Add m-esr52 at 52.6.0

1 files changed, 241 insertions, 0 deletions

diff --git a/layout/generic/nsCanvasFrame.h b/layout/generic/nsCanvasFrame.h
new file mode 100644
index 0000000000..236ffb9c7a
--- /dev/null
+++ b/layout/generic/nsCanvasFrame.h
@@ -0,0 +1,241 @@
+/* -*- 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/. */
+
+/* rendering object that goes directly inside the document's scrollbars */
+
+#ifndef nsCanvasFrame_h___
+#define nsCanvasFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "mozilla/EventForwards.h"
+#include "nsContainerFrame.h"
+#include "nsIScrollPositionListener.h"
+#include "nsDisplayList.h"
+#include "nsIAnonymousContentCreator.h"
+
+class nsPresContext;
+class nsRenderingContext;
+
+/**
+ * Root frame class.
+ *
+ * The root frame is the parent frame for the document element's frame.
+ * It only supports having a single child frame which must be an area
+ * frame.
+ * @note nsCanvasFrame keeps overflow container continuations of its child
+ * frame in the main child list.
+ */
+class nsCanvasFrame final : public nsContainerFrame,
+                            public nsIScrollPositionListener,
+                            public nsIAnonymousContentCreator
+{
+public:
+  explicit nsCanvasFrame(nsStyleContext* aContext)
+  : nsContainerFrame(aContext),
+    mDoPaintFocus(false),
+    mAddedScrollPositionListener(false) {}
+
+  NS_DECL_QUERYFRAME_TARGET(nsCanvasFrame)
+  NS_DECL_QUERYFRAME
+  NS_DECL_FRAMEARENA_HELPERS
+
+
+  virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
+
+  virtual mozilla::WritingMode GetWritingMode() const override
+  {
+    nsIContent* rootElem = GetContent();
+    if (rootElem) {
+      nsIFrame* rootElemFrame = rootElem->GetPrimaryFrame();
+      if (rootElemFrame) {
+        return rootElemFrame->GetWritingMode();
+      }
+    }
+    return nsIFrame::GetWritingMode();
+  }
+
+#ifdef DEBUG
+  virtual void SetInitialChildList(ChildListID     aListID,
+                                   nsFrameList&    aChildList) override;
+  virtual void AppendFrames(ChildListID     aListID,
+                            nsFrameList&    aFrameList) override;
+  virtual void InsertFrames(ChildListID     aListID,
+                            nsIFrame*       aPrevFrame,
+                            nsFrameList&    aFrameList) override;
+  virtual void RemoveFrame(ChildListID     aListID,
+                           nsIFrame*       aOldFrame) override;
+#endif
+
+  virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) override;
+  virtual nscoord GetPrefISize(nsRenderingContext *aRenderingContext) override;
+  virtual void Reflow(nsPresContext*           aPresContext,
+                      ReflowOutput&     aDesiredSize,
+                      const ReflowInput& aReflowInput,
+                      nsReflowStatus&          aStatus) override;
+  virtual bool IsFrameOfType(uint32_t aFlags) const override
+  {
+    return nsContainerFrame::IsFrameOfType(aFlags &
+             ~(nsIFrame::eCanContainOverflowContainers));
+  }
+
+  // nsIAnonymousContentCreator
+  virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override;
+  virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements, uint32_t aFilter) override;
+
+  mozilla::dom::Element* GetCustomContentContainer() const
+  {
+    return mCustomContentContainer;
+  }
+
+  /**
+   * Unhide the CustomContentContainer. This call only has an effect if
+   * mCustomContentContainer is non-null.
+   */
+  void ShowCustomContentContainer();
+
+  /**
+   * Hide the CustomContentContainer. This call only has an effect if
+   * mCustomContentContainer is non-null.
+   */
+  void HideCustomContentContainer();
+
+  /** SetHasFocus tells the CanvasFrame to draw with focus ring
+   *  @param aHasFocus true to show focus ring, false to hide it
+   */
+  NS_IMETHOD SetHasFocus(bool aHasFocus);
+
+  virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
+                                const nsRect&           aDirtyRect,
+                                const nsDisplayListSet& aLists) override;
+
+  void PaintFocus(mozilla::gfx::DrawTarget* aRenderingContext, nsPoint aPt);
+
+  // nsIScrollPositionListener
+  virtual void ScrollPositionWillChange(nscoord aX, nscoord aY) override;
+  virtual void ScrollPositionDidChange(nscoord aX, nscoord aY) override {}
+
+  /**
+   * Get the "type" of the frame
+   *
+   * @see nsGkAtoms::canvasFrame
+   */
+  virtual nsIAtom* GetType() const override;
+
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const override;
+#endif
+  virtual nsresult GetContentForEvent(mozilla::WidgetEvent* aEvent,
+                                      nsIContent** aContent) override;
+
+  nsRect CanvasArea() const;
+
+protected:
+  // Data members
+  bool                      mDoPaintFocus;
+  bool                      mAddedScrollPositionListener;
+
+  nsCOMPtr<mozilla::dom::Element> mCustomContentContainer;
+};
+
+/**
+ * Override nsDisplayBackground methods so that we pass aBGClipRect to
+ * PaintBackground, covering the whole overflow area.
+ * We can also paint an "extra background color" behind the normal
+ * background.
+ */
+class nsDisplayCanvasBackgroundColor : public nsDisplaySolidColorBase {
+public:
+  nsDisplayCanvasBackgroundColor(nsDisplayListBuilder* aBuilder, nsIFrame *aFrame)
+    : nsDisplaySolidColorBase(aBuilder, aFrame, NS_RGBA(0,0,0,0))
+  {
+  }
+
+  virtual bool ComputeVisibility(nsDisplayListBuilder* aBuilder,
+                                 nsRegion* aVisibleRegion) override
+  {
+    return NS_GET_A(mColor) > 0;
+  }
+  virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) override
+  {
+    nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
+    *aSnap = true;
+    return frame->CanvasArea() + ToReferenceFrame();
+  }
+  virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
+                       HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames) override
+  {
+    // We need to override so we don't consider border-radius.
+    aOutFrames->AppendElement(mFrame);
+  }
+
+  virtual void Paint(nsDisplayListBuilder* aBuilder,
+                     nsRenderingContext* aCtx) override;
+
+  void SetExtraBackgroundColor(nscolor aColor)
+  {
+    mColor = aColor;
+  }
+
+  NS_DISPLAY_DECL_NAME("CanvasBackgroundColor", TYPE_CANVAS_BACKGROUND_COLOR)
+#ifdef MOZ_DUMP_PAINTING
+  virtual void WriteDebugInfo(std::stringstream& aStream) override;
+#endif
+};
+
+class nsDisplayCanvasBackgroundImage : public nsDisplayBackgroundImage {
+public:
+  nsDisplayCanvasBackgroundImage(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
+                                 uint32_t aLayer, const nsStyleBackground* aBg)
+    : nsDisplayBackgroundImage(aBuilder, aFrame, aLayer,
+                               aFrame->GetRectRelativeToSelf() + aBuilder->ToReferenceFrame(aFrame),
+                               aBg)
+  {
+    if (ShouldFixToViewport(aBuilder)) {
+      mAnimatedGeometryRoot = aBuilder->FindAnimatedGeometryRootFor(this);
+    }
+  }
+
+  virtual void Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) override;
+
+  virtual void NotifyRenderingChanged() override
+  {
+    mFrame->Properties().Delete(nsIFrame::CachedBackgroundImageDT());
+  }
+
+  virtual bool ShouldFixToViewport(nsDisplayListBuilder* aBuilder) override
+  {
+    // Put background-attachment:fixed canvas background images in their own
+    // compositing layer. Since we know their background painting area can't
+    // change (unless the viewport size itself changes), async scrolling
+    // will work well.
+    return ShouldTreatAsFixed() &&
+           !mBackgroundStyle->mImage.mLayers[mLayer].mImage.IsEmpty();
+  }
+ 
+  // We still need to paint a background color as well as an image for this item, 
+  // so we can't support this yet.
+  virtual bool SupportsOptimizingToImage() override { return false; }
+
+ bool IsSingleFixedPositionImage(nsDisplayListBuilder* aBuilder,
+                                  const nsRect& aClipRect,
+                                  gfxRect* aDestRect);
+  
+  
+  NS_DISPLAY_DECL_NAME("CanvasBackgroundImage", TYPE_CANVAS_BACKGROUND_IMAGE)
+};
+
+class nsDisplayCanvasThemedBackground : public nsDisplayThemedBackground {
+public:
+  nsDisplayCanvasThemedBackground(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
+    : nsDisplayThemedBackground(aBuilder, aFrame,
+                                aFrame->GetRectRelativeToSelf() + aBuilder->ToReferenceFrame(aFrame))
+  {}
+
+  virtual void Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) override;
+
+  NS_DISPLAY_DECL_NAME("CanvasThemedBackground", TYPE_CANVAS_THEMED_BACKGROUND)
+};
+
+#endif /* nsCanvasFrame_h___ */