Long live Qt 4.5!

1 files changed, 154 insertions, 0 deletions

diff --git a/doc/src/snippets/textdocument-tables/xmlwriter.cpp b/doc/src/snippets/textdocument-tables/xmlwriter.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the documentation 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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 are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "xmlwriter.h"
+
+QDomDocument *XmlWriter::toXml()
+{
+    QDomImplementation implementation;
+    QDomDocumentType docType = implementation.createDocumentType(
+        "scribe-document", "scribe", "qtsoftware.com/scribe");
+
+    document = new QDomDocument(docType);
+
+    // ### This processing instruction is required to ensure that any kind
+    // of encoding is given when the document is written.
+    QDomProcessingInstruction process = document->createProcessingInstruction(
+        "xml", "version=\"1.0\" encoding=\"utf-8\"");
+    document->appendChild(process);
+
+    QDomElement documentElement = document->createElement("document");
+    document->appendChild(documentElement);
+
+    QTextFrame *root = textDocument->rootFrame();
+    
+    if (root)
+        processFrame(documentElement, root);
+
+    return document;
+}
+
+void XmlWriter::processBlock(QDomElement &parent, const QTextBlock &block)
+{
+    QDomElement blockElement = document->createElement("block");
+    blockElement.setAttribute("position", block.position());
+    blockElement.setAttribute("length", block.length());
+    parent.appendChild(blockElement);
+
+    QTextBlock::iterator it;
+    for (it = block.begin(); !(it.atEnd()); ++it) {
+        QTextFragment fragment = it.fragment();
+
+        if (fragment.isValid()) {
+            QDomElement fragmentElement = document->createElement("fragment");
+            blockElement.appendChild(fragmentElement);
+
+            fragmentElement.setAttribute("length", fragment.length());
+            QDomText fragmentText = document->createTextNode(fragment.text());
+
+            fragmentElement.appendChild(fragmentText);
+        }
+    }
+}
+
+void XmlWriter::processFrame(QDomElement &parent, QTextFrame *frame)
+{
+    QDomElement frameElement = document->createElement("frame");
+    frameElement.setAttribute("begin", frame->firstPosition());
+    frameElement.setAttribute("end", frame->lastPosition());
+    parent.appendChild(frameElement);
+
+//! [0]
+    QTextFrame::iterator it;
+    for (it = frame->begin(); !(it.atEnd()); ++it) {
+
+        QTextFrame *childFrame = it.currentFrame();
+        QTextBlock childBlock = it.currentBlock();
+
+        if (childFrame) {
+            QTextTable *childTable = qobject_cast<QTextTable*>(childFrame);
+
+            if (childTable)
+                processTable(frameElement, childTable);
+            else
+                processFrame(frameElement, childFrame);
+
+        } else if (childBlock.isValid())
+//! [0] //! [1]
+            processBlock(frameElement, childBlock);
+    }
+//! [1]
+}
+
+void XmlWriter::processTable(QDomElement &parent, QTextTable *table)
+{
+    QDomElement element = document->createElement("table");
+
+    for (int row = 0; row < table->rows(); ++row) {
+        for (int column = 0; column < table->columns(); ++column) {
+            QTextTableCell cell = table->cellAt(row, column);
+            processTableCell(element, cell);
+        }
+    }
+    parent.appendChild(element);
+}
+
+void XmlWriter::processTableCell(QDomElement &parent, const QTextTableCell &cell)
+{
+    QDomElement element = document->createElement("cell");
+    element.setAttribute("row", cell.row());
+    element.setAttribute("column", cell.column());
+    
+    QTextFrame::iterator it;
+    for (it = cell.begin(); !(it.atEnd()); ++it) {
+
+        QTextFrame *childFrame = it.currentFrame();
+        QTextBlock childBlock = it.currentBlock();
+
+        if (childFrame)
+            processFrame(element, childFrame);
+        else if (childBlock.isValid())
+            processBlock(element, childBlock);
+    }
+    parent.appendChild(element);
+}