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
|
/*
* Copyright (C) 2010 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* 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, see <http://www.gnu.org/licenses/>.
*
* Authored by: Neil Jagdish Patel <neil.patel@canonical.com>
*/
#ifndef ICON_LOADER_H
#define ICON_LOADER_H
#include <string>
#include <map>
#include <vector>
#include <sigc++/sigc++.h>
#include <gtk/gtk.h>
class IconLoader
{
public:
typedef sigc::slot<void, const char *, guint, GdkPixbuf *> IconLoaderCallback;
IconLoader ();
~IconLoader ();
// DO NOT `delete` this...ever.
static IconLoader * GetDefault ();
void LoadFromIconName (const char *icon_name,
guint size,
IconLoaderCallback slot);
void LoadFromGIconString (const char *gicon_string,
guint size,
IconLoaderCallback slot);
void LoadFromFilename (const char *filename,
guint size,
IconLoaderCallback slot);
private:
enum IconLoaderRequestType
{
REQUEST_TYPE_ICON_NAME=0,
REQUEST_TYPE_GICON_STRING,
REQUEST_TYPE_FILENAME
};
struct IconLoaderTask
{
IconLoaderRequestType type;
char *data;
guint size;
char *key;
IconLoaderCallback slot;
IconLoader *self;
};
void QueueTask (const char *key,
const char *data,
guint size,
IconLoaderCallback slot,
IconLoaderRequestType type);
char * Hash (const char *data, guint size);
bool CacheLookup (const char *key,
const char *data,
guint size,
IconLoaderCallback slot);
bool ProcessTask (IconLoaderTask *task);
bool ProcessIconNameTask (IconLoaderTask *task);
bool ProcessGIconTask (IconLoaderTask *task);
bool ProcessFilenameTask (IconLoaderTask *task);
void ProcessFilenameTaskReady (IconLoaderTask *task, char *contents, gsize length);
bool Iteration ();
void FreeTask (IconLoaderTask *task);
static bool Loop (IconLoader *self);
static void LoadContentsReady (GObject *object, GAsyncResult *res, IconLoaderTask *task);
private:
bool _no_load;
std::map<std::string, GdkPixbuf *> _cache;
GQueue *_tasks;
guint _idle_id;
GtkIconTheme *_theme;
gint64 _idle_start_time;
};
#endif // ICON_LOADER_H
|