little bit more optimizations and bugfix

lib/Layout/BlockBox.php

@@ -29,6 +29,12 @@ class BlockBox extends ElementBox implements BoxInterface, AppendChildInterface,
 	 * @var \YetiForcePDF\Layout\LineBox
 	 */
 	protected $currentLineBox;
+	/**
+	 * Parent width cache.
+	 *
+	 * @var string
+	 */
+	protected $parentWidth = '0';
 
 	/**
 	 * @var LineBox[]
@@ -364,13 +370,20 @@ public function measureWidth()
 		$dimensions = $this->getDimensions();
 		$parent = $this->getParent();
 		if ($parent) {
+			if ($this->parentWidth === $parent->getDimensions()->getWidth()) {
+				return $this;
+			}
+			$this->parentWidth = $parent->getDimensions()->getWidth();
+			$oldWidth = $this->getDimensions()->getWidth();
 			if ($parent->getDimensions()->getWidth() !== null) {
 				$dimensions->setWidth(Math::sub($parent->getDimensions()->getInnerWidth(), $this->getStyle()->getHorizontalMarginsWidth()));
 				$this->applyStyleWidth();
-				foreach ($this->getChildren() as $child) {
-					$child->measureWidth();
+				if ($oldWidth !== $this->getDimensions()->getWidth()) {
+					foreach ($this->getChildren() as $child) {
+						$child->measureWidth();
+					}
+					$this->divideLines();
 				}
-				$this->divideLines();
 				return $this;
 			}
 			// if parent doesn't have a width specified
@@ -389,12 +402,15 @@ public function measureWidth()
 			$this->applyStyleWidth();
 			return $this;
 		}
-		$dimensions->setWidth($this->document->getCurrentPage()->getDimensions()->getWidth());
-		$this->applyStyleWidth();
-		foreach ($this->getChildren() as $child) {
-			$child->measureWidth();
+		$width = $this->document->getCurrentPage()->getDimensions()->getWidth();
+		if ($this->getDimensions()->getWidth()!==$width) {
+			$dimensions->setWidth($width);
+			$this->applyStyleWidth();
+			foreach ($this->getChildren() as $child) {
+				$child->measureWidth();
+			}
+			$this->divideLines();
 		}
-		$this->divideLines();
 		return $this;
 	}
 

lib/Layout/Box.php

@@ -319,7 +319,7 @@ public function setDisplayable(bool $displayable)
 	 * Set style.
 	 *
 	 * @param \YetiForcePDF\Style\Style $style
-	 * @param bool $init
+	 * @param bool                      $init
 	 *
 	 * @return $this
 	 */
@@ -523,9 +523,6 @@ public function isRenderable()
 	 */
 	public function appendChild(self $box)
 	{
-		if ($this instanceof LineBox && $box instanceof LineBox) {
-			throw new \InvalidArgumentException('LineBox cannot append another LineBox as child.');
-		}
 		$box->setParent($this);
 		$childrenCount = count($this->children);
 		if ($childrenCount > 0) {
@@ -623,16 +620,18 @@ public function insertBefore(self $child, self $before)
 
 	/**
 	 * Get children.
+	 *
 	 * @param bool $onlyRenderable
 	 * @param bool $onlyForMeasurment
+	 *
 	 * @return Box[]
 	 */
 	public function getChildren(bool $onlyRenderable = false, bool $onlyForMeasurment = false): array
 	{
 		if (!$onlyRenderable && !$onlyForMeasurment) {
 			return $this->children;
 		}
-		return array_filter($this->children, function (Box $box) use ($onlyRenderable, $onlyForMeasurment) {
+		return array_filter($this->children, function (self $box) use ($onlyRenderable, $onlyForMeasurment) {
 			if ($onlyRenderable && $onlyForMeasurment) {
 				return $box->isRenderable() && $box->isForMeasurement();
 			}
@@ -647,7 +646,7 @@ public function getChildren(bool $onlyRenderable = false, bool $onlyForMeasurmen
 	 * Get all children.
 	 *
 	 * @param Box[] $allChildren
-	 * @param bool $withCurrent
+	 * @param bool  $withCurrent
 	 *
 	 * @return Box[]
 	 */
@@ -666,8 +665,8 @@ public function getAllChildren(&$allChildren = [], bool $withCurrent = true)
 	 * Iterate all children.
 	 *
 	 * @param callable $fn
-	 * @param bool $reverse
-	 * @param bool $deep
+	 * @param bool     $reverse
+	 * @param bool     $deep
 	 *
 	 * @return $this
 	 */
@@ -693,7 +692,7 @@ public function iterateChildren(callable $fn, bool $reverse = false, bool $deep
 	/**
 	 * Get boxes by type.
 	 *
-	 * @param string $shortClassName
+	 * @param string      $shortClassName
 	 * @param string|null $until
 	 *
 	 * @return array
@@ -1027,7 +1026,7 @@ public function alignText()
 	/**
 	 * Add border instructions.
 	 *
-	 * @param array $element
+	 * @param array  $element
 	 * @param string $pdfX
 	 * @param string $pdfY
 	 * @param string $width

lib/Layout/InlineBox.php

@@ -26,6 +26,18 @@ class InlineBox extends ElementBox implements BoxInterface, BuildTreeInterface,
 	 * @var \YetiForcePDF\Layout\TextBox
 	 */
 	protected $previousTextBox;
+	/**
+	 * Parent width cache.
+	 *
+	 * @var string
+	 */
+	protected $parentWidth ='0';
+	/**
+	 * Parent height cache.
+	 *
+	 * @var string
+	 */
+	protected $parentHeight ='0';
 
 	/**
 	 * Go up to Line box and clone and wrap element.
@@ -242,14 +254,21 @@ public function appendText($childDomElement, $element = null, $style = null, $pa
 	 */
 	public function measureWidth()
 	{
+		$style = $this->getStyle();
+		if ($this->parentWidth === $this->getParent()->getDimensions()->getWidth()) {
+			if (!$this->isForMeasurement()) {
+				$this->getDimensions()->setWidth(Math::add($style->getHorizontalBordersWidth(), $style->getHorizontalPaddingsWidth()));
+			}
+			return $this;
+		}
+		$this->parentWidth = $this->getParent()->getDimensions()->getWidth();
 		$width = '0';
 		if ($this->isForMeasurement()) {
 			foreach ($this->getChildren() as $child) {
 				$child->measureWidth();
 				$width = Math::add($width, $child->getDimensions()->getOuterWidth());
 			}
 		}
-		$style = $this->getStyle();
 		$width = Math::add($width, $style->getHorizontalBordersWidth(), $style->getHorizontalPaddingsWidth());
 		$this->getDimensions()->setWidth($width);
 		$this->applyStyleWidth();
@@ -263,6 +282,9 @@ public function measureWidth()
 	 */
 	public function measureHeight()
 	{
+		if ($this->getDimensions()->getHeight()!==null) {
+			return $this;
+		}
 		foreach ($this->getChildren() as $child) {
 			$child->measureHeight();
 		}

lib/Layout/LineBox.php

@@ -171,6 +171,9 @@ public function willFit(Box $box)
 		$childrenWidth = $this->getChildrenWidth();
 		$availableSpace = $this->getDimensions()->computeAvailableSpace();
 		$boxWidth = $box->getDimensions()->getWidth();
+		if (!$boxWidth) {
+			$boxWidth = $box->getDimensions()->getOuterWidth();
+		}
 		return Math::comp(Math::sub($availableSpace, $childrenWidth), $boxWidth) >= 0;
 	}
 

lib/Layout/TableBox.php

@@ -82,6 +82,12 @@ class TableBox extends BlockBox
 	 * @var TableRowGroupBox|null
 	 */
 	protected $anonymousRowGroup;
+	/**
+	 * Parent width cache.
+	 *
+	 * @var string
+	 */
+	protected $parentWidth = '0';
 
 	/**
 	 * We shouldn't append block box here.
@@ -1116,6 +1122,10 @@ public function getMinWidth()
 	 */
 	public function measureWidth()
 	{
+		if ($this->parentWidth === $this->getParent()->getParent()->getDimensions()->getWidth()) {
+			return $this;
+		}
+		$this->parentWidth = $this->getParent()->getParent()->getDimensions()->getWidth();
 		foreach ($this->getCells() as $cell) {
 			$cell->measureWidth();
 		}

lib/Layout/TableCellBox.php

@@ -25,6 +25,13 @@ class TableCellBox extends BlockBox
 	 */
 	protected $spanned = false;
 
+	/**
+	 * Parent width cache.
+	 *
+	 * @var string
+	 */
+	protected $parentWidth = '0';
+
 	/**
 	 * Set column spanned.
 	 *
@@ -55,6 +62,10 @@ public function isSpanned()
 	 */
 	public function measureWidth()
 	{
+		if ($this->parentWidth === $this->getClosestByType('TableBox')->getDimensions()->getWidth()) {
+			return $this;
+		}
+		$this->parentWidth = $this->getClosestByType('TableBox')->getDimensions()->getWidth();
 		foreach ($this->getChildren() as $child) {
 			$child->measureWidth();
 		}