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/*
* MessageStack - manages stack of active status messages
*
* Authors:
* MenTaLguY <mental@rydia.net>
*
* Copyright (C) 2004 MenTaLguY
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <string.h>
#include <glib.h>
#include <cstring>
#include "message-stack.h"
namespace Inkscape {
MessageStack::MessageStack()
: _messages(NULL), _next_id(1)
{
}
MessageStack::~MessageStack()
{
while (_messages) {
_messages = _discard(_messages);
}
}
MessageId MessageStack::push(MessageType type, gchar const *message) {
return _push(type, 0, message);
}
MessageId MessageStack::pushF(MessageType type, gchar const *format, ...)
{
va_list args;
va_start(args, format);
MessageId id=pushVF(type, format, args);
va_end(args);
return id;
}
MessageId MessageStack::pushVF(MessageType type, gchar const *format, va_list args)
{
MessageId id;
gchar *message=g_strdup_vprintf(format, args);
id = push(type, message);
g_free(message);
return id;
}
void MessageStack::cancel(MessageId id) {
Message **ref;
for ( ref = &_messages ; *ref ; ref = &(*ref)->next ) {
if ( (*ref)->id == id ) {
*ref = _discard(*ref);
_emitChanged();
break;
}
}
}
MessageId MessageStack::flash(MessageType type, Glib::ustring const &message)
{
MessageId id = flash( type, message.c_str() );
return id;
}
MessageId MessageStack::flash(MessageType type, gchar const *message) {
switch (type) {
case INFORMATION_MESSAGE: // stay rather long so as to seem permanent, but eventually disappear
return _push(type, 6000 + 80*strlen(message), message);
break;
case ERROR_MESSAGE: // pretty important stuff, but temporary
return _push(type, 4000 + 60*strlen(message), message);
break;
case WARNING_MESSAGE: // a bit less important than error
return _push(type, 2000 + 40*strlen(message), message);
break;
case IMMEDIATE_MESSAGE: // same length as normal, higher priority
return _push(type, 1000 + 20*strlen(message), message);
break;
case NORMAL_MESSAGE: // something ephemeral
default:
return _push(type, 1000 + 20*strlen(message), message);
break;
}
}
MessageId MessageStack::flashF(MessageType type, gchar const *format, ...) {
va_list args;
va_start(args, format);
MessageId id = flashVF(type, format, args);
va_end(args);
return id;
}
MessageId MessageStack::flashVF(MessageType type, gchar const *format, va_list args)
{
gchar *message=g_strdup_vprintf(format, args);
MessageId id = flash(type, message);
g_free(message);
return id;
}
MessageId MessageStack::_push(MessageType type, guint lifetime, gchar const *message)
{
Message *m=new Message;
MessageId id=_next_id++;
m->stack = this;
m->id = id;
m->type = type;
m->message = g_strdup(message);
if (lifetime) {
m->timeout_id = g_timeout_add(lifetime, &MessageStack::_timeout, m);
} else {
m->timeout_id = 0;
}
m->next = _messages;
_messages = m;
_emitChanged();
return id;
}
MessageStack::Message *MessageStack::_discard(MessageStack::Message *m)
{
Message *next=m->next;
if (m->timeout_id) {
g_source_remove(m->timeout_id);
m->timeout_id = 0;
}
g_free(m->message);
m->message = NULL;
m->stack = NULL;
delete m;
return next;
}
void MessageStack::_emitChanged() {
if (_messages) {
_changed_signal.emit(_messages->type, _messages->message);
} else {
_changed_signal.emit(NORMAL_MESSAGE, NULL);
}
}
gboolean MessageStack::_timeout(gpointer data) {
Message *m=reinterpret_cast<Message *>(data);
m->timeout_id = 0;
m->stack->cancel(m->id);
return FALSE;
}
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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