forked from AuroraMiddleware/gtk
500 lines
20 KiB
C
500 lines
20 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2011 Benjamin Otte <otte@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include "gtkroundedboxprivate.h"
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#include <string.h>
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/**
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* _gtk_rounded_box_init_rect:
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* @box: box to initialize
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* @x: x coordinate of box
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* @y: y coordinate of box
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* @width: width of box
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* @height: height of box
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*
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* Initializes the given @box to represent the given rectangle.
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* The
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**/
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void
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_gtk_rounded_box_init_rect (GtkRoundedBox *box,
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double x,
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double y,
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double width,
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double height)
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{
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memset (box, 0, sizeof (GtkRoundedBox));
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box->box.x = x;
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box->box.y = y;
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box->box.width = width;
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box->box.height = height;
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}
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/* clamp border radius, following CSS specs */
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static void
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gtk_rounded_box_clamp_border_radius (GtkRoundedBox *box)
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{
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gdouble factor = 1.0;
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/* note: division by zero leads to +INF, which is > factor, so will be ignored */
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factor = MIN (factor, box->box.width / (box->corner[GTK_CSS_TOP_LEFT].horizontal +
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box->corner[GTK_CSS_TOP_RIGHT].horizontal));
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factor = MIN (factor, box->box.height / (box->corner[GTK_CSS_TOP_RIGHT].vertical +
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box->corner[GTK_CSS_BOTTOM_RIGHT].vertical));
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factor = MIN (factor, box->box.width / (box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal +
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box->corner[GTK_CSS_BOTTOM_LEFT].horizontal));
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factor = MIN (factor, box->box.height / (box->corner[GTK_CSS_TOP_LEFT].vertical +
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box->corner[GTK_CSS_BOTTOM_LEFT].vertical));
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box->corner[GTK_CSS_TOP_LEFT].horizontal *= factor;
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box->corner[GTK_CSS_TOP_LEFT].vertical *= factor;
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box->corner[GTK_CSS_TOP_RIGHT].horizontal *= factor;
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box->corner[GTK_CSS_TOP_RIGHT].vertical *= factor;
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box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal *= factor;
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box->corner[GTK_CSS_BOTTOM_RIGHT].vertical *= factor;
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box->corner[GTK_CSS_BOTTOM_LEFT].horizontal *= factor;
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box->corner[GTK_CSS_BOTTOM_LEFT].vertical *= factor;
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}
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void
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_gtk_rounded_box_apply_border_radius (GtkRoundedBox *box,
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GtkThemingEngine *engine,
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GtkStateFlags state,
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GtkJunctionSides junction)
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{
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GtkCssBorderCornerRadius *corner[4];
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guint i;
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gtk_theming_engine_get (engine, state,
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/* Can't use border-radius as it's an int for
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* backwards compat */
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"border-top-left-radius", &corner[GTK_CSS_TOP_LEFT],
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"border-top-right-radius", &corner[GTK_CSS_TOP_RIGHT],
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"border-bottom-right-radius", &corner[GTK_CSS_BOTTOM_RIGHT],
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"border-bottom-left-radius", &corner[GTK_CSS_BOTTOM_LEFT],
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NULL);
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if (corner[GTK_CSS_TOP_LEFT] && (junction & GTK_JUNCTION_CORNER_TOPLEFT) == 0)
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box->corner[GTK_CSS_TOP_LEFT] = *corner[GTK_CSS_TOP_LEFT];
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if (corner[GTK_CSS_TOP_RIGHT] && (junction & GTK_JUNCTION_CORNER_TOPRIGHT) == 0)
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box->corner[GTK_CSS_TOP_RIGHT] = *corner[GTK_CSS_TOP_RIGHT];
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if (corner[GTK_CSS_BOTTOM_RIGHT] && (junction & GTK_JUNCTION_CORNER_BOTTOMRIGHT) == 0)
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box->corner[GTK_CSS_BOTTOM_RIGHT] = *corner[GTK_CSS_BOTTOM_RIGHT];
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if (corner[GTK_CSS_BOTTOM_LEFT] && (junction & GTK_JUNCTION_CORNER_BOTTOMLEFT) == 0)
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box->corner[GTK_CSS_BOTTOM_LEFT] = *corner[GTK_CSS_BOTTOM_LEFT];
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gtk_rounded_box_clamp_border_radius (box);
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for (i = 0; i < 4; i++)
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g_free (corner[i]);
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}
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static void
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gtk_css_border_radius_grow (GtkCssBorderCornerRadius *corner,
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double horizontal,
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double vertical)
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{
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corner->horizontal += horizontal;
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corner->vertical += vertical;
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if (corner->horizontal <= 0 || corner->vertical <= 0)
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{
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corner->horizontal = 0;
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corner->vertical = 0;
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}
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}
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void
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_gtk_rounded_box_grow (GtkRoundedBox *box,
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double top,
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double right,
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double bottom,
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double left)
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{
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if (box->box.width + left + right < 0)
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{
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box->box.x -= left * box->box.width / (left + right);
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box->box.width = 0;
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}
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else
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{
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box->box.x -= left;
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box->box.width += left + right;
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}
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if (box->box.height + bottom + right < 0)
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{
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box->box.y -= top * box->box.height / (top + bottom);
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box->box.height = 0;
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}
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else
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{
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box->box.y -= top;
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box->box.height += top + bottom;
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}
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gtk_css_border_radius_grow (&box->corner[GTK_CSS_TOP_LEFT], left, top);
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gtk_css_border_radius_grow (&box->corner[GTK_CSS_TOP_RIGHT], right, bottom);
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gtk_css_border_radius_grow (&box->corner[GTK_CSS_BOTTOM_RIGHT], right, top);
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gtk_css_border_radius_grow (&box->corner[GTK_CSS_BOTTOM_LEFT], left, bottom);
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}
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void
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_gtk_rounded_box_shrink (GtkRoundedBox *box,
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double top,
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double right,
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double bottom,
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double left)
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{
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_gtk_rounded_box_grow (box, -top, -right, -bottom, -left);
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}
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void
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_gtk_rounded_box_move (GtkRoundedBox *box,
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double dx,
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double dy)
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{
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box->box.x += dx;
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box->box.y += dy;
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}
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static void
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_cairo_ellipsis (cairo_t *cr,
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double xc, double yc,
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double xradius, double yradius,
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double angle1, double angle2)
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{
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if (xradius <= 0.0 || yradius <= 0.0)
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{
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cairo_line_to (cr, xc, yc);
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return;
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}
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cairo_save (cr);
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cairo_translate (cr, xc, yc);
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cairo_scale (cr, xradius, yradius);
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cairo_arc (cr, 0, 0, 1.0, angle1, angle2);
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cairo_restore (cr);
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}
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static void
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_cairo_ellipsis_negative (cairo_t *cr,
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double xc, double yc,
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double xradius, double yradius,
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double angle1, double angle2)
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{
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if (xradius <= 0.0 || yradius <= 0.0)
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{
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cairo_line_to (cr, xc, yc);
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return;
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}
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cairo_save (cr);
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cairo_translate (cr, xc, yc);
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cairo_scale (cr, xradius, yradius);
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cairo_arc_negative (cr, 0, 0, 1.0, angle1, angle2);
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cairo_restore (cr);
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}
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void
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_gtk_rounded_box_path (const GtkRoundedBox *box,
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cairo_t *cr)
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{
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cairo_new_sub_path (cr);
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_cairo_ellipsis (cr,
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box->box.x + box->corner[GTK_CSS_TOP_LEFT].horizontal,
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box->box.y + box->corner[GTK_CSS_TOP_LEFT].vertical,
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box->corner[GTK_CSS_TOP_LEFT].horizontal,
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box->corner[GTK_CSS_TOP_LEFT].vertical,
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G_PI, 3 * G_PI / 2);
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_cairo_ellipsis (cr,
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box->box.x + box->box.width - box->corner[GTK_CSS_TOP_RIGHT].horizontal,
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box->box.y + box->corner[GTK_CSS_TOP_RIGHT].vertical,
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box->corner[GTK_CSS_TOP_RIGHT].horizontal,
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box->corner[GTK_CSS_TOP_RIGHT].vertical,
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- G_PI / 2, 0);
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_cairo_ellipsis (cr,
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box->box.x + box->box.width - box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
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box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
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box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
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box->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
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0, G_PI / 2);
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_cairo_ellipsis (cr,
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box->box.x + box->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
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box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_LEFT].vertical,
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box->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
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box->corner[GTK_CSS_BOTTOM_LEFT].vertical,
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G_PI / 2, G_PI);
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cairo_close_path (cr);
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}
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double
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_gtk_rounded_box_guess_length (const GtkRoundedBox *box,
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GtkCssSide side)
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{
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double length;
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GtkCssCorner before, after;
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before = side;
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after = (side + 1) % 4;
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if (side & 1)
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length = box->box.height
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- box->corner[before].vertical
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- box->corner[after].vertical;
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else
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length = box->box.width
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- box->corner[before].horizontal
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- box->corner[after].horizontal;
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length += G_PI * 0.125 * (box->corner[before].horizontal
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+ box->corner[before].vertical
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+ box->corner[after].horizontal
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+ box->corner[after].vertical);
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return length;
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}
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void
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_gtk_rounded_box_path_side (const GtkRoundedBox *box,
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cairo_t *cr,
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GtkCssSide side)
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{
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switch (side)
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{
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case GTK_CSS_TOP:
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_cairo_ellipsis (cr,
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box->box.x + box->corner[GTK_CSS_TOP_LEFT].horizontal,
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box->box.y + box->corner[GTK_CSS_TOP_LEFT].vertical,
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box->corner[GTK_CSS_TOP_LEFT].horizontal,
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box->corner[GTK_CSS_TOP_LEFT].vertical,
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5 * G_PI / 4, 3 * G_PI / 2);
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_cairo_ellipsis (cr,
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box->box.x + box->box.width - box->corner[GTK_CSS_TOP_RIGHT].horizontal,
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box->box.y + box->corner[GTK_CSS_TOP_RIGHT].vertical,
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box->corner[GTK_CSS_TOP_RIGHT].horizontal,
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box->corner[GTK_CSS_TOP_RIGHT].vertical,
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- G_PI / 2, -G_PI / 4);
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break;
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case GTK_CSS_RIGHT:
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_cairo_ellipsis (cr,
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box->box.x + box->box.width - box->corner[GTK_CSS_TOP_RIGHT].horizontal,
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box->box.y + box->corner[GTK_CSS_TOP_RIGHT].vertical,
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box->corner[GTK_CSS_TOP_RIGHT].horizontal,
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box->corner[GTK_CSS_TOP_RIGHT].vertical,
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- G_PI / 4, 0);
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_cairo_ellipsis (cr,
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box->box.x + box->box.width - box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
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box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
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box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
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box->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
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0, G_PI / 4);
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break;
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case GTK_CSS_BOTTOM:
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_cairo_ellipsis (cr,
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box->box.x + box->box.width - box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
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box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
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box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
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box->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
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G_PI / 4, G_PI / 2);
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_cairo_ellipsis (cr,
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box->box.x + box->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
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box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_LEFT].vertical,
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box->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
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box->corner[GTK_CSS_BOTTOM_LEFT].vertical,
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G_PI / 2, 3 * G_PI / 4);
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break;
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case GTK_CSS_LEFT:
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_cairo_ellipsis (cr,
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box->box.x + box->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
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box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_LEFT].vertical,
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box->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
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box->corner[GTK_CSS_BOTTOM_LEFT].vertical,
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3 * G_PI / 4, G_PI);
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_cairo_ellipsis (cr,
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box->box.x + box->corner[GTK_CSS_TOP_LEFT].horizontal,
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box->box.y + box->corner[GTK_CSS_TOP_LEFT].vertical,
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box->corner[GTK_CSS_TOP_LEFT].horizontal,
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box->corner[GTK_CSS_TOP_LEFT].vertical,
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G_PI, 5 * G_PI / 4);
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break;
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default:
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g_assert_not_reached ();
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break;
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}
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}
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void
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_gtk_rounded_box_path_top (const GtkRoundedBox *outer,
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const GtkRoundedBox *inner,
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cairo_t *cr)
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{
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cairo_new_sub_path (cr);
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_cairo_ellipsis (cr,
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outer->box.x + outer->corner[GTK_CSS_TOP_LEFT].horizontal,
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outer->box.y + outer->corner[GTK_CSS_TOP_LEFT].vertical,
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outer->corner[GTK_CSS_TOP_LEFT].horizontal,
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outer->corner[GTK_CSS_TOP_LEFT].vertical,
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5 * G_PI / 4, 3 * G_PI / 2);
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_cairo_ellipsis (cr,
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outer->box.x + outer->box.width - outer->corner[GTK_CSS_TOP_RIGHT].horizontal,
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outer->box.y + outer->corner[GTK_CSS_TOP_RIGHT].vertical,
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outer->corner[GTK_CSS_TOP_RIGHT].horizontal,
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outer->corner[GTK_CSS_TOP_RIGHT].vertical,
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- G_PI / 2, -G_PI / 4);
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_cairo_ellipsis_negative (cr,
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inner->box.x + inner->box.width - inner->corner[GTK_CSS_TOP_RIGHT].horizontal,
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inner->box.y + inner->corner[GTK_CSS_TOP_RIGHT].vertical,
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inner->corner[GTK_CSS_TOP_RIGHT].horizontal,
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inner->corner[GTK_CSS_TOP_RIGHT].vertical,
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-G_PI / 4, - G_PI / 2);
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_cairo_ellipsis_negative (cr,
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inner->box.x + inner->corner[GTK_CSS_TOP_LEFT].horizontal,
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inner->box.y + inner->corner[GTK_CSS_TOP_LEFT].vertical,
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inner->corner[GTK_CSS_TOP_LEFT].horizontal,
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inner->corner[GTK_CSS_TOP_LEFT].vertical,
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3 * G_PI / 2, 5 * G_PI / 4);
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cairo_close_path (cr);
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}
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void
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_gtk_rounded_box_path_right (const GtkRoundedBox *outer,
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const GtkRoundedBox *inner,
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cairo_t *cr)
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{
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cairo_new_sub_path (cr);
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_cairo_ellipsis (cr,
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outer->box.x + outer->box.width - outer->corner[GTK_CSS_TOP_RIGHT].horizontal,
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outer->box.y + outer->corner[GTK_CSS_TOP_RIGHT].vertical,
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outer->corner[GTK_CSS_TOP_RIGHT].horizontal,
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outer->corner[GTK_CSS_TOP_RIGHT].vertical,
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- G_PI / 4, 0);
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_cairo_ellipsis (cr,
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outer->box.x + outer->box.width - outer->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
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outer->box.y + outer->box.height - outer->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
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outer->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
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outer->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
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0, G_PI / 4);
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_cairo_ellipsis_negative (cr,
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inner->box.x + inner->box.width - inner->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
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inner->box.y + inner->box.height - inner->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
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inner->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
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inner->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
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G_PI / 4, 0);
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_cairo_ellipsis_negative (cr,
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inner->box.x + inner->box.width - inner->corner[GTK_CSS_TOP_RIGHT].horizontal,
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inner->box.y + inner->corner[GTK_CSS_TOP_RIGHT].vertical,
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inner->corner[GTK_CSS_TOP_RIGHT].horizontal,
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inner->corner[GTK_CSS_TOP_RIGHT].vertical,
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0, - G_PI / 4);
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cairo_close_path (cr);
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}
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void
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_gtk_rounded_box_path_bottom (const GtkRoundedBox *outer,
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const GtkRoundedBox *inner,
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cairo_t *cr)
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{
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cairo_new_sub_path (cr);
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_cairo_ellipsis (cr,
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outer->box.x + outer->box.width - outer->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
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outer->box.y + outer->box.height - outer->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
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outer->corner[GTK_CSS_BOTTOM_RIGHT].horizontal,
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outer->corner[GTK_CSS_BOTTOM_RIGHT].vertical,
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G_PI / 4, G_PI / 2);
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_cairo_ellipsis (cr,
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outer->box.x + outer->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
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outer->box.y + outer->box.height - outer->corner[GTK_CSS_BOTTOM_LEFT].vertical,
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outer->corner[GTK_CSS_BOTTOM_LEFT].horizontal,
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outer->corner[GTK_CSS_BOTTOM_LEFT].vertical,
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G_PI / 2, 3 * G_PI / 4);
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_cairo_ellipsis_negative (cr,
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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);
|
|
}
|
|
|