/lib/rtlcss/RTLCSS.php
PHP | 430 lines | 323 code | 76 blank | 31 comment | 108 complexity | 5481536cbadc89c13a84c02fc810b983 MD5 | raw file
- <?php
- /**
- * RTLCSS.
- *
- * @package MoodleHQ\RTLCSS
- * @copyright 2016 Frédéric Massart - FMCorz.net
- * @license https://opensource.org/licenses/MIT MIT
- */
- namespace MoodleHQ\RTLCSS;
- use Sabberworm\CSS\CSSList\CSSList;
- use Sabberworm\CSS\CSSList\Document;
- use Sabberworm\CSS\OutputFormat;
- use Sabberworm\CSS\Parser;
- use Sabberworm\CSS\Rule\Rule;
- use Sabberworm\CSS\RuleSet\RuleSet;
- use Sabberworm\CSS\Settings;
- use Sabberworm\CSS\Value\CSSFunction;
- use Sabberworm\CSS\Value\CSSString;
- use Sabberworm\CSS\Value\PrimitiveValue;
- use Sabberworm\CSS\Value\RuleValueList;
- use Sabberworm\CSS\Value\Size;
- use Sabberworm\CSS\Value\ValueList;
- /**
- * RTLCSS Class.
- *
- * @package MoodleHQ\RTLCSS
- * @copyright 2016 Frédéric Massart - FMCorz.net
- * @license https://opensource.org/licenses/MIT MIT
- */
- class RTLCSS {
- protected $tree;
- protected $shouldAddCss = [];
- protected $shouldIgnore = false;
- protected $shouldRemove = false;
- public function __construct(Document $tree) {
- $this->tree = $tree;
- }
- protected function compare($what, $to, $ignoreCase) {
- if ($ignoreCase) {
- return strtolower($what) === strtolower($to);
- }
- return $what === $to;
- }
- protected function complement($value) {
- if ($value instanceof Size) {
- $value->setSize(100 - $value->getSize());
- } else if ($value instanceof CSSFunction) {
- $arguments = implode($value->getListSeparator(), $value->getArguments());
- $arguments = "100% - ($arguments)";
- $value->setListComponents([$arguments]);
- }
- }
- public function flip() {
- $this->processBlock($this->tree);
- return $this->tree;
- }
- protected function negate($value) {
- if ($value instanceof ValueList) {
- foreach ($value->getListComponents() as $part) {
- $this->negate($part);
- }
- } else if ($value instanceof Size) {
- if ($value->getSize() != 0) {
- $value->setSize(-$value->getSize());
- }
- }
- }
- protected function parseComments(array $comments) {
- $startRule = '^(\s|\*)*!?rtl:';
- foreach ($comments as $comment) {
- $content = $comment->getComment();
- if (preg_match('/' . $startRule . 'ignore/', $content)) {
- $this->shouldIgnore = 1;
- } else if (preg_match('/' . $startRule . 'begin:ignore/', $content)) {
- $this->shouldIgnore = true;
- } else if (preg_match('/' . $startRule . 'end:ignore/', $content)) {
- $this->shouldIgnore = false;
- } else if (preg_match('/' . $startRule . 'remove/', $content)) {
- $this->shouldRemove = 1;
- } else if (preg_match('/' . $startRule . 'begin:remove/', $content)) {
- $this->shouldRemove = true;
- } else if (preg_match('/' . $startRule . 'end:remove/', $content)) {
- $this->shouldRemove = false;
- } else if (preg_match('/' . $startRule . 'raw:/', $content)) {
- $this->shouldAddCss[] = preg_replace('/' . $startRule . 'raw:/', '', $content);
- }
- }
- }
- protected function processBackground(Rule $rule) {
- $value = $rule->getValue();
- // TODO Fix upstream library as it does not parse this well, commas don't take precedence.
- // There can be multiple sets of properties per rule.
- $hasItems = false;
- $items = [$value];
- if ($value instanceof RuleValueList && $value->getListSeparator() == ',') {
- $hasItems = true;
- $items = $value->getListComponents();
- }
- // Foreach set.
- foreach ($items as $itemKey => $item) {
- // There can be multiple values in the same set.
- $hasValues = false;
- $parts = [$item];
- if ($item instanceof RuleValueList) {
- $hasValues = true;
- $parts = $value->getListComponents();
- }
- $requiresPositionalArgument = false;
- $hasPositionalArgument = false;
- foreach ($parts as $key => $part) {
- $part = $parts[$key];
- if (!is_object($part)) {
- $flipped = $this->swapLeftRight($part);
- // Positional arguments can have a size following.
- $hasPositionalArgument = $parts[$key] != $flipped;
- $requiresPositionalArgument = true;
- $parts[$key] = $flipped;
- continue;
- } else if ($part instanceof CSSFunction && strpos($part->getName(), 'gradient') !== false) {
- // TODO Fix this.
- } else if ($part instanceof Size && ($part->getUnit() === '%' || !$part->getUnit())) {
- // Is this a value we're interested in?
- if (!$requiresPositionalArgument || $hasPositionalArgument) {
- $this->complement($part);
- $part->setUnit('%');
- // We only need to change one value.
- break;
- }
- }
- $hasPositionalArgument = false;
- }
- if ($hasValues) {
- $item->setListComponents($parts);
- } else {
- $items[$itemKey] = $parts[$key];
- }
- }
- if ($hasItems) {
- $value->setListComponents($items);
- } else {
- $rule->setValue($items[0]);
- }
- }
- protected function processBlock($block) {
- $contents = [];
- foreach ($block->getContents() as $node) {
- $this->parseComments($node->getComments());
- if ($toAdd = $this->shouldAddCss()) {
- foreach ($toAdd as $add) {
- $parser = new Parser($add);
- $contents[] = $parser->parse();
- }
- }
- if ($this->shouldRemoveNext()) {
- continue;
- } else if (!$this->shouldIgnoreNext()) {
- if ($node instanceof CSSList) {
- $this->processBlock($node);
- }
- if ($node instanceof RuleSet) {
- $this->processDeclaration($node);
- }
- }
- $contents[] = $node;
- }
- $block->setContents($contents);
- }
- protected function processDeclaration($node) {
- $rules = [];
- foreach ($node->getRules() as $key => $rule) {
- $this->parseComments($rule->getComments());
- if ($toAdd = $this->shouldAddCss()) {
- foreach ($toAdd as $add) {
- $parser = new Parser('.wrapper{' . $add . '}');
- $tree = $parser->parse();
- $contents = $tree->getContents();
- foreach ($contents[0]->getRules() as $newRule) {
- $rules[] = $newRule;
- }
- }
- }
- if ($this->shouldRemoveNext()) {
- continue;
- } else if (!$this->shouldIgnoreNext()) {
- $this->processRule($rule);
- }
- $rules[] = $rule;
- }
- $node->setRules($rules);
- }
- protected function processRule($rule) {
- $property = $rule->getRule();
- $value = $rule->getValue();
- if (preg_match('/direction$/im', $property)) {
- $rule->setValue($this->swapLtrRtl($value));
- } else if (preg_match('/left/im', $property)) {
- $rule->setRule(str_replace('left', 'right', $property));
- } else if (preg_match('/right/im', $property)) {
- $rule->setRule(str_replace('right', 'left', $property));
- } else if (preg_match('/transition(-property)?$/i', $property)) {
- $rule->setValue($this->swapLeftRight($value));
- } else if (preg_match('/float|clear|text-align/i', $property)) {
- $rule->setValue($this->swapLeftRight($value));
- } else if (preg_match('/^(margin|padding|border-(color|style|width))$/i', $property)) {
- if ($value instanceof RuleValueList) {
- $values = $value->getListComponents();
- $count = count($values);
- if ($count == 4) {
- $right = $values[3];
- $values[3] = $values[1];
- $values[1] = $right;
- }
- $value->setListComponents($values);
- }
- } else if (preg_match('/border-radius/i', $property)) {
- if ($value instanceof RuleValueList) {
- // Border radius can contain two lists separated by a slash.
- $groups = $value->getListComponents();
- if ($value->getListSeparator() !== '/') {
- $groups = [$value];
- }
- foreach ($groups as $group) {
- if ($group instanceof RuleValueList) {
- $values = $group->getListComponents();
- switch (count($values)) {
- case 2:
- $group->setListComponents(array_reverse($values));
- break;
- case 3:
- $group->setListComponents([$values[1], $values[0], $values[1], $values[2]]);
- break;
- case 4:
- $group->setListComponents([$values[1], $values[0], $values[3], $values[2]]);
- break;
- }
- }
- }
- }
- } else if (preg_match('/shadow/i', $property)) {
- // TODO Fix upstream, each shadow should be in a RuleValueList.
- if ($value instanceof RuleValueList) {
- // negate($value->getListComponents()[0]);
- }
- } else if (preg_match('/transform-origin/i', $property)) {
- $this->processTransformOrigin($rule);
- } else if (preg_match('/^(?!text\-).*?transform$/i', $property)) {
- // TODO Parse function parameters first.
- } else if (preg_match('/background(-position(-x)?|-image)?$/i', $property)) {
- $this->processBackground($rule);
- } else if (preg_match('/cursor/i', $property)) {
- $hasList = false;
- $parts = [$value];
- if ($value instanceof RuleValueList) {
- $hastList = true;
- $parts = $value->getListComponents();
- }
- foreach ($parts as $key => $part) {
- if (!is_object($part)) {
- $parts[$key] = preg_replace_callback('/\b(ne|nw|se|sw|nesw|nwse)-resize/', function($matches) {
- return str_replace($matches[1], str_replace(['e', 'w', '*'], ['*', 'e', 'w'], $matches[1]), $matches[0]);
- }, $part);
- }
- }
- if ($hasList) {
- $value->setListComponents($parts);
- } else {
- $rule->setValue($parts[0]);
- }
- }
- }
- protected function processTransformOrigin(Rule $rule) {
- $value = $rule->getValue();
- $foundLeftOrRight = false;
- // Search for left or right.
- $parts = [$value];
- if ($value instanceof RuleValueList) {
- $parts = $value->getListComponents();
- $isInList = true;
- }
- foreach ($parts as $key => $part) {
- if (!is_object($part) && preg_match('/left|right/i', $part)) {
- $foundLeftOrRight = true;
- $parts[$key] = $this->swapLeftRight($part);
- }
- }
- if ($foundLeftOrRight) {
- // We need to reconstruct the value because left/right are not represented by an object.
- $list = new RuleValueList(' ');
- $list->setListComponents($parts);
- $rule->setValue($list);
- } else {
- $value = $parts[0];
- // The first value may be referencing top or bottom (y instead of x).
- if (!is_object($value) && preg_match('/top|bottom/i', $value) && count($parts)>1) {
- $value = $parts[1];
- }
- // Flip the value.
- if ($value instanceof Size) {
- if ($value->getSize() == 0) {
- $value->setSize(100);
- $value->setUnit('%');
- } else if ($value->getUnit() === '%') {
- $this->complement($value);
- }
- } else if ($value instanceof CSSFunction && strpos($value->getName(), 'calc') !== false) {
- // TODO Fix upstream calc parsing.
- $this->complement($value);
- }
- }
- }
- protected function shouldAddCss() {
- if (!empty($this->shouldAddCss)) {
- $css = $this->shouldAddCss;
- $this->shouldAddCss = [];
- return $css;
- }
- return [];
- }
- protected function shouldIgnoreNext() {
- if ($this->shouldIgnore) {
- if (is_int($this->shouldIgnore)) {
- $this->shouldIgnore--;
- }
- return true;
- }
- return false;
- }
- protected function shouldRemoveNext() {
- if ($this->shouldRemove) {
- if (is_int($this->shouldRemove)) {
- $this->shouldRemove--;
- }
- return true;
- }
- return false;
- }
- protected function swap($value, $a, $b, $options = ['scope' => '*', 'ignoreCase' => true]) {
- $expr = preg_quote($a) . '|' . preg_quote($b);
- if (!empty($options['greedy'])) {
- $expr = '\\b(' . $expr . ')\\b';
- }
- $flags = !empty($options['ignoreCase']) ? 'im' : 'm';
- $expr = "/$expr/$flags";
- return preg_replace_callback($expr, function($matches) use ($a, $b, $options) {
- return $this->compare($matches[0], $a, !empty($options['ignoreCase'])) ? $b : $a;
- }, $value);
- }
- protected function swapLeftRight($value) {
- return $this->swap($value, 'left', 'right');
- }
- protected function swapLtrRtl($value) {
- return $this->swap($value, 'ltr', 'rtl');
- }
- }