Initial import from the monolithic Qt.

This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
Qt Git wiki for how to use Git history grafting. At the time of
writing, this wiki is located here:

http://qt.gitorious.org/qt/pages/GitIntroductionWithQt

If you have already performed the grafting and you don't see any
history beyond this commit, try running "git log" with the "--follow"
argument.

Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 408 insertions, 0 deletions

diff --git a/src/gui/painting/qcssutil.cpp b/src/gui/painting/qcssutil.cpp
new file mode 100644
index 0000000000..729cff504e
--- /dev/null
+++ b/src/gui/painting/qcssutil.cpp
@@ -0,0 +1,408 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qcssutil_p.h"
+#include "private/qcssparser_p.h"
+#include "qpainter.h"
+#include <qmath.h>
+
+#ifndef QT_NO_CSSPARSER
+
+QT_BEGIN_NAMESPACE
+
+using namespace QCss;
+
+static QPen qPenFromStyle(const QBrush& b, qreal width, BorderStyle s)
+{
+    Qt::PenStyle ps = Qt::NoPen;
+
+    switch (s) {
+    case BorderStyle_Dotted:
+        ps  = Qt::DotLine;
+        break;
+    case BorderStyle_Dashed:
+        ps = width == 1 ? Qt::DotLine : Qt::DashLine;
+        break;
+    case BorderStyle_DotDash:
+        ps = Qt::DashDotLine;
+        break;
+    case BorderStyle_DotDotDash:
+        ps = Qt::DashDotDotLine;
+        break;
+    case BorderStyle_Inset:
+    case BorderStyle_Outset:
+    case BorderStyle_Solid:
+        ps = Qt::SolidLine;
+        break;
+    default:
+        break;
+    }
+
+    return QPen(b, width, ps, Qt::FlatCap);
+}
+
+void qDrawRoundedCorners(QPainter *p, qreal x1, qreal y1, qreal x2, qreal y2,
+                         const QSizeF& r1, const QSizeF& r2,
+                         Edge edge, BorderStyle s, QBrush c)
+{
+    const qreal pw = (edge == TopEdge || edge == BottomEdge) ? y2-y1 : x2-x1;
+    if (s == BorderStyle_Double) {
+        qreal wby3 = pw/3;
+        switch (edge) {
+        case TopEdge:
+        case BottomEdge:
+            qDrawRoundedCorners(p, x1, y1, x2, y1+wby3, r1, r2, edge, BorderStyle_Solid, c);
+            qDrawRoundedCorners(p, x1, y2-wby3, x2, y2, r1, r2, edge, BorderStyle_Solid, c);
+            break;
+        case LeftEdge:
+            qDrawRoundedCorners(p, x1, y1+1, x1+wby3, y2, r1, r2, LeftEdge, BorderStyle_Solid, c);
+            qDrawRoundedCorners(p, x2-wby3, y1+1, x2, y2, r1, r2, LeftEdge, BorderStyle_Solid, c);
+            break;
+        case RightEdge:
+            qDrawRoundedCorners(p, x1, y1+1, x1+wby3, y2, r1, r2, RightEdge, BorderStyle_Solid, c);
+            qDrawRoundedCorners(p, x2-wby3, y1+1, x2, y2, r1, r2, RightEdge, BorderStyle_Solid, c);
+            break;
+        default:
+            break;
+        }
+        return;
+    } else if (s == BorderStyle_Ridge || s == BorderStyle_Groove) {
+        BorderStyle s1, s2;
+        if (s == BorderStyle_Groove) {
+            s1 = BorderStyle_Inset;
+            s2 = BorderStyle_Outset;
+        } else {
+            s1 = BorderStyle_Outset;
+            s2 = BorderStyle_Inset;
+        }
+        int pwby2 = qRound(pw/2);
+        switch (edge) {
+        case TopEdge:
+            qDrawRoundedCorners(p, x1, y1, x2, y1 + pwby2, r1, r2, TopEdge, s1, c);
+            qDrawRoundedCorners(p, x1, y1 + pwby2, x2, y2, r1, r2, TopEdge, s2, c);
+            break;
+        case BottomEdge:
+            qDrawRoundedCorners(p, x1, y1 + pwby2, x2, y2, r1, r2, BottomEdge, s1, c);
+            qDrawRoundedCorners(p, x1, y1, x2, y2-pwby2, r1, r2, BottomEdge, s2, c);
+            break;
+        case LeftEdge:
+            qDrawRoundedCorners(p, x1, y1, x1 + pwby2, y2, r1, r2, LeftEdge, s1, c);
+            qDrawRoundedCorners(p, x1 + pwby2, y1, x2, y2, r1, r2, LeftEdge, s2, c);
+            break;
+        case RightEdge:
+            qDrawRoundedCorners(p, x1 + pwby2, y1, x2, y2, r1, r2, RightEdge, s1, c);
+            qDrawRoundedCorners(p, x1, y1, x2 - pwby2, y2, r1, r2, RightEdge, s2, c);
+            break;
+        default:
+            break;
+        }
+    } else if ((s == BorderStyle_Outset && (edge == TopEdge || edge == LeftEdge))
+            || (s == BorderStyle_Inset && (edge == BottomEdge || edge == RightEdge)))
+            c = c.color().lighter();
+
+    p->save();
+    qreal pwby2 = pw/2;
+    p->setBrush(Qt::NoBrush);
+    QPen pen = qPenFromStyle(c, pw, s);
+    pen.setCapStyle(Qt::SquareCap); // this eliminates the offby1 errors that we might hit below
+    p->setPen(pen);
+    switch (edge) {
+    case TopEdge:
+        if (!r1.isEmpty())
+            p->drawArc(QRectF(x1 - r1.width() + pwby2, y1 + pwby2,
+                              2*r1.width() - pw, 2*r1.height() - pw), 135*16, -45*16);
+        if (!r2.isEmpty())
+            p->drawArc(QRectF(x2 - r2.width() + pwby2, y1 + pwby2,
+                       2*r2.width() - pw, 2*r2.height() - pw), 45*16, 45*16);
+        break;
+    case BottomEdge:
+        if (!r1.isEmpty())
+            p->drawArc(QRectF(x1 - r1.width() + pwby2, y2 - 2*r1.height() + pwby2,
+                              2*r1.width() - pw, 2*r1.height() - pw), -90 * 16, -45 * 16);
+        if (!r2.isEmpty())
+            p->drawArc(QRectF(x2 - r2.width() + pwby2, y2 - 2*r2.height() + pwby2,
+                       2*r2.width() - pw, 2*r2.height() - pw), -90 * 16, 45 * 16);
+        break;
+    case LeftEdge:
+        if (!r1.isEmpty())
+            p->drawArc(QRectF(x1 + pwby2, y1 - r1.height() + pwby2,
+                       2*r1.width() - pw, 2*r1.height() - pw), 135*16, 45*16);
+        if (!r2.isEmpty())
+            p->drawArc(QRectF(x1 + pwby2, y2 - r2.height() + pwby2,
+                       2*r2.width() - pw, 2*r2.height() - pw), 180*16, 45*16);
+        break;
+    case RightEdge:
+        if (!r1.isEmpty())
+            p->drawArc(QRectF(x2 - 2*r1.width() + pwby2, y1 - r1.height() + pwby2,
+                       2*r1.width() - pw, 2*r1.height() - pw), 45*16, -45*16);
+        if (!r2.isEmpty())
+            p->drawArc(QRectF(x2 - 2*r2.width() + pwby2, y2 - r2.height() + pwby2,
+                       2*r2.width() - pw, 2*r2.height() - pw), 315*16, 45*16);
+        break;
+    default:
+        break;
+    }
+    p->restore();
+}
+
+
+void qDrawEdge(QPainter *p, qreal x1, qreal y1, qreal x2, qreal y2, qreal dw1, qreal dw2,
+               QCss::Edge edge, QCss::BorderStyle style, QBrush c)
+{
+    p->save();
+    const qreal width = (edge == TopEdge || edge == BottomEdge) ? (y2-y1) : (x2-x1);
+
+    if (width <= 2 && style == BorderStyle_Double)
+        style = BorderStyle_Solid;
+
+    switch (style) {
+    case BorderStyle_Inset:
+    case BorderStyle_Outset:
+        if ((style == BorderStyle_Outset && (edge == TopEdge || edge == LeftEdge))
+            || (style == BorderStyle_Inset && (edge == BottomEdge || edge == RightEdge)))
+            c = c.color().lighter();
+        // fall through!
+    case BorderStyle_Solid: {
+        p->setPen(Qt::NoPen);
+        p->setBrush(c);
+        if (width == 1 || (dw1 == 0 && dw2 == 0)) {
+            p->drawRect(QRectF(x1, y1, x2-x1, y2-y1));
+        } else { // draw trapezoid
+            QPolygonF quad;
+            switch (edge) {
+            case TopEdge:
+                quad << QPointF(x1, y1) << QPointF(x1 + dw1, y2)
+                     << QPointF(x2 - dw2, y2) << QPointF(x2, y1);
+                break;
+            case BottomEdge:
+                quad << QPointF(x1 + dw1, y1) << QPointF(x1, y2)
+                     << QPointF(x2, y2) << QPointF(x2 - dw2, y1);
+                break;
+            case LeftEdge:
+                quad << QPointF(x1, y1) << QPointF(x1, y2)
+                     << QPointF(x2, y2 - dw2) << QPointF(x2, y1 + dw1);
+                break;
+            case RightEdge:
+                quad << QPointF(x1, y1 + dw1) << QPointF(x1, y2 - dw2)
+                     << QPointF(x2, y2) << QPointF(x2, y1);
+                break;
+            default:
+                break;
+            }
+            p->drawConvexPolygon(quad);
+        }
+        break;
+    }
+    case BorderStyle_Dotted:
+    case BorderStyle_Dashed:
+    case BorderStyle_DotDash:
+    case BorderStyle_DotDotDash:
+        p->setPen(qPenFromStyle(c, width, style));
+        if (width == 1)
+            p->drawLine(QLineF(x1, y1, x2 - 1, y2 - 1));
+        else if (edge == TopEdge || edge == BottomEdge)
+            p->drawLine(QLineF(x1 + width/2, (y1 + y2)/2, x2 - width/2, (y1 + y2)/2));
+        else
+            p->drawLine(QLineF((x1+x2)/2, y1 + width/2, (x1+x2)/2, y2 - width/2));
+        break;
+
+    case BorderStyle_Double: {
+        int wby3 = qRound(width/3);
+        int dw1by3 = qRound(dw1/3);
+        int dw2by3 = qRound(dw2/3);
+        switch (edge) {
+        case TopEdge:
+            qDrawEdge(p, x1, y1, x2, y1 + wby3, dw1by3, dw2by3, TopEdge, BorderStyle_Solid, c);
+            qDrawEdge(p, x1 + dw1 - dw1by3, y2 - wby3, x2 - dw2 + dw1by3, y2,
+                      dw1by3, dw2by3, TopEdge, BorderStyle_Solid, c);
+            break;
+        case LeftEdge:
+            qDrawEdge(p, x1, y1, x1 + wby3, y2, dw1by3, dw2by3, LeftEdge, BorderStyle_Solid, c);
+            qDrawEdge(p, x2 - wby3, y1 + dw1 - dw1by3, x2, y2 - dw2 + dw2by3, dw1by3, dw2by3,
+                      LeftEdge, BorderStyle_Solid, c);
+            break;
+        case BottomEdge:
+            qDrawEdge(p, x1 + dw1 - dw1by3, y1, x2 - dw2 + dw2by3, y1 + wby3, dw1by3, dw2by3,
+                      BottomEdge, BorderStyle_Solid, c);
+            qDrawEdge(p, x1, y2 - wby3, x2, y2, dw1by3, dw2by3, BottomEdge, BorderStyle_Solid, c);
+            break;
+        case RightEdge:
+            qDrawEdge(p, x2 - wby3, y1, x2, y2, dw1by3, dw2by3, RightEdge, BorderStyle_Solid, c);
+            qDrawEdge(p, x1, y1 + dw1 - dw1by3, x1 + wby3, y2 - dw2 + dw2by3, dw1by3, dw2by3,
+                      RightEdge, BorderStyle_Solid, c);
+            break;
+        default:
+            break;
+        }
+        break;
+    }
+    case BorderStyle_Ridge:
+    case BorderStyle_Groove: {
+        BorderStyle s1, s2;
+        if (style == BorderStyle_Groove) {
+            s1 = BorderStyle_Inset;
+            s2 = BorderStyle_Outset;
+        } else {
+            s1 = BorderStyle_Outset;
+            s2 = BorderStyle_Inset;
+        }
+        int dw1by2 = qFloor(dw1/2), dw2by2 = qFloor(dw2/2);
+        int wby2 = qRound(width/2);
+        switch (edge) {
+        case TopEdge:
+            qDrawEdge(p, x1, y1, x2, y1 + wby2, dw1by2, dw2by2, TopEdge, s1, c);
+            qDrawEdge(p, x1 + dw1by2, y1 + wby2, x2 - dw2by2, y2, dw1by2, dw2by2, TopEdge, s2, c);
+            break;
+        case BottomEdge:
+            qDrawEdge(p, x1, y1 + wby2, x2, y2, dw1by2, dw2by2, BottomEdge, s1, c);
+            qDrawEdge(p, x1 + dw1by2, y1, x2 - dw2by2, y1 + wby2, dw1by2, dw2by2, BottomEdge, s2, c);
+            break;
+        case LeftEdge:
+            qDrawEdge(p, x1, y1, x1 + wby2, y2, dw1by2, dw2by2, LeftEdge, s1, c);
+            qDrawEdge(p, x1 + wby2, y1 + dw1by2, x2, y2 - dw2by2, dw1by2, dw2by2, LeftEdge, s2, c);
+            break;
+        case RightEdge:
+            qDrawEdge(p, x1 + wby2, y1, x2, y2, dw1by2, dw2by2, RightEdge, s1, c);
+            qDrawEdge(p, x1, y1 + dw1by2, x1 + wby2, y2 - dw2by2, dw1by2, dw2by2, RightEdge, s2, c);
+            break;
+        default:
+            break;
+        }
+    }
+    default:
+        break;
+    }
+    p->restore();
+}
+
+void qNormalizeRadii(const QRect &br, const QSize *radii,
+                     QSize *tlr, QSize *trr, QSize *blr, QSize *brr)
+{
+    *tlr = radii[0].expandedTo(QSize(0, 0));
+    *trr = radii[1].expandedTo(QSize(0, 0));
+    *blr = radii[2].expandedTo(QSize(0, 0));
+    *brr = radii[3].expandedTo(QSize(0, 0));
+    if (tlr->width() + trr->width() > br.width())
+        *tlr = *trr = QSize(0, 0);
+    if (blr->width() + brr->width() > br.width())
+        *blr = *brr = QSize(0, 0);
+    if (tlr->height() + blr->height() > br.height())
+        *tlr = *blr = QSize(0, 0);
+    if (trr->height() + brr->height() > br.height())
+        *trr = *brr = QSize(0, 0);
+}
+
+// Determines if Edge e1 draws over Edge e2. Depending on this trapezoids or rectanges are drawn
+static bool paintsOver(const QCss::BorderStyle *styles, const QBrush *colors, QCss::Edge e1, QCss::Edge e2)
+{
+    QCss::BorderStyle s1 = styles[e1];
+    QCss::BorderStyle s2 = styles[e2];
+
+    if (s2 == BorderStyle_None || colors[e2] == Qt::transparent)
+        return true;
+
+    if ((s1 == BorderStyle_Solid && s2 == BorderStyle_Solid) && (colors[e1] == colors[e2]))
+        return true;
+
+    return false;
+}
+
+void qDrawBorder(QPainter *p, const QRect &rect, const QCss::BorderStyle *styles,
+                 const int *borders, const QBrush *colors, const QSize *radii)
+{
+    const QRectF br(rect);
+    QSize tlr, trr, blr, brr;
+    qNormalizeRadii(rect, radii, &tlr, &trr, &blr, &brr);
+
+    // Drawn in increasing order of precendence
+    if (styles[BottomEdge] != BorderStyle_None && borders[BottomEdge] > 0) {
+        qreal dw1 = (blr.width() || paintsOver(styles, colors, BottomEdge, LeftEdge)) ? 0 : borders[LeftEdge];
+        qreal dw2 = (brr.width() || paintsOver(styles, colors, BottomEdge, RightEdge)) ? 0 : borders[RightEdge];
+        qreal x1 = br.x() + blr.width();
+        qreal y1 = br.y() + br.height() - borders[BottomEdge];
+        qreal x2 = br.x() + br.width() - brr.width();
+        qreal y2 = br.y() + br.height() ;
+
+        qDrawEdge(p, x1, y1, x2, y2, dw1, dw2, BottomEdge, styles[BottomEdge], colors[BottomEdge]);
+        if (blr.width() || brr.width())
+            qDrawRoundedCorners(p, x1, y1, x2, y2, blr, brr, BottomEdge, styles[BottomEdge], colors[BottomEdge]);
+    }
+    if (styles[RightEdge] != BorderStyle_None && borders[RightEdge] > 0) {
+        qreal dw1 = (trr.height() || paintsOver(styles, colors, RightEdge, TopEdge)) ? 0 : borders[TopEdge];
+        qreal dw2 = (brr.height() || paintsOver(styles, colors, RightEdge, BottomEdge)) ? 0 : borders[BottomEdge];
+        qreal x1 = br.x() + br.width() - borders[RightEdge];
+        qreal y1 = br.y() + trr.height();
+        qreal x2 = br.x() + br.width();
+        qreal y2 = br.y() + br.height() - brr.height();
+
+        qDrawEdge(p, x1, y1, x2, y2, dw1, dw2, RightEdge, styles[RightEdge], colors[RightEdge]);
+        if (trr.height() || brr.height())
+            qDrawRoundedCorners(p, x1, y1, x2, y2, trr, brr, RightEdge, styles[RightEdge], colors[RightEdge]);
+    }
+    if (styles[LeftEdge] != BorderStyle_None && borders[LeftEdge] > 0) {
+        qreal dw1 = (tlr.height() || paintsOver(styles, colors, LeftEdge, TopEdge)) ? 0 : borders[TopEdge];
+        qreal dw2 = (blr.height() || paintsOver(styles, colors, LeftEdge, BottomEdge)) ? 0 : borders[BottomEdge];
+        qreal x1 = br.x();
+        qreal y1 = br.y() + tlr.height();
+        qreal x2 = br.x() + borders[LeftEdge];
+        qreal y2 = br.y() + br.height() - blr.height();
+
+        qDrawEdge(p, x1, y1, x2, y2, dw1, dw2, LeftEdge, styles[LeftEdge], colors[LeftEdge]);
+        if (tlr.height() || blr.height())
+            qDrawRoundedCorners(p, x1, y1, x2, y2, tlr, blr, LeftEdge, styles[LeftEdge], colors[LeftEdge]);
+    }
+    if (styles[TopEdge] != BorderStyle_None && borders[TopEdge] > 0) {
+        qreal dw1 = (tlr.width() || paintsOver(styles, colors, TopEdge, LeftEdge)) ? 0 : borders[LeftEdge];
+        qreal dw2 = (trr.width() || paintsOver(styles, colors, TopEdge, RightEdge)) ? 0 : borders[RightEdge];
+        qreal x1 = br.x() + tlr.width();
+        qreal y1 = br.y();
+        qreal x2 = br.left() + br.width() - trr.width();
+        qreal y2 = br.y() + borders[TopEdge];
+
+        qDrawEdge(p, x1, y1, x2, y2, dw1, dw2, TopEdge, styles[TopEdge], colors[TopEdge]);
+        if (tlr.width() || trr.width())
+            qDrawRoundedCorners(p, x1, y1, x2, y2, tlr, trr, TopEdge, styles[TopEdge], colors[TopEdge]);
+    }
+}
+
+#endif //QT_NO_CSSPARSER
+
+QT_END_NAMESPACE