Add QtPdf and QtPdfWidgets modules

This change adds two new modules to qtwebengine repository.

New modules do not depend on webengine module, however webengine
chromium source code and Chromium "gn" configuration is
required to build QtPdf.

Adding two unrelated modules to webengine might look crazy:
however sharing gn build configuration and Chromium code base
with necessary qt adaptations simplifies code maintenance and
minimises required code checkouts. Back porting of security
patches for Chromium also affects Pdfium. Moreover, Pdfium is no
longer a separate project, but integrated into Chromium:
therefore moving it out of Chromium source tree would require
extra effort.

Rename webengine-core feature to build-qtwebengine-core, this
makes consistent feature naming with build-qtpdf

At the moment two new modules have integrated build, with possible
shortcuts:

    qmake -- --no-build-qtwebengine-core
    qmake -- --no-build-qtpdf

Webengine build is disabled by default now.

Change-Id: Iac3d9927d51f3ac316db0148d275eda843dcc19b
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

1 files changed, 100 insertions, 0 deletions

diff --git a/src/pdf/api/qpdfdocument_p.h b/src/pdf/api/qpdfdocument_p.h
new file mode 100644
index 000000000..d8d950b3c
--- /dev/null
+++ b/src/pdf/api/qpdfdocument_p.h
@@ -0,0 +1,100 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtPDF module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QPDFDOCUMENT_P_H
+#define QPDFDOCUMENT_P_H
+
+#include "qpdfdocument.h"
+
+#include "third_party/pdfium/public/fpdfview.h"
+#include "third_party/pdfium/public/fpdf_dataavail.h"
+
+#include <qbuffer.h>
+#include <qmutex.h>
+#include <qnetworkreply.h>
+#include <qpointer.h>
+
+QT_BEGIN_NAMESPACE
+
+class QPdfMutexLocker : public QMutexLocker
+{
+public:
+    QPdfMutexLocker();
+};
+
+class QPdfDocumentPrivate: public FPDF_FILEACCESS, public FX_FILEAVAIL, public FX_DOWNLOADHINTS
+{
+public:
+    QPdfDocumentPrivate();
+    ~QPdfDocumentPrivate();
+
+    QPdfDocument *q;
+
+    FPDF_AVAIL avail;
+    FPDF_DOCUMENT doc;
+    bool loadComplete;
+
+    QPointer<QIODevice> device;
+    QScopedPointer<QIODevice> ownDevice;
+    QBuffer asyncBuffer;
+    QPointer<QIODevice> sequentialSourceDevice;
+    QByteArray password;
+
+    QPdfDocument::Status status;
+    QPdfDocument::DocumentError lastError;
+    int pageCount;
+
+    void clear();
+
+    void load(QIODevice *device, bool ownDevice);
+    void loadAsync(QIODevice *device);
+
+    void _q_tryLoadingWithSizeFromContentHeader();
+    void initiateAsyncLoadWithTotalSizeKnown(quint64 totalSize);
+    void _q_copyFromSequentialSourceDevice();
+    void tryLoadDocument();
+    void checkComplete();
+    void setStatus(QPdfDocument::Status status);
+
+    static FPDF_BOOL fpdf_IsDataAvail(struct _FX_FILEAVAIL* pThis, size_t offset, size_t size);
+    static int fpdf_GetBlock(void* param, unsigned long position, unsigned char* pBuf, unsigned long size);
+    static void fpdf_AddSegment(struct _FX_DOWNLOADHINTS* pThis, size_t offset, size_t size);
+    void updateLastError();
+};
+
+QT_END_NAMESPACE
+
+#endif // QPDFDOCUMENT_P_H