Java tutorial
/* * Copyright (C) 2014 Dominik Schrmann <dominik@dominikschuermann.de> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.sufficientlysecure.keychain.ui.adapter; import android.content.Context; import android.content.res.ColorStateList; import android.database.Cursor; import android.graphics.PorterDuff; import android.graphics.Typeface; import android.support.annotation.Nullable; import android.support.v4.widget.CursorAdapter; import android.text.Spannable; import android.text.SpannableString; import android.text.SpannableStringBuilder; import android.text.format.DateFormat; import android.text.style.StyleSpan; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.pgp.CanonicalizedSecretKey.SecretKeyType; import org.sufficientlysecure.keychain.provider.KeychainContract.Keys; import org.sufficientlysecure.keychain.service.SaveKeyringParcel; import org.sufficientlysecure.keychain.service.SaveKeyringParcel.SubkeyChange; import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils; import java.util.Calendar; import java.util.Date; import java.util.TimeZone; public class SubkeysAdapter extends CursorAdapter { private LayoutInflater mInflater; private SaveKeyringParcel mSaveKeyringParcel; private boolean mHasAnySecret; private ColorStateList mDefaultTextColor; public static final String[] SUBKEYS_PROJECTION = new String[] { Keys._ID, Keys.KEY_ID, Keys.RANK, Keys.ALGORITHM, Keys.KEY_SIZE, Keys.KEY_CURVE_OID, Keys.HAS_SECRET, Keys.CAN_CERTIFY, Keys.CAN_ENCRYPT, Keys.CAN_SIGN, Keys.CAN_AUTHENTICATE, Keys.IS_REVOKED, Keys.CREATION, Keys.EXPIRY, Keys.FINGERPRINT }; private static final int INDEX_ID = 0; private static final int INDEX_KEY_ID = 1; private static final int INDEX_RANK = 2; private static final int INDEX_ALGORITHM = 3; private static final int INDEX_KEY_SIZE = 4; private static final int INDEX_KEY_CURVE_OID = 5; private static final int INDEX_HAS_SECRET = 6; private static final int INDEX_CAN_CERTIFY = 7; private static final int INDEX_CAN_ENCRYPT = 8; private static final int INDEX_CAN_SIGN = 9; private static final int INDEX_CAN_AUTHENTICATE = 10; private static final int INDEX_IS_REVOKED = 11; private static final int INDEX_CREATION = 12; private static final int INDEX_EXPIRY = 13; private static final int INDEX_FINGERPRINT = 14; public SubkeysAdapter(Context context, Cursor c, int flags) { super(context, c, flags); mInflater = LayoutInflater.from(context); } public long getKeyId(int position) { mCursor.moveToPosition(position); return mCursor.getLong(INDEX_KEY_ID); } public long getCreationDate(int position) { mCursor.moveToPosition(position); return mCursor.getLong(INDEX_CREATION); } public Long getExpiryDate(int position) { mCursor.moveToPosition(position); if (mCursor.isNull(INDEX_EXPIRY)) { return null; } else { return mCursor.getLong(INDEX_EXPIRY); } } public int getAlgorithm(int position) { mCursor.moveToPosition(position); return mCursor.getInt(INDEX_ALGORITHM); } public int getKeySize(int position) { mCursor.moveToPosition(position); return mCursor.getInt(INDEX_KEY_SIZE); } public String getCurveOid(int position) { mCursor.moveToPosition(position); return mCursor.getString(INDEX_KEY_CURVE_OID); } public SecretKeyType getSecretKeyType(int position) { mCursor.moveToPosition(position); return SecretKeyType.fromNum(mCursor.getInt(INDEX_HAS_SECRET)); } @Override public Cursor swapCursor(Cursor newCursor) { mHasAnySecret = false; if (newCursor != null && newCursor.moveToFirst()) { do { SecretKeyType hasSecret = SecretKeyType.fromNum(newCursor.getInt(INDEX_HAS_SECRET)); if (hasSecret.isUsable()) { mHasAnySecret = true; break; } } while (newCursor.moveToNext()); } return super.swapCursor(newCursor); } @Override public void bindView(View view, Context context, Cursor cursor) { TextView vKeyId = (TextView) view.findViewById(R.id.subkey_item_key_id); TextView vKeyDetails = (TextView) view.findViewById(R.id.subkey_item_details); TextView vKeyExpiry = (TextView) view.findViewById(R.id.subkey_item_expiry); ImageView vCertifyIcon = (ImageView) view.findViewById(R.id.subkey_item_ic_certify); ImageView vSignIcon = (ImageView) view.findViewById(R.id.subkey_item_ic_sign); ImageView vEncryptIcon = (ImageView) view.findViewById(R.id.subkey_item_ic_encrypt); ImageView vAuthenticateIcon = (ImageView) view.findViewById(R.id.subkey_item_ic_authenticate); ImageView vEditImage = (ImageView) view.findViewById(R.id.subkey_item_edit_image); ImageView vStatus = (ImageView) view.findViewById(R.id.subkey_item_status); // not used: ImageView deleteImage = (ImageView) view.findViewById(R.id.subkey_item_delete_button); deleteImage.setVisibility(View.GONE); long keyId = cursor.getLong(INDEX_KEY_ID); vKeyId.setText(KeyFormattingUtils.beautifyKeyId(keyId)); // may be set with additional "stripped" later on SpannableStringBuilder algorithmStr = new SpannableStringBuilder(); algorithmStr.append(KeyFormattingUtils.getAlgorithmInfo(context, cursor.getInt(INDEX_ALGORITHM), cursor.getInt(INDEX_KEY_SIZE), cursor.getString(INDEX_KEY_CURVE_OID))); SubkeyChange change = mSaveKeyringParcel != null ? mSaveKeyringParcel.getSubkeyChange(keyId) : null; if (change != null && (change.mDummyStrip || change.mMoveKeyToSecurityToken)) { if (change.mDummyStrip) { algorithmStr.append(", "); final SpannableString boldStripped = new SpannableString(context.getString(R.string.key_stripped)); boldStripped.setSpan(new StyleSpan(Typeface.BOLD), 0, boldStripped.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); algorithmStr.append(boldStripped); } if (change.mMoveKeyToSecurityToken) { algorithmStr.append(", "); final SpannableString boldDivert = new SpannableString(context.getString(R.string.key_divert)); boldDivert.setSpan(new StyleSpan(Typeface.BOLD), 0, boldDivert.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); algorithmStr.append(boldDivert); } } else { switch (SecretKeyType.fromNum(cursor.getInt(INDEX_HAS_SECRET))) { case GNU_DUMMY: algorithmStr.append(", "); algorithmStr.append(context.getString(R.string.key_stripped)); break; case DIVERT_TO_CARD: algorithmStr.append(", "); algorithmStr.append(context.getString(R.string.key_divert)); break; case PASSPHRASE_EMPTY: algorithmStr.append(", "); algorithmStr.append(context.getString(R.string.key_no_passphrase)); break; case UNAVAILABLE: // don't show this on pub keys //algorithmStr += ", " + context.getString(R.string.key_unavailable); break; } } vKeyDetails.setText(algorithmStr, TextView.BufferType.SPANNABLE); boolean isMasterKey = cursor.getInt(INDEX_RANK) == 0; if (isMasterKey) { vKeyId.setTypeface(null, Typeface.BOLD); } else { vKeyId.setTypeface(null, Typeface.NORMAL); } // Set icons according to properties vCertifyIcon.setVisibility(cursor.getInt(INDEX_CAN_CERTIFY) != 0 ? View.VISIBLE : View.GONE); vEncryptIcon.setVisibility(cursor.getInt(INDEX_CAN_ENCRYPT) != 0 ? View.VISIBLE : View.GONE); vSignIcon.setVisibility(cursor.getInt(INDEX_CAN_SIGN) != 0 ? View.VISIBLE : View.GONE); vAuthenticateIcon.setVisibility(cursor.getInt(INDEX_CAN_AUTHENTICATE) != 0 ? View.VISIBLE : View.GONE); boolean isRevoked = cursor.getInt(INDEX_IS_REVOKED) > 0; Date expiryDate = null; if (!cursor.isNull(INDEX_EXPIRY)) { expiryDate = new Date(cursor.getLong(INDEX_EXPIRY) * 1000); } // for edit key if (mSaveKeyringParcel != null) { boolean revokeThisSubkey = (mSaveKeyringParcel.mRevokeSubKeys.contains(keyId)); if (revokeThisSubkey) { if (!isRevoked) { isRevoked = true; } } SaveKeyringParcel.SubkeyChange subkeyChange = mSaveKeyringParcel.getSubkeyChange(keyId); if (subkeyChange != null) { if (subkeyChange.mExpiry == null || subkeyChange.mExpiry == 0L) { expiryDate = null; } else { expiryDate = new Date(subkeyChange.mExpiry * 1000); } } vEditImage.setVisibility(View.VISIBLE); } else { vEditImage.setVisibility(View.GONE); } boolean isExpired; if (expiryDate != null) { isExpired = expiryDate.before(new Date()); Calendar expiryCal = Calendar.getInstance(TimeZone.getTimeZone("UTC")); expiryCal.setTime(expiryDate); // convert from UTC to time zone of device expiryCal.setTimeZone(TimeZone.getDefault()); vKeyExpiry.setText(context.getString(R.string.label_expiry) + ": " + DateFormat.getDateFormat(context).format(expiryCal.getTime())); } else { isExpired = false; vKeyExpiry.setText(context.getString(R.string.label_expiry) + ": " + context.getString(R.string.none)); } // if key is expired or revoked... boolean isInvalid = isRevoked || isExpired; if (isInvalid) { vStatus.setVisibility(View.VISIBLE); vCertifyIcon.setColorFilter(mContext.getResources().getColor(R.color.key_flag_gray), PorterDuff.Mode.SRC_IN); vSignIcon.setColorFilter(mContext.getResources().getColor(R.color.key_flag_gray), PorterDuff.Mode.SRC_IN); vEncryptIcon.setColorFilter(mContext.getResources().getColor(R.color.key_flag_gray), PorterDuff.Mode.SRC_IN); vAuthenticateIcon.setColorFilter(mContext.getResources().getColor(R.color.key_flag_gray), PorterDuff.Mode.SRC_IN); if (isRevoked) { vStatus.setImageResource(R.drawable.status_signature_revoked_cutout_24dp); vStatus.setColorFilter(mContext.getResources().getColor(R.color.key_flag_gray), PorterDuff.Mode.SRC_IN); } else if (isExpired) { vStatus.setImageResource(R.drawable.status_signature_expired_cutout_24dp); vStatus.setColorFilter(mContext.getResources().getColor(R.color.key_flag_gray), PorterDuff.Mode.SRC_IN); } } else { vStatus.setVisibility(View.GONE); vKeyId.setTextColor(mDefaultTextColor); vKeyDetails.setTextColor(mDefaultTextColor); vKeyExpiry.setTextColor(mDefaultTextColor); vCertifyIcon.clearColorFilter(); vSignIcon.clearColorFilter(); vEncryptIcon.clearColorFilter(); vAuthenticateIcon.clearColorFilter(); } vKeyId.setEnabled(!isInvalid); vKeyDetails.setEnabled(!isInvalid); vKeyExpiry.setEnabled(!isInvalid); } @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { View view = mInflater.inflate(R.layout.view_key_adv_subkey_item, null); if (mDefaultTextColor == null) { TextView keyId = (TextView) view.findViewById(R.id.subkey_item_key_id); mDefaultTextColor = keyId.getTextColors(); } return view; } // Disable selection of items, http://stackoverflow.com/a/4075045 @Override public boolean areAllItemsEnabled() { if (mSaveKeyringParcel == null) { return false; } else { return super.areAllItemsEnabled(); } } // Disable selection of items, http://stackoverflow.com/a/4075045 @Override public boolean isEnabled(int position) { if (mSaveKeyringParcel == null) { return false; } else { return super.isEnabled(position); } } /** Set this adapter into edit mode. This mode displays additional info for * each item from a supplied SaveKeyringParcel reference. * * Note that it is up to the caller to reload the underlying cursor after * updating the SaveKeyringParcel! * * @see SaveKeyringParcel * * @param saveKeyringParcel The parcel to get info from, or null to leave edit mode. */ public void setEditMode(@Nullable SaveKeyringParcel saveKeyringParcel) { mSaveKeyringParcel = saveKeyringParcel; } }