down;
+    case 2: return eScrollbarButton_Bottom;
+    case 3: return eScrollbarButton_UpTop;
+  }
+
+  return 0;
+}
+
+// treeheadercell:
+nsNativeTheme::TreeSortDirection
+nsNativeTheme::GetTreeSortDirection(nsIFrame* aFrame)
+{
+  if (!aFrame || !aFrame->GetContent())
+    return eTreeSortDirection_Natural;
+
+  static nsIContent::AttrValuesArray strings[] =
+    {&nsGkAtoms::descending, &nsGkAtoms::ascending, nullptr};
+  switch (aFrame->GetContent()->FindAttrValueIn(kNameSpaceID_None,
+                                                nsGkAtoms::sortDirection,
+                                                strings, eCaseMatters)) {
+    case 0: return eTreeSortDirection_Descending;
+    case 1: return eTreeSortDirection_Ascending;
+  }
+
+  return eTreeSortDirection_Natural;
+}
+
+bool
+nsNativeTheme::IsLastTreeHeaderCell(nsIFrame* aFrame)
+{
+  if (!aFrame)
+    return false;
+
+  // A tree column picker is always the last header cell.
+  if (aFrame->GetContent()->IsXULElement(nsGkAtoms::treecolpicker))
+    return true;
+
+  // Find the parent tree.
+  nsIContent* parent = aFrame->GetContent()->GetParent();
+  while (parent && !parent->IsXULElement(nsGkAtoms::tree)) {
+    parent = parent->GetParent();
+  }
+
+  // If the column picker is visible, this can't be the last column.
+  if (parent && !parent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::hidecolumnpicker,
+                                     NS_LITERAL_STRING("true"), eCaseMatters))
+    return false;
+
+  while ((aFrame = aFrame->GetNextSibling())) {
+    if (aFrame->GetRect().width > 0)
+      return false;
+  }
+  return true;
+}
+
+// tab:
+bool
+nsNativeTheme::IsBottomTab(nsIFrame* aFrame)
+{
+  if (!aFrame)
+    return false;
+
+  nsAutoString classStr;
+  aFrame->GetContent()->GetAttr(kNameSpaceID_None, nsGkAtoms::_class, classStr);
+  return !classStr.IsEmpty() && classStr.Find("tab-bottom") != kNotFound;
+}
+
+bool
+nsNativeTheme::IsFirstTab(nsIFrame* aFrame)
+{
+  if (!aFrame)
+    return false;
+
+  for (nsIFrame* first : aFrame->GetParent()->PrincipalChildList()) {
+    if (first->GetRect().width > 0 &&
+        first->GetContent()->IsXULElement(nsGkAtoms::tab))
+      return (first == aFrame);
+  }
+  return false;
+}
+
+bool
+nsNativeTheme::IsHorizontal(nsIFrame* aFrame)
+{
+  if (!aFrame)
+    return false;
+    
+  return !aFrame->GetContent()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::orient,
+                                            nsGkAtoms::vertical, 
+                                            eCaseMatters);
+}
+
+bool
+nsNativeTheme::IsNextToSelectedTab(nsIFrame* aFrame, int32_t aOffset)
+{
+  if (!aFrame)
+    return false;
+
+  if (aOffset == 0)
+    return IsSelectedTab(aFrame);
+
+  int32_t thisTabIndex = -1, selectedTabIndex = -1;
+
+  nsIFrame* currentTab = aFrame->GetParent()->PrincipalChildList().FirstChild();
+  for (int32_t i = 0; currentTab; currentTab = currentTab->GetNextSibling()) {
+    if (currentTab->GetRect().width == 0)
+      continue;
+    if (aFrame == currentTab)
+      thisTabIndex = i;
+    if (IsSelectedTab(currentTab))
+      selectedTabIndex = i;
+    ++i;
+  }
+
+  if (thisTabIndex == -1 || selectedTabIndex == -1)
+    return false;
+
+  return (thisTabIndex - selectedTabIndex == aOffset);
+}
+
+// progressbar:
+bool
+nsNativeTheme::IsIndeterminateProgress(nsIFrame* aFrame,
+                                       EventStates aEventStates)
+{
+  if (!aFrame || !aFrame->GetContent())
+    return false;
+
+  if (aFrame->GetContent()->IsHTMLElement(nsGkAtoms::progress)) {
+    return aEventStates.HasState(NS_EVENT_STATE_INDETERMINATE);
+  }
+
+  return aFrame->GetContent()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::mode,
+                                           NS_LITERAL_STRING("undetermined"),
+                                           eCaseMatters);
+}
+
+bool
+nsNativeTheme::IsVerticalProgress(nsIFrame* aFrame)
+{
+  if (!aFrame) {
+    return false;
+  }
+  return IsVerticalMeter(aFrame);
+}
+
+bool
+nsNativeTheme::IsVerticalMeter(nsIFrame* aFrame)
+{
+  NS_PRECONDITION(aFrame, "You have to pass a non-null aFrame");
+  switch (aFrame->StyleDisplay()->mOrient) {
+    case StyleOrient::Horizontal:
+      return false;
+    case StyleOrient::Vertical:
+      return true;
+    case StyleOrient::Inline:
+      return aFrame->GetWritingMode().IsVertical();
+    case StyleOrient::Block:
+      return !aFrame->GetWritingMode().IsVertical();
+  }
+  NS_NOTREACHED("unexpected -moz-orient value");
+  return false;
+}
+
+// menupopup:
+bool
+nsNativeTheme::IsSubmenu(nsIFrame* aFrame, bool* aLeftOfParent)
+{
+  if (!aFrame)
+    return false;
+
+  nsIContent* parentContent = aFrame->GetContent()->GetParent();
+  if (!parentContent || !parentContent->IsXULElement(nsGkAtoms::menu))
+    return false;
+
+  nsIFrame* parent = aFrame;
+  while ((parent = parent->GetParent())) {
+    if (parent->GetContent() == parentContent) {
+      if (aLeftOfParent) {
+        LayoutDeviceIntRect selfBounds, parentBounds;
+        selfBounds = aFrame->GetNearestWidget()->GetScreenBounds();
+        parentBounds = parent->GetNearestWidget()->GetScreenBounds();
+        *aLeftOfParent = selfBounds.x < parentBounds.x;
+      }
+      return true;
+    }
+  }
+
+  return false;
+}
+
+bool
+nsNativeTheme::IsRegularMenuItem(nsIFrame *aFrame)
+{
+  nsMenuFrame *menuFrame = do_QueryFrame(aFrame);
+  return !(menuFrame && (menuFrame->IsOnMenuBar() ||
+                         menuFrame->GetParentMenuListType() != eNotMenuList));
+}
+
+bool
+nsNativeTheme::IsMenuListEditable(nsIFrame *aFrame)
+{
+  bool isEditable = false;
+  nsCOMPtr<nsIDOMXULMenuListElement> menulist = do_QueryInterface(aFrame->GetContent());
+  if (menulist)
+    menulist->GetEditable(&isEditable);
+  return isEditable;
+}
+
+bool
+nsNativeTheme::QueueAnimatedContentForRefresh(nsIContent* aContent,
+                                              uint32_t aMinimumFrameRate)
+{
+  NS_ASSERTION(aContent, "Null pointer!");
+  NS_ASSERTION(aMinimumFrameRate, "aMinimumFrameRate must be non-zero!");
+  NS_ASSERTION(aMinimumFrameRate <= 1000,
+               "aMinimumFrameRate must be less than 1000!");
+
+  uint32_t timeout = 1000 / aMinimumFrameRate;
+  timeout = std::min(mAnimatedContentTimeout, timeout);
+
+  if (!mAnimatedContentTimer) {
+    mAnimatedContentTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
+    NS_ENSURE_TRUE(mAnimatedContentTimer, false);
+  }
+
+  if (mAnimatedContentList.IsEmpty() || timeout != mAnimatedContentTimeout) {
+    nsresult rv;
+    if (!mAnimatedContentList.IsEmpty()) {
+      rv = mAnimatedContentTimer->Cancel();
+      NS_ENSURE_SUCCESS(rv, false);
+    }
+
+    rv = mAnimatedContentTimer->InitWithCallback(this, timeout,
+                                                 nsITimer::TYPE_ONE_SHOT);
+    NS_ENSURE_SUCCESS(rv, false);
+
+    mAnimatedContentTimeout = timeout;
+  }
+
+  if (!mAnimatedContentList.AppendElement(aContent)) {
+    NS_WARNING("Out of memory!");
+    return false;
+  }
+
+  return true;
+}
+
+NS_IMETHODIMP
+nsNativeTheme::Notify(nsITimer* aTimer)
+{
+  NS_ASSERTION(aTimer == mAnimatedContentTimer, "Wrong timer!");
+
+  // XXX Assumes that calling nsIFrame::Invalidate won't reenter
+  //     QueueAnimatedContentForRefresh.
+
+  uint32_t count = mAnimatedContentList.Length();
+  for (uint32_t index = 0; index < count; index++) {
+    nsIFrame* frame = mAnimatedContentList[index]->GetPrimaryFrame();
+    if (frame) {
+      frame->InvalidateFrame();
+    }
+  }
+
+  mAnimatedContentList.Clear();
+  mAnimatedContentTimeout = UINT32_MAX;
+  return NS_OK;
+}
+
+nsIFrame*
+nsNativeTheme::GetAdjacentSiblingFrameWithSameAppearance(nsIFrame* aFrame,
+                                                         bool aNextSibling)
+{
+  if (!aFrame)
+    return nullptr;
+
+  // Find the next visible sibling.
+  nsIFrame* sibling = aFrame;
+  do {
+    sibling = aNextSibling ? sibling->GetNextSibling() : sibling->GetPrevSibling();
+  } while (sibling && sibling->GetRect().width == 0);
+
+  // Check same appearance and adjacency.
+  if (!sibling ||
+      sibling->StyleDisplay()->mAppearance != aFrame->StyleDisplay()->mAppearance ||
+      (sibling->GetRect().XMost() != aFrame->GetRect().x &&
+       aFrame->GetRect().XMost() != sibling->GetRect().x))
+    return nullptr;
+  return sibling;
+}
+
+bool
+nsNativeTheme::IsRangeHorizontal(nsIFrame* aFrame)
+{
+  nsIFrame* rangeFrame = aFrame;
+  if (rangeFrame->GetType() != nsGkAtoms::rangeFrame) {
+    // If the thumb's frame is passed in, get its range parent:
+    rangeFrame = aFrame->GetParent();
+  }
+  if (rangeFrame->GetType() == nsGkAtoms::rangeFrame) {
+    return static_cast<nsRangeFrame*>(rangeFrame)->IsHorizontal();
+  }
+  // Not actually a range frame - just use the ratio of the frame's size to
+  // decide:
+  return aFrame->GetSize().width >= aFrame->GetSize().height;
+}
+
+static nsIFrame*
+GetBodyFrame(nsIFrame* aCanvasFrame)
+{
+  nsIContent* content = aCanvasFrame->GetContent();
+  if (!content) {
+    return nullptr;
+  }
+  nsIDocument* document = content->OwnerDoc();
+  nsIContent* body = document->GetBodyElement();
+  if (!body) {
+    return nullptr;
+  }
+  return body->GetPrimaryFrame();
+}
+
+bool
+nsNativeTheme::IsDarkBackground(nsIFrame* aFrame)
+{
+  nsIScrollableFrame* scrollFrame = nullptr;
+  while (!scrollFrame && aFrame) {
+    scrollFrame = aFrame->GetScrollTargetFrame();
+    aFrame = aFrame->GetParent();
+  }
+  if (!scrollFrame)
+    return false;
+
+  nsIFrame* frame = scrollFrame->GetScrolledFrame();
+  if (nsCSSRendering::IsCanvasFrame(frame)) {
+    // For canvas frames, prefer to look at the body first, because the body
+    // background color is most likely what will be visible as the background
+    // color of the page, even if the html element has a different background
+    // color which prevents that of the body frame to propagate to the viewport.
+    nsIFrame* bodyFrame = GetBodyFrame(frame);
+    if (bodyFrame) {
+      frame = bodyFrame;
+    }
+  }
+  nsStyleContext* bgSC = nullptr;
+  if (!nsCSSRendering::FindBackground(frame, &bgSC) ||
+      bgSC->StyleBackground()->IsTransparent()) {
+    nsIFrame* backgroundFrame = nsCSSRendering::FindNonTransparentBackgroundFrame(frame, true);
+    nsCSSRendering::FindBackground(backgroundFrame, &bgSC);
+  }
+  if (bgSC) {
+    nscolor bgColor = bgSC->StyleBackground()->mBackgroundColor;
+    // Consider the background color dark if the sum of the r, g and b values is
+    // less than 384 in a semi-transparent document.  This heuristic matches what
+    // WebKit does, and we can improve it later if needed.
+    return NS_GET_A(bgColor) > 127 &&
+           NS_GET_R(bgColor) + NS_GET_G(bgColor) + NS_GET_B(bgColor) < 384;
+  }
+  return false;
+}