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geckolib: Add FFI functions for color parsing.

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This commit is contained in:
Cameron McCormack 2017-10-16 08:53:58 +08:00
parent 1db1c7f544
commit 46695336e8
1 changed files with 65 additions and 1 deletions
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66
ports/geckolib/glue.rs
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@ -44,7 +44,7 @@ use style::gecko_bindings::bindings::{RawServoMediaRule, RawServoMediaRuleBorrow
use style::gecko_bindings::bindings::{RawServoNamespaceRule, RawServoNamespaceRuleBorrowed};
use style::gecko_bindings::bindings::{RawServoPageRule, RawServoPageRuleBorrowed};
use style::gecko_bindings::bindings::{RawServoSelectorListBorrowed, RawServoSelectorListOwned};
use style::gecko_bindings::bindings::{RawServoStyleSetBorrowed, RawServoStyleSetOwned};
use style::gecko_bindings::bindings::{RawServoStyleSetBorrowed, RawServoStyleSetBorrowedOrNull, RawServoStyleSetOwned};
use style::gecko_bindings::bindings::{RawServoStyleSheetContentsBorrowed, ServoComputedDataBorrowed};
use style::gecko_bindings::bindings::{RawServoStyleSheetContentsStrong, ServoStyleContextBorrowed};
use style::gecko_bindings::bindings::{RawServoSupportsRule, RawServoSupportsRuleBorrowed};
@ -145,6 +145,7 @@ use style::values::{CustomIdent, KeyframesName};
use style::values::animated::{Animate, Procedure, ToAnimatedZero};
use style::values::computed::{Context, ToComputedValue};
use style::values::distance::ComputeSquaredDistance;
use style::values::specified;
use style_traits::{PARSING_MODE_DEFAULT, ToCss};
use super::error_reporter::ErrorReporter;
use super::stylesheet_loader::StylesheetLoader;
@ -4206,3 +4207,66 @@ pub unsafe extern "C" fn Servo_SelectorList_Parse(
pub unsafe extern "C" fn Servo_SelectorList_Drop(list: RawServoSelectorListOwned) {
let _ = list.into_box::<::selectors::SelectorList<SelectorImpl>>();
}
fn parse_color(value: &str) -> Result<specified::Color, ()> {
let mut input = ParserInput::new(value);
let mut parser = Parser::new(&mut input);
parser.parse_entirely(specified::Color::parse_color).map_err(|_| ())
}
#[no_mangle]
pub extern "C" fn Servo_IsValidCSSColor(
value: *const nsAString,
) -> bool {
let value = unsafe { (*value).to_string() };
parse_color(&value).is_ok()
}
#[no_mangle]
pub extern "C" fn Servo_ComputeColor(
raw_data: RawServoStyleSetBorrowedOrNull,
current_color: structs::nscolor,
value: *const nsAString,
result_color: *mut structs::nscolor,
) -> bool {
use style::gecko;
let current_color = gecko::values::convert_nscolor_to_rgba(current_color);
let value = unsafe { (*value).to_string() };
let result_color = unsafe { result_color.as_mut().unwrap() };
match parse_color(&value) {
Ok(specified_color) => {
let computed_color = match raw_data {
Some(raw_data) => {
let data = PerDocumentStyleData::from_ffi(raw_data).borrow();
let metrics = get_metrics_provider_for_product();
let mut conditions = Default::default();
let context = create_context(
&data,
&metrics,
data.stylist.device().default_computed_values(),
/* parent_style = */ None,
/* pseudo = */ None,
/* for_smil_animation = */ false,
&mut conditions,
);
specified_color.to_computed_color(Some(&context))
}
None => {
specified_color.to_computed_color(None)
}
};
match computed_color {
Some(computed_color) => {
let rgba = computed_color.to_rgba(current_color);
*result_color = gecko::values::convert_rgba_to_nscolor(&rgba);
true
}
None => false,
}
}
Err(_) => false,
}
}