/**
* This method pushes a module onto the module stack.
* The provided module becomes the new active module automatically.
* The existing active module is paused, and the provided
* module is told to Start.
*
* @param module the module that will be the new active module.
*/
void ModuleManager::push( ModulePtr module )
{
if (currentModule())
currentModule()->onPause();
MF_ASSERT( module );
modules_.push( module );
module->onStart();
}
/**
* This method removes all modules left on the module stack.
* This allows for a quick graceful exit from the application.
*/
void ModuleManager::popAll()
{
while ( currentModule() )
{
//NOTE - don't call our own pop method,
//simply because we don't want to resume
//any of the modules further down the stack
//when they become the next "current module"
currentModule()->onStop();
modules_.pop();
}
}
/**
* This method removes the current module from the module stack.
* The current module is told to Stop.
* The new active module ( if there is one ) is told to resume,
* where previously it was paused during an earlier push() operation.
*/
void ModuleManager::pop()
{
int exitCode;
ModulePtr current = currentModule();
if ( current )
{
exitCode = current->onStop();
modules_.pop();
}
if ( currentModule() )
currentModule()->onResume( exitCode );
}
static Module * topLevelModule(Evaluator * ex, Node * in) {
Module * m = currentModule(ex, in);
if (m != NULL) {
Project * p = m->project();
if (p == NULL) {
diag::error(in->location()) << "Could not find top-level module.";
return NULL;
}
return p->mainModule();
}
return NULL;
}
// Avoid multiple fromUtf8(), copies and hashing of the module name.
// This is only called when metaTypeDataLock is locked.
static QHashedString moduleFromUtf8(const char *module)
{
if (!module)
return QHashedString();
static const char *lastModule = 0;
static QHashedString lastModuleStr;
// Separate plugins may have different strings at the same address
QHashedCStringRef currentModule(module, ::strlen(module));
if ((lastModule != module) || (lastModuleStr.hash() != currentModule.hash())) {
lastModuleStr = QString::fromUtf8(module);
lastModuleStr.hash();
lastModule = module;
}
return lastModuleStr;
}
