Bug 958714 Remove special case for flex & grid items' percent block-axis margin/padding resolution, to align with other browsers

layout/generic/ReflowInput.cpp

@@ -2142,14 +2142,11 @@ OffsetPercentBasis(const nsIFrame*    aFrame,
                    WritingMode        aWM,
                    const LogicalSize& aContainingBlockSize)
 {
+  // XXX The next patch in this series will get rid of this function and have
+  // the upstream/downstream code just work with the one nscoord value that
+  // we'll be dealing with now (which is aContainingBlockSize.ISize(aWM)).
   LogicalSize offsetPercentBasis = aContainingBlockSize;
-  if (MOZ_LIKELY(!aFrame->GetParent() ||
+  offsetPercentBasis.BSize(aWM) = offsetPercentBasis.ISize(aWM);
-                 !aFrame->GetParent()->IsFlexOrGridContainer())) {
-    offsetPercentBasis.BSize(aWM) = offsetPercentBasis.ISize(aWM);
-  } else if (offsetPercentBasis.BSize(aWM) == NS_AUTOHEIGHT) {
-    offsetPercentBasis.BSize(aWM) = 0;
-  }
-
   return offsetPercentBasis;
 }
 

layout/reftests/css-grid/grid-auto-min-sizing-definite-001-ref.html

@@ -67,18 +67,18 @@ b40 {
   width: 42px;
   /* This margin-left is 20% of 98px-wide grid area */
   margin-left: 19.6px;
-  /* This padding-bottom is 10% of 47.5px tall grid area */
+  /* This padding-bottom is 10% of 98px wide grid area */
   /* This padding-left   is 30% of 98px wide grid area */
-  padding: 1px 3px 4.75px 29.4px;
+  padding: 1px 3px 9.8px 29.4px;
 }
 .v.r {
   height: 42px;
   width: 42px;
   /* This margin-left is 20% of 54px-wide grid area */
   margin-left: 10.8px;
-  /* This padding-bottom is 10% of 102.5px tall grid area */
+  /* This padding-bottom is 10% of 54px wide grid area */
   /* This padding-left   is 30% of 54px wide grid area */
-  padding: 1px 3px 10.25px 16.2px;
+  padding: 1px 3px 5.4px 16.2px;
 }
 
 .r { position:relative; }

layout/reftests/css-grid/grid-item-sizing-percent-001-ref.html

@@ -30,8 +30,8 @@ body,html { color:black; background:white; font-size:16px; padding:0; margin:0;
 }
 .p { padding:2px 3px; }
 .m { margin:2px 3px; }
-.c1.p,.c2.p { padding:5px 9px; }
+.c1.p,.c2.p { padding:6px 9px; }
-.c1.m,.c2.m { margin:5px 9px; }
+.c1.m,.c2.m { margin:6px 9px; }
 .b { border:solid black; }
 
 #t1 { width:50px; height: 20px; }

layout/reftests/css-grid/grid-item-sizing-percent-001.html

@@ -48,8 +48,8 @@ body,html { color:black; background:white; font-size:16px; padding:0; margin:0;
   box-sizing: border-box;
 }
 
-.p { padding:10% 6%; }
+.p { padding:4% 6%; }
-.m { margin:10% 6%; }
+.m { margin:4% 6%; }
 .b { border:solid black; }
 
 </style>

layout/reftests/css-grid/grid-item-sizing-px-001.html

@@ -46,8 +46,8 @@ body,html { color:black; background:white; font-size:16px; padding:0; margin:0;
 
 .p { padding:2px 3px; }
 .m { margin:2px 3px; }
-.c1.p,.c2.p { padding:5px 9px; }
+.c1.p,.c2.p { padding:6px 9px; }
-.c1.m,.c2.m { margin:5px 9px; }
+.c1.m,.c2.m { margin:6px 9px; }
 .b { border:solid black; }
 
 </style>

layout/reftests/css-grid/reftest.list

@@ -45,7 +45,7 @@ skip-if(Android) fuzzy-if(winWidget,1,32) == grid-placement-auto-implicit-001.ht
 == vrl-grid-placement-auto-row-sparse-001.html vrl-grid-placement-auto-row-sparse-001-ref.html
 == grid-relpos-items-001.html grid-relpos-items-001-ref.html
 == grid-item-sizing-percent-001.html grid-item-sizing-percent-001-ref.html
-== grid-item-sizing-percent-002.html grid-item-sizing-percent-002-ref.html
+fails == grid-item-sizing-percent-002.html grid-item-sizing-percent-002-ref.html # bug 1434397
 == grid-item-sizing-percent-003.html grid-item-sizing-percent-003-ref.html
 == grid-item-sizing-percent-004.html grid-item-sizing-percent-004-ref.html
 == grid-item-sizing-px-001.html grid-item-sizing-percent-001-ref.html

layout/reftests/w3c-css/submitted/flexbox/flexbox-mbp-horiz-004-ref.xhtml

@@ -4,8 +4,7 @@
      http://creativecommons.org/publicdomain/zero/1.0/
 -->
 <!-- Reference case - identical to the testcase, but with with the flex items'
-     vertical margin and padding values set to 0 by default, and then set to
+     margin and padding values set to explicit pixel values.
-     specific pixel values for the items that have a 50px percent-basis.
 -->
 <html xmlns="http://www.w3.org/1999/xhtml">
   <head>
@@ -21,27 +20,10 @@
       }
       div.height50 { height: 50px; }
 
-      .marginA  { margin:  0  8% 0  4%; }
+      .marginA  { margin:  20px 16px 12px  8px; }
-      .marginB  { margin:  0 10% 0 14%; }
+      .marginB  { margin:  16px 20px 24px 28px; }
-      .paddingA { padding: 0  6% 0  2%; }
+      .paddingA { padding: 16px 12px  8px  4px; }
-      .paddingB { padding: 0  8% 0 12%; }
+      .paddingB { padding: 12px 16px 20px 24px; }
-
-      div.height50 > .marginA {
-        margin-top: 5px;
-        margin-bottom: 3px;
-      }
-      div.height50 > .marginB {
-        margin-top: 4px;
-        margin-bottom: 6px;
-      }
-      div.height50 > .paddingA {
-        padding-top: 4px;
-        padding-bottom: 2px;
-      }
-      div.height50 > .paddingB {
-        padding-top: 3px;
-        padding-bottom: 5px;
-      }
 
       div.child1 {
         flex: none;

layout/reftests/w3c-css/submitted/flexbox/flexbox-mbp-horiz-004.xhtml

@@ -3,19 +3,17 @@
      Any copyright is dedicated to the Public Domain.
      http://creativecommons.org/publicdomain/zero/1.0/
 -->
-<!-- Testcase with percent-valued padding and/or margin on flex items. The spec
+<!-- Testcase with percent-valued padding and/or margin on flex items.
-     says that percentage values on padding/margin-top and -bottom should be
+     The spec allows these to be resolved against the flex container's
-     resolved against the flex container's height (not its width, as would
+     inline size (regardless of which axis the percent padding/margin is in).
-     be the case in a block).
 -->
 <html xmlns="http://www.w3.org/1999/xhtml">
   <head>
     <title>CSS Test: Testing percent-valued padding and margin on flex items</title>
     <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com"/>
-    <link rel="help" href="http://www.w3.org/TR/css-flexbox-1/#layout-algorithm"/>
+    <link rel="help" href="https://www.w3.org/TR/css-flexbox-1/#item-margins"/>
     <link rel="match" href="flexbox-mbp-horiz-004-ref.xhtml"/>
     <style>
-      div { border: 0; }
       div.flexbox {
         width: 200px;
         display: flex;
@@ -52,8 +50,9 @@
     </style>
   </head>
   <body>
-    <!-- Flex container is auto-height - vertical margin and padding should
+    <!-- Flex container is auto-height - this shouldn't impact percent
-         resolve to 0, since they don't have anything to resolve % against. -->
+         margin/padding resolution, since they resolve against container's
+         inline-size, i.e. its width in this case. -->
     <div class="flexbox"
          ><div class="child1 paddingA"><div class="filler"/></div
          ><div class="child2 paddingB"><div class="filler"/></div
@@ -61,8 +60,9 @@
          ><div class="child2 marginB"></div
     ></div>
 
-    <!-- Flex container has height: 50px - vertical margin and padding should
+    <!-- Flex container has height: 50px - again, this shouldn't impact percent
-         resolve % values against that. -->
+         margin/padding resolution, since they resolve against container's
+         inline-size, i.e. its width in this case. -->
     <div class="flexbox height50"
          ><div class="child1 paddingA"><div class="filler"/></div
          ><div class="child2 paddingB"><div class="filler"/></div