Add m-esr52 at 52.6.0

1 files changed, 154 insertions, 0 deletions

diff --git a/layout/svg/nsISVGChildFrame.h b/layout/svg/nsISVGChildFrame.h
new file mode 100644
index 000000000..c9fd0f12a
--- /dev/null
+++ b/layout/svg/nsISVGChildFrame.h
@@ -0,0 +1,154 @@
+/* -*- 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 __NS_ISVGCHILDFRAME_H__
+#define __NS_ISVGCHILDFRAME_H__
+
+#include "gfxRect.h"
+#include "nsQueryFrame.h"
+
+class gfxContext;
+class gfxMatrix;
+class nsIFrame;
+class SVGBBox;
+
+struct nsRect;
+
+namespace mozilla {
+class SVGAnimatedLengthList;
+class SVGAnimatedNumberList;
+class SVGLengthList;
+class SVGNumberList;
+class SVGUserUnitList;
+
+namespace gfx {
+class Matrix;
+} // namespace gfx
+} // namespace mozilla
+
+/**
+ * This class is not particularly well named. It is inherited by some, but
+ * not all SVG frame classes that can be descendants of an
+ * nsSVGOuterSVGFrame in the frame tree. Note specifically that SVG container
+ * frames that do not inherit nsSVGDisplayContainerFrame do not inherit this
+ * class (so that's classes that only inherit nsSVGContainerFrame).
+ */
+class nsISVGChildFrame : public nsQueryFrame
+{
+public:
+  typedef mozilla::SVGAnimatedNumberList SVGAnimatedNumberList;
+  typedef mozilla::SVGNumberList SVGNumberList;
+  typedef mozilla::SVGAnimatedLengthList SVGAnimatedLengthList;
+  typedef mozilla::SVGLengthList SVGLengthList;
+  typedef mozilla::SVGUserUnitList SVGUserUnitList;
+  typedef mozilla::image::DrawResult DrawResult;
+
+  NS_DECL_QUERYFRAME_TARGET(nsISVGChildFrame)
+
+  /**
+   * Paint this frame.
+   *
+   * SVG is painted using a combination of display lists (trees of
+   * nsDisplayItem built by BuildDisplayList() implementations) and recursive
+   * PaintSVG calls.  SVG frames with the NS_FRAME_IS_NONDISPLAY bit set are
+   * always painted using recursive PaintSVG calls since display list painting
+   * would provide no advantages (they wouldn't be retained for invalidation).
+   * Displayed SVG is normally painted via a display list tree created under
+   * nsSVGOuterSVGFrame::BuildDisplayList, unless the
+   * svg.display-lists.painting.enabled pref has been set to false by the user
+   * in which case it is done via an nsSVGOuterSVGFrame::PaintSVG() call that
+   * recurses over the entire SVG frame tree.  In future we may use PaintSVG()
+   * calls on SVG container frames to avoid display list construction when it
+   * is expensive and unnecessary (see bug 934411).
+   *
+   * @param aTransform The transform that has to be multiplied onto the
+   *   DrawTarget in order for drawing to be in this frame's SVG user space.
+   *   Implementations of this method should avoid multiplying aTransform onto
+   *   the DrawTarget when possible and instead just pass a transform down to
+   *   their children.  This is preferable because changing the transform is
+   *   very expensive for certain DrawTarget backends so it is best to minimize
+   *   the number of transform changes.
+   *
+   * @param aDirtyRect The area being redrawn, in frame offset pixel
+   *   coordinates.
+   */
+  virtual DrawResult PaintSVG(gfxContext& aContext,
+                              const gfxMatrix& aTransform,
+                              const nsIntRect* aDirtyRect = nullptr) = 0;
+
+  /**
+   * Returns the frame that should handle pointer events at aPoint.  aPoint is
+   * expected to be in the SVG user space of the frame on which this method is
+   * called.  The frame returned may be the frame on which this method is
+   * called, any of its descendants or else nullptr.
+   */
+  virtual nsIFrame* GetFrameForPoint(const gfxPoint& aPoint) = 0;
+
+  // Get bounds in our nsSVGOuterSVGFrame's coordinates space (in app units)
+  virtual nsRect GetCoveredRegion()=0;
+
+  // Called on SVG child frames (except NS_FRAME_IS_NONDISPLAY frames)
+  // to update and then invalidate their cached bounds. This method is not
+  // called until after the nsSVGOuterSVGFrame has had its initial reflow
+  // (i.e. once the SVG viewport dimensions are known). It should also only
+  // be called by nsSVGOuterSVGFrame during its reflow.
+  virtual void ReflowSVG()=0;
+
+  // Flags to pass to NotifySVGChange:
+  //
+  // DO_NOT_NOTIFY_RENDERING_OBSERVERS - this should only be used when
+  //                           updating the descendant frames of a clipPath,
+  //                           mask, pattern or marker frame (or other similar
+  //                           NS_FRAME_IS_NONDISPLAY frame) immediately
+  //                           prior to painting that frame's descendants.
+  // TRANSFORM_CHANGED     - the current transform matrix for this frame has changed
+  // COORD_CONTEXT_CHANGED - the dimensions of this frame's coordinate context has
+  //                           changed (percentage lengths must be reevaluated)
+  enum SVGChangedFlags {
+    TRANSFORM_CHANGED     = 0x01,
+    COORD_CONTEXT_CHANGED = 0x02,
+    FULL_ZOOM_CHANGED     = 0x04
+  };
+  /**
+   * This is called on a frame when there has been a change to one of its
+   * ancestors that might affect the frame too. SVGChangedFlags are passed
+   * to indicate what changed.
+   *
+   * Implementations do not need to invalidate, since the caller will 
+   * invalidate the entire area of the ancestor that changed. However, they
+   * may need to update their bounds.
+   */
+  virtual void NotifySVGChanged(uint32_t aFlags)=0;
+
+  /**
+   * Get this frame's contribution to the rect returned by a GetBBox() call
+   * that occurred either on this element, or on one of its ancestors.
+   *
+   * SVG defines an element's bbox to be the element's fill bounds in the
+   * userspace established by that element. By allowing callers to pass in the
+   * transform from the userspace established by this element to the userspace
+   * established by an an ancestor, this method allows callers to obtain this
+   * element's fill bounds in the userspace established by that ancestor
+   * instead. In that case, since we return the bounds in a different userspace
+   * (the ancestor's), the bounds we return are not this element's bbox, but
+   * rather this element's contribution to the bbox of the ancestor.
+   *
+   * @param aToBBoxUserspace The transform from the userspace established by
+   *   this element to the userspace established by the ancestor on which
+   *   getBBox was called. This will be the identity matrix if we are the
+   *   element on which getBBox was called.
+   *
+   * @param aFlags Flags indicating whether, stroke, for example, should be
+   *   included in the bbox calculation.
+   */
+  virtual SVGBBox GetBBoxContribution(const mozilla::gfx::Matrix &aToBBoxUserspace,
+                                      uint32_t aFlags) = 0;
+
+  // Are we a container frame?
+  virtual bool IsDisplayContainer()=0;
+};
+
+#endif // __NS_ISVGCHILDFRAME_H__
+