/**
* IdmlGroups do not have <PathGeometry> or <GeometricBounds> so their overall bounds must be determined
* after reading all children by getting the outer bounds of all encompassed children.
* The true bounds of the children must take into account their transformation: their true boundaries are
* determined by call IdmlBoundary::transform.
* Once the group's absolute boundary is computed from the children's boundaries, the group's own transformation
* must be accounted for by subtracting the tx and ty from the boundary points.
*/
public function determineBounds()
{
$boundary = null;
foreach ($this->childrenElements as $child) {
// If the child's boundary is not set, go to the next child.
if (!isset($child->boundary)) {
continue;
}
$childBoundary = IdmlBoundary::transform($child->boundary, $child->transformation);
// For the first child's boundary, duplicate it
if (is_null($boundary)) {
$boundary = new IdmlBoundary($childBoundary->top, $childBoundary->left, $childBoundary->bottom, $childBoundary->right);
continue;
}
// Add the child's dimensions to the group's boundary.
if (get_class($child) == 'IdmlTextFrame') {
// Add the height of the text frame, which stacks vertically.
$boundary->bottom += $childBoundary->getHeight();
} else {
// Use that new boundary to expand the bounds of the group.
$boundary->encompass($childBoundary);
}
}
// Now subtract the group's tx and ty from the boundary points to determine its actual position.
$top = $boundary->top - $this->transformation->yTranslate();
$left = $boundary->left - $this->transformation->xTranslate();
$bottom = $boundary->bottom - $this->transformation->yTranslate();
$right = $boundary->right - $this->transformation->xTranslate();
$this->boundary = new IdmlBoundary($top, $left, $bottom, $right);
}
/**
* Sets the transform data, both local and cumulative, for the element
* @param DOMElement $node
*/
public function setTransform(DOMElement $node)
{
$transformation = $node->hasAttribute(IdmlAttributes::ItemTransform) ? $node->getAttribute(IdmlAttributes::ItemTransform) : '';
$this->transformation = new IdmlTransformation($transformation);
// If the parent element contains a transformation, accumulate the tx and ty values
if (is_a($this->parentElement, 'IdmlElement') && isset($this->parentElement->transformation)) {
// get the parent's cumulative transform values
$cumTx = $this->transformation->xTranslate() + $this->parentElement->transformation->xTranslate();
$cumTy = $this->transformation->yTranslate() + $this->parentElement->transformation->yTranslate();
$this->transformation->setXY($cumTx, $cumTy);
}
}
/**
* Parse the portion of a spread.xml file that contains a <Page>
*
* @param DOMNode $domNode is a single <Page> node within the document
*/
public function parse($domNode)
{
$attributes = $domNode->attributes;
$this->UID = $attributes->getNamedItem('Self')->value;
// like 'ud3'
$this->appliedMasterUID = $attributes->getNamedItem('AppliedMaster')->value;
// like 'ud3' or 'n'
$this->inDesignPageName = $attributes->getNamedItem('Name')->value;
// ordinary pages are numbers, master spreads are letters
$itemTransform = $attributes->getNamedItem('ItemTransform')->value;
// like "1 0 0 1 0 -396"
$masterPageTransform = $attributes->getNamedItem('MasterPageTransform')->value;
// like "1 0 0 1 0 0"
$geometricBounds = $attributes->getNamedItem('GeometricBounds')->value;
// like "0 0 792 612"
$overrideList = $attributes->getNamedItem('OverrideList')->value;
// like "ufb u174"
$this->transformation = new IdmlTransformation($itemTransform);
$this->masterPageTransform = new IdmlTransformation($masterPageTransform);
$this->boundary = IdmlBoundary::createFromIDMLString($geometricBounds);
$this->idssCoordinates = IdmlBoundary::transform($this->boundary, $this->transformation);
if ($overrideList != '') {
$this->masterSpreadOverrides = explode(' ', $overrideList);
}
$pageX = $this->transformation->xTranslate();
if ($pageX < 0) {
$this->pagePosition = 'left';
} else {
$this->pagePosition = 'right';
}
// Increment progress step.
$p = IdmlAssembler::getProgressUpdater();
if ($p) {
$p->incrementStep();
}
}
/**
* The transform function applies the transformation matrix to this object and returns a new coordinates object.
*
* @param IdmlBoundary $boundary
* @param IdmlTransformation $matrix
*
* @return IdmlBoundary a new object
*/
public static function transform(IdmlBoundary $boundary, IdmlTransformation $matrix)
{
$a = $matrix->getA();
$b = $matrix->getB();
$c = $matrix->getC();
$d = $matrix->getD();
$tx = $matrix->xTranslate();
$ty = $matrix->yTranslate();
$left = $boundary->left;
$top = $boundary->top;
$right = $boundary->right;
$bottom = $boundary->bottom;
// Transform (x1,y1)
$left2 = $left * $a + $top * $c + $tx;
$top2 = $left * $b + $top * $d + $ty;
// Transform (x2,y2)
$right2 = $right * $a + $bottom * $c + $tx;
$bottom2 = $right * $b + $bottom * $d + $ty;
return new IdmlBoundary($top2, $left2, $bottom2, $right2);
}
