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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
- */
- /**
- * Positions absolutely positioned frames
- */
- class Absolute_Positioner extends Positioner {
- function __construct(Frame_Decorator $frame) { parent::__construct($frame); }
- function position() {
- $frame = $this->_frame;
- $style = $frame->get_style();
-
- $p = $frame->find_positionned_parent();
-
- list($x, $y, $w, $h) = $frame->get_containing_block();
- $top = $style->length_in_pt($style->top, $h);
- $right = $style->length_in_pt($style->right, $w);
- $bottom = $style->length_in_pt($style->bottom, $h);
- $left = $style->length_in_pt($style->left, $w);
-
- if ( $p && !($left === "auto" && $right === "auto") ) {
- // Get the parent's padding box (see http://www.w3.org/TR/CSS21/visuren.html#propdef-top)
- list($x, $y, $w, $h) = $p->get_padding_box();
- }
-
- list($width, $height) = array($frame->get_margin_width(), $frame->get_margin_height());
-
- $orig_style = $this->_frame->get_original_style();
- $orig_width = $orig_style->width;
- $orig_height = $orig_style->height;
-
- /****************************
-
- Width auto:
- ____________| left=auto | left=fixed |
- right=auto | A | B |
- right=fixed | C | D |
-
- Width fixed:
- ____________| left=auto | left=fixed |
- right=auto | E | F |
- right=fixed | G | H |
-
- *****************************/
-
- if ( $left === "auto" ) {
- if ( $right === "auto" ) {
- // A or E - Keep the frame at the same position
- }
- else {
- if ( $orig_width === "auto" ) {
- // C
- $x += $w - $width - $right;
- }
- else {
- // G
- $x += $w - $width - $right;
- }
- }
- }
- else {
- if ( $right === "auto" ) {
- // B or F
- $x += $left;
- }
- else {
- if ( $orig_width === "auto" ) {
- // D - TODO change width
- $x += $left;
- }
- else {
- // H - Everything is fixed: left + width win
- $x += $left;
- }
- }
- }
-
- // The same vertically
- if ( $top === "auto" ) {
- if ( $bottom === "auto" ) {
- // A or E - Keep the frame at the same position
- $y = $frame->get_parent()->get_current_line_box()->y;
- }
- else {
- if ( $orig_height === "auto" ) {
- // C
- $y += $h - $height - $bottom;
- }
- else {
- // G
- $y += $h - $height - $bottom;
- }
- }
- }
- else {
- if ( $bottom === "auto" ) {
- // B or F
- $y += $top;
- }
- else {
- if ( $orig_height === "auto" ) {
- // D - TODO change height
- $y += $top;
- }
- else {
- // H - Everything is fixed: top + height win
- $y += $top;
- }
- }
- }
-
- $frame->set_position($x, $y);
- }
- }
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