C++ ImageResource::finish方法代码示例

void ImageDocumentParser::finish()
{
    if (!isStopped() && document()->imageElement() && document()->cachedImage()) {
        ImageResource* cachedImage = document()->cachedImage();
        cachedImage->finish();
        cachedImage->setResponse(document()->frame()->loader().documentLoader()->response());

        // Report the natural image size in the page title, regardless of zoom level.
        // At a zoom level of 1 the image is guaranteed to have an integer size.
        IntSize size = flooredIntSize(cachedImage->imageSizeForLayoutObject(document()->imageElement()->layoutObject(), 1.0f));
        if (size.width()) {
            // Compute the title, we use the decoded filename of the resource, falling
            // back on the (decoded) hostname if there is no path.
            String fileName = decodeURLEscapeSequences(document()->url().lastPathComponent());
            if (fileName.isEmpty())
                fileName = document()->url().host();
            document()->setTitle(imageTitle(fileName, size));
        }

        document()->imageUpdated();
    }

    if (document())
        document()->finishedParsing();
}

void ImageDocumentParser::finish()
{
    if (!isStopped() && document()->imageElement() && document()->cachedImage()) {
        ImageResource* cachedImage = document()->cachedImage();
        DocumentLoader* loader = document()->loader();
        cachedImage->setResponse(loader->response());
        cachedImage->setLoadFinishTime(loader->timing().responseEnd());
        cachedImage->finish();

        // Report the natural image size in the page title, regardless of zoom level.
        // At a zoom level of 1 the image is guaranteed to have an integer size.
        IntSize size = flooredIntSize(cachedImage->imageSizeForLayoutObject(document()->imageElement()->layoutObject(), 1.0f));
        if (size.width()) {
            // Compute the title, we use the decoded filename of the resource, falling
            // back on the (decoded) hostname if there is no path.
            String fileName = decodeURLEscapeSequences(document()->url().lastPathComponent());
            if (fileName.isEmpty())
                fileName = document()->url().host();
            document()->setTitle(imageTitle(fileName, size));
        }

        document()->imageUpdated();
    }

    // TODO(esprehn): These null checks on Document don't make sense, document()
    // will ASSERT if it was null. Do these want to check isDetached() ?
    if (document())
        document()->finishedParsing();
}

TEST(ImageResourceTest, DecodedDataRemainsWhileHasClients)
{
    ImageResource* cachedImage = ImageResource::create(ResourceRequest());
    cachedImage->setStatus(Resource::Pending);

    Persistent<MockImageResourceClient> client = new MockImageResourceClient(cachedImage);

    // Send the image response.
    cachedImage->responseReceived(ResourceResponse(KURL(), "multipart/x-mixed-replace", 0, nullAtom, String()), nullptr);

    Vector<unsigned char> jpeg = jpegImage();
    cachedImage->responseReceived(ResourceResponse(KURL(), "image/jpeg", jpeg.size(), nullAtom, String()), nullptr);
    cachedImage->appendData(reinterpret_cast<const char*>(jpeg.data()), jpeg.size());
    cachedImage->finish();
    ASSERT_FALSE(cachedImage->errorOccurred());
    ASSERT_TRUE(cachedImage->hasImage());
    ASSERT_FALSE(cachedImage->getImage()->isNull());
    ASSERT_TRUE(client->notifyFinishedCalled());

    // The prune comes when the ImageResource still has clients. The image should not be deleted.
    cachedImage->prune();
    ASSERT_TRUE(cachedImage->hasClientsOrObservers());
    ASSERT_TRUE(cachedImage->hasImage());
    ASSERT_FALSE(cachedImage->getImage()->isNull());

    // The ImageResource no longer has clients. The image should be deleted by prune.
    client->removeAsClient();
    cachedImage->prune();
    ASSERT_FALSE(cachedImage->hasClientsOrObservers());
    ASSERT_FALSE(cachedImage->hasImage());
    ASSERT_TRUE(cachedImage->getImage()->isNull());
}

TEST(ImageResourceTest, ReloadIfLoFi)
{
    KURL testURL(ParsedURLString, "http://www.test.com/cancelTest.html");
    URLTestHelpers::registerMockedURLLoad(testURL, "cancelTest.html", "text/html");
    ResourceRequest request = ResourceRequest(testURL);
    request.setLoFiState(WebURLRequest::LoFiOn);
    ImageResource* cachedImage = ImageResource::create(request);
    cachedImage->setStatus(Resource::Pending);

    Persistent<MockImageResourceClient> client = new MockImageResourceClient(cachedImage);
    ResourceFetcher* fetcher = ResourceFetcher::create(ImageResourceTestMockFetchContext::create());

    // Send the image response.
    Vector<unsigned char> jpeg = jpegImage();
    ResourceResponse resourceResponse(KURL(), "image/jpeg", jpeg.size(), nullAtom, String());
    resourceResponse.addHTTPHeaderField("chrome-proxy", "q=low");

    cachedImage->responseReceived(resourceResponse, nullptr);
    cachedImage->appendData(reinterpret_cast<const char*>(jpeg.data()), jpeg.size());
    cachedImage->finish();
    ASSERT_FALSE(cachedImage->errorOccurred());
    ASSERT_TRUE(cachedImage->hasImage());
    ASSERT_FALSE(cachedImage->getImage()->isNull());
    ASSERT_EQ(client->imageChangedCount(), 2);
    ASSERT_TRUE(client->notifyFinishedCalled());
    ASSERT_TRUE(cachedImage->getImage()->isBitmapImage());
    EXPECT_EQ(1, cachedImage->getImage()->width());
    EXPECT_EQ(1, cachedImage->getImage()->height());

    cachedImage->reloadIfLoFi(fetcher);
    ASSERT_FALSE(cachedImage->errorOccurred());
    ASSERT_FALSE(cachedImage->resourceBuffer());
    ASSERT_FALSE(cachedImage->hasImage());
    ASSERT_EQ(client->imageChangedCount(), 3);

    cachedImage->loader()->didReceiveResponse(nullptr, WrappedResourceResponse(resourceResponse), nullptr);
    cachedImage->loader()->didReceiveData(nullptr, reinterpret_cast<const char*>(jpeg.data()), jpeg.size(), jpeg.size());
    cachedImage->loader()->didFinishLoading(nullptr, 0.0, jpeg.size());
    ASSERT_FALSE(cachedImage->errorOccurred());
    ASSERT_TRUE(cachedImage->hasImage());
    ASSERT_FALSE(cachedImage->getImage()->isNull());
    ASSERT_TRUE(client->notifyFinishedCalled());
    ASSERT_TRUE(cachedImage->getImage()->isBitmapImage());
}

TEST(ImageResourceTest, AddClientAfterPrune)
{
    KURL url(ParsedURLString, "http://127.0.0.1:8000/foo");
    ImageResource* imageResource = ImageResource::create(ResourceRequest(url));

    // Adds a ResourceClient but not ImageResourceObserver.
    Persistent<MockResourceClient> client1 = new MockResourceClient(imageResource);

    Vector<unsigned char> jpeg = jpegImage();
    ResourceResponse response;
    response.setURL(url);
    response.setHTTPStatusCode(200);
    response.setMimeType("image/jpeg");
    imageResource->responseReceived(response, nullptr);
    imageResource->appendData(reinterpret_cast<const char*>(jpeg.data()), jpeg.size());
    imageResource->finish();

    EXPECT_FALSE(imageResource->errorOccurred());
    ASSERT_TRUE(imageResource->hasImage());
    EXPECT_FALSE(imageResource->getImage()->isNull());
    EXPECT_EQ(1, imageResource->getImage()->width());
    EXPECT_EQ(1, imageResource->getImage()->height());
    EXPECT_TRUE(client1->notifyFinishedCalled());

    client1->removeAsClient();

    EXPECT_FALSE(imageResource->hasClientsOrObservers());

    imageResource->prune();

    EXPECT_FALSE(imageResource->hasImage());

    // Re-adds a ResourceClient but not ImageResourceObserver.
    Persistent<MockResourceClient> client2 = new MockResourceClient(imageResource);

    ASSERT_TRUE(imageResource->hasImage());
    EXPECT_FALSE(imageResource->getImage()->isNull());
    EXPECT_EQ(1, imageResource->getImage()->width());
    EXPECT_EQ(1, imageResource->getImage()->height());
    EXPECT_TRUE(client2->notifyFinishedCalled());
}

TEST(ImageResourceTest, ReloadIfLoFiAfterFinished) {
  KURL testURL(ParsedURLString, "http://www.test.com/cancelTest.html");
  ScopedRegisteredURL scopedRegisteredURL(testURL);
  ResourceRequest request = ResourceRequest(testURL);
  request.setLoFiState(WebURLRequest::LoFiOn);
  ImageResource* cachedImage = ImageResource::create(request);
  cachedImage->setStatus(Resource::Pending);

  Persistent<MockImageResourceClient> client =
      new MockImageResourceClient(cachedImage);
  ResourceFetcher* fetcher =
      ResourceFetcher::create(ImageResourceTestMockFetchContext::create());

  // Send the image response.
  Vector<unsigned char> jpeg = jpegImage();
  ResourceResponse resourceResponse(KURL(), "image/jpeg", jpeg.size(), nullAtom,
                                    String());
  resourceResponse.addHTTPHeaderField("chrome-proxy", "q=low");

  cachedImage->responseReceived(resourceResponse, nullptr);
  cachedImage->appendData(reinterpret_cast<const char*>(jpeg.data()),
                          jpeg.size());
  cachedImage->finish();
  EXPECT_FALSE(cachedImage->errorOccurred());
  ASSERT_TRUE(cachedImage->hasImage());
  EXPECT_FALSE(cachedImage->getImage()->isNull());
  EXPECT_EQ(2, client->imageChangedCount());
  EXPECT_EQ(jpeg.size(), client->encodedSizeOnLastImageChanged());
  // The client should have been notified that the image load completed.
  EXPECT_TRUE(client->notifyFinishedCalled());
  EXPECT_EQ(jpeg.size(), client->encodedSizeOnNotifyFinished());
  EXPECT_EQ(jpeg.size(), client->encodedSizeOnImageNotifyFinished());
  EXPECT_TRUE(cachedImage->getImage()->isBitmapImage());
  EXPECT_EQ(1, cachedImage->getImage()->width());
  EXPECT_EQ(1, cachedImage->getImage()->height());

  // Call reloadIfLoFi() after the image has finished loading.
  cachedImage->reloadIfLoFi(fetcher);
  EXPECT_FALSE(cachedImage->errorOccurred());
  EXPECT_FALSE(cachedImage->resourceBuffer());
  EXPECT_FALSE(cachedImage->hasImage());
  EXPECT_EQ(3, client->imageChangedCount());

  Vector<unsigned char> jpeg2 = jpegImage2();
  cachedImage->loader()->didReceiveResponse(
      nullptr, WrappedResourceResponse(resourceResponse), nullptr);
  cachedImage->loader()->didReceiveData(
      nullptr, reinterpret_cast<const char*>(jpeg2.data()), jpeg2.size(),
      jpeg2.size(), jpeg2.size());
  cachedImage->loader()->didFinishLoading(nullptr, 0.0, jpeg2.size());
  EXPECT_FALSE(cachedImage->errorOccurred());
  ASSERT_TRUE(cachedImage->hasImage());
  EXPECT_FALSE(cachedImage->getImage()->isNull());
  EXPECT_EQ(jpeg2.size(), client->encodedSizeOnLastImageChanged());
  EXPECT_TRUE(client->notifyFinishedCalled());
  // The client should not have been notified of completion again.
  EXPECT_EQ(jpeg.size(), client->encodedSizeOnNotifyFinished());
  EXPECT_EQ(jpeg.size(), client->encodedSizeOnImageNotifyFinished());
  EXPECT_TRUE(cachedImage->getImage()->isBitmapImage());
  EXPECT_EQ(50, cachedImage->getImage()->width());
  EXPECT_EQ(50, cachedImage->getImage()->height());
}