| 1 |
<?php |
| 2 |
/** |
| 3 |
* @package dompdf |
| 4 |
* @link https://github.com/dompdf/dompdf |
| 5 |
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License |
| 6 |
*/ |
| 7 |
namespace Dompdf\FrameReflower; |
| 8 |
|
| 9 |
use Dompdf\FrameDecorator\AbstractFrameDecorator; |
| 10 |
use Dompdf\FrameDecorator\Block as BlockFrameDecorator; |
| 11 |
use Dompdf\FrameDecorator\TableCell as TableCellFrameDecorator; |
| 12 |
use Dompdf\FrameDecorator\Text as TextFrameDecorator; |
| 13 |
use Dompdf\Exception; |
| 14 |
use Dompdf\Css\Style; |
| 15 |
use Dompdf\Helpers; |
| 16 |
|
| 17 |
/** |
| 18 |
* Reflows block frames |
| 19 |
* |
| 20 |
* @package dompdf |
| 21 |
*/ |
| 22 |
class Block extends AbstractFrameReflower |
| 23 |
{ |
| 24 |
// Minimum line width to justify, as fraction of available width |
| 25 |
const MIN_JUSTIFY_WIDTH = 0.80; |
| 26 |
|
| 27 |
/** |
| 28 |
* Frame for this reflower |
| 29 |
* |
| 30 |
* @var BlockFrameDecorator |
| 31 |
*/ |
| 32 |
protected $_frame; |
| 33 |
|
| 34 |
function __construct(BlockFrameDecorator $frame) |
| 35 |
{ |
| 36 |
parent::__construct($frame); |
| 37 |
} |
| 38 |
|
| 39 |
/** |
| 40 |
* Calculate the ideal used value for the width property as per: |
| 41 |
* http://www.w3.org/TR/CSS21/visudet.html#Computing_widths_and_margins |
| 42 |
* |
| 43 |
* @param float $width |
| 44 |
* |
| 45 |
* @return array |
| 46 |
*/ |
| 47 |
protected function _calculate_width($width) |
| 48 |
{ |
| 49 |
$frame = $this->_frame; |
| 50 |
$style = $frame->get_style(); |
| 51 |
$absolute = $frame->is_absolute(); |
| 52 |
|
| 53 |
$cb = $frame->get_containing_block(); |
| 54 |
$w = $cb["w"]; |
| 55 |
|
| 56 |
$rm = $style->length_in_pt($style->margin_right, $w); |
| 57 |
$lm = $style->length_in_pt($style->margin_left, $w); |
| 58 |
|
| 59 |
$left = $style->length_in_pt($style->left, $w); |
| 60 |
$right = $style->length_in_pt($style->right, $w); |
| 61 |
|
| 62 |
// Handle 'auto' values |
| 63 |
$dims = [$style->border_left_width, |
| 64 |
$style->border_right_width, |
| 65 |
$style->padding_left, |
| 66 |
$style->padding_right, |
| 67 |
$width !== "auto" ? $width : 0, |
| 68 |
$rm !== "auto" ? $rm : 0, |
| 69 |
$lm !== "auto" ? $lm : 0]; |
| 70 |
|
| 71 |
// absolutely positioned boxes take the 'left' and 'right' properties into account |
| 72 |
if ($absolute) { |
| 73 |
$dims[] = $left !== "auto" ? $left : 0; |
| 74 |
$dims[] = $right !== "auto" ? $right : 0; |
| 75 |
} |
| 76 |
|
| 77 |
$sum = (float)$style->length_in_pt($dims, $w); |
| 78 |
|
| 79 |
// Compare to the containing block |
| 80 |
$diff = $w - $sum; |
| 81 |
|
| 82 |
if ($absolute) { |
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// Absolutely positioned |
| 84 |
// http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width |
| 85 |
|
| 86 |
if ($width === "auto" || $left === "auto" || $right === "auto") { |
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// "all of the three are 'auto'" logic + otherwise case |
| 88 |
if ($lm === "auto") { |
| 89 |
$lm = 0; |
| 90 |
} |
| 91 |
if ($rm === "auto") { |
| 92 |
$rm = 0; |
| 93 |
} |
| 94 |
|
| 95 |
$block_parent = $frame->find_block_parent(); |
| 96 |
$parent_content = $block_parent->get_content_box(); |
| 97 |
$line = $block_parent->get_current_line_box(); |
| 98 |
|
| 99 |
// TODO: This is the in-flow inline position. Use the in-flow |
| 100 |
// block position if the original display type is block-level |
| 101 |
$inflow_x = $parent_content["x"] - $cb["x"] + $line->left + $line->w; |
| 102 |
|
| 103 |
if ($width === "auto" && $left === "auto" && $right === "auto") { |
| 104 |
// rule 3, per instruction preceding rule set |
| 105 |
// shrink-to-fit width |
| 106 |
$left = $inflow_x; |
| 107 |
[$min, $max] = $this->get_min_max_child_width(); |
| 108 |
$width = min(max($min, $diff - $left), $max); |
| 109 |
$right = $diff - $left - $width; |
| 110 |
} elseif ($width === "auto" && $left === "auto") { |
| 111 |
// rule 1 |
| 112 |
// shrink-to-fit width |
| 113 |
[$min, $max] = $this->get_min_max_child_width(); |
| 114 |
$width = min(max($min, $diff), $max); |
| 115 |
$left = $diff - $width; |
| 116 |
} elseif ($width === "auto" && $right === "auto") { |
| 117 |
// rule 3 |
| 118 |
// shrink-to-fit width |
| 119 |
[$min, $max] = $this->get_min_max_child_width(); |
| 120 |
$width = min(max($min, $diff), $max); |
| 121 |
$right = $diff - $width; |
| 122 |
} elseif ($left === "auto" && $right === "auto") { |
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// rule 2 |
| 124 |
$left = $inflow_x; |
| 125 |
$right = $diff - $left; |
| 126 |
} elseif ($left === "auto") { |
| 127 |
// rule 4 |
| 128 |
$left = $diff; |
| 129 |
} elseif ($width === "auto") { |
| 130 |
// rule 5 |
| 131 |
$width = max($diff, 0); |
| 132 |
} else { |
| 133 |
// $right === "auto" |
| 134 |
// rule 6 |
| 135 |
$right = $diff; |
| 136 |
} |
| 137 |
} else { |
| 138 |
// "none of the three are 'auto'" logic described in paragraph preceding the rules |
| 139 |
if ($diff >= 0) { |
| 140 |
if ($lm === "auto" && $rm === "auto") { |
| 141 |
$lm = $rm = $diff / 2; |
| 142 |
} elseif ($lm === "auto") { |
| 143 |
$lm = $diff; |
| 144 |
} elseif ($rm === "auto") { |
| 145 |
$rm = $diff; |
| 146 |
} |
| 147 |
} else { |
| 148 |
// over-constrained, solve for right |
| 149 |
$right = $right + $diff; |
| 150 |
|
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if ($lm === "auto") { |
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$lm = 0; |
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} |
| 154 |
if ($rm === "auto") { |
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$rm = 0; |
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} |
| 157 |
} |
| 158 |
} |
| 159 |
} elseif ($style->float !== "none" || $style->display === "inline-block") { |
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// Shrink-to-fit width for float and inline block |
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// https://www.w3.org/TR/CSS21/visudet.html#float-width |
| 162 |
// https://www.w3.org/TR/CSS21/visudet.html#inlineblock-width |
| 163 |
|
| 164 |
if ($width === "auto") { |
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[$min, $max] = $this->get_min_max_child_width(); |
| 166 |
$width = min(max($min, $diff), $max); |
| 167 |
} |
| 168 |
if ($lm === "auto") { |
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$lm = 0; |
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} |
| 171 |
if ($rm === "auto") { |
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$rm = 0; |
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} |
| 174 |
} else { |
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// Block-level, normal flow |
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// https://www.w3.org/TR/CSS21/visudet.html#blockwidth |
| 177 |
|
| 178 |
if ($diff >= 0) { |
| 179 |
// Find auto properties and get them to take up the slack |
| 180 |
if ($width === "auto") { |
| 181 |
$width = $diff; |
| 182 |
|
| 183 |
if ($lm === "auto") { |
| 184 |
$lm = 0; |
| 185 |
} |
| 186 |
if ($rm === "auto") { |
| 187 |
$rm = 0; |
| 188 |
} |
| 189 |
} elseif ($lm === "auto" && $rm === "auto") { |
| 190 |
$lm = $rm = $diff / 2; |
| 191 |
} elseif ($lm === "auto") { |
| 192 |
$lm = $diff; |
| 193 |
} elseif ($rm === "auto") { |
| 194 |
$rm = $diff; |
| 195 |
} |
| 196 |
} else { |
| 197 |
// We are over constrained--set margin-right to the difference |
| 198 |
$rm = (float) $rm + $diff; |
| 199 |
|
| 200 |
if ($width === "auto") { |
| 201 |
$width = 0; |
| 202 |
} |
| 203 |
if ($lm === "auto") { |
| 204 |
$lm = 0; |
| 205 |
} |
| 206 |
} |
| 207 |
} |
| 208 |
|
| 209 |
return [ |
| 210 |
"width" => $width, |
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"margin_left" => $lm, |
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"margin_right" => $rm, |
| 213 |
"left" => $left, |
| 214 |
"right" => $right, |
| 215 |
]; |
| 216 |
} |
| 217 |
|
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/** |
| 219 |
* Call the above function, but resolve max/min widths |
| 220 |
* |
| 221 |
* @throws Exception |
| 222 |
* @return array |
| 223 |
*/ |
| 224 |
protected function _calculate_restricted_width() |
| 225 |
{ |
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$frame = $this->_frame; |
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$style = $frame->get_style(); |
| 228 |
$cb = $frame->get_containing_block(); |
| 229 |
|
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if (!isset($cb["w"])) { |
| 231 |
throw new Exception("Box property calculation requires containing block width"); |
| 232 |
} |
| 233 |
|
| 234 |
$width = $style->length_in_pt($style->width, $cb["w"]); |
| 235 |
|
| 236 |
$values = $this->_calculate_width($width); |
| 237 |
$margin_left = $values["margin_left"]; |
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$margin_right = $values["margin_right"]; |
| 239 |
$width = $values["width"]; |
| 240 |
$left = $values["left"]; |
| 241 |
$right = $values["right"]; |
| 242 |
|
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// Handle min/max width |
| 244 |
// https://www.w3.org/TR/CSS21/visudet.html#min-max-widths |
| 245 |
$min_width = $this->resolve_min_width($cb["w"]); |
| 246 |
$max_width = $this->resolve_max_width($cb["w"]); |
| 247 |
|
| 248 |
if ($width > $max_width) { |
| 249 |
$values = $this->_calculate_width($max_width); |
| 250 |
$margin_left = $values["margin_left"]; |
| 251 |
$margin_right = $values["margin_right"]; |
| 252 |
$width = $values["width"]; |
| 253 |
$left = $values["left"]; |
| 254 |
$right = $values["right"]; |
| 255 |
} |
| 256 |
|
| 257 |
if ($width < $min_width) { |
| 258 |
$values = $this->_calculate_width($min_width); |
| 259 |
$margin_left = $values["margin_left"]; |
| 260 |
$margin_right = $values["margin_right"]; |
| 261 |
$width = $values["width"]; |
| 262 |
$left = $values["left"]; |
| 263 |
$right = $values["right"]; |
| 264 |
} |
| 265 |
|
| 266 |
return [$width, $margin_left, $margin_right, $left, $right]; |
| 267 |
} |
| 268 |
|
| 269 |
/** |
| 270 |
* Determine the unrestricted height of content within the block |
| 271 |
* not by adding each line's height, but by getting the last line's position. |
| 272 |
* This because lines could have been pushed lower by a clearing element. |
| 273 |
* |
| 274 |
* @return float |
| 275 |
*/ |
| 276 |
protected function _calculate_content_height(): float |
| 277 |
{ |
| 278 |
$height = 0.0; |
| 279 |
$lines = $this->_frame->get_line_boxes(); |
| 280 |
if (count($lines) > 0) { |
| 281 |
$last_line = end($lines); |
| 282 |
$content_box = $this->_frame->get_content_box(); |
| 283 |
$height = $last_line->y + $last_line->h - $content_box["y"]; |
| 284 |
} |
| 285 |
return $height; |
| 286 |
} |
| 287 |
|
| 288 |
/** |
| 289 |
* Determine the frame's restricted height |
| 290 |
* |
| 291 |
* @return array |
| 292 |
*/ |
| 293 |
protected function _calculate_restricted_height() |
| 294 |
{ |
| 295 |
$frame = $this->_frame; |
| 296 |
$style = $frame->get_style(); |
| 297 |
$content_height = $this->_calculate_content_height(); |
| 298 |
$cb = $frame->get_containing_block(); |
| 299 |
|
| 300 |
$height = $style->length_in_pt($style->height, $cb["h"]); |
| 301 |
$margin_top = $style->length_in_pt($style->margin_top, $cb["w"]); |
| 302 |
$margin_bottom = $style->length_in_pt($style->margin_bottom, $cb["w"]); |
| 303 |
|
| 304 |
$top = $style->length_in_pt($style->top, $cb["h"]); |
| 305 |
$bottom = $style->length_in_pt($style->bottom, $cb["h"]); |
| 306 |
|
| 307 |
if ($frame->is_absolute()) { |
| 308 |
// Absolutely positioned |
| 309 |
// http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-height |
| 310 |
|
| 311 |
$h_dims = [ |
| 312 |
$top !== "auto" ? $top : 0, |
| 313 |
$height !== "auto" ? $height : 0, |
| 314 |
$bottom !== "auto" ? $bottom : 0 |
| 315 |
]; |
| 316 |
$w_dims = [ |
| 317 |
$style->margin_top !== "auto" ? $style->margin_top : 0, |
| 318 |
$style->padding_top, |
| 319 |
$style->border_top_width, |
| 320 |
$style->border_bottom_width, |
| 321 |
$style->padding_bottom, |
| 322 |
$style->margin_bottom !== "auto" ? $style->margin_bottom : 0 |
| 323 |
]; |
| 324 |
|
| 325 |
$sum = (float)$style->length_in_pt($h_dims, $cb["h"]) |
| 326 |
+ (float)$style->length_in_pt($w_dims, $cb["w"]); |
| 327 |
|
| 328 |
$diff = $cb["h"] - $sum; |
| 329 |
|
| 330 |
if ($height === "auto" || $top === "auto" || $bottom === "auto") { |
| 331 |
// "all of the three are 'auto'" logic + otherwise case |
| 332 |
if ($margin_top === "auto") { |
| 333 |
$margin_top = 0; |
| 334 |
} |
| 335 |
if ($margin_bottom === "auto") { |
| 336 |
$margin_bottom = 0; |
| 337 |
} |
| 338 |
|
| 339 |
$block_parent = $frame->find_block_parent(); |
| 340 |
$current_line = $block_parent->get_current_line_box(); |
| 341 |
|
| 342 |
// TODO: This is the in-flow inline position. Use the in-flow |
| 343 |
// block position if the original display type is block-level |
| 344 |
$inflow_y = $current_line->y - $cb["y"]; |
| 345 |
|
| 346 |
if ($height === "auto" && $top === "auto" && $bottom === "auto") { |
| 347 |
// rule 3, per instruction preceding rule set |
| 348 |
$top = $inflow_y; |
| 349 |
$height = $content_height; |
| 350 |
$bottom = $diff - $top - $height; |
| 351 |
} elseif ($height === "auto" && $top === "auto") { |
| 352 |
// rule 1 |
| 353 |
$height = $content_height; |
| 354 |
$top = $diff - $height; |
| 355 |
} elseif ($height === "auto" && $bottom === "auto") { |
| 356 |
// rule 3 |
| 357 |
$height = $content_height; |
| 358 |
$bottom = $diff - $height; |
| 359 |
} elseif ($top === "auto" && $bottom === "auto") { |
| 360 |
// rule 2 |
| 361 |
$top = $inflow_y; |
| 362 |
$bottom = $diff - $top; |
| 363 |
} elseif ($top === "auto") { |
| 364 |
// rule 4 |
| 365 |
$top = $diff; |
| 366 |
} elseif ($height === "auto") { |
| 367 |
// rule 5 |
| 368 |
$height = max($diff, 0); |
| 369 |
} else { |
| 370 |
// $bottom === "auto" |
| 371 |
// rule 6 |
| 372 |
$bottom = $diff; |
| 373 |
} |
| 374 |
} else { |
| 375 |
// "none of the three are 'auto'" logic described in paragraph preceding the rules |
| 376 |
if ($diff >= 0) { |
| 377 |
if ($margin_top === "auto" && $margin_bottom === "auto") { |
| 378 |
$margin_top = $margin_bottom = $diff / 2; |
| 379 |
} elseif ($margin_top === "auto") { |
| 380 |
$margin_top = $diff; |
| 381 |
} elseif ($margin_bottom === "auto") { |
| 382 |
$margin_bottom = $diff; |
| 383 |
} |
| 384 |
} else { |
| 385 |
// over-constrained, solve for bottom |
| 386 |
$bottom = $bottom + $diff; |
| 387 |
|
| 388 |
if ($margin_top === "auto") { |
| 389 |
$margin_top = 0; |
| 390 |
} |
| 391 |
if ($margin_bottom === "auto") { |
| 392 |
$margin_bottom = 0; |
| 393 |
} |
| 394 |
} |
| 395 |
} |
| 396 |
} else { |
| 397 |
// https://www.w3.org/TR/CSS21/visudet.html#normal-block |
| 398 |
// https://www.w3.org/TR/CSS21/visudet.html#block-root-margin |
| 399 |
|
| 400 |
if ($height === "auto") { |
| 401 |
$height = $content_height; |
| 402 |
} |
| 403 |
if ($margin_top === "auto") { |
| 404 |
$margin_top = 0; |
| 405 |
} |
| 406 |
if ($margin_bottom === "auto") { |
| 407 |
$margin_bottom = 0; |
| 408 |
} |
| 409 |
|
| 410 |
// Handle min/max height |
| 411 |
// https://www.w3.org/TR/CSS21/visudet.html#min-max-heights |
| 412 |
$min_height = $this->resolve_min_height($cb["h"]); |
| 413 |
$max_height = $this->resolve_max_height($cb["h"]); |
| 414 |
$height = Helpers::clamp($height, $min_height, $max_height); |
| 415 |
} |
| 416 |
|
| 417 |
// TODO: Need to also take min/max height into account for absolute |
| 418 |
// positioning, using similar logic to the `_calculate_width`/ |
| 419 |
// `calculate_restricted_width` split above. The non-absolute case |
| 420 |
// can simply clamp height within min/max, as margins and offsets are |
| 421 |
// not affected |
| 422 |
|
| 423 |
return [$height, $margin_top, $margin_bottom, $top, $bottom]; |
| 424 |
} |
| 425 |
|
| 426 |
/** |
| 427 |
* Adjust the justification of each of our lines. |
| 428 |
* http://www.w3.org/TR/CSS21/text.html#propdef-text-align |
| 429 |
*/ |
| 430 |
protected function _text_align() |
| 431 |
{ |
| 432 |
$style = $this->_frame->get_style(); |
| 433 |
$w = $this->_frame->get_containing_block("w"); |
| 434 |
$width = (float)$style->length_in_pt($style->width, $w); |
| 435 |
$text_indent = (float)$style->length_in_pt($style->text_indent, $w); |
| 436 |
|
| 437 |
switch ($style->text_align) { |
| 438 |
default: |
| 439 |
case "left": |
| 440 |
foreach ($this->_frame->get_line_boxes() as $line) { |
| 441 |
if (!$line->inline) { |
| 442 |
continue; |
| 443 |
} |
| 444 |
|
| 445 |
$line->trim_trailing_ws(); |
| 446 |
|
| 447 |
if ($line->left) { |
| 448 |
foreach ($line->frames_to_align() as $frame) { |
| 449 |
$frame->move($line->left, 0); |
| 450 |
} |
| 451 |
} |
| 452 |
} |
| 453 |
break; |
| 454 |
|
| 455 |
case "right": |
| 456 |
foreach ($this->_frame->get_line_boxes() as $i => $line) { |
| 457 |
if (!$line->inline) { |
| 458 |
continue; |
| 459 |
} |
| 460 |
|
| 461 |
$line->trim_trailing_ws(); |
| 462 |
|
| 463 |
$indent = $i === 0 ? $text_indent : 0; |
| 464 |
$dx = $width - $line->w - $line->right - $indent; |
| 465 |
|
| 466 |
foreach ($line->frames_to_align() as $frame) { |
| 467 |
$frame->move($dx, 0); |
| 468 |
} |
| 469 |
} |
| 470 |
break; |
| 471 |
|
| 472 |
case "justify": |
| 473 |
// We justify all lines except the last one, unless the frame |
| 474 |
// has been split, in which case the actual last line is part of |
| 475 |
// the split-off frame |
| 476 |
$lines = $this->_frame->get_line_boxes(); |
| 477 |
$last_line_index = $this->_frame->is_split ? null : count($lines) - 1; |
| 478 |
|
| 479 |
foreach ($lines as $i => $line) { |
| 480 |
if (!$line->inline) { |
| 481 |
continue; |
| 482 |
} |
| 483 |
|
| 484 |
$line->trim_trailing_ws(); |
| 485 |
|
| 486 |
if ($line->left) { |
| 487 |
foreach ($line->frames_to_align() as $frame) { |
| 488 |
$frame->move($line->left, 0); |
| 489 |
} |
| 490 |
} |
| 491 |
|
| 492 |
if ($line->br || $i === $last_line_index) { |
| 493 |
continue; |
| 494 |
} |
| 495 |
|
| 496 |
$frames = $line->get_frames(); |
| 497 |
$other_frame_count = 0; |
| 498 |
|
| 499 |
foreach ($frames as $frame) { |
| 500 |
if (!($frame instanceof TextFrameDecorator)) { |
| 501 |
$other_frame_count++; |
| 502 |
} |
| 503 |
} |
| 504 |
|
| 505 |
$word_count = $line->wc + $other_frame_count; |
| 506 |
|
| 507 |
// Set the spacing for each child |
| 508 |
if ($word_count > 1) { |
| 509 |
$indent = $i === 0 ? $text_indent : 0; |
| 510 |
$spacing = ($width - $line->get_width() - $indent) / ($word_count - 1); |
| 511 |
} else { |
| 512 |
$spacing = 0; |
| 513 |
} |
| 514 |
|
| 515 |
$dx = 0; |
| 516 |
foreach ($frames as $frame) { |
| 517 |
if ($frame instanceof TextFrameDecorator) { |
| 518 |
$text = $frame->get_text(); |
| 519 |
$spaces = mb_substr_count($text, " "); |
| 520 |
|
| 521 |
$frame->move($dx, 0); |
| 522 |
$frame->set_text_spacing($spacing); |
| 523 |
|
| 524 |
$dx += $spaces * $spacing; |
| 525 |
} else { |
| 526 |
$frame->move($dx, 0); |
| 527 |
} |
| 528 |
} |
| 529 |
|
| 530 |
// The line (should) now occupy the entire width |
| 531 |
$line->w = $width; |
| 532 |
} |
| 533 |
break; |
| 534 |
|
| 535 |
case "center": |
| 536 |
case "centre": |
| 537 |
foreach ($this->_frame->get_line_boxes() as $i => $line) { |
| 538 |
if (!$line->inline) { |
| 539 |
continue; |
| 540 |
} |
| 541 |
|
| 542 |
$line->trim_trailing_ws(); |
| 543 |
|
| 544 |
$indent = $i === 0 ? $text_indent : 0; |
| 545 |
$dx = ($width + $line->left - $line->w - $line->right - $indent) / 2; |
| 546 |
|
| 547 |
foreach ($line->frames_to_align() as $frame) { |
| 548 |
$frame->move($dx, 0); |
| 549 |
} |
| 550 |
} |
| 551 |
break; |
| 552 |
} |
| 553 |
} |
| 554 |
|
| 555 |
/** |
| 556 |
* Align inline children vertically. |
| 557 |
* Aligns each child vertically after each line is reflowed |
| 558 |
*/ |
| 559 |
function vertical_align() |
| 560 |
{ |
| 561 |
$fontMetrics = $this->get_dompdf()->getFontMetrics(); |
| 562 |
|
| 563 |
foreach ($this->_frame->get_line_boxes() as $line) { |
| 564 |
$height = $line->h; |
| 565 |
|
| 566 |
// Move all markers to the top of the line box |
| 567 |
foreach ($line->get_list_markers() as $marker) { |
| 568 |
$x = $marker->get_position("x"); |
| 569 |
$marker->set_position($x, $line->y); |
| 570 |
} |
| 571 |
|
| 572 |
foreach ($line->frames_to_align() as $frame) { |
| 573 |
$style = $frame->get_style(); |
| 574 |
$isInlineBlock = $style->display !== "inline" |
| 575 |
&& $style->display !== "-dompdf-list-bullet"; |
| 576 |
|
| 577 |
$baseline = $fontMetrics->getFontBaseline($style->font_family, $style->font_size); |
| 578 |
$y_offset = 0; |
| 579 |
|
| 580 |
//FIXME: The 0.8 ratio applied to the height is arbitrary (used to accommodate descenders?) |
| 581 |
if ($isInlineBlock) { |
| 582 |
// Workaround: Skip vertical alignment if the frame is the |
| 583 |
// only one one the line, excluding empty text frames, which |
| 584 |
// may be the result of trailing white space |
| 585 |
// FIXME: This special case should be removed once vertical |
| 586 |
// alignment is properly fixed |
| 587 |
$skip = true; |
| 588 |
|
| 589 |
foreach ($line->get_frames() as $other) { |
| 590 |
if ($other !== $frame |
| 591 |
&& !($other->is_text_node() && $other->get_node()->nodeValue === "") |
| 592 |
) { |
| 593 |
$skip = false; |
| 594 |
break; |
| 595 |
} |
| 596 |
} |
| 597 |
|
| 598 |
if ($skip) { |
| 599 |
continue; |
| 600 |
} |
| 601 |
|
| 602 |
$marginHeight = $frame->get_margin_height(); |
| 603 |
$imageHeightDiff = $height * 0.8 - $marginHeight; |
| 604 |
|
| 605 |
$align = $frame->get_style()->vertical_align; |
| 606 |
if (in_array($align, Style::VERTICAL_ALIGN_KEYWORDS, true)) { |
| 607 |
switch ($align) { |
| 608 |
case "middle": |
| 609 |
$y_offset = $imageHeightDiff / 2; |
| 610 |
break; |
| 611 |
|
| 612 |
case "sub": |
| 613 |
$y_offset = 0.3 * $height + $imageHeightDiff; |
| 614 |
break; |
| 615 |
|
| 616 |
case "super": |
| 617 |
$y_offset = -0.2 * $height + $imageHeightDiff; |
| 618 |
break; |
| 619 |
|
| 620 |
case "text-top": // FIXME: this should be the height of the frame minus the height of the text |
| 621 |
$y_offset = $height - $style->line_height; |
| 622 |
break; |
| 623 |
|
| 624 |
case "top": |
| 625 |
break; |
| 626 |
|
| 627 |
case "text-bottom": // FIXME: align bottom of image with the descender? |
| 628 |
case "bottom": |
| 629 |
$y_offset = 0.3 * $height + $imageHeightDiff; |
| 630 |
break; |
| 631 |
|
| 632 |
case "baseline": |
| 633 |
default: |
| 634 |
$y_offset = $imageHeightDiff; |
| 635 |
break; |
| 636 |
} |
| 637 |
} else { |
| 638 |
$y_offset = $baseline - (float)$style->length_in_pt($align, $style->font_size) - $marginHeight; |
| 639 |
} |
| 640 |
} else { |
| 641 |
$parent = $frame->get_parent(); |
| 642 |
if ($parent instanceof TableCellFrameDecorator) { |
| 643 |
$align = "baseline"; |
| 644 |
} else { |
| 645 |
$align = $parent->get_style()->vertical_align; |
| 646 |
} |
| 647 |
if (in_array($align, Style::VERTICAL_ALIGN_KEYWORDS, true)) { |
| 648 |
switch ($align) { |
| 649 |
case "middle": |
| 650 |
$y_offset = ($height * 0.8 - $baseline) / 2; |
| 651 |
break; |
| 652 |
|
| 653 |
case "sub": |
| 654 |
$y_offset = $height * 0.8 - $baseline * 0.5; |
| 655 |
break; |
| 656 |
|
| 657 |
case "super": |
| 658 |
$y_offset = $height * 0.8 - $baseline * 1.4; |
| 659 |
break; |
| 660 |
|
| 661 |
case "text-top": |
| 662 |
case "top": // Not strictly accurate, but good enough for now |
| 663 |
break; |
| 664 |
|
| 665 |
case "text-bottom": |
| 666 |
case "bottom": |
| 667 |
$y_offset = $height * 0.8 - $baseline; |
| 668 |
break; |
| 669 |
|
| 670 |
case "baseline": |
| 671 |
default: |
| 672 |
$y_offset = $height * 0.8 - $baseline; |
| 673 |
break; |
| 674 |
} |
| 675 |
} else { |
| 676 |
$y_offset = $height * 0.8 - $baseline - (float)$style->length_in_pt($align, $style->font_size); |
| 677 |
} |
| 678 |
} |
| 679 |
|
| 680 |
if ($y_offset !== 0) { |
| 681 |
$frame->move(0, $y_offset); |
| 682 |
} |
| 683 |
} |
| 684 |
} |
| 685 |
} |
| 686 |
|
| 687 |
/** |
| 688 |
* @param AbstractFrameDecorator $child |
| 689 |
*/ |
| 690 |
function process_clear(AbstractFrameDecorator $child) |
| 691 |
{ |
| 692 |
$child_style = $child->get_style(); |
| 693 |
$root = $this->_frame->get_root(); |
| 694 |
|
| 695 |
// Handle "clear" |
| 696 |
if ($child_style->clear !== "none") { |
| 697 |
//TODO: this is a WIP for handling clear/float frames that are in between inline frames |
| 698 |
if ($child->get_prev_sibling() !== null) { |
| 699 |
$this->_frame->add_line(); |
| 700 |
} |
| 701 |
if ($child_style->float !== "none" && $child->get_next_sibling()) { |
| 702 |
$this->_frame->set_current_line_number($this->_frame->get_current_line_number() - 1); |
| 703 |
} |
| 704 |
|
| 705 |
$lowest_y = $root->get_lowest_float_offset($child); |
| 706 |
|
| 707 |
// If a float is still applying, we handle it |
| 708 |
if ($lowest_y) { |
| 709 |
if ($child->is_in_flow()) { |
| 710 |
$line_box = $this->_frame->get_current_line_box(); |
| 711 |
$line_box->y = $lowest_y + $child->get_margin_height(); |
| 712 |
$line_box->left = 0; |
| 713 |
$line_box->right = 0; |
| 714 |
} |
| 715 |
|
| 716 |
$child->move(0, $lowest_y - $child->get_position("y")); |
| 717 |
} |
| 718 |
} |
| 719 |
} |
| 720 |
|
| 721 |
/** |
| 722 |
* @param AbstractFrameDecorator $child |
| 723 |
* @param float $cb_x |
| 724 |
* @param float $cb_w |
| 725 |
*/ |
| 726 |
function process_float(AbstractFrameDecorator $child, $cb_x, $cb_w) |
| 727 |
{ |
| 728 |
$child_style = $child->get_style(); |
| 729 |
$root = $this->_frame->get_root(); |
| 730 |
|
| 731 |
// Handle "float" |
| 732 |
if ($child_style->float !== "none") { |
| 733 |
$root->add_floating_frame($child); |
| 734 |
|
| 735 |
// Remove next frame's beginning whitespace |
| 736 |
$next = $child->get_next_sibling(); |
| 737 |
if ($next && $next instanceof TextFrameDecorator) { |
| 738 |
$next->set_text(ltrim($next->get_text())); |
| 739 |
} |
| 740 |
|
| 741 |
$line_box = $this->_frame->get_current_line_box(); |
| 742 |
list($old_x, $old_y) = $child->get_position(); |
| 743 |
|
| 744 |
$float_x = $cb_x; |
| 745 |
$float_y = $old_y; |
| 746 |
$float_w = $child->get_margin_width(); |
| 747 |
|
| 748 |
if ($child_style->clear === "none") { |
| 749 |
switch ($child_style->float) { |
| 750 |
case "left": |
| 751 |
$float_x += $line_box->left; |
| 752 |
break; |
| 753 |
case "right": |
| 754 |
$float_x += ($cb_w - $line_box->right - $float_w); |
| 755 |
break; |
| 756 |
} |
| 757 |
} else { |
| 758 |
if ($child_style->float === "right") { |
| 759 |
$float_x += ($cb_w - $float_w); |
| 760 |
} |
| 761 |
} |
| 762 |
|
| 763 |
if ($cb_w < $float_x + $float_w - $old_x) { |
| 764 |
// TODO handle when floating elements don't fit |
| 765 |
} |
| 766 |
|
| 767 |
$line_box->get_float_offsets(); |
| 768 |
|
| 769 |
if ($child->_float_next_line) { |
| 770 |
$float_y += $line_box->h; |
| 771 |
} |
| 772 |
|
| 773 |
$child->set_position($float_x, $float_y); |
| 774 |
$child->move($float_x - $old_x, $float_y - $old_y, true); |
| 775 |
} |
| 776 |
} |
| 777 |
|
| 778 |
/** |
| 779 |
* @param BlockFrameDecorator|null $block |
| 780 |
*/ |
| 781 |
function reflow(?BlockFrameDecorator $block = null) |
| 782 |
{ |
| 783 |
|
| 784 |
// Check if a page break is forced |
| 785 |
$page = $this->_frame->get_root(); |
| 786 |
$page->check_forced_page_break($this->_frame); |
| 787 |
|
| 788 |
// Bail if the page is full |
| 789 |
if ($page->is_full()) { |
| 790 |
return; |
| 791 |
} |
| 792 |
|
| 793 |
$this->determine_absolute_containing_block(); |
| 794 |
|
| 795 |
// Counters and generated content |
| 796 |
$this->_set_content(); |
| 797 |
|
| 798 |
// Inherit any dangling list markers |
| 799 |
if ($block && $this->_frame->is_in_flow()) { |
| 800 |
$this->_frame->inherit_dangling_markers($block); |
| 801 |
} |
| 802 |
|
| 803 |
// Collapse margins if required |
| 804 |
$this->_collapse_margins(); |
| 805 |
|
| 806 |
$style = $this->_frame->get_style(); |
| 807 |
$cb = $this->_frame->get_containing_block(); |
| 808 |
|
| 809 |
// Determine the constraints imposed by this frame: calculate the width |
| 810 |
// of the content area: |
| 811 |
[$width, $margin_left, $margin_right, $left, $right] = $this->_calculate_restricted_width(); |
| 812 |
|
| 813 |
// Store the calculated properties |
| 814 |
$style->set_used("width", $width); |
| 815 |
$style->set_used("margin_left", $margin_left); |
| 816 |
$style->set_used("margin_right", $margin_right); |
| 817 |
$style->set_used("left", $left); |
| 818 |
$style->set_used("right", $right); |
| 819 |
|
| 820 |
$margin_top = $style->length_in_pt($style->margin_top, $cb["w"]); |
| 821 |
$margin_bottom = $style->length_in_pt($style->margin_bottom, $cb["w"]); |
| 822 |
|
| 823 |
$auto_top = $style->top === "auto"; |
| 824 |
$auto_margin_top = $margin_top === "auto"; |
| 825 |
|
| 826 |
// Update the position |
| 827 |
$this->_frame->position(); |
| 828 |
[$x, $y] = $this->_frame->get_position(); |
| 829 |
|
| 830 |
// Adjust the first line based on the text-indent property |
| 831 |
$indent = (float)$style->length_in_pt($style->text_indent, $cb["w"]); |
| 832 |
$this->_frame->increase_line_width($indent); |
| 833 |
|
| 834 |
// Determine the content edge |
| 835 |
$top = (float)$style->length_in_pt([ |
| 836 |
$margin_top !== "auto" ? $margin_top : 0, |
| 837 |
$style->border_top_width, |
| 838 |
$style->padding_top |
| 839 |
], $cb["w"]); |
| 840 |
$bottom = (float)$style->length_in_pt([ |
| 841 |
$margin_bottom !== "auto" ? $margin_bottom : 0, |
| 842 |
$style->border_bottom_width, |
| 843 |
$style->padding_bottom |
| 844 |
], $cb["w"]); |
| 845 |
|
| 846 |
$cb_x = $x + (float)$margin_left + (float)$style->length_in_pt([$style->border_left_width, |
| 847 |
$style->padding_left], $cb["w"]); |
| 848 |
|
| 849 |
$cb_y = $y + $top; |
| 850 |
|
| 851 |
$height = $style->length_in_pt($style->height, $cb["h"]); |
| 852 |
if ($height === "auto") { |
| 853 |
$height = ($cb["h"] + $cb["y"]) - $bottom - $cb_y; |
| 854 |
} |
| 855 |
|
| 856 |
// Set the y position of the first line in this block |
| 857 |
$line_box = $this->_frame->get_current_line_box(); |
| 858 |
$line_box->y = $cb_y; |
| 859 |
$line_box->get_float_offsets(); |
| 860 |
|
| 861 |
// Set the containing blocks and reflow each child |
| 862 |
foreach ($this->_frame->get_children() as $child) { |
| 863 |
$child->set_containing_block($cb_x, $cb_y, $width, $height); |
| 864 |
$this->process_clear($child); |
| 865 |
$child->reflow($this->_frame); |
| 866 |
|
| 867 |
// Check for a page break before the child |
| 868 |
$page->check_page_break($child); |
| 869 |
|
| 870 |
// Don't add the child to the line if a page break has occurred |
| 871 |
// before it (possibly via a descendant), in which case it has been |
| 872 |
// reset, including its position |
| 873 |
if ($page->is_full() && $child->get_position("x") === null) { |
| 874 |
break; |
| 875 |
} |
| 876 |
|
| 877 |
$this->process_float($child, $cb_x, $width); |
| 878 |
} |
| 879 |
|
| 880 |
// Stop reflow if a page break has occurred before the frame, in which |
| 881 |
// case it has been reset, including its position |
| 882 |
if ($page->is_full() && $this->_frame->get_position("x") === null) { |
| 883 |
return; |
| 884 |
} |
| 885 |
|
| 886 |
// Determine our height |
| 887 |
[$height, $margin_top, $margin_bottom, $top, $bottom] = $this->_calculate_restricted_height(); |
| 888 |
|
| 889 |
$style->set_used("height", $height); |
| 890 |
$style->set_used("margin_top", $margin_top); |
| 891 |
$style->set_used("margin_bottom", $margin_bottom); |
| 892 |
$style->set_used("top", $top); |
| 893 |
$style->set_used("bottom", $bottom); |
| 894 |
|
| 895 |
if ($this->_frame->is_absolute()) { |
| 896 |
if ($auto_top) { |
| 897 |
$this->_frame->move(0, $top); |
| 898 |
} |
| 899 |
if ($auto_margin_top) { |
| 900 |
$this->_frame->move(0, $margin_top, true); |
| 901 |
} |
| 902 |
} |
| 903 |
|
| 904 |
$this->_text_align(); |
| 905 |
$this->vertical_align(); |
| 906 |
|
| 907 |
// Handle relative positioning |
| 908 |
foreach ($this->_frame->get_children() as $child) { |
| 909 |
$this->position_relative($child); |
| 910 |
} |
| 911 |
|
| 912 |
if ($block && $this->_frame->is_in_flow()) { |
| 913 |
$block->add_frame_to_line($this->_frame); |
| 914 |
|
| 915 |
if ($this->_frame->is_block_level()) { |
| 916 |
$block->add_line(); |
| 917 |
} |
| 918 |
} |
| 919 |
} |
| 920 |
|
| 921 |
public function get_min_max_content_width(): array |
| 922 |
{ |
| 923 |
// TODO: While the containing block is not set yet on the frame, it can |
| 924 |
// already be determined in some cases due to fixed dimensions on the |
| 925 |
// ancestor forming the containing block. In such cases, percentage |
| 926 |
// values could be resolved here |
| 927 |
$style = $this->_frame->get_style(); |
| 928 |
$width = $style->width; |
| 929 |
$fixed_width = $width !== "auto" && !Helpers::is_percent($width); |
| 930 |
|
| 931 |
// If the frame has a specified width, then we don't need to check |
| 932 |
// its children |
| 933 |
if ($fixed_width) { |
| 934 |
$min = (float) $style->length_in_pt($width, 0); |
| 935 |
$max = $min; |
| 936 |
} else { |
| 937 |
[$min, $max] = $this->get_min_max_child_width(); |
| 938 |
} |
| 939 |
|
| 940 |
// Handle min/max width style properties |
| 941 |
$min_width = $this->resolve_min_width(null); |
| 942 |
$max_width = $this->resolve_max_width(null); |
| 943 |
$min = Helpers::clamp($min, $min_width, $max_width); |
| 944 |
$max = Helpers::clamp($max, $min_width, $max_width); |
| 945 |
|
| 946 |
return [$min, $max]; |
| 947 |
} |
| 948 |
} |
| 949 |
|
