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LibWeb: Support cellpadding=0 and invalidate table cells when it changes

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We were incorrectly treating cellpadding=0 as if the attribute was
missing. This commit fixes it so it behaves as `padding: 0` on cells.

When adding a test, I discovered that we were not invalidating style for
cells when their containing table's cellpadding attribute changed.
So this commit fixes that as well.
This commit is contained in:
Andreas Kling 2025-02-21 00:43:26 +01:00 • committed by Tim Ledbetter
parent fe2dff4944
commit 20c859519b
Notes: github-actions[bot] 2025-02-21 01:17:42 +00:00
6 changed files with 44 additions and 15 deletions
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12
Libraries/LibWeb/HTML/HTMLTableCellElement.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2020-2022, Andreas Kling <andreas@ladybird.org>
* Copyright (c) 2020-2025, Andreas Kling <andreas@ladybird.org>
* Copyright (c) 2024, Jamie Mansfield <jmansfield@cadixdev.org>
*
* SPDX-License-Identifier: BSD-2-Clause
@ -99,11 +99,11 @@ void HTMLTableCellElement::apply_presentational_hints(GC::Ref<CSS::CascadedPrope
if (!table_element)
return;
if (auto padding = table_element->padding()) {
cascaded_properties->set_property_from_presentational_hint(CSS::PropertyID::PaddingTop, CSS::LengthStyleValue::create(CSS::Length::make_px(padding)));
cascaded_properties->set_property_from_presentational_hint(CSS::PropertyID::PaddingBottom, CSS::LengthStyleValue::create(CSS::Length::make_px(padding)));
cascaded_properties->set_property_from_presentational_hint(CSS::PropertyID::PaddingLeft, CSS::LengthStyleValue::create(CSS::Length::make_px(padding)));
cascaded_properties->set_property_from_presentational_hint(CSS::PropertyID::PaddingRight, CSS::LengthStyleValue::create(CSS::Length::make_px(padding)));
if (auto padding = table_element->cellpadding(); padding.has_value()) {
cascaded_properties->set_property_from_presentational_hint(CSS::PropertyID::PaddingTop, CSS::LengthStyleValue::create(CSS::Length::make_px(*padding)));
cascaded_properties->set_property_from_presentational_hint(CSS::PropertyID::PaddingBottom, CSS::LengthStyleValue::create(CSS::Length::make_px(*padding)));
cascaded_properties->set_property_from_presentational_hint(CSS::PropertyID::PaddingLeft, CSS::LengthStyleValue::create(CSS::Length::make_px(*padding)));
cascaded_properties->set_property_from_presentational_hint(CSS::PropertyID::PaddingRight, CSS::LengthStyleValue::create(CSS::Length::make_px(*padding)));
}
auto border = table_element->border();