Adding upstream version 4:24.2.0.upstream/4%24.2.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 231 insertions, 0 deletions

diff --git a/svgio/source/svgreader/svgstylenode.cxx b/svgio/source/svgreader/svgstylenode.cxx
new file mode 100644
index 0000000000..88b380cf3b
--- /dev/null
+++ b/svgio/source/svgreader/svgstylenode.cxx
@@ -0,0 +1,231 @@
+/* -*- 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 <svgstylenode.hxx>
+#include <svgdocument.hxx>
+#include <o3tl/string_view.hxx>
+#include <osl/diagnose.h>
+
+namespace svgio::svgreader
+{
+        SvgStyleNode::SvgStyleNode(
+            SvgDocument& rDocument,
+            SvgNode* pParent)
+        :   SvgNode(SVGToken::Style, rDocument, pParent),
+            mbTextCss(true)
+        {
+        }
+
+        // #i125258# no parent when we are a CssStyle holder to break potential loops because
+        // when using CssStyles we jump uncontrolled inside the node tree hierarchy
+        bool SvgStyleNode::supportsParentStyle() const
+        {
+            if(isTextCss())
+            {
+                return false;
+            }
+
+            // call parent
+            return SvgNode::supportsParentStyle();
+        }
+
+        void SvgStyleNode::parseAttribute(SVGToken aSVGToken, const OUString& aContent)
+        {
+            // call parent
+            SvgNode::parseAttribute(aSVGToken, aContent);
+
+            // parse own
+            switch(aSVGToken)
+            {
+                case SVGToken::Type:
+                {
+                    if(!aContent.isEmpty())
+                    {
+                        if(!o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), u"text/css"))
+                        {
+                            setTextCss(false);
+                        }
+                    }
+                    break;
+                }
+                default:
+                {
+                    break;
+                }
+            }
+        }
+
+        void SvgStyleNode::addCssStyleSheet(std::u16string_view aSelectors, const SvgStyleAttributes& rNewStyle)
+        {
+            // aSelectors: CssStyle selectors, any combination, no comma separations, no spaces at start/end
+            // rNewStyle: the already prepared style to register on that name
+            if(aSelectors.empty())
+                return;
+
+            std::vector< OUString > aSelectorParts;
+            const sal_Int32 nLen(aSelectors.size());
+            sal_Int32 nPos(0);
+            OUStringBuffer aToken;
+
+            // split into single tokens (currently only space separator)
+            while(nPos < nLen)
+            {
+                const sal_Int32 nInitPos(nPos);
+                copyToLimiter(aSelectors, u' ', nPos, aToken, nLen);
+                skip_char(aSelectors, u' ', nPos, nLen);
+                const OUString aSelectorPart(o3tl::trim(aToken));
+                aToken.setLength(0);
+
+                if(!aSelectorPart.isEmpty())
+                {
+                    aSelectorParts.push_back(aSelectorPart);
+                }
+
+                if(nInitPos == nPos)
+                {
+                    OSL_ENSURE(false, "Could not interpret on current position (!)");
+                    nPos++;
+                }
+            }
+
+            if(aSelectorParts.empty())
+                return;
+
+            OUStringBuffer aConcatenatedSelector;
+
+            // re-combine without spaces, create a unique name (for now)
+            for(const auto &a : aSelectorParts)
+            {
+                aConcatenatedSelector.append(a);
+            }
+
+            // CssStyles in SVG are currently not completely supported; the current idea for
+            // supporting the needed minimal set is to register CssStyles associated to a string
+            // which is just the space-char cleaned, concatenated Selectors. The part to 'match'
+            // these is in fillCssStyleVectorUsingHierarchyAndSelectors. There, the same string is
+            // built up using the priorities of local CssStyle, Id, Class and other info combined
+            // with the existing hierarchy. This creates a specificity and priority-sorted local
+            // list for each node which is then chained using get/setCssStyleParent.
+            // The current solution is capable of solving space-separated selectors which can be
+            // mixed between Id, Class and type specifiers.
+            // When CssStyles need more specific solving, the start point is here; remember the
+            // needed infos not in maIdStyleTokenMapperList at the document, but select evtl.
+            // more specific infos there in a class capable of handling more complex matchings.
+            // Additionally fillCssStyleVector (or the mechanism above that when a linked list of
+            // SvgStyleAttributes will not do it) will have to be adapted to make use of it.
+
+            // register new style at document for (evtl. concatenated) stylename
+            const_cast< SvgDocument& >(getDocument()).addSvgStyleAttributesToMapper(aConcatenatedSelector.makeStringAndClear(), rNewStyle);
+        }
+
+        void SvgStyleNode::addCssStyleSheet(std::u16string_view aSelectors, std::u16string_view aContent)
+        {
+            // aSelectors: possible comma-separated list of CssStyle definitions, no spaces at start/end
+            // aContent: the svg style definitions as string
+            if(aSelectors.empty() || aContent.empty())
+                return;
+
+            // comma-separated split (Css abbreviation for same style for multiple selectors)
+            const sal_Int32 nLen(aSelectors.size());
+            sal_Int32 nPos(0);
+            OUStringBuffer aToken;
+
+            while(nPos < nLen)
+            {
+                const sal_Int32 nInitPos(nPos);
+                copyToLimiter(aSelectors, u',', nPos, aToken, nLen);
+                skip_char(aSelectors, u' ', u',', nPos, nLen);
+
+                const OUString aSingleName(o3tl::trim(aToken));
+                aToken.setLength(0);
+
+                // add the current css class only if wasn't previously added
+                auto [aIterator, bIsNew] = maSvgStyleAttributes.try_emplace(aSingleName);
+                if (bIsNew)
+                {
+                    // create new style and add to local list (for ownership control) and
+                    // in case it's written to again in future classes to prevent overwrites
+                    aIterator->second = std::make_unique<SvgStyleAttributes>(*this);
+                }
+                const std::unique_ptr<SvgStyleAttributes>& pCurrentStyle = aIterator->second;
+
+                // fill with content
+                pCurrentStyle->readCssStyle(aContent);
+
+                if(aSingleName.getLength())
+                {
+                    addCssStyleSheet(aSingleName, *pCurrentStyle);
+                }
+
+                if(nInitPos == nPos)
+                {
+                    OSL_ENSURE(false, "Could not interpret on current position (!)");
+                    nPos++;
+                }
+            }
+        }
+
+        void SvgStyleNode::addCssStyleSheet(std::u16string_view aSelectorsAndContent)
+        {
+            const sal_Int32 nLen(aSelectorsAndContent.size());
+
+            if(!nLen)
+                return;
+
+            sal_Int32 nPos(0);
+            OUStringBuffer aToken;
+
+            while(nPos < nLen)
+            {
+                // read the full selectors (may be multiple, comma-separated)
+                const sal_Int32 nInitPos(nPos);
+                skip_char(aSelectorsAndContent, u' ', nPos, nLen);
+                copyToLimiter(aSelectorsAndContent, u'{', nPos, aToken, nLen);
+                skip_char(aSelectorsAndContent, u' ', u'{', nPos, nLen);
+
+                const OUString aSelectors(o3tl::trim(aToken));
+                aToken.setLength(0);
+                OUString aContent;
+
+                if(!aSelectors.isEmpty() && nPos < nLen)
+                {
+                    // isolate content as text, embraced by '{' and '}'
+                    copyToLimiter(aSelectorsAndContent, u'}', nPos, aToken, nLen);
+                    skip_char(aSelectorsAndContent, u' ', u'}', nPos, nLen);
+
+                    aContent = o3tl::trim(aToken);
+                    aToken.setLength(0);
+                }
+
+                if(!aSelectors.isEmpty() && !aContent.isEmpty())
+                {
+                    addCssStyleSheet(aSelectors, aContent);
+                }
+
+                if(nInitPos == nPos)
+                {
+                    OSL_ENSURE(false, "Could not interpret on current position (!)");
+                    nPos++;
+                }
+            }
+        }
+
+} // end of namespace svgio::svgreader
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */