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<?php
/**
* @package dompdf
* @link http://www.dompdf.com/
* @author Benj Carson <benjcarson@digitaljunkies.ca>
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
* @version $Id: cellmap.cls.php 464 2012-01-30 20:44:53Z fabien.menager $
*/
/**
* Maps table cells to the table grid.
*
* This class resolves borders in tables with collapsed borders and helps
* place row & column spanned table cells.
*
* @access private
* @package dompdf
*/
class Cellmap {
/**
* Border style weight lookup for collapsed border resolution.
*
* @var array
*/
static protected $_BORDER_STYLE_SCORE = array("inset" => 1,
"groove" => 2,
"outset" => 3,
"ridge" => 4,
"dotted" => 5,
"dashed" => 6,
"solid" => 7,
"double" => 8,
"hidden" => 9,
"none" => 0);
/**
* The table object this cellmap is attached to.
*
* @var Table_Frame_Decorator
*/
protected $_table;
/**
* The total number of rows in the table
*
* @var int
*/
protected $_num_rows;
/**
* The total number of columns in the table
*
* @var int
*/
protected $_num_cols;
/**
* 2D array mapping <row,column> to frames
*
* @var array
*/
protected $_cells;
/**
* 1D array of column dimensions
*
* @var array
*/
protected $_columns;
/**
* 1D array of row dimensions
*
* @var array
*/
protected $_rows;
/**
* 2D array of border specs
*
* @var array
*/
protected $_borders;
/**
* 1D Array mapping frames to (multiple) <row, col> pairs, keyed on
* frame_id.
*
* @var array
*/
protected $_frames;
/**
* @var int Current column when adding cells, 0-based
*/
private $__col;
/**
* @var int Current row when adding cells, 0-based
*/
private $__row;
/**
* @var bool Tells wether the columns' width can be modified
*/
private $_columns_locked = false;
//........................................................................
function __construct(Table_Frame_Decorator $table) {
$this->_table = $table;
$this->reset();
}
function __destruct() {
clear_object($this);
}
//........................................................................
function reset() {
$this->_num_rows = 0;
$this->_num_cols = 0;
$this->_cells = array();
$this->_frames = array();
if ( !$this->_columns_locked ) {
$this->_columns = array();
}
$this->_rows = array();
$this->_borders = array();
$this->__col = $this->__row = 0;
}
//........................................................................
function lock_columns() {
$this->_columns_locked = true;
}
function is_columns_locked() {
return $this->_columns_locked;
}
function get_num_rows() { return $this->_num_rows; }
function get_num_cols() { return $this->_num_cols; }
function &get_columns() {
return $this->_columns;
}
function set_columns($columns) {
$this->_columns = $columns;
}
function &get_column($i) {
if ( !isset($this->_columns[$i]) )
$this->_columns[$i] = array("x" => 0,
"min-width" => 0,
"max-width" => 0,
"used-width" => null,
"absolute" => 0,
"percent" => 0,
"auto" => true);
return $this->_columns[$i];
}
function &get_rows() {
return $this->_rows;
}
function &get_row($j) {
if ( !isset($this->_rows[$j]) )
$this->_rows[$j] = array("y" => 0,
"first-column" => 0,
"height" => null);
return $this->_rows[$j];
}
function get_border($i, $j, $h_v, $prop = null) {
if ( !isset($this->_borders[$i][$j][$h_v]) )
$this->_borders[$i][$j][$h_v] = array("width" => 0,
"style" => "solid",
"color" => "black");
if ( isset($prop) )
return $this->_borders[$i][$j][$h_v][$prop];
return $this->_borders[$i][$j][$h_v];
}
function get_border_properties($i, $j) {
$left = $this->get_border($i, $j, "vertical");
$right = $this->get_border($i, $j+1, "vertical");
$top = $this->get_border($i, $j, "horizontal");
$bottom = $this->get_border($i+1, $j, "horizontal");
return compact("top", "bottom", "left", "right");
}
//........................................................................
function get_spanned_cells($frame) {
$key = $frame->get_id();
if ( !isset($this->_frames[$key]) ) {
throw new DOMPDF_Exception("Frame not found in cellmap");
}
return $this->_frames[$key];
}
function frame_exists_in_cellmap($frame) {
$key = $frame->get_id();
return isset($this->_frames[$key]);
}
function get_frame_position($frame) {
global $_dompdf_warnings;
$key = $frame->get_id();
if ( !isset($this->_frames[$key]) ) {
throw new DOMPDF_Exception("Frame not found in cellmap");
}
$col = $this->_frames[$key]["columns"][0];
$row = $this->_frames[$key]["rows"][0];
if ( !isset($this->_columns[$col])) {
$_dompdf_warnings[] = "Frame not found in columns array. Check your table layout for missing or extra TDs.";
$x = 0;
} else
$x = $this->_columns[$col]["x"];
if ( !isset($this->_rows[$row])) {
$_dompdf_warnings[] = "Frame not found in row array. Check your table layout for missing or extra TDs.";
$y = 0;
} else
$y = $this->_rows[$row]["y"];
return array($x, $y, "x" => $x, "y" => $y);
}
function get_frame_width($frame) {
$key = $frame->get_id();
if ( !isset($this->_frames[$key]) ) {
throw new DOMPDF_Exception("Frame not found in cellmap");
}
$cols = $this->_frames[$key]["columns"];
$w = 0;
foreach ($cols as $i)
$w += $this->_columns[$i]["used-width"];
return $w;
}
function get_frame_height($frame) {
$key = $frame->get_id();
if ( !isset($this->_frames[$key]) ) {
throw new DOMPDF_Exception("Frame not found in cellmap");
}
$rows = $this->_frames[$key]["rows"];
$h = 0;
foreach ($rows as $i) {
if ( !isset($this->_rows[$i]) ) {
throw new Exception("foo");
}
$h += $this->_rows[$i]["height"];
}
return $h;
}
//........................................................................
function set_column_width($j, $width) {
if ( $this->_columns_locked ) {
return;
}
$col =& $this->get_column($j);
$col["used-width"] = $width;
$next_col =& $this->get_column($j+1);
$next_col["x"] = $next_col["x"] + $width;
}
function set_row_height($i, $height) {
$row =& $this->get_row($i);
if ( $row["height"] !== null && $height <= $row["height"] ) {
return;
}
$row["height"] = $height;
$next_row =& $this->get_row($i+1);
$next_row["y"] = $row["y"] + $height;
}
//........................................................................
protected function _resolve_border($i, $j, $h_v, $border_spec) {
$n_width = $border_spec["width"];
$n_style = $border_spec["style"];
$n_color = $border_spec["color"];
if ( !isset($this->_borders[$i][$j][$h_v]) ) {
$this->_borders[$i][$j][$h_v] = $border_spec;
return $this->_borders[$i][$j][$h_v]["width"];
}
$border = &$this->_borders[$i][$j][$h_v];
$o_width = $border["width"];
$o_style = $border["style"];
$o_color = $border["color"];
if ( ($n_style === "hidden" ||
$n_width > $o_width ||
$o_style === "none")
or
($o_width == $n_width &&
in_array($n_style, self::$_BORDER_STYLE_SCORE) &&
self::$_BORDER_STYLE_SCORE[ $n_style ] > self::$_BORDER_STYLE_SCORE[ $o_style ]) )
$border = $border_spec;
return $border["width"];
}
//........................................................................
function add_frame(Frame $frame) {
$style = $frame->get_style();
$display = $style->display;
$collapse = $this->_table->get_style()->border_collapse == "collapse";
// Recursively add the frames within tables, table-row-groups and table-rows
if ( $display === "table-row" ||
$display === "table" ||
$display === "inline-table" ||
in_array($display, Table_Frame_Decorator::$ROW_GROUPS) ) {
$start_row = $this->__row;
foreach ( $frame->get_children() as $child )
$this->add_frame( $child );
if ( $display === "table-row" )
$this->add_row();
$num_rows = $this->__row - $start_row - 1;
$key = $frame->get_id();
// Row groups always span across the entire table
$this->_frames[$key]["columns"] = range(0,max(0,$this->_num_cols-1));
$this->_frames[$key]["rows"] = range($start_row, max(0, $this->__row - 1));
$this->_frames[$key]["frame"] = $frame;
if ( $display !== "table-row" && $collapse ) {
$bp = $style->get_border_properties();
// Resolve the borders
for ( $i = 0; $i < $num_rows+1; $i++) {
$this->_resolve_border($start_row + $i, 0, "vertical", $bp["left"]);
$this->_resolve_border($start_row + $i, $this->_num_cols, "vertical", $bp["right"]);
}
for ( $j = 0; $j < $this->_num_cols; $j++) {
$this->_resolve_border($start_row, $j, "horizontal", $bp["top"]);
$this->_resolve_border($this->__row, $j, "horizontal", $bp["bottom"]);
}
}
return;
}
$node = $frame->get_node();
// Determine where this cell is going
$colspan = $node->getAttribute("colspan");
$rowspan = $node->getAttribute("rowspan");
if ( !$colspan ) {
$colspan = 1;
$node->setAttribute("colspan",1);
}
if ( !$rowspan ) {
$rowspan = 1;
$node->setAttribute("rowspan",1);
}
$key = $frame->get_id();
$bp = $style->get_border_properties();
// Add the frame to the cellmap
$max_left = $max_right = 0;
// Find the next available column (fix by Ciro Mondueri)
$ac = $this->__col;
while ( isset($this->_cells[$this->__row][$ac]) )
$ac++;
$this->__col = $ac;
// Rows:
for ( $i = 0; $i < $rowspan; $i++ ) {
$row = $this->__row + $i;
$this->_frames[$key]["rows"][] = $row;
for ( $j = 0; $j < $colspan; $j++)
$this->_cells[$row][$this->__col + $j] = $frame;
if ( $collapse ) {
// Resolve vertical borders
$max_left = max($max_left, $this->_resolve_border($row, $this->__col, "vertical", $bp["left"]));
$max_right = max($max_right, $this->_resolve_border($row, $this->__col + $colspan, "vertical", $bp["right"]));
}
}
$max_top = $max_bottom = 0;
// Columns:
for ( $j = 0; $j < $colspan; $j++ ) {
$col = $this->__col + $j;
$this->_frames[$key]["columns"][] = $col;
if ( $collapse ) {
// Resolve horizontal borders
$max_top = max($max_top, $this->_resolve_border($this->__row, $col, "horizontal", $bp["top"]));
$max_bottom = max($max_bottom, $this->_resolve_border($this->__row + $rowspan, $col, "horizontal", $bp["bottom"]));
}
}
$this->_frames[$key]["frame"] = $frame;
// Handle seperated border model
if ( !$collapse ) {
list($h, $v) = $this->_table->get_style()->border_spacing;
// Border spacing is effectively a margin between cells
$v = $style->length_in_pt($v) / 2;
$h = $style->length_in_pt($h) / 2;
$style->margin = "$v $h";
// The additional 1/2 width gets added to the table proper
} else {
// Drop the frame's actual border
$style->border_left_width = $max_left / 2;
$style->border_right_width = $max_right / 2;
$style->border_top_width = $max_top / 2;
$style->border_bottom_width = $max_bottom / 2;
$style->margin = "none";
}
// Resolve the frame's width
list($frame_min, $frame_max) = $frame->get_min_max_width();
$width = $style->width;
if ( is_percent($width) ) {
$var = "percent";
$val = (float)rtrim($width, "% ") / $colspan;
} else if ( $width !== "auto" ) {
$var = "absolute";
$val = $style->length_in_pt($frame_min) / $colspan;
}
if (!$this->_columns_locked) {
$min = 0;
$max = 0;
for ( $cs = 0; $cs < $colspan; $cs++ ) {
// Resolve the frame's width(s) with other cells
$col =& $this->get_column( $this->__col + $cs );
// Note: $var is either 'percent' or 'absolute'. We compare the
// requested percentage or absolute values with the existing widths
// and adjust accordingly.
if ( isset($var) && $val > $col[$var] ) {
$col[$var] = $val;
$col["auto"] = false;
}
$min += $col["min-width"];
$max += $col["max-width"];
}
if ( $frame_min > $min ) {
// The frame needs more space. Expand each sub-column
$inc = ($frame_min - $min) / $colspan;
for ($c = 0; $c < $colspan; $c++) {
$col =& $this->get_column($this->__col + $c);
$col["min-width"] += $inc;
}
}
if ( $frame_max > $max ) {
$inc = ($frame_max - $max) / $colspan;
for ($c = 0; $c < $colspan; $c++) {
$col =& $this->get_column($this->__col + $c);
$col["max-width"] += $inc;
}
}
}
$this->__col += $colspan;
if ( $this->__col > $this->_num_cols )
$this->_num_cols = $this->__col;
}
//........................................................................
function add_row() {
$this->__row++;
$this->_num_rows++;
// Find the next available column
$i = 0;
while ( isset($this->_cells[$this->__row][$i]) )
$i++;
$this->__col = $i;
}
//........................................................................
/**
* Remove a row from the cellmap.
*
* @param Frame
*/
function remove_row(Frame $row) {
$key = $row->get_id();
if ( !isset($this->_frames[$key]) )
return; // Presumably this row has alredy been removed
$this->_row = $this->_num_rows--;
$rows = $this->_frames[$key]["rows"];
$columns = $this->_frames[$key]["columns"];
// Remove all frames from this row
foreach ( $rows as $r ) {
foreach ( $columns as $c ) {
if ( isset($this->_cells[$r][$c]) ) {
$id = $this->_cells[$r][$c]->get_id();
$this->_frames[$id] = null;
unset($this->_frames[$id]);
$this->_cells[$r][$c] = null;
unset($this->_cells[$r][$c]);
}
}
$this->_rows[$r] = null;
unset($this->_rows[$r]);
}
$this->_frames[$key] = null;
unset($this->_frames[$key]);
}
/**
* Remove a row group from the cellmap.
*
* @param Frame $group The group to remove
*/
function remove_row_group(Frame $group) {
$key = $group->get_id();
if ( !isset($this->_frames[$key]) )
return; // Presumably this row has alredy been removed
$iter = $group->get_first_child();
while ($iter) {
$this->remove_row($iter);
$iter = $iter->get_next_sibling();
}
$this->_frames[$key] = null;
unset($this->_frames[$key]);
}
/**
* Update a row group after rows have been removed
*
* @param Frame $group The group to update
* @param Frame $last_row The last row in the row group
*/
function update_row_group(Frame $group, Frame $last_row) {
$g_key = $group->get_id();
$r_key = $last_row->get_id();
$r_rows = $this->_frames[$r_key]["rows"];
$this->_frames[$g_key]["rows"] = range( $this->_frames[$g_key]["rows"][0], end($r_rows) );
}
//........................................................................
function assign_x_positions() {
// Pre-condition: widths must be resolved and assigned to columns and
// column[0]["x"] must be set.
if ( $this->_columns_locked ) {
return;
}
$x = $this->_columns[0]["x"];
foreach ( array_keys($this->_columns) as $j ) {
$this->_columns[$j]["x"] = $x;
$x += $this->_columns[$j]["used-width"];
}
}
function assign_frame_heights() {
// Pre-condition: widths and heights of each column & row must be
// calcluated
foreach ( $this->_frames as $arr ) {
$frame = $arr["frame"];
$h = 0;
foreach( $arr["rows"] as $row ) {
if ( !isset($this->_rows[$row]) )
// The row has been removed because of a page split, so skip it.
continue;
$h += $this->_rows[$row]["height"];
}
if ( $frame instanceof Table_Cell_Frame_Decorator )
$frame->set_cell_height($h);
else
$frame->get_style()->height = $h;
}
}
//........................................................................
/**
* Re-adjust frame height if the table height is larger than its content
*/
function set_frame_heights($table_height, $content_height) {
// Distribute the increased height proportionally amongst each row
foreach ( $this->_frames as $arr ) {
$frame = $arr["frame"];
$h = 0;
foreach ($arr["rows"] as $row ) {
if ( !isset($this->_rows[$row]) )
continue;
$h += $this->_rows[$row]["height"];
}
if ( $content_height > 0 )
$new_height = ($h / $content_height) * $table_height;
else
$new_height = 0;
if ( $frame instanceof Table_Cell_Frame_Decorator )
$frame->set_cell_height($new_height);
else
$frame->get_style()->height = $new_height;
}
}
//........................................................................
// Used for debugging:
function __toString() {
$str = "";
$str .= "Columns:<br/>";
$str .= pre_r($this->_columns, true);
$str .= "Rows:<br/>";
$str .= pre_r($this->_rows, true);
$str .= "Frames:<br/>";
$arr = array();
foreach ( $this->_frames as $key => $val )
$arr[$key] = array("columns" => $val["columns"], "rows" => $val["rows"]);
$str .= pre_r($arr, true);
if ( php_sapi_name() == "cli" )
$str = strip_tags(str_replace(array("<br/>","<b>","</b>"),
array("\n",chr(27)."[01;33m", chr(27)."[0m"),
$str));
return $str;
}
}