Adding the lacking HSL bubbles transparent

[inkscape.git] / src / helper / geom-curves.h

diff --git a/src/helper/geom-curves.h b/src/helper/geom-curves.h
index daf208e789787e84d91e31fd2ca2dcf4f1bc0468..7c181832c651927f5dc2d76c5108549a5a57f0e6 100644 (file)
--- a/src/helper/geom-curves.h
+++ b/src/helper/geom-curves.h
@@ -1,39 +1,56 @@
-#ifndef INKSCAPE_HELPER_GEOM_CURVES_H\r
-#define INKSCAPE_HELPER_GEOM_CURVES_H\r
-\r
-/**\r
- * Specific curve type functions for Inkscape, not provided by lib2geom.\r
- *\r
- * Author:\r
- *   Johan Engelen <goejendaagh@zonnet.nl>\r
- *\r
- * Copyright (C) 2008 Johan Engelen\r
- *\r
- * Released under GNU GPL\r
- */\r
-\r
-#include <2geom/hvlinesegment.h>\r
-\r
-inline bool is_straight_curve(Geom::Curve const & c) {\r
-    if( dynamic_cast<Geom::LineSegment const*>(&c) ||\r
-        dynamic_cast<Geom::HLineSegment const*>(&c) ||\r
-        dynamic_cast<Geom::VLineSegment const*>(&c) )\r
-    {\r
-        return true;\r
-    } else {\r
-        return false;\r
-    }\r
-}\r
-\r
-#endif  // INKSCAPE_HELPER_GEOM_CURVES_H\r
-\r
-/*\r
-  Local Variables:\r
-  mode:c++\r
-  c-file-style:"stroustrup"\r
-  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))\r
-  indent-tabs-mode:nil\r
-  fill-column:99\r
-  End:\r
-*/\r
-// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :\r
+#ifndef INKSCAPE_HELPER_GEOM_CURVES_H
+#define INKSCAPE_HELPER_GEOM_CURVES_H
+
+/**
+ * Specific curve type functions for Inkscape, not provided by lib2geom.
+ *
+ * Author:
+ *   Johan Engelen <goejendaagh@zonnet.nl>
+ *
+ * Copyright (C) 2008-2009 Johan Engelen
+ *
+ * Released under GNU GPL
+ */
+
+#include <2geom/hvlinesegment.h>
+#include <2geom/line.h>
+#include <2geom/bezier-curve.h>
+
+/// \todo un-inline this function
+inline bool is_straight_curve(Geom::Curve const & c) {
+    if( dynamic_cast<Geom::LineSegment const*>(&c) ||
+        dynamic_cast<Geom::HLineSegment const*>(&c) ||
+        dynamic_cast<Geom::VLineSegment const*>(&c) )
+    {
+        return true;
+    }
+    // the curve can be a quad/cubic bezier, but could still be a perfect straight line
+    // if the control points are exactly on the line connecting the initial and final points.
+    else if ( Geom::QuadraticBezier const *quad = dynamic_cast<Geom::QuadraticBezier const*>(&c) ) {
+        Geom::Line line( quad->initialPoint(), quad->finalPoint() );
+        if ( are_near((*quad)[1], line) ) {
+            return true;
+        }
+    }
+    else if ( Geom::CubicBezier const *cubic = dynamic_cast<Geom::CubicBezier const*>(&c) ) {
+        Geom::Line line( cubic->initialPoint(), cubic->finalPoint() );
+        if ( are_near((*cubic)[1], line) && are_near((*cubic)[2], line) ) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+#endif  // INKSCAPE_HELPER_GEOM_CURVES_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:encoding=utf-8:textwidth=99 :