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-rw-r--r--servo/components/style/gecko/values.rs72
1 files changed, 72 insertions, 0 deletions
diff --git a/servo/components/style/gecko/values.rs b/servo/components/style/gecko/values.rs
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+++ b/servo/components/style/gecko/values.rs
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+#![allow(unsafe_code)]
+
+//! Different kind of helpers to interact with Gecko values.
+
+use crate::color::{AbsoluteColor, ColorSpace};
+use crate::counter_style::{Symbol, Symbols};
+use crate::gecko_bindings::bindings;
+use crate::gecko_bindings::structs::CounterStylePtr;
+use crate::values::generics::CounterStyle;
+use crate::values::Either;
+use crate::Atom;
+
+/// Convert a color value to `nscolor`.
+pub fn convert_absolute_color_to_nscolor(color: &AbsoluteColor) -> u32 {
+ let srgb = color.to_color_space(ColorSpace::Srgb);
+ u32::from_le_bytes([
+ (srgb.components.0 * 255.0).round() as u8,
+ (srgb.components.1 * 255.0).round() as u8,
+ (srgb.components.2 * 255.0).round() as u8,
+ (srgb.alpha * 255.0).round() as u8,
+ ])
+}
+
+/// Convert a given `nscolor` to a Servo AbsoluteColor value.
+pub fn convert_nscolor_to_absolute_color(color: u32) -> AbsoluteColor {
+ let [r, g, b, a] = color.to_le_bytes();
+ AbsoluteColor::srgb(
+ r as f32 / 255.0,
+ g as f32 / 255.0,
+ b as f32 / 255.0,
+ a as f32 / 255.0,
+ )
+}
+
+impl CounterStyle {
+ /// Convert this counter style to a Gecko CounterStylePtr.
+ #[inline]
+ pub fn to_gecko_value(&self, gecko_value: &mut CounterStylePtr) {
+ unsafe { bindings::Gecko_CounterStyle_ToPtr(self, gecko_value) }
+ }
+
+ /// Convert Gecko CounterStylePtr to CounterStyle or String.
+ pub fn from_gecko_value(gecko_value: &CounterStylePtr) -> Either<Self, String> {
+ use crate::values::CustomIdent;
+
+ let name = unsafe { bindings::Gecko_CounterStyle_GetName(gecko_value) };
+ if !name.is_null() {
+ let name = unsafe { Atom::from_raw(name) };
+ debug_assert_ne!(name, atom!("none"));
+ Either::First(CounterStyle::Name(CustomIdent(name)))
+ } else {
+ let anonymous =
+ unsafe { bindings::Gecko_CounterStyle_GetAnonymous(gecko_value).as_ref() }.unwrap();
+ let symbols = &anonymous.mSymbols;
+ if anonymous.mSingleString {
+ debug_assert_eq!(symbols.len(), 1);
+ Either::Second(symbols[0].to_string())
+ } else {
+ let symbol_type = anonymous.mSymbolsType;
+ let symbols = symbols
+ .iter()
+ .map(|gecko_symbol| Symbol::String(gecko_symbol.to_string().into()))
+ .collect();
+ Either::First(CounterStyle::Symbols(symbol_type, Symbols(symbols)))
+ }
+ }
+ }
+}