From 05e641c04efd5fbea1c61089b5392db106ccc044 Mon Sep 17 00:00:00 2001
From: Leon Styhre <leon@leonstyhre.com>
Date: Mon, 20 May 2024 19:49:28 +0200
Subject: [PATCH] (Android) Added experimental support for running ES-DE as the
 home app

---
 es-app/src/guis/GuiMenu.cpp  | 41 ++++++++++++++++++++++++++----------
 es-app/src/main.cpp          |  8 +++++++
 es-core/src/InputManager.cpp |  9 +++++---
 3 files changed, 44 insertions(+), 14 deletions(-)

diff --git a/es-app/src/guis/GuiMenu.cpp b/es-app/src/guis/GuiMenu.cpp
index 0ef4d627c..b92697a40 100644
--- a/es-app/src/guis/GuiMenu.cpp
+++ b/es-app/src/guis/GuiMenu.cpp
@@ -40,6 +40,7 @@
 
 #if defined(__ANDROID__)
 #include "InputOverlay.h"
+#include "utils/PlatformUtilAndroid.h"
 #endif
 
 #include <SDL2/SDL_events.h>
@@ -76,8 +77,11 @@ GuiMenu::GuiMenu()
 
     if (!Settings::getInstance()->getBool("ForceKiosk") &&
         Settings::getInstance()->getString("UIMode") != "kiosk") {
-#if defined(__APPLE__) || defined(__ANDROID__)
+#if defined(__APPLE__)
         addEntry("QUIT ES-DE", mMenuColorPrimary, false, [this] { openQuitMenu(); });
+#elif defined(__ANDROID__)
+        if (!AndroidVariables::sIsHomeApp)
+            addEntry("QUIT ES-DE", mMenuColorPrimary, false, [this] { openQuitMenu(); });
 #else
         if (Settings::getInstance()->getBool("ShowQuitMenu"))
             addEntry("QUIT", mMenuColorPrimary, true, [this] { openQuitMenu(); });
@@ -1791,16 +1795,31 @@ void GuiMenu::openOtherOptions()
 #endif
 
 #if defined(__ANDROID__)
-    // Whether swiping or pressing back should exit the application.
-    auto backEventAppExit = std::make_shared<SwitchComponent>();
-    backEventAppExit->setState(Settings::getInstance()->getBool("BackEventAppExit"));
-    s->addWithLabel("BACK BUTTON/BACK SWIPE EXITS APP", backEventAppExit);
-    s->addSaveFunc([backEventAppExit, s] {
-        if (backEventAppExit->getState() != Settings::getInstance()->getBool("BackEventAppExit")) {
-            Settings::getInstance()->setBool("BackEventAppExit", backEventAppExit->getState());
-            s->setNeedsSaving();
-        }
-    });
+    if (!AndroidVariables::sIsHomeApp) {
+        // Whether swiping or pressing back should exit the application.
+        auto backEventAppExit = std::make_shared<SwitchComponent>();
+        backEventAppExit->setState(Settings::getInstance()->getBool("BackEventAppExit"));
+        s->addWithLabel("BACK BUTTON/BACK SWIPE EXITS APP", backEventAppExit);
+        s->addSaveFunc([backEventAppExit, s] {
+            if (backEventAppExit->getState() !=
+                Settings::getInstance()->getBool("BackEventAppExit")) {
+                Settings::getInstance()->setBool("BackEventAppExit", backEventAppExit->getState());
+                s->setNeedsSaving();
+            }
+        });
+    }
+    else {
+        // If we're running as the Android home app then we don't allow the application to quit,
+        // so simply add a disabled dummy switch in this case.
+        auto backEventAppExit = std::make_shared<SwitchComponent>();
+        s->addWithLabel("BACK BUTTON/BACK SWIPE EXITS APP", backEventAppExit);
+        backEventAppExit->setEnabled(false);
+        backEventAppExit->setState(false);
+        backEventAppExit->setOpacity(DISABLED_OPACITY);
+        backEventAppExit->getParent()
+            ->getChild(backEventAppExit->getChildIndex() - 1)
+            ->setOpacity(DISABLED_OPACITY);
+    }
 #endif
 
     if (Settings::getInstance()->getBool("DebugFlag")) {
diff --git a/es-app/src/main.cpp b/es-app/src/main.cpp
index c1e90562f..4d7983701 100644
--- a/es-app/src/main.cpp
+++ b/es-app/src/main.cpp
@@ -701,6 +701,14 @@ int main(int argc, char* argv[])
         LOG(LogInfo) << applicationName << " " << PROGRAM_VERSION_STRING << "-"
                      << ANDROID_VERSION_CODE << " (r" << PROGRAM_RELEASE_NUMBER << "), built "
                      << PROGRAM_BUILT_STRING;
+
+        if (AndroidVariables::sIsHomeApp) {
+            LOG(LogInfo) << "Running as the Android home app";
+        }
+        else {
+            LOG(LogInfo) << "Running as a regular Android app";
+        }
+
 #else
         LOG(LogInfo) << applicationName << " " << PROGRAM_VERSION_STRING << " (r"
                      << PROGRAM_RELEASE_NUMBER << "), built " << PROGRAM_BUILT_STRING;
diff --git a/es-core/src/InputManager.cpp b/es-core/src/InputManager.cpp
index ed40c1fa2..d0e9d078e 100644
--- a/es-core/src/InputManager.cpp
+++ b/es-core/src/InputManager.cpp
@@ -26,6 +26,7 @@
 
 #if defined(__ANDROID__)
 #define TOUCH_GUID_STRING "-3"
+#include "utils/PlatformUtilAndroid.h"
 #endif
 
 namespace
@@ -477,9 +478,11 @@ bool InputManager::parseEvent(const SDL_Event& event)
                 return false;
 
 #if defined(__ANDROID__)
-            // Quit application if the back button is pressed or if the back gesture is used.
+            // Quit application if the back button is pressed or if the back gesture is used,
+            // unless we're set as the Android home app.
             if (event.key.keysym.sym == SDLK_AC_BACK &&
-                Settings::getInstance()->getBool("BackEventAppExit")) {
+                Settings::getInstance()->getBool("BackEventAppExit") &&
+                !AndroidVariables::sIsHomeApp) {
                 SDL_Event quit {};
                 quit.type = SDL_QUIT;
                 SDL_PushEvent(&quit);
@@ -493,7 +496,7 @@ bool InputManager::parseEvent(const SDL_Event& event)
 #if defined(__APPLE__)
             if (quitShortcut != "CmdQ") {
 #elif defined(__ANDROID__)
-            if (true) {
+            if (!AndroidVariables::sIsHomeApp) {
 #else
             if (quitShortcut != "AltF4") {
 #endif