Revert "Clean up remains of NativeActivity-based Android app support"

This reverts commit cecc926070ee3d2ad6296fc5e0cfcde8642bb140.

Conflicts:
sal/android/lo-bootstrap.c
sal/inc/osl/detail/android-bootstrap.h

1 files changed, 116 insertions, 8 deletions

diff --git a/sal/android/lo-bootstrap.c b/sal/android/lo-bootstrap.c
index 61f2c7671977..9aeb32be4b21 100644
--- a/sal/android/lo-bootstrap.c
+++ b/sal/android/lo-bootstrap.c
@@ -30,22 +30,19 @@
  * instead of those above.
  */
 
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
 #include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
 #include <sys/stat.h>
 #include <sys/time.h>
-#include <time.h>
 
-#include <dlfcn.h>
+#include <unistd.h>
 #include <fcntl.h>
-#include <pthread.h>
+#include <dlfcn.h>
 #include <sys/mman.h>
-#include <unistd.h>
 
-#include <jni.h>
 #include <zlib.h>
+#include <jni.h>
 
 #include <android/log.h>
 
@@ -53,6 +50,12 @@
 
 #include "osl/detail/android-bootstrap.h"
 
+#pragma GCC diagnostic ignored "-Wdeclaration-after-statement"
+
+#include "android_native_app_glue.c"
+
+#pragma GCC diagnostic warning "-Wdeclaration-after-statement"
+
 #undef LOGI
 #undef LOGW
 
@@ -69,6 +72,15 @@ struct engine {
     int dummy;
 };
 
+/* These vars are valid / used only when this library is used from
+ *  NativeActivity-based apps.
+ */
+static struct android_app *app;
+static int (*lo_main)(int, const char **);
+static int lo_main_argc;
+static const char **lo_main_argv;
+static int sleep_time = 0;
+
 /* These are valid / used in all apps. */
 static const char *data_dir;
 static const char *cache_dir;
@@ -266,6 +278,26 @@ setup_assets_tree(void)
     return 1;
 }
 
+static void
+engine_handle_cmd(struct android_app* state,
+                  int32_t cmd)
+{
+    (void) state;
+
+    switch (cmd) {
+    case APP_CMD_SAVE_STATE:
+        break;
+    case APP_CMD_INIT_WINDOW:
+        break;
+    case APP_CMD_TERM_WINDOW:
+        break;
+    case APP_CMD_GAINED_FOCUS:
+        break;
+    case APP_CMD_LOST_FOCUS:
+        break;
+    }
+}
+
 /* The lo-native-code shared library is always loaded from Java, so this is
  * always called by JNI first.
  */
@@ -372,6 +404,7 @@ get_jni_string_array(JNIEnv *env,
         const char *s = (*env)->GetStringUTFChars(env, (*env)->GetObjectArrayElement(env, strv, i), NULL);
         (*argv)[i] = strdup(s);
         (*env)->ReleaseStringUTFChars(env, (*env)->GetObjectArrayElement(env, strv, i), s);
+        /* LOGI("argv[%d] = %s", i, lo_main_argv[i]); */
     }
     (*argv)[*argc] = NULL;
 
@@ -379,6 +412,26 @@ get_jni_string_array(JNIEnv *env,
 }
 
 
+// public static native boolean setup(Object lo_main_argument,
+//                                    int lo_main_delay);
+
+__attribute__ ((visibility("default")))
+jboolean
+Java_org_libreoffice_android_Bootstrap_setup__Ljava_lang_Object_2I(JNIEnv* env,
+                                                                    jobject clazz,
+                                                                    jobject lo_main_argument,
+                                                                    jint lo_main_delay)
+{
+    (void) clazz;
+
+    if (!get_jni_string_array(env, "setup: lo_main_argument", lo_main_argument, &lo_main_argc, &lo_main_argv))
+        return JNI_FALSE;
+
+    sleep_time = lo_main_delay;
+
+    return JNI_TRUE;
+}
+
 // public static native int getpid();
 
 __attribute__ ((visibility("default")))
@@ -1257,4 +1310,59 @@ lo_get_app_data_dir(void)
     return data_dir;
 }
 
+__attribute__ ((visibility("default")))
+struct android_app *
+lo_get_app(void)
+{
+    return app;
+}
+
+/* Note that android_main() is used only in NativeActivity-based apps.  Only
+ * the android/qa/sc unit test app is such, and it is unclear whether there is
+ * any reason to continue maintaining that buildable.
+ */
+__attribute__ ((visibility("default")))
+void
+android_main(struct android_app* state)
+{
+    jint nRet;
+    JNIEnv *pEnv = NULL;
+    struct engine engine;
+    Dl_info lo_main_info;
+    JavaVMAttachArgs aArgs = {
+        JNI_VERSION_1_2,
+        "LibreOfficeThread",
+        NULL
+    };
+
+    fprintf (stderr, "android_main in thread: %d\n", (int)pthread_self());
+
+    if (sleep_time != 0) {
+        LOGI("android_main: Sleeping for %d seconds, start ndk-gdb NOW if that is your intention", sleep_time);
+        sleep(sleep_time);
+    }
+
+    nRet = (*(*state->activity->vm)->AttachCurrentThreadAsDaemon)(state->activity->vm, &pEnv, &aArgs);
+    fprintf (stderr, "attach thread returned %d %p\n", nRet, pEnv);
+
+    app = state;
+
+    memset(&engine, 0, sizeof(engine));
+    state->userData = &engine;
+    state->onAppCmd = engine_handle_cmd;
+
+    /* Look up lo_main() dynamically even if it is in the same .so as this code,
+     * but that is only in the case for code built to be used in a NativeActivity-based app.
+     */
+    lo_main = dlsym(RTLD_DEFAULT, "lo_main");
+
+    if (dladdr(lo_main, &lo_main_info) != 0) {
+        lo_main_argv[0] = lo_main_info.dli_fname;
+    }
+
+    lo_main(lo_main_argc, lo_main_argv);
+    nRet = (*(*state->activity->vm)->DetachCurrentThread)(state->activity->vm);
+    fprintf (stderr, "exit android_main\n");
+}
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */