69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
// Squawk messenger.
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// Copyright (C) 2019 Yury Gubich <blue@macaw.me>
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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 General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef TEXTMETER_H
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#define TEXTMETER_H
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#include <list>
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#include <set>
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#include <QFontMetrics>
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#include <QFont>
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#include <QSize>
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#include <QFontDatabase>
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class TextMeter
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{
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public:
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TextMeter();
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~TextMeter();
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void initializeFonts(const QFont& font);
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QSize boundingSize(const QString& text, const QSize& limits) const;
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private:
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QFontDatabase base;
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std::list<QFontMetrics> fonts;
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struct Helper {
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Helper(int maxWidth);
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int width;
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int height;
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int wordWidth;
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int wordHeight;
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int delayedSpaceWidth;
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int maxWidth;
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bool wordBeganWithTheLine;
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QString text;
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QString word;
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QChar lastSpace;
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QSize size;
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void computeNewLine(const QFontMetrics& metrics, int horizontalAdvance, const QChar& ch);
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void computeChar(const QChar& ch, const QFontMetrics& metrics);
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void computeNewWord();
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void beginNewLine();
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bool lineOverflow(const QFontMetrics& metrics, int horizontalAdvance, const QChar& ch);
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};
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static bool newLine(const QChar& ch);
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static bool newWord(const QChar& ch);
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static bool visible(const QChar& ch);
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static bool printOnLineBreak(const QChar& ch);
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};
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#endif // TEXTMETER_H
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