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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 msg::constellation_msg::PipelineId;
use crate::dom::domexception::DOMErrorName;
use crate::dom::filereader::{FileReader, GenerationId, ReadMetaData, TrustedFileReader};
use crate::script_runtime::{CommonScriptMsg, ScriptChan, ScriptThreadEventCategory};
use crate::task::{TaskCanceller, TaskOnce};
use crate::task_source::{TaskSource, TaskSourceName};
#[derive(JSTraceable)]
pub struct FileReadingTaskSource(
pub Box<dyn ScriptChan + Send + 'static>,
#[no_trace] pub PipelineId,
);
impl Clone for FileReadingTaskSource {
fn clone(&self) -> FileReadingTaskSource {
FileReadingTaskSource(self.0.clone(), self.1)
}
}
impl TaskSource for FileReadingTaskSource {
const NAME: TaskSourceName = TaskSourceName::FileReading;
fn queue_with_canceller<T>(&self, task: T, canceller: &TaskCanceller) -> Result<(), ()>
where
T: TaskOnce + 'static,
{
self.0.send(CommonScriptMsg::Task(
ScriptThreadEventCategory::FileRead,
Box::new(canceller.wrap_task(task)),
Some(self.1),
FileReadingTaskSource::NAME,
))
}
}
impl TaskOnce for FileReadingTask {
fn run_once(self) {
self.handle_task();
}
}
#[allow(dead_code)]
pub enum FileReadingTask {
ProcessRead(TrustedFileReader, GenerationId),
ProcessReadData(TrustedFileReader, GenerationId),
ProcessReadError(TrustedFileReader, GenerationId, DOMErrorName),
ProcessReadEOF(TrustedFileReader, GenerationId, ReadMetaData, Vec<u8>),
}
impl FileReadingTask {
pub fn handle_task(self) {
use self::FileReadingTask::*;
match self {
ProcessRead(reader, gen_id) => FileReader::process_read(reader, gen_id),
ProcessReadData(reader, gen_id) => FileReader::process_read_data(reader, gen_id),
ProcessReadError(reader, gen_id, error) => {
FileReader::process_read_error(reader, gen_id, error)
},
ProcessReadEOF(reader, gen_id, metadata, blob_contents) => {
FileReader::process_read_eof(reader, gen_id, metadata, blob_contents)
},
}
}
}
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