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#include <stdio.h>
#include <string.h>
#include <expat.h>
#include "event.h"
#include "main/curve.h"
#include "main/linearcurve.h"
#include "main/autosplinecurve.h"
#include "main/linecurve.h"
#include "exception.h"
#include "demolib_prefs.h"
#if DEMOLIB_MAINLOOP
Event::Event(MainLoop *ml, const char *title, const char *elem, Hashtable *attr, char *curvenames)
{
int curve_type = CURVE_NONE;
this->start = -1.0f;
this->stop = -1.0f;
this->active = false;
this->title = strdup(title);
if (attr->exists("layer")) {
this->layer = attr->get_float("layer");
} else {
this->layer = 0.0f;
}
this->curves = NULL;
if (attr->exists("curve")) {
const char * const ctstr = (const char * const)(attr->lookup("curve"));
if (strcmp(ctstr, "linear") == 0) {
curve_type = CURVE_LINEAR;
}
if (strcmp(ctstr, "autospline") == 0) {
curve_type = CURVE_AUTOSPLINE;
}
if (strcmp(ctstr, "line") == 0) {
curve_type = CURVE_LINE;
}
if (curve_type == CURVE_NONE) {
throw new FatalException(ctstr, "Invalid curve type.");
}
}
if (curvenames == NULL || strcmp(curvenames, "") == 0) return;
if (curve_type == CURVE_NONE) {
throw new FatalException(elem, "No curve type specified.");
}
this->curves = new Hashtable(true);
/* now create a set of attribute curves */
char *cn = strdup(curvenames);
char *curve = strtok(cn, ":");
do {
Curve *c = NULL;
switch (curve_type) {
case CURVE_LINEAR:
c = new LinearCurve();
break;
case CURVE_AUTOSPLINE:
c = new AutoSplineCurve();
break;
case CURVE_LINE:
c = new LineCurve();
break;
}
this->curves->insert(curve, c);
} while ((curve = strtok(NULL, ":")) != NULL);
free(cn);
this->ml = ml;
}
Event::~Event()
{
free(this->title);
/* free the hash tables for the curves */
if (this->curves != NULL) {
this->curves->destroy_values();
delete this->curves;
this->curves = NULL;
}
}
void Event::add_curvepoint(Hashtable *markers, const char *element, const char **attr)
{
float timeval = -1.0f;
/* first we need to grab the time */
int i = 0;
while (attr[i]) {
if (strcmp(attr[i], "time") == 0) {
timeval = parse_time(markers, attr[i + 1]);
break;
}
i += 2;
}
if (timeval == -1.0f) {
throw new FatalException(element, "Missing time= attribute");
}
if (strcmp(element, "start") == 0) {
if (this->start != -1.0f) {
throw new FatalException(element, "Multiple <start> tags");
}
this->start = timeval;
}
if (strcmp(element, "end") == 0) {
if (this->stop != -1.0f) {
throw new FatalException(element, "Multiple <end> tags");
}
this->stop = timeval;
}
i = 0;
while (attr[i]) {
if (strcmp(attr[i], "time") == 0) {
i += 2;
continue;
}
if (this->curves == NULL) {
throw new FatalException(attr[i], "No such curve!");
}
Curve *c = (Curve *)this->curves->lookup(attr[i]);
if (c == NULL) {
throw new FatalException(attr[i], "No such curve!");
}
c->add_curvepoint(timeval, atof(attr[i + 1]));
i += 2;
}
}
void Event::end_curvedata()
{
if (this->start == -1.0f) {
throw new FatalException("Missing <start> tag!");
}
if (this->stop == -1.0f) {
throw new FatalException("Missing <end> tag!");
}
if (this->curves != NULL) {
this->curves->finish_curvedata(this->start, this->stop);
}
}
void Event::start_effect() {}
void Event::draw_scene(float progress) {}
void Event::end_effect() {}
float Event::get_val(char *attr_name, float progress)
{
if (this->curves == NULL) {
throw new FatalException(attr_name, "No curves defined in effect!");
}
Curve *c = (Curve *)this->curves->lookup(attr_name);
if (c == NULL) {
throw new FatalException(attr_name, "No such curve defined!");
}
return c->get_value(progress);
}
float Event::parse_time(Hashtable *markers, const char *timestr)
{
if (timestr[0] < '0' || timestr[0] > '9') {
/* a marker name -- does it contain a '-' or '+'? */
char buf[256];
float adj;
strcpy(buf, timestr);
unsigned int p = strcspn(buf, "-+");
if (p == strlen(buf)) {
adj = 0.0f;
} else {
if (buf[p] == '+') {
adj = atof(buf + p + 1);
} else {
adj = atof(buf + p);
}
buf[p] = '\0';
}
void *f = markers->lookup(buf);
if (f == NULL) {
throw new FatalException(buf, "No such marker.");
}
return *((float *)f) + adj;
} else {
return atof(timestr);
}
}
#endif
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