Changeset 561 for trunk/src/gui/text/qfontmetrics.cpp

Timestamp:

Feb 11, 2010, 11:19:06 PM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

trunk: Merged in qt 4.6.1 sources.

Location:

trunk

Files:

• . (modified) (1 prop)
• src/gui/text/qfontmetrics.cpp (modified) (37 diffs)

trunk/src/gui/text/qfontmetrics.cpp

@@ -2 +2 @@
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtGui module of the Qt Toolkit.
@@ -21 +22 @@
 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
-** In addition, as a special exception, Nokia gives you certain
-** additional rights. These rights are described in the Nokia Qt LGPL
-** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
-** package.
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** GNU General Public License Usage
@@ -34 +34 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
-** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
 ** $QT_END_LICENSE$
 **
@@ -76 +76 @@
     \brief The QFontMetrics class provides font metrics information.
 
-    \ingroup multimedia
+    \ingroup painting
     \ingroup shared
-    \ingroup text
 
     QFontMetrics functions calculate the size of characters and
@@ -165 +164 @@
 */
 QFontMetrics::QFontMetrics(const QFont &font)
-    : d(font.d)
-{
-    d->ref.ref();
+    : d(font.d.data())
+{
 }
 
@@ -197 +195 @@
         d->screen = screen;
     } else {
-        d = font.d;
-        d->ref.ref();
+        d = font.d.data();
     }
 
@@ -207 +204 @@
 */
 QFontMetrics::QFontMetrics(const QFontMetrics &fm)
-    : d(fm.d)
-{ d->ref.ref(); }
+    : d(fm.d.data())
+{
+}
 
 /*!
@@ -216 +214 @@
 QFontMetrics::~QFontMetrics()
 {
-    if (!d->ref.deref())
-        delete d;
 }
 
@@ -225 +221 @@
 QFontMetrics &QFontMetrics::operator=(const QFontMetrics &fm)
 {
-    qAtomicAssign(d, fm.d);
+    d = fm.d.data();
     return *this;
 }
@@ -529 +525 @@
 int QFontMetrics::width(const QString &text, int len) const
 {
-    if (len < 0)
+    int pos = text.indexOf(QLatin1Char('\x9c'));
+    if (pos != -1) {
+        len = (len < 0) ? pos : qMin(pos, len);
+    } else if (len < 0) {
         len = text.length();
+    }
     if (len == 0)
         return 0;
 
-    QTextEngine layout(text, d);
+    QTextEngine layout(text, d.data());
     layout.ignoreBidi = true;
     return qRound(layout.width(0, len));
@@ -558 +558 @@
     characters or non-spacing marks in the middle of a string, as the
     glyph shaping and positioning of marks that happens when
-    processing strings cannot be taken into account. Use charWidth()
-    instead if you aren't looking for the width of isolated
-    characters.
-
-    \sa boundingRect(), charWidth()
+    processing strings cannot be taken into account. When implementing
+    an interactive text control, use QTextLayout instead.
+
+    \sa boundingRect()
 */
 int QFontMetrics::width(QChar ch) const
@@ -611 +610 @@
         int to = qMin(text.length(), pos + 8);
         QString cstr = QString::fromRawData(text.unicode() + from, to - from);
-        QTextEngine layout(cstr, d);
+        QTextEngine layout(cstr, d.data());
         layout.ignoreBidi = true;
         layout.itemize();
@@ -660 +659 @@
         return QRect();
 
-    QTextEngine layout(text, d);
+    QTextEngine layout(text, d.data());
     layout.ignoreBidi = true;
     layout.itemize();
@@ -671 +670 @@
     were to be drawn at the origin of the coordinate system.
 
-    Note that the bounding rectangle may extend to the left of (0, 0),
-    e.g. for italicized fonts, and that the text output may cover \e
+    Note that the bounding rectangle may extend to the left of (0, 0)
+    (e.g., for italicized fonts), and that the text output may cover \e
     all pixels in the bounding rectangle. For a space character the rectangle
     will usually be empty.
@@ -725 +724 @@
     \o Qt::TextSingleLine ignores newline characters in the text.
     \o Qt::TextExpandTabs expands tabs (see below)
-    \o Qt::TextShowMnemonic interprets "&amp;x" as \underline{x}, i.e. underlined.
+    \o Qt::TextShowMnemonic interprets "&x" as \underline{x}; i.e., underlined.
     \o Qt::TextWordWrap breaks the text to fit the rectangle.
     \endlist
@@ -769 +768 @@
     QRectF rb;
     QRectF rr(rect);
-    qt_format_text(QFont(d), rr, flags | Qt::TextDontPrint, text, &rb, tabStops, tabArray,
+    qt_format_text(QFont(d.data()), rr, flags | Qt::TextDontPrint, text, &rb, tabStops, tabArray,
                    tabArrayLen, 0);
 
@@ -782 +781 @@
     \o Qt::TextSingleLine ignores newline characters.
     \o Qt::TextExpandTabs expands tabs (see below)
-    \o Qt::TextShowMnemonic interprets "&amp;x" as \underline{x}, i.e. underlined.
+    \o Qt::TextShowMnemonic interprets "&x" as \underline{x}; i.e., underlined.
     \o Qt::TextWordBreak breaks the text to fit the rectangle.
     \endlist
@@ -800 +799 @@
 QSize QFontMetrics::size(int flags, const QString &text, int tabStops, int *tabArray) const
 {
-    return boundingRect(QRect(0,0,0,0), flags, text, tabStops, tabArray).size();
+    return boundingRect(QRect(0,0,0,0), flags | Qt::TextLongestVariant, text, tabStops, tabArray).size();
 }
 
@@ -830 +829 @@
         return QRect();
 
-    QTextEngine layout(text, d);
+    QTextEngine layout(text, d.data());
     layout.ignoreBidi = true;
     layout.itemize();
@@ -859 +858 @@
     layouts. Note that this behavior is independent of the text
     language.
-
 */
 QString QFontMetrics::elidedText(const QString &text, Qt::TextElideMode mode, int width, int flags) const
 {
-    QStackTextEngine engine(text, QFont(d));
+    QString _text = text;
+    if (!(flags & Qt::TextLongestVariant)) {
+        int posA = 0;
+        int posB = _text.indexOf(QLatin1Char('\x9c'));
+        while (posB >= 0) {
+            QString portion = _text.mid(posA, posB - posA);
+            if (size(flags, portion).width() <= width)
+                return portion;
+            posA = posB + 1;
+            posB = _text.indexOf(QLatin1Char('\x9c'), posA);
+        }
+        _text = _text.mid(posA);
+    }
+    QStackTextEngine engine(_text, QFont(d.data()));
     return engine.elidedText(mode, width, flags);
 }
@@ -929 +940 @@
     \brief The QFontMetricsF class provides font metrics information.
 
-    \ingroup multimedia
+    \ingroup painting
     \ingroup shared
-    \ingroup text
 
     QFontMetricsF functions calculate the size of characters and
@@ -977 +987 @@
 */
 QFontMetricsF::QFontMetricsF(const QFontMetrics &fontMetrics)
-    : d(fontMetrics.d)
-{
-    d->ref.ref();
+    : d(fontMetrics.d.data())
+{
 }
 
@@ -989 +998 @@
 QFontMetricsF &QFontMetricsF::operator=(const QFontMetrics &other)
 {
-    qAtomicAssign(d, other.d);
+    d = other.d.data();
     return *this;
 }
@@ -1007 +1016 @@
 */
 QFontMetricsF::QFontMetricsF(const QFont &font)
-    : d(font.d)
-{
-    d->ref.ref();
+    : d(font.d.data())
+{
 }
 
@@ -1039 +1047 @@
         d->screen = screen;
     } else {
-        d = font.d;
-        d->ref.ref();
+        d = font.d.data();
     }
 
@@ -1049 +1056 @@
 */
 QFontMetricsF::QFontMetricsF(const QFontMetricsF &fm)
-    : d(fm.d)
-{ d->ref.ref(); }
+    : d(fm.d.data())
+{
+}
 
 /*!
@@ -1058 +1066 @@
 QFontMetricsF::~QFontMetricsF()
 {
-    if (!d->ref.deref())
-        delete d;
 }
 
@@ -1067 +1073 @@
 QFontMetricsF &QFontMetricsF::operator=(const QFontMetricsF &fm)
 {
-    qAtomicAssign(d, fm.d);
+    d = fm.d.data();
     return *this;
 }
@@ -1362 +1368 @@
 qreal QFontMetricsF::width(const QString &text) const
 {
-    QTextEngine layout(text, d);
+    int pos = text.indexOf(QLatin1Char('\x9c'));
+    int len = (pos != -1) ? pos : text.length();
+
+    QTextEngine layout(text, d.data());
     layout.ignoreBidi = true;
     layout.itemize();
-    return layout.width(0, text.length()).toReal();
+    return layout.width(0, len).toReal();
 }
 
@@ -1387 +1396 @@
     characters or non-spacing marks in the middle of a string, as the
     glyph shaping and positioning of marks that happens when
-    processing strings cannot be taken into account. Use charWidth()
-    instead if you aren't looking for the width of isolated
-    characters.
+    processing strings cannot be taken into account. When implementing
+    an interactive text control, use QTextLayout instead.
 
     \sa boundingRect()
@@ -1440 +1448 @@
         return QRectF();
 
-    QTextEngine layout(text, d);
+    QTextEngine layout(text, d.data());
     layout.ignoreBidi = true;
     layout.itemize();
@@ -1501 +1509 @@
     \o Qt::TextSingleLine ignores newline characters in the text.
     \o Qt::TextExpandTabs expands tabs (see below)
-    \o Qt::TextShowMnemonic interprets "&amp;x" as \underline{x}, i.e. underlined.
+    \o Qt::TextShowMnemonic interprets "&x" as \underline{x}; i.e., underlined.
     \o Qt::TextWordWrap breaks the text to fit the rectangle.
     \endlist
@@ -1548 +1556 @@
 
     QRectF rb;
-    qt_format_text(QFont(d), rect, flags | Qt::TextDontPrint, text, &rb, tabStops, tabArray,
+    qt_format_text(QFont(d.data()), rect, flags | Qt::TextDontPrint, text, &rb, tabStops, tabArray,
                    tabArrayLen, 0);
     return rb;
@@ -1560 +1568 @@
     \o Qt::TextSingleLine ignores newline characters.
     \o Qt::TextExpandTabs expands tabs (see below)
-    \o Qt::TextShowMnemonic interprets "&amp;x" as \underline{x}, i.e. underlined.
+    \o Qt::TextShowMnemonic interprets "&x" as \underline{x}; i.e., underlined.
     \o Qt::TextWordBreak breaks the text to fit the rectangle.
     \endlist
@@ -1583 +1591 @@
 QSizeF QFontMetricsF::size(int flags, const QString &text, int tabStops, int *tabArray) const
 {
-    return boundingRect(QRectF(), flags, text, tabStops, tabArray).size();
+    return boundingRect(QRectF(), flags | Qt::TextLongestVariant, text, tabStops, tabArray).size();
 }
 
@@ -1613 +1621 @@
         return QRect();
 
-    QTextEngine layout(text, d);
+    QTextEngine layout(text, d.data());
     layout.ignoreBidi = true;
     layout.itemize();
@@ -1638 +1646 @@
 QString QFontMetricsF::elidedText(const QString &text, Qt::TextElideMode mode, qreal width, int flags) const
 {
-    QStackTextEngine engine(text, QFont(d));
+    QString _text = text;
+    if (!(flags & Qt::TextLongestVariant)) {
+        int posA = 0;
+        int posB = _text.indexOf(QLatin1Char('\x9c'));
+        while (posB >= 0) {
+            QString portion = _text.mid(posA, posB - posA);
+            if (size(flags, portion).width() <= width)
+                return portion;
+            posA = posB + 1;
+            posB = _text.indexOf(QLatin1Char('\x9c'), posA);
+        }
+        _text = _text.mid(posA);
+    }
+    QStackTextEngine engine(_text, QFont(d.data()));
     return engine.elidedText(mode, QFixed::fromReal(width), flags);
 }