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/*
* Copyright (C) 2007-2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.android.internal.widget;
import android.os.Bundle;
import android.text.Editable;
import android.text.Spanned;
import android.text.method.KeyListener;
import android.text.style.SuggestionSpan;
import android.util.Log;
import android.view.inputmethod.BaseInputConnection;
import android.view.inputmethod.CompletionInfo;
import android.view.inputmethod.CorrectionInfo;
import android.view.inputmethod.ExtractedText;
import android.view.inputmethod.ExtractedTextRequest;
import android.view.inputmethod.InputConnection;
import android.widget.TextView;
public class EditableInputConnection extends BaseInputConnection {
private static final boolean DEBUG = false;
private static final String TAG = "EditableInputConnection";
private final TextView mTextView;
// Keeps track of nested begin/end batch edit to ensure this connection always has a
// balanced impact on its associated TextView.
// A negative value means that this connection has been finished by the InputMethodManager.
private int mBatchEditNesting;
public EditableInputConnection(TextView textview) {
super(textview, true);
mTextView = textview;
}
@Override
public Editable getEditable() {
TextView tv = mTextView;
if (tv != null) {
return tv.getEditableText();
}
return null;
}
@Override
public boolean beginBatchEdit() {
synchronized(this) {
if (mBatchEditNesting >= 0) {
mTextView.beginBatchEdit();
mBatchEditNesting++;
return true;
}
}
return false;
}
@Override
public boolean endBatchEdit() {
synchronized(this) {
if (mBatchEditNesting > 0) {
// When the connection is reset by the InputMethodManager and reportFinish
// is called, some endBatchEdit calls may still be asynchronously received from the
// IME. Do not take these into account, thus ensuring that this IC's final
// contribution to mTextView's nested batch edit count is zero.
mTextView.endBatchEdit();
mBatchEditNesting--;
return true;
}
}
return false;
}
@Override
protected void reportFinish() {
super.reportFinish();
synchronized(this) {
while (mBatchEditNesting > 0) {
endBatchEdit();
}
// Will prevent any further calls to begin or endBatchEdit
mBatchEditNesting = -1;
}
}
@Override
public boolean clearMetaKeyStates(int states) {
final Editable content = getEditable();
if (content == null) return false;
KeyListener kl = mTextView.getKeyListener();
if (kl != null) {
try {
kl.clearMetaKeyState(mTextView, content, states);
} catch (AbstractMethodError e) {
// This is an old listener that doesn't implement the
// new method.
}
}
return true;
}
@Override
public boolean commitCompletion(CompletionInfo text) {
if (DEBUG) Log.v(TAG, "commitCompletion " + text);
mTextView.beginBatchEdit();
mTextView.onCommitCompletion(text);
mTextView.endBatchEdit();
return true;
}
/**
* Calls the {@link TextView#onCommitCorrection} method of the associated TextView.
*/
@Override
public boolean commitCorrection(CorrectionInfo correctionInfo) {
if (DEBUG) Log.v(TAG, "commitCorrection" + correctionInfo);
mTextView.beginBatchEdit();
mTextView.onCommitCorrection(correctionInfo);
mTextView.endBatchEdit();
return true;
}
@Override
public boolean performEditorAction(int actionCode) {
if (DEBUG) Log.v(TAG, "performEditorAction " + actionCode);
mTextView.onEditorAction(actionCode);
return true;
}
@Override
public boolean performContextMenuAction(int id) {
if (DEBUG) Log.v(TAG, "performContextMenuAction " + id);
mTextView.beginBatchEdit();
mTextView.onTextContextMenuItem(id);
mTextView.endBatchEdit();
return true;
}
@Override
public ExtractedText getExtractedText(ExtractedTextRequest request, int flags) {
if (mTextView != null) {
ExtractedText et = new ExtractedText();
if (mTextView.extractText(request, et)) {
if ((flags&GET_EXTRACTED_TEXT_MONITOR) != 0) {
mTextView.setExtracting(request);
}
return et;
}
}
return null;
}
@Override
public boolean performPrivateCommand(String action, Bundle data) {
mTextView.onPrivateIMECommand(action, data);
return true;
}
@Override
public boolean commitText(CharSequence text, int newCursorPosition) {
if (mTextView == null) {
return super.commitText(text, newCursorPosition);
}
if (text instanceof Spanned) {
Spanned spanned = ((Spanned) text);
SuggestionSpan[] spans = spanned.getSpans(0, text.length(), SuggestionSpan.class);
mIMM.registerSuggestionSpansForNotification(spans);
}
mTextView.resetErrorChangedFlag();
boolean success = super.commitText(text, newCursorPosition);
mTextView.hideErrorIfUnchanged();
return success;
}
@Override
public boolean requestCursorUpdates(int cursorUpdateMode) {
if (DEBUG) Log.v(TAG, "requestUpdateCursorAnchorInfo " + cursorUpdateMode);
// It is possible that any other bit is used as a valid flag in a future release.
// We should reject the entire request in such a case.
final int KNOWN_FLAGS_MASK = InputConnection.CURSOR_UPDATE_IMMEDIATE |
InputConnection.CURSOR_UPDATE_MONITOR;
final int unknownFlags = cursorUpdateMode & ~KNOWN_FLAGS_MASK;
if (unknownFlags != 0) {
if (DEBUG) {
Log.d(TAG, "Rejecting requestUpdateCursorAnchorInfo due to unknown flags." +
" cursorUpdateMode=" + cursorUpdateMode +
" unknownFlags=" + unknownFlags);
}
return false;
}
if (mIMM == null) {
// In this case, TYPE_CURSOR_ANCHOR_INFO is not handled.
// TODO: Return some notification code rather than false to indicate method that
// CursorAnchorInfo is temporarily unavailable.
return false;
}
mIMM.setUpdateCursorAnchorInfoMode(cursorUpdateMode);
if ((cursorUpdateMode & InputConnection.CURSOR_UPDATE_IMMEDIATE) != 0) {
if (mTextView == null) {
// In this case, FLAG_CURSOR_ANCHOR_INFO_IMMEDIATE is silently ignored.
// TODO: Return some notification code for the input method that indicates
// FLAG_CURSOR_ANCHOR_INFO_IMMEDIATE is ignored.
} else if (mTextView.isInLayout()) {
// In this case, the view hierarchy is currently undergoing a layout pass.
// IMM#updateCursorAnchorInfo is supposed to be called soon after the layout
// pass is finished.
} else {
// This will schedule a layout pass of the view tree, and the layout event
// eventually triggers IMM#updateCursorAnchorInfo.
mTextView.requestLayout();
}
}
return true;
}
}
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