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<?php namespace Dompdf; use Dompdf\Css\Style; use Dompdf\Frame\FrameList; /** * @package dompdf * @link http://dompdf.github.com/ * @author Benj Carson <benjcarson@digitaljunkies.ca> * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License / /* * The main Frame class * * This class represents a single HTML element. This class stores * positioning information as well as containing block location and * dimensions. Style information for the element is stored in a {@link * Style} object. Tree structure is maintained via the parent & children * links. * * @package dompdf / class Frame { const WS_TEXT = 1; const WS_SPACE = 2; /* * The DOMElement or DOMText object this frame represents * * @var \DOMElement\|\DOMText / protected $_node; /* * Unique identifier for this frame. Used to reference this frame * via the node. * * @var string / protected $_id; /* * Unique id counter / public static $ID_COUNTER = 0; /protected/ /* * This frame's calculated style * * @var Style / protected $_style; /* * This frame's original style. Needed for cases where frames are * split across pages. * * @var Style / protected $_original_style; /* * This frame's parent in the document tree. * * @var Frame / protected $_parent; /* * This frame's children * * @var Frame[] / protected $_frame_list; /* * This frame's first child. All children are handled as a * doubly-linked list. * * @var Frame / protected $_first_child; /* * This frame's last child. * * @var Frame / protected $_last_child; /* * This frame's previous sibling in the document tree. * * @var Frame / protected $_prev_sibling; /* * This frame's next sibling in the document tree. * * @var Frame / protected $_next_sibling; /* * This frame's containing block (used in layout): array(x, y, w, h) * * @var float[] / protected $_containing_block; /* * Position on the page of the top-left corner of the margin box of * this frame: array(x,y) * * @var float[] / protected $_position; /* * Absolute opacity of this frame * * @var float / protected $_opacity; /* * This frame's decorator * * @var \Dompdf\FrameDecorator\AbstractFrameDecorator / protected $_decorator; /* * This frame's containing line box * * @var LineBox / protected $_containing_line; /* * @var array / protected $_is_cache = array(); /* * Tells wether the frame was already pushed to the next page * * @var bool / public $_already_pushed = false; /* * @var bool / public $_float_next_line = false; /* * Tells wether the frame was split * * @var bool / public $_splitted; /* * @var int / public static $_ws_state = self::WS_SPACE; /* * Class constructor * * @param \DOMNode $node the DOMNode this frame represents / public function __construct(\DOMNode $node) { $this->_node = $node; $this->_parent = null; $this->_first_child = null; $this->_last_child = null; $this->_prev_sibling = $this->_next_sibling = null; $this->_style = null; $this->_original_style = null; $this->_containing_block = array( "x" => null, "y" => null, "w" => null, "h" => null, ); $this->_containing_block[0] =& $this->_containing_block["x"]; $this->_containing_block[1] =& $this->_containing_block["y"]; $this->_containing_block[2] =& $this->_containing_block["w"]; $this->_containing_block[3] =& $this->_containing_block["h"]; $this->_position = array( "x" => null, "y" => null, ); $this->_position[0] =& $this->_position["x"]; $this->_position[1] =& $this->_position["y"]; $this->_opacity = 1.0; $this->_decorator = null; $this->set_id(self::$ID_COUNTER++); } /* * WIP : preprocessing to remove all the unused whitespace / protected function ws_trim() { if ($this->ws_keep()) { return; } if (self::$_ws_state === self::WS_SPACE) { $node = $this->_node; if ($node->nodeName === "#text" && !empty($node->nodeValue)) { $node->nodeValue = preg_replace("/[ \t\r\n\f]+/u", " ", trim($node->nodeValue)); self::$_ws_state = self::WS_TEXT; } } } /* * @return bool / protected function ws_keep() { $whitespace = $this->get_style()->white_space; return in_array($whitespace, array("pre", "pre-wrap", "pre-line")); } /* * @return bool / protected function ws_is_text() { $node = $this->get_node(); if ($node->nodeName === "img") { return true; } if (!$this->is_in_flow()) { return false; } if ($this->is_text_node()) { return trim($node->nodeValue) !== ""; } return true; } /* * "Destructor": forcibly free all references held by this frame * * @param bool $recursive if true, call dispose on all children / public function dispose($recursive = false) { if ($recursive) { while ($child = $this->_first_child) { $child->dispose(true); } } // Remove this frame from the tree if ($this->_prev_sibling) { $this->_prev_sibling->_next_sibling = $this->_next_sibling; } if ($this->_next_sibling) { $this->_next_sibling->_prev_sibling = $this->_prev_sibling; } if ($this->_parent && $this->_parent->_first_child === $this) { $this->_parent->_first_child = $this->_next_sibling; } if ($this->_parent && $this->_parent->_last_child === $this) { $this->_parent->_last_child = $this->_prev_sibling; } if ($this->_parent) { $this->_parent->get_node()->removeChild($this->_node); } $this->_style->dispose(); $this->_style = null; unset($this->_style); $this->_original_style->dispose(); $this->_original_style = null; unset($this->_original_style); } /* * Re-initialize the frame / public function reset() { $this->_position["x"] = null; $this->_position["y"] = null; $this->_containing_block["x"] = null; $this->_containing_block["y"] = null; $this->_containing_block["w"] = null; $this->_containing_block["h"] = null; $this->_style = null; unset($this->_style); $this->_style = clone $this->_original_style; // If this represents a generated node then child nodes represent generated content. // Remove the children since the content will be generated next time this frame is reflowed. if ($this->_node->nodeName === "dompdf_generated" && $this->_style->content != "normal") { foreach ($this->get_children() as $child) { $this->remove_child($child); } } } /* * @return \DOMElement\|\DOMText / public function get_node() { return $this->_node; } /* * @return string / public function get_id() { return $this->_id; } /* * @return Style / public function get_style() { return $this->_style; } /* * @return Style / public function get_original_style() { return $this->_original_style; } /* * @return Frame / public function get_parent() { return $this->_parent; } /* * @return \Dompdf\FrameDecorator\AbstractFrameDecorator / public function get_decorator() { return $this->_decorator; } /* * @return Frame / public function get_first_child() { return $this->_first_child; } /* * @return Frame / public function get_last_child() { return $this->_last_child; } /* * @return Frame / public function get_prev_sibling() { return $this->_prev_sibling; } /* * @return Frame / public function get_next_sibling() { return $this->_next_sibling; } /* * @return FrameList\|Frame[] / public function get_children() { if (isset($this->_frame_list)) { return $this->_frame_list; } $this->_frame_list = new FrameList($this); return $this->_frame_list; } // Layout property accessors /* * Containing block dimensions * * @param $i string The key of the wanted containing block's dimension (x, y, w, h) * * @return float[]\|float / public function get_containing_block($i = null) { if (isset($i)) { return $this->_containing_block[$i]; } return $this->_containing_block; } /* * Block position * * @param $i string The key of the wanted position value (x, y) * * @return array\|float / public function get_position($i = null) { if (isset($i)) { return $this->_position[$i]; } return $this->_position; } //........................................................................ /* * Return the height of the margin box of the frame, in pt. Meaningless * unless the height has been calculated properly. * * @return float / public function get_margin_height() { $style = $this->_style; return (float)$style->length_in_pt(array( $style->height, $style->margin_top, $style->margin_bottom, $style->border_top_width, $style->border_bottom_width, $style->padding_top, $style->padding_bottom ), $this->_containing_block["h"]); } /* * Return the width of the margin box of the frame, in pt. Meaningless * unless the width has been calculated properly. * * @return float / public function get_margin_width() { $style = $this->_style; return (float)$style->length_in_pt(array( $style->width, $style->margin_left, $style->margin_right, $style->border_left_width, $style->border_right_width, $style->padding_left, $style->padding_right ), $this->_containing_block["w"]); } /* * @return float / public function get_break_margins() { $style = $this->_style; return (float)$style->length_in_pt(array( //$style->height, $style->margin_top, $style->margin_bottom, $style->border_top_width, $style->border_bottom_width, $style->padding_top, $style->padding_bottom ), $this->_containing_block["h"]); } /* * Return the content box (x,y,w,h) of the frame * * @return array / public function get_content_box() { $style = $this->_style; $cb = $this->_containing_block; $x = $this->_position["x"] + (float)$style->length_in_pt(array($style->margin_left, $style->border_left_width, $style->padding_left), $cb["w"]); $y = $this->_position["y"] + (float)$style->length_in_pt(array($style->margin_top, $style->border_top_width, $style->padding_top), $cb["h"]); $w = $style->length_in_pt($style->width, $cb["w"]); $h = $style->length_in_pt($style->height, $cb["h"]); return array(0 => $x, "x" => $x, 1 => $y, "y" => $y, 2 => $w, "w" => $w, 3 => $h, "h" => $h); } /* * Return the padding box (x,y,w,h) of the frame * * @return array / public function get_padding_box() { $style = $this->_style; $cb = $this->_containing_block; $x = $this->_position["x"] + (float)$style->length_in_pt(array($style->margin_left, $style->border_left_width), $cb["w"]); $y = $this->_position["y"] + (float)$style->length_in_pt(array($style->margin_top, $style->border_top_width), $cb["h"]); $w = $style->length_in_pt(array($style->padding_left, $style->width, $style->padding_right), $cb["w"]); $h = $style->length_in_pt(array($style->padding_top, $style->height, $style->padding_bottom), $cb["h"]); return array(0 => $x, "x" => $x, 1 => $y, "y" => $y, 2 => $w, "w" => $w, 3 => $h, "h" => $h); } /* * Return the border box of the frame * * @return array / public function get_border_box() { $style = $this->_style; $cb = $this->_containing_block; $x = $this->_position["x"] + (float)$style->length_in_pt($style->margin_left, $cb["w"]); $y = $this->_position["y"] + (float)$style->length_in_pt($style->margin_top, $cb["h"]); $w = $style->length_in_pt(array($style->border_left_width, $style->padding_left, $style->width, $style->padding_right, $style->border_right_width), $cb["w"]); $h = $style->length_in_pt(array($style->border_top_width, $style->padding_top, $style->height, $style->padding_bottom, $style->border_bottom_width), $cb["h"]); return array(0 => $x, "x" => $x, 1 => $y, "y" => $y, 2 => $w, "w" => $w, 3 => $h, "h" => $h); } /* * @param null $opacity * * @return float / public function get_opacity($opacity = null) { if ($opacity !== null) { $this->set_opacity($opacity); } return $this->_opacity; } /* * @return LineBox / public function &get_containing_line() { return $this->_containing_line; } //........................................................................ // Set methods /* * @param $id / public function set_id($id) { $this->_id = $id; // We can only set attributes of DOMElement objects (nodeType == 1). // Since these are the only objects that we can assign CSS rules to, // this shortcoming is okay. if ($this->_node->nodeType == XML_ELEMENT_NODE) { $this->_node->setAttribute("frame_id", $id); } } /* * @param Style $style / public function set_style(Style $style) { if (is_null($this->_style)) { $this->_original_style = clone $style; } //$style->set_frame($this); $this->_style = $style; } /* * @param \Dompdf\FrameDecorator\AbstractFrameDecorator $decorator / public function set_decorator(FrameDecorator\AbstractFrameDecorator $decorator) { $this->_decorator = $decorator; } /* * @param null $x * @param null $y * @param null $w * @param null $h / public function set_containing_block($x = null, $y = null, $w = null, $h = null) { if (is_array($x)) { foreach ($x as $key => $val) { $$key = $val; } } if (is_numeric($x)) { $this->_containing_block["x"] = $x; } if (is_numeric($y)) { $this->_containing_block["y"] = $y; } if (is_numeric($w)) { $this->_containing_block["w"] = $w; } if (is_numeric($h)) { $this->_containing_block["h"] = $h; } } /* * @param null $x * @param null $y / public function set_position($x = null, $y = null) { if (is_array($x)) { list($x, $y) = array($x["x"], $x["y"]); } if (is_numeric($x)) { $this->_position["x"] = $x; } if (is_numeric($y)) { $this->_position["y"] = $y; } } /* * @param $opacity / public function set_opacity($opacity) { $parent = $this->get_parent(); $base_opacity = (($parent && $parent->_opacity !== null) ? $parent->_opacity : 1.0); $this->_opacity = $base_opacity $opacity; } /** * @param LineBox $line / public function set_containing_line(LineBox $line) { $this->_containing_line = $line; } /* * Indicates if the margin height is auto sized * * @return bool / public function is_auto_height() { $style = $this->_style; return in_array( "auto", array( $style->height, $style->margin_top, $style->margin_bottom, $style->border_top_width, $style->border_bottom_width, $style->padding_top, $style->padding_bottom, $this->_containing_block["h"] ), true ); } /* * Indicates if the margin width is auto sized * * @return bool / public function is_auto_width() { $style = $this->_style; return in_array( "auto", array( $style->width, $style->margin_left, $style->margin_right, $style->border_left_width, $style->border_right_width, $style->padding_left, $style->padding_right, $this->_containing_block["w"] ), true ); } /* * Tells if the frame is a text node * * @return bool / public function is_text_node() { if (isset($this->_is_cache["text_node"])) { return $this->_is_cache["text_node"]; } return $this->_is_cache["text_node"] = ($this->get_node()->nodeName === "#text"); } /* * @return bool / public function is_positionned() { if (isset($this->_is_cache["positionned"])) { return $this->_is_cache["positionned"]; } $position = $this->get_style()->position; return $this->_is_cache["positionned"] = in_array($position, Style::$POSITIONNED_TYPES); } /* * @return bool / public function is_absolute() { if (isset($this->_is_cache["absolute"])) { return $this->_is_cache["absolute"]; } $position = $this->get_style()->position; return $this->_is_cache["absolute"] = ($position === "absolute" \|\| $position === "fixed"); } /* * @return bool / public function is_block() { if (isset($this->_is_cache["block"])) { return $this->_is_cache["block"]; } return $this->_is_cache["block"] = in_array($this->get_style()->display, Style::$BLOCK_TYPES); } /* * @return bool / public function is_inline_block() { if (isset($this->_is_cache["inline_block"])) { return $this->_is_cache["inline_block"]; } return $this->_is_cache["inline_block"] = ($this->get_style()->display === 'inline-block'); } /* * @return bool / public function is_in_flow() { if (isset($this->_is_cache["in_flow"])) { return $this->_is_cache["in_flow"]; } return $this->_is_cache["in_flow"] = !($this->get_style()->float !== "none" \|\| $this->is_absolute()); } /* * @return bool / public function is_pre() { if (isset($this->_is_cache["pre"])) { return $this->_is_cache["pre"]; } $white_space = $this->get_style()->white_space; return $this->_is_cache["pre"] = in_array($white_space, array("pre", "pre-wrap")); } /* * @return bool / public function is_table() { if (isset($this->_is_cache["table"])) { return $this->_is_cache["table"]; } $display = $this->get_style()->display; return $this->_is_cache["table"] = in_array($display, Style::$TABLE_TYPES); } /* * Inserts a new child at the beginning of the Frame * * @param $child Frame The new Frame to insert * @param $update_node boolean Whether or not to update the DOM / public function prepend_child(Frame $child, $update_node = true) { if ($update_node) { $this->_node->insertBefore($child->_node, $this->_first_child ? $this->_first_child->_node : null); } // Remove the child from its parent if ($child->_parent) { $child->_parent->remove_child($child, false); } $child->_parent = $this; $child->_prev_sibling = null; // Handle the first child if (!$this->_first_child) { $this->_first_child = $child; $this->_last_child = $child; $child->_next_sibling = null; } else { $this->_first_child->_prev_sibling = $child; $child->_next_sibling = $this->_first_child; $this->_first_child = $child; } } /* * Inserts a new child at the end of the Frame * * @param $child Frame The new Frame to insert * @param $update_node boolean Whether or not to update the DOM / public function append_child(Frame $child, $update_node = true) { if ($update_node) { $this->_node->appendChild($child->_node); } // Remove the child from its parent if ($child->_parent) { $child->_parent->remove_child($child, false); } $child->_parent = $this; $decorator = $child->get_decorator(); // force an update to the cached parent if ($decorator !== null) { $decorator->get_parent(false); } $child->_next_sibling = null; // Handle the first child if (!$this->_last_child) { $this->_first_child = $child; $this->_last_child = $child; $child->_prev_sibling = null; } else { $this->_last_child->_next_sibling = $child; $child->_prev_sibling = $this->_last_child; $this->_last_child = $child; } } /* * Inserts a new child immediately before the specified frame * * @param $new_child Frame The new Frame to insert * @param $ref Frame The Frame after the new Frame * @param $update_node boolean Whether or not to update the DOM * * @throws Exception / public function insert_child_before(Frame $new_child, Frame $ref, $update_node = true) { if ($ref === $this->_first_child) { $this->prepend_child($new_child, $update_node); return; } if (is_null($ref)) { $this->append_child($new_child, $update_node); return; } if ($ref->_parent !== $this) { throw new Exception("Reference child is not a child of this node."); } // Update the node if ($update_node) { $this->_node->insertBefore($new_child->_node, $ref->_node); } // Remove the child from its parent if ($new_child->_parent) { $new_child->_parent->remove_child($new_child, false); } $new_child->_parent = $this; $new_child->_next_sibling = $ref; $new_child->_prev_sibling = $ref->_prev_sibling; if ($ref->_prev_sibling) { $ref->_prev_sibling->_next_sibling = $new_child; } $ref->_prev_sibling = $new_child; } /* * Inserts a new child immediately after the specified frame * * @param $new_child Frame The new Frame to insert * @param $ref Frame The Frame before the new Frame * @param $update_node boolean Whether or not to update the DOM * * @throws Exception / public function insert_child_after(Frame $new_child, Frame $ref, $update_node = true) { if ($ref === $this->_last_child) { $this->append_child($new_child, $update_node); return; } if (is_null($ref)) { $this->prepend_child($new_child, $update_node); return; } if ($ref->_parent !== $this) { throw new Exception("Reference child is not a child of this node."); } // Update the node if ($update_node) { if ($ref->_next_sibling) { $next_node = $ref->_next_sibling->_node; $this->_node->insertBefore($new_child->_node, $next_node); } else { $new_child->_node = $this->_node->appendChild($new_child->_node); } } // Remove the child from its parent if ($new_child->_parent) { $new_child->_parent->remove_child($new_child, false); } $new_child->_parent = $this; $new_child->_prev_sibling = $ref; $new_child->_next_sibling = $ref->_next_sibling; if ($ref->_next_sibling) { $ref->_next_sibling->_prev_sibling = $new_child; } $ref->_next_sibling = $new_child; } /* * Remove a child frame * * @param Frame $child * @param boolean $update_node Whether or not to remove the DOM node * * @throws Exception * @return Frame The removed child frame / public function remove_child(Frame $child, $update_node = true) { if ($child->_parent !== $this) { throw new Exception("Child not found in this frame"); } if ($update_node) { $this->_node->removeChild($child->_node); } if ($child === $this->_first_child) { $this->_first_child = $child->_next_sibling; } if ($child === $this->_last_child) { $this->_last_child = $child->_prev_sibling; } if ($child->_prev_sibling) { $child->_prev_sibling->_next_sibling = $child->_next_sibling; } if ($child->_next_sibling) { $child->_next_sibling->_prev_sibling = $child->_prev_sibling; } $child->_next_sibling = null; $child->_prev_sibling = null; $child->_parent = null; return $child; } //........................................................................ // Debugging function: /* * @return string */ public function __toString() { // Skip empty text frames // if ( $this->is_text_node() && // preg_replace("/\s/", "", $this->_node->data) === "" ) // return ""; $str = "<b>" . $this->_node->nodeName . ":</b><br/>"; //$str .= spl_object_hash($this->_node) . "<br/>"; $str .= "Id: " . $this->get_id() . "<br/>"; $str .= "Class: " . get_class($this) . "<br/>"; if ($this->is_text_node()) { $tmp = htmlspecialchars($this->_node->nodeValue); $str .= "<pre>'" . mb_substr($tmp, 0, 70) . (mb_strlen($tmp) > 70 ? "..." : "") . "'</pre>"; } elseif ($css_class = $this->_node->getAttribute("class")) { $str .= "CSS class: '$css_class'<br/>"; } if ($this->_parent) { $str .= "\nParent:" . $this->_parent->_node->nodeName . " (" . spl_object_hash($this->_parent->_node) . ") " . "<br/>"; } if ($this->_prev_sibling) { $str .= "Prev: " . $this->_prev_sibling->_node->nodeName . " (" . spl_object_hash($this->_prev_sibling->_node) . ") " . "<br/>"; } if ($this->_next_sibling) { $str .= "Next: " . $this->_next_sibling->_node->nodeName . " (" . spl_object_hash($this->_next_sibling->_node) . ") " . "<br/>"; } $d = $this->get_decorator(); while ($d && $d != $d->get_decorator()) { $str .= "Decorator: " . get_class($d) . "<br/>"; $d = $d->get_decorator(); } $str .= "Position: " . Helpers::pre_r($this->_position, true); $str .= "\nContaining block: " . Helpers::pre_r($this->_containing_block, true); $str .= "\nMargin width: " . Helpers::pre_r($this->get_margin_width(), true); $str .= "\nMargin height: " . Helpers::pre_r($this->get_margin_height(), true); $str .= "\nStyle: <pre>" . $this->_style->__toString() . "</pre>"; if ($this->_decorator instanceof FrameDecorator\Block) { $str .= "Lines:<pre>"; foreach ($this->_decorator->get_line_boxes() as $line) { foreach ($line->get_frames() as $frame) { if ($frame instanceof FrameDecorator\Text) { $str .= "\ntext: "; $str .= "'" . htmlspecialchars($frame->get_text()) . "'"; } else { $str .= "\nBlock: " . $frame->get_node()->nodeName . " (" . spl_object_hash($frame->get_node()) . ")"; } } $str .= "\ny => " . $line->y . "\n" . "w => " . $line->w . "\n" . "h => " . $line->h . "\n" . "left => " . $line->left . "\n" . "right => " . $line->right . "\n"; } $str .= "</pre>"; } $str .= "\n"; if (php_sapi_name() === "cli") { $str = strip_tags(str_replace(array("<br/>", "<b>", "</b>"), array("\n", "", ""), $str)); } return $str; } }

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