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script: Clamp table spans according to the HTML specification (#36703)

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Previously, spans were partially clamped during layout, but this means
that accessing and setting these properties via script wouldn't behave
according to the HTML specification. In addition, the value wasn't
floored in layout, so could lead to panics. This change improves
clamping and moves it to script.
    
Testing: This change includes a new WPT test.
Fixes #36699.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2025-05-01 15:25:34 +02:00 • committed by GitHub
parent b10fc49e8a
commit 0d21992edd
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GPG key ID: B5690EEEBB952194
9 changed files with 177 additions and 75 deletions
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35
components/script/dom/htmltablecellelement.rs
View file

@ -70,13 +70,17 @@ impl HTMLTableCellElementMethods<crate::DomTypeHolder> for HTMLTableCellElement
make_uint_getter!(ColSpan, "colspan", DEFAULT_COLSPAN);
// https://html.spec.whatwg.org/multipage/#dom-tdth-colspan
make_uint_setter!(SetColSpan, "colspan", DEFAULT_COLSPAN);
// > The colSpan IDL attribute must reflect the colspan content attribute. It is clamped to
// > the range [1, 1000], and its default value is 1.
make_clamped_uint_setter!(SetColSpan, "colspan", 1, 1000, 1);
// https://html.spec.whatwg.org/multipage/#dom-tdth-rowspan
make_uint_getter!(RowSpan, "rowspan", DEFAULT_ROWSPAN);
// https://html.spec.whatwg.org/multipage/#dom-tdth-rowspan
make_uint_setter!(SetRowSpan, "rowspan", DEFAULT_ROWSPAN);
// > The rowSpan IDL attribute must reflect the rowspan content attribute. It is clamped to
// > the range [0, 65534], and its default value is 1.
make_clamped_uint_setter!(SetRowSpan, "rowspan", 0, 65534, 1);
// https://html.spec.whatwg.org/multipage/#dom-tdth-bgcolor
make_getter!(BgColor, "bgcolor");
@ -174,23 +178,26 @@ impl VirtualMethods for HTMLTableCellElement {
match *local_name {
local_name!("colspan") => {
let mut attr = AttrValue::from_u32(value.into(), DEFAULT_COLSPAN);
if let AttrValue::UInt(_, ref mut val) = attr {
if *val == 0 {
*val = 1;
}
if let AttrValue::UInt(_, ref mut value) = attr {
// From <https://html.spec.whatwg.org/multipage/#dom-tdth-colspan>:
// > The colSpan IDL attribute must reflect the colspan content attribute. It is clamped to
// > the range [1, 1000], and its default value is 1.
*value = (*value).clamp(1, 1000);
}
attr
},
local_name!("rowspan") => {
let mut attr = AttrValue::from_u32(value.into(), DEFAULT_ROWSPAN);
if let AttrValue::UInt(_, ref mut val) = attr {
if *val == 0 {
let node = self.upcast::<Node>();
let doc = node.owner_doc();
// rowspan = 0 is not supported in quirks mode
if doc.quirks_mode() != QuirksMode::NoQuirks {
*val = 1;
}
if let AttrValue::UInt(_, ref mut value) = attr {
// From <https://html.spec.whatwg.org/multipage/#dom-tdth-rowspan>:
// > The rowSpan IDL attribute must reflect the rowspan content attribute. It is clamped to
// > the range [0, 65534], and its default value is 1.
// Note that rowspan = 0 is not supported in quirks mode.
let document = self.upcast::<Node>().owner_doc();
if document.quirks_mode() != QuirksMode::NoQuirks {
*value = (*value).clamp(1, 65534);
} else {
*value = (*value).clamp(0, 65534);
}
}
attr

17
components/script/dom/htmltablecolelement.rs
View file

@ -20,8 +20,6 @@ use crate::dom::node::Node;
use crate::dom::virtualmethods::VirtualMethods;
use crate::script_runtime::CanGc;
const DEFAULT_SPAN: u32 = 1;
#[dom_struct]
pub(crate) struct HTMLTableColElement {
htmlelement: HTMLElement,
@ -62,9 +60,11 @@ impl HTMLTableColElement {
impl HTMLTableColElementMethods<crate::DomTypeHolder> for HTMLTableColElement {
// <https://html.spec.whatwg.org/multipage/#attr-col-span>
make_uint_getter!(Span, "span", DEFAULT_SPAN);
make_uint_getter!(Span, "span", 1);
// <https://html.spec.whatwg.org/multipage/#attr-col-span>
make_uint_setter!(SetSpan, "span", DEFAULT_SPAN);
// > The span IDL attribute must reflect the content attribute of the same name. It is clamped
// > to the range [1, 1000], and its default value is 1.
make_clamped_uint_setter!(SetSpan, "span", 1, 1000, 1);
}
pub(crate) trait HTMLTableColElementLayoutHelpers<'dom> {
@ -96,11 +96,12 @@ impl VirtualMethods for HTMLTableColElement {
fn parse_plain_attribute(&self, local_name: &LocalName, value: DOMString) -> AttrValue {
match *local_name {
local_name!("span") => {
let mut attr = AttrValue::from_u32(value.into(), DEFAULT_SPAN);
let mut attr = AttrValue::from_u32(value.into(), 1);
if let AttrValue::UInt(_, ref mut val) = attr {
if *val == 0 {
*val = 1;
}
// From <https://html.spec.whatwg.org/multipage/#attr-col-span>:
// > The span IDL attribute must reflect the content attribute of the same name.
// > It is clamped to the range [1, 1000], and its default value is 1.
*val = (*val).clamp(1, 1000);
}
attr
},

20
components/script/dom/macros.rs
View file

@ -317,6 +317,26 @@ macro_rules! make_uint_setter(
};
);
#[macro_export]
macro_rules! make_clamped_uint_setter(
($attr:ident, $htmlname:tt, $min:expr, $max:expr, $default:expr) => (
fn $attr(&self, value: u32) {
use $crate::dom::bindings::inheritance::Castable;
use $crate::dom::element::Element;
use $crate::dom::values::UNSIGNED_LONG_MAX;
use $crate::script_runtime::CanGc;
let value = if value > UNSIGNED_LONG_MAX {
$default
} else {
value.clamp($min, $max)
};
let element = self.upcast::<Element>();
element.set_uint_attribute(&html5ever::local_name!($htmlname), value, CanGc::note())
}
);
);
#[macro_export]
macro_rules! make_limited_uint_setter(
($attr:ident, $htmlname:tt, $default:expr) => (