Bug 1674450 Part 7 - Store SizeComputationInput's computed margin, border/padding, and padding in logical coordinates. r=layout-reviewers,jfkthame

The one-argument SetComputedLogicalMargin(),
SetComputedLogicalBorderPadding(), and SetComputedLogicalPadding() are
not changed because the next part are going to delete them.

Note that I'm deliberately not making ComputedLogicalMargin() and others
to return `const LogicalMargin&` because the compilers can use RVO to
eliminate unnecessary copy. If we'd like to convert them to accept all
writing mode like `nsIFrame::GetLogicalUsedMargin(WritingMode)` so that
the caller don't need to call `ConvertTo`, they can't return a const
reference anyway.

Differential Revision: https://phabricator.services.mozilla.com/D95370

layout/generic/ReflowInput.cpp

@@ -111,7 +111,10 @@ SizeComputationInput::SizeComputationInput(nsIFrame* aFrame,
                                            gfxContext* aRenderingContext)
     : mFrame(aFrame),
       mRenderingContext(aRenderingContext),
-      mWritingMode(aFrame->GetWritingMode()) {}
+      mWritingMode(aFrame->GetWritingMode()),
+      mComputedMargin(mWritingMode),
+      mComputedBorderPadding(mWritingMode),
+      mComputedPadding(mWritingMode) {}
 
 SizeComputationInput::SizeComputationInput(
     nsIFrame* aFrame, gfxContext* aRenderingContext,
@@ -2446,7 +2449,7 @@ void SizeComputationInput::InitOffsets(WritingMode aCBWM, nscoord aPercentBasis,
         side = MakeLogicalSide(aAxis, eLogicalEdgeEnd);
         val = -val;
       }
-      mComputedPadding.Side(wm.PhysicalSide(side)) += val;
+      mComputedPadding.Side(side, wm) += val;
       needPaddingProp = true;
       if (aAxis == eLogicalAxisBlock && val > 0) {
         // We have a baseline-adjusted block-axis start padding, so

layout/generic/ReflowInput.h

@@ -117,41 +117,41 @@ struct SizeComputationInput {
   // Rendering context to use for measurement.
   gfxContext* mRenderingContext;
 
-  const nsMargin& ComputedPhysicalMargin() const { return mComputedMargin; }
-  const nsMargin& ComputedPhysicalBorderPadding() const {
+  nsMargin ComputedPhysicalMargin() const {
+    return mComputedMargin.GetPhysicalMargin(mWritingMode);
+  }
+  nsMargin ComputedPhysicalBorderPadding() const {
+    return mComputedBorderPadding.GetPhysicalMargin(mWritingMode);
+  }
+  nsMargin ComputedPhysicalPadding() const {
+    return mComputedPadding.GetPhysicalMargin(mWritingMode);
+  }
+
+  LogicalMargin ComputedLogicalMargin() const { return mComputedMargin; }
+  LogicalMargin ComputedLogicalBorderPadding() const {
     return mComputedBorderPadding;
   }
-  const nsMargin& ComputedPhysicalPadding() const { return mComputedPadding; }
-
-  LogicalMargin ComputedLogicalMargin() const {
-    return LogicalMargin(mWritingMode, mComputedMargin);
-  }
-  LogicalMargin ComputedLogicalBorderPadding() const {
-    return LogicalMargin(mWritingMode, mComputedBorderPadding);
-  }
-  LogicalMargin ComputedLogicalPadding() const {
-    return LogicalMargin(mWritingMode, mComputedPadding);
-  }
+  LogicalMargin ComputedLogicalPadding() const { return mComputedPadding; }
 
   void SetComputedLogicalMargin(mozilla::WritingMode aWM,
                                 const LogicalMargin& aMargin) {
-    mComputedMargin = aMargin.GetPhysicalMargin(aWM);
+    mComputedMargin = aMargin.ConvertTo(mWritingMode, aWM);
   }
   void SetComputedLogicalMargin(const LogicalMargin& aMargin) {
     SetComputedLogicalMargin(mWritingMode, aMargin);
   }
 
   void SetComputedLogicalBorderPadding(mozilla::WritingMode aWM,
-                                       const LogicalMargin& aMargin) {
-    mComputedBorderPadding = aMargin.GetPhysicalMargin(aWM);
+                                       const LogicalMargin& aBorderPadding) {
+    mComputedBorderPadding = aBorderPadding.ConvertTo(mWritingMode, aWM);
   }
   void SetComputedLogicalBorderPadding(const LogicalMargin& aMargin) {
     SetComputedLogicalBorderPadding(mWritingMode, aMargin);
   }
 
   void SetComputedLogicalPadding(mozilla::WritingMode aWM,
-                                 const LogicalMargin& aMargin) {
-    mComputedPadding = aMargin.GetPhysicalMargin(aWM);
+                                 const LogicalMargin& aPadding) {
+    mComputedPadding = aPadding.ConvertTo(mWritingMode, aWM);
   }
   void SetComputedLogicalPadding(const LogicalMargin& aMargin) {
     SetComputedLogicalPadding(mWritingMode, aMargin);
@@ -163,17 +163,14 @@ struct SizeComputationInput {
   // cached copy of the frame's writing-mode, for logical coordinates
   WritingMode mWritingMode;
 
-  // These are PHYSICAL coordinates (for now).
-  // Will probably become logical in due course.
-
   // Computed margin values
-  nsMargin mComputedMargin;
+  LogicalMargin mComputedMargin;
 
   // Cached copy of the border + padding values
-  nsMargin mComputedBorderPadding;
+  LogicalMargin mComputedBorderPadding;
 
   // Computed padding values
-  nsMargin mComputedPadding;
+  LogicalMargin mComputedPadding;
 
  public:
   // Callers using this constructor must call InitOffsets on their own.

layout/generic/nsIFrame.cpp

@@ -12353,9 +12353,12 @@ void SizeComputationInput::DisplayInitOffsetsExit(nsIFrame* aFrame,
   if (treeNode->mDisplay) {
     DR_state->DisplayFrameTypeInfo(aFrame, treeNode->mIndent);
     printf("InitOffsets=");
-    DR_state->PrintMargin("m", &aState->ComputedPhysicalMargin());
-    DR_state->PrintMargin("p", &aState->ComputedPhysicalPadding());
-    DR_state->PrintMargin("p+b", &aState->ComputedPhysicalBorderPadding());
+    const auto m = aState->ComputedPhysicalMargin();
+    DR_state->PrintMargin("m", &m);
+    const auto p = aState->ComputedPhysicalPadding();
+    DR_state->PrintMargin("p", &p);
+    const auto bp = aState->ComputedPhysicalBorderPadding();
+    DR_state->PrintMargin("b+p", &bp);
     putchar('\n');
   }
   DR_state->DeleteTreeNode(*treeNode);