diff options
Diffstat (limited to 'java/org/gnu/emacs/EmacsService.java')
| -rw-r--r-- | java/org/gnu/emacs/EmacsService.java | 254 |
1 files changed, 180 insertions, 74 deletions
diff --git a/java/org/gnu/emacs/EmacsService.java b/java/org/gnu/emacs/EmacsService.java index 5cb1ceca0aa..446cd26a3dd 100644 --- a/java/org/gnu/emacs/EmacsService.java +++ b/java/org/gnu/emacs/EmacsService.java @@ -19,6 +19,7 @@ along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */ package org.gnu.emacs; +import java.io.ByteArrayOutputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.UnsupportedEncodingException; @@ -45,9 +46,11 @@ import android.view.KeyEvent; import android.view.inputmethod.CursorAnchorInfo; import android.view.inputmethod.ExtractedText; +import android.app.AlarmManager; import android.app.Notification; -import android.app.NotificationManager; import android.app.NotificationChannel; +import android.app.NotificationManager; +import android.app.PendingIntent; import android.app.Service; import android.content.ClipboardManager; @@ -60,6 +63,7 @@ import android.content.UriPermission; import android.content.pm.PackageManager; import android.content.res.AssetManager; +import android.content.res.Configuration; import android.hardware.input.InputManager; @@ -78,6 +82,7 @@ import android.os.VibrationEffect; import android.provider.DocumentsContract; import android.provider.DocumentsContract.Document; +import android.provider.OpenableColumns; import android.provider.Settings; import android.util.Log; @@ -109,9 +114,10 @@ public final class EmacsService extends Service private ContentResolver resolver; /* Keep this in synch with androidgui.h. */ - public static final int IC_MODE_NULL = 0; - public static final int IC_MODE_ACTION = 1; - public static final int IC_MODE_TEXT = 2; + public static final int IC_MODE_NULL = 0; + public static final int IC_MODE_ACTION = 1; + public static final int IC_MODE_TEXT = 2; + public static final int IC_MODE_PASSWORD = 3; /* Display metrics used by font backends. */ public DisplayMetrics metrics; @@ -135,6 +141,10 @@ public final class EmacsService extends Service been created yet. */ private EmacsSafThread storageThread; + /* The Thread object representing the Android user interface + thread. */ + private Thread mainThread; + static { servicingQuery = new AtomicInteger (); @@ -235,6 +245,7 @@ public final class EmacsService extends Service / metrics.density) * pixelDensityX); resolver = getContentResolver (); + mainThread = Thread.currentThread (); /* If the density used to compute the text size is lesser than 160, there's likely a bug with display density computation. @@ -383,7 +394,13 @@ public final class EmacsService extends Service { if (DEBUG_THREADS) { - if (Thread.currentThread () instanceof EmacsThread) + /* When SERVICE is NULL, Emacs is being executed non-interactively. */ + if (SERVICE == null + /* It was previously assumed that only instances of + `EmacsThread' were valid for graphics calls, but this is + no longer true now that Lisp threads can be attached to + the JVM. */ + || (Thread.currentThread () != SERVICE.mainThread)) return; throw new RuntimeException ("Emacs thread function" @@ -437,21 +454,6 @@ public final class EmacsService extends Service EmacsDrawPoint.perform (drawable, gc, x, y); } - public void - clearWindow (EmacsWindow window) - { - checkEmacsThread (); - window.clearWindow (); - } - - public void - clearArea (EmacsWindow window, int x, int y, int width, - int height) - { - checkEmacsThread (); - window.clearArea (x, y, width, height); - } - @SuppressWarnings ("deprecation") public void ringBell (int duration) @@ -581,6 +583,15 @@ public final class EmacsService extends Service return false; } + public boolean + detectKeyboard () + { + Configuration configuration; + + configuration = getResources ().getConfiguration (); + return configuration.keyboard != Configuration.KEYBOARD_NOKEYS; + } + public String nameKeysym (int keysym) { @@ -716,11 +727,29 @@ public final class EmacsService extends Service restartEmacs () { Intent intent; + PendingIntent pending; + AlarmManager manager; intent = new Intent (this, EmacsActivity.class); intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK); - startActivity (intent); + + if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) + startActivity (intent); + else + { + /* Experimentation has established that Android 4.3 and earlier + versions do not attempt to recreate a process when it crashes + immediately after requesting that an intent for itself be + started. Schedule an intent to start some time after Emacs + exits instead. */ + + pending = PendingIntent.getActivity (this, 0, intent, 0); + manager = (AlarmManager) getSystemService (Context.ALARM_SERVICE); + manager.set (AlarmManager.RTC, System.currentTimeMillis () + 100, + pending); + } + System.exit (0); } @@ -905,48 +934,6 @@ public final class EmacsService extends Service /* Content provider functions. */ - /* Return a ContentResolver capable of accessing as many files as - possible, namely the content resolver of the last selected - activity if available: only they posses the rights to access drag - and drop files. */ - - public ContentResolver - getUsefulContentResolver () - { - EmacsActivity activity; - - if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) - /* Since the system predates drag and drop, return this resolver - to avoid any unforeseen difficulties. */ - return resolver; - - activity = EmacsActivity.lastFocusedActivity; - if (activity == null) - return resolver; - - return activity.getContentResolver (); - } - - /* Return a context whose ContentResolver is granted access to most - files, as in `getUsefulContentResolver'. */ - - public Context - getContentResolverContext () - { - EmacsActivity activity; - - if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) - /* Since the system predates drag and drop, return this resolver - to avoid any unforeseen difficulties. */ - return this; - - activity = EmacsActivity.lastFocusedActivity; - if (activity == null) - return this; - - return activity; - } - /* Open a content URI described by the bytes BYTES, a non-terminated string; make it writable if WRITABLE, and readable if READABLE. Truncate the file if TRUNCATE. @@ -960,9 +947,6 @@ public final class EmacsService extends Service String name, mode; ParcelFileDescriptor fd; int i; - ContentResolver resolver; - - resolver = getUsefulContentResolver (); /* Figure out the file access mode. */ @@ -1024,12 +1008,8 @@ public final class EmacsService extends Service ParcelFileDescriptor fd; Uri uri; int rc, flags; - Context context; - ContentResolver resolver; ParcelFileDescriptor descriptor; - context = getContentResolverContext (); - uri = Uri.parse (name); flags = 0; @@ -1039,7 +1019,7 @@ public final class EmacsService extends Service if (writable) flags |= Intent.FLAG_GRANT_WRITE_URI_PERMISSION; - rc = context.checkCallingUriPermission (uri, flags); + rc = checkCallingUriPermission (uri, flags); if (rc == PackageManager.PERMISSION_GRANTED) return true; @@ -1053,7 +1033,6 @@ public final class EmacsService extends Service try { - resolver = context.getContentResolver (); descriptor = resolver.openFileDescriptor (uri, "r"); return true; } @@ -1077,22 +1056,114 @@ public final class EmacsService extends Service return false; } + /* Return a 8 character checksum for the string STRING, after encoding + as UTF-8 data. */ + + public static String + getDisplayNameHash (String string) + { + byte[] encoded; + ByteArrayOutputStream stream; + int i, ch; + + /* Much of the VFS code expects file names to be encoded as modified + UTF-8 data, but Android's JNI implementation produces (while not + accepting!) regular UTF-8 sequences for all characters, even + non-Emoji ones. With no documentation to this effect, save for + two comments nestled in the source code of the Java virtual + machine, it is not sound to assume that this behavior will not be + revised in future or modified releases of Android, and as such, + encode STRING into modified UTF-8 by hand, to protect against + future changes in this respect. */ + + stream = new ByteArrayOutputStream (); + + for (i = 0; i < string.length (); ++i) + { + ch = string.charAt (i); + + if (ch != 0 && ch <= 127) + stream.write (ch); + else if (ch <= 2047) + { + stream.write (0xc0 | (0x1f & (ch >> 6))); + stream.write (0x80 | (0x3f & ch)); + } + else + { + stream.write (0xe0 | (0x0f & (ch >> 12))); + stream.write (0x80 | (0x3f & (ch >> 6))); + stream.write (0x80 | (0x3f & ch)); + } + } + + encoded = stream.toByteArray (); + + /* Closing a ByteArrayOutputStream has no effect. + encoded.close (); */ + + return EmacsNative.displayNameHash (encoded); + } + /* Build a content file name for URI. Return a file name within the /contents/by-authority pseudo-directory that `android_get_content_name' can then transform back into an encoded URI. + If a display name can be requested from URI (using the resolver + RESOLVER), append it to this file name. + A content name consists of any number of unencoded path segments separated by `/' characters, possibly followed by a question mark and an encoded query string. */ public static String - buildContentName (Uri uri) + buildContentName (Uri uri, ContentResolver resolver) { StringBuilder builder; + String displayName; + Cursor cursor; + int column; + + displayName = null; + cursor = null; + + try + { + cursor = resolver.query (uri, null, null, null, null); + + if (cursor != null) + { + cursor.moveToFirst (); + column + = cursor.getColumnIndexOrThrow (OpenableColumns.DISPLAY_NAME); + displayName + = cursor.getString (column); + + /* Verify that the display name is valid, i.e. it + contains no characters unsuitable for a file name and + is nonempty. */ + if (displayName.isEmpty () || displayName.contains ("/")) + displayName = null; + } + } + catch (Exception e) + { + /* Ignored. */ + } + finally + { + if (cursor != null) + cursor.close (); + } + + /* If a display name is available, at this point it should be the + value of displayName. */ - builder = new StringBuilder ("/content/by-authority/"); + builder = new StringBuilder (displayName != null + ? "/content/by-authority-named/" + : "/content/by-authority/"); builder.append (uri.getAuthority ()); /* First, append each path segment. */ @@ -1109,6 +1180,16 @@ public final class EmacsService extends Service if (uri.getEncodedQuery () != null) builder.append ('?').append (uri.getEncodedQuery ()); + /* Append the display name. */ + + if (displayName != null) + { + builder.append ('/'); + builder.append (getDisplayNameHash (displayName)); + builder.append ('/'); + builder.append (displayName); + } + return builder.toString (); } @@ -2011,4 +2092,29 @@ public final class EmacsService extends Service else requestStorageAccess30 (); } + + + + /* Notification miscellany. */ + + /* Cancel any notification displayed with the tag TAG. */ + + public void + cancelNotification (final String string) + { + Object tem; + final NotificationManager manager; + + tem = getSystemService (Context.NOTIFICATION_SERVICE); + manager = (NotificationManager) tem; + + runOnUiThread (new Runnable () { + @Override + public void + run () + { + manager.cancel (string, 2); + } + }); + } }; |