script/dom/
dompointreadonly.rs

1/* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
4
5use std::cell::Cell;
6
7use dom_struct::dom_struct;
8use js::context::JSContext;
9use js::rust::HandleObject;
10use rustc_hash::FxHashMap;
11use script_bindings::reflector::{Reflector, reflect_dom_object_with_proto_and_cx};
12use servo_base::id::{DomPointId, DomPointIndex};
13use servo_constellation_traits::DomPoint;
14
15use crate::dom::bindings::codegen::Bindings::DOMMatrixBinding::DOMMatrixInit;
16use crate::dom::bindings::codegen::Bindings::DOMPointBinding::DOMPointInit;
17use crate::dom::bindings::codegen::Bindings::DOMPointReadOnlyBinding::DOMPointReadOnlyMethods;
18use crate::dom::bindings::error::Fallible;
19use crate::dom::bindings::reflector::DomGlobal;
20use crate::dom::bindings::root::DomRoot;
21use crate::dom::bindings::serializable::Serializable;
22use crate::dom::bindings::structuredclone::StructuredData;
23use crate::dom::dommatrixreadonly::dommatrixinit_to_matrix;
24use crate::dom::globalscope::GlobalScope;
25use crate::dom::types::DOMPoint;
26use crate::script_runtime::CanGc;
27
28/// <http://dev.w3.org/fxtf/geometry/Overview.html#dompointreadonly>
29#[dom_struct]
30pub(crate) struct DOMPointReadOnly {
31    reflector_: Reflector,
32    x: Cell<f64>,
33    y: Cell<f64>,
34    z: Cell<f64>,
35    w: Cell<f64>,
36}
37
38impl DOMPointReadOnly {
39    pub(crate) fn new_inherited(x: f64, y: f64, z: f64, w: f64) -> DOMPointReadOnly {
40        DOMPointReadOnly {
41            x: Cell::new(x),
42            y: Cell::new(y),
43            z: Cell::new(z),
44            w: Cell::new(w),
45            reflector_: Reflector::new(),
46        }
47    }
48
49    pub(crate) fn new(
50        cx: &mut JSContext,
51        global: &GlobalScope,
52        x: f64,
53        y: f64,
54        z: f64,
55        w: f64,
56    ) -> DomRoot<DOMPointReadOnly> {
57        Self::new_with_proto(cx, global, None, x, y, z, w)
58    }
59
60    fn new_with_proto(
61        cx: &mut JSContext,
62        global: &GlobalScope,
63        proto: Option<HandleObject>,
64        x: f64,
65        y: f64,
66        z: f64,
67        w: f64,
68    ) -> DomRoot<DOMPointReadOnly> {
69        reflect_dom_object_with_proto_and_cx(
70            Box::new(DOMPointReadOnly::new_inherited(x, y, z, w)),
71            global,
72            proto,
73            cx,
74        )
75    }
76}
77
78impl DOMPointReadOnlyMethods<crate::DomTypeHolder> for DOMPointReadOnly {
79    /// <https://drafts.fxtf.org/geometry/#dom-dompoint-dompoint>
80    fn Constructor(
81        cx: &mut JSContext,
82        global: &GlobalScope,
83        proto: Option<HandleObject>,
84        x: f64,
85        y: f64,
86        z: f64,
87        w: f64,
88    ) -> Fallible<DomRoot<DOMPointReadOnly>> {
89        Ok(DOMPointReadOnly::new_with_proto(
90            cx, global, proto, x, y, z, w,
91        ))
92    }
93
94    /// <https://drafts.fxtf.org/geometry/#dom-dompointreadonly-frompoint>
95    fn FromPoint(cx: &mut JSContext, global: &GlobalScope, init: &DOMPointInit) -> DomRoot<Self> {
96        Self::new(cx, global, init.x, init.y, init.z, init.w)
97    }
98
99    /// <https://dev.w3.org/fxtf/geometry/Overview.html#dom-dompointreadonly-x>
100    fn X(&self) -> f64 {
101        self.x.get()
102    }
103
104    /// <https://dev.w3.org/fxtf/geometry/Overview.html#dom-dompointreadonly-y>
105    fn Y(&self) -> f64 {
106        self.y.get()
107    }
108
109    /// <https://dev.w3.org/fxtf/geometry/Overview.html#dom-dompointreadonly-z>
110    fn Z(&self) -> f64 {
111        self.z.get()
112    }
113
114    /// <https://dev.w3.org/fxtf/geometry/Overview.html#dom-dompointreadonly-w>
115    fn W(&self) -> f64 {
116        self.w.get()
117    }
118
119    /// <https://dev.w3.org/fxtf/geometry/Overview.html#dom-dompointreadonly-matrixtransform>
120    /// <https://drafts.fxtf.org/geometry/Overview.html#transform-a-point-with-a-matrix>
121    fn MatrixTransform(
122        &self,
123        cx: &mut JSContext,
124        matrix: &DOMMatrixInit,
125    ) -> Fallible<DomRoot<DOMPoint>> {
126        // Let matrixObject be the result of invoking create a DOMMatrix from the dictionary matrix.
127        let matrix_object = match dommatrixinit_to_matrix(matrix) {
128            Ok(converted) => converted,
129            Err(exception) => {
130                return Err(exception);
131            },
132        };
133        // Steps 1-4 of transforming a point with a matrix
134        let x = self.X();
135        let y = self.Y();
136        let z = self.Z();
137        let w = self.W();
138        // Steps 5-12 of transforming a point with a matrix
139        let m = &matrix_object.1;
140        let transformed_point = DOMPointInit {
141            x: m.m11 * x + m.m21 * y + m.m31 * z + m.m41 * w,
142            y: m.m12 * x + m.m22 * y + m.m32 * z + m.m42 * w,
143            z: m.m13 * x + m.m23 * y + m.m33 * z + m.m43 * w,
144            w: m.m14 * x + m.m24 * y + m.m34 * z + m.m44 * w,
145        };
146        // Return the result of invoking transform a point with a matrix, given the current point
147        // and matrixObject. The current point does not get modified.
148        Ok(DOMPoint::new_from_init(
149            cx,
150            &self.global(),
151            &transformed_point,
152        ))
153    }
154}
155
156#[expect(non_snake_case)]
157pub(crate) trait DOMPointWriteMethods {
158    fn SetX(&self, value: f64);
159    fn SetY(&self, value: f64);
160    fn SetZ(&self, value: f64);
161    fn SetW(&self, value: f64);
162}
163
164impl DOMPointWriteMethods for DOMPointReadOnly {
165    fn SetX(&self, value: f64) {
166        self.x.set(value);
167    }
168
169    fn SetY(&self, value: f64) {
170        self.y.set(value);
171    }
172
173    fn SetZ(&self, value: f64) {
174        self.z.set(value);
175    }
176
177    fn SetW(&self, value: f64) {
178        self.w.set(value);
179    }
180}
181
182impl Serializable for DOMPointReadOnly {
183    type Index = DomPointIndex;
184    type Data = DomPoint;
185
186    fn serialize(&self) -> Result<(DomPointId, Self::Data), ()> {
187        let serialized = DomPoint {
188            x: self.x.get(),
189            y: self.y.get(),
190            z: self.z.get(),
191            w: self.w.get(),
192        };
193        Ok((DomPointId::new(), serialized))
194    }
195
196    #[expect(unsafe_code)]
197    fn deserialize(
198        owner: &GlobalScope,
199        serialized: Self::Data,
200        _can_gc: CanGc,
201    ) -> Result<DomRoot<Self>, ()> {
202        // TODO: https://github.com/servo/servo/issues/44588
203        let mut cx = unsafe { script_bindings::script_runtime::temp_cx() };
204        Ok(Self::new(
205            &mut cx,
206            owner,
207            serialized.x,
208            serialized.y,
209            serialized.z,
210            serialized.w,
211        ))
212    }
213
214    fn serialized_storage<'a>(
215        data: StructuredData<'a, '_>,
216    ) -> &'a mut Option<FxHashMap<DomPointId, Self::Data>> {
217        match data {
218            StructuredData::Reader(r) => &mut r.points,
219            StructuredData::Writer(w) => &mut w.points,
220        }
221    }
222}
script/dom/dompointreadonly.rs

script/dom/
dompointreadonly.rs
