// Apply the given change to the universe.
void GameData::Change(const DataNode &node)
{
if(node.Token(0) == "fleet" && node.Size() >= 2)
fleets.Get(node.Token(1))->Load(node);
else if(node.Token(0) == "galaxy" && node.Size() >= 2)
galaxies.Get(node.Token(1))->Load(node);
else if(node.Token(0) == "government" && node.Size() >= 2)
governments.Get(node.Token(1))->Load(node);
else if(node.Token(0) == "outfitter" && node.Size() >= 2)
outfitSales.Get(node.Token(1))->Load(node, outfits);
else if(node.Token(0) == "planet" && node.Size() >= 2)
planets.Get(node.Token(1))->Load(node, shipSales, outfitSales);
else if(node.Token(0) == "shipyard" && node.Size() >= 2)
shipSales.Get(node.Token(1))->Load(node, ships);
else if(node.Token(0) == "system" && node.Size() >= 2)
systems.Get(node.Token(1))->Load(node, planets);
else if(node.Token(0) == "news" && node.Size() >= 2)
news.Get(node.Token(1))->Load(node);
else if(node.Token(0) == "link" && node.Size() >= 3)
systems.Get(node.Token(1))->Link(systems.Get(node.Token(2)));
else if(node.Token(0) == "unlink" && node.Size() >= 3)
systems.Get(node.Token(1))->Unlink(systems.Get(node.Token(2)));
else
node.PrintTrace("Invalid \"event\" data:");
}
void ConditionSet::Add(const DataNode &node)
{
if(node.Size() == 2)
{
if(!Add(node.Token(0), node.Token(1)))
node.PrintTrace("Unrecognized condition expression:");
}
else if(node.Size() == 3)
{
if(!Add(node.Token(0), node.Token(1), node.Value(2)))
node.PrintTrace("Unrecognized condition expression:");
}
else if(node.Size() == 1 && node.Token(0) == "never")
entries.emplace_back("", "!=", 0);
else if(node.Size() == 1 && (node.Token(0) == "and" || node.Token(0) == "or"))
{
children.emplace_back();
children.back().Load(node);
}
else
node.PrintTrace("Unrecognized condition expression:");
}
// Add a label, pointing to whatever node is created next.
void Conversation::AddLabel(const string &label, const DataNode &node)
{
if(labels.find(label) != labels.end())
{
node.PrintTrace("Conversation: label \"" + label + "\" is used more than once:");
return;
}
// If there are any unresolved references to this label, we can now set
// their indices correctly.
auto range = unresolved.equal_range(label);
for(auto it = range.first; it != range.second; ++it)
nodes[it->second.first].data[it->second.second].second = nodes.size();
unresolved.erase(range.first, range.second);
// Remember what index this label points to.
labels[label] = nodes.size();
}
void Conversation::Load(const DataNode &node)
{
if(node.Token(0) != "conversation")
return;
if(node.Size() >= 2)
identifier = node.Token(1);
// Free any previously loaded data.
nodes.clear();
for(const DataNode &child : node)
{
if(child.Token(0) == "scene" && child.Size() >= 2)
{
nodes.emplace_back();
int next = nodes.size();
nodes.back().data.emplace_back("", next);
nodes.back().scene = SpriteSet::Get(child.Token(1));
nodes.back().sceneName = child.Token(1);
}
else if(child.Token(0) == "label" && child.Size() >= 2)
{
// You cannot merge text above a label with text below it.
if(!nodes.empty())
nodes.back().canMergeOnto = false;
AddLabel(child.Token(1), child);
}
else if(child.Token(0) == "choice")
{
// Create a new node with one or more choices in it.
nodes.emplace_back(true);
for(const DataNode &grand : child)
{
// Store the text of this choice. By default, the choice will
// just bring you to the next node in the script.
nodes.back().data.emplace_back(grand.Token(0), nodes.size());
nodes.back().data.back().first += '\n';
// If this choice contains a goto, record it.
for(const DataNode &great : grand)
{
int index = TokenIndex(great.Token(0));
if(!index && great.Size() >= 2)
Goto(great.Token(1), nodes.size() - 1, nodes.back().data.size() - 1);
else if(index < 0)
nodes.back().data.back().second = index;
else
continue;
break;
}
}
if(nodes.back().data.empty())
{
child.PrintTrace("Conversation contains an empty \"choice\" node:");
nodes.pop_back();
}
}
else if(child.Token(0) == "name")
nodes.emplace_back(true);
else if(child.Token(0) == "branch")
{
nodes.emplace_back();
nodes.back().canMergeOnto = false;
nodes.back().conditions.Load(child);
for(int i = 1; i <= 2; ++i)
{
// If no link is provided, just go to the next node.
nodes.back().data.emplace_back("", nodes.size());
if(child.Size() > i)
{
int index = TokenIndex(child.Token(i));
if(!index)
Goto(child.Token(i), nodes.size() - 1, i - 1);
else if(index < 0)
nodes.back().data.back().second = index;
}
}
}
else if(child.Token(0) == "apply")
{
nodes.emplace_back();
nodes.back().canMergeOnto = false;
nodes.back().conditions.Load(child);
nodes.back().data.emplace_back("", nodes.size());
if(child.Size() > 1)
{
int index = TokenIndex(child.Token(1));
if(!index)
Goto(child.Token(1), nodes.size() - 1, 0);
else if(index < 0)
nodes.back().data.back().second = index;
}
}
else
{
// This is just an ordinary text node.
// If the previous node is a choice, or if the previous node ended
// in a goto, create a new node. Otherwise, just merge this new
// paragraph into the previous node.
if(nodes.empty() || !nodes.back().canMergeOnto)
{
nodes.emplace_back();
int next = nodes.size();
nodes.back().data.emplace_back("", next);
}
nodes.back().data.back().first += child.Token(0);
nodes.back().data.back().first += '\n';
// Check if this node contains a "goto".
for(const DataNode &grand : child)
{
int index = TokenIndex(grand.Token(0));
if(!index && grand.Size() >= 2)
Goto(grand.Token(1), nodes.size() - 1);
else if(index < 0)
nodes.back().data.back().second = index;
else
continue;
nodes.back().canMergeOnto = false;
break;
}
}
}
// Display a warning if a label was not resolved.
if(!unresolved.empty())
for(const auto &it : unresolved)
node.PrintTrace("Conversation contains unused label \"" + it.first + "\":");
// Check for any loops in the conversation.
for(const auto &it : labels)
{
int nodeIndex = it.second;
while(nodeIndex >= 0 && Choices(nodeIndex) <= 1)
{
nodeIndex = NextNode(nodeIndex);
if(nodeIndex == it.second)
{
node.PrintTrace("Conversation contains infinite loop beginning with label \"" + it.first + "\":");
nodes.clear();
return;
}
}
}
// Free the working buffers that we no longer need.
labels.clear();
unresolved.clear();
}
// Load a conversation from file.
void Conversation::Load(const DataNode &node)
{
// Make sure this really is a conversation specification.
if(node.Token(0) != "conversation")
return;
// Free any previously loaded data.
nodes.clear();
for(const DataNode &child : node)
{
if(child.Token(0) == "scene" && child.Size() >= 2)
{
// A scene always starts a new text node.
AddNode();
nodes.back().scene = SpriteSet::Get(child.Token(1));
}
else if(child.Token(0) == "label" && child.Size() >= 2)
{
// You cannot merge text above a label with text below it.
if(!nodes.empty())
nodes.back().canMergeOnto = false;
AddLabel(child.Token(1), child);
}
else if(child.Token(0) == "choice")
{
// Create a new node with one or more choices in it.
nodes.emplace_back(true);
for(const DataNode &grand : child)
{
// Store the text of this choice. By default, the choice will
// just bring you to the next node in the script.
nodes.back().data.emplace_back(grand.Token(0), nodes.size());
nodes.back().data.back().first += '\n';
LoadGotos(grand);
}
if(nodes.back().data.empty())
{
child.PrintTrace("Conversation contains an empty \"choice\" node:");
nodes.pop_back();
}
}
else if(child.Token(0) == "name")
{
// A name entry field is just represented as an empty choice node.
nodes.emplace_back(true);
}
else if(child.Token(0) == "branch")
{
// Don't merge "branch" nodes with any other nodes.
nodes.emplace_back();
nodes.back().canMergeOnto = false;
nodes.back().conditions.Load(child);
// A branch should always specify what node to go to if the test is
// true, and may also specify where to go if it is false.
for(int i = 1; i <= 2; ++i)
{
// If no link is provided, just go to the next node.
nodes.back().data.emplace_back("", nodes.size());
if(child.Size() > i)
{
int index = TokenIndex(child.Token(i));
if(!index)
Goto(child.Token(i), nodes.size() - 1, i - 1);
else if(index < 0)
nodes.back().data.back().second = index;
}
}
}
else if(child.Token(0) == "apply")
{
// Don't merge "apply" nodes with any other nodes.
AddNode();
nodes.back().canMergeOnto = false;
nodes.back().conditions.Load(child);
}
else
{
// This is just an ordinary text node.
// If the previous node is a choice, or if the previous node ended
// in a goto, create a new node. Otherwise, just merge this new
// paragraph into the previous node.
if(nodes.empty() || !nodes.back().canMergeOnto)
AddNode();
// Always append a newline to the end of the text.
nodes.back().data.back().first += child.Token(0);
nodes.back().data.back().first += '\n';
// Check whether there is a goto attached to this block of text. If
// so, future nodes can't merge onto this one.
if(LoadGotos(child))
nodes.back().canMergeOnto = false;
}
}
// Display a warning if a label was not resolved.
if(!unresolved.empty())
for(const auto &it : unresolved)
node.PrintTrace("Conversation contains unrecognized label \"" + it.first + "\":");
// Check for any loops in the conversation.
for(const auto &it : labels)
{
int nodeIndex = it.second;
while(nodeIndex >= 0 && Choices(nodeIndex) <= 1)
{
nodeIndex = NextNode(nodeIndex);
if(nodeIndex == it.second)
{
node.PrintTrace("Conversation contains infinite loop beginning with label \"" + it.first + "\":");
nodes.clear();
return;
}
}
}
// Free the working buffers that we no longer need.
labels.clear();
unresolved.clear();
}