File: color-scheme.c

package info (click to toggle)
lxappearance 0.6.3-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid, stretch
  • size: 1,624 kB
  • ctags: 199
  • sloc: ansic: 1,745; sh: 1,232; makefile: 112; xml: 44; python: 28
file content (319 lines) | stat: -rw-r--r-- 12,352 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
//      color-scheme.c
//
//      Copyright 2010 Hong Jen Yee (PCMan) <pcman.tw@gmail.com>
//
//      This program is free software; you can redistribute it and/or modify
//      it under the terms of the GNU General Public License as published by
//      the Free Software Foundation; either version 2 of the License, or
//      (at your option) any later version.
//
//      This program 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 General Public License for more details.
//
//      You should have received a copy of the GNU General Public License
//      along with this program; if not, write to the Free Software
//      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
//      MA 02110-1301, USA.

#include "lxappearance.h"
#include "color-scheme.h"
#include <string.h>
#include <glib/gi18n.h>

static GRegex* gtkrc_include_reg = NULL;
static GRegex* gtkrc_color_scheme_reg = NULL;

/* http://live.gnome.org/GnomeArt/Tutorials/GtkThemes/SymbolicColors/#Default_colors_in_GNOME */
static const char* gnome_color_names[] = {
    "fg_color", /* The base for the foreground colors. */
    "bg_color", /* Color to generate the background colors from. */
    "base_color", /* The base color. */
    "text_color", /* The text color in input widgets. */
    "selected_bg_color", /* Color for the background of selected text. */
    "selected_fg_color", /* Color of selected text. */
    "tooltip_bg_color", /* Background color of tooltips. */
    "tooltip_fg_color", /* Text color for text in tooltips. */
};

char* color_scheme_hash_to_str(GHashTable* hash)
{
    GHashTableIter it;
    char* key, *val;
    GString* ret = g_string_sized_new(100);
    g_hash_table_iter_init (&it, hash);
    while(g_hash_table_iter_next(&it, (gpointer*)&key, (gpointer*)&val))
        g_string_append_printf(ret, "%s:%s\n", key, val);
    return g_string_free(ret, FALSE);
}

void color_scheme_str_to_hash(GHashTable* hash, const char* color_str)
{
    /* g_debug("color_str: %s", color_str); */
    /* split color scheme string into key/value pairs */
    char** pairs = g_strsplit_set(color_str, "\n;", -1);
    char** pair;
    for(pair = pairs; *pair; ++pair)
    {
        char* name = strtok(*pair, ": \t");
        /* g_debug("color_name = %s", name); */
        if(name)
        {
            char* val = strtok(NULL, " \t");
            if(val)
                g_hash_table_replace(hash, g_strdup(name), g_strdup(val));
        }
    }
    g_strfreev(pairs);
}

static void on_color_set(GtkColorButton* btn, const char* color_name)
{
    GdkColor clr;
    char* color_str;
    gtk_color_button_get_color(btn, &clr);
    color_str = gdk_color_to_string(&clr);

    g_hash_table_replace(app.color_scheme_hash, g_strdup(color_name), color_str);
    g_free(app.color_scheme);
    app.color_scheme = color_scheme_hash_to_str(app.color_scheme_hash);

    g_object_set(gtk_settings_get_default(), "gtk-color-scheme", app.color_scheme, NULL);

    lxappearance_changed();
}

static void update_color_buttons()
{
    int i;
    /* set the color to buttons */
    GHashTable* hash;

    /* if custom color scheme is not used, use the default one. */
    if(app.color_scheme)
        hash = app.color_scheme_hash;
    else
        hash = app.default_color_scheme_hash;

    for(i = 0; i < 8; ++i)
    {
        GtkWidget* btn = app.color_btns[i];
        const char* color_name = gnome_color_names[i];
        const char* color_str = (const char*)g_hash_table_lookup(hash, color_name);
        /* g_debug("%s ='%s'", gnome_color_names[i], color_str); */
        if(color_str)
        {
            GdkColor clr;
            if(gdk_color_parse(color_str, &clr))
            {
                /* prevent invoking color-set handlers here. */
                g_signal_handlers_block_by_func(btn, on_color_set, (gpointer)color_name);
                gtk_color_button_set_color(GTK_COLOR_BUTTON(btn), &clr);
                g_signal_handlers_unblock_by_func(btn, on_color_set, (gpointer)color_name);
            }
            gtk_widget_set_sensitive(btn, TRUE);
        }
        else
            gtk_widget_set_sensitive(btn, FALSE);
    }
}

static void hash_table_copy(GHashTable* dest, GHashTable* src)
{
    GHashTableIter it;
    char* key, *val;
    g_hash_table_remove_all(dest);
    g_hash_table_iter_init(&it, src);
    while(g_hash_table_iter_next(&it, (gpointer*)&key, (gpointer*)&val))
        g_hash_table_insert(dest, g_strdup(key), g_strdup(val));
}

static void on_custom_color_toggled(GtkToggleButton* btn, gpointer user_data)
{
    g_free(app.color_scheme);
    if(gtk_toggle_button_get_active(btn)) /* use customized color scheme. */
    {
        gtk_widget_set_sensitive(app.color_table, TRUE);
        /* copy default colors to custom color hash table */
        hash_table_copy(app.color_scheme_hash, app.default_color_scheme_hash);
        app.color_scheme = color_scheme_hash_to_str(app.color_scheme_hash);
        g_object_set(gtk_settings_get_default(), "gtk-color-scheme", app.color_scheme, NULL);
    }
    else /* use default colors provided by the theme. */
    {
        char* color_scheme_str;
        gtk_widget_set_sensitive(app.color_table, FALSE);
        /* restore default colors */
        app.color_scheme = NULL;
        g_hash_table_remove_all(app.color_scheme_hash);
        if(g_hash_table_size(app.default_color_scheme_hash) > 0)
            color_scheme_str = color_scheme_hash_to_str(app.default_color_scheme_hash);
        else
            color_scheme_str = g_strdup("");
        g_object_set(gtk_settings_get_default(), "gtk-color-scheme", color_scheme_str, NULL);
        g_free(color_scheme_str);
    }
    update_color_buttons();

    lxappearance_changed();
}

void color_scheme_init(GtkBuilder* b)
{
    int i;

    app.color_table = GTK_WIDGET(gtk_builder_get_object(b, "color_table"));
    app.custom_colors = GTK_WIDGET(gtk_builder_get_object(b, "custom_colors"));
    app.no_custom_colors = GTK_WIDGET(gtk_builder_get_object(b, "no_custom_colors"));

    /* toggle the check box if we have custom color scheme */
    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(app.custom_colors), app.color_scheme != NULL);
    g_signal_connect(app.custom_colors, "toggled", G_CALLBACK(on_custom_color_toggled), NULL);

    /* hash table of the default color scheme of currently selected theme. */
    app.default_color_scheme_hash = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);

    for(i = 0; i < 8; ++i)
        app.color_btns[i] = GTK_WIDGET(gtk_builder_get_object(b, gnome_color_names[i]));;

    /* update color scheme page for currently selected gtk theme. */
    color_scheme_update();

    for(i = 0; i < 8; ++i)
        g_signal_connect(app.color_btns[i], "color-set", G_CALLBACK(on_color_set), (gpointer)gnome_color_names[i]);
}

/* return FALSE when the gtkrc file does not exists. */
gboolean gtkrc_file_get_color_scheme(const char* gtkrc_file, GHashTable* hash)
{
    char* content;
    if(G_UNLIKELY(!gtkrc_include_reg)) /* if regexp object is not yet created */
    {
        /* regular expressions used to parse gtkrc files */
        gtkrc_include_reg = g_regex_new(
            "[\\s]*include[\\s]+(\"([^\"]+)\"|'([^']+)')",
            G_REGEX_MULTILINE|G_REGEX_OPTIMIZE, 0, NULL);

        gtkrc_color_scheme_reg = g_regex_new(
            "[\\s]*(gtk-color-scheme|gtk_color_scheme)[\\s]*=[\\s]*(\"([^\"]+)\"|'([^']+)')",
            G_REGEX_MULTILINE|G_REGEX_OPTIMIZE, 0, NULL);
    }

    /* g_debug("check: %s", gtkrc_file); */
    if(g_file_get_contents(gtkrc_file, &content, NULL, NULL))
    {
        GMatchInfo* match_info;

        /* find gtkrc files included in this file. */
        g_regex_match(gtkrc_include_reg, content, 0, &match_info);
        while(g_match_info_matches (match_info))
        {
            gchar* include = g_match_info_fetch(match_info, 2);
            /* try to load color schemes in every included gtkrc file. */
            if(!g_path_is_absolute(include)) /* make a full path when needed. */
            {
                char* dirname = g_path_get_dirname(gtkrc_file);
                char* file = g_build_filename(dirname, include, NULL);
                g_free(dirname);
                g_free(include);
                include = file;
            }
            gtkrc_file_get_color_scheme(include, hash);
            g_free(include);
            g_match_info_next(match_info, NULL);
        }

        /* try to extract gtk-color-scheme from the gtkrc file. */
        g_regex_match(gtkrc_color_scheme_reg, content, 0, &match_info);
        while(g_match_info_matches (match_info))
        {
            char *color_scheme_str = g_match_info_fetch(match_info, 3);
            /* need to unescape the string to replace "\\n" with "\n" */
            char* unescaped = g_strcompress(color_scheme_str);
            g_free (color_scheme_str);
            color_scheme_str_to_hash(hash, unescaped);
            g_free(unescaped);
            g_match_info_next(match_info, NULL);
        }
        g_match_info_free(match_info);
        g_free(content);
    }
    else
        return FALSE;
    return TRUE;
}

/* update the color scheme page for currently selected gtk theme.
 * called when currently selected gtk theme gets changed. */
void color_scheme_update()
{
    /* the current gtk theme gets changed.
     * reload the default color scheme of current theme. */
    g_hash_table_remove_all(app.default_color_scheme_hash);

    if(app.widget_theme)
    {
        gboolean file_found;
        char *gtkrc;

        /* search in userdata theme dir first */
        gtkrc = g_build_filename(g_get_user_data_dir(), "themes", app.widget_theme, "gtk-2.0/gtkrc", NULL);
        file_found = gtkrc_file_get_color_scheme(gtkrc, app.default_color_scheme_hash);
        g_free(gtkrc);
        if (!file_found)
        {
            /* search in the home dir as old-style fallback */
            gtkrc = g_build_filename(g_get_home_dir(), ".themes", app.widget_theme, "gtk-2.0/gtkrc", NULL);
            /* if the theme is found in user-custom theme dir */
            file_found = gtkrc_file_get_color_scheme(gtkrc, app.default_color_scheme_hash);
            g_free(gtkrc);
        }

        if(!file_found)
        {
            /* if the theme is found in system-wide theme dir */
            gtkrc = g_build_filename(gtk_rc_get_theme_dir(), app.widget_theme, "gtk-2.0/gtkrc", NULL);
            gtkrc_file_get_color_scheme(gtkrc, app.default_color_scheme_hash);
            g_free(gtkrc);
        }
        app.color_scheme_supported = (g_hash_table_size(app.default_color_scheme_hash) > 0);
    }
    else
        app.color_scheme_supported = FALSE;

    /* unfortunately we cannot set colors without XSETTINGS daemon,
       themes will override any custom settings in .gtkrc-2.0 file */
    /* FIXME: we should support other xsettings daemons too */
    if(app.color_scheme_supported && app.use_lxsession)
    {
        gtk_widget_set_sensitive(app.custom_colors, TRUE);
        gtk_widget_set_sensitive(app.color_table, app.color_scheme != NULL);
        gtk_widget_hide(app.no_custom_colors);

        /* if customized color scheme is not used,
         * use default colors of the theme. */
        if(!app.color_scheme)
        {
            char* color_scheme_str = color_scheme_hash_to_str(app.default_color_scheme_hash);
            g_object_set(gtk_settings_get_default(), "gtk-color-scheme", color_scheme_str, NULL);
            g_free(color_scheme_str);
        }
    }
    else
    {
        gtk_widget_set_sensitive(app.color_table, FALSE);
        gtk_widget_set_sensitive(app.custom_colors, FALSE);
        if (app.color_scheme_supported)
            gtk_label_set_text(GTK_LABEL(app.no_custom_colors),
                               _("Setting color scheme is not available without lxsession as session manager."));
        else
            gtk_label_set_text(GTK_LABEL(app.no_custom_colors),
                               _("Color scheme is not supported by currently selected widget theme."));
        gtk_widget_show(app.no_custom_colors);
        app.color_scheme_supported = FALSE;
    }
    /* set the color to buttons */
    update_color_buttons();
}