1 files changed, 177 insertions, 0 deletions
diff --git a/src/ui/shape-editor.cpp b/src/ui/shape-editor.cpp
new file mode 100644
index 000000000..0b9fc24c5
--- /dev/null
+++ b/src/ui/shape-editor.cpp
@@ -0,0 +1,177 @@
+/*
+ * Inkscape::ShapeEditor
+ *
+ * Authors:
+ *   bulia byak <buliabyak@users.sf.net>
+ *   Krzysztof Kosiński <tweenk.pl@gmail.com>
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h>
+#include <glibmm/i18n.h>
+
+#include "desktop-handles.h"
+#include "document.h"
+#include "gc-anchored.h"
+#include "knotholder.h"
+#include "ui/object-edit.h"
+#include "sp-item.h"
+#include "sp-object.h"
+#include "ui/shape-editor.h"
+#include "xml/node-event-vector.h"
+
+//using Inkscape::createKnotHolder;
+
+namespace Inkscape {
+namespace UI {
+
+bool ShapeEditor::_blockSetItem = false;
+
+ShapeEditor::ShapeEditor(SPDesktop *dt) {
+    this->desktop = dt;
+    this->knotholder = NULL;
+    this->knotholder_listener_attached_for = NULL;
+}
+
+ShapeEditor::~ShapeEditor() {
+    unset_item();
+}
+
+void ShapeEditor::unset_item(bool keep_knotholder) {
+    if (this->knotholder) {
+        Inkscape::XML::Node *old_repr = this->knotholder->repr;
+        if (old_repr && old_repr == knotholder_listener_attached_for) {
+            sp_repr_remove_listener_by_data(old_repr, this);
+            Inkscape::GC::release(old_repr);
+            knotholder_listener_attached_for = NULL;
+        }
+
+        if (!keep_knotholder) {
+            delete this->knotholder;
+            this->knotholder = NULL;
+        }
+    }
+}
+
+bool ShapeEditor::has_knotholder() {
+    return this->knotholder != NULL;
+}
+
+void ShapeEditor::update_knotholder() {
+    if (this->knotholder)
+        this->knotholder->update_knots();
+}
+
+bool ShapeEditor::has_local_change() {
+    return (this->knotholder && this->knotholder->local_change != 0);
+}
+
+void ShapeEditor::decrement_local_change() {
+    if (this->knotholder) {
+        this->knotholder->local_change = FALSE;
+    }
+}
+
+const SPItem *ShapeEditor::get_item() {
+    const SPItem *item = NULL;
+    if (this->has_knotholder()) {
+        item = this->knotholder->getItem();
+    }
+    return item;
+}
+
+void ShapeEditor::event_attr_changed(Inkscape::XML::Node *, gchar const *name, gchar const *, gchar const *, bool, void *data)
+{
+    g_assert(data);
+    ShapeEditor *sh = static_cast<ShapeEditor *>(data);
+    bool changed_kh = false;
+
+    if (sh->has_knotholder())
+    {
+        changed_kh = !sh->has_local_change();
+        sh->decrement_local_change();
+        if (changed_kh) {
+            // this can happen if an LPEItem's knotholder handle was dragged, in which case we want
+            // to keep the knotholder; in all other cases (e.g., if the LPE itself changes) we delete it
+            sh->reset_item(!strcmp(name, "d"));
+        }
+    }
+}
+
+static Inkscape::XML::NodeEventVector shapeeditor_repr_events = {
+    NULL, /* child_added */
+    NULL, /* child_removed */
+    ShapeEditor::event_attr_changed,
+    NULL, /* content_changed */
+    NULL  /* order_changed */
+};
+
+
+void ShapeEditor::set_item(SPItem *item, bool keep_knotholder) {
+    if (_blockSetItem) {
+        return;
+    }
+
+    // this happens (and should only happen) when for an LPEItem having both knotholder and
+    // nodepath the knotholder is adapted; in this case we don't want to delete the knotholder
+    // since this freezes the handles
+    unset_item(keep_knotholder);
+
+    if (item) {
+        Inkscape::XML::Node *repr;
+        if (!this->knotholder) {
+            // only recreate knotholder if none is present
+            this->knotholder = createKnotHolder(item, desktop);
+        }
+        if (this->knotholder) {
+            this->knotholder->update_knots();
+            // setting new listener
+            repr = this->knotholder->repr;
+            if (repr != knotholder_listener_attached_for) {
+                Inkscape::GC::anchor(repr);
+                sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
+                knotholder_listener_attached_for = repr;
+            }
+        }
+    }
+}
+
+
+/** FIXME: This thing is only called when the item needs to be updated in response to repr change.
+   Why not make a reload function in KnotHolder? */
+void ShapeEditor::reset_item(bool keep_knotholder)
+{
+    if (knotholder) {
+        SPObject *obj = sp_desktop_document(desktop)->getObjectByRepr(knotholder_listener_attached_for); /// note that it is not certain that this is an SPItem; it could be a LivePathEffectObject.
+        set_item(SP_ITEM(obj), keep_knotholder);
+    }
+}
+
+/**
+ * Returns true if this ShapeEditor has a knot above which the mouse currently hovers.
+ */
+bool ShapeEditor::knot_mouseover() const {
+    if (this->knotholder) {
+        return knotholder->knot_mouseover();
+    }
+
+    return false;
+}
+
+} // namespace UI
+} // namespace Inkscape
+
+/*
+  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 :