1 files changed, 308 insertions, 0 deletions
diff --git a/eel/eel-art-extensions.c b/eel/eel-art-extensions.c
new file mode 100644
index 000000000..a74ccab07
--- /dev/null
+++ b/eel/eel-art-extensions.c
@@ -0,0 +1,308 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+
+/* eel-art-extensions.c - implementation of libart extension functions.
+
+   Copyright (C) 2000 Eazel, Inc.
+
+   The Gnome Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The Gnome Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the Gnome Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.
+
+   Authors: Darin Adler <darin@eazel.com>
+            Ramiro Estrugo <ramiro@eazel.com>
+*/
+
+#include <config.h>
+
+#include "eel-art-extensions.h"
+#include "eel-lib-self-check-functions.h"
+#include <math.h>
+
+const EelDRect eel_drect_empty = { 0.0, 0.0, 0.0, 0.0 };
+const EelIRect eel_irect_empty = { 0, 0, 0, 0 };
+const EelIPoint eel_ipoint_max = { G_MAXINT, G_MAXINT };
+const EelIPoint eel_ipoint_min = { G_MININT, G_MININT };
+const EelIPoint eel_ipoint_zero = { 0, 0 };
+const EelDimensions eel_dimensions_empty = { 0, 0 };
+
+void
+eel_irect_copy (EelIRect *dest, const EelIRect *src)
+{
+	dest->x0 = src->x0;
+	dest->y0 = src->y0;
+	dest->x1 = src->x1;
+	dest->y1 = src->y1;
+}
+
+void
+eel_irect_union (EelIRect *dest,
+		  const EelIRect *src1,
+		  const EelIRect *src2) {
+	if (eel_irect_is_empty (src1)) {
+		eel_irect_copy (dest, src2);
+	} else if (eel_irect_is_empty (src2)) {
+		eel_irect_copy (dest, src1);
+	} else {
+		dest->x0 = MIN (src1->x0, src2->x0);
+		dest->y0 = MIN (src1->y0, src2->y0);
+		dest->x1 = MAX (src1->x1, src2->x1);
+		dest->y1 = MAX (src1->y1, src2->y1);
+	}
+}
+
+void
+eel_irect_intersect (EelIRect *dest,
+		     const EelIRect *src1,
+		     const EelIRect *src2)
+{
+	dest->x0 = MAX (src1->x0, src2->x0);
+	dest->y0 = MAX (src1->y0, src2->y0);
+	dest->x1 = MIN (src1->x1, src2->x1);
+	dest->y1 = MIN (src1->y1, src2->y1);
+}
+
+gboolean
+eel_irect_is_empty (const EelIRect *src)
+{
+	return (src->x1 <= src->x0 ||
+		src->y1 <= src->y0);
+}
+
+EelIRect
+eel_irect_assign (int x,
+		      int y,
+		      int width,
+		      int height)
+{
+	EelIRect rectangle;
+
+	rectangle.x0 = x;
+	rectangle.y0 = y;
+	rectangle.x1 = rectangle.x0 + width;
+	rectangle.y1 = rectangle.y0 + height;
+
+	return rectangle;
+}
+
+/**
+ * eel_irect_assign_dimensions:
+ * 
+ * @x: X coodinate for resulting rectangle.
+ * @y: Y coodinate for resulting rectangle.
+ * @dimensions: A EelDimensions structure for the rect's width and height.
+ *
+ * Returns: An EelIRect with the given coordinates and dimensions.
+ */
+EelIRect
+eel_irect_assign_dimensions (int x,
+				 int y,
+				 EelDimensions dimensions)
+{
+	EelIRect rectangle;
+
+	rectangle.x0 = x;
+	rectangle.y0 = y;
+	rectangle.x1 = rectangle.x0 + dimensions.width;
+	rectangle.y1 = rectangle.y0 + dimensions.height;
+
+	return rectangle;
+}
+
+/**
+ * eel_irect_get_width:
+ * 
+ * @rectangle: An EelIRect.
+ *
+ * Returns: The width of the rectangle.
+ * 
+ */
+int
+eel_irect_get_width (EelIRect rectangle)
+{
+	return rectangle.x1 - rectangle.x0;
+}
+
+/**
+ * eel_irect_get_height:
+ * 
+ * @rectangle: An EelIRect.
+ *
+ * Returns: The height of the rectangle.
+ * 
+ */
+int
+eel_irect_get_height (EelIRect rectangle)
+{
+	return rectangle.y1 - rectangle.y0;
+}
+
+
+static void
+eel_drect_copy (EelDRect *dest,
+		const EelDRect *src)
+{
+	dest->x0 = src->x0;
+	dest->y0 = src->y0;
+	dest->x1 = src->x1;
+	dest->y1 = src->y1;
+}
+
+static gboolean
+eel_drect_is_empty (const EelDRect *src)
+{
+	return (src->x1 <= src->x0 || src->y1 <= src->y0);
+}
+
+void
+eel_drect_union (EelDRect *dest,
+		 const EelDRect *src1,
+		 const EelDRect *src2)
+{
+	if (eel_drect_is_empty (src1)) {
+		eel_drect_copy (dest, src2);
+	} else if (eel_drect_is_empty (src2)) {
+		eel_drect_copy (dest, src1);
+	} else {
+		dest->x0 = MIN (src1->x0, src2->x0);
+		dest->y0 = MIN (src1->y0, src2->y0);
+		dest->x1 = MAX (src1->x1, src2->x1);
+		dest->y1 = MAX (src1->y1, src2->y1);
+	}
+}
+
+
+/**
+ * eel_irect_contains_point:
+ * 
+ * @rectangle: An EelIRect.
+ * @x: X coordinate to test.
+ * @y: Y coordinate to test.
+ *
+ * Returns: A boolean value indicating whether the rectangle 
+ *          contains the x,y coordinate.
+ * 
+ */
+gboolean
+eel_irect_contains_point (EelIRect rectangle,
+			  int x,
+			  int y)
+{
+	return x >= rectangle.x0
+		&& x <= rectangle.x1
+		&& y >= rectangle.y0
+		&& y <= rectangle.y1;
+}
+
+gboolean
+eel_irect_hits_irect (EelIRect rectangle_a,
+			  EelIRect rectangle_b)
+{
+	EelIRect intersection;
+	eel_irect_intersect (&intersection, &rectangle_a, &rectangle_b);
+	return !eel_irect_is_empty (&intersection);
+}
+
+gboolean
+eel_irect_equal (EelIRect rectangle_a,
+		     EelIRect rectangle_b)
+{
+	return rectangle_a.x0 == rectangle_b.x0
+		&& rectangle_a.y0 == rectangle_b.y0
+		&& rectangle_a.x1 == rectangle_b.x1
+		&& rectangle_a.y1 == rectangle_b.y1;
+}
+
+/**
+ * eel_irect_align:
+ * 
+ * @container: The rectangle that is to contain the aligned rectangle.
+ * @aligned_width: Width of rectangle being algined.
+ * @aligned_height: Height of rectangle being algined.
+ * @x_alignment: X alignment.
+ * @y_alignment: Y alignment.
+ *
+ * Returns: A rectangle aligned within a container rectangle
+ *          using the given alignment parameters.
+ */
+EelIRect
+eel_irect_align (EelIRect container,
+		     int aligned_width,
+		     int aligned_height,
+		     float x_alignment,
+		     float y_alignment)
+{
+	EelIRect aligned;
+	int available_width;
+	int available_height;
+
+	if (eel_irect_is_empty (&container)) {
+		return eel_irect_empty;
+	}
+
+	if (aligned_width == 0 || aligned_height == 0) {
+		return eel_irect_empty;
+	}
+
+	/* Make sure the aligment parameters are within range */
+	x_alignment = MAX (0, x_alignment);
+	x_alignment = MIN (1.0, x_alignment);
+	y_alignment = MAX (0, y_alignment);
+	y_alignment = MIN (1.0, y_alignment);
+
+	available_width = eel_irect_get_width (container) - aligned_width;
+	available_height = eel_irect_get_height (container) - aligned_height;
+
+	aligned.x0 = floor (container.x0 + (available_width * x_alignment) + 0.5);
+	aligned.y0 = floor (container.y0 + (available_height * y_alignment) + 0.5);
+	aligned.x1 = aligned.x0 + aligned_width;
+	aligned.y1 = aligned.y0 + aligned_height;
+
+	return aligned;
+}
+
+
+/**
+ * eel_dimensions_are_empty:
+ * 
+ * @dimensions: A EelDimensions structure.
+ *
+ * Returns: Whether the dimensions are empty.
+ */
+gboolean
+eel_dimensions_are_empty (EelDimensions dimensions)
+{
+	return dimensions.width <= 0 || dimensions.height <= 0;
+}
+
+EelIRect 
+eel_irect_offset_by (EelIRect rectangle, int x, int y)
+{
+	rectangle.x0 += x;
+	rectangle.x1 += x;
+	rectangle.y0 += y;
+	rectangle.y1 += y;
+	
+	return rectangle;
+}
+
+EelIRect 
+eel_irect_scale_by (EelIRect rectangle, double scale)
+{
+	rectangle.x0 *= scale;
+	rectangle.x1 *= scale;
+	rectangle.y0 *= scale;
+	rectangle.y1 *= scale;
+	
+	return rectangle;
+}