Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 259 insertions, 0 deletions

diff --git a/Source/WebCore/fileapi/FileReader.cpp b/Source/WebCore/fileapi/FileReader.cpp
new file mode 100644
index 0000000..fd2e263
--- /dev/null
+++ b/Source/WebCore/fileapi/FileReader.cpp
@@ -0,0 +1,259 @@
+/*
+ * 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"
+
+#if ENABLE(BLOB)
+
+#include "FileReader.h"
+
+#include "ArrayBuffer.h"
+#include "CrossThreadTask.h"
+#include "File.h"
+#include "Logging.h"
+#include "ProgressEvent.h"
+#include "ScriptExecutionContext.h"
+#include <wtf/CurrentTime.h>
+#include <wtf/text/CString.h>
+
+namespace WebCore {
+
+static const double progressNotificationIntervalMS = 50;
+
+FileReader::FileReader(ScriptExecutionContext* context)
+    : ActiveDOMObject(context, this)
+    , m_state(None)
+    , m_readType(FileReaderLoader::ReadAsBinaryString)
+    , m_lastProgressNotificationTimeMS(0)
+{
+}
+
+FileReader::~FileReader()
+{
+    terminate();
+}
+
+bool FileReader::hasPendingActivity() const
+{
+    return (m_state != None && m_state != Completed) || ActiveDOMObject::hasPendingActivity();
+}
+
+bool FileReader::canSuspend() const
+{
+    // FIXME: It is not currently possible to suspend a FileReader, so pages with FileReader can not go into page cache.
+    return false;
+}
+
+void FileReader::stop()
+{
+    terminate();
+}
+
+void FileReader::readAsArrayBuffer(Blob* blob)
+{
+    if (!blob)
+        return;
+
+    LOG(FileAPI, "FileReader: reading as array buffer: %s %s\n", blob->url().string().utf8().data(), blob->isFile() ? static_cast<File*>(blob)->path().utf8().data() : "");
+
+    readInternal(blob, FileReaderLoader::ReadAsArrayBuffer);
+}
+
+void FileReader::readAsBinaryString(Blob* blob)
+{
+    if (!blob)
+        return;
+
+    LOG(FileAPI, "FileReader: reading as binary: %s %s\n", blob->url().string().utf8().data(), blob->isFile() ? static_cast<File*>(blob)->path().utf8().data() : "");
+
+    readInternal(blob, FileReaderLoader::ReadAsBinaryString);
+}
+
+void FileReader::readAsText(Blob* blob, const String& encoding)
+{
+    if (!blob)
+        return;
+
+    LOG(FileAPI, "FileReader: reading as text: %s %s\n", blob->url().string().utf8().data(), blob->isFile() ? static_cast<File*>(blob)->path().utf8().data() : "");
+
+    m_encoding = encoding;
+    readInternal(blob, FileReaderLoader::ReadAsText);
+}
+
+void FileReader::readAsDataURL(Blob* blob)
+{
+    if (!blob)
+        return;
+
+    LOG(FileAPI, "FileReader: reading as data URL: %s %s\n", blob->url().string().utf8().data(), blob->isFile() ? static_cast<File*>(blob)->path().utf8().data() : "");
+
+    readInternal(blob, FileReaderLoader::ReadAsDataURL);
+}
+
+static void delayedStart(ScriptExecutionContext*, FileReader* reader)
+{
+    reader->start();
+}
+
+void FileReader::readInternal(Blob* blob, FileReaderLoader::ReadType type)
+{
+    // readAs*** methods() can be called multiple times. Only the last call before the actual reading happens is processed.
+    if (m_state != None && m_state != Starting)
+        return;
+
+    if (m_state == None)
+        scriptExecutionContext()->postTask(createCallbackTask(&delayedStart, this));
+
+    m_blob = blob;
+    m_readType = type;
+    m_state = Starting;
+}
+
+static void delayedAbort(ScriptExecutionContext*, FileReader* reader)
+{
+    reader->doAbort();
+}
+
+void FileReader::abort()
+{
+    LOG(FileAPI, "FileReader: aborting\n");
+
+    if (m_state == Aborting)
+        return;
+    m_state = Aborting;
+
+    // Schedule to have the abort done later since abort() might be called from the event handler and we do not want the resource loading code to be in the stack.
+    scriptExecutionContext()->postTask(createCallbackTask(&delayedAbort, this));
+}
+
+void FileReader::doAbort()
+{
+    terminate();
+
+    m_error = FileError::create(FileError::ABORT_ERR);
+
+    fireEvent(eventNames().errorEvent);
+    fireEvent(eventNames().abortEvent);
+    fireEvent(eventNames().loadendEvent);
+}
+
+void FileReader::terminate()
+{
+    if (m_loader) {
+        m_loader->cancel();
+        m_loader = 0;
+    }
+    m_state = Completed;
+}
+
+void FileReader::start()
+{
+    m_state = Opening;
+
+    m_loader = adoptPtr(new FileReaderLoader(m_readType, this));
+    m_loader->setEncoding(m_encoding);
+    m_loader->setDataType(m_blob->type());
+    m_loader->start(scriptExecutionContext(), m_blob.get());
+}
+
+void FileReader::didStartLoading()
+{
+    m_state = Reading;
+    fireEvent(eventNames().loadstartEvent);
+}
+
+void FileReader::didReceiveData()
+{
+    // Fire the progress event at least every 50ms.
+    double now = currentTimeMS();
+    if (!m_lastProgressNotificationTimeMS)
+        m_lastProgressNotificationTimeMS = now;
+    else if (now - m_lastProgressNotificationTimeMS > progressNotificationIntervalMS) {
+        fireEvent(eventNames().progressEvent);
+        m_lastProgressNotificationTimeMS = now;
+    }
+}
+
+void FileReader::didFinishLoading()
+{
+    m_state = Completed;
+
+    fireEvent(eventNames().loadEvent);
+    fireEvent(eventNames().loadendEvent);
+}
+
+void FileReader::didFail(int errorCode)
+{
+    // If we're aborting, do not proceed with normal error handling since it is covered in aborting code.
+    if (m_state == Aborting)
+        return;
+
+    m_state = Completed;
+
+    m_error = FileError::create(static_cast<FileError::ErrorCode>(errorCode));
+    fireEvent(eventNames().errorEvent);
+    fireEvent(eventNames().loadendEvent);
+}
+
+void FileReader::fireEvent(const AtomicString& type)
+{
+    dispatchEvent(ProgressEvent::create(type, true, m_loader ? m_loader->bytesLoaded() : 0, m_loader ? m_loader->totalBytes() : 0));
+}
+
+FileReader::ReadyState FileReader::readyState() const
+{
+    switch (m_state) {
+    case None:
+    case Starting:
+        return EMPTY;
+    case Opening:
+    case Reading:
+    case Aborting:
+        return LOADING;
+    case Completed:
+        return DONE;
+    }
+    ASSERT_NOT_REACHED();
+    return EMPTY;
+}
+
+PassRefPtr<ArrayBuffer> FileReader::arrayBufferResult() const
+{
+    return m_loader ? m_loader->arrayBufferResult() : 0;
+}
+
+String FileReader::stringResult()
+{
+    return m_loader ? m_loader->stringResult() : "";
+}
+
+} // namespace WebCore
+ 
+#endif // ENABLE(BLOB)