/** * @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(); } } }