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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 https://mozilla.org/MPL/2.0/. */
use std::cell::Cell;
use std::vec::Vec;
use dom_struct::dom_struct;
use crate::dom::bindings::cell::DomRefCell;
use crate::dom::bindings::codegen::Bindings::ImageBitmapBinding::ImageBitmapMethods;
use crate::dom::bindings::error::Fallible;
use crate::dom::bindings::reflector::{Reflector, reflect_dom_object};
use crate::dom::bindings::root::DomRoot;
use crate::dom::globalscope::GlobalScope;
use crate::script_runtime::CanGc;
#[dom_struct]
pub(crate) struct ImageBitmap {
reflector_: Reflector,
width: u32,
height: u32,
/// The actual pixel data of the bitmap
///
/// If this is `None`, then the bitmap data has been released by calling
/// [`close`](https://html.spec.whatwg.org/multipage/#dom-imagebitmap-close)
bitmap_data: DomRefCell<Option<Vec<u8>>>,
origin_clean: Cell<bool>,
}
impl ImageBitmap {
fn new_inherited(width_arg: u32, height_arg: u32) -> ImageBitmap {
ImageBitmap {
reflector_: Reflector::new(),
width: width_arg,
height: height_arg,
bitmap_data: DomRefCell::new(Some(vec![])),
origin_clean: Cell::new(true),
}
}
#[allow(dead_code)]
pub(crate) fn new(
global: &GlobalScope,
width: u32,
height: u32,
can_gc: CanGc,
) -> Fallible<DomRoot<ImageBitmap>> {
//assigning to a variable the return object of new_inherited
let imagebitmap = Box::new(ImageBitmap::new_inherited(width, height));
Ok(reflect_dom_object(imagebitmap, global, can_gc))
}
pub(crate) fn set_bitmap_data(&self, data: Vec<u8>) {
*self.bitmap_data.borrow_mut() = Some(data);
}
pub(crate) fn set_origin_clean(&self, origin_is_clean: bool) {
self.origin_clean.set(origin_is_clean);
}
/// Return the value of the [`[[Detached]]`](https://html.spec.whatwg.org/multipage/#detached)
/// internal slot
fn is_detached(&self) -> bool {
self.bitmap_data.borrow().is_none()
}
}
impl ImageBitmapMethods<crate::DomTypeHolder> for ImageBitmap {
/// <https://html.spec.whatwg.org/multipage/#dom-imagebitmap-height>
fn Height(&self) -> u32 {
// Step 1. If this's [[Detached]] internal slot's value is true, then return 0.
if self.is_detached() {
return 0;
}
// Step 2. Return this's height, in CSS pixels.
self.height
}
/// <https://html.spec.whatwg.org/multipage/#dom-imagebitmap-width>
fn Width(&self) -> u32 {
// Step 1. If this's [[Detached]] internal slot's value is true, then return 0.
if self.is_detached() {
return 0;
}
// Step 2. Return this's width, in CSS pixels.
self.width
}
/// <https://html.spec.whatwg.org/multipage/#dom-imagebitmap-close>
fn Close(&self) {
// Step 1. Set this's [[Detached]] internal slot value to true.
// Step 2. Unset this's bitmap data.
// NOTE: The existence of the bitmap data is the internal slot in our implementation
self.bitmap_data.borrow_mut().take();
}
}
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