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<?php |
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/** |
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* @package dompdf |
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* @link https://github.com/dompdf/dompdf |
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* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License |
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*/ |
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namespace Dompdf\Renderer; |
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|
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use Dompdf\Adapter\CPDF; |
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use Dompdf\Frame; |
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|
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/** |
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* Renders text frames |
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* |
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* @package dompdf |
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*/ |
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class Text extends AbstractRenderer |
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{ |
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/** Thickness of underline. Screen: 0.08, print: better less, e.g. 0.04 */ |
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const DECO_THICKNESS = 0.02; |
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|
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//Tweaking if $base and $descent are not accurate. |
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//Check method_exists( $this->_canvas, "get_cpdf" ) |
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//- For cpdf these can and must stay 0, because font metrics are used directly. |
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//- For other renderers, if different values are wanted, separate the parameter sets. |
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// But $size and $size-$height seem to be accurate enough |
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|
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/** Relative to bottom of text, as fraction of height */ |
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const UNDERLINE_OFFSET = 0.0; |
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|
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/** Relative to top of text */ |
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const OVERLINE_OFFSET = 0.0; |
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|
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/** Relative to centre of text. */ |
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const LINETHROUGH_OFFSET = 0.0; |
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|
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/** How far to extend lines past either end, in pt */ |
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const DECO_EXTENSION = 0.0; |
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|
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/** |
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* @param \Dompdf\FrameDecorator\Text $frame |
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*/ |
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function render(Frame $frame) |
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{ |
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$style = $frame->get_style(); |
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$text = $frame->get_text(); |
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|
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if (trim($text) === "") { |
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return; |
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} |
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|
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$this->_set_opacity($frame->get_opacity($style->opacity)); |
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|
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list($x, $y) = $frame->get_position(); |
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$cb = $frame->get_containing_block(); |
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|
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$ml = $style->margin_left; |
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$pl = $style->padding_left; |
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$bl = $style->border_left_width; |
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$x += (float) $style->length_in_pt([$ml, $pl, $bl], $cb["w"]); |
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|
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$font = $style->font_family; |
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$size = $style->font_size; |
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$frame_font_size = $frame->get_dompdf()->getFontMetrics()->getFontHeight($font, $size); |
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$word_spacing = $frame->get_text_spacing() + $style->word_spacing; |
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$letter_spacing = $style->letter_spacing; |
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$width = (float) $style->width; |
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|
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/*$text = str_replace( |
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array("{PAGE_NUM}"), |
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array($this->_canvas->get_page_number()), |
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$text |
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);*/ |
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|
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$this->_canvas->text($x, $y, $text, |
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$font, $size, |
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$style->color, $word_spacing, $letter_spacing); |
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|
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$line = $frame->get_containing_line(); |
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|
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// FIXME Instead of using the tallest frame to position, |
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// the decoration, the text should be well placed |
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if (false && $line->tallest_frame) { |
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$base_frame = $line->tallest_frame; |
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$style = $base_frame->get_style(); |
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$size = $style->font_size; |
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} |
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|
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$line_thickness = $size * self::DECO_THICKNESS; |
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$underline_offset = $size * self::UNDERLINE_OFFSET; |
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$overline_offset = $size * self::OVERLINE_OFFSET; |
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$linethrough_offset = $size * self::LINETHROUGH_OFFSET; |
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$underline_position = -0.08; |
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|
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if ($this->_canvas instanceof CPDF) { |
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$cpdf_font = $this->_canvas->get_cpdf()->fonts[$style->font_family]; |
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|
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if (isset($cpdf_font["UnderlinePosition"])) { |
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$underline_position = $cpdf_font["UnderlinePosition"] / 1000; |
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} |
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|
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if (isset($cpdf_font["UnderlineThickness"])) { |
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$line_thickness = $size * ($cpdf_font["UnderlineThickness"] / 1000); |
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} |
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} |
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|
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$descent = $size * $underline_position; |
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$base = $frame_font_size; |
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|
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// Handle text decoration: |
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// http://www.w3.org/TR/CSS21/text.html#propdef-text-decoration |
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|
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// Draw all applicable text-decorations. Start with the root and work our way down. |
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$p = $frame; |
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$stack = []; |
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while ($p = $p->get_parent()) { |
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$stack[] = $p; |
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} |
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|
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while (isset($stack[0])) { |
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$f = array_pop($stack); |
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|
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if (($text_deco = $f->get_style()->text_decoration) === "none") { |
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continue; |
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} |
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|
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$deco_y = $y; //$line->y; |
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$color = $f->get_style()->color; |
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|
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switch ($text_deco) { |
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default: |
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continue 2; |
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|
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case "underline": |
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$deco_y += $base - $descent + $underline_offset + $line_thickness / 2; |
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break; |
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|
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case "overline": |
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$deco_y += $overline_offset + $line_thickness / 2; |
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break; |
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|
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case "line-through": |
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$deco_y += $base * 0.7 + $linethrough_offset; |
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break; |
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} |
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|
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$dx = 0; |
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$x1 = $x - self::DECO_EXTENSION; |
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$x2 = $x + $width + $dx + self::DECO_EXTENSION; |
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$this->_canvas->line($x1, $deco_y, $x2, $deco_y, $color, $line_thickness); |
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} |
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|
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if ($this->_dompdf->getOptions()->getDebugLayout() && $this->_dompdf->getOptions()->getDebugLayoutLines()) { |
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$text_width = $this->_dompdf->getFontMetrics()->getTextWidth($text, $font, $size, $word_spacing, $letter_spacing); |
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$this->_debug_layout([$x, $y, $text_width, $frame_font_size], "orange", [0.5, 0.5]); |
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} |
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} |
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} |
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|
