/**
* champlain_map_source_chain_pop:
* @source_chain: a #ChamplainMapSourceChain
*
* Pops a map source from the top of the stack from the chain.
*
* Since: 0.6
*/
void
champlain_map_source_chain_pop (ChamplainMapSourceChain *source_chain)
{
ChamplainMapSourceChainPrivate *priv = source_chain->priv;
ChamplainMapSource *old_stack_top = priv->stack_top;
ChamplainMapSource *next_source = champlain_map_source_get_next_source (priv->stack_top);
g_return_if_fail (priv->stack_top);
if (CHAMPLAIN_IS_TILE_CACHE (priv->stack_top))
{
ChamplainTileCache *tile_cache = NULL;
if (CHAMPLAIN_IS_TILE_CACHE (next_source))
tile_cache = CHAMPLAIN_TILE_CACHE (next_source);
/* _push() guarantees that the last source is tile_source so we can be
sure that the next map source is still within the chain */
assign_cache_of_next_source_sequence (source_chain, priv->stack_top, tile_cache);
}
if (next_source == champlain_map_source_get_next_source (CHAMPLAIN_MAP_SOURCE (source_chain)))
{
priv->stack_top = NULL;
priv->stack_bottom = NULL;
}
else
priv->stack_top = next_source;
g_object_unref (old_stack_top);
}
/**
* champlain_map_source_chain_push:
* @source_chain: a #ChamplainMapSourceChain
* @map_source: the #ChamplainMapSource to be pushed into the chain
*
* Pushes a map source into the chain.
*
* Since: 0.6
*/
void
champlain_map_source_chain_push (ChamplainMapSourceChain *source_chain,
ChamplainMapSource *map_source)
{
ChamplainMapSourceChainPrivate *priv = source_chain->priv;
gboolean is_cache = FALSE;
if (CHAMPLAIN_IS_TILE_CACHE(map_source))
is_cache = TRUE;
else
g_return_if_fail (CHAMPLAIN_IS_TILE_SOURCE(map_source));
g_object_ref_sink (map_source);
if (!priv->stack_top)
{
ChamplainMapSource *chain_next_source = champlain_map_source_get_next_source (CHAMPLAIN_MAP_SOURCE(source_chain));
/* tile source has to be last */
g_return_if_fail (!is_cache);
priv->stack_top = map_source;
priv->stack_bottom = map_source;
if (chain_next_source)
champlain_map_source_set_next_source (priv->stack_bottom, chain_next_source);
}
else
{
if (g_signal_handler_is_connected (priv->stack_top, priv->sig_handler_id))
g_signal_handler_disconnect (priv->stack_top, priv->sig_handler_id);
champlain_map_source_set_next_source (map_source, priv->stack_top);
priv->stack_top = map_source;
if (is_cache)
{
ChamplainTileCache *tile_cache = CHAMPLAIN_TILE_CACHE(map_source);
assign_cache_of_next_source_sequence (source_chain, priv->stack_top, tile_cache);
}
}
priv->sig_handler_id = g_signal_connect (priv->stack_top, "reload-tiles",
G_CALLBACK (reload_tiles_cb), source_chain);
}
/**
* champlain_map_source_chain_pop:
* @source_chain: a #ChamplainMapSourceChain
*
* Pops the map source from the top of the stack from the chain.
*
* Since: 0.6
*/
void
champlain_map_source_chain_pop (ChamplainMapSourceChain *source_chain)
{
ChamplainMapSourceChainPrivate *priv = source_chain->priv;
ChamplainMapSource *old_stack_top = priv->stack_top;
ChamplainMapSource *next_source = champlain_map_source_get_next_source (priv->stack_top);
g_return_if_fail (priv->stack_top);
if (g_signal_handler_is_connected (priv->stack_top, priv->sig_handler_id))
g_signal_handler_disconnect (priv->stack_top, priv->sig_handler_id);
if (CHAMPLAIN_IS_TILE_CACHE(priv->stack_top))
{
ChamplainTileCache *tile_cache = NULL;
if (CHAMPLAIN_IS_TILE_CACHE(next_source))
tile_cache = CHAMPLAIN_TILE_CACHE(next_source);
/* _push() guarantees that the last source is tile_source so we can be
sure that the next map source is still within the chain */
assign_cache_of_next_source_sequence (source_chain, priv->stack_top, tile_cache);
}
if (next_source == champlain_map_source_get_next_source (CHAMPLAIN_MAP_SOURCE(source_chain)))
{
priv->stack_top = NULL;
priv->stack_bottom = NULL;
}
else
priv->stack_top = next_source;
if (priv->stack_top)
{
priv->sig_handler_id = g_signal_connect (priv->stack_top, "reload-tiles",
G_CALLBACK (reload_tiles_cb), source_chain);
}
g_object_unref (old_stack_top);
}
/**
* champlain_map_source_chain_push:
* @source_chain: a #ChamplainMapSourceChain
* @map_source: the #ChamplainMapSource to be pushed into the chain
*
* Pushes a map source into the chain.
*
* Since: 0.6
*/
void
champlain_map_source_chain_push (ChamplainMapSourceChain *source_chain,
ChamplainMapSource *map_source)
{
ChamplainMapSourceChainPrivate *priv = source_chain->priv;
gboolean is_cache = FALSE;
if (CHAMPLAIN_IS_TILE_CACHE (map_source))
is_cache = TRUE;
else
g_return_if_fail (CHAMPLAIN_IS_TILE_SOURCE (map_source));
g_object_ref_sink (map_source);
if (!priv->stack_top)
{
ChamplainMapSource *chain_next_source = champlain_map_source_get_next_source (CHAMPLAIN_MAP_SOURCE (source_chain));
/* tile source has to be last */
g_return_if_fail (!is_cache);
priv->stack_top = map_source;
priv->stack_bottom = map_source;
if (chain_next_source)
champlain_map_source_set_next_source (priv->stack_bottom, chain_next_source);
}
else
{
champlain_map_source_set_next_source (map_source, priv->stack_top);
priv->stack_top = map_source;
if (is_cache)
{
ChamplainTileCache *tile_cache = CHAMPLAIN_TILE_CACHE (map_source);
assign_cache_of_next_source_sequence (source_chain, priv->stack_top, tile_cache);
}
}
}
