59 lines
1.7 KiB
Dart
59 lines
1.7 KiB
Dart
/*
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* Copyright (c) 2024-2026 Fabian Freund.
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*
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* This file is part of WebLibre
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* (see https://weblibre.eu).
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import 'package:flutter/material.dart';
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int _getLineCountUsingBoxes(String text, TextStyle style, double maxWidth) {
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final textSpan = TextSpan(text: text, style: style);
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final textPainter = TextPainter(
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text: textSpan,
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textDirection: TextDirection.ltr,
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);
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textPainter.layout(maxWidth: maxWidth);
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// Select all text
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final selection = TextSelection(baseOffset: 0, extentOffset: text.length);
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// Each box represents one line
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final lines = textPainter.getBoxesForSelection(selection);
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return lines.length;
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}
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int? getTextFieldLineCount(GlobalKey key, String text, TextStyle style) {
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final box = key.currentContext?.findRenderObject();
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if (box case final RenderBox box) {
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final width = box.size.width;
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return _getLineCountUsingBoxes(text, style, width);
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}
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return null;
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}
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double? getTextFieldHeight(GlobalKey key) {
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final box = key.currentContext?.findRenderObject();
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if (box case final RenderBox box) {
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return box.size.height;
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}
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return null;
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}
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