/* GTK - The GIMP Toolkit * Copyright (C) 2011 Benjamin Otte * * 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 . */ #include "config.h" #include "gtkroundedboxprivate.h" #include "gtkcsscornervalueprivate.h" #include "gtkcsstypesprivate.h" #include "gtkstylecontextprivate.h" #include "gtkthemingengineprivate.h" #include /** * _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_border_radius_for_engine (GtkRoundedBox *box, GtkThemingEngine *engine, GtkJunctionSides junction) { _gtk_rounded_box_apply_border_radius_for_context (box, _gtk_theming_engine_get_context (engine), 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); }