am: Allow applets to push multiple and different channels of data

src/core/frontend/applets/software_keyboard.cpp

@@ -9,14 +9,12 @@
 namespace Core::Frontend {
 SoftwareKeyboardApplet::~SoftwareKeyboardApplet() = default;
 
-bool DefaultSoftwareKeyboardApplet::GetText(SoftwareKeyboardParameters parameters,
-                                            std::u16string& text) const {
+std::optional<std::u16string> DefaultSoftwareKeyboardApplet::GetText(
+    SoftwareKeyboardParameters parameters) const {
     if (parameters.initial_text.empty())
-        text = u"yuzu";
-    else
-        text = parameters.initial_text;
+        return u"yuzu";
 
-    return true;
+    return parameters.initial_text;
 }
 
 void DefaultSoftwareKeyboardApplet::SendTextCheckDialog(std::u16string error_message) const {

src/core/frontend/applets/software_keyboard.h

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <optional>
 #include <string>
 #include "common/bit_field.h"
 #include "common/common_types.h"
@@ -35,13 +36,13 @@ class SoftwareKeyboardApplet {
 public:
     virtual ~SoftwareKeyboardApplet();
 
-    virtual bool GetText(SoftwareKeyboardParameters parameters, std::u16string& text) const = 0;
+    virtual std::optional<std::u16string> GetText(SoftwareKeyboardParameters parameters) const = 0;
     virtual void SendTextCheckDialog(std::u16string error_message) const = 0;
 };
 
 class DefaultSoftwareKeyboardApplet final : public SoftwareKeyboardApplet {
 public:
-    bool GetText(SoftwareKeyboardParameters parameters, std::u16string& text) const override;
+    std::optional<std::u16string> GetText(SoftwareKeyboardParameters parameters) const override;
     void SendTextCheckDialog(std::u16string error_message) const override;
 };
 

src/core/hle/service/am/am.cpp

@@ -566,6 +566,16 @@ public:
     }
 
 private:
+    void AppletStorageProxyOutData(IStorage storage) {
+        storage_stack.push_back(std::make_shared<IStorage>(storage));
+        pop_out_data_event->Signal();
+    }
+
+    void AppletStorageProxyOutInteractiveData(IStorage storage) {
+        interactive_storage_stack.push_back(std::make_shared<IStorage>(storage));
+        pop_interactive_out_data_event->Signal();
+    }
+
     void GetAppletStateChangedEvent(Kernel::HLERequestContext& ctx) {
         state_changed_event->Signal();
 
@@ -591,17 +601,11 @@ private:
         ASSERT(applet != nullptr);
 
         applet->Initialize(storage_stack);
-        const auto data = std::make_shared<IStorage>(applet->Execute());
+        applet->Execute(
+            [this](IStorage storage) { AppletStorageProxyOutData(storage); },
+            [this](IStorage storage) { AppletStorageProxyOutInteractiveData(storage); });
         state_changed_event->Signal();
 
-        if (applet->TransactionComplete()) {
-            storage_stack.push_back(data);
-            pop_out_data_event->Signal();
-        } else {
-            interactive_storage_stack.push_back(data);
-            pop_interactive_out_data_event->Signal();
-        }
-
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
     }
@@ -632,17 +636,11 @@ private:
 
         ASSERT(applet->IsInitialized());
         applet->ReceiveInteractiveData(interactive_storage_stack.back());
-        const auto data = std::make_shared<IStorage>(applet->Execute());
+        applet->Execute(
+            [this](IStorage storage) { AppletStorageProxyOutData(storage); },
+            [this](IStorage storage) { AppletStorageProxyOutInteractiveData(storage); });
         state_changed_event->Signal();
 
-        if (applet->TransactionComplete()) {
-            storage_stack.push_back(data);
-            pop_out_data_event->Signal();
-        } else {
-            interactive_storage_stack.push_back(data);
-            pop_interactive_out_data_event->Signal();
-        }
-
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
 

src/core/hle/service/am/applets/applets.h

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <functional>
 #include <memory>
 #include <vector>
 #include "common/swap.h"
@@ -20,6 +21,8 @@ class IStorage;
 
 namespace Applets {
 
+using AppletStorageProxyFunction = std::function<void(IStorage)>;
+
 class Applet {
 public:
     Applet();
@@ -30,7 +33,8 @@ public:
     virtual bool TransactionComplete() const = 0;
     virtual ResultCode GetStatus() const = 0;
     virtual void ReceiveInteractiveData(std::shared_ptr<IStorage> storage) = 0;
-    virtual IStorage Execute() = 0;
+    virtual void Execute(AppletStorageProxyFunction out_data,
+                         AppletStorageProxyFunction out_interactive_data) = 0;
 
     bool IsInitialized() const {
         return initialized;

src/core/hle/service/am/applets/software_keyboard.cpp

@@ -87,42 +87,37 @@ void SoftwareKeyboard::ReceiveInteractiveData(std::shared_ptr<IStorage> storage)
     }
 }
 
-IStorage SoftwareKeyboard::Execute() {
+void SoftwareKeyboard::Execute(AppletStorageProxyFunction out_data,
+                               AppletStorageProxyFunction out_interactive_data) {
     if (complete)
-        return IStorage{final_data};
+        return;
 
     const auto& frontend{Core::System::GetInstance().GetSoftwareKeyboard()};
 
     const auto parameters = ConvertToFrontendParameters(config, initial_text);
 
-    std::u16string text;
-    const auto success = frontend.GetText(parameters, text);
+    const auto res = frontend.GetText(parameters);
 
     std::vector<u8> output(SWKBD_OUTPUT_BUFFER_SIZE);
 
-    if (success) {
+    if (res.has_value()) {
         if (config.text_check) {
-            const auto size = static_cast<u32>(text.size() * 2 + 4);
+            const auto size = static_cast<u32>(res->size() * 2 + 4);
             std::memcpy(output.data(), &size, sizeof(u32));
         } else {
             output[0] = 1;
         }
 
-        std::memcpy(output.data() + 4, text.data(),
-                    std::min(text.size() * 2, SWKBD_OUTPUT_BUFFER_SIZE - 4));
+        std::memcpy(output.data() + 4, res->data(),
+                    std::min(res->size() * 2, SWKBD_OUTPUT_BUFFER_SIZE - 4));
     } else {
         complete = true;
-        final_data = std::move(output);
-        return IStorage{final_data};
+        out_data(IStorage{output});
+        return;
     }
 
     complete = !config.text_check;
 
-    if (complete) {
-        final_data = std::move(output);
-        return IStorage{final_data};
-    }
-
-    return IStorage{output};
+    (complete ? out_data : out_interactive_data)(IStorage{output});
 }
 } // namespace Service::AM::Applets

src/core/hle/service/am/applets/software_keyboard.h

@@ -54,7 +54,8 @@ public:
     bool TransactionComplete() const override;
     ResultCode GetStatus() const override;
     void ReceiveInteractiveData(std::shared_ptr<IStorage> storage) override;
-    IStorage Execute() override;
+    void Execute(AppletStorageProxyFunction out_data,
+                 AppletStorageProxyFunction out_interactive_data) override;
 
 private:
     KeyboardConfig config;