-// fg_props.cxx -- support for
+// fg_props.cxx -- support for FlightGear properties.
//
-// Written by David Megginson, started November 1999.
+// Written by David Megginson, started 2000.
//
-// Copyright (C) 1999, 2000 David Megginson - david@megginson.com
+// Copyright (C) 2000, 2001 David Megginson - david@megginson.com
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
//
// $Id$
-#include <iostream>
+#ifdef HAVE_CONFIG_H
+# include <simgear/compiler.h>
+#endif
-#include <Main/fgfs.hxx>
+#include <simgear/misc/exception.hxx>
+#include <simgear/magvar/magvar.hxx>
+#include <simgear/timing/sg_time.hxx>
+#include <simgear/misc/sg_path.hxx>
+
+#include STL_IOSTREAM
+
+#include <ATC/ATCdisplay.hxx>
+#include <Aircraft/aircraft.hxx>
+#include <Time/tmp.hxx>
+#include <FDM/UIUCModel/uiuc_aircraftdir.h>
+#ifdef FG_WEATHERCM
+# include <WeatherCM/FGLocalWeatherDatabase.h>
+#else
+# include <Environment/environment.hxx>
+#endif // FG_WEATHERCM
+#include <Objects/matlib.hxx>
+
+#include <GUI/gui.h>
+#include <Sound/soundmgr.hxx>
+
+#include "globals.hxx"
+#include "fgfs.hxx"
#include "fg_props.hxx"
-using std::istream;
-using std::ostream;
+SG_USING_STD(istream);
+SG_USING_STD(ostream);
+
+#ifdef FG_WEATHERCM
+static double getWindNorth ();
+static double getWindEast ();
+static double getWindDown ();
+#endif // FG_WEATHERCM
+
+static bool winding_ccw = true; // FIXME: temporary
+
+static bool fdm_data_logging = false; // FIXME: temporary
+
+static bool frozen = false; // FIXME: temporary
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Default property bindings (not yet handled by any module).
+////////////////////////////////////////////////////////////////////////
+
+struct LogClassMapping {
+ sgDebugClass c;
+ string name;
+ LogClassMapping(sgDebugClass cc, string nname) { c = cc; name = nname; }
+};
+
+LogClassMapping log_class_mappings [] = {
+ LogClassMapping(SG_NONE, "none"),
+ LogClassMapping(SG_TERRAIN, "terrain"),
+ LogClassMapping(SG_ASTRO, "astro"),
+ LogClassMapping(SG_FLIGHT, "flight"),
+ LogClassMapping(SG_INPUT, "input"),
+ LogClassMapping(SG_GL, "gl"),
+ LogClassMapping(SG_VIEW, "view"),
+ LogClassMapping(SG_COCKPIT, "cockpit"),
+ LogClassMapping(SG_GENERAL, "general"),
+ LogClassMapping(SG_MATH, "math"),
+ LogClassMapping(SG_EVENT, "event"),
+ LogClassMapping(SG_AIRCRAFT, "aircraft"),
+ LogClassMapping(SG_AUTOPILOT, "autopilot"),
+ LogClassMapping(SG_IO, "io"),
+ LogClassMapping(SG_CLIPPER, "clipper"),
+ LogClassMapping(SG_NETWORK, "network"),
+ LogClassMapping(SG_UNDEFD, "")
+};
+
+
+/**
+ * Get the logging classes.
+ */
+static const char *
+getLoggingClasses ()
+{
+ sgDebugClass classes = logbuf::get_log_classes();
+ static string result = ""; // FIXME
+ for (int i = 0; log_class_mappings[i].c != SG_UNDEFD; i++) {
+ if ((classes&log_class_mappings[i].c) > 0) {
+ if (!result.empty())
+ result += '|';
+ result += log_class_mappings[i].name;
+ }
+ }
+ return result.c_str();
+}
+
+
+static void
+addLoggingClass (const string &name)
+{
+ sgDebugClass classes = logbuf::get_log_classes();
+ for (int i = 0; log_class_mappings[i].c != SG_UNDEFD; i++) {
+ if (name == log_class_mappings[i].name) {
+ logbuf::set_log_classes(sgDebugClass(classes|log_class_mappings[i].c));
+ return;
+ }
+ }
+ SG_LOG(SG_GENERAL, SG_ALERT, "Unknown logging class: " << name);
+}
+
+
+/**
+ * Set the logging classes.
+ */
+static void
+setLoggingClasses (const char * c)
+{
+ string classes = c;
+ logbuf::set_log_classes(SG_NONE);
+
+ if (classes == "none") {
+ SG_LOG(SG_GENERAL, SG_INFO, "Disabled all logging classes");
+ return;
+ }
+
+ if (classes.empty() || classes == "all") { // default
+ logbuf::set_log_classes(SG_ALL);
+ SG_LOG(SG_GENERAL, SG_INFO, "Enabled all logging classes: "
+ << getLoggingClasses());
+ return;
+ }
+
+ string rest = classes;
+ string name = "";
+ int sep = rest.find('|');
+ while (sep > 0) {
+ name = rest.substr(0, sep);
+ rest = rest.substr(sep+1);
+ addLoggingClass(name);
+ sep = rest.find('|');
+ }
+ addLoggingClass(rest);
+ SG_LOG(SG_GENERAL, SG_INFO, "Set logging classes to "
+ << getLoggingClasses());
+}
+
+
+/**
+ * Get the logging priority.
+ */
+static const char *
+getLoggingPriority ()
+{
+ switch (logbuf::get_log_priority()) {
+ case SG_BULK:
+ return "bulk";
+ case SG_DEBUG:
+ return "debug";
+ case SG_INFO:
+ return "info";
+ case SG_WARN:
+ return "warn";
+ case SG_ALERT:
+ return "alert";
+ default:
+ SG_LOG(SG_GENERAL, SG_WARN, "Internal: Unknown logging priority number: "
+ << logbuf::get_log_priority());
+ return "unknown";
+ }
+}
+
+
+/**
+ * Set the logging priority.
+ */
+static void
+setLoggingPriority (const char * p)
+{
+ string priority = p;
+ if (priority == "bulk") {
+ logbuf::set_log_priority(SG_BULK);
+ } else if (priority == "debug") {
+ logbuf::set_log_priority(SG_DEBUG);
+ } else if (priority.empty() || priority == "info") { // default
+ logbuf::set_log_priority(SG_INFO);
+ } else if (priority == "warn") {
+ logbuf::set_log_priority(SG_WARN);
+ } else if (priority == "alert") {
+ logbuf::set_log_priority(SG_ALERT);
+ } else {
+ SG_LOG(SG_GENERAL, SG_WARN, "Unknown logging priority " << priority);
+ }
+ SG_LOG(SG_GENERAL, SG_INFO, "Logging priority is " << getLoggingPriority());
+}
+
+
+/**
+ * Return the current frozen state.
+ */
+static bool
+getFreeze ()
+{
+ return frozen;
+}
+
+
+/**
+ * Set the current frozen state.
+ */
+static void
+setFreeze (bool f)
+{
+ frozen = f;
+
+ // Stop sound on a pause
+ FGSoundMgr *s = globals->get_soundmgr();
+ if ( s != NULL ) {
+ if ( f ) {
+ s->pause();
+ } else {
+ s->resume();
+ }
+ }
+}
+
+
+/**
+ * Return the current aircraft directory (UIUC) as a string.
+ */
+static const char *
+getAircraftDir ()
+{
+ return aircraft_dir.c_str();
+}
+
+
+/**
+ * Set the current aircraft directory (UIUC).
+ */
+static void
+setAircraftDir (const char * dir)
+{
+ aircraft_dir = dir;
+}
+
+
+/**
+ * Return the number of milliseconds elapsed since simulation started.
+ */
+static double
+getElapsedTime_sec ()
+{
+ return globals->get_sim_time_sec();
+}
+
+
+/**
+ * Return the current Zulu time.
+ */
+static const char *
+getDateString ()
+{
+ static char buf[64]; // FIXME
+ struct tm * t = globals->get_time_params()->getGmt();
+ sprintf(buf, "%.4d-%.2d-%.2dT%.2d:%.2d:%.2d",
+ t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
+ t->tm_hour, t->tm_min, t->tm_sec);
+ return buf;
+}
+
+
+/**
+ * Set the current Zulu time.
+ */
+static void
+setDateString (const char * date_string)
+{
+ static const SGPropertyNode *cur_time_override
+ = fgGetNode("/sim/time/cur-time-override", true);
+
+ SGTime * st = globals->get_time_params();
+ struct tm * current_time = st->getGmt();
+ struct tm new_time;
+
+ // Scan for basic ISO format
+ // YYYY-MM-DDTHH:MM:SS
+ int ret = sscanf(date_string, "%d-%d-%dT%d:%d:%d",
+ &(new_time.tm_year), &(new_time.tm_mon),
+ &(new_time.tm_mday), &(new_time.tm_hour),
+ &(new_time.tm_min), &(new_time.tm_sec));
+
+ // Be pretty picky about this, so
+ // that strange things don't happen
+ // if the save file has been edited
+ // by hand.
+ if (ret != 6) {
+ SG_LOG(SG_INPUT, SG_ALERT, "Date/time string " << date_string
+ << " not in YYYY-MM-DDTHH:MM:SS format; skipped");
+ return;
+ }
+
+ // OK, it looks like we got six
+ // values, one way or another.
+ new_time.tm_year -= 1900;
+ new_time.tm_mon -= 1;
+
+ // Now, tell flight gear to use
+ // the new time. This was far
+ // too difficult, by the way.
+ long int warp =
+ mktime(&new_time) - mktime(current_time) + globals->get_warp();
+ double lon = current_aircraft.fdm_state->get_Longitude();
+ double lat = current_aircraft.fdm_state->get_Latitude();
+ globals->set_warp(warp);
+ st->update(lon, lat, cur_time_override->getLongValue(), warp);
+ fgUpdateSkyAndLightingParams();
+}
+
+/**
+ * Return the GMT as a string.
+ */
+static const char *
+getGMTString ()
+{
+ static char buf[16]; // FIXME
+ struct tm *t = globals->get_time_params()->getGmt();
+ sprintf(buf, " %.2d:%.2d:%.2d",
+ t->tm_hour, t->tm_min, t->tm_sec);
+ // cout << t << " " << buf << endl;
+ return buf;
+}
+
+
+/**
+ * Get the texture rendering state.
+ */
+static bool
+getTextures ()
+{
+ return (material_lib.get_step() == 0);
+}
+
+
+/**
+ * Set the texture rendering state.
+ */
+static void
+setTextures (bool textures)
+{
+ if (textures)
+ material_lib.set_step(0);
+ else
+ material_lib.set_step(1);
+}
+
+
+/**
+ * Return the magnetic variation
+ */
+static double
+getMagVar ()
+{
+ return globals->get_mag()->get_magvar() * SGD_RADIANS_TO_DEGREES;
+}
+
+
+/**
+ * Return the magnetic dip
+ */
+static double
+getMagDip ()
+{
+ return globals->get_mag()->get_magdip() * SGD_RADIANS_TO_DEGREES;
+}
+
+
+/**
+ * Return the current heading in degrees.
+ */
+static double
+getHeadingMag ()
+{
+ return current_aircraft.fdm_state->get_Psi() * SGD_RADIANS_TO_DEGREES - getMagVar();
+}
+
+
+#ifdef FG_WEATHERCM
+
+/**
+ * Get the current visibility (meters).
+ */
+static double
+getVisibility ()
+{
+ return WeatherDatabase->getWeatherVisibility();
+}
+
+
+/**
+ * Set the current visibility (meters).
+ */
+static void
+setVisibility (double visibility)
+{
+ WeatherDatabase->setWeatherVisibility(visibility);
+}
+
+/**
+ * Get the current wind north velocity (feet/second).
+ */
+static double
+getWindNorth ()
+{
+ return current_aircraft.fdm_state->get_V_north_airmass();
+}
+
+
+/**
+ * Set the current wind north velocity (feet/second).
+ */
+static void
+setWindNorth (double speed)
+{
+ current_aircraft.fdm_state
+ ->set_Velocities_Local_Airmass(speed, getWindEast(), getWindDown());
+}
+
+
+/**
+ * Get the current wind east velocity (feet/second).
+ */
+static double
+getWindEast ()
+{
+ return current_aircraft.fdm_state->get_V_east_airmass();
+}
+
+
+/**
+ * Set the current wind east velocity (feet/second).
+ */
+static void
+setWindEast (double speed)
+{
+ SG_LOG(SG_GENERAL, SG_INFO,, "Set wind-east to " << speed );
+ current_aircraft.fdm_state->set_Velocities_Local_Airmass(getWindNorth(),
+ speed,
+ getWindDown());
+}
+
+
+/**
+ * Get the current wind down velocity (feet/second).
+ */
+static double
+getWindDown ()
+{
+ return current_aircraft.fdm_state->get_V_down_airmass();
+}
+
+
+/**
+ * Set the current wind down velocity (feet/second).
+ */
+static void
+setWindDown (double speed)
+{
+ current_aircraft.fdm_state->set_Velocities_Local_Airmass(getWindNorth(),
+ getWindEast(),
+ speed);
+}
+
+#endif // FG_WEATHERCM
+
+static long
+getWarp ()
+{
+ return globals->get_warp();
+}
+
+static void
+setWarp (long warp)
+{
+ globals->set_warp(warp);
+}
+
+static long
+getWarpDelta ()
+{
+ return globals->get_warp_delta();
+}
+
+static void
+setWarpDelta (long delta)
+{
+ globals->set_warp_delta(delta);
+}
+
+static bool
+getWindingCCW ()
+{
+ return winding_ccw;
+}
+
+static void
+setWindingCCW (bool state)
+{
+ winding_ccw = state;
+ if ( winding_ccw )
+ glFrontFace ( GL_CCW );
+ else
+ glFrontFace ( GL_CW );
+}
+
+static bool
+getFullScreen ()
+{
+#if defined(FX) && !defined(WIN32)
+ return globals->get_fullscreen();
+#else
+ return false;
+#endif
+}
+
+static void
+setFullScreen (bool state)
+{
+#if defined(FX) && !defined(WIN32)
+ globals->set_fullscreen(state);
+# if defined(XMESA_FX_FULLSCREEN) && defined(XMESA_FX_WINDOW)
+ XMesaSetFXmode( state ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW );
+# endif
+#endif
+}
+
+static bool
+getFDMDataLogging ()
+{
+ return fdm_data_logging;
+}
+
+static void
+setFDMDataLogging (bool state)
+{
+ // kludge; no getter or setter available
+ if (state != fdm_data_logging) {
+ fgToggleFDMdataLogging();
+ fdm_data_logging = state;
+ }
+}
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Tie the properties.
+////////////////////////////////////////////////////////////////////////
+
+void
+fgInitProps ()
+{
+ SG_LOG(SG_GENERAL, SG_DEBUG, "start of fgInitProps()" );
+ // Simulation
+ fgTie("/sim/logging/priority", getLoggingPriority, setLoggingPriority);
+ fgTie("/sim/logging/classes", getLoggingClasses, setLoggingClasses);
+ fgTie("/sim/freeze/master", getFreeze, setFreeze);
+ fgTie("/sim/aircraft-dir", getAircraftDir, setAircraftDir);
+
+ fgTie("/sim/time/elapsed-sec", getElapsedTime_sec);
+ fgTie("/sim/time/gmt", getDateString, setDateString);
+ fgSetArchivable("/sim/time/gmt");
+ fgTie("/sim/time/gmt-string", getGMTString);
+ fgTie("/sim/rendering/textures", getTextures, setTextures);
+
+ // Orientation
+ fgTie("/orientation/heading-magnetic-deg", getHeadingMag);
+
+ // Environment
+#ifdef FG_WEATHERCM
+ fgTie("/environment/visibility-m", getVisibility, setVisibility);
+ fgSetArchivable("/environment/visibility-m");
+ fgTie("/environment/wind-from-north-fps", getWindNorth, setWindNorth);
+ fgSetArchivable("/environment/wind-from-north-fps");
+ fgTie("/environment/wind-from-east-fps", getWindEast, setWindEast);
+ fgSetArchivable("/environment/wind-from-east-fps");
+ fgTie("/environment/wind-from-down-fps", getWindDown, setWindDown);
+ fgSetArchivable("/environment/wind-from-down-fps");
+#endif
+
+ fgTie("/environment/magnetic-variation-deg", getMagVar);
+ fgTie("/environment/magnetic-dip-deg", getMagDip);
+
+ fgTie("/sim/time/warp", getWarp, setWarp, false);
+ fgTie("/sim/time/warp-delta", getWarpDelta, setWarpDelta);
+
+ // Misc. Temporary junk.
+ fgTie("/sim/temp/winding-ccw", getWindingCCW, setWindingCCW, false);
+ fgTie("/sim/temp/full-screen", getFullScreen, setFullScreen);
+ fgTie("/sim/temp/fdm-data-logging", getFDMDataLogging, setFDMDataLogging);
+
+ SG_LOG(SG_GENERAL, SG_DEBUG, "end of fgInitProps()" );
+}
+
+
+void
+fgUpdateProps ()
+{
+}
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Save and restore.
+////////////////////////////////////////////////////////////////////////
/**
* Save the current state of the simulator to a stream.
*/
bool
-fgSaveFlight (ostream &output)
+fgSaveFlight (ostream &output, bool write_all)
{
- return writeProperties(output, globals->get_props());
+
+ fgSetBool("/sim/presets/onground", false);
+ fgSetArchivable("/sim/presets/onground");
+ fgSetBool("/sim/presets/trim", false);
+ fgSetArchivable("/sim/presets/trim");
+ fgSetString("/sim/presets/speed-set", "UVW");
+ fgSetArchivable("/sim/presets/speed-set");
+
+ try {
+ writeProperties(output, globals->get_props(), write_all);
+ } catch (const sg_exception &e) {
+ guiErrorMessage("Error saving flight: ", e);
+ return false;
+ }
+ return true;
}
fgLoadFlight (istream &input)
{
SGPropertyNode props;
- if (readProperties(input, &props)) {
- copyProperties(&props, globals->get_props());
- // When loading a flight, make it the
- // new initial state.
- globals->saveInitialState();
- } else {
- FG_LOG(FG_INPUT, FG_ALERT, "Error restoring flight; aborted");
+ try {
+ readProperties(input, &props);
+ } catch (const sg_exception &e) {
+ guiErrorMessage("Error reading saved flight: ", e);
return false;
}
+
+ fgSetBool("/sim/presets/onground", false);
+ fgSetBool("/sim/presets/trim", false);
+ fgSetString("/sim/presets/speed-set", "UVW");
+
+ copyProperties(&props, globals->get_props());
+ // When loading a flight, make it the
+ // new initial state.
+ globals->saveInitialState();
+ return true;
}
-// end of fg_props.cxx
+bool
+fgLoadProps (const char * path, SGPropertyNode * props, bool in_fg_root)
+{
+ string fullpath;
+ if (in_fg_root) {
+ SGPath loadpath(globals->get_fg_root());
+ loadpath.append(path);
+ fullpath = loadpath.str();
+ } else {
+ fullpath = path;
+ }
+
+ try {
+ readProperties(fullpath, props);
+ } catch (const sg_exception &e) {
+ guiErrorMessage("Error reading properties: ", e);
+ return false;
+ }
+ return true;
+}
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Property convenience functions.
+////////////////////////////////////////////////////////////////////////
+
+SGPropertyNode *
+fgGetNode (const char * path, bool create)
+{
+ return globals->get_props()->getNode(path, create);
+}
+
+SGPropertyNode *
+fgGetNode (const char * path, int index, bool create)
+{
+ return globals->get_props()->getNode(path, index, create);
+}
+
+bool
+fgHasNode (const char * path)
+{
+ return (fgGetNode(path, false) != 0);
+}
+
+void
+fgAddChangeListener (SGPropertyChangeListener * listener, const char * path)
+{
+ fgGetNode(path, true)->addChangeListener(listener);
+}
+
+void
+fgAddChangeListener (SGPropertyChangeListener * listener,
+ const char * path, int index)
+{
+ fgGetNode(path, index, true)->addChangeListener(listener);
+}
+
+bool
+fgGetBool (const char * name, bool defaultValue)
+{
+ return globals->get_props()->getBoolValue(name, defaultValue);
+}
+
+int
+fgGetInt (const char * name, int defaultValue)
+{
+ return globals->get_props()->getIntValue(name, defaultValue);
+}
+
+int
+fgGetLong (const char * name, long defaultValue)
+{
+ return globals->get_props()->getLongValue(name, defaultValue);
+}
+
+float
+fgGetFloat (const char * name, float defaultValue)
+{
+ return globals->get_props()->getFloatValue(name, defaultValue);
+}
+
+double
+fgGetDouble (const char * name, double defaultValue)
+{
+ return globals->get_props()->getDoubleValue(name, defaultValue);
+}
+
+const char *
+fgGetString (const char * name, const char * defaultValue)
+{
+ return globals->get_props()->getStringValue(name, defaultValue);
+}
+
+bool
+fgSetBool (const char * name, bool val)
+{
+ return globals->get_props()->setBoolValue(name, val);
+}
+
+bool
+fgSetInt (const char * name, int val)
+{
+ return globals->get_props()->setIntValue(name, val);
+}
+
+bool
+fgSetLong (const char * name, long val)
+{
+ return globals->get_props()->setLongValue(name, val);
+}
+
+bool
+fgSetFloat (const char * name, float val)
+{
+ return globals->get_props()->setFloatValue(name, val);
+}
+
+bool
+fgSetDouble (const char * name, double val)
+{
+ return globals->get_props()->setDoubleValue(name, val);
+}
+
+bool
+fgSetString (const char * name, const char * val)
+{
+ return globals->get_props()->setStringValue(name, val);
+}
+
+void
+fgSetArchivable (const char * name, bool state)
+{
+ SGPropertyNode * node = globals->get_props()->getNode(name);
+ if (node == 0)
+ SG_LOG(SG_GENERAL, SG_ALERT,
+ "Attempt to set archive flag for non-existant property "
+ << name);
+ else
+ node->setAttribute(SGPropertyNode::ARCHIVE, state);
+}
+
+void
+fgSetReadable (const char * name, bool state)
+{
+ SGPropertyNode * node = globals->get_props()->getNode(name);
+ if (node == 0)
+ SG_LOG(SG_GENERAL, SG_ALERT,
+ "Attempt to set read flag for non-existant property "
+ << name);
+ else
+ node->setAttribute(SGPropertyNode::READ, state);
+}
+
+void
+fgSetWritable (const char * name, bool state)
+{
+ SGPropertyNode * node = globals->get_props()->getNode(name);
+ if (node == 0)
+ SG_LOG(SG_GENERAL, SG_ALERT,
+ "Attempt to set write flag for non-existant property "
+ << name);
+ else
+ node->setAttribute(SGPropertyNode::WRITE, state);
+}
+
+void
+fgUntie (const char * name)
+{
+ if (!globals->get_props()->untie(name))
+ SG_LOG(SG_GENERAL, SG_WARN, "Failed to untie property " << name);
+}
+
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Implementation of FGCondition.
+////////////////////////////////////////////////////////////////////////
+
+FGCondition::FGCondition ()
+{
+}
+
+FGCondition::~FGCondition ()
+{
+}
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Implementation of FGPropertyCondition.
+////////////////////////////////////////////////////////////////////////
+
+FGPropertyCondition::FGPropertyCondition (const char * propname)
+ : _node(fgGetNode(propname, true))
+{
+}
+
+FGPropertyCondition::~FGPropertyCondition ()
+{
+}
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Implementation of FGNotCondition.
+////////////////////////////////////////////////////////////////////////
+
+FGNotCondition::FGNotCondition (FGCondition * condition)
+ : _condition(condition)
+{
+}
+
+FGNotCondition::~FGNotCondition ()
+{
+ delete _condition;
+}
+
+bool
+FGNotCondition::test () const
+{
+ return !(_condition->test());
+}
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Implementation of FGAndCondition.
+////////////////////////////////////////////////////////////////////////
+
+FGAndCondition::FGAndCondition ()
+{
+}
+
+FGAndCondition::~FGAndCondition ()
+{
+ for (unsigned int i = 0; i < _conditions.size(); i++)
+ delete _conditions[i];
+}
+
+bool
+FGAndCondition::test () const
+{
+ int nConditions = _conditions.size();
+ for (int i = 0; i < nConditions; i++) {
+ if (!_conditions[i]->test())
+ return false;
+ }
+ return true;
+}
+
+void
+FGAndCondition::addCondition (FGCondition * condition)
+{
+ _conditions.push_back(condition);
+}
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Implementation of FGOrCondition.
+////////////////////////////////////////////////////////////////////////
+
+FGOrCondition::FGOrCondition ()
+{
+}
+
+FGOrCondition::~FGOrCondition ()
+{
+ for (unsigned int i = 0; i < _conditions.size(); i++)
+ delete _conditions[i];
+}
+
+bool
+FGOrCondition::test () const
+{
+ int nConditions = _conditions.size();
+ for (int i = 0; i < nConditions; i++) {
+ if (_conditions[i]->test())
+ return true;
+ }
+ return false;
+}
+
+void
+FGOrCondition::addCondition (FGCondition * condition)
+{
+ _conditions.push_back(condition);
+}
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Implementation of FGComparisonCondition.
+////////////////////////////////////////////////////////////////////////
+
+static int
+doComparison (const SGPropertyNode * left, const SGPropertyNode *right)
+{
+ switch (left->getType()) {
+ case SGPropertyNode::BOOL: {
+ bool v1 = left->getBoolValue();
+ bool v2 = right->getBoolValue();
+ if (v1 < v2)
+ return FGComparisonCondition::LESS_THAN;
+ else if (v1 > v2)
+ return FGComparisonCondition::GREATER_THAN;
+ else
+ return FGComparisonCondition::EQUALS;
+ break;
+ }
+ case SGPropertyNode::INT: {
+ int v1 = left->getIntValue();
+ int v2 = right->getIntValue();
+ if (v1 < v2)
+ return FGComparisonCondition::LESS_THAN;
+ else if (v1 > v2)
+ return FGComparisonCondition::GREATER_THAN;
+ else
+ return FGComparisonCondition::EQUALS;
+ break;
+ }
+ case SGPropertyNode::LONG: {
+ long v1 = left->getLongValue();
+ long v2 = right->getLongValue();
+ if (v1 < v2)
+ return FGComparisonCondition::LESS_THAN;
+ else if (v1 > v2)
+ return FGComparisonCondition::GREATER_THAN;
+ else
+ return FGComparisonCondition::EQUALS;
+ break;
+ }
+ case SGPropertyNode::FLOAT: {
+ float v1 = left->getFloatValue();
+ float v2 = right->getFloatValue();
+ if (v1 < v2)
+ return FGComparisonCondition::LESS_THAN;
+ else if (v1 > v2)
+ return FGComparisonCondition::GREATER_THAN;
+ else
+ return FGComparisonCondition::EQUALS;
+ break;
+ }
+ case SGPropertyNode::DOUBLE: {
+ double v1 = left->getDoubleValue();
+ double v2 = right->getDoubleValue();
+ if (v1 < v2)
+ return FGComparisonCondition::LESS_THAN;
+ else if (v1 > v2)
+ return FGComparisonCondition::GREATER_THAN;
+ else
+ return FGComparisonCondition::EQUALS;
+ break;
+ }
+ case SGPropertyNode::STRING:
+ case SGPropertyNode::NONE:
+ case SGPropertyNode::UNSPECIFIED: {
+ string v1 = left->getStringValue();
+ string v2 = right->getStringValue();
+ if (v1 < v2)
+ return FGComparisonCondition::LESS_THAN;
+ else if (v1 > v2)
+ return FGComparisonCondition::GREATER_THAN;
+ else
+ return FGComparisonCondition::EQUALS;
+ break;
+ }
+ }
+ throw sg_exception("Unrecognized node type");
+ return 0;
+}
+
+
+FGComparisonCondition::FGComparisonCondition (Type type, bool reverse)
+ : _type(type),
+ _reverse(reverse),
+ _left_property(0),
+ _right_property(0),
+ _right_value(0)
+{
+}
+
+FGComparisonCondition::~FGComparisonCondition ()
+{
+ delete _right_value;
+}
+
+bool
+FGComparisonCondition::test () const
+{
+ // Always fail if incompletely specified
+ if (_left_property == 0 ||
+ (_right_property == 0 && _right_value == 0))
+ return false;
+
+ // Get LESS_THAN, EQUALS, or GREATER_THAN
+ int cmp =
+ doComparison(_left_property,
+ (_right_property != 0 ? _right_property : _right_value));
+ if (!_reverse)
+ return (cmp == _type);
+ else
+ return (cmp != _type);
+}
+
+void
+FGComparisonCondition::setLeftProperty (const char * propname)
+{
+ _left_property = fgGetNode(propname, true);
+}
+
+void
+FGComparisonCondition::setRightProperty (const char * propname)
+{
+ delete _right_value;
+ _right_value = 0;
+ _right_property = fgGetNode(propname, true);
+}
+
+void
+FGComparisonCondition::setRightValue (const SGPropertyNode *node)
+{
+ _right_property = 0;
+ delete _right_value;
+ _right_value = new SGPropertyNode(*node);
+}
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Read a condition and use it if necessary.
+////////////////////////////////////////////////////////////////////////
+
+ // Forward declaration
+static FGCondition * readCondition (const SGPropertyNode * node);
+
+static FGCondition *
+readPropertyCondition (const SGPropertyNode * node)
+{
+ return new FGPropertyCondition(node->getStringValue());
+}
+
+static FGCondition *
+readNotCondition (const SGPropertyNode * node)
+{
+ int nChildren = node->nChildren();
+ for (int i = 0; i < nChildren; i++) {
+ const SGPropertyNode * child = node->getChild(i);
+ FGCondition * condition = readCondition(child);
+ if (condition != 0)
+ return new FGNotCondition(condition);
+ }
+ SG_LOG(SG_COCKPIT, SG_ALERT, "Panel: empty 'not' condition");
+ return 0;
+}
+
+static FGCondition *
+readAndConditions (const SGPropertyNode * node)
+{
+ FGAndCondition * andCondition = new FGAndCondition;
+ int nChildren = node->nChildren();
+ for (int i = 0; i < nChildren; i++) {
+ const SGPropertyNode * child = node->getChild(i);
+ FGCondition * condition = readCondition(child);
+ if (condition != 0)
+ andCondition->addCondition(condition);
+ }
+ return andCondition;
+}
+
+static FGCondition *
+readOrConditions (const SGPropertyNode * node)
+{
+ FGOrCondition * orCondition = new FGOrCondition;
+ int nChildren = node->nChildren();
+ for (int i = 0; i < nChildren; i++) {
+ const SGPropertyNode * child = node->getChild(i);
+ FGCondition * condition = readCondition(child);
+ if (condition != 0)
+ orCondition->addCondition(condition);
+ }
+ return orCondition;
+}
+
+static FGCondition *
+readComparison (const SGPropertyNode * node,
+ FGComparisonCondition::Type type,
+ bool reverse)
+{
+ FGComparisonCondition * condition = new FGComparisonCondition(type, reverse);
+ condition->setLeftProperty(node->getStringValue("property[0]"));
+ if (node->hasValue("property[1]"))
+ condition->setRightProperty(node->getStringValue("property[1]"));
+ else
+ condition->setRightValue(node->getChild("value", 0));
+
+ return condition;
+}
+
+static FGCondition *
+readCondition (const SGPropertyNode * node)
+{
+ const string &name = node->getName();
+ if (name == "property")
+ return readPropertyCondition(node);
+ else if (name == "not")
+ return readNotCondition(node);
+ else if (name == "and")
+ return readAndConditions(node);
+ else if (name == "or")
+ return readOrConditions(node);
+ else if (name == "less-than")
+ return readComparison(node, FGComparisonCondition::LESS_THAN, false);
+ else if (name == "less-than-equals")
+ return readComparison(node, FGComparisonCondition::GREATER_THAN, true);
+ else if (name == "greater-than")
+ return readComparison(node, FGComparisonCondition::GREATER_THAN, false);
+ else if (name == "greater-than-equals")
+ return readComparison(node, FGComparisonCondition::LESS_THAN, true);
+ else if (name == "equals")
+ return readComparison(node, FGComparisonCondition::EQUALS, false);
+ else if (name == "not-equals")
+ return readComparison(node, FGComparisonCondition::EQUALS, true);
+ else
+ return 0;
+}
+
+
+\f
+////////////////////////////////////////////////////////////////////////
+// Implementation of FGConditional.
+////////////////////////////////////////////////////////////////////////
+
+FGConditional::FGConditional ()
+ : _condition (0)
+{
+}
+
+FGConditional::~FGConditional ()
+{
+ delete _condition;
+}
+
+void
+FGConditional::setCondition (FGCondition * condition)
+{
+ delete _condition;
+ _condition = condition;
+}
+
+bool
+FGConditional::test () const
+{
+ return ((_condition == 0) || _condition->test());
+}
+
+
+\f
+// The top-level is always an implicit 'and' group
+FGCondition *
+fgReadCondition (const SGPropertyNode * node)
+{
+ return readAndConditions(node);
+}
+
+
+// end of fg_props.cxx