1 files changed, 106 insertions, 0 deletions
diff --git a/src/object/filters/mergenode.cpp b/src/object/filters/mergenode.cpp
new file mode 100644
index 0000000..59f0d3f
--- /dev/null
+++ b/src/object/filters/mergenode.cpp
@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** \file
+ * feMergeNode implementation. A feMergeNode contains the name of one
+ * input image for feMerge.
+ */
+/*
+ * Authors:
+ *   Kees Cook <kees@outflux.net>
+ *   Niko Kiirala <niko@kiirala.com>
+ *   Abhishek Sharma
+ *
+ * Copyright (C) 2004,2007 authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "mergenode.h"
+#include "merge.h"
+
+#include "attributes.h"
+
+#include "display/nr-filter-types.h"
+
+#include "xml/repr.h"
+
+SPFeMergeNode::SPFeMergeNode()
+    : SPObject(), input(Inkscape::Filters::NR_FILTER_SLOT_NOT_SET) {
+}
+
+SPFeMergeNode::~SPFeMergeNode() = default;
+
+/**
+ * Reads the Inkscape::XML::Node, and initializes SPFeMergeNode variables.  For this to get called,
+ * our name must be associated with a repr via "sp_object_type_register".  Best done through
+ * sp-object-repr.cpp's repr_name_entries array.
+ */
+void SPFeMergeNode::build(SPDocument */*document*/, Inkscape::XML::Node */*repr*/) {
+	this->readAttr(SPAttr::IN_);
+}
+
+/**
+ * Drops any allocated memory.
+ */
+void SPFeMergeNode::release() {
+	SPObject::release();
+}
+
+/**
+ * Sets a specific value in the SPFeMergeNode.
+ */
+void SPFeMergeNode::set(SPAttr key, gchar const *value) {
+    SPFeMerge *parent = SP_FEMERGE(this->parent);
+
+    if (key == SPAttr::IN_) {
+        int input = parent->read_in(value);
+        if (input != this->input) {
+            this->input = input;
+            this->requestModified(SP_OBJECT_MODIFIED_FLAG);
+        }
+    }
+
+    /* See if any parents need this value. */
+    SPObject::set(key, value);
+}
+
+/**
+ * Receives update notifications.
+ */
+void SPFeMergeNode::update(SPCtx *ctx, guint flags) {
+    if (flags & SP_OBJECT_MODIFIED_FLAG) {
+        this->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
+    }
+
+    SPObject::update(ctx, flags);
+}
+
+/**
+ * Writes its settings to an incoming repr object, if any.
+ */
+Inkscape::XML::Node* SPFeMergeNode::write(Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags) {
+    // Inkscape-only this, not copied during an "plain SVG" dump:
+    if (flags & SP_OBJECT_WRITE_EXT) {
+        if (repr) {
+            // is this sane?
+            //repr->mergeFrom(object->getRepr(), "id");
+        } else {
+            repr = this->getRepr()->duplicate(doc);
+        }
+    }
+
+    SPObject::write(doc, repr, flags);
+
+    return repr;
+}
+
+
+/*
+  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:fileencoding=utf-8:textwidth=99 :