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Merge pull request #3498 from pcwalton/border-box-double-counting

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Stop double-counting stuff in inline-block

Reviewed-by: glennw
This commit is contained in:
bors-servo 2014-09-27 13:12:30 -06:00
commit b7345796bc
4 changed files with 97 additions and 45 deletions
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126
components/layout/fragment.rs
View file

@ -706,6 +706,11 @@ impl Fragment {
/// Returns true if this element can be split. This is true for text fragments.
pub fn can_split(&self) -> bool {
self.is_scanned_text_fragment()
}
/// Returns true if and only if this is a scanned text fragment.
fn is_scanned_text_fragment(&self) -> bool {
match self.specific {
ScannedTextFragment(..) => true,
_ => false,
@ -990,7 +995,7 @@ impl Fragment {
debug!("Fragment::build_display_list: intersected. Adding display item...");
{
if self.is_primary_fragment() {
let level =
StackingLevel::from_background_and_border_level(background_and_border_level);
@ -1002,11 +1007,12 @@ impl Fragment {
match self.inline_context {
Some(ref inline_context) => {
for style in inline_context.styles.iter().rev() {
self.build_display_list_for_background_if_applicable(&**style,
display_list,
layout_context,
level,
&absolute_fragment_bounds);
self.build_display_list_for_background_if_applicable(
&**style,
display_list,
layout_context,
level,
&absolute_fragment_bounds);
}
}
None => {}
@ -1050,7 +1056,7 @@ impl Fragment {
let content_box = self.content_box();
let absolute_content_box = rect_to_absolute(content_box);
// Add a clip, if applicable.
// Create special per-fragment-type display items.
match self.specific {
UnscannedTextFragment(_) => fail!("Shouldn't see unscanned fragments here."),
TableColumnFragment(_) => fail!("Shouldn't see table column fragments here."),
@ -1084,7 +1090,6 @@ impl Fragment {
};
accumulator.push(display_list, TextDisplayItemClass(text_display_item));
// Create display items for text decoration
{
let line = |maybe_color: Option<RGBA>, rect: || -> LogicalRect<Au>| {
@ -1133,13 +1138,13 @@ impl Fragment {
debug!("{:?}", self.build_debug_borders_around_text_fragments(display_list,
flow_origin,
text_fragment))
},
GenericFragment | IframeFragment(..) | TableFragment | TableCellFragment | TableRowFragment |
TableWrapperFragment | InlineBlockFragment(_) => {
}
GenericFragment | IframeFragment(..) | TableFragment | TableCellFragment |
TableRowFragment | TableWrapperFragment | InlineBlockFragment(_) => {
// FIXME(pcwalton): This is a bit of an abuse of the logging infrastructure. We
// should have a real `SERVO_DEBUG` system.
debug!("{:?}", self.build_debug_borders_around_fragment(display_list, flow_origin))
},
}
ImageFragment(_) => {
match self.specific {
ImageFragment(ref image_fragment) => {
@ -1182,13 +1187,15 @@ impl Fragment {
// problematic if iframes are outside the area we're computing the display list for, since
// they won't be able to reflow at all until the user scrolls to them. Perhaps we should
// separate this into two parts: first we should send the size only to the constellation
// once that's computed during assign-block-sizes, and second we should should send the origin
// to the constellation here during display list construction. This should work because
// layout for the iframe only needs to know size, and origin is only relevant if the
// iframe is actually going to be displayed.
// once that's computed during assign-block-sizes, and second we should should send the
// origin to the constellation here during display list construction. This should work
// because layout for the iframe only needs to know size, and origin is only relevant if
// the iframe is actually going to be displayed.
match self.specific {
IframeFragment(ref iframe_fragment) => {
self.finalize_position_and_size_of_iframe(iframe_fragment, flow_origin, layout_context)
self.finalize_position_and_size_of_iframe(iframe_fragment,
flow_origin,
layout_context)
}
_ => {}
}
@ -1197,13 +1204,12 @@ impl Fragment {
}
/// Returns the intrinsic inline-sizes of this fragment.
pub fn intrinsic_inline_sizes(&mut self)
-> IntrinsicISizes {
pub fn intrinsic_inline_sizes(&mut self) -> IntrinsicISizes {
let mut result = self.style_specified_intrinsic_inline_size();
let use_border_padding = match self.specific {
GenericFragment | IframeFragment(_) | TableFragment | TableCellFragment | TableColumnFragment(_) | TableRowFragment |
TableWrapperFragment => { true }
match self.specific {
GenericFragment | IframeFragment(_) | TableFragment | TableCellFragment |
TableColumnFragment(_) | TableRowFragment | TableWrapperFragment => {}
InlineBlockFragment(ref mut info) => {
let block_flow = info.flow_ref.get_mut().as_block();
result.minimum_inline_size = max(result.minimum_inline_size,
@ -1212,13 +1218,12 @@ 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
result.preferred_inline_size = max(result.preferred_inline_size,
image_inline_size);
}
ScannedTextFragment(ref text_fragment_info) => {
let range = &text_fragment_info.range;
@ -1226,25 +1231,33 @@ impl Fragment {
// See http://dev.w3.org/csswg/css-sizing/#max-content-inline-size.
// TODO: Account for soft wrap opportunities.
let max_line_inline_size = text_fragment_info.run.metrics_for_range(range).advance_width;
let max_line_inline_size = text_fragment_info.run
.metrics_for_range(range)
.advance_width;
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
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);
}
UnscannedTextFragment(..) => {
fail!("Unscanned text fragments should have been scanned by now!")
}
UnscannedTextFragment(..) => fail!("Unscanned text fragments should have been scanned by now!"),
};
// Take borders and padding for parent inline fragments into account, if necessary.
if use_border_padding {
if self.is_primary_fragment() {
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;
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;
}
}
}
@ -1275,8 +1288,8 @@ impl Fragment {
/// Returns, and computes, the block-size of this fragment.
pub fn content_block_size(&self, layout_context: &LayoutContext) -> Au {
match self.specific {
GenericFragment | IframeFragment(_) | TableFragment | TableCellFragment | TableRowFragment |
TableWrapperFragment | InlineBlockFragment(_) => Au(0),
GenericFragment | IframeFragment(_) | TableFragment | TableCellFragment |
TableRowFragment | TableWrapperFragment | InlineBlockFragment(_) => Au(0),
ImageFragment(ref image_fragment_info) => {
image_fragment_info.computed_block_size()
}
@ -1454,10 +1467,12 @@ impl Fragment {
pub fn assign_replaced_inline_size_if_necessary(&mut self,
container_inline_size: Au) {
match self.specific {
GenericFragment | IframeFragment(_) | TableFragment | TableCellFragment | TableRowFragment |
TableWrapperFragment => return,
GenericFragment | IframeFragment(_) | TableFragment | TableCellFragment |
TableRowFragment | TableWrapperFragment => return,
TableColumnFragment(_) => fail!("Table column fragments do not have inline_size"),
UnscannedTextFragment(_) => fail!("Unscanned text fragments should have been scanned by now!"),
UnscannedTextFragment(_) => {
fail!("Unscanned text fragments should have been scanned by now!")
}
ImageFragment(_) | ScannedTextFragment(_) | InlineBlockFragment(_) => {}
};
@ -1529,16 +1544,18 @@ impl Fragment {
}
}
/// Assign block-size for this fragment if it is replaced content. The inline-size must have been assigned
/// first.
/// Assign block-size for this fragment if it is replaced content. The inline-size must have
/// been assigned first.
///
/// Ideally, this should follow CSS 2.1 § 10.6.2.
pub fn assign_replaced_block_size_if_necessary(&mut self) {
match self.specific {
GenericFragment | IframeFragment(_) | TableFragment | TableCellFragment | TableRowFragment |
TableWrapperFragment => return,
GenericFragment | IframeFragment(_) | TableFragment | TableCellFragment |
TableRowFragment | TableWrapperFragment => return,
TableColumnFragment(_) => fail!("Table column fragments do not have block_size"),
UnscannedTextFragment(_) => fail!("Unscanned text fragments should have been scanned by now!"),
UnscannedTextFragment(_) => {
fail!("Unscanned text fragments should have been scanned by now!")
}
ImageFragment(_) | ScannedTextFragment(_) | InlineBlockFragment(_) => {}
}
@ -1581,8 +1598,9 @@ impl Fragment {
self.border_box.size.block = self.border_box.size.block + noncontent_block_size
}
InlineBlockFragment(ref mut info) => {
// Not the primary fragment, so we do not take the noncontent size into account.
let block_flow = info.flow_ref.get_mut().as_block();
self.border_box.size.block = block_flow.base.position.size.block + noncontent_block_size;
self.border_box.size.block = block_flow.base.position.size.block;
}
_ => fail!("should have been handled above"),
}
@ -1660,6 +1678,24 @@ impl Fragment {
let ConstellationChan(ref chan) = layout_context.shared.constellation_chan;
chan.send(msg)
}
/// Returns true if and only if this is the *primary fragment* for the fragment's style object
/// (conceptually, though style sharing makes this not really true, of course). The primary
/// fragment is the one that draws backgrounds, borders, etc., and takes borders, padding and
/// margins into account. Every style object has at most one primary fragment.
///
/// At present, all fragments are primary fragments except for inline-block and table wrapper
/// fragments. Inline-block fragments are not primary fragments because the corresponding block
/// flow is the primary fragment, while table wrapper fragments are not primary fragments
/// because the corresponding table flow is the primary fragment.
fn is_primary_fragment(&self) -> bool {
match self.specific {
InlineBlockFragment(_) | TableWrapperFragment => false,
GenericFragment | IframeFragment(_) | ImageFragment(_) | ScannedTextFragment(_) |
TableFragment | TableCellFragment | TableColumnFragment(_) | TableRowFragment |
UnscannedTextFragment(_) => true,
}
}
}
impl fmt::Show for Fragment {

1
tests/ref/basic.list
View file

@ -150,3 +150,4 @@ flaky_linux == acid2_noscroll.html acid2_ref_broken.html
== block_formatting_context_complex_a.html block_formatting_context_complex_ref.html
== block_formatting_context_containing_floats_a.html block_formatting_context_containing_floats_ref.html
== clear_generated_content_table_a.html clear_generated_content_table_ref.html
== inline_block_border_a.html inline_block_border_ref.html

7
tests/ref/inline_block_border_a.html Normal file
View file

@ -0,0 +1,7 @@
<!DOCTYPE html>
<html>
<body>
<div style="display: inline-block; border: solid black 1px; padding: 6px; height: 64px; width: 64px;"></div>
</body>
</html>

8
tests/ref/inline_block_border_ref.html Normal file
View file

@ -0,0 +1,8 @@
<!DOCTYPE html>
<html>
<body>
<div style="display: block; border: solid black 1px; padding: 6px; height: 64px; width: 64px;"></div>
</body>
</html>