Support search highlights when matching URL content

DefaultFormatter:
  - format 'a' tag content and not href attribute
  - format hashtags properly
Markdown(Extra)Formatter:
  - Extend Parsedown to format highlight properly: https://github.com/erusev/parsedown/wiki/Tutorial:-Create-Extensions

Fixes #1681

3 files changed, 70 insertions, 0 deletions

diff --git a/application/formatter/Parsedown/ShaarliParsedown.php b/application/formatter/Parsedown/ShaarliParsedown.php
new file mode 100644
index 00000000..d577bdfa
--- /dev/null
+++ b/application/formatter/Parsedown/ShaarliParsedown.php
@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Formatter\Parsedown;
+
+class ShaarliParsedown extends \Parsedown
+{
+    use ShaarliParsedownTrait;
+}
diff --git a/application/formatter/Parsedown/ShaarliParsedownExtra.php b/application/formatter/Parsedown/ShaarliParsedownExtra.php
new file mode 100644
index 00000000..92ad26ca
--- /dev/null
+++ b/application/formatter/Parsedown/ShaarliParsedownExtra.php
@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Formatter\Parsedown;
+
+class ShaarliParsedownExtra extends \ParsedownExtra
+{
+    use ShaarliParsedownTrait;
+}
diff --git a/application/formatter/Parsedown/ShaarliParsedownTrait.php b/application/formatter/Parsedown/ShaarliParsedownTrait.php
new file mode 100644
index 00000000..e6f4dabb
--- /dev/null
+++ b/application/formatter/Parsedown/ShaarliParsedownTrait.php
@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Formatter\Parsedown;
+
+use Shaarli\Formatter\BookmarkDefaultFormatter as Formatter;
+
+trait ShaarliParsedownTrait
+{
+    protected function inlineLink($excerpt)
+    {
+        return $this->shaarliFormatLink(parent::inlineLink($excerpt), true);
+    }
+
+    protected function inlineUrl($excerpt)
+    {
+        return $this->shaarliFormatLink(parent::inlineUrl($excerpt), false);
+    }
+
+    protected function shaarliFormatLink(?array $link, bool $fullWrap): ?array
+    {
+        if (
+            is_array($link)
+            && strpos($link['element']['attributes']['href'], Formatter::SEARCH_HIGHLIGHT_OPEN) !== false
+            && strpos($link['element']['attributes']['href'], Formatter::SEARCH_HIGHLIGHT_CLOSE) !== false
+        ) {
+            $link['element']['attributes']['href'] = $this->shaarliRemoveSearchTokens(
+                $link['element']['attributes']['href']
+            );
+
+            if ($fullWrap) {
+                $link['element']['text'] = Formatter::SEARCH_HIGHLIGHT_OPEN .
+                    $link['element']['text'] .
+                    Formatter::SEARCH_HIGHLIGHT_CLOSE
+                ;
+            }
+        }
+
+        return $link;
+    }
+
+    protected function shaarliRemoveSearchTokens(string $entry): string
+    {
+        $entry = str_replace(Formatter::SEARCH_HIGHLIGHT_OPEN, '', $entry);
+        $entry = str_replace(Formatter::SEARCH_HIGHLIGHT_CLOSE, '', $entry);
+
+        return $entry;
+    }
+}