Index: device/nfc/android/java/src/org/chromium/device/nfc/NfcImpl.java |
diff --git a/device/nfc/android/java/src/org/chromium/device/nfc/NfcImpl.java b/device/nfc/android/java/src/org/chromium/device/nfc/NfcImpl.java |
new file mode 100644 |
index 0000000000000000000000000000000000000000..5e1594ae61f005db572e1e7f145450bc679dacc4 |
--- /dev/null |
+++ b/device/nfc/android/java/src/org/chromium/device/nfc/NfcImpl.java |
@@ -0,0 +1,411 @@ |
+// Copyright 2015 The Chromium Authors. All rights reserved. |
timvolodine
2016/04/26 14:58:27
2015 -> 2016
shalamov
2016/04/26 21:56:52
Done.
|
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+package org.chromium.device.nfc; |
+ |
+import android.Manifest; |
+import android.annotation.TargetApi; |
+import android.app.Activity; |
+import android.content.Context; |
+import android.content.pm.PackageManager; |
+import android.nfc.FormatException; |
+import android.nfc.NdefMessage; |
+import android.nfc.NdefRecord; |
+import android.nfc.NfcAdapter; |
+import android.nfc.NfcAdapter.ReaderCallback; |
+import android.nfc.NfcManager; |
+import android.nfc.Tag; |
+import android.nfc.TagLostException; |
+import android.nfc.tech.Ndef; |
+import android.nfc.tech.NdefFormatable; |
+import android.nfc.tech.TagTechnology; |
+import android.os.Build; |
+import android.os.Process; |
+import android.support.annotation.Nullable; |
+ |
+import org.chromium.base.ApplicationStatus; |
+import org.chromium.base.Log; |
+import org.chromium.mojo.bindings.Callbacks; |
+import org.chromium.mojo.system.MojoException; |
+import org.chromium.mojom.device.Nfc; |
+import org.chromium.mojom.device.NfcClient; |
+import org.chromium.mojom.device.NfcError; |
+import org.chromium.mojom.device.NfcErrorType; |
+import org.chromium.mojom.device.NfcMessage; |
+import org.chromium.mojom.device.NfcPushOptions; |
+import org.chromium.mojom.device.NfcPushTarget; |
+import org.chromium.mojom.device.NfcRecord; |
+import org.chromium.mojom.device.NfcRecordType; |
+import org.chromium.mojom.device.NfcWatchOptions; |
+ |
+import java.io.IOException; |
+import java.io.UnsupportedEncodingException; |
+import java.util.ArrayList; |
+import java.util.List; |
+ |
+/** |
+ * Android implementation of the NFC mojo service defined in |
+ * device/nfc/nfc.mojom. |
+ */ |
+public class NfcImpl implements Nfc { |
+ private static final String TAG = "NfcImpl"; |
+ private static final String DOMAIN = "w3.org"; |
+ private static final String TYPE = "webnfc"; |
+ private static final String TEXT_MIME = "text/plain"; |
+ private static final String CHARSET_UTF8 = ";charset=UTF-8"; |
+ private static final String CHARSET_UTF16 = ";charset=UTF-16"; |
+ |
+ private NfcManager mNfcManager; |
timvolodine
2016/04/26 14:58:27
final?
shalamov
2016/04/26 21:56:53
Done.
|
+ private NfcAdapter mNfcAdapter; |
timvolodine
2016/04/26 14:58:27
final?
shalamov
2016/04/26 21:56:53
Done.
|
+ private final Context mContext; |
+ private Activity mActivity; |
+ private boolean mHasPermission; |
timvolodine
2016/04/26 14:58:26
final? same for mAcitivy above
shalamov
2016/04/26 21:56:53
Done.
|
+ private ReaderCallbackHandler mReaderCallbackHandler; |
+ private PendingPushOperation mPendingPushOperation; |
+ private NfcTagWriter mTagWriter; |
ncarter (slow)
2016/04/25 20:03:14
There are very few comments in this file overall.
timvolodine
2016/04/26 14:58:26
+1, bit more documentation would be great
shalamov
2016/04/26 21:56:53
Done.
shalamov
2016/04/26 21:56:53
Done.
|
+ |
+ public NfcImpl(Context context) { |
+ mContext = context; |
+ int permission = |
+ context.checkPermission(Manifest.permission.NFC, Process.myPid(), Process.myUid()); |
+ mHasPermission = permission == PackageManager.PERMISSION_GRANTED; |
+ if (mHasPermission) { |
+ mActivity = ApplicationStatus.getLastTrackedFocusedActivity(); |
+ mNfcManager = (NfcManager) mContext.getSystemService(Context.NFC_SERVICE); |
+ if (mNfcManager == null) { |
+ Log.w(TAG, "NFC is not supported."); |
+ } else { |
+ mNfcAdapter = mNfcManager.getDefaultAdapter(); |
+ } |
+ } else { |
+ Log.w(TAG, "NFC operations are not permitted."); |
+ } |
+ } |
+ |
+ // Public methods |
ncarter (slow)
2016/04/25 20:03:14
I don't think this is necessary.
shalamov
2016/04/26 21:56:52
Done.
|
+ @Override |
+ public void setClient(NfcClient client) {} |
+ |
+ @Override |
+ public void push(NfcMessage message, NfcPushOptions options, PushResponse callback) { |
+ if (!checkIfReady(callback)) return; |
+ |
+ if (options.target == NfcPushTarget.PEER) { |
+ callback.call(createError(NfcErrorType.NOT_SUPPORTED)); |
+ return; |
+ } |
+ |
+ if (mPendingPushOperation != null) { |
+ mPendingPushOperation.complete(createError(NfcErrorType.OPERATION_CANCELLED)); |
+ } |
+ |
+ mPendingPushOperation = new PendingPushOperation(message, options, callback); |
+ enableReaderMode(); |
+ processPendingPushOperation(); |
+ } |
+ |
+ @Override |
+ public void cancelPush(int target, CancelPushResponse callback) { |
+ if (!checkIfReady(callback)) return; |
+ |
+ if (target == NfcPushTarget.PEER) { |
+ callback.call(createError(NfcErrorType.NOT_SUPPORTED)); |
+ return; |
+ } |
+ |
+ if (mPendingPushOperation != null) { |
+ mPendingPushOperation.complete(createError(NfcErrorType.OPERATION_CANCELLED)); |
+ mPendingPushOperation = null; |
+ callback.call(null); |
+ } else { |
+ callback.call(createError(NfcErrorType.NOT_FOUND)); |
+ } |
+ } |
+ |
+ @Override |
+ public void watch(NfcWatchOptions options, WatchResponse callback) { |
+ if (!checkIfReady(callback)) return; |
timvolodine
2016/04/26 14:58:27
should this have a TODO? also below for cancelWatc
shalamov
2016/04/26 21:56:53
Done.
|
+ } |
+ |
+ @Override |
+ public void cancelWatch(int id, CancelWatchResponse callback) { |
+ if (!checkIfReady(callback)) return; |
+ } |
+ |
+ @Override |
+ public void cancelAllWatches(CancelAllWatchesResponse callback) { |
+ if (!checkIfReady(callback)) return; |
+ } |
+ |
+ @Override |
+ public void suspendNfcOperations() {} |
timvolodine
2016/04/26 14:58:27
is this intentionally empty or is this a also TODO
shalamov
2016/04/26 21:56:52
Done.
|
+ |
+ @Override |
+ public void resumeNfcOperations() {} |
+ |
+ @Override |
+ public void close() {} |
+ |
+ @Override |
+ public void onConnectionError(MojoException e) {} |
+ |
+ // Implementation |
ncarter (slow)
2016/04/25 20:03:14
Class comment for PendingPushOperation? Can be a o
shalamov
2016/04/26 21:56:52
Done.
|
+ private static class PendingPushOperation { |
+ private final NfcMessage mNfcMessage; |
+ private final NfcPushOptions mNfcPushOptions; |
+ private final PushResponse mPushResponseCallback; |
+ |
+ public PendingPushOperation( |
+ NfcMessage message, NfcPushOptions options, PushResponse callback) { |
+ mNfcMessage = message; |
+ mNfcPushOptions = options; |
+ mPushResponseCallback = callback; |
+ } |
+ |
+ public void complete(NfcError error) { |
+ if (mPushResponseCallback != null) mPushResponseCallback.call(error); |
+ } |
+ |
+ public NfcMessage message() { |
+ return mNfcMessage; |
+ } |
+ public NfcPushOptions pushOptions() { |
+ return mNfcPushOptions; |
+ } |
+ } |
+ |
+ private NfcError createError(int errorType) { |
+ NfcError error = new NfcError(); |
+ error.errorType = errorType; |
+ return error; |
+ } |
+ |
+ @Nullable |
+ private NfcError checkIfReady() { |
+ if (!mHasPermission) { |
+ return createError(NfcErrorType.SECURITY); |
+ } else if (mNfcManager == null || mNfcAdapter == null |
+ || Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) { |
+ return createError(NfcErrorType.NOT_SUPPORTED); |
+ } else if (!mNfcAdapter.isEnabled()) { |
+ return createError(NfcErrorType.DEVICE_DISABLED); |
+ } |
+ return null; |
+ } |
+ |
+ private boolean checkIfReady(Callbacks.Callback2<Integer, NfcError> callback) { |
+ NfcError error = checkIfReady(); |
+ if (error == null) return true; |
+ callback.call(0, error); |
+ return false; |
+ } |
+ |
+ private boolean checkIfReady(Callbacks.Callback1<NfcError> callback) { |
+ NfcError error = checkIfReady(); |
+ if (error == null) return true; |
+ callback.call(error); |
+ return false; |
+ } |
+ |
+ @TargetApi(Build.VERSION_CODES.KITKAT) |
+ private static class ReaderCallbackHandler implements ReaderCallback { |
+ private final NfcImpl mNfcImpl; |
+ |
+ public ReaderCallbackHandler(NfcImpl impl) { |
+ mNfcImpl = impl; |
+ } |
+ |
+ @Override |
+ public void onTagDiscovered(Tag tag) { |
+ mNfcImpl.onTagDiscovered(tag); |
+ } |
+ } |
+ |
+ private void enableReaderMode() { |
+ if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) return; |
+ if (mReaderCallbackHandler != null) return; |
+ |
+ mReaderCallbackHandler = new ReaderCallbackHandler(this); |
+ mNfcAdapter.enableReaderMode(mActivity, mReaderCallbackHandler, |
+ NfcAdapter.FLAG_READER_NFC_A | NfcAdapter.FLAG_READER_NFC_B |
+ | NfcAdapter.FLAG_READER_NFC_F | NfcAdapter.FLAG_READER_NFC_V, |
+ null); |
+ } |
+ |
+ private void disableReaderMode() { |
+ if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) return; |
+ |
+ mReaderCallbackHandler = null; |
+ mNfcAdapter.disableReaderMode(mActivity); |
+ } |
+ |
+ private interface TagTechnologyWriter { |
+ public void write(NdefMessage message) |
+ throws IOException, TagLostException, FormatException; |
+ } |
+ |
+ private static class NdefWriter implements TagTechnologyWriter { |
+ private final Ndef mNdef; |
+ |
+ NdefWriter(Ndef ndef) { |
+ mNdef = ndef; |
+ } |
+ |
+ public void write(NdefMessage message) |
+ throws IOException, TagLostException, FormatException { |
+ mNdef.writeNdefMessage(message); |
+ } |
+ } |
+ |
+ private static class NdefFormattableWriter implements TagTechnologyWriter { |
+ private final NdefFormatable mNdefFormattable; |
+ |
+ NdefFormattableWriter(NdefFormatable ndefFormattable) { |
+ mNdefFormattable = ndefFormattable; |
+ } |
+ |
+ public void write(NdefMessage message) |
+ throws IOException, TagLostException, FormatException { |
+ mNdefFormattable.format(message); |
+ } |
+ } |
+ |
+ private static class NfcTagWriter { |
+ private final TagTechnology mTech; |
+ private final TagTechnologyWriter mTechWriter; |
+ private boolean mWasConnected = false; |
+ |
+ public static NfcTagWriter create(Tag tag) { |
+ if (tag == null) return null; |
+ |
+ Ndef ndef = Ndef.get(tag); |
+ if (ndef != null) return new NfcTagWriter(ndef, new NdefWriter(ndef)); |
+ |
+ NdefFormatable formattable = NdefFormatable.get(tag); |
+ if (formattable != null) { |
+ return new NfcTagWriter(formattable, new NdefFormattableWriter(formattable)); |
+ } |
+ |
+ return null; |
+ } |
+ |
+ private NfcTagWriter(TagTechnology tech, TagTechnologyWriter writer) { |
+ mTech = tech; |
+ mTechWriter = writer; |
+ } |
+ |
+ public void connect() throws IOException, TagLostException { |
+ if (!mTech.isConnected()) { |
+ mTech.connect(); |
+ mWasConnected = true; |
+ } |
+ } |
+ |
+ public void close() throws IOException { |
+ mTech.close(); |
+ } |
+ |
+ public void write(NdefMessage message) |
+ throws IOException, TagLostException, FormatException { |
+ mTechWriter.write(message); |
+ } |
+ |
+ public boolean isTagOutOfRange() { |
+ try { |
+ connect(); |
+ } catch (IOException e) { |
+ return mWasConnected; |
+ } |
+ return false; |
+ } |
+ } |
+ |
+ private static class InvalidMessageException extends Exception {} |
+ |
+ private NdefMessage toNdefMessage(NfcMessage message) throws InvalidMessageException { |
+ if (message == null || message.data.length == 0) throw new InvalidMessageException(); |
+ |
+ try { |
+ List<NdefRecord> records = new ArrayList<NdefRecord>(); |
+ for (NfcRecord record : message.data) { |
+ records.add(toNdefRecord(record)); |
+ } |
+ records.add(NdefRecord.createExternal(DOMAIN, TYPE, message.url.getBytes())); |
+ NdefRecord[] ndefRecords = new NdefRecord[records.size()]; |
+ records.toArray(ndefRecords); |
+ return new NdefMessage(ndefRecords); |
+ } catch (UnsupportedEncodingException | InvalidMessageException |
+ | IllegalArgumentException e) { |
+ throw new InvalidMessageException(); |
+ } |
+ } |
+ |
+ private String getCharset(NfcRecord record) { |
+ if (record.mediaType.endsWith(CHARSET_UTF8)) return "UTF-8"; |
+ |
+ if (record.mediaType.endsWith(CHARSET_UTF16)) return "UTF-16LE"; |
timvolodine
2016/04/26 14:58:27
why UTF-16LE? CHARSET_UTF16 doesn't specify LE.
shalamov
2016/04/26 21:56:53
When 16bit WTF::String data is converted to bytear
timvolodine
2016/04/28 17:06:34
yes utf-16be usually tends to be the default, mayb
shalamov
2016/05/11 14:09:57
Done.
|
+ |
+ Log.w(TAG, "Unknown charset, using UTF-8 by default."); |
+ return "UTF-8"; |
+ } |
+ |
+ private NdefRecord toNdefRecord(NfcRecord record) |
+ throws InvalidMessageException, IllegalArgumentException, UnsupportedEncodingException { |
+ switch (record.recordType) { |
+ case NfcRecordType.URL: |
+ return NdefRecord.createUri(new String(record.data, getCharset(record))); |
+ case NfcRecordType.TEXT: |
+ if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { |
+ return NdefRecord.createTextRecord( |
+ "en-US", new String(record.data, getCharset(record))); |
+ } else { |
+ return NdefRecord.createMime(TEXT_MIME, record.data); |
+ } |
+ case NfcRecordType.JSON: |
+ case NfcRecordType.OPAQUE_RECORD: |
+ return NdefRecord.createMime(record.mediaType, record.data); |
+ default: |
+ throw new InvalidMessageException(); |
+ } |
+ } |
+ |
+ private void pendingPushOperationCompleted(NfcError error) { |
+ if (mPendingPushOperation != null) { |
+ mPendingPushOperation.complete(error); |
+ mPendingPushOperation = null; |
+ } |
+ |
+ if (error != null) mTagWriter = null; |
+ } |
+ |
+ private void processPendingPushOperation() { |
+ if (mTagWriter == null || mPendingPushOperation == null) return; |
+ |
+ if (mTagWriter.isTagOutOfRange()) { |
+ mTagWriter = null; |
+ return; |
+ } |
+ |
+ try { |
+ mTagWriter.connect(); |
+ mTagWriter.write(toNdefMessage(mPendingPushOperation.message())); |
+ pendingPushOperationCompleted(null); |
+ mTagWriter.close(); |
+ } catch (InvalidMessageException e) { |
+ Log.w(TAG, "Cannot write data to NFC tag. Invalid NfcMessage."); |
+ pendingPushOperationCompleted(createError(NfcErrorType.INVALID_MESSAGE)); |
+ } catch (TagLostException e) { |
+ Log.w(TAG, "Cannot write data to NFC tag. Tag is lost."); |
+ pendingPushOperationCompleted(createError(NfcErrorType.IO_ERROR)); |
+ } catch (FormatException | IOException e) { |
+ Log.w(TAG, "Cannot write data to NFC tag. IO_ERROR."); |
+ pendingPushOperationCompleted(createError(NfcErrorType.IO_ERROR)); |
+ } |
+ } |
+ |
+ public void onTagDiscovered(Tag tag) { |
+ mTagWriter = NfcTagWriter.create(tag); |
+ processPendingPushOperation(); |
+ } |
+} |