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package it.niedermann.owncloud.notes.android.fragment;
import android.os.Bundle;
import android.text.Layout;
import android.text.TextUtils;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewTreeObserver;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.widget.SearchView;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import it.niedermann.owncloud.notes.R;
public abstract class SearchableBaseNoteFragment extends BaseNoteFragment {
private static final String TAG = SearchableBaseNoteFragment.class.getCanonicalName();
private static final String saved_instance_key_searchQuery = "searchQuery";
private static final String saved_instance_key_currentOccurrence = "currentOccurrence";
private int currentOccurrence = 1;
private int occurrenceCount = 0;
private SearchView searchView;
private String searchQuery = null;
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (savedInstanceState != null) {
searchQuery = savedInstanceState.getString(saved_instance_key_searchQuery, "");
currentOccurrence = savedInstanceState.getInt(saved_instance_key_currentOccurrence, 1);
}
}
@Override
public void onPrepareOptionsMenu(@NonNull Menu menu) {
super.onPrepareOptionsMenu(menu);
MenuItem searchMenuItem = menu.findItem(R.id.search);
searchView = (SearchView) searchMenuItem.getActionView();
if (!TextUtils.isEmpty(searchQuery) && isNew) {
searchMenuItem.expandActionView();
searchView.setQuery(searchQuery, true);
searchView.clearFocus();
} else {
searchMenuItem.collapseActionView();
}
final LinearLayout searchEditFrame = searchView.findViewById(R.id
.search_edit_frame);
searchEditFrame.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
int oldVisibility = -1;
@Override
public void onGlobalLayout() {
int currentVisibility = searchEditFrame.getVisibility();
if (currentVisibility != oldVisibility) {
if (currentVisibility != View.VISIBLE) {
colorWithText("", null);
searchQuery = "";
hideSearchFabs();
} else {
jumpToOccurrence();
colorWithText(searchQuery, null);
occurrenceCount = countOccurrences(getContent(), searchQuery);
showSearchFabs();
}
oldVisibility = currentVisibility;
}
}
});
FloatingActionButton next = getSearchNextButton();
FloatingActionButton prev = getSearchPrevButton();
if (next != null) {
next.setOnClickListener(v -> {
currentOccurrence++;
colorWithText(searchView.getQuery().toString(), currentOccurrence);
jumpToOccurrence();
});
}
if (prev != null) {
prev.setOnClickListener(v -> {
currentOccurrence--;
colorWithText(searchView.getQuery().toString(), currentOccurrence);
jumpToOccurrence();
});
}
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
currentOccurrence++;
jumpToOccurrence();
return true;
}
@Override
public boolean onQueryTextChange(String newText) {
searchQuery = newText;
occurrenceCount = countOccurrences(getContent(), searchQuery);
if (occurrenceCount > 1) {
showSearchFabs();
} else {
hideSearchFabs();
}
currentOccurrence = 1;
jumpToOccurrence();
colorWithText(searchQuery, currentOccurrence);
return true;
}
});
}
@Override
public void onSaveInstanceState(@NonNull Bundle outState) {
super.onSaveInstanceState(outState);
if (searchView != null && !TextUtils.isEmpty(searchView.getQuery().toString())) {
outState.putString(saved_instance_key_searchQuery, searchView.getQuery().toString());
outState.putInt(saved_instance_key_currentOccurrence, currentOccurrence);
}
}
protected abstract void colorWithText(@NonNull String newText, @Nullable Integer current);
protected abstract ScrollView getScrollView();
protected abstract Layout getLayout();
protected abstract FloatingActionButton getSearchNextButton();
protected abstract FloatingActionButton getSearchPrevButton();
private void showSearchFabs() {
FloatingActionButton next = getSearchNextButton();
FloatingActionButton prev = getSearchPrevButton();
if (prev != null) {
prev.show();
}
if (next != null) {
next.show();
}
}
private void hideSearchFabs() {
FloatingActionButton next = getSearchNextButton();
FloatingActionButton prev = getSearchPrevButton();
if (prev != null) {
prev.hide();
}
if (next != null) {
next.hide();
}
}
private void jumpToOccurrence() {
Layout layout = getLayout();
if (layout == null) {
Log.w(TAG, "getLayout() is null");
} else if (getContent() == null || getContent().isEmpty()) {
Log.w(TAG, "getContent is null or empty");
} else if (currentOccurrence < 1) {
// if currentOccurrence is lower than 1, jump to last occurrence
currentOccurrence = occurrenceCount;
jumpToOccurrence();
} else if (searchQuery != null && !searchQuery.isEmpty()) {
String currentContent = getContent().toLowerCase();
int indexOfNewText = indexOfNth(currentContent, searchQuery.toLowerCase(), 0, currentOccurrence);
if (indexOfNewText <= 0) {
// Search term is not n times in text
// Go back to first search result
if (currentOccurrence != 1) {
currentOccurrence = 1;
jumpToOccurrence();
}
return;
}
String textUntilFirstOccurrence = currentContent.substring(0, indexOfNewText);
int numberLine = layout.getLineForOffset(textUntilFirstOccurrence.length());
if (numberLine >= 0) {
getScrollView().post(() -> getScrollView().smoothScrollTo(0, layout.getLineTop(numberLine)));
}
}
}
private static int indexOfNth(String input, String value, int startIndex, int nth) {
if (nth < 1)
throw new IllegalArgumentException("Param 'nth' must be greater than 0!");
if (nth == 1)
return input.indexOf(value, startIndex);
int idx = input.indexOf(value, startIndex);
if (idx == -1)
return -1;
return indexOfNth(input, value, idx + 1, nth - 1);
}
private static int countOccurrences(String haystack, String needle) {
if (haystack == null || haystack.isEmpty() || needle == null || needle.isEmpty()) {
return 0;
}
int lastIndex = 0;
int count = 0;
while (lastIndex != -1) {
lastIndex = haystack.toLowerCase().indexOf(needle.toLowerCase(), lastIndex);
if (lastIndex != -1) {
count++;
lastIndex += needle.length();
}
}
return count;
}
}
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