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330
src/plugins/designer/formtemplatewizardpage.cpp
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330
src/plugins/designer/formtemplatewizardpage.cpp
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/***************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Qt Software Information (qt-info@nokia.com)
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**
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**
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** Non-Open Source Usage
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**
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** Licensees may use this file in accordance with the Qt Beta Version
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** License Agreement, Agreement version 2.2 provided with the Software or,
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** alternatively, in accordance with the terms contained in a written
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** agreement between you and Nokia.
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**
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** GNU General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the packaging
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** of this file. Please review the following information to ensure GNU
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** General Public Licensing requirements will be met:
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**
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** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt GPL Exception version
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** 1.2, included in the file GPL_EXCEPTION.txt in this package.
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**
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***************************************************************************/
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#include "formtemplatewizardpage.h"
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#include "formeditorw.h"
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#include <QtDesigner/private/abstractnewformwidget_p.h>
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#include <QtCore/QDebug>
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#include <QtCore/QXmlStreamReader>
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#include <QtCore/QXmlStreamAttributes>
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#include <QtCore/QByteArray>
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#include <QtCore/QBuffer>
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#include <QtGui/QVBoxLayout>
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#include <QtGui/QMessageBox>
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#include <QtGui/QAbstractButton>
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#ifdef USE_XSLT
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# include <QtXmlPatterns/QXmlQuery>
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#else
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# include <QtXml/QDomDocument>
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#endif
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namespace Designer {
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namespace Internal {
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// ----------------- FormTemplateWizardPagePage
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FormTemplateWizardPagePage::FormTemplateWizardPagePage(QWidget * parent) :
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QWizardPage(parent),
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m_newFormWidget(QDesignerNewFormWidgetInterface::createNewFormWidget(FormEditorW::instance()->designerEditor())),
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m_templateSelected(m_newFormWidget->hasCurrentTemplate())
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{
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setTitle(tr("Choose a form template"));
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QVBoxLayout *layout = new QVBoxLayout;
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connect(m_newFormWidget, SIGNAL(currentTemplateChanged(bool)),
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this, SLOT(slotCurrentTemplateChanged(bool)));
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connect(m_newFormWidget, SIGNAL(templateActivated()),
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this, SIGNAL(templateActivated()));
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layout->addWidget(m_newFormWidget);
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setLayout(layout);
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}
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bool FormTemplateWizardPagePage::isComplete() const
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{
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return m_templateSelected;
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}
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void FormTemplateWizardPagePage::slotCurrentTemplateChanged(bool templateSelected)
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{
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if (m_templateSelected == templateSelected)
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return;
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m_templateSelected = templateSelected;
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emit completeChanged();
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}
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bool FormTemplateWizardPagePage::validatePage()
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{
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QString errorMessage;
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m_templateContents = m_newFormWidget->currentTemplate(&errorMessage);
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if (m_templateContents.isEmpty()) {
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QMessageBox::critical(this, tr("%1 - Error").arg(title()), errorMessage);
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return false;
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}
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return true;
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}
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QString FormTemplateWizardPagePage::stripNamespaces(const QString &className)
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{
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QString rc = className;
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const int namespaceIndex = rc.lastIndexOf(QLatin1String("::"));
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if (namespaceIndex != -1)
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rc.remove(0, namespaceIndex + 2);
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return rc;
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}
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bool FormTemplateWizardPagePage::getUIXmlData(const QString &uiXml,
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QString *formBaseClass,
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QString *uiClassName)
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{
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// Parse UI xml to determine
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// 1) The ui class name from "<class>Designer::Internal::FormClassWizardPage</class>"
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// 2) the base class from: widget class="QWizardPage"...
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QXmlStreamReader reader(uiXml);
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while (!reader.atEnd()) {
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if (reader.readNext() == QXmlStreamReader::StartElement) {
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if (reader.name() == QLatin1String("class")) {
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*uiClassName = reader.readElementText();
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} else {
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if (reader.name() == QLatin1String("widget")) {
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const QXmlStreamAttributes attrs = reader.attributes();
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*formBaseClass = reader.attributes().value(QLatin1String("class")).toString();
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return !uiClassName->isEmpty() && !formBaseClass->isEmpty();
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}
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}
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}
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}
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return false;
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}
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#ifdef USE_XSLT
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// Change the UI class name in UI xml: This occurs several times, as contents
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// of the <class> element, as name of the first <widget> element, and possibly
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// in the signal/slot connections
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static const char *classNameChangingSheetFormatC =
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"<?xml version=\"1.0\"?>\n"
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"<xsl:stylesheet xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\" version=\"2.0\">\n"
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"<xsl:output method=\"xml\" indent=\"yes\" encoding=\"UTF-8\" />\n"
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"\n"
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"<!-- Grab old class name to be replaced by evaluating <ui><class> -->\n"
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"<xsl:param name=\"oldClassName\"><xsl:value-of select=\"/ui/class\"/></xsl:param>\n"
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"\n"
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"<!-- heavy wizardry to copy nodes and attributes (emulating the default rules) -->\n"
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"<xsl:template match=\"@*|node()\">\n"
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" <xsl:copy>\n"
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" <xsl:apply-templates select=\"@*|node()\"/>\n"
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" </xsl:copy>\n"
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"</xsl:template>\n"
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"\n"
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"<!-- Change <ui><class> tag -->\n"
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"<xsl:template match=\"class\">\n"
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" <xsl:element name=\"class\">\n"
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" <xsl:text>%1</xsl:text>\n"
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" </xsl:element>\n"
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"</xsl:template>\n"
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"\n"
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"<!-- Change first <widget> tag -->\n"
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"<xsl:template match=\"/ui/widget/@name\">\n"
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"<xsl:attribute name=\"name\">\n"
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"<xsl:text>%1</xsl:text>\n"
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"</xsl:attribute>\n"
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"</xsl:template>\n"
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"\n"
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"<!-- Change <sender>/<receiver> elements (for pre-wired QDialog signals) -->\n"
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"<xsl:template match=\"receiver[.='Dialog']\">\n"
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" <xsl:element name=\"receiver\">\n"
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" <xsl:text>%1</xsl:text>\n"
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" </xsl:element>\n"
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"</xsl:template>\n"
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"<xsl:template match=\"sender[.='Dialog']\">\n"
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" <xsl:element name=\"sender\">\n"
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" <xsl:text>%1</xsl:text>\n"
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" </xsl:element>\n"
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"</xsl:template>\n"
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"</xsl:stylesheet>\n";
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QString FormTemplateWizardPagePage::changeUiClassName(const QString &uiXml, const QString &newUiClassName)
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{
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// Prepare I/O: Sheet
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const QString xsltSheet = QString::fromLatin1(classNameChangingSheetFormatC).arg(newUiClassName);
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QByteArray xsltSheetBA = xsltSheet.toUtf8();
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QBuffer xsltSheetBuffer(&xsltSheetBA);
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xsltSheetBuffer.open(QIODevice::ReadOnly);
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// Prepare I/O: Xml
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QByteArray xmlBA = uiXml.toUtf8();
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QBuffer xmlBuffer(&xmlBA);
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xmlBuffer.open(QIODevice::ReadOnly);
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// Prepare I/O: output
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QBuffer outputBuffer;
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outputBuffer.open(QIODevice::WriteOnly);
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// Run query
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QXmlQuery query(QXmlQuery::XSLT20);
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query.setFocus(&xmlBuffer);
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query.setQuery(&xsltSheetBuffer);
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if (!query.evaluateTo(&outputBuffer)) {
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qWarning("Unable to change the ui class name in a form template.\n%s\nUsing:\n%s\n",
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xmlBA.constData(), xsltSheetBA.constData());
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return uiXml;
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}
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outputBuffer.close();
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return QString::fromUtf8(outputBuffer.data());
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}
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#else
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// Change the contents of a DOM element to a new value if it matches
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// a predicate
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template <class Predicate>
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bool changeDomElementContents(const QDomElement &element,
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Predicate p,
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const QString &newValue,
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QString *ptrToOldValue = 0)
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{
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// Find text in "<element>text</element>"
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const QDomNodeList children = element.childNodes();
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if (children.size() != 1)
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return false;
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const QDomNode first = children.at(0);
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if (first.nodeType() != QDomNode::TextNode)
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return false;
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QDomCharacterData data = first.toCharacterData();
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const QString oldValue = data.data();
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if (p(oldValue)) {
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if (ptrToOldValue)
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*ptrToOldValue = oldValue;
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data.setData(newValue);
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return true;
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}
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return false;
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}
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namespace {
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bool truePredicate(const QString &) { return true; }
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// Predicate that matches a string value
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class MatchPredicate {
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public:
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MatchPredicate(const QString &m) : m_match(m) {}
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bool operator()(const QString &s) const { return s == m_match; }
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private:
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const QString m_match;
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};
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// Change <sender> and <receiver> in a Dom UI <connections> list
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// if they match the class name passed on
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void changeDomConnectionList(const QDomElement &connectionsNode,
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const QString &oldClassName,
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const QString &newClassName)
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{
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const MatchPredicate oldClassPredicate(oldClassName);
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const QString senderTag = QLatin1String("sender");
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const QString receiverTag = QLatin1String("receiver");
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const QDomNodeList connections = connectionsNode.childNodes();
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const int connectionsCount = connections.size();
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// Loop <connection>
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for (int c = 0; c < connectionsCount; c++) {
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const QDomNodeList connectionElements = connections.at(c).childNodes();
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const int connectionElementCount = connectionElements.count();
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// Loop <sender>, <receiver>, <signal>, <slot>
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for (int ce = 0; ce < connectionElementCount; ce++) {
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const QDomNode connectionElementNode = connectionElements.at(ce);
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if (connectionElementNode.isElement()) {
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const QDomElement connectionElement = connectionElementNode.toElement();
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const QString tagName = connectionElement.tagName();
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if (tagName == senderTag || tagName == receiverTag)
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changeDomElementContents(connectionElement, oldClassPredicate, newClassName);
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}
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}
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}
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}
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}
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// Change the UI class name in UI xml: This occurs several times, as contents
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// of the <class> element, as name of the first <widget> element, and possibly
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// in the signal/slot connections
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QString FormTemplateWizardPagePage::changeUiClassName(const QString &uiXml, const QString &newUiClassName)
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{
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QDomDocument domUi;
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if (!domUi.setContent(uiXml)) {
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qWarning("Failed to parse:\n%s", uiXml.toUtf8().constData());
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return uiXml;
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}
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bool firstWidgetElementFound = false;
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QString oldClassName;
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// Loop first level children. First child is <ui>
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const QDomNodeList children = domUi.firstChildElement().childNodes();
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const QString classTag = QLatin1String("class");
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const QString widgetTag = QLatin1String("widget");
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const QString connectionsTag = QLatin1String("connections");
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const int count = children.size();
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for (int i = 0; i < count; i++) {
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const QDomNode node = children.at(i);
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if (node.isElement()) {
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// Replace <class> element text
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QDomElement element = node.toElement();
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const QString name = element.tagName();
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if (name == classTag) {
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if (!changeDomElementContents(element, truePredicate, newUiClassName, &oldClassName)) {
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qWarning("Unable to change the <class> element:\n%s", uiXml.toUtf8().constData());
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return uiXml;
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}
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} else {
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// Replace first <widget> element name attribute
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if (!firstWidgetElementFound && name == widgetTag) {
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firstWidgetElementFound = true;
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const QString nameAttribute = QLatin1String("name");
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if (element.hasAttribute(nameAttribute))
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element.setAttribute(nameAttribute, newUiClassName);
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} else {
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// Replace <sender>, <receiver> tags of dialogs.
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if (name == connectionsTag)
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changeDomConnectionList(element, oldClassName, newUiClassName);
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}
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}
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}
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}
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const QString rc = domUi.toString();
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return rc;
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}
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#endif
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} // namespace Internal
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} // namespace Designer
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