Implement dialogs of File System Access API

Dialogs triggered by window.showOpenFilePicker() or
window.showDirectoryPicker() needed different implementation than
regular file picker dialogs. Since the end-users can't distinguish
between HTML file picker dialogs and these file system access dialogs,
we can just use the existing file picker WebEngine API and UI delegates.

Task-number: QTBUG-92519
Change-Id: Ib1624f80603c4042803303274ba45d864ecb371c
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
(cherry picked from commit 46a2f0f3137dcb46f2752130bbee6438742c27ac)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 185 insertions, 0 deletions

diff --git a/src/core/select_file_dialog_factory_qt.cpp b/src/core/select_file_dialog_factory_qt.cpp
new file mode 100644
index 000000000..baad07b24
--- /dev/null
+++ b/src/core/select_file_dialog_factory_qt.cpp
@@ -0,0 +1,185 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtWebEngine module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://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.LGPL3 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-3.0.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 (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "select_file_dialog_factory_qt.h"
+
+#include "content/browser/web_contents/web_contents_impl.h"
+#include "file_picker_controller.h"
+#include "type_conversion.h"
+#include "ui/shell_dialogs/select_file_dialog.h"
+#include "web_contents_adapter_client.h"
+#include "web_contents_view_qt.h"
+
+#include <QSharedPointer>
+#include <QTimer>
+
+namespace QtWebEngineCore {
+
+SelectFilePolicyQt::SelectFilePolicyQt(content::WebContents *source_contents)
+    : m_webContents(source_contents)
+{
+}
+
+SelectFilePolicyQt::~SelectFilePolicyQt() { }
+
+bool SelectFilePolicyQt::CanOpenSelectFileDialog()
+{
+    return true;
+}
+
+void SelectFilePolicyQt::SelectFileDenied() { }
+
+content::WebContents *SelectFilePolicyQt::webContents()
+{
+    return m_webContents;
+}
+
+static FilePickerController::FileChooserMode toFileChooserMode(ui::SelectFileDialog::Type type)
+{
+    switch (type) {
+    case ui::SelectFileDialog::Type::SELECT_FOLDER:
+    case ui::SelectFileDialog::Type::SELECT_UPLOAD_FOLDER:
+    case ui::SelectFileDialog::Type::SELECT_EXISTING_FOLDER:
+        return FilePickerController::FileChooserMode::UploadFolder;
+    case ui::SelectFileDialog::Type::SELECT_SAVEAS_FILE:
+        return FilePickerController::FileChooserMode::Save;
+    case ui::SelectFileDialog::Type::SELECT_OPEN_FILE:
+        return FilePickerController::FileChooserMode::Open;
+    case ui::SelectFileDialog::Type::SELECT_OPEN_MULTI_FILE:
+    case ui::SelectFileDialog::Type::SELECT_NONE:
+    default:
+        return FilePickerController::FileChooserMode::OpenMultiple;
+        break;
+    }
+}
+
+class SelectFileDialogQt : public ui::SelectFileDialog
+{
+public:
+    SelectFileDialogQt(Listener *, std::unique_ptr<ui::SelectFilePolicy>,
+                       WebContentsAdapterClient *);
+
+    // ui::SelectFileDialog implementation:
+    bool IsRunning(gfx::NativeWindow) const override;
+    void ListenerDestroyed() override;
+    void SelectFileImpl(Type type, const base::string16 &title, const base::FilePath &default_path,
+                        const FileTypeInfo *file_types, int file_type_index,
+                        const base::FilePath::StringType &default_extension,
+                        gfx::NativeWindow owning_window, void *params) override;
+    bool HasMultipleFileTypeChoicesImpl() override;
+
+private:
+    WebContentsAdapterClient *m_client;
+    QSharedPointer<FilePickerController> m_filePickerController;
+
+    DISALLOW_COPY_AND_ASSIGN(SelectFileDialogQt);
+};
+
+SelectFileDialogQt::SelectFileDialogQt(Listener *listener,
+                                       std::unique_ptr<ui::SelectFilePolicy> policy,
+                                       WebContentsAdapterClient *client)
+    : SelectFileDialog(listener, std::move(policy)), m_client(client)
+{
+}
+
+bool SelectFileDialogQt::IsRunning(gfx::NativeWindow) const
+{
+    return listener_;
+}
+
+void SelectFileDialogQt::ListenerDestroyed()
+{
+    listener_ = nullptr;
+}
+
+bool SelectFileDialogQt::HasMultipleFileTypeChoicesImpl()
+{
+    return false;
+}
+
+extern FilePickerController *createFilePickerController(FilePickerController::FileChooserMode mode,
+                                                        ui::SelectFileDialog::Listener *listener,
+                                                        const QString &defaultFileName,
+                                                        const QStringList &acceptedMimeTypes,
+                                                        QObject *parent = nullptr);
+
+void SelectFileDialogQt::SelectFileImpl(Type type, const base::string16 &title,
+                                        const base::FilePath &default_path,
+                                        const FileTypeInfo *file_types, int file_type_index,
+                                        const base::FilePath::StringType &default_extension,
+                                        gfx::NativeWindow owning_window, void *params)
+{
+    Q_UNUSED(title);
+    Q_UNUSED(file_type_index);
+    Q_UNUSED(default_extension);
+    Q_UNUSED(owning_window);
+    Q_UNUSED(params);
+
+    QStringList acceptedSuffixes;
+    if (file_types) {
+        for (const auto &type : file_types->extensions) {
+            for (const auto &extension : type)
+                acceptedSuffixes.append("." + toQt(extension));
+        }
+    }
+
+    m_filePickerController.reset(createFilePickerController(
+            toFileChooserMode(type), listener_, toQt(default_path.value()), acceptedSuffixes));
+    QTimer::singleShot(0, [this]() { m_client->runFileChooser(m_filePickerController); });
+}
+
+SelectFileDialogFactoryQt::SelectFileDialogFactoryQt() = default;
+
+SelectFileDialogFactoryQt::~SelectFileDialogFactoryQt() = default;
+
+ui::SelectFileDialog *
+SelectFileDialogFactoryQt::Create(ui::SelectFileDialog::Listener *listener,
+                                  std::unique_ptr<ui::SelectFilePolicy> policy)
+{
+    content::WebContents *webContents =
+            static_cast<SelectFilePolicyQt *>(policy.get())->webContents();
+    WebContentsAdapterClient *client =
+            WebContentsViewQt::from(static_cast<content::WebContentsImpl *>(webContents)->GetView())
+                    ->client();
+    if (!client)
+        return nullptr;
+    return new SelectFileDialogQt(listener, std::move(policy), client);
+}
+
+} // namespace QtWebEngineCore