function Legend($x = false, $y = false, MASK $mask = NULL, INTERVAL $ivl = NULL)
{
global $GRAPH_DELTA_SIZE;
global $GRAPH_FAST_LEGEND;
$spec = $this->CreateLegendSpec($x, $y);
list($xmin, $xmax) = $this->GetLegendSpecXInterval($spec);
$x = $spec['x'];
$y = $spec['y'];
$group = $this->reader->CreateGroup();
$caches = $this->reader->CreateCacheSet($group, $mask);
$ivl = $this->PrepareInterval($this->reader, $group, $caches, $ivl, array($xmim, $xmax));
$cfg = $this->GetAgregatingProperties($caches, $ivl);
$iv = $this->GetLegendInterval($spec, $cfg);
if (!$GRAPH_FAST_LEGEND || $cfg['type'] == CACHE::TYPE_MEAN) {
return $this->LegendSlow($spec, $iv, $mask, $ivl);
}
$cache_flags = CACHE::TRUNCATE_INTERVALS;
$itemlist_flags = REQUEST::NEED_AXISINFO;
$axes = $this->reader->CreateAxes();
$a = array_merge($cfg, array('limit' => 1, 'amount' => 0));
$result = array();
$notfound = true;
$caches->EnumerateAxes($axes, CACHESet::CACHE_ITEMS | $itemlist_flags);
$itempositions = array_fill(0, $axes->GetAxesNumber(), 0);
// counters by axis
$itempos = array();
// itemid in group => itemid in axis
foreach ($caches as $key => $cachewrap) {
$cache = $cachewrap->GetCache();
$size = $cachewrap->GetWidth();
$list = $cachewrap->GetItemList($itemlist_flags);
$a['resolution'] = $cache->resolution->Get($ivl, $cfg['amount']);
$points = $cachewrap->GetIntervals($iv, $a, $cache_flags);
$operation_info = $points->GetOperationInfo();
$group_result = array();
foreach ($points as $t => $v) {
for ($i = 0; $i < $size; $i++) {
$axis = $axes->GetAxis($list[$i]['axis']);
$axispos = $axis->GetPosition();
$itempos[$i] = $itempositions[$axispos]++;
list($min, $max) = $this->GetLegendSpecYInterval($spec, $axispos);
if (($v["max" . $i] < $min || $v["min" . $i] > $max) == false) {
array_push($group_result, array("id" => $i, "name" => $list[$i]['name'], "mode" => "interval", "interval" => array("from" => $iv->GetWindowStart(), "to" => $iv->GetWindowEnd(), "resolution" => $operation_info['resolution']), "value" => array("min" => $this->ValueFormat($v["min{$i}"]), "max" => $this->ValueFormat($v["max{$i}"]), "mean" => $this->ValueFormat($v["mean{$i}"])), "color" => $axis->GetChannelColor($itempos[$i])));
}
}
$notfound = false;
break;
}
unset($points);
/* Trully saying this is suboptimal on the rapidly changing data, where
MINMAX jumping up and down. GetNeighbors will get just latest point,
but MINMAX could use as an end point, just previous one */
if ($notfound) {
// Indexing items
for ($i = 0; $i < $size; $i++) {
$axis = $axes->GetAxis($list[$i]['axis']);
$axispos = $axis->GetPosition();
$itempos[$i] = $itempositions[$axispos]++;
}
$neighbors = $cachewrap->GetNeighbors($x);
if (sizeof($neighbors['left']) > 0 && sizeof($neighbors['right']) > 0) {
$keys1 = array_keys($neighbors['left']);
$x1 = $keys1[0];
$keys2 = array_keys($neighbors['right']);
$x2 = $keys2[0];
$check1 = true;
if (!$this->interpolate_gaps) {
/* We don't check expected gap, since otherwise this points
would be found before neighbors lookup */
/*
echo "$x $x1\n";
echo ($x - $x1) . "\n";
echo $this->allowed_gap . "\n";
*/
$distance = max(dsMathPreciseSubstract($x, $x1), dsMathPreciseSubstract($x2, $x));
if ($this->allowed_gap && $distance > $this->allowed_gap) {
$check1 = false;
}
if ($operation_info['resolution'] && $distance > 2 * $operation_info['resolution']) {
$check1 = false;
}
}
if ($check1 && dsMathPreciseCompare($x1, $xmin) >= 0 && dsMathPreciseCompare($x2, $xmax) <= 0) {
$coef = dsMathPreciseSubstract($x, $x1) / dsMathPreciseSubstract($x2, $x1);
for ($i = 0; $i < $size; $i++) {
$axis = $axes->GetAxis($list[$i]['axis']);
$axispos = $axis->GetPosition();
list($min, $max) = $this->GetLegendSpecYInterval($spec, $axispos);
$y1 = $neighbors['left'][$x1][$i];
$y2 = $neighbors['right'][$x2][$i];
$y = $y1 + $coef * ($y2 - $y1);
//DS.Precision
if ($y > $min && $y < $max) {
array_push($group_result, array("id" => $i, "name" => $list[$i]['name'], "mode" => "approximation", "approximation" => array("x1" => $x1, "y1" => $this->ValueFormat($y1), "x2" => $x2, "y2" => $this->ValueFormat($y2)), "color" => $axis->GetChannelColor($itempos[$i])));
}
}
}
}
}
if ($group_result) {
array_push($result, array("title" => $cachewrap->GetGroupTitle(), "results" => $group_result));
}
}
// print_r($legend);
return $result;
}
function GetPoint(&$key1, &$ivl1, &$key2, &$ivl2)
{
$this->row = array();
switch ($this->type) {
case CACHE::TYPE_MEAN:
if ($this->empty_key) {
$nextkey = dsMathPreciseAdd($this->empty_key, $this->expected_gap);
if ($nextkey > $key1) {
$this->empty_key = false;
} else {
$this->key = $this->empty_key;
$this->row[0] = false;
$this->empty_key = $nextkey;
return false;
}
}
$this->missing = 0;
if ($ivl1) {
if ($ivl2 && ($this->flags & CACHE::REPORT_EMPTY || $this->flags & CACHE::MISSING_INFO)) {
$key1end = dsMathPreciseAdd($key1, $ivl1['width']);
$distance = dsMathPreciseSubstract($key2, $key1end);
if ($this->allowed_gap && $distance > $this->allowed_gap) {
$this->missing = $distance;
if ($this->expected_gap && $distance > 2 * $this->expected_gap) {
$this->gaps = true;
if ($this->flags & CACHE::REPORT_EMPTY) {
$this->empty_key = dsMathPreciseAdd($key1end, $this->expected_gap);
}
}
}
}
$ivl =& $ivl1;
$this->key = dsMathPreciseAdd($key1, $ivl['width'] / 2);
} else {
$ivl =& $ivl2;
$this->key = dsMathPreciseAdd($key2, $ivl['width'] / 2);
}
if ($this->allowed_gap && !$this->missing && $ivl['maxgap'] > $this->allowed_gap) {
$this->missing = $ivl['maxgap'];
}
for ($i = 0; $i < $this->ids; $i++) {
$this->row[$i] = $ivl['mean' . $i];
}
break;
case CACHE::TYPE_MINMAX:
if ($this->started) {
$key1end = dsMathPreciseAdd($key1, $ivl1['width']);
if ($ivl2) {
$distance = dsMathPreciseSubstract($key2, $key1end);
if ($this->expected_gap && $distance > 2 * $this->expected_gap) {
$this->MINMAXLast($key1end, $ivl1);
if ($this->allowed_gap && $distance > $this->allowed_gap) {
$this->missing = $distance;
$this->gaps = true;
if ($this->flags & CACHE::REPORT_EMPTY) {
$this->empty_key = dsMathPreciseAdd($key1end, $this->expected_gap);
}
}
return false;
}
if ($distance > 0) {
$this->MINMAXStep($key1end, $ivl1, $key2, $ivl2);
} else {
$this->MINMAXStep($key1end = false, $ivl1, $key2, $ivl2);
}
} else {
if ($ivl1) {
$this->MINMAXLast($key1end, $ivl1);
}
}
} else {
if ($ivl2) {
if ($this->empty_key) {
$nextkey = dsMathPreciseAdd($this->empty_key, $this->expected_gap);
if ($nextkey > $key2) {
$this->empty_key = false;
} else {
$this->key = $this->empty_key;
$this->row[0] = false;
$this->empty_key = $nextkey;
return false;
}
} else {
if ($ivl1 && $this->allowed_gap) {
$key1end = dsMathPreciseAdd($key1, $ivl1['width']);
$distance = dsMathPreciseSubstract($key2, $key1end);
if ($distance > $this->allowed_gap) {
$this->gaps = true;
if ($this->flags & CACHE::REPORT_EMPTY) {
$this->empty_key = dsMathPreciseAdd($key1end, $this->expected_gap);
return false;
}
}
}
}
if (!$ivl2['width']) {
$this->key = $key2;
for ($i = 0; $i < $this->ids; $i++) {
$this->row[$i] = $ivl2['mean' . $i];
}
$this->missing = 0;
if ($this->flags & CACHE::MISSING_INFO && $this->allowed_gap) {
if ($this->interval && $this->interval->valid()) {
$this->row3 = $this->interval->current();
$this->key3 = $this->interval->key();
$this->interval->next();
$distance = dsMathPreciseSubstract($key3, $key2);
if ($distance > $this->allowed_gap) {
$this->missing = $distance;
}
}
}
} else {
$this->MINMAXFirst($key2, $ivl2);
}
} else {
/* if not started and no ivl2 - we are done */
unset($this->irow);
}
}
break;
default:
throw new ADEIException(translate("Invalid interval aggregation mode (%u) is specified", $this->type));
}
return true;
// print_r($ivl1);
}
function GetRequestWindowSize()
{
if ($this->request_window_size > 0) {
return $this->request_window_size;
} else {
if ($this->request_window_start !== false) {
if (!$this->end_by_data) {
return dsMathPreciseSubstract($this->GetRequestEndTime(), $this->request_window_start);
}
}
}
return $this->GetWindowSize();
}
function ParseTitleDate($spec)
{
global $GRAPH_SUBSECOND_THRESHOLD;
$spec['length'] = dsMathPreciseSubstract($spec['to'], $spec['from']);
$from = $spec['from'];
$to = $spec['to'];
$length = $spec['length'];
$afrom = getdate($from);
$ato = getdate($to);
if ($length > 315360000) {
// 10 years
$date_format = 'Y';
$label_interval = 1;
$date_title = $afrom['year'] . " - " . $ato['year'];
} elseif ($length > 31104000) {
// 1 year
if ($afrom['year'] == $ato['year']) {
$date_format = 'M';
$label_interval = 2;
$date_title = $afrom['year'];
} else {
$date_format = 'M, Y';
$label_interval = 2;
$date_title = $afrom['year'] . " - " . $ato['year'];
}
} elseif ($length > 1036800) {
// 12 days
$date_format = 'M d';
$label_interval = 3;
if ($afrom['year'] == $ato['year']) {
if ($afrom['mon'] == $ato['mon']) {
$date_title = $afrom['month'] . ", " . $afrom['year'];
} else {
$date_title = $afrom['year'];
}
} else {
$date_title = $afrom['year'] . " - " . $ato['year'];
}
} elseif ($length > 86400) {
// 1 day
$date_format = 'M d, H:i';
$label_interval = 4;
if ($afrom['year'] == $ato['year']) {
if ($afrom['mon'] == $ato['mon']) {
$date_title = $afrom['month'] . ", " . $afrom['year'];
} else {
$date_title = $afrom['year'];
}
} else {
$date_title = $afrom['year'] . " - " . $ato['year'];
}
} elseif ($length > 14400) {
// 4 hours
$date_format = 'H:i';
$label_interval = 2;
if ($afrom['year'] == $ato['year']) {
if ($afrom['mon'] == $ato['mon']) {
if ($afrom['mday'] == $ato['mday']) {
$date_title = $afrom['month'] . " " . $afrom['mday'] . ", " . $afrom['year'];
} else {
$date_title = $afrom['month'] . " " . $afrom['mday'] . " - " . $ato['mday'] . ", " . $afrom['year'];
}
} else {
$date_title = date("M", $from) . " " . $afrom['mday'] . " - " . date("M", $to) . " " . $ato['mday'] . ", " . $afrom['year'];
}
} else {
$date_title = date("M j, Y", $from) . " - " . date("M j, Y", $to);
}
} else {
if ($length > $GRAPH_SUBSECOND_THRESHOLD) {
$date_format = 'H:i:s';
$label_interval = 4;
if ($afrom['year'] == $ato['year']) {
if ($afrom['mon'] == $ato['mon']) {
if ($afrom['mday'] == $ato['mday']) {
$date_title = $afrom['month'] . " " . $afrom['mday'] . ", " . $afrom['year'];
} else {
$date_title = $afrom['month'] . " " . $afrom['mday'] . " - " . $ato['mday'] . ", " . $afrom['year'];
}
} else {
$date_title = date("M", $from) . " " . $afrom['mday'] . " - " . date("M", $to) . " " . $ato['mday'] . ", " . $afrom['year'];
}
} else {
$date_title = date("M j, Y", $from) . " - " . date("M j, Y", $to);
}
} else {
$ifrom = floor($from);
if (is_float($from)) {
$rfrom = substr(printf("%.9F", $from - $ifrom), 2);
} else {
$pos = strpos($from, ".");
if ($pos === false) {
$rfrom = 0;
} else {
$rfrom = substr($from, $pos + 1);
}
}
$date_title = date("M j, Y H:i:s", $ifrom);
if ($rfrom) {
$date_title .= "." . $rfrom;
$rfrom = "0.{$rfrom}";
}
}
}
if ($date_title == "") {
$date_title = "All data";
}
return $date_title;
}
function dsMathPreciseSubstract($a, $b)
{
if ($a < $b) {
return -dsMathPreciseSubstract($b, $a);
}
$pos = strpos($a, ".");
if ($pos === false) {
$ra = 0;
$ia = (int) $a;
} else {
$ia = (int) floor($a);
if (is_float($a)) {
$ra = $a - $ia;
} else {
if ($ia < 0) {
$ra = 1 - ("0." . substr($a, $pos + 1));
} else {
$ra = "0." . substr($a, $pos + 1);
}
}
}
$pos = strpos($b, ".");
if ($pos === false) {
$rb = 0;
$ib = (int) $b;
} else {
$ib = (int) floor($b);
if (is_float($b)) {
$rb = $b - $ib;
} else {
if ($ib < 0) {
$rb = 1 - ("0." . substr($b, $pos + 1));
} else {
$rb = "0." . substr($b, $pos + 1);
}
}
}
if ($ra || $rb) {
$r = $ra - $rb;
# if ($a < 0) echo "$a,$b $ia,$ib, $ra,$rb = $r\n";
if ($r < 0) {
if ($ia > $ib) {
return $ia - $ib - 1 . strstr(sprintf("%.24F", $r + 1), ".");
} else {
return 0;
}
} else {
if ($r > 0) {
if ($ia < $ib) {
return 0;
} else {
return $ia - $ib . strstr(sprintf("%.24F", $r), ".");
}
} else {
if ($ia > $ib) {
return $ia - $ib;
} else {
return 0;
}
}
}
} else {
return $ia - $ib;
}
}