tdf#160386: Add support for switch element

For now, only use language tag, meaning if
there is a file like in the unittest with

<text systemLanguage="en-us">Howdy!</text>
<text systemLanguage="en-gb">Wotcha!</text>
<text systemLanguage="en-au">G'day!</text>
<text systemLanguage="en">Hello!</text>

"Hello!" with be displayed in a en_AU system locale

This patch partially reverts 13a41e7a12598c7896d6dc8d34aba6af5b80b83c
"tdf#150124: do nothing when parent is of unkown type"
making 0dfd8288a87b58e503bb3a41be6137485fbf3f68
"ofz#60384 Direct-leak" no longer necessary

Change-Id: Ifc73bc69aa997088dc0a2b11d7d30446303fa3b3

Change-Id: I885ef0f2c44b86196881fe55a963db2e5c7eb1be
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/165394
Tested-by: Jenkins
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>

4 files changed, 176 insertions, 7 deletions

diff --git a/svgio/source/svgreader/svgdocumenthandler.cxx b/svgio/source/svgreader/svgdocumenthandler.cxx
index 6e31aaf8fdf0..85a54448e7d9 100644
--- a/svgio/source/svgreader/svgdocumenthandler.cxx
+++ b/svgio/source/svgreader/svgdocumenthandler.cxx
@@ -27,6 +27,7 @@
 #include <svgrectnode.hxx>
 #include <svggradientnode.hxx>
 #include <svggradientstopnode.hxx>
+#include <svgswitchnode.hxx>
 #include <svgsymbolnode.hxx>
 #include <svgusenode.hxx>
 #include <svgcirclenode.hxx>
@@ -203,7 +204,13 @@ namespace
                     mpTarget->parseAttributes(xAttribs);
                     break;
                 }
-                case SVGToken::Switch: //TODO: Support switch element
+                case SVGToken::Switch:
+                {
+                    /// new node for Switch
+                    mpTarget = new SvgSwitchNode(maDocument, mpTarget);
+                    mpTarget->parseAttributes(xAttribs);
+                    break;
+                }
                 case SVGToken::Defs:
                 case SVGToken::G:
                 {
diff --git a/svgio/source/svgreader/svgnode.cxx b/svgio/source/svgreader/svgnode.cxx
index c372184b1e37..20a48de25977 100644
--- a/svgio/source/svgreader/svgnode.cxx
+++ b/svgio/source/svgreader/svgnode.cxx
@@ -367,17 +367,13 @@ namespace {
             mpParent(pParent),
             mpAlternativeParent(nullptr),
             maXmlSpace(XmlSpace::NotSet),
-            maDisplay(Display::Inline),
+            maDisplay(maType == SVGToken::Unknown ? Display::None : Display::Inline), // tdf#150124: do not display unknown nodes
             mbDecomposing(false),
             mbCssStyleVectorBuilt(false)
         {
             if (pParent)
             {
-                // tdf#150124 ignore when parent is unknown
-                if (pParent->getType() != SVGToken::Unknown)
-                    pParent->maChildren.emplace_back(this);
-                else
-                    mrDocument.addOrphanNode(this);
+                pParent->maChildren.emplace_back(this);
             }
         }
 
@@ -527,6 +523,14 @@ namespace {
                     }
                     break;
                 }
+                case SVGToken::SystemLanguage:
+                {
+                    if(!aContent.isEmpty())
+                    {
+                        setSystemLanguage(aContent);
+                    }
+                    break;
+                }
                 case SVGToken::XmlSpace:
                 {
                     if(!aContent.isEmpty())
@@ -751,6 +755,34 @@ namespace {
             mrDocument.addSvgNodeToMapper(*mpClass, *this);
         }
 
+        void SvgNode::setSystemLanguage(OUString const & rSystemClass)
+        {
+            const sal_Int32 nLen(rSystemClass.getLength());
+            sal_Int32 nPos(0);
+            OUStringBuffer aToken;
+
+            // split into single tokens (currently only comma separator)
+            while(nPos < nLen)
+            {
+                const sal_Int32 nInitPos(nPos);
+                copyToLimiter(rSystemClass, u',', nPos, aToken, nLen);
+                skip_char(rSystemClass, u',', nPos, nLen);
+                const OUString aLang(o3tl::trim(aToken));
+                aToken.setLength(0);
+
+                if(!aLang.isEmpty())
+                {
+                    maSystemLanguage.push_back(aLang);
+                }
+
+                if(nInitPos == nPos)
+                {
+                    OSL_ENSURE(false, "Could not interpret on current position (!)");
+                    nPos++;
+                }
+            }
+        }
+
         XmlSpace SvgNode::getXmlSpace() const
         {
             if(maXmlSpace != XmlSpace::NotSet)
diff --git a/svgio/source/svgreader/svgswitchnode.cxx b/svgio/source/svgreader/svgswitchnode.cxx
new file mode 100644
index 000000000000..bbad79a3b5d9
--- /dev/null
+++ b/svgio/source/svgreader/svgswitchnode.cxx
@@ -0,0 +1,129 @@
+/* -*- 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <svgswitchnode.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <drawinglayer/primitive2d/transformprimitive2d.hxx>
+#include <unotools/syslocaleoptions.hxx>
+
+namespace svgio::svgreader
+{
+SvgSwitchNode::SvgSwitchNode(SvgDocument& rDocument, SvgNode* pParent)
+    : SvgNode(SVGToken::Switch, rDocument, pParent)
+    , maSvgStyleAttributes(*this)
+{
+}
+
+SvgSwitchNode::~SvgSwitchNode() {}
+
+const SvgStyleAttributes* SvgSwitchNode::getSvgStyleAttributes() const
+{
+    return checkForCssStyle(maSvgStyleAttributes);
+}
+
+void SvgSwitchNode::parseAttribute(SVGToken aSVGToken, const OUString& aContent)
+{
+    // call parent
+    SvgNode::parseAttribute(aSVGToken, aContent);
+
+    // read style attributes
+    maSvgStyleAttributes.parseStyleAttribute(aSVGToken, aContent);
+
+    // parse own
+    switch (aSVGToken)
+    {
+        case SVGToken::Style:
+        {
+            readLocalCssStyle(aContent);
+            break;
+        }
+        case SVGToken::Transform:
+        {
+            const basegfx::B2DHomMatrix aMatrix(readTransform(aContent, *this));
+
+            if (!aMatrix.isIdentity())
+            {
+                setTransform(aMatrix);
+            }
+            break;
+        }
+        default:
+        {
+            break;
+        }
+    }
+}
+
+void SvgSwitchNode::decomposeSvgNode(drawinglayer::primitive2d::Primitive2DContainer& rTarget,
+                                     bool bReferenced) const
+{
+    // #i125258# for SVGTokenG decompose children
+    const SvgStyleAttributes* pStyle = getSvgStyleAttributes();
+
+    if (pStyle)
+    {
+        drawinglayer::primitive2d::Primitive2DContainer aContent;
+
+        const auto& rChildren = getChildren();
+        const sal_uInt32 nCount(rChildren.size());
+        OUString sLanguage(SvtSysLocaleOptions().GetRealUILanguageTag().getLanguage());
+
+        SvgNode* pNodeToDecompose = nullptr;
+        for (sal_uInt32 a(0); a < nCount; a++)
+        {
+            SvgNode* pCandidate = rChildren[a].get();
+
+            if (pCandidate && Display::None != pCandidate->getDisplay())
+            {
+                std::vector<OUString> aSystemLanguage = pCandidate->getSystemLanguage();
+                if (!sLanguage.isEmpty() && !aSystemLanguage.empty())
+                {
+                    for (const OUString& sSystemLang : aSystemLanguage)
+                    {
+                        if (sSystemLang == sLanguage)
+                        {
+                            pNodeToDecompose = pCandidate;
+                            break;
+                        }
+                    }
+                }
+                else
+                {
+                    pNodeToDecompose = pCandidate;
+                }
+            }
+
+            if (pNodeToDecompose)
+            {
+                pNodeToDecompose->decomposeSvgNode(aContent, bReferenced);
+                // break once it's descomposed
+                break;
+            }
+        }
+
+        if (!aContent.empty())
+        {
+            pStyle->add_postProcess(rTarget, std::move(aContent), getTransform());
+        }
+    }
+}
+
+} // end of namespace svgio::svgreader
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/svgio/source/svgreader/svgtoken.cxx b/svgio/source/svgreader/svgtoken.cxx
index b6e22b63c547..3f5ac5c7a306 100644
--- a/svgio/source/svgreader/svgtoken.cxx
+++ b/svgio/source/svgreader/svgtoken.cxx
@@ -114,6 +114,7 @@ constexpr auto aSVGTokenMap = frozen::make_unordered_map<std::u16string_view, SV
     { u"patternContentUnits", SVGToken::PatternContentUnits },
     { u"patternTransform", SVGToken::PatternTransform },
     { u"opacity", SVGToken::Opacity },
+    { u"systemLanguage", SVGToken::SystemLanguage },
     { u"visibility", SVGToken::Visibility },
     { u"title", SVGToken::Title },
     { u"desc", SVGToken::Desc },