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+/* -*- 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 Mate 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 Mate 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 Mate 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 <[email protected]>
+ Ramiro Estrugo <[email protected]>
+*/
+
+#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;
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-05 17:55:18 +0000