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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::ops::Deref;
use std::rc::Rc;
use std::str::FromStr;
use data_url::mime::Mime;
use dom_struct::dom_struct;
use js::rust::{HandleObject, MutableHandleValue};
use script_bindings::record::Record;
use crate::dom::bindings::cell::DomRefCell;
use crate::dom::bindings::codegen::Bindings::ClipboardBinding::{
ClipboardItemMethods, ClipboardItemOptions, PresentationStyle,
};
use crate::dom::bindings::error::{Error, Fallible};
use crate::dom::bindings::frozenarray::CachedFrozenArray;
use crate::dom::bindings::reflector::{Reflector, reflect_dom_object_with_proto};
use crate::dom::bindings::root::DomRoot;
use crate::dom::bindings::str::DOMString;
use crate::dom::promise::Promise;
use crate::dom::window::Window;
use crate::script_runtime::{CanGc, JSContext};
/// <https://w3c.github.io/clipboard-apis/#web-custom-format>
const CUSTOM_FORMAT_PREFIX: &str = "web ";
/// <https://w3c.github.io/clipboard-apis/#representation>
#[derive(JSTraceable, MallocSizeOf)]
struct Representation {
#[no_trace]
#[ignore_malloc_size_of = "Extern type"]
mime_type: Mime,
is_custom: bool,
#[ignore_malloc_size_of = "Rc is hard"]
data: Rc<Promise>,
}
#[dom_struct]
pub(crate) struct ClipboardItem {
reflector_: Reflector,
representations: DomRefCell<Vec<Representation>>,
presentation_style: DomRefCell<PresentationStyle>,
#[ignore_malloc_size_of = "mozjs"]
frozen_types: CachedFrozenArray,
}
impl ClipboardItem {
fn new_inherited() -> ClipboardItem {
ClipboardItem {
reflector_: Reflector::new(),
representations: Default::default(),
presentation_style: Default::default(),
frozen_types: CachedFrozenArray::new(),
}
}
fn new(window: &Window, proto: Option<HandleObject>, can_gc: CanGc) -> DomRoot<ClipboardItem> {
reflect_dom_object_with_proto(
Box::new(ClipboardItem::new_inherited()),
window,
proto,
can_gc,
)
}
}
impl ClipboardItemMethods<crate::DomTypeHolder> for ClipboardItem {
/// <https://w3c.github.io/clipboard-apis/#dom-clipboarditem-clipboarditem>
fn Constructor(
global: &Window,
proto: Option<HandleObject>,
can_gc: CanGc,
items: Record<DOMString, Rc<Promise>>,
options: &ClipboardItemOptions,
) -> Fallible<DomRoot<ClipboardItem>> {
// Step 1 If items is empty, then throw a TypeError.
if items.is_empty() {
return Err(Error::Type(String::from("No item provided")));
}
// Step 2 If options is empty, then set options["presentationStyle"] = "unspecified".
// NOTE: This is done inside bindings
// Step 3 Set this's clipboard item to a new clipboard item.
let clipboard_item = ClipboardItem::new(global, proto, can_gc);
// Step 4 Set this's clipboard item's presentation style to options["presentationStyle"].
*clipboard_item.presentation_style.borrow_mut() = options.presentationStyle;
// Step 6 For each (key, value) in items:
for (key, value) in items.deref() {
// Step 6.2 Let isCustom be false.
// Step 6.3 If key starts with `"web "` prefix, then
// Step 6.3.1 Remove `"web "` prefix and assign the remaining string to key.
let (key, is_custom) = match key.strip_prefix(CUSTOM_FORMAT_PREFIX) {
None => (key.str(), false),
// Step 6.3.2 Set isCustom true
Some(stripped) => (stripped, true),
};
// Step 6.5 Let mimeType be the result of parsing a MIME type given key.
// Step 6.6 If mimeType is failure, then throw a TypeError.
let mime_type =
Mime::from_str(key).map_err(|_| Error::Type(String::from("Invalid mime type")))?;
// Step 6.7 If this's clipboard item's list of representations contains a representation
// whose MIME type is mimeType and whose [representation/isCustom] is isCustom, then throw a TypeError.
if clipboard_item
.representations
.borrow()
.iter()
.any(|representation| {
representation.mime_type == mime_type && representation.is_custom == is_custom
})
{
return Err(Error::Type(String::from("Tried to add a duplicate mime")));
}
// Step 6.1 Let representation be a new representation.
// Step 6.4 Set representation’s isCustom flag to isCustom.
// Step 6.8 Set representation’s MIME type to mimeType.
// Step 6.9 Set representation’s data to value.
let representation = Representation {
mime_type,
is_custom,
data: value.clone(),
};
// Step 6.10 Append representation to this's clipboard item's list of representations.
clipboard_item
.representations
.borrow_mut()
.push(representation);
}
// NOTE: The steps for creating a frozen array from the list of mimeType are done in the Types() method
Ok(clipboard_item)
}
/// <https://w3c.github.io/clipboard-apis/#dom-clipboarditem-presentationstyle>
fn PresentationStyle(&self) -> PresentationStyle {
*self.presentation_style.borrow()
}
/// <https://w3c.github.io/clipboard-apis/#dom-clipboarditem-types>
fn Types(&self, cx: JSContext, can_gc: CanGc, retval: MutableHandleValue) {
self.frozen_types.get_or_init(
|| {
// Step 5 Let types be a list of DOMString.
let mut types = Vec::new();
self.representations
.borrow()
.iter()
.for_each(|representation| {
// Step 6.11 Let mimeTypeString be the result of serializing a MIME type with mimeType.
let mime_type_string = representation.mime_type.to_string();
// Step 6.12 If isCustom is true, prefix mimeTypeString with `"web "`.
let mime_type_string = if representation.is_custom {
format!("{}{}", CUSTOM_FORMAT_PREFIX, mime_type_string)
} else {
mime_type_string
};
// Step 6.13 Add mimeTypeString to types.
types.push(DOMString::from(mime_type_string));
});
types
},
cx,
retval,
can_gc,
);
}
}
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