File indexing completed on 2024-04-28 04:02:06

 /*
     SPDX-FileCopyrightText: 2005, 2009 Albert Astals Cid <aacid@kde.org>
 
     SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
 */
 
 #include "kfontutils.h"
 
 // own
 #include "kfourinline_debug.h"
 // Qt
 #include <QFont>
 // Std
 #include <limits>
 
 qreal KFontUtils::adaptFontSize(QGraphicsTextItem *string, qreal width, qreal height, qreal maxFontSize, qreal minFontSize, qreal precision)
 {
     qreal size = maxFontSize;
     QRectF boundingRect;
     // Guard for avoiding possible infinite loop
     qreal lowerBound = 0;
     qreal higherBound = std::numeric_limits<double>::max();
     int count = 0;
 
     // Loop until found a point size that makes the text fit in the rectangle but
     // don't have more than precision pixels of unused space in any axys.
     while (count < 20) {
         QFont f = string->font();
         f.setPointSizeF(size);
         string->setFont(f);
         string->setTextWidth(width);
         boundingRect = string->boundingRect();
         // Error painting the text, return -1
         if (boundingRect.width() == 0 || boundingRect.height() == 0) {
             return -1;
         }
         // Text doesn't fit in rectangle or has too much unused space, adjust size
         else if (boundingRect.height() > height || boundingRect.height() < height - precision) {
             if (boundingRect.width() > width || boundingRect.height() > height)
                 higherBound = qMin(higherBound, size);
             else
                 lowerBound = qMax(lowerBound, size);
 
             if (lowerBound > 0 && higherBound < std::numeric_limits<double>::max()) {
                 size = (lowerBound + higherBound) / 2;
             } else {
                 size = (height / boundingRect.height()) * size;
             }
 
             count++;
         }
         // Text fits correctly
         else {
             break;
         }
     }
 
     // Assure to return a value between minimum and maximum values.
     if (size < minFontSize)
         return minFontSize;
     else if (size > maxFontSize)
         return maxFontSize;
     else
         return size;
 }
 
 qreal KFontUtils::adaptFontSize(QGraphicsTextItem *text, const QSizeF &availableSize, qreal maxFontSize, qreal minFontSize, qreal precision)
 {
     return adaptFontSize(text, availableSize.width(), availableSize.height(), maxFontSize, minFontSize, precision);
 }