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112 lines
3.4 KiB
112 lines
3.4 KiB
/*
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*
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* $Id: k3bstringutils.cpp 619556 2007-01-03 17:38:12Z trueg $
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* Copyright (C) 2003 Sebastian Trueg <trueg@k3b.org>
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*
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* This file is part of the K3b project.
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* Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
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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 2 of the License, or
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* (at your option) any later version.
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* See the file "COPYING" for the exact licensing terms.
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*/
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#include "k3bstringutils.h"
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#include <qfontmetrics.h>
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#include <kdebug.h>
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QString K3b::cutToWidth( const QFontMetrics& fm, const QString& fullText, int cutWidth )
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{
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QString squeezedText = "...";
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int squeezedWidth = fm.width(squeezedText);
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int textWidth = fm.width(fullText);
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if( textWidth <= cutWidth ) {
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return fullText;
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}
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if( fm.width(fullText.right(1) + "..." ) > cutWidth ) {
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kdDebug() << "(K3b::cutToWidth) not able to cut text to " << cutWidth << "!" << endl;
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return fullText.right(1) + "...";
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}
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// estimate how many letters we can add to the dots
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int letters = fullText.length() * (cutWidth - squeezedWidth) / textWidth;
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squeezedText = fullText.left(letters) + "...";
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squeezedWidth = fm.width(squeezedText);
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if (squeezedWidth < cutWidth) {
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// we estimated too short
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// add letters while text < label
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do {
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letters++;
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squeezedText = fullText.left(letters) + "...";
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squeezedWidth = fm.width(squeezedText);
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} while (squeezedWidth < cutWidth);
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letters--;
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squeezedText = fullText.left(letters) + "...";
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} else if (squeezedWidth > cutWidth) {
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// we estimated too long
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// remove letters while text > label
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do {
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letters--;
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squeezedText = fullText.left(letters) + "...";
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squeezedWidth = fm.width(squeezedText);
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} while (squeezedWidth > cutWidth);
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}
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return squeezedText;
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}
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// from KSqueezedTextLabel
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QString K3b::squeezeTextToWidth( const QFontMetrics& fm, const QString& fullText, int cutWidth )
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{
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int textWidth = fm.width(fullText);
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if (textWidth > cutWidth) {
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// start with the dots only
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QString squeezedText = "...";
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int squeezedWidth = fm.width(squeezedText);
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// estimate how many letters we can add to the dots on both sides
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int letters = fullText.length() * (cutWidth - squeezedWidth) / textWidth / 2;
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if (cutWidth < squeezedWidth) letters=1;
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squeezedText = fullText.left(letters) + "..." + fullText.right(letters);
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squeezedWidth = fm.width(squeezedText);
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if (squeezedWidth < cutWidth) {
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// we estimated too short
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// add letters while text < label
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do {
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letters++;
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squeezedText = fullText.left(letters) + "..." + fullText.right(letters);
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squeezedWidth = fm.width(squeezedText);
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} while (squeezedWidth < cutWidth);
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letters--;
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squeezedText = fullText.left(letters) + "..." + fullText.right(letters);
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}
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else if (squeezedWidth > cutWidth) {
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// we estimated too long
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// remove letters while text > label
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do {
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letters--;
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squeezedText = fullText.left(letters) + "..." + fullText.right(letters);
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squeezedWidth = fm.width(squeezedText);
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} while (letters > 2 && squeezedWidth > cutWidth);
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}
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if (letters == 2)
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kdDebug() << "(K3b::squeezeTextToWidth) WARNING: unable to squeeze text to width "
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<< cutWidth << endl;
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return squeezedText;
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}
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else
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return fullText;
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}
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