michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.util;
michael@0: 
michael@0: import android.content.ClipData;
michael@0: import android.content.Context;
michael@0: import android.os.Build;
michael@0: import android.util.Log;
michael@0: 
michael@0: import org.mozilla.gecko.mozglue.generatorannotations.WrapElementForJNI;
michael@0: 
michael@0: import java.util.concurrent.SynchronousQueue;
michael@0: 
michael@0: public final class Clipboard {
michael@0:     private static Context mContext;
michael@0:     private final static String LOGTAG = "GeckoClipboard";
michael@0:     private final static SynchronousQueue<String> sClipboardQueue = new SynchronousQueue<String>();
michael@0: 
michael@0:     private Clipboard() {
michael@0:     }
michael@0: 
michael@0:     public static void init(final Context c) {
michael@0:         if (mContext != null) {
michael@0:             Log.w(LOGTAG, "Clipboard.init() called twice!");
michael@0:             return;
michael@0:         }
michael@0:         mContext = c.getApplicationContext();
michael@0:     }
michael@0: 
michael@0:     @WrapElementForJNI(stubName = "GetClipboardTextWrapper")
michael@0:     public static String getText() {
michael@0:         // If we're on the UI thread or the background thread, we have a looper on the thread
michael@0:         // and can just call this directly. For any other threads, post the call to the
michael@0:         // background thread.
michael@0: 
michael@0:         if (ThreadUtils.isOnUiThread() || ThreadUtils.isOnBackgroundThread()) {
michael@0:             return getClipboardTextImpl();
michael@0:         }
michael@0: 
michael@0:         ThreadUtils.postToBackgroundThread(new Runnable() {
michael@0:             @Override
michael@0:             public void run() {
michael@0:                 String text = getClipboardTextImpl();
michael@0:                 try {
michael@0:                     sClipboardQueue.put(text != null ? text : "");
michael@0:                 } catch (InterruptedException ie) {}
michael@0:             }
michael@0:         });
michael@0:         try {
michael@0:             return sClipboardQueue.take();
michael@0:         } catch (InterruptedException ie) {
michael@0:             return "";
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     @WrapElementForJNI(stubName = "SetClipboardText")
michael@0:     public static void setText(final CharSequence text) {
michael@0:         ThreadUtils.postToBackgroundThread(new Runnable() {
michael@0:             @Override
michael@0:             @SuppressWarnings("deprecation")
michael@0:             public void run() {
michael@0:                 if (Build.VERSION.SDK_INT >= 11) {
michael@0:                     android.content.ClipboardManager cm = getClipboardManager(mContext);
michael@0:                     ClipData clip = ClipData.newPlainText("Text", text);
michael@0:                     try {
michael@0:                         cm.setPrimaryClip(clip);
michael@0:                     } catch (NullPointerException e) {
michael@0:                         // Bug 776223: This is a Samsung clipboard bug. setPrimaryClip() can throw
michael@0:                         // a NullPointerException if Samsung's /data/clipboard directory is full.
michael@0:                         // Fortunately, the text is still successfully copied to the clipboard.
michael@0:                     }
michael@0:                 } else {
michael@0:                     android.text.ClipboardManager cm = getDeprecatedClipboardManager(mContext);
michael@0:                     cm.setText(text);
michael@0:                 }
michael@0:             }
michael@0:         });
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Returns true if the clipboard is nonempty, false otherwise.
michael@0:      *
michael@0:      * @return true if the clipboard is nonempty, false otherwise.
michael@0:      */
michael@0:     @WrapElementForJNI
michael@0:     public static boolean hasText() {
michael@0:         if (Build.VERSION.SDK_INT >= 11) {
michael@0:             android.content.ClipboardManager cm = getClipboardManager(mContext);
michael@0:             return cm.hasPrimaryClip();
michael@0:         }
michael@0: 
michael@0:         android.text.ClipboardManager cm = getDeprecatedClipboardManager(mContext);
michael@0:         return cm.hasText();
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Deletes all text from the clipboard.
michael@0:      */
michael@0:     @WrapElementForJNI
michael@0:     public static void clearText() {
michael@0:         setText(null);
michael@0:     }
michael@0: 
michael@0:     private static android.content.ClipboardManager getClipboardManager(Context context) {
michael@0:         // In API Level 11 and above, CLIPBOARD_SERVICE returns android.content.ClipboardManager,
michael@0:         // which is a subclass of android.text.ClipboardManager.
michael@0:         return (android.content.ClipboardManager) mContext.getSystemService(Context.CLIPBOARD_SERVICE);
michael@0:     }
michael@0: 
michael@0:     private static android.text.ClipboardManager getDeprecatedClipboardManager(Context context) {
michael@0:         return (android.text.ClipboardManager) mContext.getSystemService(Context.CLIPBOARD_SERVICE);
michael@0:     }
michael@0: 
michael@0:     /* On some devices, access to the clipboard service needs to happen
michael@0:      * on a thread with a looper, so this function requires a looper is
michael@0:      * present on the thread. */
michael@0:     @SuppressWarnings("deprecation")
michael@0:     private static String getClipboardTextImpl() {
michael@0:         if (Build.VERSION.SDK_INT >= 11) {
michael@0:             android.content.ClipboardManager cm = getClipboardManager(mContext);
michael@0:             if (cm.hasPrimaryClip()) {
michael@0:                 ClipData clip = cm.getPrimaryClip();
michael@0:                 if (clip != null) {
michael@0:                     ClipData.Item item = clip.getItemAt(0);
michael@0:                     return item.coerceToText(mContext).toString();
michael@0:                 }
michael@0:             }
michael@0:         } else {
michael@0:             android.text.ClipboardManager cm = getDeprecatedClipboardManager(mContext);
michael@0:             if (cm.hasText()) {
michael@0:                 return cm.getText().toString();
michael@0:             }
michael@0:         }
michael@0:         return null;
michael@0:     }
michael@0: }