servo/components/style/gecko_conversions.rs
2016-07-19 11:29:13 +05:30

36 lines
1.3 KiB
Rust

/* 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 http://mozilla.org/MPL/2.0/. */
//! This module contains conversion helpers between Servo and Gecko types
//! Ideally, it would be in geckolib itself, but coherence
//! forces us to keep the traits and implementations here
use app_units::Au;
use gecko_bindings::structs::nsStyleCoord_CalcValue;
use values::computed::CalcLengthOrPercentage;
impl From<CalcLengthOrPercentage> for nsStyleCoord_CalcValue {
fn from(other: CalcLengthOrPercentage) -> nsStyleCoord_CalcValue {
let has_percentage = other.percentage.is_some();
nsStyleCoord_CalcValue {
mLength: other.length.map_or(0, |l| l.0),
mPercent: other.percentage.unwrap_or(0.0),
mHasPercent: has_percentage,
}
}
}
impl From<nsStyleCoord_CalcValue> for CalcLengthOrPercentage {
fn from(other: nsStyleCoord_CalcValue) -> CalcLengthOrPercentage {
let percentage = if other.mHasPercent {
Some(other.mPercent)
} else {
None
};
CalcLengthOrPercentage {
length: Some(Au(other.mLength)),
percentage: percentage,
}
}
}