1 files changed, 95 insertions, 0 deletions
diff --git a/src/live_effects/lpegroupbbox.cpp b/src/live_effects/lpegroupbbox.cpp
new file mode 100644
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+++ b/src/live_effects/lpegroupbbox.cpp
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) Steren Giannini 2008 <steren.giannini@gmail.com>
+ *   Abhishek Sharma
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "document.h"
+#include "live_effects/lpegroupbbox.h"
+#include "object/sp-clippath.h"
+#include "object/sp-mask.h"
+#include "object/sp-root.h"
+#include "object/sp-shape.h"
+#include "object/sp-item-group.h"
+#include "object/sp-lpe-item.h"
+
+namespace Inkscape {
+namespace LivePathEffect {
+
+/**
+ * Updates the \c boundingbox_X and \c boundingbox_Y values from the geometric bounding box of \c lpeitem.
+ *
+ * @pre   lpeitem must have an existing geometric boundingbox (usually this is guaranteed when: \code SP_SHAPE(lpeitem)->curve != NULL \endcode )
+ *        It's not possible to run LPEs on items without their original-d having a bbox.
+ * @param lpeitem   This is not allowed to be NULL.
+ * @param absolute  Determines whether the bbox should be calculated of the untransformed lpeitem (\c absolute = \c false)
+ *                  or of the transformed lpeitem (\c absolute = \c true) using sp_item_i2doc_affine.
+ * @post Updated values of boundingbox_X and boundingbox_Y. These intervals are set to empty intervals when the precondition is not met.
+ */
+
+Geom::OptRect
+GroupBBoxEffect::clip_mask_bbox(SPLPEItem *item, Geom::Affine transform)
+{
+    Geom::OptRect bbox;
+    Geom::Affine affine = transform * item->transform;
+    SPClipPath *clip_path = item->getClipObject();
+    if(clip_path) {
+        bbox.unionWith(clip_path->geometricBounds(affine));
+    }
+    SPMask * mask_path = item->getMaskObject();
+    if(mask_path) {
+        bbox.unionWith(mask_path->visualBounds(affine));
+    }
+    SPGroup * group = dynamic_cast<SPGroup *>(item);
+    if (group) {
+        std::vector<SPItem*> item_list = sp_item_group_item_list(group);
+        for (auto iter : item_list) {
+            SPLPEItem * subitem = dynamic_cast<SPLPEItem *>(iter);
+            if (subitem) {
+                bbox.unionWith(clip_mask_bbox(subitem, affine));
+            }
+        }
+    }
+    return bbox;
+}
+
+void GroupBBoxEffect::original_bbox(SPLPEItem const* lpeitem, bool absolute, bool clip_mask, Geom::Affine base_transform)
+{
+    // Get item bounding box
+    Geom::Affine transform;
+    if (absolute) {
+        transform = lpeitem->i2doc_affine();
+    }
+    else {
+        transform = base_transform;
+    }
+    
+    Geom::OptRect bbox = lpeitem->geometricBounds(transform);
+    if (clip_mask) {
+        SPLPEItem * item = const_cast<SPLPEItem *>(lpeitem);
+        bbox.unionWith(clip_mask_bbox(item, transform * item->transform.inverse()));
+    }
+    if (bbox) {
+        boundingbox_X = (*bbox)[Geom::X];
+        boundingbox_Y = (*bbox)[Geom::Y];
+    } else {
+        boundingbox_X = Geom::Interval();
+        boundingbox_Y = Geom::Interval();
+    }
+}
+
+} // namespace LivePathEffect
+} /* 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 :