// Copyright (c) 2013 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. package org.chromium.ui; import org.chromium.base.CalledByNative; import org.chromium.base.JNINamespace; import android.content.ClipData; import android.content.ClipboardManager; import android.content.Context; import android.text.TextUtils; /** * Simple proxy that provides C++ code with an access pathway to the Android * clipboard. */ @JNINamespace("ui") public class Clipboard { // Necessary for coercing clipboard contents to text if they require // access to network resources, etceteras (e.g., URI in clipboard) private final Context mContext; private final ClipboardManager mClipboardManager; /** * Use the factory constructor instead. * * @param context for accessing the clipboard */ private Clipboard(final Context context) { mContext = context; mClipboardManager = (ClipboardManager) context.getSystemService(Context.CLIPBOARD_SERVICE); } /** * Returns a new Clipboard object bound to the specified context. * * @param context for accessing the clipboard * @return the new object */ @CalledByNative private static Clipboard create(final Context context) { return new Clipboard(context); } /** * Emulates the behavior of the now-deprecated * {@link android.text.ClipboardManager#getText()} by invoking * {@link android.content.ClipData.Item#coerceToText(Context)} on the first * item in the clipboard (if any) and returning the result as a string. *
* This is quite different than simply calling {@link Object#toString()} on
* the clip; consumers of this API should familiarize themselves with the
* process described in
* {@link android.content.ClipData.Item#coerceToText(Context)} before using
* this method.
*
* @return a string representation of the first item on the clipboard, if
* the clipboard currently has an item and coercion of the item into
* a string is possible; otherwise, null
*/
@SuppressWarnings("javadoc")
@CalledByNative
private String getCoercedText() {
final ClipData clip = mClipboardManager.getPrimaryClip();
if (clip != null && clip.getItemCount() > 0) {
final CharSequence sequence = clip.getItemAt(0).coerceToText(mContext);
if (sequence != null) {
return sequence.toString();
}
}
return null;
}
/**
* Emulates the behavior of the now-deprecated
* {@link android.text.ClipboardManager#setText(CharSequence)}, setting the
* clipboard's current primary clip to a plain-text clip that consists of
* the specified string.
*
* @param text will become the content of the clipboard's primary clip
*/
@SuppressWarnings("javadoc")
@CalledByNative
private void setText(final String text) {
mClipboardManager.setPrimaryClip(ClipData.newPlainText(null, text));
}
/**
* Approximates the behavior of the now-deprecated
* {@link android.text.ClipboardManager#hasText()}, returning true if and
* only if the clipboard has a primary clip and that clip contains a plain
* non-empty text entry (without attempting coercion - URLs and intents
* will cause this method to return false).
*
* @return as described above
*/
@SuppressWarnings("javadoc")
@CalledByNative
private boolean hasPlainText() {
final ClipData clip = mClipboardManager.getPrimaryClip();
if (clip != null && clip.getItemCount() > 0) {
final CharSequence text = clip.getItemAt(0).getText();
return !TextUtils.isEmpty(text);
}
return false;
}
}