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Avoid a panic when handling collapsing borders (fixes #7144)

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There is no need to compute next_collapsed_borders_in_block_direction for all
kind of flows when it's used only in the table row case. That also avoids a panic
when the next child is a table colgroup (this should not happen when iterating
over a table row).
This commit is contained in:
Anthony Ramine 2015-08-17 00:16:34 +02:00
parent 5ab9aa5013
commit d885958621
16 changed files with 28 additions and 59 deletions
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48
components/layout/table.rs
View file

@ -262,32 +262,6 @@ impl Flow for TableFlow {
{
let mut iterator = self.block_flow.base.child_iter().peekable();
while let Some(kid) = iterator.next() {
let next_index_and_sibling = iterator.peek();
let next_collapsed_borders_in_block_direction = if collapsing_borders {
match next_index_and_sibling {
Some(next_sibling) => {
if next_sibling.is_table_rowgroup() {
NextBlockCollapsedBorders::FromNextRow(
&next_sibling.as_immutable_table_rowgroup()
.preliminary_collapsed_borders
.block_start)
} else {
NextBlockCollapsedBorders::FromNextRow(
&next_sibling.as_immutable_table_row()
.preliminary_collapsed_borders
.block_start)
}
}
None => {
NextBlockCollapsedBorders::FromTable(
CollapsedBorder::block_end(&*self.block_flow.fragment.style,
CollapsedBorderProvenance::FromTable))
}
}
} else {
NextBlockCollapsedBorders::NotCollapsingBorders
};
if kid.is_table_colgroup() {
for specified_inline_size in &kid.as_table_colgroup().inline_sizes {
self.column_intrinsic_inline_sizes.push(ColumnIntrinsicInlineSize {
@ -313,6 +287,28 @@ impl Flow for TableFlow {
first_row,
self.table_layout);
if collapsing_borders {
let next_index_and_sibling = iterator.peek();
let next_collapsed_borders_in_block_direction =
match next_index_and_sibling {
Some(next_sibling) => {
if next_sibling.is_table_rowgroup() {
NextBlockCollapsedBorders::FromNextRow(
&next_sibling.as_immutable_table_rowgroup()
.preliminary_collapsed_borders
.block_start)
} else {
NextBlockCollapsedBorders::FromNextRow(
&next_sibling.as_immutable_table_row()
.preliminary_collapsed_borders
.block_start)
}
}
None => {
NextBlockCollapsedBorders::FromTable(
CollapsedBorder::block_end(&*self.block_flow.fragment.style,
CollapsedBorderProvenance::FromTable))
}
};
perform_border_collapse_for_row(
kid.as_table_row(),
table_inline_collapsed_borders.as_ref().unwrap(),