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layout: Implement border-spacing per CSS 2.1 § 17.6.1 and the legacy

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`cellspacing` attribute per HTML5 § 14.3.9.

Table layout code has been refactored to push the spacing down to
rowgroups and rows; this will aid the implementation of
`border-collapse` as well.

This commit also fixes two nasty issues in table layout:

* In fixed layout, extra space would not be divided among columns that
  had auto width but had nonzero minimum width.

* In automatic layout, extra space would be distributed to constrained
  columns as well even if unconstrained columns with percentage equal to
  zero were present.
This commit is contained in:
Patrick Walton 2014-12-17 16:44:37 -08:00
parent e8f1a046c6
commit 586c12ccc4
26 changed files with 690 additions and 208 deletions
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22
components/style/selector_matching.rs
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@ -193,16 +193,19 @@ impl Stylist {
let mut shareable = true;
// Step 1: Virtual rules that are synthesized from legacy HTML attributes.
self.synthesize_presentational_hints_for_legacy_attributes(element,
applicable_declarations,
&mut shareable);
// Step 2: Normal rules.
// Step 1: Normal user-agent rules.
map.user_agent.normal.get_all_matching_rules(element,
parent_bf,
applicable_declarations,
&mut shareable);
// Step 2: Presentational hints.
self.synthesize_presentational_hints_for_legacy_attributes(element,
applicable_declarations,
&mut shareable);
// Step 3: User and author normal rules.
map.user.normal.get_all_matching_rules(element,
parent_bf,
applicable_declarations,
@ -212,27 +215,27 @@ impl Stylist {
applicable_declarations,
&mut shareable);
// Step 3: Normal style attributes.
// Step 4: Normal style attributes.
style_attribute.map(|sa| {
shareable = false;
applicable_declarations.vec_push(
GenericDeclarationBlock::from_declarations(sa.normal.clone()))
});
// Step 4: Author-supplied `!important` rules.
// Step 5: Author-supplied `!important` rules.
map.author.important.get_all_matching_rules(element,
parent_bf,
applicable_declarations,
&mut shareable);
// Step 5: `!important` style attributes.
// Step 6: `!important` style attributes.
style_attribute.map(|sa| {
shareable = false;
applicable_declarations.vec_push(
GenericDeclarationBlock::from_declarations(sa.important.clone()))
});
// Step 6: User and UA `!important` rules.
// Step 7: User and UA `!important` rules.
map.user.important.get_all_matching_rules(element,
parent_bf,
applicable_declarations,
@ -277,3 +280,4 @@ impl PerPseudoElementSelectorMap {
}
}
}