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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 http://mozilla.org/MPL/2.0/. */
#![allow(unsafe_code)]
use app_units::Au;
use cssparser::RGBA;
use gecko_bindings::structs::nsStyleCoord;
use gecko_bindings::structs::{NS_RADIUS_CLOSEST_SIDE, NS_RADIUS_FARTHEST_SIDE};
use gecko_bindings::sugar::ns_style_coord::{CoordDataValue, CoordData, CoordDataMut};
use std::cmp::max;
use values::computed::Angle;
use values::computed::basic_shape::ShapeRadius;
use values::computed::{LengthOrPercentage, LengthOrPercentageOrAuto, LengthOrPercentageOrNone};
pub trait StyleCoordHelpers {
fn set<T: GeckoStyleCoordConvertible>(&mut self, val: T);
}
impl StyleCoordHelpers for nsStyleCoord {
#[inline]
fn set<T: GeckoStyleCoordConvertible>(&mut self, val: T) {
val.to_gecko_style_coord(self);
}
}
pub trait GeckoStyleCoordConvertible : Sized {
fn to_gecko_style_coord<T: CoordDataMut>(&self, coord: &mut T);
fn from_gecko_style_coord<T: CoordData>(coord: &T) -> Option<Self>;
}
impl GeckoStyleCoordConvertible for LengthOrPercentage {
fn to_gecko_style_coord<T: CoordDataMut>(&self, coord: &mut T) {
let value = match *self {
LengthOrPercentage::Length(au) => CoordDataValue::Coord(au.0),
LengthOrPercentage::Percentage(p) => CoordDataValue::Percent(p),
LengthOrPercentage::Calc(calc) => CoordDataValue::Calc(calc.into()),
};
coord.set_value(value);
}
fn from_gecko_style_coord<T: CoordData>(coord: &T) -> Option<Self> {
match coord.as_value() {
CoordDataValue::Coord(coord) => Some(LengthOrPercentage::Length(Au(coord))),
CoordDataValue::Percent(p) => Some(LengthOrPercentage::Percentage(p)),
CoordDataValue::Calc(calc) => Some(LengthOrPercentage::Calc(calc.into())),
_ => None,
}
}
}
impl GeckoStyleCoordConvertible for LengthOrPercentageOrAuto {
fn to_gecko_style_coord<T: CoordDataMut>(&self, coord: &mut T) {
let value = match *self {
LengthOrPercentageOrAuto::Length(au) => CoordDataValue::Coord(au.0),
LengthOrPercentageOrAuto::Percentage(p) => CoordDataValue::Percent(p),
LengthOrPercentageOrAuto::Auto => CoordDataValue::Auto,
LengthOrPercentageOrAuto::Calc(calc) => CoordDataValue::Calc(calc.into()),
};
coord.set_value(value);
}
fn from_gecko_style_coord<T: CoordData>(coord: &T) -> Option<Self> {
match coord.as_value() {
CoordDataValue::Coord(coord) => Some(LengthOrPercentageOrAuto::Length(Au(coord))),
CoordDataValue::Percent(p) => Some(LengthOrPercentageOrAuto::Percentage(p)),
CoordDataValue::Auto => Some(LengthOrPercentageOrAuto::Auto),
CoordDataValue::Calc(calc) => Some(LengthOrPercentageOrAuto::Calc(calc.into())),
_ => None,
}
}
}
impl GeckoStyleCoordConvertible for LengthOrPercentageOrNone {
fn to_gecko_style_coord<T: CoordDataMut>(&self, coord: &mut T) {
let value = match *self {
LengthOrPercentageOrNone::Length(au) => CoordDataValue::Coord(au.0),
LengthOrPercentageOrNone::Percentage(p) => CoordDataValue::Percent(p),
LengthOrPercentageOrNone::None => CoordDataValue::None,
LengthOrPercentageOrNone::Calc(calc) => CoordDataValue::Calc(calc.into()),
};
coord.set_value(value);
}
fn from_gecko_style_coord<T: CoordData>(coord: &T) -> Option<Self> {
match coord.as_value() {
CoordDataValue::Coord(coord) => Some(LengthOrPercentageOrNone::Length(Au(coord))),
CoordDataValue::Percent(p) => Some(LengthOrPercentageOrNone::Percentage(p)),
CoordDataValue::None => Some(LengthOrPercentageOrNone::None),
CoordDataValue::Calc(calc) => Some(LengthOrPercentageOrNone::Calc(calc.into())),
_ => None,
}
}
}
impl GeckoStyleCoordConvertible for ShapeRadius {
fn to_gecko_style_coord<T: CoordDataMut>(&self, coord: &mut T) {
match *self {
ShapeRadius::ClosestSide => {
coord.set_value(CoordDataValue::Enumerated(NS_RADIUS_CLOSEST_SIDE))
}
ShapeRadius::FarthestSide => {
coord.set_value(CoordDataValue::Enumerated(NS_RADIUS_FARTHEST_SIDE))
}
ShapeRadius::Length(lop) => lop.to_gecko_style_coord(coord),
}
}
fn from_gecko_style_coord<T: CoordData>(coord: &T) -> Option<Self> {
match coord.as_value() {
CoordDataValue::Enumerated(NS_RADIUS_CLOSEST_SIDE) => Some(ShapeRadius::ClosestSide),
CoordDataValue::Enumerated(NS_RADIUS_FARTHEST_SIDE) => Some(ShapeRadius::FarthestSide),
_ => LengthOrPercentage::from_gecko_style_coord(coord).map(ShapeRadius::Length),
}
}
}
impl<T: GeckoStyleCoordConvertible> GeckoStyleCoordConvertible for Option<T> {
fn to_gecko_style_coord<U: CoordDataMut>(&self, coord: &mut U) {
if let Some(ref me) = *self {
me.to_gecko_style_coord(coord);
} else {
coord.set_value(CoordDataValue::None);
}
}
fn from_gecko_style_coord<U: CoordData>(coord: &U) -> Option<Self> {
Some(T::from_gecko_style_coord(coord))
}
}
impl GeckoStyleCoordConvertible for Angle {
fn to_gecko_style_coord<T: CoordDataMut>(&self, coord: &mut T) {
coord.set_value(CoordDataValue::Radian(self.radians()))
}
fn from_gecko_style_coord<T: CoordData>(coord: &T) -> Option<Self> {
if let CoordDataValue::Radian(r) = coord.as_value() {
Some(Angle::from_radians(r))
// XXXManishearth should this handle Degree too?
} else {
None
}
}
}
pub fn convert_rgba_to_nscolor(rgba: &RGBA) -> u32 {
(((rgba.alpha * 255.0).round() as u32) << 24) |
(((rgba.blue * 255.0).round() as u32) << 16) |
(((rgba.green * 255.0).round() as u32) << 8) |
((rgba.red * 255.0).round() as u32)
}
pub fn convert_nscolor_to_rgba(color: u32) -> RGBA {
RGBA {
red: ((color & 0xff) as f32) / 255.0,
green: (((color >> 8) & 0xff) as f32) / 255.0,
blue: (((color >> 16) & 0xff) as f32) / 255.0,
alpha: (((color >> 24) & 0xff) as f32) / 255.0,
}
}
#[inline]
pub fn round_border_to_device_pixels(width: Au, au_per_device_px: Au) -> Au {
// Round width down to the nearest device pixel, but any non-zero value that
// would round down to zero is clamped to 1 device pixel. Used for storing
// computed values of border-*-width and outline-width.
if width == Au(0) {
Au(0)
} else {
max(au_per_device_px, Au(width.0 / au_per_device_px.0 * au_per_device_px.0))
}
}
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