1 files changed, 199 insertions, 0 deletions
diff --git a/widget/nsNativeTheme.h b/widget/nsNativeTheme.h
new file mode 100644
index 0000000000..b72b30a3e0
--- /dev/null
+++ b/widget/nsNativeTheme.h
@@ -0,0 +1,199 @@
+/* -*- 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/. */
+
+// This defines a common base class for nsITheme implementations, to reduce
+// code duplication.
+
+#ifndef _NSNATIVETHEME_H_
+#define _NSNATIVETHEME_H_
+
+#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"
+
+class nsIFrame;
+class nsPresContext;
+
+namespace mozilla {
+class ComputedStyle;
+enum class StyleAppearance : uint8_t;
+class EventStates;
+}  // namespace mozilla
+
+class nsNativeTheme : public nsITimerCallback, public nsINamed {
+ protected:
+  virtual ~nsNativeTheme() = default;
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSITIMERCALLBACK
+  NS_DECL_NSINAMED
+
+  nsNativeTheme();
+
+ public:
+  enum ScrollbarButtonType {
+    eScrollbarButton_UpTop = 0,
+    eScrollbarButton_Down = 1 << 0,
+    eScrollbarButton_Bottom = 1 << 1
+  };
+
+  enum TreeSortDirection {
+    eTreeSortDirection_Descending,
+    eTreeSortDirection_Natural,
+    eTreeSortDirection_Ascending
+  };
+  // Returns the content state (hover, focus, etc), see EventStateManager.h
+  static mozilla::EventStates 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);
+
+  // Accessors to widget-specific state information
+
+  bool IsDisabled(nsIFrame* aFrame, mozilla::EventStates aEventStates);
+
+  // 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);
+
+  // checkbox:
+  bool IsChecked(nsIFrame* aFrame) {
+    return GetCheckedOrSelected(aFrame, false);
+  }
+
+  // radiobutton:
+  bool IsSelected(nsIFrame* aFrame) {
+    return GetCheckedOrSelected(aFrame, true);
+  }
+
+  static bool IsFocused(nsIFrame* aFrame) {
+    return CheckBooleanAttr(aFrame, nsGkAtoms::focused);
+  }
+
+  // scrollbar button:
+  int32_t GetScrollbarButtonType(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 IsIndeterminateProgress(nsIFrame* aFrame,
+                               mozilla::EventStates aEventStates);
+  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);
+
+  // True if it's not a menubar item or menulist item
+  bool IsRegularMenuItem(nsIFrame* aFrame);
+
+  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 GetCheckedOrSelected(nsIFrame* aFrame, bool aCheckSelected);
+  bool GetIndeterminate(nsIFrame* aFrame);
+
+  bool QueueAnimatedContentForRefresh(nsIContent* aContent,
+                                      uint32_t aMinimumFrameRate);
+
+  nsIFrame* GetAdjacentSiblingFrameWithSameAppearance(nsIFrame* aFrame,
+                                                      bool aNextSibling);
+
+  bool IsRangeHorizontal(nsIFrame* aFrame);
+
+  // scrollbar
+  static bool IsDarkBackground(nsIFrame* aFrame);
+  // custom scrollbar
+  typedef nscolor (*AutoColorGetter)(mozilla::ComputedStyle*);
+  static bool IsWidgetScrollbarPart(mozilla::StyleAppearance aAppearance);
+
+ private:
+  uint32_t mAnimatedContentTimeout;
+  nsCOMPtr<nsITimer> mAnimatedContentTimer;
+  AutoTArray<nsCOMPtr<nsIContent>, 20> mAnimatedContentList;
+};
+
+#endif  // _NSNATIVETHEME_H_