software_keyboard: Make GetText asynchronous

a

src/core/frontend/applets/software_keyboard.cpp

@@ -9,12 +9,13 @@
 namespace Core::Frontend {
 SoftwareKeyboardApplet::~SoftwareKeyboardApplet() = default;
 
-std::optional<std::u16string> DefaultSoftwareKeyboardApplet::GetText(
+void DefaultSoftwareKeyboardApplet::RequestText(
+    std::function<void(std::optional<std::u16string>)> out,
     SoftwareKeyboardParameters parameters) const {
     if (parameters.initial_text.empty())
-        return u"yuzu";
+        out(u"yuzu");
 
-    return parameters.initial_text;
+    out(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 <functional>
 #include <optional>
 #include <string>
 #include "common/bit_field.h"
@@ -36,13 +37,15 @@ class SoftwareKeyboardApplet {
 public:
     virtual ~SoftwareKeyboardApplet();
 
-    virtual std::optional<std::u16string> GetText(SoftwareKeyboardParameters parameters) const = 0;
+    virtual void RequestText(std::function<void(std::optional<std::u16string>)> out,
+                             SoftwareKeyboardParameters parameters) const = 0;
     virtual void SendTextCheckDialog(std::u16string error_message) const = 0;
 };
 
 class DefaultSoftwareKeyboardApplet final : public SoftwareKeyboardApplet {
 public:
-    std::optional<std::u16string> GetText(SoftwareKeyboardParameters parameters) const override;
+    void RequestText(std::function<void(std::optional<std::u16string>)> out,
+                     SoftwareKeyboardParameters parameters) const override;
     void SendTextCheckDialog(std::u16string error_message) const override;
 };
 

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

@@ -718,7 +718,7 @@ void IStorageAccessor::Write(Kernel::HLERequestContext& ctx) {
     const u64 offset{rp.Pop<u64>()};
     const std::vector<u8> data{ctx.ReadBuffer()};
 
-    const auto size = std::min(data.size(), backing.buffer.size() - offset);
+    const auto size = std::min<std::size_t>(data.size(), backing.buffer.size() - offset);
 
     std::memcpy(&backing.buffer[offset], data.data(), size);
 

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

@@ -43,6 +43,10 @@ SoftwareKeyboard::SoftwareKeyboard() = default;
 SoftwareKeyboard::~SoftwareKeyboard() = default;
 
 void SoftwareKeyboard::Initialize(std::vector<std::shared_ptr<IStorage>> storage_) {
+    complete = false;
+    initial_text.clear();
+    final_data.clear();
+
     Applet::Initialize(std::move(storage_));
 
     ASSERT(storage_stack.size() >= 2);
@@ -96,20 +100,25 @@ void SoftwareKeyboard::Execute(AppletStorageProxyFunction out_data,
 
     const auto parameters = ConvertToFrontendParameters(config, initial_text);
 
-    const auto res = frontend.GetText(parameters);
+    this->out_data = out_data;
+    this->out_interactive_data = out_interactive_data;
+    frontend.RequestText([this](std::optional<std::u16string> text) { WriteText(text); },
+                         parameters);
+}
 
+void SoftwareKeyboard::WriteText(std::optional<std::u16string> text) {
     std::vector<u8> output(SWKBD_OUTPUT_BUFFER_SIZE);
 
-    if (res.has_value()) {
+    if (text.has_value()) {
         if (config.text_check) {
-            const auto size = static_cast<u32>(res->size() * 2 + 4);
+            const auto size = static_cast<u32>(text->size() * 2 + 4);
             std::memcpy(output.data(), &size, sizeof(u32));
         } else {
             output[0] = 1;
         }
 
-        std::memcpy(output.data() + 4, res->data(),
-                    std::min(res->size() * 2, SWKBD_OUTPUT_BUFFER_SIZE - 4));
+        std::memcpy(output.data() + 4, text->data(),
+                    std::min(text->size() * 2, SWKBD_OUTPUT_BUFFER_SIZE - 4));
     } else {
         complete = true;
         out_data(IStorage{output});

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

@@ -57,11 +57,16 @@ public:
     void Execute(AppletStorageProxyFunction out_data,
                  AppletStorageProxyFunction out_interactive_data) override;
 
+    void WriteText(std::optional<std::u16string> text);
+
 private:
     KeyboardConfig config;
     std::u16string initial_text;
     bool complete = false;
     std::vector<u8> final_data;
+
+    AppletStorageProxyFunction out_data;
+    AppletStorageProxyFunction out_interactive_data;
 };
 
 } // namespace Service::AM::Applets