forked from AuroraMiddleware/gtk
668 lines
19 KiB
C
668 lines
19 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2010 Carlos Garnacho <carlosg@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, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkcsscolorvalueprivate.h"
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#include "gtkcssrgbavalueprivate.h"
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#include "gtkcssstylepropertyprivate.h"
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#include "gtkhslaprivate.h"
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#include "gtkprivate.h"
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#include "gtkstylepropertyprivate.h"
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#include "gdk/gdkrgbaprivate.h"
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typedef enum {
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COLOR_TYPE_LITERAL,
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COLOR_TYPE_NAME,
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COLOR_TYPE_SHADE,
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COLOR_TYPE_ALPHA,
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COLOR_TYPE_MIX,
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COLOR_TYPE_CURRENT_COLOR
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} ColorType;
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struct _GtkCssValue
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{
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GTK_CSS_VALUE_BASE
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ColorType type;
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GtkCssValue *last_value;
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union
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{
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gchar *name;
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struct
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{
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GtkCssValue *color;
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gdouble factor;
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} shade, alpha;
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struct
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{
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GtkCssValue *color1;
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GtkCssValue *color2;
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gdouble factor;
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} mix;
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} sym_col;
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};
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static void
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gtk_css_value_color_free (GtkCssValue *color)
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{
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if (color->last_value)
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_gtk_css_value_unref (color->last_value);
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switch (color->type)
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{
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case COLOR_TYPE_NAME:
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g_free (color->sym_col.name);
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break;
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case COLOR_TYPE_SHADE:
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_gtk_css_value_unref (color->sym_col.shade.color);
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break;
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case COLOR_TYPE_ALPHA:
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_gtk_css_value_unref (color->sym_col.alpha.color);
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break;
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case COLOR_TYPE_MIX:
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_gtk_css_value_unref (color->sym_col.mix.color1);
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_gtk_css_value_unref (color->sym_col.mix.color2);
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break;
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case COLOR_TYPE_LITERAL:
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case COLOR_TYPE_CURRENT_COLOR:
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default:
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break;
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}
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g_slice_free (GtkCssValue, color);
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}
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static GtkCssValue *
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gtk_css_value_color_get_fallback (guint property_id,
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GtkStyleProvider *provider,
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GtkCssStyle *style,
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GtkCssStyle *parent_style)
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{
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switch (property_id)
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{
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case GTK_CSS_PROPERTY_BACKGROUND_IMAGE:
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case GTK_CSS_PROPERTY_BORDER_IMAGE_SOURCE:
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case GTK_CSS_PROPERTY_TEXT_SHADOW:
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case GTK_CSS_PROPERTY_ICON_SHADOW:
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case GTK_CSS_PROPERTY_BOX_SHADOW:
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return _gtk_css_rgba_value_new_transparent ();
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case GTK_CSS_PROPERTY_COLOR:
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case GTK_CSS_PROPERTY_BACKGROUND_COLOR:
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case GTK_CSS_PROPERTY_BORDER_TOP_COLOR:
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case GTK_CSS_PROPERTY_BORDER_RIGHT_COLOR:
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case GTK_CSS_PROPERTY_BORDER_BOTTOM_COLOR:
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case GTK_CSS_PROPERTY_BORDER_LEFT_COLOR:
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case GTK_CSS_PROPERTY_OUTLINE_COLOR:
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case GTK_CSS_PROPERTY_CARET_COLOR:
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case GTK_CSS_PROPERTY_SECONDARY_CARET_COLOR:
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return _gtk_css_value_compute (_gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (property_id)),
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property_id,
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provider,
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style,
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parent_style);
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case GTK_CSS_PROPERTY_ICON_PALETTE:
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return _gtk_css_value_ref (gtk_css_style_get_value (style, GTK_CSS_PROPERTY_COLOR));
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default:
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if (property_id < GTK_CSS_PROPERTY_N_PROPERTIES)
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g_warning ("No fallback color defined for property '%s'",
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_gtk_style_property_get_name (GTK_STYLE_PROPERTY (_gtk_css_style_property_lookup_by_id (property_id))));
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return _gtk_css_rgba_value_new_transparent ();
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}
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}
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static GtkCssValue *
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gtk_css_value_color_compute (GtkCssValue *value,
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guint property_id,
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GtkStyleProvider *provider,
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GtkCssStyle *style,
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GtkCssStyle *parent_style)
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{
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GtkCssValue *resolved, *current;
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/* The computed value of the ‘currentColor’ keyword is the computed
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* value of the ‘color’ property. If the ‘currentColor’ keyword is
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* set on the ‘color’ property itself, it is treated as ‘color: inherit’.
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*/
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if (property_id == GTK_CSS_PROPERTY_COLOR)
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{
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if (parent_style)
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current = gtk_css_style_get_value (parent_style, GTK_CSS_PROPERTY_COLOR);
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else
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current = NULL;
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}
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else
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{
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current = gtk_css_style_get_value (style, GTK_CSS_PROPERTY_COLOR);
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}
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resolved = _gtk_css_color_value_resolve (value,
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provider,
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current,
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NULL);
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if (resolved == NULL)
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return gtk_css_value_color_get_fallback (property_id, provider, style, parent_style);
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return resolved;
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}
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static gboolean
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gtk_css_value_color_equal (const GtkCssValue *value1,
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const GtkCssValue *value2)
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{
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if (value1->type != value2->type)
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return FALSE;
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switch (value1->type)
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{
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case COLOR_TYPE_LITERAL:
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return _gtk_css_value_equal (value1->last_value, value2->last_value);
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case COLOR_TYPE_NAME:
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return g_str_equal (value1->sym_col.name, value2->sym_col.name);
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case COLOR_TYPE_SHADE:
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return value1->sym_col.shade.factor == value2->sym_col.shade.factor &&
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_gtk_css_value_equal (value1->sym_col.shade.color,
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value2->sym_col.shade.color);
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case COLOR_TYPE_ALPHA:
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return value1->sym_col.alpha.factor == value2->sym_col.alpha.factor &&
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_gtk_css_value_equal (value1->sym_col.alpha.color,
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value2->sym_col.alpha.color);
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case COLOR_TYPE_MIX:
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return value1->sym_col.mix.factor == value2->sym_col.mix.factor &&
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_gtk_css_value_equal (value1->sym_col.mix.color1,
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value2->sym_col.mix.color1) &&
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_gtk_css_value_equal (value1->sym_col.mix.color2,
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value2->sym_col.mix.color2);
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case COLOR_TYPE_CURRENT_COLOR:
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return TRUE;
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default:
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g_assert_not_reached ();
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return FALSE;
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}
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}
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static GtkCssValue *
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gtk_css_value_color_transition (GtkCssValue *start,
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GtkCssValue *end,
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guint property_id,
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double progress)
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{
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return _gtk_css_color_value_new_mix (start, end, progress);
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}
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static void
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gtk_css_value_color_print (const GtkCssValue *value,
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GString *string)
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{
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switch (value->type)
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{
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case COLOR_TYPE_LITERAL:
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_gtk_css_value_print (value->last_value, string);
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break;
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case COLOR_TYPE_NAME:
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g_string_append (string, "@");
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g_string_append (string, value->sym_col.name);
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break;
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case COLOR_TYPE_SHADE:
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{
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char factor[G_ASCII_DTOSTR_BUF_SIZE];
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g_string_append (string, "shade(");
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_gtk_css_value_print (value->sym_col.shade.color, string);
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g_string_append (string, ", ");
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g_ascii_dtostr (factor, sizeof (factor), value->sym_col.shade.factor);
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g_string_append (string, factor);
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g_string_append (string, ")");
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}
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break;
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case COLOR_TYPE_ALPHA:
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{
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char factor[G_ASCII_DTOSTR_BUF_SIZE];
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g_string_append (string, "alpha(");
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_gtk_css_value_print (value->sym_col.alpha.color, string);
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g_string_append (string, ", ");
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g_ascii_dtostr (factor, sizeof (factor), value->sym_col.alpha.factor);
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g_string_append (string, factor);
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g_string_append (string, ")");
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}
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break;
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case COLOR_TYPE_MIX:
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{
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char factor[G_ASCII_DTOSTR_BUF_SIZE];
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g_string_append (string, "mix(");
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_gtk_css_value_print (value->sym_col.mix.color1, string);
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g_string_append (string, ", ");
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_gtk_css_value_print (value->sym_col.mix.color2, string);
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g_string_append (string, ", ");
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g_ascii_dtostr (factor, sizeof (factor), value->sym_col.mix.factor);
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g_string_append (string, factor);
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g_string_append (string, ")");
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}
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break;
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case COLOR_TYPE_CURRENT_COLOR:
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g_string_append (string, "currentColor");
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break;
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default:
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g_assert_not_reached ();
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}
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}
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static const GtkCssValueClass GTK_CSS_VALUE_COLOR = {
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gtk_css_value_color_free,
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gtk_css_value_color_compute,
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gtk_css_value_color_equal,
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gtk_css_value_color_transition,
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NULL,
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NULL,
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gtk_css_value_color_print
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};
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GtkCssValue *
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_gtk_css_color_value_resolve (GtkCssValue *color,
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GtkStyleProvider *provider,
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GtkCssValue *current,
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GSList *cycle_list)
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{
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GtkCssValue *value;
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gtk_internal_return_val_if_fail (color != NULL, NULL);
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switch (color->type)
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{
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case COLOR_TYPE_LITERAL:
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return _gtk_css_value_ref (color->last_value);
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case COLOR_TYPE_NAME:
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{
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GtkCssValue *named;
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GSList cycle = { color, cycle_list };
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/* If color exists in cycle_list, we're currently resolving it.
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* So we've detected a cycle. */
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if (g_slist_find (cycle_list, color))
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return NULL;
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named = gtk_style_provider_get_color (provider, color->sym_col.name);
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if (named == NULL)
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return NULL;
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value = _gtk_css_color_value_resolve (named, provider, current, &cycle);
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if (value == NULL)
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return NULL;
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}
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break;
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case COLOR_TYPE_SHADE:
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{
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GtkCssValue *val;
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GtkHSLA hsla;
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GdkRGBA shade;
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val = _gtk_css_color_value_resolve (color->sym_col.shade.color, provider, current, cycle_list);
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if (val == NULL)
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return NULL;
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_gtk_hsla_init_from_rgba (&hsla, _gtk_css_rgba_value_get_rgba (val));
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_gtk_hsla_shade (&hsla, &hsla, color->sym_col.shade.factor);
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_gdk_rgba_init_from_hsla (&shade, &hsla);
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_gtk_css_value_unref (val);
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value = _gtk_css_rgba_value_new_from_rgba (&shade);
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}
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break;
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case COLOR_TYPE_ALPHA:
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{
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GtkCssValue *val;
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GdkRGBA alpha;
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val = _gtk_css_color_value_resolve (color->sym_col.alpha.color, provider, current, cycle_list);
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if (val == NULL)
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return NULL;
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alpha = *_gtk_css_rgba_value_get_rgba (val);
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alpha.alpha = CLAMP (alpha.alpha * color->sym_col.alpha.factor, 0, 1);
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_gtk_css_value_unref (val);
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value = _gtk_css_rgba_value_new_from_rgba (&alpha);
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}
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break;
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case COLOR_TYPE_MIX:
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{
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GtkCssValue *val;
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GdkRGBA color1, color2, res;
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val = _gtk_css_color_value_resolve (color->sym_col.mix.color1, provider, current, cycle_list);
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if (val == NULL)
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return NULL;
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color1 = *_gtk_css_rgba_value_get_rgba (val);
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_gtk_css_value_unref (val);
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val = _gtk_css_color_value_resolve (color->sym_col.mix.color2, provider, current, cycle_list);
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if (val == NULL)
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return NULL;
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color2 = *_gtk_css_rgba_value_get_rgba (val);
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_gtk_css_value_unref (val);
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res.red = CLAMP (color1.red + ((color2.red - color1.red) * color->sym_col.mix.factor), 0, 1);
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res.green = CLAMP (color1.green + ((color2.green - color1.green) * color->sym_col.mix.factor), 0, 1);
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res.blue = CLAMP (color1.blue + ((color2.blue - color1.blue) * color->sym_col.mix.factor), 0, 1);
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res.alpha = CLAMP (color1.alpha + ((color2.alpha - color1.alpha) * color->sym_col.mix.factor), 0, 1);
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value =_gtk_css_rgba_value_new_from_rgba (&res);
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}
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break;
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case COLOR_TYPE_CURRENT_COLOR:
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if (current)
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{
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return _gtk_css_value_ref (current);
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}
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else
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{
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GtkCssValue *initial = _gtk_css_style_property_get_initial_value (_gtk_css_style_property_lookup_by_id (GTK_CSS_PROPERTY_COLOR));
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if (initial->class == >K_CSS_VALUE_COLOR)
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{
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return _gtk_css_color_value_resolve (initial,
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provider,
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NULL,
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cycle_list);
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}
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else
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{
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return _gtk_css_value_ref (initial);
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}
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}
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break;
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default:
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value = NULL;
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g_assert_not_reached ();
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}
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if (color->last_value != NULL &&
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_gtk_css_value_equal (color->last_value, value))
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{
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_gtk_css_value_unref (value);
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value = _gtk_css_value_ref (color->last_value);
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}
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else
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{
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if (color->last_value != NULL)
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_gtk_css_value_unref (color->last_value);
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color->last_value = _gtk_css_value_ref (value);
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}
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return value;
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}
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GtkCssValue *
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_gtk_css_color_value_new_literal (const GdkRGBA *color)
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{
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GtkCssValue *value;
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g_return_val_if_fail (color != NULL, NULL);
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value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
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value->type = COLOR_TYPE_LITERAL;
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value->last_value = _gtk_css_rgba_value_new_from_rgba (color);
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return value;
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}
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GtkCssValue *
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_gtk_css_color_value_new_name (const gchar *name)
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{
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GtkCssValue *value;
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gtk_internal_return_val_if_fail (name != NULL, NULL);
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value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
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value->type = COLOR_TYPE_NAME;
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value->sym_col.name = g_strdup (name);
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return value;
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}
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GtkCssValue *
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_gtk_css_color_value_new_shade (GtkCssValue *color,
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gdouble factor)
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{
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GtkCssValue *value;
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gtk_internal_return_val_if_fail (color->class == >K_CSS_VALUE_COLOR, NULL);
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value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
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value->type = COLOR_TYPE_SHADE;
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value->sym_col.shade.color = _gtk_css_value_ref (color);
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value->sym_col.shade.factor = factor;
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return value;
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}
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GtkCssValue *
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_gtk_css_color_value_new_alpha (GtkCssValue *color,
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gdouble factor)
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{
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GtkCssValue *value;
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gtk_internal_return_val_if_fail (color->class == >K_CSS_VALUE_COLOR, NULL);
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value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
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value->type = COLOR_TYPE_ALPHA;
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value->sym_col.alpha.color = _gtk_css_value_ref (color);
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value->sym_col.alpha.factor = factor;
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return value;
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}
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GtkCssValue *
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_gtk_css_color_value_new_mix (GtkCssValue *color1,
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GtkCssValue *color2,
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gdouble factor)
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{
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GtkCssValue *value;
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gtk_internal_return_val_if_fail (color1->class == >K_CSS_VALUE_COLOR, NULL);
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gtk_internal_return_val_if_fail (color2->class == >K_CSS_VALUE_COLOR, NULL);
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value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_COLOR);
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value->type = COLOR_TYPE_MIX;
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value->sym_col.mix.color1 = _gtk_css_value_ref (color1);
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value->sym_col.mix.color2 = _gtk_css_value_ref (color2);
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value->sym_col.mix.factor = factor;
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||
return value;
|
||
}
|
||
|
||
GtkCssValue *
|
||
_gtk_css_color_value_new_current_color (void)
|
||
{
|
||
static GtkCssValue current_color = { >K_CSS_VALUE_COLOR, 1, COLOR_TYPE_CURRENT_COLOR, NULL, };
|
||
|
||
return _gtk_css_value_ref (¤t_color);
|
||
}
|
||
|
||
typedef struct
|
||
{
|
||
GtkCssValue *color;
|
||
GtkCssValue *color2;
|
||
double value;
|
||
} ColorFunctionData;
|
||
|
||
static guint
|
||
parse_color_mix (GtkCssParser *parser,
|
||
guint arg,
|
||
gpointer data_)
|
||
{
|
||
ColorFunctionData *data = data_;
|
||
|
||
switch (arg)
|
||
{
|
||
case 0:
|
||
data->color = _gtk_css_color_value_parse (parser);
|
||
if (data->color == NULL)
|
||
return 0;
|
||
return 1;
|
||
|
||
case 1:
|
||
data->color2 = _gtk_css_color_value_parse (parser);
|
||
if (data->color2 == NULL)
|
||
return 0;
|
||
return 1;
|
||
|
||
case 2:
|
||
if (!gtk_css_parser_consume_number (parser, &data->value))
|
||
return 0;
|
||
return 1;
|
||
|
||
default:
|
||
g_return_val_if_reached (0);
|
||
}
|
||
}
|
||
|
||
static guint
|
||
parse_color_number (GtkCssParser *parser,
|
||
guint arg,
|
||
gpointer data_)
|
||
{
|
||
ColorFunctionData *data = data_;
|
||
|
||
switch (arg)
|
||
{
|
||
case 0:
|
||
data->color = _gtk_css_color_value_parse (parser);
|
||
if (data->color == NULL)
|
||
return 0;
|
||
return 1;
|
||
|
||
case 1:
|
||
if (!gtk_css_parser_consume_number (parser, &data->value))
|
||
return 0;
|
||
return 1;
|
||
|
||
default:
|
||
g_return_val_if_reached (0);
|
||
}
|
||
}
|
||
|
||
gboolean
|
||
gtk_css_color_value_can_parse (GtkCssParser *parser)
|
||
{
|
||
/* This is way too generous, but meh... */
|
||
return gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_IDENT)
|
||
|| gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_AT_KEYWORD)
|
||
|| gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_HASH_ID)
|
||
|| gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_HASH_UNRESTRICTED)
|
||
|| gtk_css_parser_has_function (parser, "lighter")
|
||
|| gtk_css_parser_has_function (parser, "darker")
|
||
|| gtk_css_parser_has_function (parser, "shade")
|
||
|| gtk_css_parser_has_function (parser, "alpha")
|
||
|| gtk_css_parser_has_function (parser, "mix")
|
||
|| gtk_css_parser_has_function (parser, "rgb")
|
||
|| gtk_css_parser_has_function (parser, "rgba");
|
||
}
|
||
|
||
GtkCssValue *
|
||
_gtk_css_color_value_parse (GtkCssParser *parser)
|
||
{
|
||
ColorFunctionData data = { NULL, };
|
||
GtkCssValue *value;
|
||
GdkRGBA rgba;
|
||
|
||
if (gtk_css_parser_try_ident (parser, "currentColor"))
|
||
{
|
||
return _gtk_css_color_value_new_current_color ();
|
||
}
|
||
else if (gtk_css_parser_has_token (parser, GTK_CSS_TOKEN_AT_KEYWORD))
|
||
{
|
||
const GtkCssToken *token = gtk_css_parser_get_token (parser);
|
||
|
||
value = _gtk_css_color_value_new_name (token->string.string);
|
||
gtk_css_parser_consume_token (parser);
|
||
|
||
return value;
|
||
}
|
||
else if (gtk_css_parser_has_function (parser, "lighter"))
|
||
{
|
||
if (gtk_css_parser_consume_function (parser, 1, 1, parse_color_number, &data))
|
||
value = _gtk_css_color_value_new_shade (data.color, 1.3);
|
||
else
|
||
value = NULL;
|
||
|
||
g_clear_pointer (&data.color, gtk_css_value_unref);
|
||
return value;
|
||
}
|
||
else if (gtk_css_parser_has_function (parser, "darker"))
|
||
{
|
||
if (gtk_css_parser_consume_function (parser, 1, 1, parse_color_number, &data))
|
||
value = _gtk_css_color_value_new_shade (data.color, 0.7);
|
||
else
|
||
value = NULL;
|
||
|
||
g_clear_pointer (&data.color, gtk_css_value_unref);
|
||
return value;
|
||
}
|
||
else if (gtk_css_parser_has_function (parser, "shade"))
|
||
{
|
||
if (gtk_css_parser_consume_function (parser, 2, 2, parse_color_number, &data))
|
||
value = _gtk_css_color_value_new_shade (data.color, data.value);
|
||
else
|
||
value = NULL;
|
||
|
||
g_clear_pointer (&data.color, gtk_css_value_unref);
|
||
return value;
|
||
}
|
||
else if (gtk_css_parser_has_function (parser, "alpha"))
|
||
{
|
||
if (gtk_css_parser_consume_function (parser, 2, 2, parse_color_number, &data))
|
||
value = _gtk_css_color_value_new_alpha (data.color, data.value);
|
||
else
|
||
value = NULL;
|
||
|
||
g_clear_pointer (&data.color, gtk_css_value_unref);
|
||
return value;
|
||
}
|
||
else if (gtk_css_parser_has_function (parser, "mix"))
|
||
{
|
||
if (gtk_css_parser_consume_function (parser, 3, 3, parse_color_mix, &data))
|
||
value = _gtk_css_color_value_new_mix (data.color, data.color2, data.value);
|
||
else
|
||
value = NULL;
|
||
|
||
g_clear_pointer (&data.color, gtk_css_value_unref);
|
||
g_clear_pointer (&data.color2, gtk_css_value_unref);
|
||
return value;
|
||
}
|
||
|
||
if (gdk_rgba_parser_parse (parser, &rgba))
|
||
return _gtk_css_color_value_new_literal (&rgba);
|
||
else
|
||
return NULL;
|
||
}
|
||
|