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-rw-r--r--libk3b/tools/k3bstringutils.cpp111
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diff --git a/libk3b/tools/k3bstringutils.cpp b/libk3b/tools/k3bstringutils.cpp
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+/*
+ *
+ * $Id: k3bstringutils.cpp 619556 2007-01-03 17:38:12Z trueg $
+ * Copyright (C) 2003 Sebastian Trueg <trueg@k3b.org>
+ *
+ * This file is part of the K3b project.
+ * Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * See the file "COPYING" for the exact licensing terms.
+ */
+
+#include "k3bstringutils.h"
+
+#include <qfontmetrics.h>
+
+#include <kdebug.h>
+
+
+QString K3b::cutToWidth( const QFontMetrics& fm, const QString& fullText, int cutWidth )
+{
+ QString squeezedText = "...";
+ int squeezedWidth = fm.width(squeezedText);
+ int textWidth = fm.width(fullText);
+
+ if( textWidth <= cutWidth ) {
+ return fullText;
+ }
+
+ if( fm.width(fullText.right(1) + "..." ) > cutWidth ) {
+ kdDebug() << "(K3b::cutToWidth) not able to cut text to " << cutWidth << "!" << endl;
+ return fullText.right(1) + "...";
+ }
+
+ // estimate how many letters we can add to the dots
+ int letters = fullText.length() * (cutWidth - squeezedWidth) / textWidth;
+ squeezedText = fullText.left(letters) + "...";
+ squeezedWidth = fm.width(squeezedText);
+
+ if (squeezedWidth < cutWidth) {
+ // we estimated too short
+ // add letters while text < label
+ do {
+ letters++;
+ squeezedText = fullText.left(letters) + "...";
+ squeezedWidth = fm.width(squeezedText);
+ } while (squeezedWidth < cutWidth);
+ letters--;
+ squeezedText = fullText.left(letters) + "...";
+ } else if (squeezedWidth > cutWidth) {
+ // we estimated too long
+ // remove letters while text > label
+ do {
+ letters--;
+ squeezedText = fullText.left(letters) + "...";
+ squeezedWidth = fm.width(squeezedText);
+ } while (squeezedWidth > cutWidth);
+ }
+
+ return squeezedText;
+}
+
+
+// from KSqueezedTextLabel
+QString K3b::squeezeTextToWidth( const QFontMetrics& fm, const QString& fullText, int cutWidth )
+{
+ int textWidth = fm.width(fullText);
+ if (textWidth > cutWidth) {
+ // start with the dots only
+ QString squeezedText = "...";
+ int squeezedWidth = fm.width(squeezedText);
+
+ // estimate how many letters we can add to the dots on both sides
+ int letters = fullText.length() * (cutWidth - squeezedWidth) / textWidth / 2;
+ if (cutWidth < squeezedWidth) letters=1;
+ squeezedText = fullText.left(letters) + "..." + fullText.right(letters);
+ squeezedWidth = fm.width(squeezedText);
+
+ if (squeezedWidth < cutWidth) {
+ // we estimated too short
+ // add letters while text < label
+ do {
+ letters++;
+ squeezedText = fullText.left(letters) + "..." + fullText.right(letters);
+ squeezedWidth = fm.width(squeezedText);
+ } while (squeezedWidth < cutWidth);
+ letters--;
+ squeezedText = fullText.left(letters) + "..." + fullText.right(letters);
+ }
+ else if (squeezedWidth > cutWidth) {
+ // we estimated too long
+ // remove letters while text > label
+ do {
+ letters--;
+ squeezedText = fullText.left(letters) + "..." + fullText.right(letters);
+ squeezedWidth = fm.width(squeezedText);
+ } while (letters > 2 && squeezedWidth > cutWidth);
+ }
+
+ if (letters == 2)
+ kdDebug() << "(K3b::squeezeTextToWidth) WARNING: unable to squeeze text to width "
+ << cutWidth << endl;
+
+ return squeezedText;
+ }
+ else
+ return fullText;
+}