indexing: indexing paragraph text with the ModelTraverser

This adds the basic paragraph text export for indexing, which uses
the new ModelTraverser, which is inspired by AccessibilityCheck
(and in the future it will be changed to use the ModelTraverser
too, when it matures). ModelTraverser implements traversing through
the model and executes a handler for a element of a model (which
can be various things).

IndexingExport class implements indexing export that uses the
ModelTraverser to write into the indexing xml document, that uses
the tools::XmlWriter.

Change-Id: I7a6a5de332534270fe894a881131e5eb5ea9d881
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/117356
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

4 files changed, 191 insertions, 0 deletions

diff --git a/sw/source/core/inc/ModelTraverser.hxx b/sw/source/core/inc/ModelTraverser.hxx
new file mode 100644
index 000000000000..ab38032773df
--- /dev/null
+++ b/sw/source/core/inc/ModelTraverser.hxx
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#pragma once
+
+#include <doc.hxx>
+
+class SwNode;
+
+namespace sw
+{
+class SW_DLLPUBLIC ModelTraverseHandler
+{
+public:
+    virtual ~ModelTraverseHandler() {}
+
+    virtual void handleNode(SwNode* pNode) = 0;
+};
+
+class SW_DLLPUBLIC ModelTraverser
+{
+private:
+    std::vector<std::shared_ptr<ModelTraverseHandler>> mpNodeHandler;
+    SwDoc* m_pDoc;
+
+public:
+    ModelTraverser(SwDoc* pDoc)
+        : m_pDoc(pDoc)
+    {
+    }
+
+    void traverse();
+
+    void addNodeHandler(std::shared_ptr<ModelTraverseHandler> pHandler)
+    {
+        mpNodeHandler.push_back(pHandler);
+    }
+};
+
+} // end sw namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sw/source/core/model/ModelTraverser.cxx b/sw/source/core/model/ModelTraverser.cxx
new file mode 100644
index 000000000000..f46e173eca9f
--- /dev/null
+++ b/sw/source/core/model/ModelTraverser.cxx
@@ -0,0 +1,39 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#include <ModelTraverser.hxx>
+#include <node.hxx>
+#include <ndarr.hxx>
+
+namespace sw
+{
+void ModelTraverser::traverse()
+{
+    if (m_pDoc == nullptr)
+        return;
+
+    auto const& pNodes = m_pDoc->GetNodes();
+    SwNode* pNode = nullptr;
+    for (sal_uLong n = 0; n < pNodes.Count(); ++n)
+    {
+        pNode = pNodes[n];
+        if (pNode)
+        {
+            for (auto& pNodeHandler : mpNodeHandler)
+            {
+                pNodeHandler->handleNode(pNode);
+            }
+        }
+    }
+}
+
+} // end sw namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sw/source/filter/inc/IndexingExport.hxx b/sw/source/filter/inc/IndexingExport.hxx
new file mode 100644
index 000000000000..782ddf7f5f0f
--- /dev/null
+++ b/sw/source/filter/inc/IndexingExport.hxx
@@ -0,0 +1,32 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#pragma once
+
+#include <ModelTraverser.hxx>
+#include <tools/XmlWriter.hxx>
+
+namespace sw
+{
+class SW_DLLPUBLIC IndexingExport
+{
+private:
+    ModelTraverser m_aModelTraverser;
+    tools::XmlWriter m_aXmlWriter;
+
+public:
+    IndexingExport(SvStream& rStream, SwDoc* pDoc);
+
+    bool runExport();
+};
+
+} // end sw namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sw/source/filter/indexing/IndexingExport.cxx b/sw/source/filter/indexing/IndexingExport.cxx
new file mode 100644
index 000000000000..8df7d56f7ff6
--- /dev/null
+++ b/sw/source/filter/indexing/IndexingExport.cxx
@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#include <IndexingExport.hxx>
+
+#include <ndtxt.hxx>
+
+namespace sw
+{
+namespace
+{
+class IndexingNodeHandler : public ModelTraverseHandler
+{
+private:
+    tools::XmlWriter& m_rXmlWriter;
+
+public:
+    IndexingNodeHandler(tools::XmlWriter& rXmlWriter)
+        : m_rXmlWriter(rXmlWriter)
+    {
+    }
+
+    void handleNode(SwNode* pNode) override
+    {
+        if (!pNode->IsTextNode())
+            return;
+
+        SwTextNode* pTextNode = pNode->GetTextNode();
+        const OUString& rString
+            = pTextNode->GetText().replaceAll(OUStringChar(CH_TXTATR_BREAKWORD), "");
+        m_rXmlWriter.startElement("paragraph");
+        m_rXmlWriter.attribute("index", pTextNode->GetIndex());
+        m_rXmlWriter.content(rString);
+        m_rXmlWriter.endElement();
+    }
+};
+
+} // end anonymous namespace
+
+IndexingExport::IndexingExport(SvStream& rStream, SwDoc* pDoc)
+    : m_aModelTraverser(pDoc)
+    , m_aXmlWriter(&rStream)
+{
+}
+
+bool IndexingExport::runExport()
+{
+    bool bResult = m_aXmlWriter.startDocument(2);
+    if (!bResult)
+        return false;
+
+    m_aXmlWriter.startElement("indexing");
+    m_aModelTraverser.addNodeHandler(std::make_shared<IndexingNodeHandler>(m_aXmlWriter));
+    m_aModelTraverser.traverse();
+    m_aXmlWriter.endElement();
+
+    m_aXmlWriter.endDocument();
+
+    return true;
+}
+
+} // end sw namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */