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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 crate::dom::bindings::codegen::Bindings::BlobBinding::BlobMethods;
use crate::dom::bindings::codegen::Bindings::FileReaderSyncBinding::{
FileReaderSyncBinding, FileReaderSyncMethods,
};
use crate::dom::bindings::error::{Error, Fallible};
use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
use crate::dom::bindings::root::DomRoot;
use crate::dom::bindings::str::DOMString;
use crate::dom::blob::Blob;
use crate::dom::filereader::FileReaderSharedFunctionality;
use crate::dom::globalscope::GlobalScope;
use crate::script_runtime::JSContext;
use dom_struct::dom_struct;
use js::jsapi::JSObject;
use js::typedarray::{ArrayBuffer, CreateWith};
use std::ptr;
use std::ptr::NonNull;
#[dom_struct]
pub struct FileReaderSync {
reflector: Reflector,
}
impl FileReaderSync {
pub fn new_inherited() -> FileReaderSync {
FileReaderSync {
reflector: Reflector::new(),
}
}
pub fn new(global: &GlobalScope) -> DomRoot<FileReaderSync> {
reflect_dom_object(
Box::new(FileReaderSync::new_inherited()),
global,
FileReaderSyncBinding::Wrap,
)
}
pub fn Constructor(global: &GlobalScope) -> Fallible<DomRoot<FileReaderSync>> {
Ok(FileReaderSync::new(global))
}
fn get_blob_bytes(blob: &Blob) -> Result<Vec<u8>, Error> {
blob.get_bytes().map_err(|_| Error::NotReadable)
}
}
impl FileReaderSyncMethods for FileReaderSync {
// https://w3c.github.io/FileAPI/#readAsBinaryStringSyncSection
fn ReadAsBinaryString(&self, blob: &Blob) -> Fallible<DOMString> {
// step 1
let blob_contents = FileReaderSync::get_blob_bytes(blob)?;
// step 2
Ok(DOMString::from(String::from_utf8_lossy(&blob_contents)))
}
// https://w3c.github.io/FileAPI/#readAsTextSync
fn ReadAsText(&self, blob: &Blob, label: Option<DOMString>) -> Fallible<DOMString> {
// step 1
let blob_contents = FileReaderSync::get_blob_bytes(blob)?;
// step 2
let blob_label = label.map(String::from);
let blob_type = String::from(blob.Type());
let output =
FileReaderSharedFunctionality::text_decode(&blob_contents, &blob_type, &blob_label);
Ok(output)
}
// https://w3c.github.io/FileAPI/#readAsDataURLSync-section
fn ReadAsDataURL(&self, blob: &Blob) -> Fallible<DOMString> {
// step 1
let blob_contents = FileReaderSync::get_blob_bytes(blob)?;
// step 2
let output =
FileReaderSharedFunctionality::dataurl_format(&blob_contents, blob.Type().to_string());
Ok(output)
}
#[allow(unsafe_code)]
// https://w3c.github.io/FileAPI/#readAsArrayBufferSyncSection
fn ReadAsArrayBuffer(&self, cx: JSContext, blob: &Blob) -> Fallible<NonNull<JSObject>> {
// step 1
let blob_contents = FileReaderSync::get_blob_bytes(blob)?;
// step 2
unsafe {
rooted!(in(*cx) let mut array_buffer = ptr::null_mut::<JSObject>());
assert!(ArrayBuffer::create(
*cx,
CreateWith::Slice(&blob_contents),
array_buffer.handle_mut()
)
.is_ok());
Ok(NonNull::new_unchecked(array_buffer.get()))
}
}
}
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