Primer commit del sistema avantika sin cambios
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245
pdf/include/page_frame_reflower.cls.php
Executable file
245
pdf/include/page_frame_reflower.cls.php
Executable file
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<?php
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/**
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* DOMPDF - PHP5 HTML to PDF renderer
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*
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* File: $RCSfile: page_frame_reflower.cls.php,v $
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* Created on: 2004-06-16
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*
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* Copyright (c) 2004 - Benj Carson <benjcarson@digitaljunkies.ca>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library in the file LICENSE.LGPL; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA
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*
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* Alternatively, you may distribute this software under the terms of the
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* PHP License, version 3.0 or later. A copy of this license should have
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* been distributed with this file in the file LICENSE.PHP . If this is not
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* the case, you can obtain a copy at http://www.php.net/license/3_0.txt.
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*
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* The latest version of DOMPDF might be available at:
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* http://www.dompdf.com/
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*
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* @link http://www.dompdf.com/
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* @copyright 2004 Benj Carson
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* @author Benj Carson <benjcarson@digitaljunkies.ca>
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* @package dompdf
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*/
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/* $Id: page_frame_reflower.cls.php 357 2011-01-30 20:56:46Z fabien.menager $ */
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/**
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* Reflows pages
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*
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* @access private
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* @package dompdf
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*/
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class Page_Frame_Reflower extends Frame_Reflower {
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/**
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* Cache of the callbacks array
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*
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* @var array
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*/
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private $_callbacks;
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/**
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* Cache of the canvas
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*
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* @var Canvas
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*/
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private $_canvas;
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/**
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* This page's floating frames
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*
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* @var array
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*/
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private $_floating_frames;
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/**
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* true if the page has floating frales
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* Used to improve performances as it will
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* be accesses everytime
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* @var bool
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*/
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private $_has_floating_frames;
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/**
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* The stacking context, containing all z-indexed frames
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* @var array
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*/
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private $_stacking_context = array();
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function __construct(Page_Frame_Decorator $frame) { parent::__construct($frame); }
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/**
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* @return array
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*/
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function get_floating_frames() { return $this->_floating_frames; }
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/**
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* @param $frame Frame
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* @return void
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*/
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function add_frame_to_stacking_context(Frame $frame, $z_index) {
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$this->_stacking_context[$z_index][] = $frame;
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}
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/**
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* Add a floating frame
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*
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* @param $child Frame
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*/
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function add_floating_frame(Frame $frame) {
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$this->_floating_frames[] = $frame;
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$this->_has_floating_frames = true;
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}
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/**
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* Tells if the page has floating frames
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*
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* @return bool
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*/
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function has_floating_frames() {
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return $this->_has_floating_frames;
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}
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//........................................................................
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function reflow(Frame_Decorator $block = null) {
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$style = $this->_frame->get_style();
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// Paged layout:
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// http://www.w3.org/TR/CSS21/page.html
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// Pages are only concerned with margins
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$cb = $this->_frame->get_containing_block();
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$left = $style->length_in_pt($style->margin_left, $cb["w"]);
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$right = $style->length_in_pt($style->margin_right, $cb["w"]);
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$top = $style->length_in_pt($style->margin_top, $cb["h"]);
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$bottom = $style->length_in_pt($style->margin_bottom, $cb["h"]);
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$content_x = $cb["x"] + $left;
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$content_y = $cb["y"] + $top;
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$content_width = $cb["w"] - $left - $right;
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$content_height = $cb["h"] - $top - $bottom;
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$fixed_children = array();
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$prev_child = null;
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$child = $this->_frame->get_first_child();
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$current_page = 0;
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while ($child) {
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// Only if it's the first page, we save the nodes with a fixed position
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if ($current_page == 0) {
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$children = $child->get_children();
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foreach ($children as $onechild) {
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if ($onechild->get_style()->position === "fixed") {
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$fixed_children[] = $onechild->deep_copy();
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}
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}
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$fixed_children = array_reverse($fixed_children);
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}
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$child->set_containing_block($content_x, $content_y, $content_width, $content_height);
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// Check for begin reflow callback
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$this->_check_callbacks("begin_page_reflow", $child);
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//Insert a copy of each node which have a fixed position
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if ($current_page >= 1) {
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foreach ($fixed_children as $fixed_child) {
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$child->insert_child_before($fixed_child->deep_copy(), $child->get_first_child());
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}
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}
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$child->reflow();
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$next_child = $child->get_next_sibling();
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// Check for begin render callback
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$this->_check_callbacks("begin_page_render", $child);
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$renderer = $this->_frame->get_renderer();
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// Render the page
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$renderer->render($child);
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// http://www.w3.org/TR/CSS21/visuren.html#z-index
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ksort($this->_stacking_context);
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foreach( $this->_stacking_context as $_z_index => $_frames ) {
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foreach ( $_frames as $_frame ) {
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$renderer->render($_frame);
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}
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}
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$this->_stacking_context = array();
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// Check for end render callback
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$this->_check_callbacks("end_page_render", $child);
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if ( $next_child ) {
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$this->_frame->next_page();
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}
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// Wait to dispose of all frames on the previous page
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// so callback will have access to them
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if ( $prev_child ) {
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$prev_child->dispose(true);
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}
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$prev_child = $child;
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$child = $next_child;
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$current_page++;
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}
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// Dispose of previous page if it still exists
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if ( $prev_child ) {
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$prev_child->dispose(true);
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}
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}
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//........................................................................
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/**
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* Check for callbacks that need to be performed when a given event
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* gets triggered on a page
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*
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* @param string $event the type of event
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* @param Frame $frame the frame that event is triggered on
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*/
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protected function _check_callbacks($event, $frame) {
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if (!isset($this->_callbacks)) {
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$dompdf = $this->_frame->get_dompdf();
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$this->_callbacks = $dompdf->get_callbacks();
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$this->_canvas = $dompdf->get_canvas();
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}
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if (is_array($this->_callbacks) && isset($this->_callbacks[$event])) {
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$info = array(0 => $this->_canvas, "canvas" => $this->_canvas,
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1 => $frame, "frame" => $frame);
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$fs = $this->_callbacks[$event];
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foreach ($fs as $f) {
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if (is_callable($f)) {
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if (is_array($f)) {
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$f[0]->$f[1]($info);
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} else {
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$f($info);
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}
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}
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}
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}
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}
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}
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