/var/www/hkosl.com/littleark/webadmin/libraies/dompdf/dompdf/src/FrameReflower/Table.php


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<?php
/**
 * @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
 */
namespace Dompdf\FrameReflower;

use 
Dompdf\FrameDecorator\Block as BlockFrameDecorator;
use 
Dompdf\FrameDecorator\Table as TableFrameDecorator;

/**
 * Reflows tables
 *
 * @access  private
 * @package dompdf
 */
class Table extends AbstractFrameReflower
{
    
/**
     * Frame for this reflower
     *
     * @var TableFrameDecorator
     */
    
protected $_frame;

    
/**
     * Cache of results between call to get_min_max_width and assign_widths
     *
     * @var array
     */
    
protected $_state;

    function 
__construct(TableFrameDecorator $frame)
    {
        
$this->_state null;
        
parent::__construct($frame);
    }

    
/**
     * State is held here so it needs to be reset along with the decorator
     */
    
function reset()
    {
        
$this->_state null;
        
$this->_min_max_cache null;
    }

    
//........................................................................

    
protected function _assign_widths()
    {
        
$style $this->_frame->get_style();

        
// Find the min/max width of the table and sort the columns into
        // absolute/percent/auto arrays
        
$min_width $this->_state["min_width"];
        
$max_width $this->_state["max_width"];
        
$percent_used $this->_state["percent_used"];
        
$absolute_used $this->_state["absolute_used"];
        
$auto_min $this->_state["auto_min"];

        
$absolute =& $this->_state["absolute"];
        
$percent =& $this->_state["percent"];
        
$auto =& $this->_state["auto"];

        
// Determine the actual width of the table
        
$cb $this->_frame->get_containing_block();
        
$columns =& $this->_frame->get_cellmap()->get_columns();

        
$width $style->width;

        
// Calculate padding & border fudge factor
        
$left $style->margin_left;
        
$right $style->margin_right;

        
$centered = ($left === "auto" && $right === "auto");

        
$left $left === "auto" $style->length_in_pt($left$cb["w"]);
        
$right $right === "auto" $style->length_in_pt($right$cb["w"]);

        
$delta $left $right;

        if (!
$centered) {
            
$delta += $style->length_in_pt(array(
                    
$style->padding_left,
                    
$style->border_left_width,
                    
$style->border_right_width,
                    
$style->padding_right),
                
$cb["w"]);
        }

        
$min_table_width $style->length_in_pt($style->min_width$cb["w"] - $delta);

        
// min & max widths already include borders & padding
        
$min_width -= $delta;
        
$max_width -= $delta;

        if (
$width !== "auto") {

            
$preferred_width $style->length_in_pt($width$cb["w"]) - $delta;

            if (
$preferred_width $min_table_width)
                
$preferred_width $min_table_width;

            if (
$preferred_width $min_width)
                
$width $preferred_width;
            else
                
$width $min_width;

        } else {

            if (
$max_width $delta $cb["w"])
                
$width $max_width;
            else if (
$cb["w"] - $delta $min_width)
                
$width $cb["w"] - $delta;
            else
                
$width $min_width;

            if (
$width $min_table_width)
                
$width $min_table_width;

        }

        
// Store our resolved width
        
$style->width $width;

        
$cellmap $this->_frame->get_cellmap();

        if (
$cellmap->is_columns_locked()) {
            return;
        }

        
// If the whole table fits on the page, then assign each column it's max width
        
if ($width == $max_width) {

            foreach (
array_keys($columns) as $i)
                
$cellmap->set_column_width($i$columns[$i]["max-width"]);

            return;
        }

        
// Determine leftover and assign it evenly to all columns
        
if ($width $min_width) {

            
// We have four cases to deal with:
            //
            // 1. All columns are auto--no widths have been specified.  In this
            // case we distribute extra space across all columns weighted by max-width.
            //
            // 2. Only absolute widths have been specified.  In this case we
            // distribute any extra space equally among 'width: auto' columns, or all
            // columns if no auto columns have been specified.
            //
            // 3. Only percentage widths have been specified.  In this case we
            // normalize the percentage values and distribute any remaining % to
            // width: auto columns.  We then proceed to assign widths as fractions
            // of the table width.
            //
            // 4. Both absolute and percentage widths have been specified.

            
$increment 0;

            
// Case 1:
            
if ($absolute_used == && $percent_used == 0) {
                
$increment $width $min_width;

                foreach (
array_keys($columns) as $i) {
                    
$cellmap->set_column_width($i$columns[$i]["min-width"] + $increment * ($columns[$i]["max-width"] / $max_width));
                }
                return;
            }


            
// Case 2
            
if ($absolute_used && $percent_used == 0) {

                if (
count($auto) > 0)
                    
$increment = ($width $auto_min $absolute_used) / count($auto);

                
// Use the absolutely specified width or the increment
                
foreach (array_keys($columns) as $i) {

                    if (
$columns[$i]["absolute"] > && count($auto))
                        
$cellmap->set_column_width($i$columns[$i]["min-width"]);
                    else if (
count($auto))
                        
$cellmap->set_column_width($i$columns[$i]["min-width"] + $increment);
                    else {
                        
// All absolute columns
                        
$increment = ($width $absolute_used) * $columns[$i]["absolute"] / $absolute_used;

                        
$cellmap->set_column_width($i$columns[$i]["min-width"] + $increment);
                    }

                }
                return;
            }


            
// Case 3:
            
if ($absolute_used == && $percent_used 0) {

                
$scale null;
                
$remaining null;

                
// Scale percent values if the total percentage is > 100, or if all
                // values are specified as percentages.
                
if ($percent_used 100 || count($auto) == 0)
                    
$scale 100 $percent_used;
                else
                    
$scale 1;

                
// Account for the minimum space used by the unassigned auto columns
                
$used_width $auto_min;

                foreach (
$percent as $i) {
                    
$columns[$i]["percent"] *= $scale;

                    
$slack $width $used_width;

                    
$w min($columns[$i]["percent"] * $width 100$slack);

                    if (
$w $columns[$i]["min-width"])
                        
$w $columns[$i]["min-width"];

                    
$cellmap->set_column_width($i$w);
                    
$used_width += $w;

                }

                
// This works because $used_width includes the min-width of each
                // unassigned column
                
if (count($auto) > 0) {
                    
$increment = ($width $used_width) / count($auto);

                    foreach (
$auto as $i)
                        
$cellmap->set_column_width($i$columns[$i]["min-width"] + $increment);

                }
                return;
            }

            
// Case 4:

            // First-come, first served
            
if ($absolute_used && $percent_used 0) {

                
$used_width $auto_min;

                foreach (
$absolute as $i) {
                    
$cellmap->set_column_width($i$columns[$i]["min-width"]);
                    
$used_width += $columns[$i]["min-width"];
                }

                
// Scale percent values if the total percentage is > 100 or there
                // are no auto values to take up slack
                
if ($percent_used 100 || count($auto) == 0)
                    
$scale 100 $percent_used;
                else
                    
$scale 1;

                
$remaining_width $width $used_width;

                foreach (
$percent as $i) {
                    
$slack $remaining_width $used_width;

                    
$columns[$i]["percent"] *= $scale;
                    
$w min($columns[$i]["percent"] * $remaining_width 100$slack);

                    if (
$w $columns[$i]["min-width"])
                        
$w $columns[$i]["min-width"];

                    
$columns[$i]["used-width"] = $w;
                    
$used_width += $w;
                }

                if (
count($auto) > 0) {
                    
$increment = ($width $used_width) / count($auto);

                    foreach (
$auto as $i)
                        
$cellmap->set_column_width($i$columns[$i]["min-width"] + $increment);

                }

                return;
            }


        } else { 
// we are over constrained

            // Each column gets its minimum width
            
foreach (array_keys($columns) as $i)
                
$cellmap->set_column_width($i$columns[$i]["min-width"]);

        }
    }

    
//........................................................................

    // Determine the frame's height based on min/max height
    
protected function _calculate_height()
    {

        
$style $this->_frame->get_style();
        
$height $style->height;

        
$cellmap $this->_frame->get_cellmap();
        
$cellmap->assign_frame_heights();
        
$rows $cellmap->get_rows();

        
// Determine our content height
        
$content_height 0;
        foreach (
$rows as $r)
            
$content_height += $r["height"];

        
$cb $this->_frame->get_containing_block();

        if (!(
$style->overflow === "visible" ||
            (
$style->overflow === "hidden" && $height === "auto"))
        ) {

            
// Only handle min/max height if the height is independent of the frame's content

            
$min_height $style->min_height;
            
$max_height $style->max_height;

            if (isset(
$cb["h"])) {
                
$min_height $style->length_in_pt($min_height$cb["h"]);
                
$max_height $style->length_in_pt($max_height$cb["h"]);

            } else if (isset(
$cb["w"])) {

                if (
mb_strpos($min_height"%") !== false)
                    
$min_height 0;
                else
                    
$min_height $style->length_in_pt($min_height$cb["w"]);

                if (
mb_strpos($max_height"%") !== false)
                    
$max_height "none";
                else
                    
$max_height $style->length_in_pt($max_height$cb["w"]);
            }

            if (
$max_height !== "none" && $min_height $max_height)
                
// Swap 'em
                
list($max_height$min_height) = array($min_height$max_height);

            if (
$max_height !== "none" && $height $max_height)
                
$height $max_height;

            if (
$height $min_height)
                
$height $min_height;

        } else {

            
// Use the content height or the height value, whichever is greater
            
if ($height !== "auto") {
                
$height $style->length_in_pt($height$cb["h"]);

                if (
$height <= $content_height)
                    
$height $content_height;
                else
                    
$cellmap->set_frame_heights($height$content_height);

            } else
                
$height $content_height;

        }

        return 
$height;

    }
    
//........................................................................

    /**
     * @param BlockFrameDecorator $block
     */
    
function reflow(BlockFrameDecorator $block null)
    {
        
/** @var TableFrameDecorator */
        
$frame $this->_frame;

        
// Check if a page break is forced
        
$page $frame->get_root();
        
$page->check_forced_page_break($frame);

        
// Bail if the page is full
        
if ($page->is_full())
            return;

        
// Let the page know that we're reflowing a table so that splits
        // are suppressed (simply setting page-break-inside: avoid won't
        // work because we may have an arbitrary number of block elements
        // inside tds.)
        
$page->table_reflow_start();

        
// Collapse vertical margins, if required
        
$this->_collapse_margins();

        
$frame->position();

        
// Table layout algorithm:
        // http://www.w3.org/TR/CSS21/tables.html#auto-table-layout

        
if (is_null($this->_state))
            
$this->get_min_max_width();

        
$cb $frame->get_containing_block();
        
$style $frame->get_style();

        
// This is slightly inexact, but should be okay.  Add half the
        // border-spacing to the table as padding.  The other half is added to
        // the cells themselves.
        
if ($style->border_collapse === "separate") {
            list(
$h$v) = $style->border_spacing;

            
$v $style->length_in_pt($v) / 2;
            
$h $style->length_in_pt($h) / 2;

            
$style->padding_left $style->length_in_pt($style->padding_left$cb["w"]) + $h;
            
$style->padding_right $style->length_in_pt($style->padding_right$cb["w"]) + $h;
            
$style->padding_top $style->length_in_pt($style->padding_top$cb["h"]) + $v;
            
$style->padding_bottom $style->length_in_pt($style->padding_bottom$cb["h"]) + $v;

        }

        
$this->_assign_widths();

        
// Adjust left & right margins, if they are auto
        
$width $style->width;
        
$left $style->margin_left;
        
$right $style->margin_right;

        
$diff $cb["w"] - $width;

        if (
$left === "auto" && $right === "auto") {
            if (
$diff 0) {
                
$left 0;
                
$right $diff;
            } else {
                
$left $right $diff 2;
            }

            
$style->margin_left "$left pt";
            
$style->margin_right "$right pt";

        } else {
            if (
$left === "auto") {
                
$left $style->length_in_pt($cb["w"] - $right $width$cb["w"]);
            }
            if (
$right === "auto") {
                
$left $style->length_in_pt($left$cb["w"]);
            }
        }

        list(
$x$y) = $frame->get_position();

        
// Determine the content edge
        
$content_x $x $left $style->length_in_pt(array($style->padding_left,
                
$style->border_left_width), $cb["w"]);
        
$content_y $y $style->length_in_pt(array($style->margin_top,
                
$style->border_top_width,
                
$style->padding_top), $cb["h"]);

        if (isset(
$cb["h"]))
            
$h $cb["h"];
        else
            
$h null;

        
$cellmap $frame->get_cellmap();
        
$col =& $cellmap->get_column(0);
        
$col["x"] = $content_x;

        
$row =& $cellmap->get_row(0);
        
$row["y"] = $content_y;

        
$cellmap->assign_x_positions();

        
// Set the containing block of each child & reflow
        
foreach ($frame->get_children() as $child) {

            
// Bail if the page is full
            
if (!$page->in_nested_table() && $page->is_full())
                break;

            
$child->set_containing_block($content_x$content_y$width$h);
            
$child->reflow();

            if (!
$page->in_nested_table())
                
// Check if a split has occured
                
$page->check_page_break($child);

        }

        
// Assign heights to our cells:
        
$style->height $this->_calculate_height();

        if (
$style->border_collapse === "collapse") {
            
// Unset our borders because our cells are now using them
            
$style->border_style "none";
        }

        
$page->table_reflow_end();

        
// Debugging:
        //echo ($this->_frame->get_cellmap());

        
if ($block && $style->float === "none" && $frame->is_in_flow()) {
            
$block->add_frame_to_line($frame);
            
$block->add_line();
        }
    }

    
//........................................................................

    
function get_min_max_width()
    {

        if (!
is_null($this->_min_max_cache))
            return 
$this->_min_max_cache;

        
$style $this->_frame->get_style();

        
$this->_frame->normalise();

        
// Add the cells to the cellmap (this will calcluate column widths as
        // frames are added)
        
$this->_frame->get_cellmap()->add_frame($this->_frame);

        
// Find the min/max width of the table and sort the columns into
        // absolute/percent/auto arrays
        
$this->_state = array();
        
$this->_state["min_width"] = 0;
        
$this->_state["max_width"] = 0;

        
$this->_state["percent_used"] = 0;
        
$this->_state["absolute_used"] = 0;
        
$this->_state["auto_min"] = 0;

        
$this->_state["absolute"] = array();
        
$this->_state["percent"] = array();
        
$this->_state["auto"] = array();

        
$columns =& $this->_frame->get_cellmap()->get_columns();
        foreach (
array_keys($columns) as $i) {
            
$this->_state["min_width"] += $columns[$i]["min-width"];
            
$this->_state["max_width"] += $columns[$i]["max-width"];

            if (
$columns[$i]["absolute"] > 0) {
                
$this->_state["absolute"][] = $i;
                
$this->_state["absolute_used"] += $columns[$i]["absolute"];

            } else if (
$columns[$i]["percent"] > 0) {
                
$this->_state["percent"][] = $i;
                
$this->_state["percent_used"] += $columns[$i]["percent"];

            } else {
                
$this->_state["auto"][] = $i;
                
$this->_state["auto_min"] += $columns[$i]["min-width"];
            }
        }

        
// Account for margins & padding
        
$dims = array($style->border_left_width,
            
$style->border_right_width,
            
$style->padding_left,
            
$style->padding_right,
            
$style->margin_left,
            
$style->margin_right);

        if (
$style->border_collapse !== "collapse")
            list(
$dims[]) = $style->border_spacing;

        
$delta $style->length_in_pt($dims$this->_frame->get_containing_block("w"));

        
$this->_state["min_width"] += $delta;
        
$this->_state["max_width"] += $delta;

        return 
$this->_min_max_cache = array(
            
$this->_state["min_width"],
            
$this->_state["max_width"],
            
"min" => $this->_state["min_width"],
            
"max" => $this->_state["max_width"],
        );
    }
}