Allow hotlinking images

README.md

@@ -220,20 +220,29 @@ Clicking a thumbnail opens a lightbox viewer. Thumbnails are generated and cache
 
 ```
 {{image>/Scape/photos/picture.jpg|This is the caption}}
-{{image>/Scape/photos/picture.jpg?400|Resized to 400px width}}
-{{image>/Scape/photos/picture.jpg?400x300|Fixed dimensions}}
-{{image>/Scape/photos/picture.jpg?left|Float left}}
-{{image>/Scape/photos/picture.jpg?400&center|Resized and centered}}
+{{image>/Scape/photos/picture.jpg|Caption|400}}
+{{image>/Scape/photos/picture.jpg|Caption|400x300}}
+{{image>/Scape/photos/picture.jpg|Caption|left}}
+{{image>/Scape/photos/picture.jpg|Caption|400&center}}
+{{image>https://example.com/images/picture.jpg|Remote image caption}}
+{{image>https://example.com/images/picture.jpg|Remote caption|400x300&left}}
 ```
 
-Renders a Wikipedia-style image box with optional caption. Parameters after `?` are separated by `&`:
+Renders a Wikipedia-style image box with optional caption. The syntax uses pipe-separated parts:
 
-- Size: `?200` (width) or `?200x150` (width × height)
-- Alignment: `?left`, `?right` (default), or `?center`
-- Combined: `?400&left` or `?400x300&center`
+- `{{image>path|caption}}` – Image with caption (uses defaults)
+- `{{image>path|caption|options}}` – Image with caption and options
+
+Options (in the third part, separated by `&`):
+
+- Size: `200` (width) or `200x150` (width × height)
+- Alignment: `left`, `right` (default), or `center`
+- Combined: `400&left` or `400x300&center`
 
 The image links to the full-size version when clicked.
 
+Remote images (HTTP/HTTPS URLs) are linked directly without proxying or thumbnailing.
+
 ### 5) Open a local path/folder (best-effort)
 
 ```

file.php

@@ -224,7 +224,7 @@ try {
         echo 'Path not readable: ' . $pathInfo['path'];
         exit;
     }
-    [$ext, $mime, $download] = mimetype($pathInfo['path'], false);
+    [, $mime, $download] = mimetype($pathInfo['path'], false);
 
     // Optional thumbnail mode: ?thumb=1&w=150&h=150
     $thumb = (int)$INPUT->int('thumb');

src/ThumbnailHelper.php

@@ -9,6 +9,22 @@ namespace dokuwiki\plugin\luxtools;
  */
 class ThumbnailHelper
 {
+    /**
+     * Check if a string is a HTTP/HTTPS URL.
+     *
+     * @param string $url
+     * @return bool
+     */
+    public static function isRemoteUrl(string $url): bool
+    {
+        if ($url === '') return false;
+        $parts = @parse_url($url);
+        if (!is_array($parts)) return false;
+        if (empty($parts['scheme']) || empty($parts['host'])) return false;
+        $scheme = strtolower((string)$parts['scheme']);
+        return in_array($scheme, ['http', 'https'], true);
+    }
+
     /**
      * Get thumbnail URL and metadata for rendering.
      *

syntax/image.php

@@ -45,34 +45,26 @@ class syntax_plugin_luxtools_image extends SyntaxPlugin
         // Remove the leading {{image> and trailing }}
         $match = substr($match, strlen('{{image>'), -2);
 
-        // Split path and caption by |
-        $parts = explode('|', $match, 2);
+        // Split by | into: path, caption, options
+        // Format: {{image>path|caption|options}}
+        $parts = explode('|', $match, 3);
         $pathPart = trim($parts[0]);
         $caption = isset($parts[1]) ? trim($parts[1]) : '';
+        $optionStr = isset($parts[2]) ? trim($parts[2]) : '';
 
-        // Parse optional parameters from path (e.g., /path/image.jpg?200x150&right)
-        // Supported formats:
-        //   ?200        - width only
-        //   ?200x150    - width and height
-        //   ?left       - alignment only (left, right, center)
-        //   ?200&right  - width and alignment
-        //   ?200x150&center - full options
+        // Parse options from third part (e.g., "200x150&right")
         $width = null;
         $height = null;
-        $align = null; // Will use default if not specified
+        $align = null;
 
-        if (strpos($pathPart, '?') !== false) {
-            [$pathPart, $paramStr] = explode('?', $pathPart, 2);
-            $paramParts = explode('&', $paramStr);
-
-            foreach ($paramParts as $param) {
+        if ($optionStr !== '') {
+            $optionParts = explode('&', $optionStr);
+            foreach ($optionParts as $param) {
                 $param = trim($param);
                 if ($param === '') continue;
 
-                // Check if it's an alignment keyword
                 if (in_array($param, ['left', 'right', 'center'], true)) {
                     $align = $param;
-                // Check if it's a size specification (digits, optionally with 'x' and more digits)
                 } elseif (preg_match('/^(\d+)(?:x(\d+))?$/', $param, $m)) {
                     $width = (int)$m[1];
                     if (isset($m[2]) && $m[2] !== '') {
@@ -82,10 +74,12 @@ class syntax_plugin_luxtools_image extends SyntaxPlugin
             }
         }
 
-        $path = Path::cleanPath($pathPart, false);
+        $isRemote = ThumbnailHelper::isRemoteUrl($pathPart);
+        $path = $isRemote ? $pathPart : Path::cleanPath($pathPart, false);
 
         return [
             'path' => $path,
+            'is_remote' => $isRemote,
             'caption' => $caption,
             'align' => $align,
             'width' => $width,
@@ -120,6 +114,23 @@ class syntax_plugin_luxtools_image extends SyntaxPlugin
             }
         }
 
+        if (!empty($data['is_remote'])) {
+            if (empty($data['path']) || !ThumbnailHelper::isRemoteUrl($data['path'])) {
+                $renderer->cdata('[n/a: Invalid URL]');
+                return true;
+            }
+
+            // Remote images: link directly, no proxying or thumbnailing
+            $thumb = [
+                'url' => $data['path'],
+                'isFinal' => true,
+                'thumbUrl' => $data['path'],
+            ];
+
+            $this->renderImageBox($renderer, $thumb, $data['path'], $data);
+            return true;
+        }
+
         try {
             $pathHelper = new Path($this->getConf('paths'));
             // Use addTrailingSlash=false since this is a file path, not a directory
@@ -162,7 +173,7 @@ class syntax_plugin_luxtools_image extends SyntaxPlugin
         );
 
         // Build full-size URL for linking
-        $fullUrl = $this->buildFileUrl($pathInfo, null, null, false);
+        $fullUrl = $this->buildImageUrl($pathInfo, null, null, false);
 
         $this->renderImageBox($renderer, $thumb, $fullUrl, $data);
 
@@ -170,15 +181,15 @@ class syntax_plugin_luxtools_image extends SyntaxPlugin
     }
 
     /**
-     * Build the file.php URL for the image.
+     * Build the file.php URL for a local image.
      *
-     * @param array $pathInfo Path info from Path helper
+     * @param array $pathInfo Path info array from Path helper
      * @param int|null $width Optional width
      * @param int|null $height Optional height
      * @param bool $thumbnail Whether to generate a thumbnail
      * @return string
      */
-    protected function buildFileUrl(array $pathInfo, ?int $width, ?int $height, bool $thumbnail = false): string
+    protected function buildImageUrl(array $pathInfo, ?int $width, ?int $height, bool $thumbnail): string
     {
         global $ID;
 
@@ -189,9 +200,8 @@ class syntax_plugin_luxtools_image extends SyntaxPlugin
         ];
 
         if ($thumbnail && ($width !== null || $height !== null)) {
-            // Enable thumbnail mode (same as gallery logic)
             $params['thumb'] = 1;
-            $params['q'] = 80; // JPEG quality
+            $params['q'] = 80;
         }
 
         if ($width !== null) {