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/*
* OpenSCAD (www.openscad.org)
* Copyright (C) 2009-2011 Clifford Wolf <clifford@clifford.at> and
* Marius Kintel <marius@kintel.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* As a special exception, you have permission to link this program
* with the CGAL library and distribute executables, as long as you
* follow the requirements of the GNU GPL in regard to all of the
* software in the executable aside from CGAL.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "module.h"
#include "node.h"
#include "context.h"
#include "builtin.h"
#include "printutils.h"
#include <sstream>
enum control_type_e {
CHILD,
ECHO,
ASSIGN,
FOR,
INT_FOR,
IF
};
class ControlModule : public AbstractModule
{
public:
control_type_e type;
ControlModule(control_type_e type) : type(type) { }
virtual AbstractNode *evaluate(const Context *ctx, const ModuleInstantiation *inst) const;
};
void for_eval(AbstractNode &node, const ModuleInstantiation &inst, size_t l,
const std::vector<std::string> &call_argnames,
const std::vector<Value> &call_argvalues,
const Context *arg_context)
{
if (call_argnames.size() > l) {
const std::string &it_name = call_argnames[l];
const Value &it_values = call_argvalues[l];
Context c(arg_context);
if (it_values.type() == Value::RANGE) {
Value::RangeType range = it_values.toRange();
if (range.end < range.begin) {
double t = range.begin;
range.begin = range.end;
range.end = t;
}
if (range.step > 0 && (range.begin-range.end)/range.step < 10000) {
for (double i = range.begin; i <= range.end; i += range.step) {
c.set_variable(it_name, Value(i));
for_eval(node, inst, l+1, call_argnames, call_argvalues, &c);
}
}
}
else if (it_values.type() == Value::VECTOR) {
for (size_t i = 0; i < it_values.toVector().size(); i++) {
c.set_variable(it_name, it_values.toVector()[i]);
for_eval(node, inst, l+1, call_argnames, call_argvalues, &c);
}
}
else if (it_values.type() != Value::UNDEFINED) {
c.set_variable(it_name, it_values);
for_eval(node, inst, l+1, call_argnames, call_argvalues, &c);
}
} else if (l > 0) {
std::vector<AbstractNode *> evaluatednodes = inst.evaluateChildren(arg_context);
node.children.insert(node.children.end(), evaluatednodes.begin(), evaluatednodes.end());
}
}
AbstractNode *ControlModule::evaluate(const Context*, const ModuleInstantiation *inst) const
{
AbstractNode *node = NULL;
if (type == CHILD)
{
size_t n = 0;
if (inst->argvalues.size() > 0) {
double v;
if (inst->argvalues[0].getDouble(v)) {
if (v < 0) return NULL; // Disallow negative child indices
n = trunc(v);
}
}
for (int i = Context::ctx_stack.size()-1; i >= 0; i--) {
const Context *c = Context::ctx_stack[i];
if (c->inst_p) {
if (n < c->inst_p->children.size()) {
node = c->inst_p->children[n]->evaluate(c->inst_p->ctx);
// FIXME: We'd like to inherit any tags from the ModuleInstantiation
// given as parameter to this method. However, the instantition which belongs
// to the returned node cannot be changed. This causes the test
// features/child-background.scad to fail.
}
return node;
}
c = c->parent;
}
return NULL;
}
if (type == INT_FOR)
node = new AbstractIntersectionNode(inst);
else
node = new AbstractNode(inst);
if (type == ECHO)
{
std::stringstream msg;
msg << "ECHO: ";
for (size_t i = 0; i < inst->argnames.size(); i++) {
if (i > 0) msg << ", ";
if (!inst->argnames[i].empty()) msg << inst->argnames[i] << " = ";
msg << inst->argvalues[i];
}
PRINTB("%s", msg.str());
}
if (type == ASSIGN)
{
Context c(inst->ctx);
for (size_t i = 0; i < inst->argnames.size(); i++) {
if (!inst->argnames[i].empty())
c.set_variable(inst->argnames[i], inst->argvalues[i]);
}
std::vector<AbstractNode *> evaluatednodes = inst->evaluateChildren(&c);
node->children.insert(node->children.end(), evaluatednodes.begin(), evaluatednodes.end());
}
if (type == FOR || type == INT_FOR)
{
for_eval(*node, *inst, 0, inst->argnames, inst->argvalues, inst->ctx);
}
if (type == IF)
{
const IfElseModuleInstantiation *ifelse = dynamic_cast<const IfElseModuleInstantiation*>(inst);
if (ifelse->argvalues.size() > 0 && ifelse->argvalues[0].toBool()) {
std::vector<AbstractNode *> evaluatednodes = ifelse->evaluateChildren();
node->children.insert(node->children.end(), evaluatednodes.begin(), evaluatednodes.end());
}
else {
std::vector<AbstractNode *> evaluatednodes = ifelse->evaluateElseChildren();
node->children.insert(node->children.end(), evaluatednodes.begin(), evaluatednodes.end());
}
}
return node;
}
void register_builtin_control()
{
Builtins::init("child", new ControlModule(CHILD));
Builtins::init("echo", new ControlModule(ECHO));
Builtins::init("assign", new ControlModule(ASSIGN));
Builtins::init("for", new ControlModule(FOR));
Builtins::init("intersection_for", new ControlModule(INT_FOR));
Builtins::init("if", new ControlModule(IF));
}
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