FullscreenUI: Use native file selector on Flatpak

src/core/fullscreen_ui.cpp

@@ -928,8 +928,8 @@ void FullscreenUI::DestroyResources()
 
 ImGuiFullscreen::FileSelectorFilters FullscreenUI::GetDiscImageFilters()
 {
-  return {"*.bin",    "*.cue", "*.iso", "*.img",     "*.chd", "*.ecm", "*.mds", "*.psexe",
-          "*.ps-exe", "*.exe", "*.psf", "*.minipsf", "*.m3u", "*.pbp", "*.PBP"};
+  return {"*.bin",   "*.cue",    "*.iso", "*.img", "*.chd",     "*.ecm", "*.mds",
+          "*.psexe", "*.ps-exe", "*.exe", "*.psf", "*.minipsf", "*.m3u", "*.pbp"};
 }
 
 void FullscreenUI::DoStartPath(std::string path, std::string state, std::optional<bool> fast_boot)

src/duckstation-qt/qthost.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2019-2023 Connor McLaughlin <stenzek@gmail.com>
+// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
 // SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
 
 #include "qthost.h"
@@ -36,6 +36,7 @@
 
 #include "util/audio_stream.h"
 #include "util/http_downloader.h"
+#include "util/imgui_fullscreen.h"
 #include "util/imgui_manager.h"
 #include "util/ini_settings_interface.h"
 #include "util/input_manager.h"
@@ -1566,6 +1567,60 @@ void Host::OnCoverDownloaderOpenRequested()
   emit g_emu_thread->onCoverDownloaderOpenRequested();
 }
 
+bool Host::ShouldPreferHostFileSelector()
+{
+#ifdef __linux__
+  // If running inside a flatpak, we want to use native selectors/portals.
+  return (std::getenv("container") != nullptr);
+#else
+  return false;
+#endif
+}
+
+void Host::OpenHostFileSelectorAsync(std::string_view title, bool select_directory, FileSelectorCallback callback,
+                                     FileSelectorFilters filters /* = FileSelectorFilters() */,
+                                     std::string_view initial_directory /* = std::string_view() */)
+{
+  const bool from_cpu_thread = g_emu_thread->isOnThread();
+
+  QString filters_str;
+  if (!filters.empty())
+  {
+    filters_str.append(QStringLiteral("All File Types (%1)")
+                         .arg(QString::fromStdString(StringUtil::JoinString(filters.begin(), filters.end(), " "))));
+    for (const std::string& filter : filters)
+    {
+      filters_str.append(
+        QStringLiteral(";;%1 Files (%2)")
+          .arg(
+            QtUtils::StringViewToQString(std::string_view(filter).substr(filter.starts_with("*.") ? 2 : 0)).toUpper())
+          .arg(QString::fromStdString(filter)));
+    }
+  }
+
+  QtHost::RunOnUIThread([title = QtUtils::StringViewToQString(title), select_directory, callback = std::move(callback),
+                         filters_str = std::move(filters_str),
+                         initial_directory = QtUtils::StringViewToQString(initial_directory),
+                         from_cpu_thread]() mutable {
+    auto lock = g_main_window->pauseAndLockSystem();
+
+    QString path;
+
+    if (select_directory)
+      path = QFileDialog::getExistingDirectory(lock.getDialogParent(), title, initial_directory);
+    else
+      path = QFileDialog::getOpenFileName(lock.getDialogParent(), title, initial_directory, filters_str);
+
+    if (!path.isEmpty())
+      path = QDir::toNativeSeparators(path);
+
+    if (from_cpu_thread)
+      Host::RunOnCPUThread([callback = std::move(callback), path = path.toStdString()]() { callback(path); });
+    else
+      callback(path.toStdString());
+  });
+}
+
 void EmuThread::doBackgroundControllerPoll()
 {
   System::Internal::IdlePollUpdate();

src/duckstation-regtest/regtest_host.cpp

@@ -12,6 +12,7 @@
 #include "scmversion/scmversion.h"
 
 #include "util/gpu_device.h"
+#include "util/imgui_fullscreen.h"
 #include "util/imgui_manager.h"
 #include "util/input_manager.h"
 #include "util/platform_misc.h"
@@ -387,6 +388,18 @@ void Host::OnCoverDownloaderOpenRequested()
   // noop
 }
 
+bool Host::ShouldPreferHostFileSelector()
+{
+  return false;
+}
+
+void Host::OpenHostFileSelectorAsync(std::string_view title, bool select_directory, FileSelectorCallback callback,
+                                     FileSelectorFilters filters /* = FileSelectorFilters() */,
+                                     std::string_view initial_directory /* = std::string_view() */)
+{
+  callback(std::string());
+}
+
 std::optional<u32> InputManager::ConvertHostKeyboardStringToCode(std::string_view str)
 {
   return std::nullopt;

src/util/imgui_fullscreen.cpp

@@ -7,6 +7,7 @@
 #include "gpu_device.h"
 #include "image.h"
 #include "imgui_animated.h"
+#include "imgui_manager.h"
 
 #include "common/assert.h"
 #include "common/easing.h"
@@ -2072,7 +2073,7 @@ void ImGuiFullscreen::PopulateFileSelectorItems()
         if (s_file_selector_filters.empty() ||
             std::none_of(s_file_selector_filters.begin(), s_file_selector_filters.end(),
                          [&fd](const std::string& filter) {
-                           return StringUtil::WildcardMatch(fd.FileName.c_str(), filter.c_str());
+                           return StringUtil::WildcardMatch(fd.FileName.c_str(), filter.c_str(), false);
                          }))
         {
           continue;
@@ -2102,6 +2103,16 @@ bool ImGuiFullscreen::IsFileSelectorOpen()
 void ImGuiFullscreen::OpenFileSelector(std::string_view title, bool select_directory, FileSelectorCallback callback,
                                        FileSelectorFilters filters, std::string initial_directory)
 {
+  if (initial_directory.empty() || !FileSystem::DirectoryExists(initial_directory.c_str()))
+    initial_directory = FileSystem::GetWorkingDirectory();
+
+  if (Host::ShouldPreferHostFileSelector())
+  {
+    Host::OpenHostFileSelectorAsync(ImGuiManager::StripIconCharacters(title), select_directory, std::move(callback),
+                                    std::move(filters), initial_directory);
+    return;
+  }
+
   if (s_file_selector_open)
     CloseFileSelector();
 
@@ -2111,8 +2122,6 @@ void ImGuiFullscreen::OpenFileSelector(std::string_view title, bool select_direc
   s_file_selector_callback = std::move(callback);
   s_file_selector_filters = std::move(filters);
 
-  if (initial_directory.empty() || !FileSystem::DirectoryExists(initial_directory.c_str()))
-    initial_directory = FileSystem::GetWorkingDirectory();
   SetFileSelectorDirectory(std::move(initial_directory));
   QueueResetFocus();
 }

src/util/imgui_fullscreen.h

@@ -314,3 +314,16 @@ void GetChoiceDialogHelpText(SmallStringBase& dest);
 void GetFileSelectorHelpText(SmallStringBase& dest);
 void GetInputDialogHelpText(SmallStringBase& dest);
 } // namespace ImGuiFullscreen
+
+// Host UI triggers from Big Picture mode.
+namespace Host {
+/// Returns true if native file dialogs should be preferred over Big Picture.
+bool ShouldPreferHostFileSelector();
+
+/// Opens a file selector dialog.
+using FileSelectorCallback = std::function<void(const std::string& path)>;
+using FileSelectorFilters = std::vector<std::string>;
+void OpenHostFileSelectorAsync(std::string_view title, bool select_directory, FileSelectorCallback callback,
+                               FileSelectorFilters filters = FileSelectorFilters(),
+                               std::string_view initial_directory = std::string_view());
+} // namespace Host

src/util/imgui_manager.cpp

@@ -1123,3 +1123,25 @@ void ImGuiManager::SetSoftwareCursorPosition(u32 index, float pos_x, float pos_y
   sc.pos.first = pos_x;
   sc.pos.second = pos_y;
 }
+
+std::string ImGuiManager::StripIconCharacters(std::string_view str)
+{
+  std::string result;
+  result.reserve(str.length());
+
+  for (size_t offset = 0; offset < str.length();)
+  {
+    char32_t utf;
+    offset += StringUtil::DecodeUTF8(str, offset, &utf);
+
+    // icon if outside BMP/SMP/TIP, or inside private use area
+    if (utf > 0x32FFF || (utf >= 0xE000 && utf <= 0xF8FF))
+      continue;
+
+    StringUtil::EncodeAndAppendUTF8(result, utf);
+  }
+
+  StringUtil::StripWhitespace(&result);
+
+  return result;
+}

src/util/imgui_manager.h

@@ -106,6 +106,9 @@ void SetSoftwareCursorPosition(u32 index, float pos_x, float pos_y);
 
 /// Adds software cursors to ImGui render list.
 void RenderSoftwareCursors();
+
+/// Strips icon characters from a string.
+std::string StripIconCharacters(std::string_view str);
 } // namespace ImGuiManager
 
 namespace Host {