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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 http://mozilla.org/MPL/2.0/. */
use dom::domexception::DOMErrorName;
use dom::filereader::{FileReader, TrustedFileReader, GenerationId, ReadMetaData};
use script_runtime::{CommonScriptMsg, ScriptThreadEventCategory, ScriptChan};
use std::sync::Arc;
use task::{TaskBox, TaskCanceller};
use task_source::TaskSource;
#[derive(JSTraceable)]
pub struct FileReadingTaskSource(pub Box<ScriptChan + Send + 'static>);
impl Clone for FileReadingTaskSource {
fn clone(&self) -> FileReadingTaskSource {
FileReadingTaskSource(self.0.clone())
}
}
impl TaskSource for FileReadingTaskSource {
fn queue_with_canceller<T>(
&self,
msg: Box<T>,
canceller: &TaskCanceller,
) -> Result<(), ()>
where
T: TaskBox + 'static,
{
self.0.send(CommonScriptMsg::Task(
ScriptThreadEventCategory::FileRead,
canceller.wrap_task(msg),
))
}
}
impl TaskBox for FileReadingTask {
fn run_box(self: Box<Self>) {
self.handle_task();
}
}
#[allow(dead_code)]
pub enum FileReadingTask {
ProcessRead(TrustedFileReader, GenerationId),
ProcessReadData(TrustedFileReader, GenerationId),
ProcessReadError(TrustedFileReader, GenerationId, DOMErrorName),
ProcessReadEOF(TrustedFileReader, GenerationId, ReadMetaData, Arc<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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