1 files changed, 244 insertions, 0 deletions
diff --git a/layout/forms/nsComboboxControlFrame.h b/layout/forms/nsComboboxControlFrame.h
new file mode 100644
index 0000000000..e878c0ebe3
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+++ b/layout/forms/nsComboboxControlFrame.h
@@ -0,0 +1,244 @@
+/* -*- 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