1 files changed, 114 insertions, 0 deletions
diff --git a/src/ui/widget/style-subject.h b/src/ui/widget/style-subject.h
new file mode 100644
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+++ b/src/ui/widget/style-subject.h
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/**
+ * @file
+ * Abstraction for different style widget operands. Used by ObjectCompositeSettings in Layers and
+ * Fill and Stroke dialogs. Dialog is responsible for keeping desktop pointer valid.
+ *
+ * This class is due to the need to differentiate between layers and objects but a layer is just a
+ * a group object with an extra tag. There should be no need to differentiate between the two.
+ * To do: remove this class and intergrate the functionality into ObjectCompositeSettings.
+ */
+/*
+ * Copyright (C) 2007 MenTaLguY <mental@rydia.net>
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+#ifndef SEEN_INKSCAPE_UI_WIDGET_STYLE_SUBJECT_H
+#define SEEN_INKSCAPE_UI_WIDGET_STYLE_SUBJECT_H
+
+#include <optional>
+#include <2geom/rect.h>
+#include <cstddef>
+#include <sigc++/sigc++.h>
+
+#include "object/sp-item.h"
+#include "object/sp-tag.h"
+#include "object/sp-tag-use.h"
+#include "object/sp-tag-use-reference.h"
+
+class SPDesktop;
+class SPObject;
+class SPCSSAttr;
+class SPStyle;
+
+namespace Inkscape {
+class Selection;
+}
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+class StyleSubject {
+public:
+    class Selection;
+    class CurrentLayer;
+
+
+    StyleSubject();
+    virtual ~StyleSubject();
+
+    void setDesktop(SPDesktop *desktop);
+    SPDesktop *getDesktop() const { return _desktop; }
+
+    virtual Geom::OptRect getBounds(SPItem::BBoxType type) = 0;
+    virtual int queryStyle(SPStyle *query, int property) = 0;
+    virtual void setCSS(SPCSSAttr *css) = 0;
+    virtual std::vector<SPObject*> list(){return std::vector<SPObject*>();};
+
+    sigc::connection connectChanged(sigc::signal<void>::slot_type slot) {
+        return _changed_signal.connect(slot);
+    }
+
+protected:
+    virtual void _afterDesktopSwitch(SPDesktop */*desktop*/) {}
+    void _emitChanged() { _changed_signal.emit(); }
+    void _emitModified(Inkscape::Selection* selection, guint flags) {
+        // Do not say this object has styles unless it's style has been modified
+        if (flags & (SP_OBJECT_STYLE_MODIFIED_FLAG)) {
+            _emitChanged();
+        }
+    }
+
+private:
+    sigc::signal<void> _changed_signal;
+    SPDesktop *_desktop = nullptr;
+};
+
+class StyleSubject::Selection : public StyleSubject {
+public:
+    Selection();
+    ~Selection() override;
+
+    Geom::OptRect getBounds(SPItem::BBoxType type) override;
+    int queryStyle(SPStyle *query, int property) override;
+    void setCSS(SPCSSAttr *css) override;
+    std::vector<SPObject*> list() override;
+
+protected:
+    void _afterDesktopSwitch(SPDesktop *desktop) override;
+
+private:
+    Inkscape::Selection *_getSelection() const;
+
+    sigc::connection _sel_changed;
+    sigc::connection _subsel_changed;
+    sigc::connection _sel_modified;
+};
+
+}
+}
+}
+
+#endif // SEEN_INKSCAPE_UI_WIDGET_STYLE_SUBJECT_H
+
+/*
+  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 :