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diff --git a/layout/forms/nsComboboxControlFrame.h b/layout/forms/nsComboboxControlFrame.h
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+/* -*- 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/. */
+
+#ifndef nsComboboxControlFrame_h___
+#define nsComboboxControlFrame_h___
+
+#ifdef DEBUG_evaughan
+// #define DEBUG_rods
+#endif
+
+#ifdef DEBUG_rods
+// #define DO_REFLOW_DEBUG
+// #define DO_REFLOW_COUNTER
+// #define DO_UNCONSTRAINED_CHECK
+// #define DO_PIXELS
+// #define DO_NEW_REFLOW
+#endif
+
+// Mark used to indicate when onchange has been fired for current combobox item
+#define NS_SKIP_NOTIFY_INDEX -2
+
+#include "mozilla/Attributes.h"
+#include "nsBlockFrame.h"
+#include "nsIFormControlFrame.h"
+#include "nsIAnonymousContentCreator.h"
+#include "nsISelectControlFrame.h"
+#include "nsIRollupListener.h"
+#include "nsThreadUtils.h"
+
+class nsComboboxDisplayFrame;
+class nsTextNode;
+
+namespace mozilla {
+class PresShell;
+class HTMLSelectEventListener;
+namespace dom {
+class HTMLSelectElement;
+}
+
+namespace gfx {
+class DrawTarget;
+} // namespace gfx
+} // namespace mozilla
+
+class nsComboboxControlFrame final : public nsBlockFrame,
+ public nsIFormControlFrame,
+ public nsIAnonymousContentCreator,
+ public nsISelectControlFrame {
+ using DrawTarget = mozilla::gfx::DrawTarget;
+ using Element = mozilla::dom::Element;
+
+ public:
+ friend nsComboboxControlFrame* NS_NewComboboxControlFrame(
+ mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
+ friend class nsComboboxDisplayFrame;
+
+ explicit nsComboboxControlFrame(ComputedStyle* aStyle,
+ nsPresContext* aPresContext);
+ ~nsComboboxControlFrame();
+
+ NS_DECL_QUERYFRAME
+ NS_DECL_FRAMEARENA_HELPERS(nsComboboxControlFrame)
+
+ // nsIAnonymousContentCreator
+ nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) final;
+ void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
+ uint32_t aFilter) final;
+
+ nsIContent* GetDisplayNode() const;
+ nsIFrame* CreateFrameForDisplayNode();
+
+#ifdef ACCESSIBILITY
+ mozilla::a11y::AccType AccessibleType() final;
+#endif
+
+ nscoord GetMinISize(gfxContext* aRenderingContext) final;
+
+ nscoord GetPrefISize(gfxContext* aRenderingContext) final;
+
+ void Reflow(nsPresContext* aCX, ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput, nsReflowStatus& aStatus) final;
+
+ MOZ_CAN_RUN_SCRIPT_BOUNDARY
+ nsresult HandleEvent(nsPresContext* aPresContext,
+ mozilla::WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus) final;
+
+ void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+ const nsDisplayListSet& aLists) final;
+
+ void PaintFocus(DrawTarget& aDrawTarget, nsPoint aPt);
+
+ void Init(nsIContent* aContent, nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow) final;
+
+#ifdef DEBUG_FRAME_DUMP
+ nsresult GetFrameName(nsAString& aResult) const final;
+#endif
+ void Destroy(DestroyContext&) final;
+
+ void SetInitialChildList(ChildListID aListID, nsFrameList&& aChildList) final;
+ const nsFrameList& GetChildList(ChildListID aListID) const final;
+ void GetChildLists(nsTArray<ChildList>* aLists) const final;
+
+ nsContainerFrame* GetContentInsertionFrame() final;
+
+ // Return the dropdown and display frame.
+ void AppendDirectlyOwnedAnonBoxes(nsTArray<OwnedAnonBox>& aResult) final;
+
+ // nsIFormControlFrame
+ nsresult SetFormProperty(nsAtom* aName, const nsAString& aValue) final {
+ return NS_OK;
+ }
+
+ /**
+ * Inform the control that it got (or lost) focus.
+ * If it lost focus, the dropdown menu will be rolled up if needed,
+ * and FireOnChange() will be called.
+ * @param aOn true if got focus, false if lost focus.
+ * @param aRepaint if true then force repaint (NOTE: we always force repaint
+ * currently)
+ * @note This method might destroy |this|.
+ */
+ MOZ_CAN_RUN_SCRIPT_BOUNDARY
+ void SetFocus(bool aOn, bool aRepaint) final;
+
+ /**
+ * Return the available space before and after this frame for
+ * placing the drop-down list, and the current 2D translation.
+ * Note that either or both can be less than or equal to zero,
+ * if both are then the drop-down should be closed.
+ */
+ void GetAvailableDropdownSpace(mozilla::WritingMode aWM, nscoord* aBefore,
+ nscoord* aAfter,
+ mozilla::LogicalPoint* aTranslation);
+ int32_t GetIndexOfDisplayArea();
+ /**
+ * @note This method might destroy |this|.
+ */
+ nsresult RedisplaySelectedText();
+ int32_t UpdateRecentIndex(int32_t aIndex);
+
+ bool IsDroppedDown() const;
+
+ // nsISelectControlFrame
+ NS_IMETHOD AddOption(int32_t index) final;
+ NS_IMETHOD RemoveOption(int32_t index) final;
+ NS_IMETHOD DoneAddingChildren(bool aIsDone) final;
+ NS_IMETHOD OnOptionSelected(int32_t aIndex, bool aSelected) final;
+ NS_IMETHOD_(void)
+ OnSetSelectedIndex(int32_t aOldIndex, int32_t aNewIndex) final;
+
+ int32_t CharCountOfLargestOptionForInflation() const;
+
+ protected:
+ friend class RedisplayTextEvent;
+ friend class nsAsyncResize;
+ friend class nsResizeDropdownAtFinalPosition;
+
+ // Return true if we should render a dropdown button.
+ bool HasDropDownButton() const;
+ nscoord DropDownButtonISize();
+
+ enum DropDownPositionState {
+ // can't show the dropdown at its current position
+ eDropDownPositionSuppressed,
+ // a resize reflow is pending, don't show it yet
+ eDropDownPositionPendingResize,
+ // the dropdown has its final size and position and can be displayed here
+ eDropDownPositionFinal
+ };
+ DropDownPositionState AbsolutelyPositionDropDown();
+
+ nscoord GetLongestOptionISize(gfxContext*) const;
+
+ // Helper for GetMinISize/GetPrefISize
+ nscoord GetIntrinsicISize(gfxContext* aRenderingContext,
+ mozilla::IntrinsicISizeType aType);
+
+ class RedisplayTextEvent : public mozilla::Runnable {
+ public:
+ NS_DECL_NSIRUNNABLE
+ explicit RedisplayTextEvent(nsComboboxControlFrame* c)
+ : mozilla::Runnable("nsComboboxControlFrame::RedisplayTextEvent"),
+ mControlFrame(c) {}
+ void Revoke() { mControlFrame = nullptr; }
+
+ private:
+ nsComboboxControlFrame* mControlFrame;
+ };
+
+ void CheckFireOnChange();
+ void FireValueChangeEvent();
+ nsresult RedisplayText();
+ void HandleRedisplayTextEvent();
+ void ActuallyDisplayText(bool aNotify);
+
+ // If our total transform to the root frame of the root document is only a 2d
+ // translation then return that translation, otherwise returns (0,0).
+ nsPoint GetCSSTransformTranslation();
+
+ mozilla::dom::HTMLSelectElement& Select() const;
+ void GetOptionText(uint32_t aIndex, nsAString& aText) const;
+
+ RefPtr<nsTextNode> mDisplayContent; // Anonymous content used to display the
+ // current selection
+ RefPtr<Element> mButtonContent; // Anonymous content for the button
+ nsContainerFrame* mDisplayFrame; // frame to display selection
+ nsIFrame* mButtonFrame; // button frame
+
+ // The inline size of our display area. Used by that frame's reflow
+ // to size to the full inline size except the drop-marker.
+ nscoord mDisplayISize;
+ // The maximum inline size of our display area, which is the
+ // nsComoboxControlFrame's border-box.
+ //
+ // Going over this would be observable via DOM APIs like client / scrollWidth.
+ nscoord mMaxDisplayISize;
+
+ nsRevocableEventPtr<RedisplayTextEvent> mRedisplayTextEvent;
+
+ int32_t mRecentSelectedIndex;
+ int32_t mDisplayedIndex;
+ nsString mDisplayedOptionTextOrPreview;
+
+ RefPtr<mozilla::HTMLSelectEventListener> mEventListener;
+
+ // See comment in HandleRedisplayTextEvent().
+ bool mInRedisplayText;
+ bool mIsOpenInParentProcess;
+
+ // static class data member for Bug 32920
+ // only one control can be focused at a time
+ static nsComboboxControlFrame* sFocused;
+
+#ifdef DO_REFLOW_COUNTER
+ int32_t mReflowId;
+#endif
+};
+
+#endif