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|
/* GTK - The GIMP Toolkit
* Copyright (C) 2011 Benjamin Otte <otte@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkroundedboxprivate.h"
#include "gtkcsscornervalueprivate.h"
#include "gtkcsstypesprivate.h"
#include "gtkstylecontextprivate.h"
#include <string.h>
/**
* _gtk_rounded_box_init_rect:
* @box: box to initialize
* @x: x coordinate of box
* @y: y coordinate of box
* @width: width of box
* @height: height of box
*
* Initializes the given @box to represent the given rectangle.
* The
**/
void
_gtk_rounded_box_init_rect (GtkRoundedBox *box,
double x,
double y,
double width,
double height)
{
memset (box, 0, sizeof (GtkRoundedBox));
box->box.x = x;
box->box.y = y;
box->box.width = width;
box->box.height = height;
}
/* clamp border radius, following CSS specs */
static void
gtk_rounded_box_clamp_border_radius (GtkRoundedBox *box)
{
gdouble factor = 1.0;
gdouble corners;
corners = box->corner[GTK_CSS_TOP_LEFT].horizontal + box->corner[GTK_CSS_TOP_RIGHT].horizontal;
if (corners != 0)
factor = MIN (factor, box->box.width / corners);
corners = box->corner[GTK_CSS_TOP_RIGHT].vertical + box->corner[GTK_CSS_BOTTOM_RIGHT].vertical;
if (corners != 0)
factor = MIN (factor, box->box.height / corners);
corners = box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal + box->corner[GTK_CSS_BOTTOM_LEFT].horizontal;
if (corners != 0)
factor = MIN (factor, box->box.width / corners);
corners = box->corner[GTK_CSS_TOP_LEFT].vertical + box->corner[GTK_CSS_BOTTOM_LEFT].vertical;
if (corners != 0)
factor = MIN (factor, box->box.height / corners);
box->corner[GTK_CSS_TOP_LEFT].horizontal *= factor;
box->corner[GTK_CSS_TOP_LEFT].vertical *= factor;
box->corner[GTK_CSS_TOP_RIGHT].horizontal *= factor;
box->corner[GTK_CSS_TOP_RIGHT].vertical *= factor;
box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal *= factor;
box->corner[GTK_CSS_BOTTOM_RIGHT].vertical *= factor;
box->corner[GTK_CSS_BOTTOM_LEFT].horizontal *= factor;
box->corner[GTK_CSS_BOTTOM_LEFT].vertical *= factor;
}
static void
_gtk_rounded_box_apply_border_radius (GtkRoundedBox *box,
GtkCssValue **corner,
GtkJunctionSides junction)
{
if (corner[GTK_CSS_TOP_LEFT] && (junction & GTK_JUNCTION_CORNER_TOPLEFT) == 0)
{
box->corner[GTK_CSS_TOP_LEFT].horizontal = _gtk_css_corner_value_get_x (corner[GTK_CSS_TOP_LEFT],
box->box.width);
box->corner[GTK_CSS_TOP_LEFT].vertical = _gtk_css_corner_value_get_y (corner[GTK_CSS_TOP_LEFT],
box->box.height);
}
if (corner[GTK_CSS_TOP_RIGHT] && (junction & GTK_JUNCTION_CORNER_TOPRIGHT) == 0)
{
box->corner[GTK_CSS_TOP_RIGHT].horizontal = _gtk_css_corner_value_get_x (corner[GTK_CSS_TOP_RIGHT],
box->box.width);
box->corner[GTK_CSS_TOP_RIGHT].vertical = _gtk_css_corner_value_get_y (corner[GTK_CSS_TOP_RIGHT],
box->box.height);
}
if (corner[GTK_CSS_BOTTOM_RIGHT] && (junction & GTK_JUNCTION_CORNER_BOTTOMRIGHT) == 0)
{
box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal = _gtk_css_corner_value_get_x (corner[GTK_CSS_BOTTOM_RIGHT],
box->box.width);
box->corner[GTK_CSS_BOTTOM_RIGHT].vertical = _gtk_css_corner_value_get_y (corner[GTK_CSS_BOTTOM_RIGHT],
box->box.height);
}
if (corner[GTK_CSS_BOTTOM_LEFT] && (junction & GTK_JUNCTION_CORNER_BOTTOMLEFT) == 0)
{
box->corner[GTK_CSS_BOTTOM_LEFT].horizontal = _gtk_css_corner_value_get_x (corner[GTK_CSS_BOTTOM_LEFT],
box->box.width);
box->corner[GTK_CSS_BOTTOM_LEFT].vertical = _gtk_css_corner_value_get_y (corner[GTK_CSS_BOTTOM_LEFT],
box->box.height);
}
gtk_rounded_box_clamp_border_radius (box);
}
void
_gtk_rounded_box_apply_border_radius_for_style (GtkRoundedBox *box,
GtkCssStyle *style,
GtkJunctionSides junction)
{
GtkCssValue *corner[4];
corner[GTK_CSS_TOP_LEFT] = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_TOP_LEFT_RADIUS);
corner[GTK_CSS_TOP_RIGHT] = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_TOP_RIGHT_RADIUS);
corner[GTK_CSS_BOTTOM_LEFT] = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_BOTTOM_LEFT_RADIUS);
corner[GTK_CSS_BOTTOM_RIGHT] = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_BORDER_BOTTOM_RIGHT_RADIUS);
_gtk_rounded_box_apply_border_radius (box, corner, junction);
}
void
_gtk_rounded_box_apply_outline_radius_for_style (GtkRoundedBox *box,
GtkCssStyle *style,
GtkJunctionSides junction)
{
GtkCssValue *corner[4];
corner[GTK_CSS_TOP_LEFT] = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_OUTLINE_TOP_LEFT_RADIUS);
corner[GTK_CSS_TOP_RIGHT] = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_OUTLINE_TOP_RIGHT_RADIUS);
corner[GTK_CSS_BOTTOM_LEFT] = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_OUTLINE_BOTTOM_LEFT_RADIUS);
corner[GTK_CSS_BOTTOM_RIGHT] = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_OUTLINE_BOTTOM_RIGHT_RADIUS);
_gtk_rounded_box_apply_border_radius (box, corner, junction);
}
static void
gtk_css_border_radius_grow (GtkRoundedBoxCorner *corner,
double horizontal,
double vertical)
{
if (corner->horizontal)
corner->horizontal += horizontal;
if (corner->vertical)
corner->vertical += vertical;
if (corner->horizontal <= 0 || corner->vertical <= 0)
{
corner->horizontal = 0;
corner->vertical = 0;
}
}
void
_gtk_rounded_box_grow (GtkRoundedBox *box,
double top,
double right,
double bottom,
double left)
{
if (box->box.width + left + right < 0)
{
box->box.x -= left * box->box.width / (left + right);
box->box.width = 0;
}
else
{
box->box.x -= left;
box->box.width += left + right;
}
if (box->box.height + bottom + top < 0)
{
box->box.y -= top * box->box.height / (top + bottom);
box->box.height = 0;
}
else
{
box->box.y -= top;
box->box.height += top + bottom;
}
gtk_css_border_radius_grow (&box->corner[GTK_CSS_TOP_LEFT], left, top);
gtk_css_border_radius_grow (&box->corner[GTK_CSS_TOP_RIGHT], right, top);
gtk_css_border_radius_grow (&box->corner[GTK_CSS_BOTTOM_RIGHT], right, bottom);
gtk_css_border_radius_grow (&box->corner[GTK_CSS_BOTTOM_LEFT], left, bottom);
}
void
_gtk_rounded_box_shrink (GtkRoundedBox *box,
double top,
double right,
double bottom,
double left)
{
_gtk_rounded_box_grow (box, -top, -right, -bottom, -left);
}
void
_gtk_rounded_box_move (GtkRoundedBox *box,
double dx,
double dy)
{
box->box.x += dx;
box->box.y += dy;
}
typedef struct {
double angle1;
double angle2;
gboolean negative;
} Arc;
static guint
arc_path_hash (Arc *arc)
{
return g_double_hash (&arc->angle1) ^ g_double_hash (&arc->angle2) ^ arc->negative;
}
static gboolean
arc_path_equal (Arc *arc1,
Arc *arc2)
{
return arc1->angle1 == arc2->angle1 &&
arc1->angle2 == arc2->angle2 &&
arc1->negative == arc2->negative;
}
/* We need the path to start with a line-to */
static cairo_path_t *
fixup_path (cairo_path_t *path)
{
cairo_path_data_t *data;
data = &path->data[0];
if (data->header.type == CAIRO_PATH_MOVE_TO)
data->header.type = CAIRO_PATH_LINE_TO;
return path;
}
static void
append_arc (cairo_t *cr, double angle1, double angle2, gboolean negative)
{
static GHashTable *arc_path_cache;
Arc key;
cairo_path_t *arc;
key.angle1 = angle1;
key.angle2 = angle2;
key.negative = negative;
if (arc_path_cache == NULL)
arc_path_cache = g_hash_table_new_full ((GHashFunc)arc_path_hash,
(GEqualFunc)arc_path_equal,
g_free, (GDestroyNotify)cairo_path_destroy);
arc = g_hash_table_lookup (arc_path_cache, &key);
if (arc == NULL)
{
cairo_surface_t *surface;
cairo_t *tmp;
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1);
tmp = cairo_create (surface);
if (negative)
cairo_arc_negative (tmp, 0.0, 0.0, 1.0, angle1, angle2);
else
cairo_arc (tmp, 0.0, 0.0, 1.0, angle1, angle2);
arc = fixup_path (cairo_copy_path (tmp));
g_hash_table_insert (arc_path_cache, g_memdup (&key, sizeof (key)), arc);
cairo_destroy (tmp);
cairo_surface_destroy (surface);
}
cairo_append_path (cr, arc);
}
static void
_cairo_ellipsis (cairo_t *cr,
double xc, double yc,
double xradius, double yradius,
double angle1, double angle2)
{
cairo_matrix_t save;
if (xradius <= 0.0 || yradius <= 0.0)
{
cairo_line_to (cr, xc, yc);
return;
}
cairo_get_matrix (cr, &save);
cairo_translate (cr, xc, yc);
cairo_scale (cr, xradius, yradius);
append_arc (cr, angle1, angle2, FALSE);
cairo_set_matrix (cr, &save);
}
static void
_cairo_ellipsis_negative (cairo_t *cr,
double xc, double yc,
double xradius, double yradius,
double angle1, double angle2)
{
cairo_matrix_t save;
if (xradius <= 0.0 || yradius <= 0.0)
{
cairo_line_to (cr, xc, yc);
return;
}
cairo_get_matrix (cr, &save);
cairo_translate (cr, xc, yc);
cairo_scale (cr, xradius, yradius);
append_arc (cr, angle1, angle2, TRUE);
cairo_set_matrix (cr, &save);
}
void
_gtk_rounded_box_path (const GtkRoundedBox *box,
cairo_t *cr)
{
cairo_new_sub_path (cr);
_cairo_ellipsis (cr,
box->box.x + box->corner[GTK_CSS_TOP_LEFT].horizontal,
box->box.y + box->corner[GTK_CSS_TOP_LEFT].vertical,
box->corner[GTK_CSS_TOP_LEFT].horizontal,
box->corner[GTK_CSS_TOP_LEFT].vertical,
G_PI, 3 * G_PI_2);
_cairo_ellipsis (cr,
box->box.x + box->box.width - box->corner[GTK_CSS_TOP_RIGHT].horizontal,
box->box.y + box->corner[GTK_CSS_TOP_RIGHT].vertical,
box->corner[GTK_CSS_TOP_RIGHT].horizontal,
box->corner[GTK_CSS_TOP_RIGHT].vertical,
- G_PI_2, 0);
_cairo_ellipsis (cr,
box->box.x + box->box.width - box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
box->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
0, G_PI_2);
_cairo_ellipsis (cr,
box->box.x + box->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_LEFT].vertical,
box->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
box->corner[GTK_CSS_BOTTOM_LEFT].vertical,
G_PI_2, G_PI);
cairo_close_path (cr);
}
double
_gtk_rounded_box_guess_length (const GtkRoundedBox *box,
GtkCssSide side)
{
double length;
GtkCssSide before, after;
before = side;
after = (side + 1) % 4;
if (side & 1)
length = box->box.height
- box->corner[before].vertical
- box->corner[after].vertical;
else
length = box->box.width
- box->corner[before].horizontal
- box->corner[after].horizontal;
length += G_PI * 0.125 * (box->corner[before].horizontal
+ box->corner[before].vertical
+ box->corner[after].horizontal
+ box->corner[after].vertical);
return length;
}
void
_gtk_rounded_box_path_side (const GtkRoundedBox *box,
cairo_t *cr,
GtkCssSide side)
{
switch (side)
{
case GTK_CSS_TOP:
_cairo_ellipsis (cr,
box->box.x + box->corner[GTK_CSS_TOP_LEFT].horizontal,
box->box.y + box->corner[GTK_CSS_TOP_LEFT].vertical,
box->corner[GTK_CSS_TOP_LEFT].horizontal,
box->corner[GTK_CSS_TOP_LEFT].vertical,
5 * G_PI_4, 3 * G_PI_2);
_cairo_ellipsis (cr,
box->box.x + box->box.width - box->corner[GTK_CSS_TOP_RIGHT].horizontal,
box->box.y + box->corner[GTK_CSS_TOP_RIGHT].vertical,
box->corner[GTK_CSS_TOP_RIGHT].horizontal,
box->corner[GTK_CSS_TOP_RIGHT].vertical,
- G_PI_2, -G_PI_4);
break;
case GTK_CSS_RIGHT:
_cairo_ellipsis (cr,
box->box.x + box->box.width - box->corner[GTK_CSS_TOP_RIGHT].horizontal,
box->box.y + box->corner[GTK_CSS_TOP_RIGHT].vertical,
box->corner[GTK_CSS_TOP_RIGHT].horizontal,
box->corner[GTK_CSS_TOP_RIGHT].vertical,
- G_PI_4, 0);
_cairo_ellipsis (cr,
box->box.x + box->box.width - box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
box->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
0, G_PI_4);
break;
case GTK_CSS_BOTTOM:
_cairo_ellipsis (cr,
box->box.x + box->box.width - box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
box->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
G_PI_4, G_PI_2);
_cairo_ellipsis (cr,
box->box.x + box->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_LEFT].vertical,
box->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
box->corner[GTK_CSS_BOTTOM_LEFT].vertical,
G_PI_2, 3 * G_PI_4);
break;
case GTK_CSS_LEFT:
_cairo_ellipsis (cr,
box->box.x + box->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_LEFT].vertical,
box->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
box->corner[GTK_CSS_BOTTOM_LEFT].vertical,
3 * G_PI_4, G_PI);
_cairo_ellipsis (cr,
box->box.x + box->corner[GTK_CSS_TOP_LEFT].horizontal,
box->box.y + box->corner[GTK_CSS_TOP_LEFT].vertical,
box->corner[GTK_CSS_TOP_LEFT].horizontal,
box->corner[GTK_CSS_TOP_LEFT].vertical,
G_PI, 5 * G_PI_4);
break;
default:
g_assert_not_reached ();
break;
}
}
void
_gtk_rounded_box_path_top (const GtkRoundedBox *outer,
const GtkRoundedBox *inner,
cairo_t *cr)
{
double start_angle, middle_angle, end_angle;
if (outer->box.y == inner->box.y)
return;
if (outer->box.x == inner->box.x)
start_angle = G_PI;
else
start_angle = 5 * G_PI_4;
middle_angle = 3 * G_PI_2;
if (outer->box.x + outer->box.width == inner->box.x + inner->box.width)
end_angle = 0;
else
end_angle = 7 * G_PI_4;
cairo_new_sub_path (cr);
_cairo_ellipsis (cr,
outer->box.x + outer->corner[GTK_CSS_TOP_LEFT].horizontal,
outer->box.y + outer->corner[GTK_CSS_TOP_LEFT].vertical,
outer->corner[GTK_CSS_TOP_LEFT].horizontal,
outer->corner[GTK_CSS_TOP_LEFT].vertical,
start_angle, middle_angle);
_cairo_ellipsis (cr,
outer->box.x + outer->box.width - outer->corner[GTK_CSS_TOP_RIGHT].horizontal,
outer->box.y + outer->corner[GTK_CSS_TOP_RIGHT].vertical,
outer->corner[GTK_CSS_TOP_RIGHT].horizontal,
outer->corner[GTK_CSS_TOP_RIGHT].vertical,
middle_angle, end_angle);
_cairo_ellipsis_negative (cr,
inner->box.x + inner->box.width - inner->corner[GTK_CSS_TOP_RIGHT].horizontal,
inner->box.y + inner->corner[GTK_CSS_TOP_RIGHT].vertical,
inner->corner[GTK_CSS_TOP_RIGHT].horizontal,
inner->corner[GTK_CSS_TOP_RIGHT].vertical,
end_angle, middle_angle);
_cairo_ellipsis_negative (cr,
inner->box.x + inner->corner[GTK_CSS_TOP_LEFT].horizontal,
inner->box.y + inner->corner[GTK_CSS_TOP_LEFT].vertical,
inner->corner[GTK_CSS_TOP_LEFT].horizontal,
inner->corner[GTK_CSS_TOP_LEFT].vertical,
middle_angle, start_angle);
cairo_close_path (cr);
}
void
_gtk_rounded_box_path_right (const GtkRoundedBox *outer,
const GtkRoundedBox *inner,
cairo_t *cr)
{
double start_angle, middle_angle, end_angle;
if (outer->box.x + outer->box.width == inner->box.x + inner->box.width)
return;
if (outer->box.y == inner->box.y)
start_angle = 3 * G_PI_2;
else
start_angle = 7 * G_PI_4;
middle_angle = 0;
if (outer->box.y + outer->box.height == inner->box.y + inner->box.height)
end_angle = G_PI_2;
else
end_angle = G_PI_4;
cairo_new_sub_path (cr);
_cairo_ellipsis (cr,
outer->box.x + outer->box.width - outer->corner[GTK_CSS_TOP_RIGHT].horizontal,
outer->box.y + outer->corner[GTK_CSS_TOP_RIGHT].vertical,
outer->corner[GTK_CSS_TOP_RIGHT].horizontal,
outer->corner[GTK_CSS_TOP_RIGHT].vertical,
start_angle, middle_angle);
_cairo_ellipsis (cr,
outer->box.x + outer->box.width - outer->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
outer->box.y + outer->box.height - outer->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
outer->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
outer->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
middle_angle, end_angle);
_cairo_ellipsis_negative (cr,
inner->box.x + inner->box.width - inner->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
inner->box.y + inner->box.height - inner->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
inner->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
inner->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
end_angle, middle_angle);
_cairo_ellipsis_negative (cr,
inner->box.x + inner->box.width - inner->corner[GTK_CSS_TOP_RIGHT].horizontal,
inner->box.y + inner->corner[GTK_CSS_TOP_RIGHT].vertical,
inner->corner[GTK_CSS_TOP_RIGHT].horizontal,
inner->corner[GTK_CSS_TOP_RIGHT].vertical,
middle_angle, start_angle);
cairo_close_path (cr);
}
void
_gtk_rounded_box_path_bottom (const GtkRoundedBox *outer,
const GtkRoundedBox *inner,
cairo_t *cr)
{
double start_angle, middle_angle, end_angle;
if (outer->box.y + outer->box.height == inner->box.y + inner->box.height)
return;
if (outer->box.x + outer->box.width == inner->box.x + inner->box.width)
start_angle = 0;
else
start_angle = G_PI_4;
middle_angle = G_PI_2;
if (outer->box.x == inner->box.x)
end_angle = G_PI;
else
end_angle = 3 * G_PI_4;
cairo_new_sub_path (cr);
_cairo_ellipsis (cr,
outer->box.x + outer->box.width - outer->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
outer->box.y + outer->box.height - outer->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
outer->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
outer->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
start_angle, middle_angle);
_cairo_ellipsis (cr,
outer->box.x + outer->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
outer->box.y + outer->box.height - outer->corner[GTK_CSS_BOTTOM_LEFT].vertical,
outer->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
outer->corner[GTK_CSS_BOTTOM_LEFT].vertical,
middle_angle, end_angle);
_cairo_ellipsis_negative (cr,
inner->box.x + inner->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
inner->box.y + inner->box.height - inner->corner[GTK_CSS_BOTTOM_LEFT].vertical,
inner->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
inner->corner[GTK_CSS_BOTTOM_LEFT].vertical,
end_angle, middle_angle);
_cairo_ellipsis_negative (cr,
inner->box.x + inner->box.width - inner->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
inner->box.y + inner->box.height - inner->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
inner->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
inner->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
middle_angle, start_angle);
cairo_close_path (cr);
}
void
_gtk_rounded_box_path_left (const GtkRoundedBox *outer,
const GtkRoundedBox *inner,
cairo_t *cr)
{
double start_angle, middle_angle, end_angle;
if (outer->box.x == inner->box.x)
return;
if (outer->box.y + outer->box.height == inner->box.y + inner->box.height)
start_angle = G_PI_2;
else
start_angle = 3 * G_PI_4;
middle_angle = G_PI;
if (outer->box.y == inner->box.y)
end_angle = 3 * G_PI_2;
else
end_angle = 5 * G_PI_4;
cairo_new_sub_path (cr);
_cairo_ellipsis (cr,
outer->box.x + outer->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
outer->box.y + outer->box.height - outer->corner[GTK_CSS_BOTTOM_LEFT].vertical,
outer->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
outer->corner[GTK_CSS_BOTTOM_LEFT].vertical,
start_angle, middle_angle);
_cairo_ellipsis (cr,
outer->box.x + outer->corner[GTK_CSS_TOP_LEFT].horizontal,
outer->box.y + outer->corner[GTK_CSS_TOP_LEFT].vertical,
outer->corner[GTK_CSS_TOP_LEFT].horizontal,
outer->corner[GTK_CSS_TOP_LEFT].vertical,
middle_angle, end_angle);
_cairo_ellipsis_negative (cr,
inner->box.x + inner->corner[GTK_CSS_TOP_LEFT].horizontal,
inner->box.y + inner->corner[GTK_CSS_TOP_LEFT].vertical,
inner->corner[GTK_CSS_TOP_LEFT].horizontal,
inner->corner[GTK_CSS_TOP_LEFT].vertical,
end_angle, middle_angle);
_cairo_ellipsis_negative (cr,
inner->box.x + inner->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
inner->box.y + inner->box.height - inner->corner[GTK_CSS_BOTTOM_LEFT].vertical,
inner->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
inner->corner[GTK_CSS_BOTTOM_LEFT].vertical,
middle_angle, start_angle);
cairo_close_path (cr);
}
void
_gtk_rounded_box_clip_path (const GtkRoundedBox *box,
cairo_t *cr)
{
cairo_rectangle (cr,
box->box.x, box->box.y,
box->box.width, box->box.height);
}
gboolean
_gtk_rounded_box_intersects_rectangle (const GtkRoundedBox *box,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
if (x2 < box->box.x ||
y2 < box->box.y ||
x1 >= box->box.x + box->box.width ||
y1 >= box->box.y + box->box.height)
return FALSE;
return TRUE;
}
gboolean
_gtk_rounded_box_contains_rectangle (const GtkRoundedBox *box,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
if (x1 < box->box.x ||
y1 < box->box.y ||
x2 >= box->box.x + box->box.width ||
y2 >= box->box.y + box->box.height)
return FALSE;
if (x1 < box->box.x + box->corner[GTK_CSS_TOP_LEFT].horizontal &&
y1 < box->box.y + box->corner[GTK_CSS_TOP_LEFT].vertical)
return FALSE;
if (x2 > box->box.x + box->box.width - box->corner[GTK_CSS_TOP_RIGHT].horizontal &&
y1 < box->box.y + box->corner[GTK_CSS_TOP_RIGHT].vertical)
return FALSE;
if (x2 > box->box.x + box->box.width - box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal &&
y2 > box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_RIGHT].vertical)
return FALSE;
if (x1 < box->box.x + box->corner[GTK_CSS_BOTTOM_LEFT].horizontal &&
y2 > box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_LEFT].vertical)
return FALSE;
return TRUE;
}
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