protected function _layout_line()
{
$frame = $this->_frame;
$style = $frame->get_style();
$text = $frame->get_text();
$size = $style->font_size;
$font = $style->font_family;
// Determine the text height
$style->height = $this->getFontMetrics()->getFontHeight($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":
$frame->set_text($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":
$frame->set_text($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
$frame->set_text($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 === " ") {
$frame->set_text("");
return;
}
if ($split == 0) {
// Trim newlines from the beginning of the line
//$this->_frame->set_text(ltrim($text, "\n\r"));
$this->_block_parent->add_line();
$frame->position();
// Layout the new line
$this->_layout_line();
} else {
if ($split < mb_strlen($frame->get_text())) {
// split the line if required
$frame->split_text($split);
$t = $frame->get_text();
// Remove any trailing newlines
if ($split > 1 && $t[$split - 1] === "\n" && !$frame->is_pre()) {
$frame->set_text(mb_substr($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();
$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 = $frame->get_text();
$parent = $frame->get_parent();
$is_inline_frame = get_class($parent) === 'Inline_Frame_Decorator';
if (!$is_inline_frame && !$frame->get_next_sibling()) {
// fails <b>BOLD <u>UNDERLINED</u></b> becomes <b>BOLD<u>UNDERLINED</u></b>
$t = rtrim($t);
}
if (!$is_inline_frame && !$frame->get_prev_sibling()) {
// <span><span>A<span>B</span> C</span></span> fails (the whitespace is removed)
$t = ltrim($t);
}
$frame->set_text($t);
}
// Set our new width
$width = $frame->recalculate_width();
}
/**
* @param BlockFrameDecorator $block
*/
function reflow(BlockFrameDecorator $block = null)
{
// Check if a page break is forced
$page = $this->_frame->get_root();
$page->check_forced_page_break($this->_frame);
// Bail if the page is full
if ($page->is_full()) {
return;
}
// Generated content
$this->_set_content();
// Collapse margins if required
$this->_collapse_margins();
$style = $this->_frame->get_style();
$cb = $this->_frame->get_containing_block();
if ($style->position === "fixed") {
$cb = $this->_frame->get_root()->get_containing_block();
}
// Determine the constraints imposed by this frame: calculate the width
// of the content area:
list($w, $left_margin, $right_margin, $left, $right) = $this->_calculate_restricted_width();
// Store the calculated properties
$style->width = $w;
$style->margin_left = $left_margin;
$style->margin_right = $right_margin;
$style->left = $left;
$style->right = $right;
// Update the position
$this->_frame->position();
list($x, $y) = $this->_frame->get_position();
// Adjust the first line based on the text-indent property
$indent = $style->length_in_pt($style->text_indent, $cb["w"]);
$this->_frame->increase_line_width($indent);
// Determine the content edge
$top = $style->length_in_pt(array($style->margin_top, $style->padding_top, $style->border_top_width), $cb["h"]);
$bottom = $style->length_in_pt(array($style->border_bottom_width, $style->margin_bottom, $style->padding_bottom), $cb["h"]);
$cb_x = $x + $left_margin + $style->length_in_pt(array($style->border_left_width, $style->padding_left), $cb["w"]);
$cb_y = $y + $top;
$cb_h = $cb["h"] + $cb["y"] - $bottom - $cb_y;
// Set the y position of the first line in this block
$line_box = $this->_frame->get_current_line_box();
$line_box->y = $cb_y;
$line_box->get_float_offsets();
// Set the containing blocks and reflow each child
foreach ($this->_frame->get_children() as $child) {
// Bail out if the page is full
if ($page->is_full()) {
break;
}
$child->set_containing_block($cb_x, $cb_y, $w, $cb_h);
$this->process_clear($child);
$child->reflow($this->_frame);
// Don't add the child to the line if a page break has occurred
if ($page->check_page_break($child)) {
break;
}
$this->process_float($child, $cb_x, $w);
}
// Determine our height
list($height, $margin_top, $margin_bottom, $top, $bottom) = $this->_calculate_restricted_height();
$style->height = $height;
$style->margin_top = $margin_top;
$style->margin_bottom = $margin_bottom;
$style->top = $top;
$style->bottom = $bottom;
$orig_style = $this->_frame->get_original_style();
$needs_reposition = $style->position === "absolute" && ($style->right !== "auto" || $style->bottom !== "auto");
// Absolute positioning measurement
if ($needs_reposition) {
if ($orig_style->width === "auto" && ($orig_style->left === "auto" || $orig_style->right === "auto")) {
$width = 0;
foreach ($this->_frame->get_line_boxes() as $line) {
$width = max($line->w, $width);
}
$style->width = $width;
}
$style->left = $orig_style->left;
$style->right = $orig_style->right;
}
// Calculate inline-block / float auto-widths
if (($style->display === "inline-block" || $style->float !== 'none') && $orig_style->width === 'auto') {
$width = 0;
foreach ($this->_frame->get_line_boxes() as $line) {
$line->recalculate_width();
$width = max($line->w, $width);
}
if ($width === 0) {
foreach ($this->_frame->get_children() as $child) {
$width += $child->calculate_auto_width();
}
}
$style->width = $width;
}
$this->_text_align();
$this->vertical_align();
// Absolute positioning
if ($needs_reposition) {
list($x, $y) = $this->_frame->get_position();
$this->_frame->position();
list($new_x, $new_y) = $this->_frame->get_position();
$this->_frame->move($new_x - $x, $new_y - $y, true);
}
if ($block && $this->_frame->is_in_flow()) {
$block->add_frame_to_line($this->_frame);
// May be inline-block
if ($style->display === "block") {
$block->add_line();
}
}
}
/**
* @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();
}
}