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https://github.com/mozilla/gecko-dev.git
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58bb0b25d9
Backed out changeset 04543b8ded50 (bug 477157) Backed out changeset 5df17ecbcaa1 (bug 477157) MANUAL PUSH: backout
85 lines
2.9 KiB
Rust
85 lines
2.9 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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#![allow(unsafe_code)]
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//! Different kind of helpers to interact with Gecko values.
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use crate::counter_style::{Symbol, Symbols};
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use crate::gecko_bindings::bindings;
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use crate::gecko_bindings::structs::CounterStylePtr;
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use crate::values::generics::CounterStyle;
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use crate::values::Either;
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use crate::Atom;
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use app_units::Au;
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use cssparser::RGBA;
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use std::cmp::max;
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/// Convert a given RGBA value to `nscolor`.
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pub fn convert_rgba_to_nscolor(rgba: &RGBA) -> u32 {
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((rgba.alpha as u32) << 24) |
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((rgba.blue as u32) << 16) |
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((rgba.green as u32) << 8) |
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(rgba.red as u32)
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}
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/// Convert a given `nscolor` to a Servo RGBA value.
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pub fn convert_nscolor_to_rgba(color: u32) -> RGBA {
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RGBA::new(
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(color & 0xff) as u8,
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(color >> 8 & 0xff) as u8,
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(color >> 16 & 0xff) as u8,
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(color >> 24 & 0xff) as u8,
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)
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}
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/// Round `width` down to the nearest device pixel, but any non-zero value that
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/// would round down to zero is clamped to 1 device pixel. Used for storing
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/// computed values of border-*-width and outline-width.
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#[inline]
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pub fn round_border_to_device_pixels(width: Au, au_per_device_px: Au) -> Au {
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if width == Au(0) {
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Au(0)
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} else {
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max(
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au_per_device_px,
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Au(width.0 / au_per_device_px.0 * au_per_device_px.0),
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)
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}
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}
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impl CounterStyle {
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/// Convert this counter style to a Gecko CounterStylePtr.
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#[inline]
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pub fn to_gecko_value(&self, gecko_value: &mut CounterStylePtr) {
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unsafe { bindings::Gecko_CounterStyle_ToPtr(self, gecko_value) }
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}
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/// Convert Gecko CounterStylePtr to CounterStyle or String.
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pub fn from_gecko_value(gecko_value: &CounterStylePtr) -> Either<Self, String> {
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use crate::values::CustomIdent;
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let name = unsafe { bindings::Gecko_CounterStyle_GetName(gecko_value) };
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if !name.is_null() {
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let name = unsafe { Atom::from_raw(name) };
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debug_assert_ne!(name, atom!("none"));
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Either::First(CounterStyle::Name(CustomIdent(name)))
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} else {
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let anonymous =
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unsafe { bindings::Gecko_CounterStyle_GetAnonymous(gecko_value).as_ref() }.unwrap();
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let symbols = &anonymous.mSymbols;
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if anonymous.mSingleString {
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debug_assert_eq!(symbols.len(), 1);
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Either::Second(symbols[0].to_string())
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} else {
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let symbol_type = anonymous.mSymbolsType;
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let symbols = symbols
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.iter()
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.map(|gecko_symbol| Symbol::String(gecko_symbol.to_string().into()))
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.collect();
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Either::First(CounterStyle::Symbols(symbol_type, Symbols(symbols)))
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}
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}
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}
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}
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