| 1 |
<?php |
| 2 |
|
| 3 |
/** |
| 4 |
* @package dompdf |
| 5 |
* @link https://github.com/dompdf/dompdf |
| 6 |
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License |
| 7 |
*/ |
| 8 |
namespace WCPOS\Vendor\Dompdf\FrameReflower; |
| 9 |
|
| 10 |
use WCPOS\Vendor\Dompdf\Exception; |
| 11 |
use WCPOS\Vendor\Dompdf\FontMetrics; |
| 12 |
use WCPOS\Vendor\Dompdf\FrameDecorator\Block as BlockFrameDecorator; |
| 13 |
use WCPOS\Vendor\Dompdf\FrameDecorator\Inline as InlineFrameDecorator; |
| 14 |
use WCPOS\Vendor\Dompdf\FrameDecorator\Text as TextFrameDecorator; |
| 15 |
use WCPOS\Vendor\Dompdf\Helpers; |
| 16 |
/** |
| 17 |
* Reflows text frames. |
| 18 |
* |
| 19 |
* @package dompdf |
| 20 |
*/ |
| 21 |
class Text extends AbstractFrameReflower |
| 22 |
{ |
| 23 |
/** |
| 24 |
* PHP string representation of HTML entity <shy> |
| 25 |
*/ |
| 26 |
const SOFT_HYPHEN = ""; |
| 27 |
/** |
| 28 |
* The regex splits on everything that's a separator (^\S double negative), |
| 29 |
* excluding the following non-breaking space characters: |
| 30 |
* * nbsp (\xA0) |
| 31 |
* * narrow nbsp (\x{202F}) |
| 32 |
* * figure space (\x{2007}) |
| 33 |
*/ |
| 34 |
public static $_whitespace_pattern = '/([^\\S\\xA0\\x{202F}\\x{2007}]+)/u'; |
| 35 |
/** |
| 36 |
* The regex splits on everything that's a separator (^\S double negative) |
| 37 |
* plus dashes, excluding the following non-breaking space characters: |
| 38 |
* * nbsp (\xA0) |
| 39 |
* * narrow nbsp (\x{202F}) |
| 40 |
* * figure space (\x{2007}) |
| 41 |
*/ |
| 42 |
public static $_wordbreak_pattern = '/([^\\S\\xA0\\x{202F}\\x{2007}\\n]+|\\R|\\-+|\\xAD+)/u'; |
| 43 |
/** |
| 44 |
* Frame for this reflower |
| 45 |
* |
| 46 |
* @var TextFrameDecorator |
| 47 |
*/ |
| 48 |
protected $_frame; |
| 49 |
/** |
| 50 |
* @var FontMetrics |
| 51 |
*/ |
| 52 |
private $fontMetrics; |
| 53 |
/** |
| 54 |
* @param TextFrameDecorator $frame |
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* @param FontMetrics $fontMetrics |
| 56 |
*/ |
| 57 |
public function __construct(TextFrameDecorator $frame, FontMetrics $fontMetrics) |
| 58 |
{ |
| 59 |
parent::__construct($frame); |
| 60 |
$this->setFontMetrics($fontMetrics); |
| 61 |
} |
| 62 |
/** |
| 63 |
* Apply text transform and white-space collapse according to style. |
| 64 |
* |
| 65 |
* * http://www.w3.org/TR/CSS21/text.html#propdef-text-transform |
| 66 |
* * http://www.w3.org/TR/CSS21/text.html#propdef-white-space |
| 67 |
* |
| 68 |
* @param string $text |
| 69 |
* @return string |
| 70 |
*/ |
| 71 |
protected function pre_process_text(string $text) : string |
| 72 |
{ |
| 73 |
$style = $this->_frame->get_style(); |
| 74 |
// Handle text transform |
| 75 |
switch ($style->text_transform) { |
| 76 |
case "capitalize": |
| 77 |
$text = Helpers::mb_ucwords($text); |
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break; |
| 79 |
case "uppercase": |
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$text = \mb_convert_case($text, \MB_CASE_UPPER, "UTF-8"); |
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break; |
| 82 |
case "lowercase": |
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$text = \mb_convert_case($text, \MB_CASE_LOWER, "UTF-8"); |
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break; |
| 85 |
default: |
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break; |
| 87 |
} |
| 88 |
// Handle white-space collapse |
| 89 |
switch ($style->white_space) { |
| 90 |
default: |
| 91 |
case "normal": |
| 92 |
case "nowrap": |
| 93 |
$text = \preg_replace(self::$_whitespace_pattern, " ", $text) ?? ""; |
| 94 |
break; |
| 95 |
case "pre-line": |
| 96 |
// Collapse white space except for line breaks |
| 97 |
$text = \preg_replace('/([^\\S\\xA0\\x{202F}\\x{2007}\\n]+)/u', " ", $text) ?? ""; |
| 98 |
break; |
| 99 |
case "pre": |
| 100 |
case "pre-wrap": |
| 101 |
break; |
| 102 |
} |
| 103 |
return $text; |
| 104 |
} |
| 105 |
/** |
| 106 |
* @param string $text |
| 107 |
* @param BlockFrameDecorator $block |
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* @param bool $nowrap |
| 109 |
* |
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* @return int|false |
| 111 |
*/ |
| 112 |
protected function line_break(string $text, BlockFrameDecorator $block, bool $nowrap = \false) |
| 113 |
{ |
| 114 |
$fontMetrics = $this->getFontMetrics(); |
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$frame = $this->_frame; |
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$style = $frame->get_style(); |
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$font = $style->font_family; |
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$size = $style->font_size; |
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$word_spacing = $style->word_spacing; |
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$letter_spacing = $style->letter_spacing; |
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// Determine the available width |
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$current_line = $block->get_current_line_box(); |
| 123 |
$line_width = $frame->get_containing_block("w"); |
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$current_line_width = $current_line->left + $current_line->w + $current_line->right; |
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$available_width = $line_width - $current_line_width; |
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// Determine the frame width including margin, padding & border |
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$visible_text = \preg_replace('/\\xAD/u', "", $text); |
| 128 |
$text_width = $fontMetrics->getTextWidth($visible_text, $font, $size, $word_spacing, $letter_spacing); |
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$mbp_width = (float) $style->length_in_pt([$style->margin_left, $style->border_left_width, $style->padding_left, $style->padding_right, $style->border_right_width, $style->margin_right], $line_width); |
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$frame_width = $text_width + $mbp_width; |
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if (Helpers::lengthLessOrEqual($frame_width, $available_width)) { |
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return \false; |
| 133 |
} |
| 134 |
$force_first = $current_line->left == 0 && $current_line->right == 0 && $current_line->is_empty(); |
| 135 |
if ($nowrap) { |
| 136 |
return $force_first ? \false : 0; |
| 137 |
} |
| 138 |
// Split the text into words |
| 139 |
$words = \preg_split(self::$_wordbreak_pattern, $text, -1, \PREG_SPLIT_DELIM_CAPTURE); |
| 140 |
$wc = \count($words); |
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// Determine the split point |
| 142 |
$width = 0.0; |
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$str = ""; |
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$space_width = $fontMetrics->getTextWidth(" ", $font, $size, $word_spacing, $letter_spacing); |
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$shy_width = $fontMetrics->getTextWidth(self::SOFT_HYPHEN, $font, $size); |
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// @todo support <wbr> |
| 147 |
for ($i = 0; $i < $wc; $i += 2) { |
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// Allow trailing white space to overflow. White space is always |
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// collapsed to the standard space character currently, so only |
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// handle that for now |
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$sep = $words[$i + 1] ?? ""; |
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$word = $sep === " " ? $words[$i] : $words[$i] . $sep; |
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$word_width = $fontMetrics->getTextWidth($word, $font, $size, $word_spacing, $letter_spacing); |
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$used_width = $width + $word_width + $mbp_width; |
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if ($used_width > 0 && Helpers::lengthGreater($used_width, $available_width)) { |
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// If the previous split happened by soft hyphen, we have to |
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// append its width again because the last hyphen of a line |
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// won't be removed |
| 159 |
if (isset($words[$i - 1]) && self::SOFT_HYPHEN === $words[$i - 1]) { |
| 160 |
$width += $shy_width; |
| 161 |
} |
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break; |
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} |
| 164 |
// If the word is splitted by soft hyphen, but no line break is needed |
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// we have to reduce the width. But the str is not modified, otherwise |
| 166 |
// the wrong offset is calculated at the end of this method. |
| 167 |
if ($sep === self::SOFT_HYPHEN) { |
| 168 |
$width += $word_width - $shy_width; |
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$str .= $word; |
| 170 |
} elseif ($sep === " ") { |
| 171 |
$width += $word_width + $space_width; |
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$str .= $word . $sep; |
| 173 |
} else { |
| 174 |
$width += $word_width; |
| 175 |
$str .= $word; |
| 176 |
} |
| 177 |
} |
| 178 |
// The first word has overflowed. Force it onto the line, or as many |
| 179 |
// characters as fit if breaking words is allowed |
| 180 |
if ($force_first && $width === 0.0) { |
| 181 |
if ($sep === " ") { |
| 182 |
$word .= $sep; |
| 183 |
} |
| 184 |
// https://www.w3.org/TR/css-text-3/#overflow-wrap-property |
| 185 |
$wrap = $style->overflow_wrap; |
| 186 |
$break_word = $wrap === "anywhere" || $wrap === "break-word"; |
| 187 |
if ($break_word) { |
| 188 |
$s = ""; |
| 189 |
$len = \mb_strlen($word, "UTF-8"); |
| 190 |
for ($j = 0; $j < $len; $j++) { |
| 191 |
$c = \mb_substr($word, $j, 1, "UTF-8"); |
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$w = $fontMetrics->getTextWidth($s . $c, $font, $size, $word_spacing, $letter_spacing); |
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if (Helpers::lengthGreater($w, $available_width)) { |
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break; |
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} |
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$s .= $c; |
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} |
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// Always force the first character onto the line |
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$str = $j === 0 ? $s . $c : $s; |
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} else { |
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$str = $word; |
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} |
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} |
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$offset = \mb_strlen($str, "UTF-8"); |
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return $offset; |
| 206 |
} |
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/** |
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* @param string $text |
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* @return int|false |
| 210 |
*/ |
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protected function newline_break(string $text) |
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{ |
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if (($i = \mb_strpos($text, "\n", 0, "UTF-8")) === \false) { |
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return \false; |
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} |
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return $i + 1; |
| 217 |
} |
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/** |
| 219 |
* @param BlockFrameDecorator $block |
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* @return bool|null Whether to add a new line at the end. `null` if reflow |
| 221 |
* should be stopped. |
| 222 |
*/ |
| 223 |
protected function layout_line(BlockFrameDecorator $block) : ?bool |
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{ |
| 225 |
$frame = $this->_frame; |
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$style = $frame->get_style(); |
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$current_line = $block->get_current_line_box(); |
| 228 |
$text = $frame->get_text(); |
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// Trim leading white space if this is the first text on the line |
| 230 |
if ($current_line->is_empty() && !$frame->is_pre()) { |
| 231 |
$text = \ltrim($text, " "); |
| 232 |
} |
| 233 |
if ($text === "") { |
| 234 |
$frame->set_text(""); |
| 235 |
$style->set_used("width", 0.0); |
| 236 |
return \false; |
| 237 |
} |
| 238 |
// Determine the next line break |
| 239 |
// http://www.w3.org/TR/CSS21/text.html#propdef-white-space |
| 240 |
$white_space = $style->white_space; |
| 241 |
$nowrap = $white_space === "nowrap" || $white_space === "pre"; |
| 242 |
switch ($white_space) { |
| 243 |
default: |
| 244 |
case "normal": |
| 245 |
case "nowrap": |
| 246 |
$split = $this->line_break($text, $block, $nowrap); |
| 247 |
$add_line = \false; |
| 248 |
break; |
| 249 |
case "pre": |
| 250 |
case "pre-line": |
| 251 |
case "pre-wrap": |
| 252 |
$hard_split = $this->newline_break($text); |
| 253 |
$first_line = $hard_split !== \false ? \mb_substr($text, 0, $hard_split, "UTF-8") : $text; |
| 254 |
$soft_split = $this->line_break($first_line, $block, $nowrap); |
| 255 |
$split = $soft_split !== \false ? $soft_split : $hard_split; |
| 256 |
$add_line = $hard_split !== \false; |
| 257 |
break; |
| 258 |
} |
| 259 |
if ($split === 0) { |
| 260 |
// Make sure to move text when floating frames leave no space to |
| 261 |
// place anything onto the line |
| 262 |
// TODO: Would probably be better to move just below the current |
| 263 |
// floating frame instead of trying to place text in line-height |
| 264 |
// increments |
| 265 |
if ($current_line->h === 0.0) { |
| 266 |
// Line height might be 0 |
| 267 |
$h = \max($frame->get_margin_height(), 1.0); |
| 268 |
$block->maximize_line_height($h, $frame); |
| 269 |
} |
| 270 |
// Break line and repeat layout |
| 271 |
$block->add_line(); |
| 272 |
// Find the appropriate inline ancestor to split |
| 273 |
$child = $frame; |
| 274 |
$p = $child->get_parent(); |
| 275 |
while ($p instanceof InlineFrameDecorator && !$child->get_prev_sibling()) { |
| 276 |
$child = $p; |
| 277 |
$p = $p->get_parent(); |
| 278 |
} |
| 279 |
if ($p instanceof InlineFrameDecorator) { |
| 280 |
// Split parent and stop current reflow. Reflow continues |
| 281 |
// via child-reflow loop of split parent |
| 282 |
$p->split($child); |
| 283 |
return null; |
| 284 |
} |
| 285 |
return $this->layout_line($block); |
| 286 |
} |
| 287 |
// Final split point is determined |
| 288 |
if ($split !== \false && $split < \mb_strlen($text, "UTF-8")) { |
| 289 |
// Split the line |
| 290 |
$frame->set_text($text); |
| 291 |
$frame->split_text($split, \true); |
| 292 |
$add_line = \true; |
| 293 |
// Remove inner soft hyphens |
| 294 |
$t = $frame->get_text(); |
| 295 |
$shyPosition = \mb_strpos($t, self::SOFT_HYPHEN, 0, "UTF-8"); |
| 296 |
if (\false !== $shyPosition && $shyPosition < \mb_strlen($t, "UTF-8") - 1) { |
| 297 |
$t = \str_replace(self::SOFT_HYPHEN, "", \mb_substr($t, 0, -1, "UTF-8")) . \mb_substr($t, -1, null, "UTF-8"); |
| 298 |
$frame->set_text($t); |
| 299 |
} |
| 300 |
} else { |
| 301 |
// No split required |
| 302 |
// Remove soft hyphens |
| 303 |
$text = \str_replace(self::SOFT_HYPHEN, "", $text); |
| 304 |
$frame->set_text($text); |
| 305 |
} |
| 306 |
// Set our new width |
| 307 |
$frame->recalculate_width(); |
| 308 |
return $add_line; |
| 309 |
} |
| 310 |
/** |
| 311 |
* @param BlockFrameDecorator|null $block |
| 312 |
* @throws Exception |
| 313 |
*/ |
| 314 |
function reflow(?BlockFrameDecorator $block = null) |
| 315 |
{ |
| 316 |
$frame = $this->_frame; |
| 317 |
$page = $frame->get_root(); |
| 318 |
$page->check_forced_page_break($frame); |
| 319 |
if ($page->is_full()) { |
| 320 |
return; |
| 321 |
} |
| 322 |
$style = $frame->get_style(); |
| 323 |
// Handle text transform and white space |
| 324 |
$frame->set_text($this->pre_process_text($frame->get_text())); |
| 325 |
// map text to fonts based on supported Unicode range |
| 326 |
$frame->apply_font_mapping(); |
| 327 |
$text = $frame->get_text(); |
| 328 |
// Determine the text height |
| 329 |
$size = $style->font_size; |
| 330 |
$font = $style->font_family; |
| 331 |
$font_height = $this->getFontMetrics()->getFontHeight($font, $size); |
| 332 |
$style->set_used("height", $font_height); |
| 333 |
if ($block === null) { |
| 334 |
return; |
| 335 |
} |
| 336 |
$add_line = $this->layout_line($block); |
| 337 |
if ($add_line === null) { |
| 338 |
return; |
| 339 |
} |
| 340 |
$frame->position(); |
| 341 |
// Skip wrapped white space between block-level elements in case white |
| 342 |
// space is collapsed |
| 343 |
$text = $frame->get_text(); |
| 344 |
if ($text === "" && $frame->get_margin_width() === 0.0) { |
| 345 |
return; |
| 346 |
} |
| 347 |
$line = $block->add_frame_to_line($frame); |
| 348 |
$trimmed = \trim($text); |
| 349 |
// Split the text into words (used to determine spacing between |
| 350 |
// words on justified lines) |
| 351 |
if ($trimmed !== "") { |
| 352 |
$words = \preg_split(self::$_whitespace_pattern, $trimmed); |
| 353 |
$line->wc += \count($words); |
| 354 |
} |
| 355 |
if ($add_line) { |
| 356 |
$block->add_line(); |
| 357 |
} |
| 358 |
} |
| 359 |
/** |
| 360 |
* Trim trailing white space from the frame text. |
| 361 |
*/ |
| 362 |
public function trim_trailing_ws() : void |
| 363 |
{ |
| 364 |
$this->_frame->trim_trailing_ws(); |
| 365 |
} |
| 366 |
public function reset() : void |
| 367 |
{ |
| 368 |
parent::reset(); |
| 369 |
} |
| 370 |
//........................................................................ |
| 371 |
public function get_min_max_width() : array |
| 372 |
{ |
| 373 |
$fontMetrics = $this->getFontMetrics(); |
| 374 |
$frame = $this->_frame; |
| 375 |
$style = $frame->get_style(); |
| 376 |
// Handle text transform and white space |
| 377 |
$frame->set_text($this->pre_process_text($frame->get_text())); |
| 378 |
// map text to fonts based on supported Unicode range |
| 379 |
$frame->apply_font_mapping(); |
| 380 |
$text = $frame->get_text(); |
| 381 |
$font = $style->font_family; |
| 382 |
$size = $style->font_size; |
| 383 |
$word_spacing = $style->word_spacing; |
| 384 |
$letter_spacing = $style->letter_spacing; |
| 385 |
if (!$frame->is_pre()) { |
| 386 |
// Determine whether the frame is at the start of its parent block. |
| 387 |
// Trim leading white space in that case |
| 388 |
$child = $frame; |
| 389 |
$p = $frame->get_parent(); |
| 390 |
while (!$p->is_block() && !$child->get_prev_sibling()) { |
| 391 |
$child = $p; |
| 392 |
$p = $p->get_parent(); |
| 393 |
} |
| 394 |
if (!$child->get_prev_sibling()) { |
| 395 |
$text = \ltrim($text, " "); |
| 396 |
} |
| 397 |
// Determine whether the frame is at the end of its parent block. |
| 398 |
// Trim trailing white space in that case |
| 399 |
$child = $frame; |
| 400 |
$p = $frame->get_parent(); |
| 401 |
while (!$p->is_block() && !$child->get_next_sibling()) { |
| 402 |
$child = $p; |
| 403 |
$p = $p->get_parent(); |
| 404 |
} |
| 405 |
if (!$child->get_next_sibling()) { |
| 406 |
$text = \rtrim($text, " "); |
| 407 |
} |
| 408 |
} |
| 409 |
// Strip soft hyphens for max-line-width calculations |
| 410 |
$visible_text = \preg_replace('/\\xAD/u', "", $text); |
| 411 |
// Determine minimum text width |
| 412 |
switch ($style->white_space) { |
| 413 |
default: |
| 414 |
case "normal": |
| 415 |
case "pre-line": |
| 416 |
case "pre-wrap": |
| 417 |
// The min width is the longest word or, if breaking words is |
| 418 |
// allowed with the `anywhere` keyword, the widest character. |
| 419 |
// For performance reasons, we only check the first character in |
| 420 |
// the latter case. |
| 421 |
// https://www.w3.org/TR/css-text-3/#overflow-wrap-property |
| 422 |
if ($style->overflow_wrap === "anywhere") { |
| 423 |
$char = \mb_substr($visible_text, 0, 1, "UTF-8"); |
| 424 |
$min = $fontMetrics->getTextWidth($char, $font, $size, $word_spacing, $letter_spacing); |
| 425 |
} else { |
| 426 |
// Find the longest word |
| 427 |
$words = \preg_split(self::$_wordbreak_pattern, $text, -1, \PREG_SPLIT_DELIM_CAPTURE); |
| 428 |
$lengths = \array_map(function ($chunk) use($fontMetrics, $font, $size, $word_spacing, $letter_spacing) { |
| 429 |
// Allow trailing white space to overflow. As in actual |
| 430 |
// layout above, only handle a single space for now |
| 431 |
$sep = $chunk[1] ?? ""; |
| 432 |
$word = $sep === " " ? $chunk[0] : $chunk[0] . $sep; |
| 433 |
return $fontMetrics->getTextWidth($word, $font, $size, $word_spacing, $letter_spacing); |
| 434 |
}, \array_chunk($words, 2)); |
| 435 |
$min = \max($lengths); |
| 436 |
} |
| 437 |
break; |
| 438 |
case "pre": |
| 439 |
// Find the longest line |
| 440 |
$lines = \array_flip(\preg_split("/\\R/u", $visible_text)); |
| 441 |
\array_walk($lines, function (&$chunked_text_width, $chunked_text) use($fontMetrics, $font, $size, $word_spacing, $letter_spacing) { |
| 442 |
$chunked_text_width = $fontMetrics->getTextWidth($chunked_text, $font, $size, $word_spacing, $letter_spacing); |
| 443 |
}); |
| 444 |
\arsort($lines); |
| 445 |
$min = \reset($lines); |
| 446 |
break; |
| 447 |
case "nowrap": |
| 448 |
$min = $fontMetrics->getTextWidth($visible_text, $font, $size, $word_spacing, $letter_spacing); |
| 449 |
break; |
| 450 |
} |
| 451 |
// Determine maximum text width |
| 452 |
switch ($style->white_space) { |
| 453 |
default: |
| 454 |
case "normal": |
| 455 |
$max = $fontMetrics->getTextWidth($visible_text, $font, $size, $word_spacing, $letter_spacing); |
| 456 |
break; |
| 457 |
case "pre-line": |
| 458 |
case "pre-wrap": |
| 459 |
// Find the longest line |
| 460 |
$lines = \array_flip(\preg_split("/\\R/u", $visible_text)); |
| 461 |
\array_walk($lines, function (&$chunked_text_width, $chunked_text) use($fontMetrics, $font, $size, $word_spacing, $letter_spacing) { |
| 462 |
$chunked_text_width = $fontMetrics->getTextWidth($chunked_text, $font, $size, $word_spacing, $letter_spacing); |
| 463 |
}); |
| 464 |
\arsort($lines); |
| 465 |
$max = \reset($lines); |
| 466 |
break; |
| 467 |
case "pre": |
| 468 |
case "nowrap": |
| 469 |
$max = $min; |
| 470 |
break; |
| 471 |
} |
| 472 |
// Account for margins, borders, and padding |
| 473 |
$dims = [$style->padding_left, $style->padding_right, $style->border_left_width, $style->border_right_width, $style->margin_left, $style->margin_right]; |
| 474 |
// The containing block is not defined yet, treat percentages as 0 |
| 475 |
$delta = (float) $style->length_in_pt($dims, 0); |
| 476 |
$min += $delta; |
| 477 |
$max += $delta; |
| 478 |
return [$min, $max, "min" => $min, "max" => $max]; |
| 479 |
} |
| 480 |
/** |
| 481 |
* @param FontMetrics $fontMetrics |
| 482 |
* @return $this |
| 483 |
*/ |
| 484 |
public function setFontMetrics(FontMetrics $fontMetrics) |
| 485 |
{ |
| 486 |
$this->fontMetrics = $fontMetrics; |
| 487 |
return $this; |
| 488 |
} |
| 489 |
/** |
| 490 |
* @return FontMetrics |
| 491 |
*/ |
| 492 |
public function getFontMetrics() |
| 493 |
{ |
| 494 |
return $this->fontMetrics; |
| 495 |
} |
| 496 |
} |
| 497 |
|
