1 files changed, 227 insertions, 0 deletions
diff --git a/src/sp-line.cpp b/src/sp-line.cpp
new file mode 100644
index 000000000..cca470530
--- /dev/null
+++ b/src/sp-line.cpp
@@ -0,0 +1,227 @@
+#define __SP_LINE_C__
+
+/*
+ * SVG <line> implementation
+ *
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *
+ * Copyright (C) 1999-2002 Lauris Kaplinski
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+#include "attributes.h"
+#include "style.h"
+#include "sp-line.h"
+#include "display/curve.h"
+#include <glibmm/i18n.h>
+#include <libnr/nr-matrix-fns.h>
+#include <xml/repr.h>
+
+static void sp_line_class_init (SPLineClass *klass);
+static void sp_line_init (SPLine *line);
+
+static void sp_line_build (SPObject * object, SPDocument * document, Inkscape::XML::Node * repr);
+static void sp_line_set (SPObject *object, unsigned int key, const gchar *value);
+static Inkscape::XML::Node *sp_line_write (SPObject *object, Inkscape::XML::Node *repr, guint flags);
+
+static gchar *sp_line_description (SPItem * item);
+static NR::Matrix sp_line_set_transform(SPItem *item, NR::Matrix const &xform);
+
+static void sp_line_update (SPObject *object, SPCtx *ctx, guint flags);
+static void sp_line_set_shape (SPShape *shape);
+
+static SPShapeClass *parent_class;
+
+GType
+sp_line_get_type (void)
+{
+	static GType line_type = 0;
+
+	if (!line_type) {
+		GTypeInfo line_info = {
+			sizeof (SPLineClass),
+			NULL,	/* base_init */
+			NULL,	/* base_finalize */
+			(GClassInitFunc) sp_line_class_init,
+			NULL,	/* klass_finalize */
+			NULL,	/* klass_data */
+			sizeof (SPLine),
+			16,	/* n_preallocs */
+			(GInstanceInitFunc) sp_line_init,
+			NULL,	/* value_table */
+		};
+		line_type = g_type_register_static (SP_TYPE_SHAPE, "SPLine", &line_info, (GTypeFlags)0);
+	}
+	return line_type;
+}
+
+static void
+sp_line_class_init (SPLineClass *klass)
+{
+	parent_class = (SPShapeClass *) g_type_class_ref (SP_TYPE_SHAPE);
+
+	SPObjectClass *sp_object_class = (SPObjectClass *) klass;
+	sp_object_class->build = sp_line_build;
+	sp_object_class->set = sp_line_set;
+	sp_object_class->write = sp_line_write;
+
+	SPItemClass *item_class = (SPItemClass *) klass;
+	item_class->description = sp_line_description;
+	item_class->set_transform = sp_line_set_transform;
+
+	sp_object_class->update = sp_line_update;
+
+	SPShapeClass *shape_class = (SPShapeClass *) klass;
+	shape_class->set_shape = sp_line_set_shape;
+}
+
+static void
+sp_line_init (SPLine * line)
+{
+	line->x1.unset();
+	line->y1.unset();
+	line->x2.unset();
+	line->y2.unset();
+}
+
+
+static void
+sp_line_build (SPObject * object, SPDocument * document, Inkscape::XML::Node * repr)
+{
+        if (((SPObjectClass *) parent_class)->build) {
+		((SPObjectClass *) parent_class)->build (object, document, repr);
+        }
+
+	sp_object_read_attr (object, "x1");
+	sp_object_read_attr (object, "y1");
+	sp_object_read_attr (object, "x2");
+	sp_object_read_attr (object, "y2");
+}
+
+static void
+sp_line_set (SPObject *object, unsigned int key, const gchar *value)
+{
+	SPLine * line = SP_LINE (object);
+
+	/* fixme: we should really collect updates */
+
+	switch (key) {
+	case SP_ATTR_X1:
+	        line->x1.readOrUnset(value);
+		object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+		break;
+	case SP_ATTR_Y1:
+	        line->y1.readOrUnset(value);
+		object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+		break;
+	case SP_ATTR_X2:
+	        line->x2.readOrUnset(value);
+		object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+		break;
+	case SP_ATTR_Y2:
+	        line->y2.readOrUnset(value);
+		object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+		break;
+	default:
+		if (((SPObjectClass *) parent_class)->set)
+			((SPObjectClass *) parent_class)->set (object, key, value);
+		break;
+	}
+}
+
+static void
+sp_line_update (SPObject *object, SPCtx *ctx, guint flags)
+{
+	if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
+		SPLine *line = SP_LINE (object);
+
+ 		SPStyle const *style = object->style;
+ 		double const d = 1.0 / NR::expansion(((SPItemCtx const *) ctx)->i2vp);
+		double const em = style->font_size.computed;
+		double const ex = em * 0.5;  // fixme: get from pango or libnrtype.
+ 		line->x1.update(em, ex, d);
+ 		line->x2.update(em, ex, d);
+ 		line->y1.update(em, ex, d);
+ 		line->y2.update(em, ex, d);
+
+		sp_shape_set_shape ((SPShape *) object);
+	}
+
+	if (((SPObjectClass *) parent_class)->update)
+		((SPObjectClass *) parent_class)->update (object, ctx, flags);
+}
+
+
+static Inkscape::XML::Node *
+sp_line_write (SPObject *object, Inkscape::XML::Node *repr, guint flags)
+{
+	SPLine *line  = SP_LINE (object);
+
+	if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
+		repr = sp_repr_new ("svg:line");
+	}
+
+	if (repr != SP_OBJECT_REPR (object)) {
+		repr->mergeFrom(SP_OBJECT_REPR (object), "id");
+	}
+
+	sp_repr_set_svg_double(repr, "x1", line->x1.computed);
+	sp_repr_set_svg_double(repr, "y1", line->y1.computed);
+	sp_repr_set_svg_double(repr, "x2", line->x2.computed);
+	sp_repr_set_svg_double(repr, "y2", line->y2.computed);
+
+	if (((SPObjectClass *) (parent_class))->write)
+		((SPObjectClass *) (parent_class))->write (object, repr, flags);
+
+	return repr;
+}
+
+static gchar *
+sp_line_description(SPItem *item)
+{
+	return g_strdup(_("<b>Line</b>"));
+}
+
+static NR::Matrix
+sp_line_set_transform (SPItem *item, NR::Matrix const &xform)
+{
+	SPLine *line = SP_LINE (item);
+	NR::Point points[2];
+
+	points[0] = NR::Point(line->x1.computed, line->y1.computed);
+	points[1] = NR::Point(line->x2.computed, line->y2.computed);
+
+	points[0] *= xform;
+	points[1] *= xform;
+
+	line->x1.computed = points[0][NR::X];
+	line->y1.computed = points[0][NR::Y];
+	line->x2.computed = points[1][NR::X];
+	line->y2.computed = points[1][NR::Y];
+
+	sp_item_adjust_stroke(item, NR::expansion(xform));
+
+	SP_OBJECT (item)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
+
+	return NR::identity();
+}
+
+static void
+sp_line_set_shape (SPShape *shape)
+{
+	SPLine *line = SP_LINE (shape);
+
+	SPCurve *c = sp_curve_new ();
+
+	sp_curve_moveto (c, line->x1.computed, line->y1.computed);
+	sp_curve_lineto (c, line->x2.computed, line->y2.computed);
+
+	sp_shape_set_curve_insync (shape, c, TRUE); // *_insync does not call update, avoiding infinite recursion when set_shape is called by update
+
+	sp_curve_unref (c);
+}