我正在尝试使用League CommonMark package创建一个剧透块。
该块由三个倒置的感叹号打开,可选后跟一个摘要;三个正常的惊叹号结束了。
这是我到目前为止的代码:
<?php
use League\CommonMark\Block\Element\AbstractBlock;
use League\CommonMark\Cursor;
class Spoiler extends AbstractBlock {
private $summary;
public function __construct($summary = null) {
parent::__construct();
$this->summary = $summary;
}
public function getSummary() { return $this->summary; }
public function canContain(AbstractBlock $block) { return true; }
public function acceptsLines() { return true; }
public function isCode() { return false; }
public function matchesNextLine(Cursor $cursor) {
if ($cursor->match('(^!!!$)')) {
$this->lastLineBlank = true;
return false;
}
return true;
}
}
<?php
use League\CommonMark\Block\Parser\AbstractBlockParser;
use League\CommonMark\ContextInterface;
use League\CommonMark\Cursor;
class SpoilerParser extends AbstractBlockParser {
public function parse(ContextInterface $context, Cursor $cursor) {
if ($cursor->isIndented()) return false;
$previousState = $cursor->saveState();
$spoiler = $cursor->match('(^¡¡¡(\s*.+)?)');
if (is_null($spoiler)) {
$cursor->restoreState($previousState);
return false;
}
$summary = trim(mb_substr($spoiler, mb_strlen('¡¡¡')));
if ($summary !== '') {
$context->addBlock(new Spoiler($summary));
} else {
$context->addBlock(new Spoiler());
}
return true;
}
}
<?php
use League\CommonMark\Block\Element\AbstractBlock;
use League\CommonMark\Block\Renderer\BlockRendererInterface;
use League\CommonMark\ElementRendererInterface;
use League\CommonMark\HtmlElement;
class SpoilerRenderer implements BlockRendererInterface {
public function render(AbstractBlock $block, ElementRendererInterface $htmlRenderer, $inTightList = false) {
if (!($block instanceof Spoiler)) throw new \InvalidArgumentException('Incompatible block type: ' . get_class($block));
$summary = new HtmlElement('summary', [], $block->getSummary() ?: 'Click to expand spoiler');
$content = $summary . "\n" . $htmlRenderer->renderBlocks($block->children());
return new HtmlElement('details', [], $content);
}
}
当我嵌套多个扰流块时出现问题:第一个终结器关闭所有块。
¡¡¡
1
¡¡¡
2
¡¡¡
Hello
!!!
3
!!!
4
!!!
这是解析的AST:
League\CommonMark\Block\Element\Document
App\Helpers\Formatting\Element\Spoiler
League\CommonMark\Block\Element\Paragraph
League\CommonMark\Inline\Element\Text "1"
App\Helpers\Formatting\Element\Spoiler
League\CommonMark\Block\Element\Paragraph
League\CommonMark\Inline\Element\Text "2"
App\Helpers\Formatting\Element\Spoiler
League\CommonMark\Block\Element\Paragraph
League\CommonMark\Inline\Element\Text "Hello"
League\CommonMark\Block\Element\Paragraph
League\CommonMark\Inline\Element\Text "3"
League\CommonMark\Inline\Element\Newline
League\CommonMark\Inline\Element\Text "!!!"
League\CommonMark\Inline\Element\Newline
League\CommonMark\Inline\Element\Text "4"
League\CommonMark\Inline\Element\Newline
League\CommonMark\Inline\Element\Text "!!!"
这是预期的AST:
League\CommonMark\Block\Element\Document
App\Helpers\Formatting\Element\Spoiler
League\CommonMark\Block\Element\Paragraph
League\CommonMark\Inline\Element\Text "1"
App\Helpers\Formatting\Element\Spoiler
League\CommonMark\Block\Element\Paragraph
League\CommonMark\Inline\Element\Text "2"
App\Helpers\Formatting\Element\Spoiler
League\CommonMark\Block\Element\Paragraph
League\CommonMark\Inline\Element\Text "Hello"
League\CommonMark\Block\Element\Paragraph
League\CommonMark\Inline\Element\Text "3"
League\CommonMark\Block\Element\Paragraph
League\CommonMark\Inline\Element\Text "4"
答案 0 :(得分:1)
在这种情况下,<div>
</div>
将始终根据matchesNextLine()
在AST中的迭代方式在顶级Spoiler
上运行。相反,我建议使用DocParser::resetContainer()
来检查结束语法。例如,您可以在现有解析器中添加类似的内容:
SpoilerParser::parse()
这似乎产生了预期的输出:
if ($cursor->match('/^!!!$/')) {
$container = $context->getContainer();
do {
if ($container instanceof Spoiler) {
$context->setContainer($container);
$context->setTip($container);
$context->getBlockCloser()->setLastMatchedContainer($container);
return true;
}
} while ($container = $container->parent());
}
免责声明:虽然基于此输出AST可能是正确的,但我没有验证AST本身。我也没有检查我的建议是否会对解析过程产生负面影响,可能会导致其他元素出现问题或者更深层次的嵌套,因此您可能需要对此进行追踪。但是这种通用方法(在解析器中解析<details><summary>Click to expand spoiler</summary>
<p>1</p>
<details><summary>Click to expand spoiler</summary>
<p>2</p>
<details><summary>Click to expand spoiler</summary>
<p>Hello</p></details>
<p>3</p></details>
<p>4</p></details>
<p></p>
并操纵上下文/ AST)可能是您的最佳选择。
我希望有所帮助!