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LibWeb: Keep CSS sheets sorted in document tree order

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This ensures that style is applied consistently, even if the document
has external CSS resources that don't always arrive in the same order.
This commit is contained in:
Andreas Kling
2022-09-09 11:08:56 +02:00
parent 32c99313a6
commit 524ec95bcd
4 changed files with 24 additions and 10 deletions
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20
Userland/Libraries/LibWeb/CSS/StyleSheetList.cpp
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@@ -4,6 +4,7 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/QuickSort.h>
#include <LibWeb/Bindings/StyleSheetListPrototype.h>
#include <LibWeb/CSS/StyleSheetList.h>
#include <LibWeb/DOM/Document.h>
@@ -15,6 +16,8 @@ void StyleSheetList::add_sheet(CSSStyleSheet& sheet)
sheet.set_style_sheet_list({}, this);
m_sheets.append(sheet);
sort_sheets();
m_document.style_computer().invalidate_rule_cache();
m_document.style_computer().load_fonts_from_sheet(sheet);
m_document.invalidate_style();
@@ -23,7 +26,9 @@ void StyleSheetList::add_sheet(CSSStyleSheet& sheet)
void StyleSheetList::remove_sheet(CSSStyleSheet& sheet)
{
sheet.set_style_sheet_list({}, nullptr);
m_sheets.remove_first_matching([&](auto& entry) { return &entry == &sheet; });
m_sheets.remove_first_matching([&](auto& entry) { return entry.ptr() == &sheet; });
sort_sheets();
m_document.style_computer().invalidate_rule_cache();
m_document.invalidate_style();
@@ -45,8 +50,8 @@ void StyleSheetList::visit_edges(Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_document);
for (auto& sheet : m_sheets)
visitor.visit(&sheet);
for (auto sheet : m_sheets)
visitor.visit(sheet.ptr());
}
// https://www.w3.org/TR/cssom/#ref-for-dfn-supported-property-indices%E2%91%A1
@@ -65,7 +70,14 @@ JS::Value StyleSheetList::item_value(size_t index) const
if (index >= m_sheets.size())
return JS::js_undefined();
return &m_sheets[index];
return m_sheets[index].ptr();
}
void StyleSheetList::sort_sheets()
{
quick_sort(m_sheets, [](JS::NonnullGCPtr<StyleSheet> a, JS::NonnullGCPtr<StyleSheet> b) {
return a->owner_node()->is_before(*b->owner_node());
});
}
}