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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the Qt Designer of the Qt Toolkit.

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     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

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    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

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    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

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    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include "qdesigner_widgetbox_p.h"

    43 #include "qdesigner_utils_p.h"

    44 

    45 #include <ui4_p.h>

    46 

    47 #include <QtCore/QRegExp>

    48 #include <QtCore/QDebug>

    49 #include <QtCore/QXmlStreamReader>

    50 

    51 QT_BEGIN_NAMESPACE

    52 

    53 namespace qdesigner_internal {

    54 QDesignerWidgetBox::QDesignerWidgetBox(QWidget *parent, Qt::WindowFlags flags)

    55     : QDesignerWidgetBoxInterface(parent, flags),

    56       m_loadMode(LoadMerge)

    57 {

    58 

    59 }

    60 

    61 QDesignerWidgetBox::LoadMode QDesignerWidgetBox::loadMode() const

    62 {

    63     return m_loadMode;

    64 }

    65 

    66 void QDesignerWidgetBox::setLoadMode(LoadMode lm)

    67 {

    68      m_loadMode = lm;

    69 }

    70 

    71 // Convenience to find a widget by class name

    72 bool QDesignerWidgetBox::findWidget(const QDesignerWidgetBoxInterface *wbox,

    73                                     const QString &className,

    74                                     const QString &category,

    75                                     Widget *widgetData)

    76 {

    77     // Note that entry names do not necessarily match the class name

    78     // (at least, not for the standard widgets), so,

    79     // look in the XML for the class name of the first widget to appear

    80     const QString widgetTag = QLatin1String("<widget");

    81     QString pattern = QLatin1String("^<widget\\s+class\\s*=\\s*\"");

    82     pattern += className;

    83     pattern += QLatin1String("\".*$");

    84     const QRegExp regexp(pattern);

    85     Q_ASSERT(regexp.isValid());

    86     const int catCount = wbox->categoryCount();

    87     for (int c = 0; c < catCount; c++) {

    88         const Category cat = wbox->category(c);

    89         if (category.isEmpty() || cat.name() == category) {

    90             const int widgetCount =  cat.widgetCount();

    91             for (int w = 0; w < widgetCount; w++) {

    92                 const Widget widget = cat.widget(w);

    93                 QString xml = widget.domXml(); // Erase the <ui> tag that can be present starting from 4.4

    94                 const int widgetTagIndex = xml.indexOf(widgetTag);

    95                 if (widgetTagIndex != -1) {

    96                     xml.remove(0, widgetTagIndex);

    97                     if (regexp.exactMatch(xml)) {

    98                         *widgetData = widget;

    99                         return true;

   100                     }

   101                 }

   102             }

   103         }

   104     }

   105     return false;

   106 }

   107 

   108 // Convenience to create a Dom Widget from widget box xml code.

   109 DomUI *QDesignerWidgetBox::xmlToUi(const QString &name, const QString &xml, bool insertFakeTopLevel,

   110                                    QString *errorMessage)

   111 {

   112     QXmlStreamReader reader(xml);

   113     DomUI *ui = 0;

   114 

   115     // The xml description must either contain a root element "ui" with a child element "widget"

   116     // or "widget" as the root element (4.3 legacy)

   117     const QString widgetTag = QLatin1String("widget");

   118 

   119     while (!reader.atEnd()) {

   120         if (reader.readNext() == QXmlStreamReader::StartElement) {

   121             const QStringRef name = reader.name();

   122             if (ui) {

   123                 reader.raiseError(tr("Unexpected element <%1>").arg(name.toString()));

   124                 continue;

   125             }

   126 

   127             if (name.compare(QLatin1String("widget"), Qt::CaseInsensitive) == 0) { // 4.3 legacy, wrap into DomUI

   128                 ui = new DomUI;

   129                 DomWidget *widget = new DomWidget;

   130                 widget->read(reader);

   131                 ui->setElementWidget(widget);

   132             } else if (name.compare(QLatin1String("ui"), Qt::CaseInsensitive) == 0) { // 4.4

   133                 ui = new DomUI;

   134                 ui->read(reader);

   135             } else {

   136                 reader.raiseError(tr("Unexpected element <%1>").arg(name.toString()));

   137             }

   138         }

   139    }

   140 

   141     if (reader.hasError()) {

   142         delete ui;

   143         *errorMessage = tr("A parse error occurred at line %1, column %2 of the XML code "

   144                            "specified for the widget %3: %4\n%5")

   145                            .arg(reader.lineNumber()).arg(reader.columnNumber()).arg(name)

   146                            .arg(reader.errorString()).arg(xml);

   147         return 0;

   148     }

   149 

   150     if (!ui || !ui->elementWidget()) {

   151         delete ui;

   152         *errorMessage = tr("The XML code specified for the widget %1 does not contain "

   153                            "any widget elements.\n%2").arg(name).arg(xml);

   154         return 0;

   155     }

   156 

   157     if (insertFakeTopLevel)  {

   158         DomWidget *fakeTopLevel = new DomWidget;

   159         fakeTopLevel->setAttributeClass(QLatin1String("QWidget"));

   160         QList<DomWidget *> children;

   161         children.push_back(ui->takeElementWidget());

   162         fakeTopLevel->setElementWidget(children);

   163         ui->setElementWidget(fakeTopLevel);

   164     }

   165 

   166     return ui;

   167 }

   168 

   169 // Convenience to create a Dom Widget from widget box xml code.

   170 DomUI *QDesignerWidgetBox::xmlToUi(const QString &name, const QString &xml, bool insertFakeTopLevel)

   171 {

   172     QString errorMessage;

   173     DomUI *rc = xmlToUi(name, xml, insertFakeTopLevel, &errorMessage);

   174     if (!rc)

   175         qdesigner_internal::designerWarning(errorMessage);

   176     return rc;

   177 }

   178 

   179 }  // namespace qdesigner_internal

   180 

   181 QT_END_NAMESPACE