forked from AuroraMiddleware/gtk
3322599e99
Dynamic values are values that change their contents with the current (monotonic) time. This just introduces the GtkCssValue API for it.
262 lines
7.2 KiB
C
262 lines
7.2 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2011 Red Hat, Inc.
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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 "gtkcsspalettevalueprivate.h"
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#include "gtkcssiconthemevalueprivate.h"
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#include "gtkcsscolorvalueprivate.h"
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#include "gtkcssrgbavalueprivate.h"
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struct _GtkCssValue {
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GTK_CSS_VALUE_BASE
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GHashTable *colors;
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};
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static GtkCssValue *default_palette;
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static GtkCssValue *gtk_css_palette_value_new_empty (void);
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static void
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gtk_css_palette_value_add_color (GtkCssValue *value,
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const char *name,
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GtkCssValue *color)
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{
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g_hash_table_insert (value->colors, g_strdup (name), color);
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}
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static void
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gtk_css_value_palette_free (GtkCssValue *value)
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{
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g_hash_table_unref (value->colors);
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g_slice_free (GtkCssValue, value);
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}
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static GtkCssValue *
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gtk_css_value_palette_compute (GtkCssValue *specified,
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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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GHashTableIter iter;
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gpointer name, value;
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GtkCssValue *computed_color;
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GtkCssValue *result;
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gboolean changes = FALSE;
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result = gtk_css_palette_value_new_empty ();
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g_hash_table_iter_init (&iter, specified->colors);
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while (g_hash_table_iter_next (&iter, &name, &value))
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{
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computed_color = _gtk_css_value_compute (value, property_id, provider, style, parent_style);
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changes |= computed_color != value;
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gtk_css_palette_value_add_color (result, name, computed_color);
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}
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if (!changes)
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{
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_gtk_css_value_unref (result);
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result = _gtk_css_value_ref (specified);
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}
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return result;
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}
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static gboolean
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gtk_css_value_palette_equal (const GtkCssValue *value1,
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const GtkCssValue *value2)
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{
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gpointer name, color1, color2;
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GHashTableIter iter;
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if (g_hash_table_size (value1->colors) != g_hash_table_size (value2->colors))
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return FALSE;
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g_hash_table_iter_init (&iter, value1->colors);
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while (g_hash_table_iter_next (&iter, &name, &color1))
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{
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color2 = g_hash_table_lookup (value2->colors, name);
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if (color2 == NULL)
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return FALSE;
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if (!_gtk_css_value_equal (color1, color2))
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return FALSE;
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}
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return TRUE;
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}
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static GtkCssValue *
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gtk_css_value_palette_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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gpointer name, start_color, end_color;
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GHashTableIter iter;
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GtkCssValue *result, *transition;
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/* XXX: For colors that are only in start or end but not both,
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* we don't transition but just keep the value.
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* That causes an abrupt transition to currentColor at the end.
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*/
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result = gtk_css_palette_value_new_empty ();
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g_hash_table_iter_init (&iter, start->colors);
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while (g_hash_table_iter_next (&iter, &name, &start_color))
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{
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end_color = g_hash_table_lookup (end->colors, name);
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if (end_color == NULL)
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transition = _gtk_css_value_ref (start_color);
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else
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transition = _gtk_css_value_transition (start_color, end_color, property_id, progress);
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gtk_css_palette_value_add_color (result, name, transition);
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}
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g_hash_table_iter_init (&iter, end->colors);
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while (g_hash_table_iter_next (&iter, &name, &end_color))
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{
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start_color = g_hash_table_lookup (start->colors, name);
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if (start_color != NULL)
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continue;
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gtk_css_palette_value_add_color (result, name, _gtk_css_value_ref (end_color));
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}
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return result;
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}
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static void
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gtk_css_value_palette_print (const GtkCssValue *value,
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GString *string)
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{
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GHashTableIter iter;
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gpointer name, color;
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gboolean first = TRUE;
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if (value == default_palette)
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{
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g_string_append (string, "default");
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return;
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}
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g_hash_table_iter_init (&iter, value->colors);
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while (g_hash_table_iter_next (&iter, &name, &color))
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{
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if (first)
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first = FALSE;
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else
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g_string_append (string, ", ");
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g_string_append (string, name);
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g_string_append_c (string, ' ');
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_gtk_css_value_print (color, string);
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}
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}
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static const GtkCssValueClass GTK_CSS_VALUE_PALETTE = {
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gtk_css_value_palette_free,
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gtk_css_value_palette_compute,
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gtk_css_value_palette_equal,
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gtk_css_value_palette_transition,
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NULL,
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NULL,
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gtk_css_value_palette_print
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};
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static GtkCssValue *
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gtk_css_palette_value_new_empty (void)
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{
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GtkCssValue *result;
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result = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_PALETTE);
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result->colors = g_hash_table_new_full (g_str_hash, g_str_equal,
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g_free,
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(GDestroyNotify) _gtk_css_value_unref);
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return result;
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}
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GtkCssValue *
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gtk_css_palette_value_new_default (void)
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{
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if (default_palette == NULL)
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{
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default_palette = gtk_css_palette_value_new_empty ();
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gtk_css_palette_value_add_color (default_palette, "error", _gtk_css_color_value_new_name ("error_color"));
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gtk_css_palette_value_add_color (default_palette, "warning", _gtk_css_color_value_new_name ("warning_color"));
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gtk_css_palette_value_add_color (default_palette, "success", _gtk_css_color_value_new_name ("success_color"));
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}
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return _gtk_css_value_ref (default_palette);
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}
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GtkCssValue *
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gtk_css_palette_value_parse (GtkCssParser *parser)
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{
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GtkCssValue *result, *color;
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char *ident;
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if (_gtk_css_parser_try (parser, "default", TRUE))
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return gtk_css_palette_value_new_default ();
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result = gtk_css_palette_value_new_empty ();
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do {
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ident = _gtk_css_parser_try_ident (parser, TRUE);
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if (ident == NULL)
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{
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_gtk_css_parser_error (parser, "expected color name");
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_gtk_css_value_unref (result);
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return NULL;
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}
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color = _gtk_css_color_value_parse (parser);
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if (color == NULL)
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{
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g_free (ident);
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_gtk_css_value_unref (result);
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return NULL;
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}
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gtk_css_palette_value_add_color (result, ident, color);
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g_free (ident);
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} while (_gtk_css_parser_try (parser, ",", TRUE));
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return result;
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}
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const GdkRGBA *
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gtk_css_palette_value_get_color (GtkCssValue *value,
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const char *name)
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{
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GtkCssValue *color;
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g_return_val_if_fail (value->class == >K_CSS_VALUE_PALETTE, NULL);
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color = g_hash_table_lookup (value->colors, name);
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if (color == NULL)
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return NULL;
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return _gtk_css_rgba_value_get_rgba (color);
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}
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