gtk2/gtk/gtkroundedbox.c
Benjamin Otte 04bf3d1e1f roundedbox: Remove functions that take a GtkThemingEngine
Instead, make the functions use a GtkStyleContext argument.
2014-08-16 19:39:44 +02:00

537 lines
22 KiB
C

/* 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;
/* note: division by zero leads to +INF, which is > factor, so will be ignored */
factor = MIN (factor, box->box.width / (box->corner[GTK_CSS_TOP_LEFT].horizontal +
box->corner[GTK_CSS_TOP_RIGHT].horizontal));
factor = MIN (factor, box->box.height / (box->corner[GTK_CSS_TOP_RIGHT].vertical +
box->corner[GTK_CSS_BOTTOM_RIGHT].vertical));
factor = MIN (factor, box->box.width / (box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal +
box->corner[GTK_CSS_BOTTOM_LEFT].horizontal));
factor = MIN (factor, box->box.height / (box->corner[GTK_CSS_TOP_LEFT].vertical +
box->corner[GTK_CSS_BOTTOM_LEFT].vertical));
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_context (GtkRoundedBox *box,
GtkStyleContext *context,
GtkJunctionSides junction)
{
GtkCssValue *corner[4];
corner[GTK_CSS_TOP_LEFT] = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_TOP_LEFT_RADIUS);
corner[GTK_CSS_TOP_RIGHT] = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_TOP_RIGHT_RADIUS);
corner[GTK_CSS_BOTTOM_LEFT] = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_BOTTOM_LEFT_RADIUS);
corner[GTK_CSS_BOTTOM_RIGHT] = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_BORDER_BOTTOM_RIGHT_RADIUS);
_gtk_rounded_box_apply_border_radius (box, corner, junction);
}
void
_gtk_rounded_box_apply_outline_radius_for_context (GtkRoundedBox *box,
GtkStyleContext *context,
GtkJunctionSides junction)
{
GtkCssValue *corner[4];
corner[GTK_CSS_TOP_LEFT] = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_OUTLINE_TOP_LEFT_RADIUS);
corner[GTK_CSS_TOP_RIGHT] = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_OUTLINE_TOP_RIGHT_RADIUS);
corner[GTK_CSS_BOTTOM_LEFT] = _gtk_style_context_peek_property (context, GTK_CSS_PROPERTY_OUTLINE_BOTTOM_LEFT_RADIUS);
corner[GTK_CSS_BOTTOM_RIGHT] = _gtk_style_context_peek_property (context, 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)
{
corner->horizontal += horizontal;
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, bottom);
gtk_css_border_radius_grow (&box->corner[GTK_CSS_BOTTOM_RIGHT], right, top);
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;
}
static void
_cairo_ellipsis (cairo_t *cr,
double xc, double yc,
double xradius, double yradius,
double angle1, double angle2)
{
if (xradius <= 0.0 || yradius <= 0.0)
{
cairo_line_to (cr, xc, yc);
return;
}
cairo_save (cr);
cairo_translate (cr, xc, yc);
cairo_scale (cr, xradius, yradius);
cairo_arc (cr, 0, 0, 1.0, angle1, angle2);
cairo_restore (cr);
}
static void
_cairo_ellipsis_negative (cairo_t *cr,
double xc, double yc,
double xradius, double yradius,
double angle1, double angle2)
{
if (xradius <= 0.0 || yradius <= 0.0)
{
cairo_line_to (cr, xc, yc);
return;
}
cairo_save (cr);
cairo_translate (cr, xc, yc);
cairo_scale (cr, xradius, yradius);
cairo_arc_negative (cr, 0, 0, 1.0, angle1, angle2);
cairo_restore (cr);
}
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)
{
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,
5 * G_PI / 4, 3 * G_PI / 2);
_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,
- G_PI / 2, -G_PI / 4);
_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,
-G_PI / 4, - G_PI / 2);
_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,
3 * G_PI / 2, 5 * G_PI / 4);
cairo_close_path (cr);
}
void
_gtk_rounded_box_path_right (const GtkRoundedBox *outer,
const GtkRoundedBox *inner,
cairo_t *cr)
{
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,
- G_PI / 4, 0);
_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,
0, G_PI / 4);
_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,
G_PI / 4, 0);
_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,
0, - G_PI / 4);
cairo_close_path (cr);
}
void
_gtk_rounded_box_path_bottom (const GtkRoundedBox *outer,
const GtkRoundedBox *inner,
cairo_t *cr)
{
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,
G_PI / 4, G_PI / 2);
_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,
G_PI / 2, 3 * G_PI / 4);
_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,
3 * G_PI / 4, G_PI / 2);
_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,
G_PI / 2, G_PI / 4);
cairo_close_path (cr);
}
void
_gtk_rounded_box_path_left (const GtkRoundedBox *outer,
const GtkRoundedBox *inner,
cairo_t *cr)
{
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,
3 * G_PI / 4, G_PI);
_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,
G_PI, 5 * G_PI / 4);
_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,
5 * G_PI / 4, G_PI);
_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,
G_PI, 3 * G_PI / 4);
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);
}