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dom/file/FileRequest.cpp@ac0c01689b40 (annotated)

dom/file/FileRequest.cpp

Thu, 15 Jan 2015 15:59:08 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 15 Jan 2015 15:59:08 +0100

branch

TOR_BUG_9701

changeset 10

ac0c01689b40

permissions

-rw-r--r--

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

michael@0	1	/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0	2	/* vim: set ts=2 et sw=2 tw=80: */
michael@0	3	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	4	* License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0	5	* You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	6
michael@0	7	#include "FileRequest.h"
michael@0	8
michael@0	9	#include "mozilla/EventDispatcher.h"
michael@0	10	#include "mozilla/dom/FileRequestBinding.h"
michael@0	11	#include "nsCxPusher.h"
michael@0	12	#include "nsError.h"
michael@0	13	#include "nsIDOMProgressEvent.h"
michael@0	14	#include "nsDOMClassInfoID.h"
michael@0	15	#include "FileHelper.h"
michael@0	16	#include "LockedFile.h"
michael@0	17
michael@0	18	using namespace mozilla;
michael@0	19
michael@0	20	USING_FILE_NAMESPACE
michael@0	21
michael@0	22	FileRequest::FileRequest(nsPIDOMWindow* aWindow)
michael@0	23	: DOMRequest(aWindow), mWrapAsDOMRequest(false)
michael@0	24	{
michael@0	25	NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
michael@0	26	}
michael@0	27
michael@0	28	FileRequest::~FileRequest()
michael@0	29	{
michael@0	30	NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
michael@0	31	}
michael@0	32
michael@0	33	// static
michael@0	34	already_AddRefed<FileRequest>
michael@0	35	FileRequest::Create(nsPIDOMWindow* aOwner, LockedFile* aLockedFile,
michael@0	36	bool aWrapAsDOMRequest)
michael@0	37	{
michael@0	38	NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
michael@0	39
michael@0	40	nsRefPtr<FileRequest> request = new FileRequest(aOwner);
michael@0	41	request->mLockedFile = aLockedFile;
michael@0	42	request->mWrapAsDOMRequest = aWrapAsDOMRequest;
michael@0	43
michael@0	44	return request.forget();
michael@0	45	}
michael@0	46
michael@0	47	nsresult
michael@0	48	FileRequest::PreHandleEvent(EventChainPreVisitor& aVisitor)
michael@0	49	{
michael@0	50	NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
michael@0	51
michael@0	52	aVisitor.mCanHandle = true;
michael@0	53	aVisitor.mParentTarget = mLockedFile;
michael@0	54	return NS_OK;
michael@0	55	}
michael@0	56
michael@0	57	nsresult
michael@0	58	FileRequest::NotifyHelperCompleted(FileHelper* aFileHelper)
michael@0	59	{
michael@0	60	NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
michael@0	61
michael@0	62	nsresult rv = aFileHelper->mResultCode;
michael@0	63
michael@0	64	// If the request failed then fire error event and return.
michael@0	65	if (NS_FAILED(rv)) {
michael@0	66	FireError(rv);
michael@0	67	return NS_OK;
michael@0	68	}
michael@0	69
michael@0	70	// Otherwise we need to get the result from the helper.
michael@0	71	nsIScriptContext* sc = GetContextForEventHandlers(&rv);
michael@0	72	NS_ENSURE_STATE(sc);
michael@0	73
michael@0	74	AutoJSContext cx;
michael@0	75	NS_ASSERTION(cx, "Failed to get a context!");
michael@0	76
michael@0	77	JS::Rooted<JS::Value> result(cx);
michael@0	78
michael@0	79	JS::Rooted<JSObject*> global(cx, sc->GetWindowProxy());
michael@0	80	NS_ASSERTION(global, "Failed to get global object!");
michael@0	81
michael@0	82	JSAutoCompartment ac(cx, global);
michael@0	83
michael@0	84	rv = aFileHelper->GetSuccessResult(cx, &result);
michael@0	85	if (NS_FAILED(rv)) {
michael@0	86	NS_WARNING("GetSuccessResult failed!");
michael@0	87	}
michael@0	88
michael@0	89	if (NS_SUCCEEDED(rv)) {
michael@0	90	FireSuccess(result);
michael@0	91	}
michael@0	92	else {
michael@0	93	FireError(rv);
michael@0	94	}
michael@0	95
michael@0	96	return NS_OK;
michael@0	97	}
michael@0	98
michael@0	99	NS_IMPL_CYCLE_COLLECTION_INHERITED(FileRequest, DOMRequest,
michael@0	100	mLockedFile)
michael@0	101
michael@0	102	NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(FileRequest)
michael@0	103	NS_INTERFACE_MAP_END_INHERITING(DOMRequest)
michael@0	104
michael@0	105	NS_IMPL_ADDREF_INHERITED(FileRequest, DOMRequest)
michael@0	106	NS_IMPL_RELEASE_INHERITED(FileRequest, DOMRequest)
michael@0	107
michael@0	108	// virtual
michael@0	109	JSObject*
michael@0	110	FileRequest::WrapObject(JSContext* aCx)
michael@0	111	{
michael@0	112	if (mWrapAsDOMRequest) {
michael@0	113	return DOMRequest::WrapObject(aCx);
michael@0	114	}
michael@0	115	return FileRequestBinding::Wrap(aCx, this);
michael@0	116	}
michael@0	117
michael@0	118	LockedFile*
michael@0	119	FileRequest::GetLockedFile() const
michael@0	120	{
michael@0	121	MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
michael@0	122	return mLockedFile;
michael@0	123	}
michael@0	124
michael@0	125	void
michael@0	126	FileRequest::FireProgressEvent(uint64_t aLoaded, uint64_t aTotal)
michael@0	127	{
michael@0	128	if (NS_FAILED(CheckInnerWindowCorrectness())) {
michael@0	129	return;
michael@0	130	}
michael@0	131
michael@0	132	nsCOMPtr<nsIDOMEvent> event;
michael@0	133	nsresult rv = NS_NewDOMProgressEvent(getter_AddRefs(event), this,
michael@0	134	nullptr, nullptr);
michael@0	135	if (NS_FAILED(rv)) {
michael@0	136	return;
michael@0	137	}
michael@0	138
michael@0	139	nsCOMPtr<nsIDOMProgressEvent> progress = do_QueryInterface(event);
michael@0	140	MOZ_ASSERT(progress);
michael@0	141	rv = progress->InitProgressEvent(NS_LITERAL_STRING("progress"), false, false,
michael@0	142	false, aLoaded, aTotal);
michael@0	143	if (NS_FAILED(rv)) {
michael@0	144	return;
michael@0	145	}
michael@0	146
michael@0	147	DispatchTrustedEvent(event);
michael@0	148	}