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6b75078503
This should make it somewhat easier to experiment with alternative representations in the future. To reduce churn, this commit leaves the String field public, though. Also, this will allow us to use the default String type to represent the IDL USVString type, which explicitly forbids unpaired surrogates, ans as such is a better match to the Rust String type.
88 lines
3.1 KiB
Rust
88 lines
3.1 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 http://mozilla.org/MPL/2.0/. */
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use canvas_traits::{CanvasGradientStop, FillOrStrokeStyle, LinearGradientStyle, RadialGradientStyle};
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use dom::bindings::cell::DOMRefCell;
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use dom::bindings::codegen::Bindings::CanvasGradientBinding;
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use dom::bindings::codegen::Bindings::CanvasGradientBinding::CanvasGradientMethods;
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use dom::bindings::error::{Error, ErrorResult};
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use dom::bindings::global::GlobalRef;
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use dom::bindings::js::Root;
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use dom::bindings::num::Finite;
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use dom::bindings::reflector::{Reflector, reflect_dom_object};
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use dom::canvasrenderingcontext2d::parse_color;
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use util::str::DOMString;
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// https://html.spec.whatwg.org/multipage/#canvasgradient
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#[dom_struct]
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pub struct CanvasGradient {
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reflector_: Reflector,
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style: CanvasGradientStyle,
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stops: DOMRefCell<Vec<CanvasGradientStop>>,
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}
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#[derive(JSTraceable, Clone, HeapSizeOf)]
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pub enum CanvasGradientStyle {
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Linear(LinearGradientStyle),
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Radial(RadialGradientStyle),
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}
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impl CanvasGradient {
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fn new_inherited(style: CanvasGradientStyle) -> CanvasGradient {
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CanvasGradient {
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reflector_: Reflector::new(),
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style: style,
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stops: DOMRefCell::new(Vec::new()),
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}
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}
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pub fn new(global: GlobalRef, style: CanvasGradientStyle) -> Root<CanvasGradient> {
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reflect_dom_object(box CanvasGradient::new_inherited(style),
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global, CanvasGradientBinding::Wrap)
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}
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}
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impl CanvasGradientMethods for CanvasGradient {
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// https://html.spec.whatwg.org/multipage/#dom-canvasgradient-addcolorstop
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fn AddColorStop(&self, offset: Finite<f64>, color: DOMString) -> ErrorResult {
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if *offset < 0f64 || *offset > 1f64 {
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return Err(Error::IndexSize);
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}
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let color = match parse_color(&color) {
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Ok(color) => color,
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_ => return Err(Error::Syntax)
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};
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self.stops.borrow_mut().push(CanvasGradientStop {
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offset: (*offset) as f64,
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color: color,
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});
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Ok(())
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}
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}
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pub trait ToFillOrStrokeStyle {
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fn to_fill_or_stroke_style(self) -> FillOrStrokeStyle;
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}
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impl<'a> ToFillOrStrokeStyle for &'a CanvasGradient {
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fn to_fill_or_stroke_style(self) -> FillOrStrokeStyle {
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let gradient_stops = self.stops.borrow().clone();
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match self.style {
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CanvasGradientStyle::Linear(ref gradient) => {
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FillOrStrokeStyle::LinearGradient(
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LinearGradientStyle::new(gradient.x0, gradient.y0,
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gradient.x1, gradient.y1,
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gradient_stops))
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},
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CanvasGradientStyle::Radial(ref gradient) => {
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FillOrStrokeStyle::RadialGradient(
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RadialGradientStyle::new(gradient.x0, gradient.y0, gradient.r0,
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gradient.x1, gradient.y1, gradient.r1,
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gradient_stops))
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}
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}
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}
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}
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