新增网络中转服务器+designer源码项目

designer/lib/shared/qdesigner_widgetbox.cpp

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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Designer of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial Usage
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qdesigner_widgetbox_p.h"
+#include "qdesigner_utils_p.h"
+
+#include <ui4_p.h>
+
+#include <QtCore/QRegExp>
+#include <QtCore/QDebug>
+#include <QtCore/QXmlStreamReader>
+
+QT_BEGIN_NAMESPACE
+
+namespace qdesigner_internal {
+QDesignerWidgetBox::QDesignerWidgetBox(QWidget *parent, Qt::WindowFlags flags)
+    : QDesignerWidgetBoxInterface(parent, flags),
+      m_loadMode(LoadMerge)
+{
+
+}
+
+QDesignerWidgetBox::LoadMode QDesignerWidgetBox::loadMode() const
+{
+    return m_loadMode;
+}
+
+void QDesignerWidgetBox::setLoadMode(LoadMode lm)
+{
+     m_loadMode = lm;
+}
+
+// Convenience to find a widget by class name
+bool QDesignerWidgetBox::findWidget(const QDesignerWidgetBoxInterface *wbox,
+                                    const QString &className,
+                                    const QString &category,
+                                    Widget *widgetData)
+{
+    // Note that entry names do not necessarily match the class name
+    // (at least, not for the standard widgets), so,
+    // look in the XML for the class name of the first widget to appear
+    const QString widgetTag = QLatin1String("<widget");
+    QString pattern = QLatin1String("^<widget\\s+class\\s*=\\s*\"");
+    pattern += className;
+    pattern += QLatin1String("\".*$");
+    const QRegExp regexp(pattern);
+    Q_ASSERT(regexp.isValid());
+    const int catCount = wbox->categoryCount();
+    for (int c = 0; c < catCount; c++) {
+        const Category cat = wbox->category(c);
+        if (category.isEmpty() || cat.name() == category) {
+            const int widgetCount =  cat.widgetCount();
+            for (int w = 0; w < widgetCount; w++) {
+                const Widget widget = cat.widget(w);
+                QString xml = widget.domXml(); // Erase the <ui> tag that can be present starting from 4.4
+                const int widgetTagIndex = xml.indexOf(widgetTag);
+                if (widgetTagIndex != -1) {
+                    xml.remove(0, widgetTagIndex);
+                    if (regexp.exactMatch(xml)) {
+                        *widgetData = widget;
+                        return true;
+                    }
+                }
+            }
+        }
+    }
+    return false;
+}
+
+// Convenience to create a Dom Widget from widget box xml code.
+DomUI *QDesignerWidgetBox::xmlToUi(const QString &name, const QString &xml, bool insertFakeTopLevel,
+                                   QString *errorMessage)
+{
+    QXmlStreamReader reader(xml);
+    DomUI *ui = 0;
+
+    // The xml description must either contain a root element "ui" with a child element "widget"
+    // or "widget" as the root element (4.3 legacy)
+    const QString widgetTag = QLatin1String("widget");
+
+    while (!reader.atEnd()) {
+        if (reader.readNext() == QXmlStreamReader::StartElement) {
+            const QStringRef name = reader.name();
+            if (ui) {
+                reader.raiseError(tr("Unexpected element <%1>").arg(name.toString()));
+                continue;
+            }
+
+            if (name.compare(QLatin1String("widget"), Qt::CaseInsensitive) == 0) { // 4.3 legacy, wrap into DomUI
+                ui = new DomUI;
+                DomWidget *widget = new DomWidget;
+                widget->read(reader);
+                ui->setElementWidget(widget);
+            } else if (name.compare(QLatin1String("ui"), Qt::CaseInsensitive) == 0) { // 4.4
+                ui = new DomUI;
+                ui->read(reader);
+            } else {
+                reader.raiseError(tr("Unexpected element <%1>").arg(name.toString()));
+            }
+        }
+   }
+
+    if (reader.hasError()) {
+        delete ui;
+        *errorMessage = tr("A parse error occurred at line %1, column %2 of the XML code "
+                           "specified for the widget %3: %4\n%5")
+                           .arg(reader.lineNumber()).arg(reader.columnNumber()).arg(name)
+                           .arg(reader.errorString()).arg(xml);
+        return 0;
+    }
+
+    if (!ui || !ui->elementWidget()) {
+        delete ui;
+        *errorMessage = tr("The XML code specified for the widget %1 does not contain "
+                           "any widget elements.\n%2").arg(name).arg(xml);
+        return 0;
+    }
+
+    if (insertFakeTopLevel)  {
+        DomWidget *fakeTopLevel = new DomWidget;
+        fakeTopLevel->setAttributeClass(QLatin1String("QWidget"));
+        QList<DomWidget *> children;
+        children.push_back(ui->takeElementWidget());
+        fakeTopLevel->setElementWidget(children);
+        ui->setElementWidget(fakeTopLevel);
+    }
+
+    return ui;
+}
+
+// Convenience to create a Dom Widget from widget box xml code.
+DomUI *QDesignerWidgetBox::xmlToUi(const QString &name, const QString &xml, bool insertFakeTopLevel)
+{
+    QString errorMessage;
+    DomUI *rc = xmlToUi(name, xml, insertFakeTopLevel, &errorMessage);
+    if (!rc)
+        qdesigner_internal::designerWarning(errorMessage);
+    return rc;
+}
+
+}  // namespace qdesigner_internal
+
+QT_END_NAMESPACE