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style: Add support for touch-action:pinch-zoom - Rewrite to_css and parse for touchAction

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Differential Revision: https://phabricator.services.mozilla.com/D97650
This commit is contained in:
Sunita Sen 2020-11-23 01:40:21 +00:00 • committed by Emilio Cobos Álvarez
parent 9f40b9ba38
commit 85b45cd615
1 changed files with 53 additions and 28 deletions
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77
components/style/values/specified/box.rs
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@ -1199,43 +1199,68 @@ impl ToCss for TouchAction {
where where
W: Write, W: Write,
{ {
match *self { if self.contains(TouchAction::AUTO) {
TouchAction::NONE => dest.write_str("none"), return dest.write_str("auto");
TouchAction::AUTO => dest.write_str("auto"),
TouchAction::MANIPULATION => dest.write_str("manipulation"),
_ if self.contains(TouchAction::PAN_X | TouchAction::PAN_Y) => {
dest.write_str("pan-x pan-y")
},
_ if self.contains(TouchAction::PAN_X) => dest.write_str("pan-x"),
_ if self.contains(TouchAction::PAN_Y) => dest.write_str("pan-y"),
_ => panic!("invalid touch-action value"),
} }
if self.contains(TouchAction::NONE) {
return dest.write_str("none");
}
if self.contains(TouchAction::MANIPULATION) {
return dest.write_str("manipulation");
}
let mut has_any = false;
macro_rules! maybe_write_value {
($ident:path => $str:expr) => {
if self.contains($ident) {
if has_any {
dest.write_str(" ")?;
}
has_any = true;
dest.write_str($str)?;
}
};
}
maybe_write_value!(TouchAction::PAN_X => "pan-x");
maybe_write_value!(TouchAction::PAN_Y => "pan-y");
debug_assert!(has_any);
Ok(())
} }
} }
impl Parse for TouchAction { impl Parse for TouchAction {
/// auto | none | [ pan-x || pan-y ] | manipulation
fn parse<'i, 't>( fn parse<'i, 't>(
_context: &ParserContext, _context: &ParserContext,
input: &mut Parser<'i, 't>, input: &mut Parser<'i, 't>,
) -> Result<TouchAction, ParseError<'i>> { ) -> Result<TouchAction, ParseError<'i>> {
try_match_ident_ignore_ascii_case! { input, let mut result = TouchAction::empty();
"auto" => Ok(TouchAction::AUTO), while let Ok(name) = input.try_parse(|i| i.expect_ident_cloned()) {
"none" => Ok(TouchAction::NONE), let flag = match_ignore_ascii_case! { &name,
"manipulation" => Ok(TouchAction::MANIPULATION), "pan-x" => Some(TouchAction::PAN_X),
"pan-x" => { "pan-y" => Some(TouchAction::PAN_Y),
if input.try_parse(|i| i.expect_ident_matching("pan-y")).is_ok() { "none" if result.is_empty() => return Ok(TouchAction::NONE),
Ok(TouchAction::PAN_X | TouchAction::PAN_Y) "manipulation" if result.is_empty() => return Ok(TouchAction::MANIPULATION),
} else { "auto" if result.is_empty() => return Ok(TouchAction::AUTO),
Ok(TouchAction::PAN_X) _ => None
} };
let flag = match flag {
Some(flag) if !result.contains(flag) => flag,
_ => {
return Err(
input.new_custom_error(SelectorParseErrorKind::UnexpectedIdent(name))
);
}, },
"pan-y" => { };
if input.try_parse(|i| i.expect_ident_matching("pan-x")).is_ok() { result.insert(flag);
Ok(TouchAction::PAN_X | TouchAction::PAN_Y)
} else {
Ok(TouchAction::PAN_Y)
} }
},
if !result.is_empty() {
Ok(result)
} else {
Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError))
} }
} }
} }