protected function _layout_line()
{
$style = $this->_frame->get_style();
$text = $this->_frame->get_text();
$size = $style->font_size;
$font = $style->font_family;
$word_spacing = $style->length_in_pt($style->word_spacing);
$char_spacing = $style->length_in_pt($style->letter_spacing);
// Determine the text height
$style->height = Font_Metrics::get_font_height($font, $size);
$split = false;
$add_line = false;
// Handle text transform:
// http://www.w3.org/TR/CSS21/text.html#propdef-text-transform
switch (strtolower($style->text_transform)) {
default:
break;
case "capitalize":
$text = mb_convert_case($text, MB_CASE_TITLE);
break;
case "uppercase":
$text = mb_convert_case($text, MB_CASE_UPPER);
break;
case "lowercase":
$text = mb_convert_case($text, MB_CASE_LOWER);
break;
}
// Handle white-space property:
// http://www.w3.org/TR/CSS21/text.html#propdef-white-space
switch ($style->white_space) {
default:
case "normal":
$this->_frame->set_text($text = $this->_collapse_white_space($text));
if ($text == "") {
break;
}
$split = $this->_line_break($text);
break;
case "pre":
$split = $this->_newline_break($text);
$add_line = $split !== false;
break;
case "nowrap":
$this->_frame->set_text($text = $this->_collapse_white_space($text));
break;
case "pre-wrap":
$split = $this->_newline_break($text);
if (($tmp = $this->_line_break($text)) !== false) {
$add_line = $split < $tmp;
$split = min($tmp, $split);
} else {
$add_line = true;
}
break;
case "pre-line":
// Collapse white-space except for \n
$this->_frame->set_text($text = preg_replace("/[ \t]+/u", " ", $text));
if ($text == "") {
break;
}
$split = $this->_newline_break($text);
if (($tmp = $this->_line_break($text)) !== false) {
$add_line = $split < $tmp;
$split = min($tmp, $split);
} else {
$add_line = true;
}
break;
}
// Handle degenerate case
if ($text === "") {
return;
}
if ($split !== false) {
// Handle edge cases
if ($split == 0 && $text === " ") {
$this->_frame->set_text("");
return;
}
if ($split == 0) {
// Trim newlines from the beginning of the line
//$this->_frame->set_text(ltrim($text, "\n\r"));
$this->_block_parent->add_line();
$this->_frame->position();
// Layout the new line
$this->_layout_line();
} else {
if ($split < mb_strlen($this->_frame->get_text())) {
// split the line if required
$this->_frame->split_text($split);
$t = $this->_frame->get_text();
// Remove any trailing newlines
if ($split > 1 && $t[$split - 1] === "\n") {
$this->_frame->set_text(mb_substr($t, 0, -1));
}
// Do we need to trim spaces on wrapped lines? This might be desired, however, we
// can't trim the lines here or the layout will be affected if trimming the line
// leaves enough space to fit the next word in the text stream (because pdf layout
// is performed elsewhere).
/*if (!$this->_frame->get_prev_sibling() && !$this->_frame->get_next_sibling()) {
$t = $this->_frame->get_text();
$this->_frame->set_text( trim($t) );
}*/
}
}
if ($add_line) {
$this->_block_parent->add_line();
$this->_frame->position();
}
} else {
// Remove empty space from start and end of line, but only where there isn't an inline sibling
// and the parent node isn't an inline element with siblings
// FIXME: Include non-breaking spaces?
$t = $this->_frame->get_text();
$parent = $this->_frame->get_parent();
$is_inline_frame = get_class($parent) === 'Inline_Frame_Decorator';
if (!$is_inline_frame && !$this->_frame->get_next_sibling() || $is_inline_frame && !$parent->get_next_sibling()) {
$t = rtrim($t);
}
if (!$is_inline_frame && !$this->_frame->get_prev_sibling() || $is_inline_frame && !$parent->get_prev_sibling()) {
$t = ltrim($t);
}
$this->_frame->set_text($t);
}
// Set our new width
$width = $this->_frame->recalculate_width();
}
