1 /*
2 * MessageStack - manages stack of active status messages
3 *
4 * Authors:
5 * MenTaLguY <mental@rydia.net>
6 *
7 * Copyright (C) 2004 MenTaLguY
8 *
9 * Released under GNU GPL, read the file 'COPYING' for more information
10 */
12 #include <string.h>
13 #include <glib/gstrfuncs.h>
14 #include "message-stack.h"
16 namespace Inkscape {
18 MessageStack::MessageStack()
19 : _messages(NULL), _next_id(1)
20 {
21 }
23 MessageStack::~MessageStack()
24 {
25 while (_messages) {
26 _messages = _discard(_messages);
27 }
28 }
30 MessageId MessageStack::push(MessageType type, gchar const *message) {
31 return _push(type, 0, message);
32 }
34 MessageId MessageStack::pushF(MessageType type, gchar const *format, ...)
35 {
36 va_list args;
37 va_start(args, format);
38 MessageId id=pushVF(type, format, args);
39 va_end(args);
40 return id;
41 }
43 MessageId MessageStack::pushVF(MessageType type, gchar const *format, va_list args)
44 {
45 MessageId id;
46 gchar *message=g_strdup_vprintf(format, args);
47 id = push(type, message);
48 g_free(message);
49 return id;
50 }
52 void MessageStack::cancel(MessageId id) {
53 Message **ref;
54 for ( ref = &_messages ; *ref ; ref = &(*ref)->next ) {
55 if ( (*ref)->id == id ) {
56 *ref = _discard(*ref);
57 _emitChanged();
58 break;
59 }
60 }
61 }
63 MessageId MessageStack::flash(MessageType type, gchar const *message) {
64 switch (type) {
65 case INFORMATION_MESSAGE: // stay rather long so as to seem permanent, but eventually disappear
66 return _push(type, 6000 + 80*strlen(message), message);
67 break;
68 case ERROR_MESSAGE: // pretty important stuff, but temporary
69 return _push(type, 4000 + 60*strlen(message), message);
70 break;
71 case WARNING_MESSAGE: // a bit less important than error
72 return _push(type, 2000 + 40*strlen(message), message);
73 break;
74 case IMMEDIATE_MESSAGE: // same length as normal, higher priority
75 return _push(type, 1000 + 20*strlen(message), message);
76 break;
77 case NORMAL_MESSAGE: // something ephemeral
78 default:
79 return _push(type, 1000 + 20*strlen(message), message);
80 break;
81 }
82 }
84 MessageId MessageStack::flashF(MessageType type, gchar const *format, ...) {
85 va_list args;
86 va_start(args, format);
87 MessageId id = flashVF(type, format, args);
88 va_end(args);
89 return id;
90 }
92 MessageId MessageStack::flashVF(MessageType type, gchar const *format, va_list args)
93 {
94 gchar *message=g_strdup_vprintf(format, args);
95 MessageId id = flash(type, message);
96 g_free(message);
97 return id;
98 }
100 MessageId MessageStack::_push(MessageType type, guint lifetime, gchar const *message)
101 {
102 Message *m=new Message;
103 MessageId id=_next_id++;
105 m->stack = this;
106 m->id = id;
107 m->type = type;
108 m->message = g_strdup(message);
110 if (lifetime) {
111 m->timeout_id = g_timeout_add(lifetime, &MessageStack::_timeout, m);
112 } else {
113 m->timeout_id = 0;
114 }
116 m->next = _messages;
117 _messages = m;
119 _emitChanged();
121 return id;
122 }
124 MessageStack::Message *MessageStack::_discard(MessageStack::Message *m)
125 {
126 Message *next=m->next;
127 if (m->timeout_id) {
128 g_source_remove(m->timeout_id);
129 m->timeout_id = 0;
130 }
131 g_free(m->message);
132 m->message = NULL;
133 m->stack = NULL;
134 delete m;
135 return next;
136 }
138 void MessageStack::_emitChanged() {
139 if (_messages) {
140 _changed_signal.emit(_messages->type, _messages->message);
141 } else {
142 _changed_signal.emit(NORMAL_MESSAGE, NULL);
143 }
144 }
146 gboolean MessageStack::_timeout(gpointer data) {
147 Message *m=reinterpret_cast<Message *>(data);
148 m->timeout_id = 0;
149 m->stack->cancel(m->id);
150 return FALSE;
151 }
153 }
155 /*
156 Local Variables:
157 mode:c++
158 c-file-style:"stroustrup"
159 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
160 indent-tabs-mode:nil
161 fill-column:99
162 End:
163 */
164 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :