1 files changed, 151 insertions, 0 deletions
diff --git a/src/attribute-rel-svg.cpp b/src/attribute-rel-svg.cpp
new file mode 100644
index 0000000..8329d3f
--- /dev/null
+++ b/src/attribute-rel-svg.cpp
@@ -0,0 +1,151 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * TODO: insert short description here
+ *//*
+ * Authors: see git history
+ *
+ * Copyright (C) 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+/*
+ * attribute-rel-svg.cpp
+ *
+ *  Created on: Jul 25, 2011
+ *      Author: abhishek
+ */
+
+/** \class SPAttributeRelSVG
+ *
+ * SPAttributeRelSVG class stores the mapping of element->attribute
+ * relationship and provides a static function to access that
+ * mapping indirectly(only reading).
+ */
+
+#include <fstream>
+#include <sstream>
+
+#include "attribute-rel-svg.h"
+
+#include "io/resource.h"
+#include "path-prefix.h"
+#include "preferences.h"
+
+SPAttributeRelSVG * SPAttributeRelSVG::instance = nullptr;
+bool SPAttributeRelSVG::foundFile = false;
+
+/*
+ * This function returns true if element is an SVG element.
+ */
+bool SPAttributeRelSVG::isSVGElement(Glib::ustring element)
+{
+    if (SPAttributeRelSVG::instance == nullptr) {
+        SPAttributeRelSVG::instance = new SPAttributeRelSVG();
+    }
+
+    // Always valid if data file not found!
+    if( !foundFile ) return true;
+
+    // Strip off "svg:" from the element's name
+    Glib::ustring temp = element;
+    if ( temp.find("svg:") != std::string::npos ) {
+        temp.erase( temp.find("svg:"), 4 );
+    }
+
+    return (SPAttributeRelSVG::instance->attributesOfElements.count(temp) > 0);
+}
+
+/*
+ * This functions checks whether an element -> attribute pair is allowed or not
+ */
+bool SPAttributeRelSVG::findIfValid(Glib::ustring attribute, Glib::ustring element)
+{
+    if (SPAttributeRelSVG::instance == nullptr) {
+        SPAttributeRelSVG::instance = new SPAttributeRelSVG();
+    }
+
+    // Always valid if data file not found!
+    if( !foundFile ) return true;
+
+    // Strip off "svg:" from the element's name
+    Glib::ustring temp = element;
+    if ( temp.find("svg:") != std::string::npos ) {
+        temp.erase( temp.find("svg:"), 4 );
+    }
+    
+    // Check for attributes with -, role, aria etc. to allow for more accessibility
+    // clang-format off
+    if (attribute[0] == '-'
+        || attribute.substr(0,4) == "role"
+        || attribute.substr(0,4) == "aria"
+        || attribute.substr(0,5) == "xmlns"
+        || attribute.substr(0,9) == "inkscape:"
+        || attribute.substr(0,9) == "sodipodi:"
+        || attribute.substr(0,4) == "rdf:"
+        || attribute.substr(0,3) == "cc:"
+        || attribute.substr(0,4) == "ns1:"  // JessyInk
+        || (SPAttributeRelSVG::instance->attributesOfElements[temp].find(attribute)
+            != SPAttributeRelSVG::instance->attributesOfElements[temp].end()) ) {
+    // clang-format on
+        return true;
+    } else {
+        //g_warning( "Invalid attribute: %s used on <%s>", attribute.c_str(), element.c_str() );
+        return false;
+    }
+}
+
+/*
+ * One timer singleton constructor, to load the element -> attributes data
+ * into memory.
+ */
+SPAttributeRelSVG::SPAttributeRelSVG()
+{
+    std::fstream f;
+    
+    // Read data from standard path
+    using namespace Inkscape::IO::Resource;
+    auto filepath = get_path_string(SYSTEM, ATTRIBUTES, "svgprops");
+
+    f.open(filepath.c_str(), std::ios::in);
+
+    if (!f.is_open()) {
+        // Display warning for file not open
+        g_warning("Could not open the data file for XML attribute-element map construction: %s", filepath.c_str());
+        f.close();
+        return ;
+    }
+
+    foundFile = true;
+
+    while (!f.eof()){
+        std::stringstream ss;
+        std::string s;
+
+        std::getline(f,s,'"');
+        std::getline(f,s,'"');
+        if(s.size() > 0 && s[0] != '\n'){
+            std::string prop = s;
+            getline(f,s);
+            ss << s;
+
+            while(std::getline(ss,s,'"')){
+                std::string element;
+                std::getline(ss,s,'"');
+                element = s;
+                attributesOfElements[element].insert(prop);
+            }
+        }
+    }
+    
+    f.close();
+}
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :