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/* -*- 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 */
// This defines a common base class for nsITheme implementations, to reduce
// code duplication.
#include "nsAlgorithm.h"
#include "nsAtom.h"
#include "nsColor.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsMargin.h"
#include "nsGkAtoms.h"
#include "nsTArray.h"
#include "nsINamed.h"
#include "nsITimer.h"
#include "nsIContent.h"
#include "mozilla/dom/RustTypes.h"
class nsIFrame;
class nsPresContext;
namespace mozilla {
class ComputedStyle;
enum class StyleAppearance : uint8_t;
} // namespace mozilla
class nsNativeTheme : public nsITimerCallback, public nsINamed {
virtual ~nsNativeTheme() = default;
enum ScrollbarButtonType {
eScrollbarButton_UpTop = 0,
eScrollbarButton_Down = 1 << 0,
eScrollbarButton_Bottom = 1 << 1
enum TreeSortDirection {
// Returns the content state (hover, focus, etc), see EventStateManager.h
static mozilla::dom::ElementState GetContentState(
nsIFrame* aFrame, mozilla::StyleAppearance aAppearance);
// Returns whether the widget is already styled by content
// Normally called from ThemeSupportsWidget to turn off native theming
// for elements that are already styled.
bool IsWidgetStyled(nsPresContext* aPresContext, nsIFrame* aFrame,
mozilla::StyleAppearance aAppearance);
// RTL chrome direction
static bool IsFrameRTL(nsIFrame* aFrame);
static bool IsHTMLContent(nsIFrame* aFrame);
// button:
bool IsDefaultButton(nsIFrame* aFrame) {
return CheckBooleanAttr(aFrame, nsGkAtoms::_default);
bool IsButtonTypeMenu(nsIFrame* aFrame);
// tab:
bool IsSelectedTab(nsIFrame* aFrame) {
return CheckBooleanAttr(aFrame, nsGkAtoms::visuallyselected);
bool IsNextToSelectedTab(nsIFrame* aFrame, int32_t aOffset);
bool IsBeforeSelectedTab(nsIFrame* aFrame) {
return IsNextToSelectedTab(aFrame, -1);
bool IsAfterSelectedTab(nsIFrame* aFrame) {
return IsNextToSelectedTab(aFrame, 1);
bool IsLeftToSelectedTab(nsIFrame* aFrame) {
return IsFrameRTL(aFrame) ? IsAfterSelectedTab(aFrame)
: IsBeforeSelectedTab(aFrame);
bool IsRightToSelectedTab(nsIFrame* aFrame) {
return IsFrameRTL(aFrame) ? IsBeforeSelectedTab(aFrame)
: IsAfterSelectedTab(aFrame);
// button / toolbarbutton:
bool IsCheckedButton(nsIFrame* aFrame) {
return CheckBooleanAttr(aFrame, nsGkAtoms::checked);
bool IsSelectedButton(nsIFrame* aFrame) {
return CheckBooleanAttr(aFrame, nsGkAtoms::checked) ||
CheckBooleanAttr(aFrame, nsGkAtoms::selected);
bool IsOpenButton(nsIFrame* aFrame) {
return CheckBooleanAttr(aFrame, nsGkAtoms::open);
bool IsPressedButton(nsIFrame* aFrame);
// treeheadercell:
TreeSortDirection GetTreeSortDirection(nsIFrame* aFrame);
bool IsLastTreeHeaderCell(nsIFrame* aFrame);
// tab:
bool IsBottomTab(nsIFrame* aFrame);
bool IsFirstTab(nsIFrame* aFrame);
bool IsHorizontal(nsIFrame* aFrame);
// progressbar:
bool IsVerticalProgress(nsIFrame* aFrame);
// meter:
bool IsVerticalMeter(nsIFrame* aFrame);
// textfield:
bool IsReadOnly(nsIFrame* aFrame) {
return CheckBooleanAttr(aFrame, nsGkAtoms::readonly);
// menupopup:
bool IsSubmenu(nsIFrame* aFrame, bool* aLeftOfParent);
static bool CheckBooleanAttr(nsIFrame* aFrame, nsAtom* aAtom);
static int32_t CheckIntAttr(nsIFrame* aFrame, nsAtom* aAtom,
int32_t defaultValue);
// Helpers for progressbar.
static double GetProgressValue(nsIFrame* aFrame);
static double GetProgressMaxValue(nsIFrame* aFrame);
bool QueueAnimatedContentForRefresh(nsIContent* aContent,
uint32_t aMinimumFrameRate);
nsIFrame* GetAdjacentSiblingFrameWithSameAppearance(nsIFrame* aFrame,
bool aNextSibling);
bool IsRangeHorizontal(nsIFrame* aFrame);
static bool IsDarkBackgroundForScrollbar(nsIFrame*);
static bool IsDarkBackground(nsIFrame*);
static bool IsWidgetScrollbarPart(mozilla::StyleAppearance);
static bool IsWidgetAlwaysNonNative(nsIFrame*, mozilla::StyleAppearance);
uint32_t mAnimatedContentTimeout;
nsCOMPtr<nsITimer> mAnimatedContentTimer;
AutoTArray<nsCOMPtr<nsIContent>, 20> mAnimatedContentList;