Bug 1476054: Fixes and cleanups for Servo PR #21139. r=me

Logical floats don't appear in the computed style objects, so there's no need to
check for them.

MozReview-Commit-ID: 3ocJrRB3jeO

layout/generic/BlockReflowInput.cpp

@@ -785,7 +785,7 @@ BlockReflowInput::FlowAndPlaceFloat(nsIFrame* aFloat)
   // Find a place to place the float. The CSS2 spec doesn't want
   // floats overlapping each other or sticking out of the containing
   // block if possible (CSS2 spec section 9.5.1, see the rule list).
-  StyleFloat floatStyle = floatDisplay->PhysicalFloats(wm);
+  StyleFloat floatStyle = floatDisplay->mFloat;
   MOZ_ASSERT(StyleFloat::Left == floatStyle || StyleFloat::Right == floatStyle,
              "Invalid float type!");
 
@@ -1045,8 +1045,7 @@ BlockReflowInput::PushFloatPastBreak(nsIFrame *aFloat)
   //    must have their tops below the top of this float)
   //  * don't waste much time trying to reflow this float again until
   //    after the break
-  StyleFloat floatStyle =
-    aFloat->StyleDisplay()->PhysicalFloats(mReflowInput.GetWritingMode());
+  StyleFloat floatStyle = aFloat->StyleDisplay()->mFloat;
   if (floatStyle == StyleFloat::Left) {
     FloatManager()->SetPushedLeftFloatPastBreak();
   } else {

layout/generic/WritingModes.h

@@ -2187,19 +2187,6 @@ nsStylePosition::MaxBSizeDependsOnContainer(mozilla::WritingMode aWM) const
                           : MaxHeightDependsOnContainer();
 }
 
-inline mozilla::StyleFloat
-nsStyleDisplay::PhysicalFloats(mozilla::WritingMode aWM) const
-{
-  using StyleFloat = mozilla::StyleFloat;
-  if (mFloat == StyleFloat::InlineStart) {
-    return aWM.IsBidiLTR() ? StyleFloat::Left : StyleFloat::Right;
-  }
-  if (mFloat == StyleFloat::InlineEnd) {
-    return aWM.IsBidiLTR() ? StyleFloat::Right : StyleFloat::Left;
-  }
-  return mFloat;
-}
-
 inline mozilla::StyleClear
 nsStyleDisplay::PhysicalBreakType(mozilla::WritingMode aWM) const
 {

layout/generic/nsBlockFrame.cpp

@@ -4346,8 +4346,7 @@ nsBlockFrame::SplitFloat(BlockReflowInput& aState,
     nextInFlow->AddStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
   }
 
-  StyleFloat floatStyle =
-    aFloat->StyleDisplay()->PhysicalFloats(aState.mReflowInput.GetWritingMode());
+  StyleFloat floatStyle = aFloat->StyleDisplay()->mFloat;
   if (floatStyle == StyleFloat::Left) {
     aState.FloatManager()->SetSplitLeftFloatAcrossBreak();
   } else {

layout/generic/nsFloatManager.cpp

@@ -206,7 +206,7 @@ nsFloatManager::GetFlowArea(WritingMode aWM, nscoord aBCoord, nscoord aBSize,
       // This float is in our band.
 
       // Shrink our band's width if needed.
-      StyleFloat floatStyle = fi.mFrame->StyleDisplay()->PhysicalFloats(aWM);
+      StyleFloat floatStyle = fi.mFrame->StyleDisplay()->mFloat;
 
       // When aBandInfoType is BandFromPoint, we're only intended to
       // consider a point along the y axis rather than a band.
@@ -283,7 +283,7 @@ nsFloatManager::AddFloat(nsIFrame* aFloatFrame, const LogicalRect& aMarginRect,
     info.mLeftBEnd = nscoord_MIN;
     info.mRightBEnd = nscoord_MIN;
   }
-  StyleFloat floatStyle = aFloatFrame->StyleDisplay()->PhysicalFloats(aWM);
+  StyleFloat floatStyle = aFloatFrame->StyleDisplay()->mFloat;
   MOZ_ASSERT(floatStyle == StyleFloat::Left || floatStyle == StyleFloat::Right,
              "Unexpected float style!");
   nscoord& sideBEnd =
@@ -316,7 +316,7 @@ nsFloatManager::CalculateRegionFor(WritingMode          aWM,
     // Preserve the right margin-edge for left floats and the left
     // margin-edge for right floats
     const nsStyleDisplay* display = aFloat->StyleDisplay();
-    StyleFloat floatStyle = display->PhysicalFloats(aWM);
+    StyleFloat floatStyle = display->mFloat;
     if ((StyleFloat::Left == floatStyle) == aWM.IsBidiLTR()) {
       region.IStart(aWM) = region.IEnd(aWM);
     }

layout/generic/nsFrame.cpp

@@ -5379,7 +5379,7 @@ nsIFrame::InlinePrefISizeData::ForceBreak(StyleClear aBreakType)
         }
       }
 
-      StyleFloat floatStyle = floatDisp->PhysicalFloats(wm);
+      StyleFloat floatStyle = floatDisp->mFloat;
       nscoord& floats_cur =
         floatStyle == StyleFloat::Left ? floats_cur_left : floats_cur_right;
       nscoord floatWidth = floatInfo.Width();
@@ -5414,7 +5414,7 @@ nsIFrame::InlinePrefISizeData::ForceBreak(StyleClear aBreakType)
       // no longer any floats we need to keep. See below.
       for (FloatInfo& floatInfo : Reversed(mFloats)) {
         const nsStyleDisplay* floatDisp = floatInfo.Frame()->StyleDisplay();
-        if (floatDisp->PhysicalFloats(wm) != clearFloatType) {
+        if (floatDisp->mFloat != clearFloatType) {
           newFloats.AppendElement(floatInfo);
         } else {
           // This is a float on the side that this break directly clears

layout/style/ServoCSSPropList.mako.py

@@ -78,6 +78,7 @@ def method(prop):
     "Content",
     "CounterIncrement",
     "CounterReset",
+    "Float",
     "FontFamily",
     "FontFeatureSettings",
     "FontLanguageOverride",

layout/style/nsStyleConsts.h

@@ -144,8 +144,6 @@ enum class StyleFloat : uint8_t {
   None,
   Left,
   Right,
-  InlineStart,
-  InlineEnd
 };
 
 // float-edge

layout/style/nsStyleStruct.h

@@ -2456,10 +2456,6 @@ struct MOZ_NEEDS_MEMMOVABLE_MEMBERS nsStyleDisplay
     mozilla::ComputedStyle&) const;
   void GenerateCombinedTransform();
 public:
-  // Return the 'float' and 'clear' properties, with inline-{start,end} values
-  // resolved to {left,right} according to the given writing mode. These are
-  // defined in WritingModes.h.
-  inline mozilla::StyleFloat PhysicalFloats(mozilla::WritingMode aWM) const;
   inline mozilla::StyleClear PhysicalBreakType(mozilla::WritingMode aWM) const;
 };
 

servo/components/style/properties/gecko.mako.rs

@@ -3083,6 +3083,9 @@ fn static_assert() {
 
     <%call expr="impl_keyword_clone('display', 'mDisplay', display_keyword)"></%call>
 
+    <% float_keyword = Keyword("float", "Left Right None", gecko_enum_prefix="StyleFloat") %>
+    ${impl_keyword('float', 'mFloat', float_keyword)}
+
     <% overflow_x = data.longhands_by_name["overflow-x"] %>
     pub fn set_overflow_y(&mut self, v: longhands::overflow_y::computed_value::T) {
         use properties::longhands::overflow_x::computed_value::T as BaseType;

servo/ports/geckolib/glue.rs

@@ -3951,17 +3951,27 @@ pub extern "C" fn Servo_DeclarationBlock_SetKeywordValue(
     use style::properties::{PropertyDeclaration, LonghandId};
     use style::properties::longhands;
     use style::values::specified::BorderStyle;
+    use style::values::specified::Float;
     use style::values::generics::font::FontStyle;
 
     let long = get_longhand_from_id!(property);
     let value = value as u32;
 
     let prop = match_wrap_declared! { long,
         MozUserModify => longhands::_moz_user_modify::SpecifiedValue::from_gecko_keyword(value),
-        // TextEmphasisPosition => FIXME implement text-emphasis-position
         Direction => longhands::direction::SpecifiedValue::from_gecko_keyword(value),
         Display => longhands::display::SpecifiedValue::from_gecko_keyword(value),
-        Float => longhands::float::SpecifiedValue::from_gecko_keyword(value),
+        Float => {
+            const LEFT: u32 = structs::StyleFloat::Left as u32;
+            const RIGHT: u32 = structs::StyleFloat::Right as u32;
+            const NONE: u32 = structs::StyleFloat::None as u32;
+            match value {
+                LEFT => Float::Left,
+                RIGHT => Float::Right,
+                NONE => Float::None,
+                _ => unreachable!(),
+            }
+        },
         VerticalAlign => longhands::vertical_align::SpecifiedValue::from_gecko_keyword(value),
         TextAlign => longhands::text_align::SpecifiedValue::from_gecko_keyword(value),
         TextEmphasisPosition => longhands::text_emphasis_position::SpecifiedValue::from_gecko_keyword(value),