Fix inline context padding on inline-block.

Fixes categories bar on wikipedia - ref #2554.

components/layout/fragment.rs

@@ -1178,9 +1178,9 @@ impl Fragment {
                             -> IntrinsicISizes {
         let mut result = self.style_specified_intrinsic_inline_size();
 
-        match self.specific {
+        let use_border_padding = match self.specific {
             GenericFragment | IframeFragment(_) | TableFragment | TableCellFragment | TableColumnFragment(_) | TableRowFragment |
-            TableWrapperFragment => {}
+            TableWrapperFragment => { true }
             InlineBlockFragment(ref mut info) => {
                 let block_flow = info.flow_ref.get_mut().as_block();
                 result.minimum_inline_size = max(result.minimum_inline_size,
@@ -1189,11 +1189,13 @@ impl Fragment {
                 result.preferred_inline_size = max(result.preferred_inline_size,
                         block_flow.base.intrinsic_inline_sizes.preferred_inline_size +
                         block_flow.base.intrinsic_inline_sizes.surround_inline_size);
+                false
             },
             ImageFragment(ref mut image_fragment_info) => {
                 let image_inline_size = image_fragment_info.image_inline_size();
                 result.minimum_inline_size = max(result.minimum_inline_size, image_inline_size);
                 result.preferred_inline_size = max(result.preferred_inline_size, image_inline_size);
+                true
             }
             ScannedTextFragment(ref text_fragment_info) => {
                 let range = &text_fragment_info.range;
@@ -1205,19 +1207,22 @@ impl Fragment {
 
                 result.minimum_inline_size = max(result.minimum_inline_size, min_line_inline_size);
                 result.preferred_inline_size = max(result.preferred_inline_size, max_line_inline_size);
+                true
             }
             UnscannedTextFragment(..) => fail!("Unscanned text fragments should have been scanned by now!"),
-        }
+        };
 
         // Take borders and padding for parent inline fragments into account, if necessary.
-        match self.inline_context {
-            None => {}
-            Some(ref context) => {
-                for style in context.styles.iter() {
-                    let border_width = style.logical_border_width().inline_start_end();
-                    let padding_inline_size = model::padding_from_style(&**style, Au(0)).inline_start_end();
-                    result.minimum_inline_size = result.minimum_inline_size + border_width + padding_inline_size;
-                    result.preferred_inline_size = result.preferred_inline_size + border_width + padding_inline_size;
+        if use_border_padding {
+            match self.inline_context {
+                None => {}
+                Some(ref context) => {
+                    for style in context.styles.iter() {
+                        let border_width = style.logical_border_width().inline_start_end();
+                        let padding_inline_size = model::padding_from_style(&**style, Au(0)).inline_start_end();
+                        result.minimum_inline_size = result.minimum_inline_size + border_width + padding_inline_size;
+                        result.preferred_inline_size = result.preferred_inline_size + border_width + padding_inline_size;
+                    }
                 }
             }
         }
@@ -1447,8 +1452,7 @@ impl Fragment {
             InlineBlockFragment(ref mut info) => {
                 let block_flow = info.flow_ref.get_mut().as_block();
                 self.border_box.size.inline = block_flow.base.intrinsic_inline_sizes.preferred_inline_size +
-                                                block_flow.base.intrinsic_inline_sizes.surround_inline_size +
-                                                noncontent_inline_size;
+                                                block_flow.base.intrinsic_inline_sizes.surround_inline_size;
                 block_flow.base.position.size.inline = self.border_box.size.inline;
             }
             ScannedTextFragment(_) => {

tests/ref/basic.list

@@ -140,3 +140,4 @@ flaky_gpu,flaky_linux == acid2_noscroll.html acid2_ref_broken.html
 == img_block_maxwidth_b.html img_block_maxwidth_ref.html
 == float_clearance_a.html float_clearance_ref.html
 == block_formatting_context_a.html block_formatting_context_ref.html
+== inline_block_parent_padding_a.html inline_block_parent_padding_ref.html

tests/ref/css/ahem.css

@@ -0,0 +1,10 @@
+@font-face {
+    font-family: 'ahem';
+    src: url(../fonts/ahem/ahem.ttf);
+}
+
+body {
+    font-family: 'ahem';
+    font-size: 100px;
+    line-height: 1;
+}

tests/ref/inline_block_parent_padding_a.html

@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <link rel="stylesheet" type="text/css" href="css/ahem.css">
+        <style type="text/css">
+            body {
+                margin: 0;
+            }
+            ul {
+                margin: 0;
+                padding: 0;
+                list-style: none;
+                list-style-type: none;
+                list-style-image: none;
+            }
+            li {
+                display: inline-block;
+                padding: 0 100px;
+                color: red;
+                background-color: yellow;
+            }
+        </style>
+    </head>
+    <body>
+        <ul><li>X</li></ul>
+    </body>
+</html>

tests/ref/inline_block_parent_padding_ref.html

@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <style type="text/css">
+            body {
+                margin: 0;
+            }
+            div {
+                float: left;
+                width: 100px;
+                height: 100px;
+            }
+            .red {
+                background-color: red;
+            }
+            .yellow {
+                background-color: yellow;
+            }
+        </style>
+    </head>
+    <body>
+        <div class="yellow"></div>
+        <div class="red"></div>
+        <div class="yellow"></div>
+    </body>
+</html>