Merge WebKit at r66666 : Initial merge by git.

Change-Id: I57dedeb49859adc9c539e760f0e749768c66626f

1 files changed, 123 insertions, 0 deletions

diff --git a/WebCore/fileapi/Blob.cpp b/WebCore/fileapi/Blob.cpp
new file mode 100644
index 0000000..5fed327
--- /dev/null
+++ b/WebCore/fileapi/Blob.cpp
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2010 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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 THE COPYRIGHT
+ * OWNER 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.
+ */
+
+#include "config.h"
+#include "Blob.h"
+
+#include "BlobURL.h"
+#include "File.h"
+#include "ScriptExecutionContext.h"
+#include "ThreadableBlobRegistry.h"
+
+namespace WebCore {
+
+Blob::Blob(ScriptExecutionContext* scriptExecutionContext, PassOwnPtr<BlobData> blobData, long long size)
+    : m_scriptExecutionContext(scriptExecutionContext)
+    , m_type(blobData->contentType())
+    , m_size(size)
+{
+    ASSERT(blobData);
+
+    m_scriptExecutionContext->addBlob(this);
+
+    // Create a new internal URL and register it with the provided blob data.
+    m_url = BlobURL::createURL(scriptExecutionContext);
+    ThreadableBlobRegistry::registerBlobURL(scriptExecutionContext, m_url, blobData);
+}
+
+Blob::Blob(ScriptExecutionContext* scriptExecutionContext, const KURL& srcURL, const String& type, long long size)
+    : m_scriptExecutionContext(scriptExecutionContext)
+    , m_type(type)
+    , m_size(size)
+{
+   m_scriptExecutionContext->addBlob(this);
+
+    // Create a new internal URL and register it with the same blob data as the source URL.
+    m_url = BlobURL::createURL(scriptExecutionContext);
+    ThreadableBlobRegistry::registerBlobURL(scriptExecutionContext, m_url, srcURL);
+}
+
+Blob::~Blob()
+{
+    // The internal URL is only used to refer to the Blob object. So we need to unregister the URL when the object is GC-ed.
+    if (m_scriptExecutionContext) {
+        m_scriptExecutionContext->removeBlob(this);
+        ThreadableBlobRegistry::unregisterBlobURL(m_scriptExecutionContext, m_url);
+    }
+}
+
+void Blob::contextDestroyed()
+{
+    ASSERT(m_scriptExecutionContext);
+
+    // Unregister the internal URL before the context is gone.
+    ThreadableBlobRegistry::unregisterBlobURL(m_scriptExecutionContext, m_url);
+    m_scriptExecutionContext = 0;
+}
+
+#if ENABLE(BLOB)
+PassRefPtr<Blob> Blob::slice(ScriptExecutionContext* scriptExecutionContext, long long start, long long length, const String& contentType) const
+{
+    // When we slice a file for the first time, we obtain a snapshot of the file by capturing its current size and modification time.
+    // The modification time will be used to verify if the file has been changed or not, when the underlying data are accessed.
+    long long size;
+    double modificationTime;
+    if (isFile())
+        // FIXME: This involves synchronous file operation. We need to figure out how to make it asynchronous.
+        static_cast<const File*>(this)->captureSnapshot(size, modificationTime);
+    else {
+        ASSERT(m_size != -1);
+        size = m_size;
+    }
+
+    // Clamp the range if it exceeds the size limit.
+    if (start < 0)
+        start = 0;
+    if (length < 0)
+        length = 0;
+
+    if (start >= size) {
+        start = 0;
+        length = 0;
+    } else if (start + length > size)
+        length = size - start;
+
+    OwnPtr<BlobData> blobData = BlobData::create();
+    blobData->setContentType(contentType);
+    if (isFile())
+        blobData->appendFile(static_cast<const File*>(this)->path(), start, length, modificationTime);
+    else
+        blobData->appendBlob(m_url, start, length);
+
+    return Blob::create(scriptExecutionContext, blobData.release(), length);
+}
+#endif
+
+} // namespace WebCore