bool
Instance::import_external_canvas(Canvas::Handle canvas, std::map<Canvas*, Canvas::Handle> &imported)
{
etl::handle<CanvasInterface> canvas_interface;
for(IndependentContext i = canvas->get_independent_context(); *i; i++)
{
etl::handle<Layer_PasteCanvas> paste_canvas = etl::handle<Layer_PasteCanvas>::cast_dynamic(*i);
if (!paste_canvas) continue;
Canvas::Handle sub_canvas = paste_canvas->get_sub_canvas();
if (!sub_canvas) continue;
if (!sub_canvas->is_root()) continue;
if (imported.count(sub_canvas.get()) != 0) {
// link already exported canvas
Canvas::Handle new_canvas = imported[sub_canvas.get()];
if (!new_canvas) continue;
// Action to link canvas
try
{
Action::Handle action(Action::LayerParamSet::create());
if (!action) continue;
canvas_interface = find_canvas_interface(canvas);
action->set_param("canvas",canvas);
action->set_param("canvas_interface",canvas_interface);
action->set_param("layer",Layer::Handle(paste_canvas));
action->set_param("param","canvas");
action->set_param("new_value",ValueBase(new_canvas));
if(!action->is_ready()) continue;
if(!perform_action(action)) continue;
}
catch(...)
{
continue;
}
} else {
imported[sub_canvas.get()] = NULL;
// generate name
std::string fname = filename_sans_extension(basename(sub_canvas->get_file_name()));
static const char bad_chars[]=" :#@$^&()*";
for(std::string::iterator j = fname.begin(); j != fname.end(); j++)
for(const char *k = bad_chars; *k != 0; k++)
if (*j == *k) { *j = '_'; break; }
if (fname.empty()) fname = "canvas";
if (fname[0]>='0' && fname[0]<='9')
fname = "_" + fname;
std::string name;
bool found = false;
for(int j = 1; j < 1000; j++)
{
name = j == 1 ? fname : strprintf("%s_%d", fname.c_str(), j);
if (canvas->value_node_list().count(name) == false)
{
found = true;
for(std::list<Canvas::Handle>::const_iterator iter=canvas->children().begin();iter!=canvas->children().end();iter++)
if(name==(*iter)->get_id())
{ found = false; break; }
if (found) break;
}
}
if (!found) continue;
// Action to import canvas
try {
Action::Handle action(Action::ValueDescExport::create());
if (!action) continue;
canvas_interface = find_canvas_interface(canvas);
action->set_param("canvas",canvas);
action->set_param("canvas_interface",canvas_interface);
action->set_param("value_desc",ValueDesc(Layer::Handle(paste_canvas),std::string("canvas")));
action->set_param("name",name);
if(!action->is_ready()) continue;
if(!perform_action(action)) continue;
std::string warnings;
imported[sub_canvas.get()] = canvas->find_canvas(name, warnings);
}
catch(...)
{
continue;
}
return true;
}
}
for(std::list<Canvas::Handle>::const_iterator i = canvas->children().begin(); i != canvas->children().end(); i++)
if (import_external_canvas(*i, imported))
return true;
return false;
}
