/**
* CSS 2.1 p.16.6
* white-space: normal
* This value directs user agents to collapse sequences of whitespace, and break lines as necessary to fill line boxes.
*/
function build(&$box, $text, &$pipeline)
{
$text = $this->remove_leading_linefeeds($text);
$text = $this->remove_trailing_linefeeds($text);
$content = $this->collapse_whitespace($text);
// Whitespace-only text nodes sill result on only one whitespace box
if (trim($content) === '') {
$whitespace =& WhitespaceBox::create($pipeline);
$box->add_child($whitespace);
return;
}
// Add leading whispace box, if content stars with a space
if (preg_match('/ /u', substr($content, 0, 1))) {
$whitespace =& WhitespaceBox::create($pipeline);
$box->add_child($whitespace);
}
$words = $this->break_into_words($content);
$size = count($words);
$pos = 0;
// Check if text content has trailing whitespace
$last_whitespace = substr($content, strlen($content) - 1, 1) == ' ';
foreach ($words as $word) {
$box->process_word($word, $pipeline);
$pos++;
$is_last_word = $pos == $size;
// Whitespace boxes should be added
// 1) between words
// 2) after the last word IF there was a space at the content end
if (!$is_last_word || $last_whitespace) {
$whitespace =& WhitespaceBox::create($pipeline);
$box->add_child($whitespace);
}
}
}
/**
* CSS 2.1 p.16.6
* white-space: normal
* This value directs user agents to collapse sequences of whitespace, and break lines as necessary to fill line boxes.
*/
function build(&$box, $text, &$pipeline)
{
$text = $this->remove_leading_linefeeds($text);
$text = $this->remove_trailing_linefeeds($text);
$lines = $this->break_into_lines($text);
foreach ($lines as $line) {
$words = $this->break_into_words($this->collapse_whitespace($line));
foreach ($words as $word) {
$box->process_word($word, $pipeline);
$whitespace =& WhitespaceBox::create($pipeline);
$box->add_child($whitespace);
}
$this->add_line_break($box, $pipeline);
}
}
/**
* CSS 2.1 16.6 Whitespace: the 'white-space' property
*
* pre-wrap:
*
* This value prevents user agents from collapsing sequences of
* whitespace. Lines are broken at newlines in the source, at
* occurrences of "\A" in generated content, and as necessary to
* fill line boxes.
*/
function build(&$box, $text, &$pipeline)
{
$text = $this->remove_trailing_linefeeds($text);
$parent =& $box->get_parent_node();
$lines = $this->break_into_lines($text);
for ($i = 0, $size = count($lines); $i < $size; $i++) {
$line = $lines[$i];
$words = $this->break_into_words($line);
foreach ($words as $word) {
$word .= ' ';
$box->process_word($word, $pipeline);
$whitespace =& WhitespaceBox::create($pipeline);
$box->add_child($whitespace);
}
if ((!$parent || $parent->isBlockLevel()) && $i < $size - 1) {
$this->add_line_break($box, $pipeline);
}
}
}
function &create(&$root, &$pipeline)
{
// Create contents of this inline box
if ($root->node_type() == XML_TEXT_NODE) {
$css_state =& $pipeline->getCurrentCSSState();
return InlineBox::create_from_text($root->content, $css_state->getProperty(CSS_WHITE_SPACE), $pipeline);
} else {
$box =& new InlineBox();
$css_state =& $pipeline->getCurrentCSSState();
$box->readCSS($css_state);
// Initialize content
$child = $root->first_child();
while ($child) {
$child_box =& create_pdf_box($child, $pipeline);
$box->add_child($child_box);
$child = $child->next_sibling();
}
// Add fake whitespace box with zero size for the anchor spans
// We need this, as "reflow" functions will automatically remove empty inline boxes from the
// document tree
//
if ($box->is_null()) {
$css_state->pushState();
$css_state->setProperty(CSS_FONT_SIZE, Value::fromData(0.01, UNIT_PT));
$whitespace = WhitespaceBox::create($pipeline);
$whitespace->readCSS($css_state);
$box->add_child($whitespace);
$css_state->popState();
}
}
return $box;
}
function init_white_space_normal($raw_content)
{
$content = preg_replace("/[\r\n\t ]/", ' ', $raw_content);
// Whitespace-only text nodes sill result on only one whitespace box
if (trim($content) === "") {
$this->add_child(WhitespaceBox::create());
return;
}
if (preg_match("# #", substr($content, 0, 1))) {
$this->add_child(WhitespaceBox::create());
}
$words = preg_split("/ /", $content);
$prefix = "";
for ($i = 0; $i < count($words); $i++) {
$word = $prefix . $words[$i];
// Skip zero-length words
if (strlen($word) == 0) {
continue;
}
// Check if this word is terminated by a partially-completed
// unicode symbol; in this case we've made a break here incorrectly on
// the non-breaking space
//
// So, we'll concatenate whis with with the next word
// dropping partially parsed unicode symbol and replacing it by a space
//
if ($word[strlen($word) - 1] == chr(0xc2)) {
$prefix = substr($word, 0, strlen($word) - 1) . " ";
continue;
}
$prefix = "";
if ($word !== "") {
$this->process_word($word);
// we need to make space between words in 2 cases:
// 1. if there will be another words in the same text node
// 2. if it is the last words AND there's space(s) at the end of the text content.
// e.g.: text<b>xxx </font>some more text
if ($i < count($words) - 1 || preg_match("#\\s#", substr($content, strlen($content) - 1, 1))) {
$this->add_child(WhitespaceBox::create());
}
}
}
}