blob: 5da54d23e035b38b2520132d5e0eed92a881af84 [file] [log] [blame]
/*
* Copyright (C) 2015 Canon Inc.
* Copyright (C) 2015 Igalia
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// @conditional=ENABLE(STREAMS_API)
function initializeWritableStream(underlyingSink, strategy)
{
"use strict";
if (underlyingSink === @undefined)
underlyingSink = { };
if (strategy === @undefined)
strategy = { highWaterMark: 0, size: function() { return 1; } };
if (!@isObject(underlyingSink))
@throwTypeError("WritableStream constructor takes an object as first argument");
if (!@isObject(strategy))
@throwTypeError("WritableStream constructor takes an object as second argument, if any");
@putByIdDirectPrivate(this, "underlyingSink", underlyingSink);
@putByIdDirectPrivate(this, "closedPromiseCapability", @newPromiseCapability(@Promise));
@putByIdDirectPrivate(this, "readyPromiseCapability", { @promise: @Promise.@resolve() });
@putByIdDirectPrivate(this, "queue", @newQueue());
@putByIdDirectPrivate(this, "state", @streamWritable);
@putByIdDirectPrivate(this, "started", false);
@putByIdDirectPrivate(this, "writing", false);
@putByIdDirectPrivate(this, "strategy", @validateAndNormalizeQueuingStrategy(strategy.size, strategy.highWaterMark));
@syncWritableStreamStateWithQueue(this);
const errorFunction = (e) => {
@errorWritableStream(this, e);
};
@putByIdDirectPrivate(this, "startedPromise", @promiseInvokeOrNoopNoCatch(underlyingSink, "start", [errorFunction]));
@getByIdDirectPrivate(this, "startedPromise").@then(() => {
@putByIdDirectPrivate(this, "started", true);
@putByIdDirectPrivate(this, "startedPromise", @undefined);
}, errorFunction);
return this;
}
function abort(reason)
{
"use strict";
if (!@isWritableStream(this))
return @Promise.@reject(new @TypeError("The WritableStream.abort method can only be used on instances of WritableStream"));
const state = @getByIdDirectPrivate(this, "state");
if (state === @streamClosed)
return @Promise.@resolve();
if (state === @streamErrored)
return @Promise.@reject(@getByIdDirectPrivate(this, "storedError"));
@errorWritableStream(this, reason);
return @promiseInvokeOrFallbackOrNoop(@getByIdDirectPrivate(this, "underlyingSink"), "abort", [reason], "close", []).@then(function() { });
}
function close()
{
"use strict";
if (!@isWritableStream(this))
return @Promise.@reject(new @TypeError("The WritableStream.close method can only be used on instances of WritableStream"));
const state = @getByIdDirectPrivate(this, "state");
if (state === @streamClosed || state === @streamClosing)
return @Promise.@reject(new @TypeError("Cannot close a WritableString that is closed or closing"));
if (state === @streamErrored)
return @Promise.@reject(@getByIdDirectPrivate(this, "storedError"));
if (state === @streamWaiting)
@getByIdDirectPrivate(this, "readyPromiseCapability").@resolve.@call();
@putByIdDirectPrivate(this, "state", @streamClosing);
@enqueueValueWithSize(@getByIdDirectPrivate(this, "queue"), "close", 0);
@callOrScheduleWritableStreamAdvanceQueue(this);
return @getByIdDirectPrivate(this, "closedPromiseCapability").@promise;
}
function write(chunk)
{
"use strict";
if (!@isWritableStream(this))
return @Promise.@reject(new @TypeError("The WritableStream.write method can only be used on instances of WritableStream"));
const state = @getByIdDirectPrivate(this, "state");
if (state === @streamClosed || state === @streamClosing)
return @Promise.@reject(new @TypeError("Cannot write on a WritableString that is closed or closing"));
if (state === @streamErrored)
return @Promise.@reject(this.@storedError);
@assert(state === @streamWritable || state === @streamWaiting);
let chunkSize = 1;
if (@getByIdDirectPrivate(this, "strategy").size !== @undefined) {
try {
chunkSize = @getByIdDirectPrivate(this, "strategy").size.@call(@undefined, chunk);
} catch(e) {
@errorWritableStream(this, e);
return @Promise.@reject(e);
}
}
const promiseCapability = @newPromiseCapability(@Promise);
try {
@enqueueValueWithSize(@getByIdDirectPrivate(this, "queue"), { promiseCapability: promiseCapability, chunk: chunk }, chunkSize);
} catch (e) {
@errorWritableStream(this, e);
return @Promise.@reject(e);
}
@syncWritableStreamStateWithQueue(this);
@callOrScheduleWritableStreamAdvanceQueue(this);
return promiseCapability.@promise;
}
@getter
function closed()
{
"use strict";
if (!@isWritableStream(this))
return @Promise.@reject(new @TypeError("The WritableStream.closed getter can only be used on instances of WritableStream"));
return @getByIdDirectPrivate(this, "closedPromiseCapability").@promise;
}
@getter
function ready()
{
"use strict";
if (!@isWritableStream(this))
return @Promise.@reject(new @TypeError("The WritableStream.ready getter can only be used on instances of WritableStream"));
return @getByIdDirectPrivate(this, "readyPromiseCapability").@promise;
}
@getter
function state()
{
"use strict";
if (!@isWritableStream(this))
@throwTypeError("The WritableStream.state getter can only be used on instances of WritableStream");
switch(@getByIdDirectPrivate(this, "state")) {
case @streamClosed:
return "closed";
case @streamClosing:
return "closing";
case @streamErrored:
return "errored";
case @streamWaiting:
return "waiting";
case @streamWritable:
return "writable";
}
@assert(false);
}