android: Introduce LibreOfficeKit.java to bootstrap using LibreOfficeKit.

Change-Id: I5e1758c15684b06ab6809f62f4da6d5f50c071a9

android/Bootstrap/src/org/libreoffice/android/LibreOfficeKit.java

+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+package org.libreoffice.android;
+
+import android.app.Activity;
+import android.content.pm.ApplicationInfo;
+import android.util.Log;
+
+import java.io.File;
+import java.io.InputStream;
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+
+// final because subclassing would be meaningless.
+public final class LibreOfficeKit
+{
+    // private constructor because instantiating would be meaningless
+    private LibreOfficeKit()
+    {
+    }
+
+    private static String TAG = "lo-bootstrap";
+
+    // Native methods in this class are all implemented in
+    // sal/android/lo-bootstrap.c as the lo-bootstrap library is loaded with
+    // System.loadLibrary() and Android's JNI works only to such libraries, it
+    // seems.
+
+    private static native boolean init(String dataDir,
+                                       String cacheDir,
+                                       String apkFile);
+
+    // Extracts files in the .apk that need to be extraced into the app's tree
+    static native void extract_files();
+
+/*
+    // Wrapper for getpid()
+    public static native int getpid();
+
+    // Wrapper for system()
+    public static native void system(String cmdline);
+*/
+    // Wrapper for putenv()
+    public static native void putenv(String string);
+/*
+    // A wrapper for InitVCL() in libvcl (svmain.cxx), called indirectly
+    // through the lo-bootstrap library
+    public static native void initVCL();
+
+    // A wrapper for osl_setCommandArgs(). Before calling
+    // osl_setCommandArgs(), argv[0] is prefixed with the parent directory of
+    // where the lo-bootstrap library is.
+    public static native void setCommandArgs(String[] argv);
+*/
+    // A method that starts a thread to redirect stdout and stderr writes to
+    // the Android logging mechanism, or stops the redirection.
+    public static native boolean redirect_stdio(boolean state);
+/*
+    // The DIB returned by css.awt.XBitmap.getDIB is in BGR_888 form, at least
+    // for Writer documents. We need it in Android's Bitmap.Config.ARGB_888
+    // format, which actually is RGBA_888, whee... At least in Android 4.0.3,
+    // at least on my device. No idea if it is always like that or not, the
+    // documentation sucks.
+    public static native void twiddle_BGR_to_RGBA(byte[] source, int offset, int width, int height, ByteBuffer destination);
+
+    public static native void force_full_alpha_array(byte[] array, int offset, int length);
+
+    public static native void force_full_alpha_bb(ByteBuffer buffer, int offset, int length);
+
+    public static native long new_byte_buffer_wrapper(ByteBuffer bbuffer);
+
+    public static native void delete_byte_buffer_wrapper(long bbw);
+*/
+
+    static boolean init_done = false;
+
+    // This init() method should be called from the upper Java level of
+    // LO-based apps.
+    public static synchronized void init(Activity activity)
+    {
+        if (init_done)
+            return;
+
+        String dataDir = null;
+
+        ApplicationInfo ai = activity.getApplicationInfo();
+        dataDir = ai.dataDir;
+        Log.i(TAG, String.format("dataDir=%s\n", dataDir));
+
+        redirect_stdio(true);
+
+        if (!init(dataDir,
+                  activity.getApplication().getCacheDir().getAbsolutePath(),
+                  activity.getApplication().getPackageResourcePath()))
+            return;
+
+        // Extract files from the .apk that can't be used mmapped directly from it
+        extract_files();
+
+        // If we notice that a fonts.conf file was extracted, automatically
+        // set the FONTCONFIG_FILE env var.
+        InputStream i;
+        try {
+            i = activity.getAssets().open("unpack/etc/fonts/fonts.conf");
+        }
+        catch (java.io.IOException e) {
+            i = null;
+        }
+        putenv("OOO_DISABLE_RECOVERY=1");
+        if (i != null)
+            putenv("FONTCONFIG_FILE=" + dataDir + "/etc/fonts/fonts.conf");
+
+        // TMPDIR is used by osl_getTempDirURL()
+        putenv("TMPDIR=" + activity.getCacheDir().getAbsolutePath());
+
+        init_done = true;
+    }
+
+    // Now with static loading we always have all native code in one native
+    // library which we always call liblo-native-code.so, regardless of the
+    // app. The library has already been unpacked into /data/data/<app
+    // name>/lib at installation time by the package manager.
+    static {
+        System.loadLibrary("lo-native-code");
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

include/osl/detail/android-bootstrap.h

@@ -38,6 +38,13 @@ JavaVM *lo_get_javavm(void);
 
 const char *lo_get_app_data_dir(void);
 
+#define UNPACK_TREE "/assets/unpack"
+#define UNPACK_TREE_GZ "/assets/gz.unpack"
+
+int setup_cdir(void);
+int setup_assets_tree(void);
+void extract_files(const char *root, const char *prefix, int gzipped);
+
 #ifdef __cplusplus
 }
 #endif

sal/Library_lo-bootstrap.mk

@@ -19,6 +19,7 @@ $(eval $(call gb_Library_add_libs,lo-bootstrap,\
 ))
 
 $(eval $(call gb_Library_add_cobjects,lo-bootstrap,\
+	sal/android/libreofficekit-jni \
 	sal/android/lo-bootstrap \
 ))
 

sal/android/libreofficekit-jni.c

+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <time.h>
+
+#include <jni.h>
+
+#include <android/log.h>
+
+#include <osl/detail/android-bootstrap.h>
+
+//#define LOGI(...) ((void)__android_log_print(ANDROID_LOG_INFO, "LibreOfficeKit", __VA_ARGS__))
+#define LOGE(...) ((void)__android_log_print(ANDROID_LOG_ERROR, "LibreOfficeKit", __VA_ARGS__))
+
+/* These are valid / used in all apps. */
+extern const char *data_dir;
+extern const char *cache_dir;
+extern void *apk_file;
+extern int apk_file_size;
+
+extern void Java_org_libreoffice_android_Bootstrap_putenv(JNIEnv* env, jobject clazz, jstring string);
+extern jboolean Java_org_libreoffice_android_Bootstrap_redirect_1stdio(JNIEnv* env, jobject clazz, jboolean state);
+extern void Java_org_libreoffice_android_Bootstrap_extract_1files(JNIEnv* env, jobject clazz);
+
+/// Call the same method from Bootstrap.
+__attribute__ ((visibility("default")))
+void
+Java_org_libreoffice_android_LibreOfficeKit_putenv(JNIEnv* env,
+                                              jobject clazz,
+                                              jstring string)
+{
+    Java_org_libreoffice_android_Bootstrap_putenv(env, clazz, string);
+}
+
+/// Call the same method from Bootstrap.
+__attribute__ ((visibility("default")))
+jboolean
+Java_org_libreoffice_android_LibreOfficeKit_redirect_1stdio(JNIEnv* env,
+                                                            jobject clazz,
+                                                            jboolean state)
+{
+    return Java_org_libreoffice_android_Bootstrap_redirect_1stdio(env, clazz, state);
+}
+
+/// Call the same method from Bootstrap.
+__attribute__ ((visibility("default")))
+void
+Java_org_libreoffice_android_LibreOfficeKit_extract_1files(JNIEnv* env,
+                                                           jobject clazz)
+{
+    Java_org_libreoffice_android_Bootstrap_extract_1files(env, clazz);
+}
+
+/// Initialize the LibreOfficeKit.
+__attribute__ ((visibility("default")))
+jboolean
+Java_org_libreoffice_android_LibreOfficeKit_init__Ljava_lang_String_2Ljava_lang_String_2Ljava_lang_String_2
+    (JNIEnv* env,
+     jobject clazz,
+     jstring dataDir,
+     jstring cacheDir,
+     jstring apkFile)
+{
+    struct stat st;
+    int fd;
+    const char *dataDirPath;
+    const char *cacheDirPath;
+    const char *apkFilePath;
+
+    (void) clazz;
+
+    dataDirPath = (*env)->GetStringUTFChars(env, dataDir, NULL);
+    data_dir = strdup(dataDirPath);
+    (*env)->ReleaseStringUTFChars(env, dataDir, dataDirPath);
+
+    cacheDirPath = (*env)->GetStringUTFChars(env, cacheDir, NULL);
+    cache_dir = strdup(cacheDirPath);
+    (*env)->ReleaseStringUTFChars(env, cacheDir, cacheDirPath);
+
+    apkFilePath =  (*env)->GetStringUTFChars(env, apkFile, NULL);
+
+    fd = open(apkFilePath, O_RDONLY);
+    if (fd == -1) {
+        LOGE("Could not open %s", apkFilePath);
+        (*env)->ReleaseStringUTFChars(env, apkFile, apkFilePath);
+        return JNI_FALSE;
+    }
+    if (fstat(fd, &st) == -1) {
+        LOGE("Could not fstat %s", apkFilePath);
+        close(fd);
+        (*env)->ReleaseStringUTFChars(env, apkFile, apkFilePath);
+        return JNI_FALSE;
+    }
+    apk_file = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+    close(fd);
+
+    if (apk_file == MAP_FAILED) {
+        LOGE("Could not mmap %s", apkFilePath);
+        (*env)->ReleaseStringUTFChars(env, apkFile, apkFilePath);
+        return JNI_FALSE;
+    }
+    apk_file_size = st.st_size;
+
+    (*env)->ReleaseStringUTFChars(env, apkFile, apkFilePath);
+
+    if (!setup_cdir())
+        return JNI_FALSE;
+
+    if (!setup_assets_tree())
+        return JNI_FALSE;
+
+    return JNI_TRUE;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

sal/android/lo-bootstrap.c

@@ -28,7 +28,7 @@
 
 #include "uthash.h"
 
-#include "osl/detail/android-bootstrap.h"
+#include <osl/detail/android-bootstrap.h>
 
 #undef LOGI
 
@@ -142,7 +142,7 @@ cdir_entry_size(struct cdir_entry *entry)
         letoh16(entry->file_comment_size);
 }
 
-static int
+int
 setup_cdir(void)
 {
     struct cdir_end *dirend = (struct cdir_end *)((char *) apk_file + apk_file_size - sizeof(*dirend));
@@ -221,7 +221,7 @@ handle_one_asset(struct cdir_entry *entry)
     }
 }
 
-static int
+int
 setup_assets_tree(void)
 {
     int count = cdir_entries;
@@ -629,9 +629,6 @@ lo_apk_lstat(const char *path,
     return -1;
 }
 
-#define UNPACK_TREE "/assets/unpack"
-#define UNPACK_TREE_GZ "/assets/gz.unpack"
-
 static int
 mkdir_p(const char *dirname)
 {
@@ -718,7 +715,7 @@ extract_gzipped(const char *filename,
     return total;
 }
 
-static void
+void
 extract_files(const char *root,
               const char *prefix,
               int gzipped)