Add m-esr52 at 52.6.0

1 files changed, 217 insertions, 0 deletions

diff --git a/layout/xul/nsListBoxBodyFrame.h b/layout/xul/nsListBoxBodyFrame.h
new file mode 100644
index 000000000..57bbf0257
--- /dev/null
+++ b/layout/xul/nsListBoxBodyFrame.h
@@ -0,0 +1,217 @@
+/* -*- 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/. */
+
+#ifndef nsListBoxBodyFrame_h
+#define nsListBoxBodyFrame_h
+
+#include "mozilla/Attributes.h"
+#include "nsCOMPtr.h"
+#include "nsBoxFrame.h"
+#include "nsIScrollbarMediator.h"
+#include "nsIReflowCallback.h"
+#include "nsBoxLayoutState.h"
+#include "nsThreadUtils.h"
+#include "nsPIBoxObject.h"
+
+class nsPresContext;
+class nsListScrollSmoother;
+nsIFrame* NS_NewListBoxBodyFrame(nsIPresShell* aPresShell,
+                                 nsStyleContext* aContext);
+
+class nsListBoxBodyFrame final : public nsBoxFrame,
+                                 public nsIScrollbarMediator,
+                                 public nsIReflowCallback
+{
+  nsListBoxBodyFrame(nsStyleContext* aContext,
+                     nsBoxLayout* aLayoutManager);
+  virtual ~nsListBoxBodyFrame();
+
+public:
+  NS_DECL_QUERYFRAME_TARGET(nsListBoxBodyFrame)
+  NS_DECL_QUERYFRAME
+  NS_DECL_FRAMEARENA_HELPERS
+
+  // non-virtual ListBoxObject
+  int32_t GetNumberOfVisibleRows();
+  int32_t GetIndexOfFirstVisibleRow();
+  nsresult EnsureIndexIsVisible(int32_t aRowIndex);
+  nsresult ScrollToIndex(int32_t aRowIndex);
+  nsresult ScrollByLines(int32_t aNumLines);
+  nsresult GetItemAtIndex(int32_t aIndex, nsIDOMElement **aResult);
+  nsresult GetIndexOfItem(nsIDOMElement *aItem, int32_t *aResult);
+
+  friend nsIFrame* NS_NewListBoxBodyFrame(nsIPresShell* aPresShell,
+                                          nsStyleContext* aContext);
+  
+  // nsIFrame
+  virtual void Init(nsIContent*       aContent,
+                    nsContainerFrame* aParent, 
+                    nsIFrame*         aPrevInFlow) override;
+  virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
+
+  virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsIAtom* aAttribute, int32_t aModType) override;
+
+  // nsIScrollbarMediator
+  virtual void ScrollByPage(nsScrollbarFrame* aScrollbar, int32_t aDirection,
+                            nsIScrollbarMediator::ScrollSnapMode snapMode
+                              = nsIScrollbarMediator::DISABLE_SNAP) override;
+  virtual void ScrollByWhole(nsScrollbarFrame* aScrollbar, int32_t aDirection,
+                             nsIScrollbarMediator::ScrollSnapMode snapMode
+                               = nsIScrollbarMediator::DISABLE_SNAP) override;
+  virtual void ScrollByLine(nsScrollbarFrame* aScrollbar, int32_t aDirection,
+                            nsIScrollbarMediator::ScrollSnapMode snapMode
+                              = nsIScrollbarMediator::DISABLE_SNAP) override;
+  virtual void RepeatButtonScroll(nsScrollbarFrame* aScrollbar) override;
+  virtual void ThumbMoved(nsScrollbarFrame* aScrollbar,
+                          int32_t aOldPos,
+                          int32_t aNewPos) override;
+  virtual void ScrollbarReleased(nsScrollbarFrame* aScrollbar) override {}
+  virtual void VisibilityChanged(bool aVisible) override;
+  virtual nsIFrame* GetScrollbarBox(bool aVertical) override;
+  virtual void ScrollbarActivityStarted() const override {}
+  virtual void ScrollbarActivityStopped() const override {}
+  virtual bool IsScrollbarOnRight() const override {
+    return (StyleVisibility()->mDirection == NS_STYLE_DIRECTION_LTR);
+  }
+  virtual bool ShouldSuppressScrollbarRepaints() const override {
+    return false;
+  }
+
+
+  // nsIReflowCallback
+  virtual bool ReflowFinished() override;
+  virtual void ReflowCallbackCanceled() override;
+
+  NS_IMETHOD DoXULLayout(nsBoxLayoutState& aBoxLayoutState) override;
+  virtual void MarkIntrinsicISizesDirty() override;
+
+  virtual nsSize GetXULMinSizeForScrollArea(nsBoxLayoutState& aBoxLayoutState) override;
+  virtual nsSize GetXULPrefSize(nsBoxLayoutState& aBoxLayoutState) override;
+
+  // size calculation 
+  int32_t GetRowCount();
+  int32_t GetRowHeightAppUnits() { return mRowHeight; }
+  int32_t GetFixedRowSize();
+  void SetRowHeight(nscoord aRowHeight);
+  nscoord GetYPosition();
+  nscoord GetAvailableHeight();
+  nscoord ComputeIntrinsicISize(nsBoxLayoutState& aBoxLayoutState);
+
+  // scrolling
+  nsresult InternalPositionChangedCallback();
+  nsresult InternalPositionChanged(bool aUp, int32_t aDelta);
+  // Process pending position changed events, then do the position change.
+  // This can wipe out the frametree.
+  nsresult DoInternalPositionChangedSync(bool aUp, int32_t aDelta);
+  // Actually do the internal position change.  This can wipe out the frametree
+  nsresult DoInternalPositionChanged(bool aUp, int32_t aDelta);
+  nsListScrollSmoother* GetSmoother();
+  void VerticalScroll(int32_t aDelta);
+  // Update the scroll index given a position, in CSS pixels
+  void UpdateIndex(int32_t aNewPos);
+
+  // frames
+  nsIFrame* GetFirstFrame();
+  nsIFrame* GetLastFrame();
+
+  // lazy row creation and destruction
+  void CreateRows();
+  void DestroyRows(int32_t& aRowsToLose);
+  void ReverseDestroyRows(int32_t& aRowsToLose);
+  nsIFrame* GetFirstItemBox(int32_t aOffset, bool* aCreated);
+  nsIFrame* GetNextItemBox(nsIFrame* aBox, int32_t aOffset, bool* aCreated);
+  bool ContinueReflow(nscoord height);
+  NS_IMETHOD ListBoxAppendFrames(nsFrameList& aFrameList);
+  NS_IMETHOD ListBoxInsertFrames(nsIFrame* aPrevFrame, nsFrameList& aFrameList);
+  void OnContentInserted(nsIContent* aContent);
+  void OnContentRemoved(nsPresContext* aPresContext,  nsIContent* aContainer,
+                        nsIFrame* aChildFrame, nsIContent* aOldNextSibling);
+
+  void GetListItemContentAt(int32_t aIndex, nsIContent** aContent);
+  void GetListItemNextSibling(nsIContent* aListItem, nsIContent** aContent, int32_t& aSiblingIndex);
+
+  void PostReflowCallback();
+
+  bool SetBoxObject(nsPIBoxObject* aBoxObject)
+  {
+    NS_ENSURE_TRUE(!mBoxObject, false);
+    mBoxObject = aBoxObject;
+    return true;
+  }
+
+  virtual bool SupportsOrdinalsInChildren() override;
+
+  virtual bool ComputesOwnOverflowArea() override { return true; }
+
+protected:
+  class nsPositionChangedEvent;
+  friend class nsPositionChangedEvent;
+
+  class nsPositionChangedEvent : public mozilla::Runnable
+  {
+  public:
+    nsPositionChangedEvent(nsListBoxBodyFrame* aFrame,
+                           bool aUp, int32_t aDelta) :
+      mFrame(aFrame), mUp(aUp), mDelta(aDelta)
+    {}
+  
+    NS_IMETHOD Run() override
+    {
+      if (!mFrame) {
+        return NS_OK;
+      }
+
+      mFrame->mPendingPositionChangeEvents.RemoveElement(this);
+
+      return mFrame->DoInternalPositionChanged(mUp, mDelta);
+    }
+
+    void Revoke() {
+      mFrame = nullptr;
+    }
+
+    nsListBoxBodyFrame* mFrame;
+    bool mUp;
+    int32_t mDelta;
+  };
+
+  void ComputeTotalRowCount();
+  int32_t ToRowIndex(nscoord aPos) const;
+  void RemoveChildFrame(nsBoxLayoutState &aState, nsIFrame *aChild);
+
+  nsTArray< RefPtr<nsPositionChangedEvent> > mPendingPositionChangeEvents;
+  nsCOMPtr<nsPIBoxObject> mBoxObject;
+
+  // frame markers
+  nsWeakFrame mTopFrame;
+  nsIFrame* mBottomFrame;
+  nsIFrame* mLinkupFrame;
+
+  nsListScrollSmoother* mScrollSmoother;
+
+  int32_t mRowsToPrepend;
+
+  // row height
+  int32_t mRowCount;
+  nscoord mRowHeight;
+  nscoord mAvailableHeight;
+  nscoord mStringWidth;
+
+  // scrolling
+  int32_t mCurrentIndex; // Row-based
+  int32_t mOldIndex; 
+  int32_t mYPosition;
+  int32_t mTimePerRow;
+
+  // row height
+  bool mRowHeightWasSet;
+  // scrolling
+  bool mScrolling;
+  bool mAdjustScroll;
+
+  bool mReflowCallbackPosted;
+};
+
+#endif // nsListBoxBodyFrame_h