Add m-esr52 at 52.6.0

1 files changed, 181 insertions, 0 deletions

diff --git a/layout/generic/nsRubyTextContainerFrame.cpp b/layout/generic/nsRubyTextContainerFrame.cpp
new file mode 100644
index 000000000..e91f1151f
--- /dev/null
+++ b/layout/generic/nsRubyTextContainerFrame.cpp
@@ -0,0 +1,181 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code is subject to the terms of the Mozilla Public License
+ * version 2.0 (the "License"). You can obtain a copy of the License at
+ * http://mozilla.org/MPL/2.0/. */
+
+/* rendering object for CSS "display: ruby-text-container" */
+
+#include "nsRubyTextContainerFrame.h"
+
+#include "mozilla/UniquePtr.h"
+#include "mozilla/WritingModes.h"
+#include "nsLineLayout.h"
+#include "nsPresContext.h"
+#include "nsStyleContext.h"
+
+using namespace mozilla;
+
+//----------------------------------------------------------------------
+
+// Frame class boilerplate
+// =======================
+
+NS_QUERYFRAME_HEAD(nsRubyTextContainerFrame)
+  NS_QUERYFRAME_ENTRY(nsRubyTextContainerFrame)
+NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
+
+NS_IMPL_FRAMEARENA_HELPERS(nsRubyTextContainerFrame)
+
+nsContainerFrame*
+NS_NewRubyTextContainerFrame(nsIPresShell* aPresShell,
+                             nsStyleContext* aContext)
+{
+  return new (aPresShell) nsRubyTextContainerFrame(aContext);
+}
+
+
+//----------------------------------------------------------------------
+
+// nsRubyTextContainerFrame Method Implementations
+// ===============================================
+
+nsIAtom*
+nsRubyTextContainerFrame::GetType() const
+{
+  return nsGkAtoms::rubyTextContainerFrame;
+}
+
+#ifdef DEBUG_FRAME_DUMP
+nsresult
+nsRubyTextContainerFrame::GetFrameName(nsAString& aResult) const
+{
+  return MakeFrameName(NS_LITERAL_STRING("RubyTextContainer"), aResult);
+}
+#endif
+
+/* virtual */ bool
+nsRubyTextContainerFrame::IsFrameOfType(uint32_t aFlags) const
+{
+  if (aFlags & eSupportsCSSTransforms) {
+    return false;
+  }
+  return nsContainerFrame::IsFrameOfType(aFlags);
+}
+
+/* virtual */ void
+nsRubyTextContainerFrame::SetInitialChildList(ChildListID aListID,
+                                              nsFrameList& aChildList)
+{
+  nsContainerFrame::SetInitialChildList(aListID, aChildList);
+  if (aListID == kPrincipalList) {
+    UpdateSpanFlag();
+  }
+}
+
+/* virtual */ void
+nsRubyTextContainerFrame::AppendFrames(ChildListID aListID,
+                                       nsFrameList& aFrameList)
+{
+  nsContainerFrame::AppendFrames(aListID, aFrameList);
+  UpdateSpanFlag();
+}
+
+/* virtual */ void
+nsRubyTextContainerFrame::InsertFrames(ChildListID aListID,
+                                       nsIFrame* aPrevFrame,
+                                       nsFrameList& aFrameList)
+{
+  nsContainerFrame::InsertFrames(aListID, aPrevFrame, aFrameList);
+  UpdateSpanFlag();
+}
+
+/* virtual */ void
+nsRubyTextContainerFrame::RemoveFrame(ChildListID aListID,
+                                      nsIFrame* aOldFrame)
+{
+  nsContainerFrame::RemoveFrame(aListID, aOldFrame);
+  UpdateSpanFlag();
+}
+
+void
+nsRubyTextContainerFrame::UpdateSpanFlag()
+{
+  bool isSpan = false;
+  // The continuation checks are safe here because spans never break.
+  if (!GetPrevContinuation() && !GetNextContinuation()) {
+    nsIFrame* onlyChild = mFrames.OnlyChild();
+    if (onlyChild && onlyChild->IsPseudoFrame(GetContent())) {
+      // Per CSS Ruby spec, if the only child of an rtc frame is
+      // a pseudo rt frame, it spans all bases in the segment.
+      isSpan = true;
+    }
+  }
+
+  if (isSpan) {
+    AddStateBits(NS_RUBY_TEXT_CONTAINER_IS_SPAN);
+  } else {
+    RemoveStateBits(NS_RUBY_TEXT_CONTAINER_IS_SPAN);
+  }
+}
+
+/* virtual */ void
+nsRubyTextContainerFrame::Reflow(nsPresContext* aPresContext,
+                                 ReflowOutput& aDesiredSize,
+                                 const ReflowInput& aReflowInput,
+                                 nsReflowStatus& aStatus)
+{
+  MarkInReflow();
+  DO_GLOBAL_REFLOW_COUNT("nsRubyTextContainerFrame");
+  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
+
+  // Although a ruby text container may have continuations, returning
+  // NS_FRAME_COMPLETE here is still safe, since its parent, ruby frame,
+  // ignores the status, and continuations of the ruby base container
+  // will take care of our continuations.
+  aStatus = NS_FRAME_COMPLETE;
+  WritingMode lineWM = aReflowInput.mLineLayout->GetWritingMode();
+
+  nscoord minBCoord = nscoord_MAX;
+  nscoord maxBCoord = nscoord_MIN;
+  // The container size is not yet known, so we use a dummy (0, 0) size.
+  // The block-dir position will be corrected below after containerSize
+  // is finalized.
+  const nsSize dummyContainerSize;
+  for (nsFrameList::Enumerator e(mFrames); !e.AtEnd(); e.Next()) {
+    nsIFrame* child = e.get();
+    MOZ_ASSERT(child->GetType() == nsGkAtoms::rubyTextFrame);
+    LogicalRect rect = child->GetLogicalRect(lineWM, dummyContainerSize);
+    LogicalMargin margin = child->GetLogicalUsedMargin(lineWM);
+    nscoord blockStart = rect.BStart(lineWM) - margin.BStart(lineWM);
+    minBCoord = std::min(minBCoord, blockStart);
+    nscoord blockEnd = rect.BEnd(lineWM) + margin.BEnd(lineWM);
+    maxBCoord = std::max(maxBCoord, blockEnd);
+  }
+
+  LogicalSize size(lineWM, mISize, 0);
+  if (!mFrames.IsEmpty()) {
+    if (MOZ_UNLIKELY(minBCoord > maxBCoord)) {
+      // XXX When bug 765861 gets fixed, this warning should be upgraded.
+      NS_WARNING("bad block coord");
+      minBCoord = maxBCoord = 0;
+    }
+    size.BSize(lineWM) = maxBCoord - minBCoord;
+    nsSize containerSize = size.GetPhysicalSize(lineWM);
+    for (nsFrameList::Enumerator e(mFrames); !e.AtEnd(); e.Next()) {
+      nsIFrame* child = e.get();
+      // We reflowed the child with a dummy container size, as the true size
+      // was not yet known at that time.
+      LogicalPoint pos = child->GetLogicalPosition(lineWM, dummyContainerSize);
+      // Adjust block position to account for minBCoord,
+      // then reposition child based on the true container width.
+      pos.B(lineWM) -= minBCoord;
+      // Relative positioning hasn't happened yet.
+      // So MovePositionBy should not be used here.
+      child->SetPosition(lineWM, pos, containerSize);
+      nsContainerFrame::PlaceFrameView(child);
+    }
+  }
+
+  aDesiredSize.SetSize(lineWM, size);
+}