3 files changed, 130 insertions, 0 deletions

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 03ecb2c8c..a355eaca6 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -154,6 +154,8 @@ add_library(core STATIC
     hle/service/am/applet_oe.h
     hle/service/am/applets/applets.cpp
     hle/service/am/applets/applets.h
+    hle/service/am/applets/software_keyboard.cpp
+    hle/service/am/applets/software_keyboard.h
     hle/service/am/idle.cpp
     hle/service/am/idle.h
     hle/service/am/omm.cpp
diff --git a/src/core/hle/service/am/applets/software_keyboard.cpp b/src/core/hle/service/am/applets/software_keyboard.cpp
new file mode 100644
index 000000000..ad1797ef1
--- /dev/null
+++ b/src/core/hle/service/am/applets/software_keyboard.cpp
@@ -0,0 +1,71 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/string_util.h"
+#include "core/frontend/applets/software_keyboard.h"
+#include "core/hle/service/am/am.h"
+#include "core/hle/service/am/applets/software_keyboard.h"
+
+namespace Service::AM::Applets {
+
+constexpr std::size_t SWKBD_OUTPUT_BUFFER_SIZE = 0x7D8;
+constexpr std::size_t DEFAULT_MAX_LENGTH = 500;
+
+static Frontend::SoftwareKeyboardApplet::Parameters ConvertToFrontendParameters(
+    KeyboardConfig config, std::u16string initial_text) {
+    Frontend::SoftwareKeyboardApplet::Parameters params{};
+
+    params.submit_text = Common::UTF16StringFromFixedZeroTerminatedBuffer(
+        config.submit_text.data(), config.submit_text.size());
+    params.header_text = Common::UTF16StringFromFixedZeroTerminatedBuffer(
+        config.header_text.data(), config.header_text.size());
+    params.sub_text = Common::UTF16StringFromFixedZeroTerminatedBuffer(config.sub_text.data(),
+                                                                       config.sub_text.size());
+    params.guide_text = Common::UTF16StringFromFixedZeroTerminatedBuffer(config.guide_text.data(),
+                                                                         config.guide_text.size());
+    params.initial_text = initial_text;
+    params.max_length = config.length_limit == 0 ? DEFAULT_MAX_LENGTH : config.length_limit;
+    params.password = static_cast<bool>(config.is_password);
+    params.cursor_at_beginning = static_cast<bool>(config.initial_cursor_position);
+    params.value = static_cast<u8>(config.keyset_disable_bitmask);
+
+    return params;
+}
+
+void SoftwareKeyboard::Initialize(std::vector<std::shared_ptr<IStorage>> storage_) {
+    Applet::Initialize(std::move(storage_));
+
+    ASSERT(storage_stack.size() >= 2);
+    const auto& keyboard_config = storage_stack[1]->GetData();
+    ASSERT(keyboard_config.size() >= sizeof(KeyboardConfig));
+    std::memcpy(&config, keyboard_config.data(), sizeof(KeyboardConfig));
+
+    ASSERT_MSG(config.text_check == 0, "Text check software keyboard mode is not implemented!");
+
+    const auto& work_buffer = storage_stack[2]->GetData();
+    std::memcpy(initial_text.data(), work_buffer.data() + config.initial_string_offset,
+                config.initial_string_size);
+}
+
+IStorage SoftwareKeyboard::Execute() {
+    const auto frontend{GetSoftwareKeyboard()};
+    ASSERT(frontend != nullptr);
+
+    const auto parameters = ConvertToFrontendParameters(config, initial_text);
+
+    std::u16string text;
+    const auto success = frontend->GetText(parameters, text);
+
+    std::vector<u8> output(SWKBD_OUTPUT_BUFFER_SIZE);
+
+    if (success) {
+        output[0] = 1;
+        std::memcpy(output.data() + 4, text.data(),
+                    std::min<std::size_t>(text.size() * 2, SWKBD_OUTPUT_BUFFER_SIZE - 4));
+    }
+
+    return IStorage{output};
+}
+} // namespace Service::AM::Applets
diff --git a/src/core/hle/service/am/applets/software_keyboard.h b/src/core/hle/service/am/applets/software_keyboard.h
new file mode 100644
index 000000000..9a37ba45f
--- /dev/null
+++ b/src/core/hle/service/am/applets/software_keyboard.h
@@ -0,0 +1,57 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_funcs.h"
+#include "core/hle/service/am/applets/applets.h"
+
+namespace Service::AM::Applets {
+
+enum class KeysetDisable : u32 {
+    Space = 0x02,
+    Address = 0x04,
+    Percent = 0x08,
+    Slashes = 0x10,
+    Numbers = 0x40,
+    DownloadCode = 0x80,
+};
+
+struct KeyboardConfig {
+    INSERT_PADDING_BYTES(4);
+    std::array<char16_t, 9> submit_text;
+    u16_le left_symbol_key;
+    u16_le right_symbol_key;
+    INSERT_PADDING_BYTES(1);
+    KeysetDisable keyset_disable_bitmask;
+    u32_le initial_cursor_position;
+    std::array<char16_t, 65> header_text;
+    std::array<char16_t, 129> sub_text;
+    std::array<char16_t, 257> guide_text;
+    u32_le length_limit;
+    INSERT_PADDING_BYTES(4);
+    u32_le is_password;
+    INSERT_PADDING_BYTES(6);
+    bool draw_background;
+    u32_le initial_string_offset;
+    u32_le initial_string_size;
+    u32_le user_dictionary_offset;
+    u32_le user_dictionary_size;
+    bool text_check;
+    u64_le text_check_callback;
+};
+static_assert(sizeof(KeyboardConfig) == 0x3E0, "KeyboardConfig has incorrect size.");
+
+class SoftwareKeyboard final : public Applet {
+public:
+    void Initialize(std::vector<std::shared_ptr<IStorage>> storage) override;
+
+    IStorage Execute() override;
+
+private:
+    KeyboardConfig config;
+    std::u16string initial_text;
+};
+
+} // namespace Service::AM::Applets