paysages3d/src/definition/DefinitionNode.cpp

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#include "DefinitionNode.h"
#include "Logs.h"
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#include "PackStream.h"
#include "DefinitionWatcher.h"
#include "DefinitionDiff.h"
#include "DiffManager.h"
#include <cassert>
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DefinitionNode::DefinitionNode(DefinitionNode* parent, const std::string &name, const std::string &type_name):
parent(parent), type_name(type_name), name(name)
{
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if (parent)
{
root = parent->root;
parent->addChild(this);
diffs = NULL;
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}
else
{
root = this;
diffs = new DiffManager(this);
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}
}
DefinitionNode::~DefinitionNode()
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{
if (parent)
{
parent->removeChild(this);
parent = NULL;
}
if (diffs)
{
delete diffs;
diffs = NULL;
}
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// Work on a copy, because the child destructor will modify the array by removing itself using removeChild
std::vector<DefinitionNode*> children_copy = children;
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for (auto child:children_copy)
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{
if (child->getParent() == this)
{
delete child;
}
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}
}
void DefinitionNode::setName(const std::string &name)
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{
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this->name = name;
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}
Scenery* DefinitionNode::getScenery()
{
if (parent)
{
return parent->getScenery();
}
else
{
return NULL;
}
}
std::string DefinitionNode::toString(int indent) const
{
std::string result;
for (int i = 0; i < indent; i++)
{
result += " ";
}
result += name;
if (not children.empty())
{
for (auto &child: children)
{
result += "\n" + child->toString(indent + 1);
}
}
return result;
}
std::string DefinitionNode::getPath() const
{
if (parent == root)
{
return parent->getPath() + name;
}
else if (parent)
{
return parent->getPath() + "/" + name;
}
else
{
return "/";
}
}
DefinitionNode *DefinitionNode::findByPath(const std::string &path) const
{
if (path.empty())
{
return NULL;
}
else if (path[0] == '/')
{
if (path.length() == 1)
{
return root;
}
else if (root == this)
{
return findByPath(path.substr(1));
}
else
{
return root->findByPath(path);
}
}
else
{
size_t seppos = path.find("/");
std::string child_name = (seppos == std::string::npos) ? path : path.substr(0, seppos);
DefinitionNode *child = ((DefinitionNode *)this)->findChildByName(child_name); // FIXME findChildByName should be const
if (child)
{
if (seppos == std::string::npos)
{
return child;
}
else
{
return child->findByPath(path.substr(seppos + 1));
}
}
else
{
return NULL;
}
}
}
bool DefinitionNode::applyDiff(const DefinitionDiff *diff, bool)
{
// Only do type check, subclasses will do the rest
if (diff->getTypeName() == type_name)
{
return true;
}
else
{
Logs::error() << "Can't apply " << diff->getTypeName() << " diff to " << getName() << " " << type_name << " node" << std::endl;
return false;
}
}
void DefinitionNode::generateInitDiffs(std::vector<const DefinitionDiff *> *) const
{
}
void DefinitionNode::addWatcher(DefinitionWatcher *watcher, bool init_diff)
{
if (root && root->diffs)
{
if (init_diff)
{
std::vector<const DefinitionDiff *> diffs;
generateInitDiffs(&diffs);
for (auto diff: diffs)
{
watcher->nodeChanged(this, diff);
delete diff;
}
}
root->diffs->addWatcher(this, watcher);
}
}
void DefinitionNode::save(PackStream* stream) const
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{
int children_count = (int)children.size();
stream->write(&children_count);
for (auto child: children)
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{
stream->write(child->name);
int child_size = child->getStreamSize();
if (child_size >= 0)
{
stream->write(&child_size);
child->save(stream);
}
else
{
// Child size not known, write it to a temporary stream to know it
Logs::debug() << "Unknown size for child " << child->name << ", unefficient writing to temporary stream" << std::endl;
PackStream substream;
child->save(&substream);
stream->writeFromBuffer(substream, true);
}
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}
}
void DefinitionNode::load(PackStream* stream)
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{
int children_count;
stream->read(&children_count);
for (int i = 0; i < children_count; i++)
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{
std::string child_name = stream->readString();
int child_size;
stream->read(&child_size);
DefinitionNode *child = findChildByName(child_name);
if (child)
{
// TODO type check
child->load(stream);
}
else
{
// TODO Ask subclass if it can instanciate a child
// Else skip length of unknown child
stream->skipBytes(child_size);
Logs::warning() << "Skipped unknown child '" << child_name << "'" << std::endl;
}
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}
}
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void DefinitionNode::copy(DefinitionNode* destination) const
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{
if (destination->getTypeName() == getTypeName())
{
destination->setName(name);
// TODO Copy children ?
}
else
{
Logs::error() << "Can't copy from " << getTypeName() << " to " << destination->getTypeName() << std::endl;
}
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}
void DefinitionNode::validate()
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{
for (auto child: children)
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{
child->validate();
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}
}
void DefinitionNode::addChild(DefinitionNode* child)
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{
if (std::find(children.begin(), children.end(), child) == children.end())
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{
children.push_back(child);
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child->parent = this;
child->root = this->root;
}
}
void DefinitionNode::removeChild(DefinitionNode* child)
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{
std::vector<DefinitionNode*>::iterator it = std::find(children.begin(), children.end(), child);
if (it != children.end())
{
child->parent = NULL;
children.erase(it);
}
else
{
Logs::warning() << "Trying to remove not found child '" << child->name << "' from '" << name << "'" << std::endl;
}
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}
DefinitionNode *DefinitionNode::findChildByName(const std::string name)
{
for (auto child: children)
{
if (child->name == name)
{
return child;
}
}
return NULL;
}
int DefinitionNode::getStreamSize() const
{
return -1;
}
void DefinitionNode::addDiff(const DefinitionDiff *diff)
{
assert(diff->getTypeName() == type_name);
if (root && root->diffs)
{
root->diffs->addDiff(this, diff);
}
}