The Tor Browser / annotate

content/media/WebVTTListener.cpp@44a2da4a2ab2 (annotated)

content/media/WebVTTListener.cpp

Fri, 16 Jan 2015 04:50:19 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Fri, 16 Jan 2015 04:50:19 +0100
branch
TOR_BUG_9701
changeset 13
44a2da4a2ab2
permissions
-rw-r--r--

Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32

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 #include "WebVTTListener.h"
michael@0 7 #include "mozilla/dom/TextTrackCue.h"
michael@0 8 #include "mozilla/dom/TextTrackRegion.h"
michael@0 9 #include "mozilla/dom/VTTRegionBinding.h"
michael@0 10 #include "mozilla/dom/HTMLTrackElement.h"
michael@0 11 #include "nsIInputStream.h"
michael@0 12 #include "nsIWebVTTParserWrapper.h"
michael@0 13 #include "nsComponentManagerUtils.h"
michael@0 14
michael@0 15 namespace mozilla {
michael@0 16 namespace dom {
michael@0 17
michael@0 18 NS_IMPL_CYCLE_COLLECTION(WebVTTListener, mElement, mParserWrapper)
michael@0 19
michael@0 20 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(WebVTTListener)
michael@0 21 NS_INTERFACE_MAP_ENTRY(nsIWebVTTListener)
michael@0 22 NS_INTERFACE_MAP_ENTRY(nsIStreamListener)
michael@0 23 NS_INTERFACE_MAP_ENTRY(nsIChannelEventSink)
michael@0 24 NS_INTERFACE_MAP_ENTRY(nsIInterfaceRequestor)
michael@0 25 NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIWebVTTListener)
michael@0 26 NS_INTERFACE_MAP_END
michael@0 27
michael@0 28 NS_IMPL_CYCLE_COLLECTING_ADDREF(WebVTTListener)
michael@0 29 NS_IMPL_CYCLE_COLLECTING_RELEASE(WebVTTListener)
michael@0 30
michael@0 31 #ifdef PR_LOGGING
michael@0 32 PRLogModuleInfo* gTextTrackLog;
michael@0 33 # define VTT_LOG(...) PR_LOG(gTextTrackLog, PR_LOG_DEBUG, (__VA_ARGS__))
michael@0 34 #else
michael@0 35 # define VTT_LOG(msg)
michael@0 36 #endif
michael@0 37
michael@0 38 WebVTTListener::WebVTTListener(HTMLTrackElement* aElement)
michael@0 39 : mElement(aElement)
michael@0 40 {
michael@0 41 MOZ_ASSERT(mElement, "Must pass an element to the callback");
michael@0 42 #ifdef PR_LOGGING
michael@0 43 if (!gTextTrackLog) {
michael@0 44 gTextTrackLog = PR_NewLogModule("TextTrack");
michael@0 45 }
michael@0 46 #endif
michael@0 47 VTT_LOG("WebVTTListener created.");
michael@0 48 }
michael@0 49
michael@0 50 WebVTTListener::~WebVTTListener()
michael@0 51 {
michael@0 52 VTT_LOG("WebVTTListener destroyed.");
michael@0 53 }
michael@0 54
michael@0 55 NS_IMETHODIMP
michael@0 56 WebVTTListener::GetInterface(const nsIID &aIID,
michael@0 57 void** aResult)
michael@0 58 {
michael@0 59 return QueryInterface(aIID, aResult);
michael@0 60 }
michael@0 61
michael@0 62 nsresult
michael@0 63 WebVTTListener::LoadResource()
michael@0 64 {
michael@0 65 if (!HTMLTrackElement::IsWebVTTEnabled()) {
michael@0 66 NS_WARNING("WebVTT support disabled."
michael@0 67 " See media.webvtt.enabled in about:config. ");
michael@0 68 return NS_ERROR_FAILURE;
michael@0 69 }
michael@0 70 nsresult rv;
michael@0 71 mParserWrapper = do_CreateInstance(NS_WEBVTTPARSERWRAPPER_CONTRACTID, &rv);
michael@0 72 NS_ENSURE_SUCCESS(rv, rv);
michael@0 73
michael@0 74 nsPIDOMWindow* window = mElement->OwnerDoc()->GetWindow();
michael@0 75 rv = mParserWrapper->LoadParser(window);
michael@0 76 NS_ENSURE_SUCCESS(rv, rv);
michael@0 77
michael@0 78 rv = mParserWrapper->Watch(this);
michael@0 79 NS_ENSURE_SUCCESS(rv, rv);
michael@0 80
michael@0 81 mElement->SetReadyState(TextTrackReadyState::Loading);
michael@0 82 return NS_OK;
michael@0 83 }
michael@0 84
michael@0 85 NS_IMETHODIMP
michael@0 86 WebVTTListener::AsyncOnChannelRedirect(nsIChannel* aOldChannel,
michael@0 87 nsIChannel* aNewChannel,
michael@0 88 uint32_t aFlags,
michael@0 89 nsIAsyncVerifyRedirectCallback* cb)
michael@0 90 {
michael@0 91 if (mElement) {
michael@0 92 mElement->OnChannelRedirect(aOldChannel, aNewChannel, aFlags);
michael@0 93 }
michael@0 94 return NS_OK;
michael@0 95 }
michael@0 96
michael@0 97 NS_IMETHODIMP
michael@0 98 WebVTTListener::OnStartRequest(nsIRequest* aRequest,
michael@0 99 nsISupports* aContext)
michael@0 100 {
michael@0 101 return NS_OK;
michael@0 102 }
michael@0 103
michael@0 104 NS_IMETHODIMP
michael@0 105 WebVTTListener::OnStopRequest(nsIRequest* aRequest,
michael@0 106 nsISupports* aContext,
michael@0 107 nsresult aStatus)
michael@0 108 {
michael@0 109 if (NS_FAILED(aStatus)) {
michael@0 110 mElement->SetReadyState(TextTrackReadyState::FailedToLoad);
michael@0 111 }
michael@0 112 // Attempt to parse any final data the parser might still have.
michael@0 113 mParserWrapper->Flush();
michael@0 114 if (mElement->ReadyState() != TextTrackReadyState::FailedToLoad) {
michael@0 115 mElement->SetReadyState(TextTrackReadyState::Loaded);
michael@0 116 }
michael@0 117 return aStatus;
michael@0 118 }
michael@0 119
michael@0 120 NS_METHOD
michael@0 121 WebVTTListener::ParseChunk(nsIInputStream* aInStream, void* aClosure,
michael@0 122 const char* aFromSegment, uint32_t aToOffset,
michael@0 123 uint32_t aCount, uint32_t* aWriteCount)
michael@0 124 {
michael@0 125 nsCString buffer(aFromSegment, aCount);
michael@0 126 WebVTTListener* listener = static_cast<WebVTTListener*>(aClosure);
michael@0 127
michael@0 128 if (NS_FAILED(listener->mParserWrapper->Parse(buffer))) {
michael@0 129 VTT_LOG("Unable to parse chunk of WEBVTT text. Aborting.");
michael@0 130 *aWriteCount = 0;
michael@0 131 return NS_ERROR_FAILURE;
michael@0 132 }
michael@0 133
michael@0 134 *aWriteCount = aCount;
michael@0 135 return NS_OK;
michael@0 136 }
michael@0 137
michael@0 138 NS_IMETHODIMP
michael@0 139 WebVTTListener::OnDataAvailable(nsIRequest* aRequest,
michael@0 140 nsISupports* aContext,
michael@0 141 nsIInputStream* aStream,
michael@0 142 uint64_t aOffset,
michael@0 143 uint32_t aCount)
michael@0 144 {
michael@0 145 uint32_t count = aCount;
michael@0 146 while (count > 0) {
michael@0 147 uint32_t read;
michael@0 148 nsresult rv = aStream->ReadSegments(ParseChunk, this, count, &read);
michael@0 149 NS_ENSURE_SUCCESS(rv, rv);
michael@0 150 if (!read) {
michael@0 151 return NS_ERROR_FAILURE;
michael@0 152 }
michael@0 153 count -= read;
michael@0 154 }
michael@0 155
michael@0 156 return NS_OK;
michael@0 157 }
michael@0 158
michael@0 159 NS_IMETHODIMP
michael@0 160 WebVTTListener::OnCue(JS::Handle<JS::Value> aCue, JSContext* aCx)
michael@0 161 {
michael@0 162 if (!aCue.isObject()) {
michael@0 163 return NS_ERROR_FAILURE;
michael@0 164 }
michael@0 165
michael@0 166 TextTrackCue* cue;
michael@0 167 nsresult rv = UNWRAP_OBJECT(VTTCue, &aCue.toObject(), cue);
michael@0 168 NS_ENSURE_SUCCESS(rv, rv);
michael@0 169
michael@0 170 cue->SetTrackElement(mElement);
michael@0 171 mElement->mTrack->AddCue(*cue);
michael@0 172
michael@0 173 return NS_OK;
michael@0 174 }
michael@0 175
michael@0 176
michael@0 177 NS_IMETHODIMP
michael@0 178 WebVTTListener::OnRegion(JS::Handle<JS::Value> aRegion, JSContext* aCx)
michael@0 179 {
michael@0 180 // Nothing for this callback to do.
michael@0 181 return NS_OK;
michael@0 182 }
michael@0 183
michael@0 184 NS_IMETHODIMP
michael@0 185 WebVTTListener::OnParsingError(int32_t errorCode, JSContext* cx)
michael@0 186 {
michael@0 187 // We only care about files that have a bad WebVTT file signature right now
michael@0 188 // as that means the file failed to load.
michael@0 189 if (errorCode == ErrorCodes::BadSignature) {
michael@0 190 mElement->SetReadyState(TextTrackReadyState::FailedToLoad);
michael@0 191 }
michael@0 192 return NS_OK;
michael@0 193 }
michael@0 194
michael@0 195 } // namespace dom
michael@0 196 } // namespace mozilla

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