From 1bdc2839ddd27a3a4f411bb04b8634620ade1f3e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jaakko=20Ker=C3=A4nen?= <jaakko.keranen@iki.fi>
Date: Thu, 22 Aug 2019 17:14:53 +0300
Subject: [PATCH] Unix: Added stub for file selection dialog

To be implemented with Doomsday's own widgets to adding dependencies to
native UI toolkits.
---
 .../libs/gui/src/dialogs/filedialog_x11.cpp   | 171 ++++++++++++++++++
 1 file changed, 171 insertions(+)
 create mode 100644 doomsday/libs/gui/src/dialogs/filedialog_x11.cpp

diff --git a/doomsday/libs/gui/src/dialogs/filedialog_x11.cpp b/doomsday/libs/gui/src/dialogs/filedialog_x11.cpp
new file mode 100644
index 0000000000..8315a3904f
--- /dev/null
+++ b/doomsday/libs/gui/src/dialogs/filedialog_x11.cpp
@@ -0,0 +1,171 @@
+/** @file filedialog_x11.cpp  Native file chooser dialog.
+ *
+ * @authors Copyright (c) 2019 Jaakko Keränen <jaakko.keranen@iki.fi>
+ *
+ * @par License
+ * LGPL: http://www.gnu.org/licenses/lgpl.html
+ *
+ * <small>This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at your
+ * option) any later version. This program is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
+ * General Public License for more details. You should have received a copy of
+ * the GNU Lesser General Public License along with this program; if not, see:
+ * http://www.gnu.org/licenses</small>
+ */
+
+#include "de/FileDialog"
+
+namespace de {
+
+DE_PIMPL_NOREF(FileDialog)
+{
+    String           title    = "Select File";
+    String           prompt   = "OK";
+    Behaviors        behavior = AcceptFiles;
+    List<NativePath> selection;
+    NativePath       initialLocation;
+    FileTypes        fileTypes; // empty list: eveything allowed
+
+    // using Filters = List<std::pair<Block, Block>>;
+
+    // Filters filters() const
+    // {
+    //     Filters list;
+    //     for (const FileType &fileType : fileTypes)
+    //     {
+    //         const String exts =
+    //             (fileType.extensions ? "*." + String::join(fileType.extensions, ";*.") : DE_STR("*"));
+    //         list << std::make_pair(fileType.label.toUtf16(), exts.toUtf16());
+    //     }
+    //     return list;
+    // }
+};
+
+FileDialog::FileDialog() : d(new Impl)
+{}
+
+void FileDialog::setTitle(const String &title)
+{
+    d->title = title;
+}
+
+void FileDialog::setPrompt(const String &prompt)
+{
+    d->prompt = prompt;
+}
+
+void FileDialog::setBehavior(Behaviors behaviors, FlagOp flagOp)
+{
+    applyFlagOperation(d->behavior, behaviors, flagOp);
+}
+
+void FileDialog::setInitialLocation(const NativePath &initialLocation)
+{
+    d->initialLocation = initialLocation;
+}
+
+void FileDialog::setFileTypes(const FileTypes &fileTypes)
+{
+    d->fileTypes = fileTypes;
+}
+
+NativePath FileDialog::selectedPath() const
+{
+    return d->selection ? d->selection.front() : NativePath();
+}
+
+List<NativePath> FileDialog::selectedPaths() const
+{
+    return d->selection;
+}
+
+bool FileDialog::exec()
+{
+    d->selection.clear();
+
+    // IFileOpenDialog *dlg = nullptr;
+    // if (FAILED(CoCreateInstance(
+    //         CLSID_FileOpenDialog, nullptr, CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&dlg))))
+    // {
+    //     return false;
+    // }
+
+    // // Configure the dialog according to user-specified options.
+    // DWORD options;
+    // dlg->GetOptions(&options);
+    // options |= FOS_FORCEFILESYSTEM;
+    // if (d->behavior & MultipleSelection)
+    // {
+    //     options |= FOS_ALLOWMULTISELECT;
+    // }
+    // if (d->behavior & AcceptFiles)
+    // {
+    //     options |= FOS_FILEMUSTEXIST;
+    // }
+    // if (d->behavior & AcceptDirectories)
+    // {
+    //     options |= FOS_PICKFOLDERS | FOS_PATHMUSTEXIST;
+    // }
+    // dlg->SetOptions(options);
+    // {
+    //     const auto path = d->initialLocation.toString().toUtf16();
+    //     IShellItem *folder = nullptr;
+    //     if (SUCCEEDED(SHCreateItemFromParsingName(path.c_wstr(), nullptr, IID_PPV_ARGS(&folder))))
+    //     {
+    //         dlg->SetDefaultFolder(folder);
+    //         folder->Release();
+    //     }
+    // }
+    // dlg->SetTitle(d->title.toUtf16().c_wstr());
+    // dlg->SetOkButtonLabel(d->prompt.toUtf16().c_wstr());
+    // if (d->fileTypes)
+    // {
+    //     List<COMDLG_FILTERSPEC> filters;
+    //     const auto strings = d->filters();
+    //     for (const auto &str : strings)
+    //     {
+    //         COMDLG_FILTERSPEC spec;
+    //         spec.pszName = str.first.c_wstr();
+    //         spec.pszSpec = str.second.c_wstr();
+    //         filters << spec;
+    //     }
+    //     dlg->SetFileTypes(UINT(filters.size()), filters.data());
+    // }
+
+    // if (SUCCEEDED(dlg->Show(nullptr)))
+    // {
+    //     IShellItemArray *results = nullptr;
+    //     dlg->GetResults(&results);
+    //     if (results)
+    //     {
+    //         DWORD resultCount = 0;
+    //         results->GetCount(&resultCount);
+    //         for (unsigned i = 0; i < resultCount; ++i)
+    //         {
+    //             IShellItem *result = nullptr;
+    //             if (SUCCEEDED(results->GetItemAt(i, &result)))
+    //             {
+    //                 PWSTR itemPath;
+    //                 if (SUCCEEDED(result->GetDisplayName(SIGDN_FILESYSPATH, &itemPath)))
+    //                 {
+    //                     d->selection << NativePath(
+    //                         String::fromUtf16(Block(itemPath, 2 * (wcslen(itemPath) + 1))));
+    //                     CoTaskMemFree(itemPath);
+    //                 }
+    //                 result->Release();
+    //             }
+    //         }
+    //         results->Release();
+    //     }
+    // }
+
+    // // Cleanup.
+    // dlg->Release();
+
+    return !d->selection.empty();
+}
+
+} // namespace de