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/*
* Copyright (C) 2015 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.launcher3.allapps.search;
import android.text.Editable;
import android.text.SpannableStringBuilder;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.text.style.SuggestionSpan;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.view.inputmethod.EditorInfo;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;
import com.android.launcher3.ExtendedEditText;
import com.android.launcher3.Utilities;
import com.android.launcher3.allapps.BaseAllAppsAdapter.AdapterItem;
import com.android.launcher3.config.FeatureFlags;
import com.android.launcher3.search.SearchAlgorithm;
import com.android.launcher3.search.SearchCallback;
import com.android.launcher3.views.ActivityContext;
/**
* An interface to a search box that AllApps can command.
*/
public class AllAppsSearchBarController
implements TextWatcher, OnEditorActionListener, ExtendedEditText.OnBackKeyListener,
OnFocusChangeListener {
protected ActivityContext mLauncher;
protected SearchCallback<AdapterItem> mCallback;
protected ExtendedEditText mInput;
protected String mQuery;
private String[] mTextConversions;
protected SearchAlgorithm<AdapterItem> mSearchAlgorithm;
public void setVisibility(int visibility) {
mInput.setVisibility(visibility);
}
/**
* Sets the references to the apps model and the search result callback.
*/
public final void initialize(
SearchAlgorithm<AdapterItem> searchAlgorithm, ExtendedEditText input,
ActivityContext launcher, SearchCallback<AdapterItem> callback) {
mCallback = callback;
mLauncher = launcher;
mInput = input;
mInput.addTextChangedListener(this);
mInput.setOnEditorActionListener(this);
mInput.setOnBackKeyListener(this);
mInput.addOnFocusChangeListener(this);
mSearchAlgorithm = searchAlgorithm;
}
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
// Do nothing
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
mTextConversions = extractTextConversions(s);
}
/**
* Extract text conversions from composing text and send them for search.
*/
public static String[] extractTextConversions(CharSequence text) {
if (text instanceof SpannableStringBuilder) {
SpannableStringBuilder spanned = (SpannableStringBuilder) text;
SuggestionSpan[] suggestionSpans =
spanned.getSpans(0, text.length(), SuggestionSpan.class);
if (suggestionSpans != null && suggestionSpans.length > 0) {
spanned.removeSpan(suggestionSpans[0]);
return suggestionSpans[0].getSuggestions();
}
}
return null;
}
@Override
public void afterTextChanged(final Editable s) {
mQuery = s.toString();
if (mQuery.isEmpty()) {
mSearchAlgorithm.cancel(true);
mCallback.clearSearchResult();
} else {
mSearchAlgorithm.cancel(false);
mSearchAlgorithm.doSearch(mQuery, mTextConversions, mCallback);
}
}
public void refreshSearchResult() {
if (TextUtils.isEmpty(mQuery)) {
return;
}
// If play store continues auto updating an app, we want to show partial result.
mSearchAlgorithm.cancel(false);
mSearchAlgorithm.doSearch(mQuery, mCallback);
}
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_ACTION_SEARCH || actionId == EditorInfo.IME_ACTION_GO) {
// selectFocusedView should return SearchTargetEvent that is passed onto onClick
return mLauncher.getAppsView().getMainAdapterProvider().launchHighlightedItem();
}
return false;
}
@Override
public boolean onBackKey() {
// Only hide the search field if there is no query
String query = Utilities.trim(mInput.getEditableText().toString());
if (query.isEmpty()) {
reset();
return true;
}
return false;
}
@Override
public void onFocusChange(View view, boolean hasFocus) {
if (!hasFocus && !FeatureFlags.ENABLE_DEVICE_SEARCH.get()) {
mInput.hideKeyboard();
}
}
/**
* Resets the search bar state.
*/
public void reset() {
mCallback.clearSearchResult();
mInput.reset();
mQuery = null;
mInput.removeOnFocusChangeListener(this);
}
/**
* Focuses the search field to handle key events.
*/
public void focusSearchField() {
mInput.showKeyboard();
}
/**
* Returns whether the search field is focused.
*/
public boolean isSearchFieldFocused() {
return mInput.isFocused();
}
}
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