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content/base/src/nsDOMBlobBuilder.h@6474c204b198 (annotated)

content/base/src/nsDOMBlobBuilder.h

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0	2	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	3	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	4	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	5
michael@0	6	#ifndef nsDOMBlobBuilder_h
michael@0	7	#define nsDOMBlobBuilder_h
michael@0	8
michael@0	9	#include "nsDOMFile.h"
michael@0	10
michael@0	11	#include "mozilla/CheckedInt.h"
michael@0	12	#include "mozilla/Attributes.h"
michael@0	13	#include <algorithm>
michael@0	14
michael@0	15	#define NS_DOMMULTIPARTBLOB_CID { 0x47bf0b43, 0xf37e, 0x49ef, \
michael@0	16	{ 0x81, 0xa0, 0x18, 0xba, 0xc0, 0x57, 0xb5, 0xcc } }
michael@0	17	#define NS_DOMMULTIPARTBLOB_CONTRACTID "@mozilla.org/dom/multipart-blob;1"
michael@0	18
michael@0	19	#define NS_DOMMULTIPARTFILE_CID { 0xc3361f77, 0x60d1, 0x4ea9, \
michael@0	20	{ 0x94, 0x96, 0xdf, 0x5d, 0x6f, 0xcd, 0xd7, 0x8f } }
michael@0	21	#define NS_DOMMULTIPARTFILE_CONTRACTID "@mozilla.org/dom/multipart-file;1"
michael@0	22
michael@0	23	class nsDOMMultipartFile : public nsDOMFile,
michael@0	24	public nsIJSNativeInitializer
michael@0	25	{
michael@0	26	public:
michael@0	27	// Create as a file
michael@0	28	nsDOMMultipartFile(nsTArray<nsCOMPtr<nsIDOMBlob> > aBlobs,
michael@0	29	const nsAString& aName,
michael@0	30	const nsAString& aContentType)
michael@0	31	: nsDOMFile(aName, aContentType, UINT64_MAX),
michael@0	32	mBlobs(aBlobs),
michael@0	33	mIsFromNsiFile(false)
michael@0	34	{
michael@0	35	}
michael@0	36
michael@0	37	// Create as a blob
michael@0	38	nsDOMMultipartFile(nsTArray<nsCOMPtr<nsIDOMBlob> >& aBlobs,
michael@0	39	const nsAString& aContentType)
michael@0	40	: nsDOMFile(aContentType, UINT64_MAX),
michael@0	41	mBlobs(aBlobs),
michael@0	42	mIsFromNsiFile(false)
michael@0	43	{
michael@0	44	}
michael@0	45
michael@0	46	// Create as a file to be later initialized
michael@0	47	nsDOMMultipartFile(const nsAString& aName)
michael@0	48	: nsDOMFile(aName, EmptyString(), UINT64_MAX),
michael@0	49	mIsFromNsiFile(false)
michael@0	50	{
michael@0	51	}
michael@0	52
michael@0	53	// Create as a blob to be later initialized
michael@0	54	nsDOMMultipartFile()
michael@0	55	: nsDOMFile(EmptyString(), UINT64_MAX),
michael@0	56	mIsFromNsiFile(false)
michael@0	57	{
michael@0	58	}
michael@0	59
michael@0	60	NS_DECL_ISUPPORTS_INHERITED
michael@0	61
michael@0	62	// nsIJSNativeInitializer
michael@0	63	NS_IMETHOD Initialize(nsISupports* aOwner,
michael@0	64	JSContext* aCx,
michael@0	65	JSObject* aObj,
michael@0	66	const JS::CallArgs& aArgs) MOZ_OVERRIDE;
michael@0	67
michael@0	68	typedef nsIDOMBlob* (*UnwrapFuncPtr)(JSContext*, JSObject*);
michael@0	69	nsresult InitBlob(JSContext* aCx,
michael@0	70	uint32_t aArgc,
michael@0	71	JS::Value* aArgv,
michael@0	72	UnwrapFuncPtr aUnwrapFunc);
michael@0	73	nsresult InitFile(JSContext* aCx,
michael@0	74	uint32_t aArgc,
michael@0	75	JS::Value* aArgv);
michael@0	76	nsresult InitChromeFile(JSContext* aCx,
michael@0	77	uint32_t aArgc,
michael@0	78	JS::Value* aArgv);
michael@0	79
michael@0	80	already_AddRefed<nsIDOMBlob>
michael@0	81	CreateSlice(uint64_t aStart, uint64_t aLength, const nsAString& aContentType) MOZ_OVERRIDE;
michael@0	82
michael@0	83	NS_IMETHOD GetSize(uint64_t*) MOZ_OVERRIDE;
michael@0	84	NS_IMETHOD GetInternalStream(nsIInputStream**) MOZ_OVERRIDE;
michael@0	85
michael@0	86	static nsresult
michael@0	87	NewFile(const nsAString& aName, nsISupports* *aNewObject);
michael@0	88
michael@0	89	// DOMClassInfo constructor (for Blob([b1, "foo"], { type: "image/png" }))
michael@0	90	static nsresult
michael@0	91	NewBlob(nsISupports* *aNewObject);
michael@0	92
michael@0	93	// DOMClassInfo constructor (for File([b1, "foo"], { type: "image/png",
michael@0	94	// name: "foo.png" }))
michael@0	95	inline static nsresult
michael@0	96	NewFile(nsISupports* *aNewObject)
michael@0	97	{
michael@0	98	// Initialization will set the filename, so we can pass in an empty string
michael@0	99	// for now.
michael@0	100	return NewFile(EmptyString(), aNewObject);
michael@0	101	}
michael@0	102
michael@0	103	virtual const nsTArray<nsCOMPtr<nsIDOMBlob> >*
michael@0	104	GetSubBlobs() const MOZ_OVERRIDE { return &mBlobs; }
michael@0	105
michael@0	106	NS_IMETHOD GetMozFullPathInternal(nsAString& aFullPath) MOZ_OVERRIDE;
michael@0	107
michael@0	108	protected:
michael@0	109	nsresult ParseBlobArrayArgument(JSContext* aCx, JS::Value& aValue,
michael@0	110	bool aNativeEOL, UnwrapFuncPtr aUnwrapFunc);
michael@0	111
michael@0	112	nsTArray<nsCOMPtr<nsIDOMBlob> > mBlobs;
michael@0	113	bool mIsFromNsiFile;
michael@0	114	};
michael@0	115
michael@0	116	class BlobSet {
michael@0	117	public:
michael@0	118	BlobSet()
michael@0	119	: mData(nullptr), mDataLen(0), mDataBufferLen(0)
michael@0	120	{}
michael@0	121
michael@0	122	nsresult AppendVoidPtr(const void* aData, uint32_t aLength);
michael@0	123	nsresult AppendString(JSString* aString, bool nativeEOL, JSContext* aCx);
michael@0	124	nsresult AppendBlob(nsIDOMBlob* aBlob);
michael@0	125	nsresult AppendArrayBuffer(JSObject* aBuffer);
michael@0	126	nsresult AppendBlobs(const nsTArray<nsCOMPtr<nsIDOMBlob> >& aBlob);
michael@0	127
michael@0	128	nsTArray<nsCOMPtr<nsIDOMBlob> >& GetBlobs() { Flush(); return mBlobs; }
michael@0	129
michael@0	130	already_AddRefed<nsIDOMBlob>
michael@0	131	GetBlobInternal(const nsACString& aContentType)
michael@0	132	{
michael@0	133	nsCOMPtr<nsIDOMBlob> blob =
michael@0	134	new nsDOMMultipartFile(GetBlobs(), NS_ConvertASCIItoUTF16(aContentType));
michael@0	135	return blob.forget();
michael@0	136	}
michael@0	137
michael@0	138	protected:
michael@0	139	bool ExpandBufferSize(uint64_t aSize)
michael@0	140	{
michael@0	141	using mozilla::CheckedUint32;
michael@0	142
michael@0	143	if (mDataBufferLen >= mDataLen + aSize) {
michael@0	144	mDataLen += aSize;
michael@0	145	return true;
michael@0	146	}
michael@0	147
michael@0	148	// Start at 1 or we'll loop forever.
michael@0	149	CheckedUint32 bufferLen =
michael@0	150	std::max<uint32_t>(static_cast<uint32_t>(mDataBufferLen), 1);
michael@0	151	while (bufferLen.isValid() && bufferLen.value() < mDataLen + aSize)
michael@0	152	bufferLen *= 2;
michael@0	153
michael@0	154	if (!bufferLen.isValid())
michael@0	155	return false;
michael@0	156
michael@0	157	void* data = moz_realloc(mData, bufferLen.value());
michael@0	158	if (!data)
michael@0	159	return false;
michael@0	160
michael@0	161	mData = data;
michael@0	162	mDataBufferLen = bufferLen.value();
michael@0	163	mDataLen += aSize;
michael@0	164	return true;
michael@0	165	}
michael@0	166
michael@0	167	void Flush() {
michael@0	168	if (mData) {
michael@0	169	// If we have some data, create a blob for it
michael@0	170	// and put it on the stack
michael@0	171
michael@0	172	nsCOMPtr<nsIDOMBlob> blob =
michael@0	173	new nsDOMMemoryFile(mData, mDataLen, EmptyString(), EmptyString());
michael@0	174	mBlobs.AppendElement(blob);
michael@0	175	mData = nullptr; // The nsDOMMemoryFile takes ownership of the buffer
michael@0	176	mDataLen = 0;
michael@0	177	mDataBufferLen = 0;
michael@0	178	}
michael@0	179	}
michael@0	180
michael@0	181	nsTArray<nsCOMPtr<nsIDOMBlob> > mBlobs;
michael@0	182	void* mData;
michael@0	183	uint64_t mDataLen;
michael@0	184	uint64_t mDataBufferLen;
michael@0	185	};
michael@0	186
michael@0	187	#endif