Add grouping feature

README.md

@@ -23,6 +23,7 @@ luxtools provides DokuWiki syntax that:
 
 - Lists a directory's direct children (files + folders) or files matching a glob pattern
 - Renders an image thumbnail gallery (with lightbox)
+- Groups multiple `{{image>...}}` blocks in compact grid/flex layouts
 - Provides "open this folder/path" links for local workflows
 - Embeds file-backed scratchpads with a minimal inline editor (no wiki revisions)
 - Links a page to a media folder via a UUID (.pagelink), enabling a `blobs/` alias
@@ -310,7 +311,52 @@ 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)
+### 5) Group multiple image boxes compactly
+
+Use `<grouping> ... </grouping>` to arrange multiple `{{image>...}}` entries in less vertical space.
+
+```text
+<grouping>
+{{image>/Scape/photos/1.jpg|One|300}}
+{{image>/Scape/photos/2.jpg|Two|300}}
+{{image>/Scape/photos/3.jpg|Three|300}}
+{{image>/Scape/photos/4.jpg|Four|300}}
+</grouping>
+
+<grouping layout="flex" gap="0" justify="start" align="start">
+{{image>/Scape/photos/1.jpg|One|220}}
+{{image>/Scape/photos/2.jpg|Two|220}}
+{{image>/Scape/photos/3.jpg|Three|220}}
+</grouping>
+
+<grouping layout="grid" cols="3" gap="0.4rem">
+{{image>/Scape/photos/1.jpg|One|260}}
+{{image>/Scape/photos/2.jpg|Two|260}}
+{{image>/Scape/photos/3.jpg|Three|260}}
+</grouping>
+
+<grouping layout="flex" gap="0.5rem" justify="space-between" align="center">
+{{image>/Scape/photos/1.jpg|One|220}}
+{{image>/Scape/photos/2.jpg|Two|220}}
+{{image>/Scape/photos/3.jpg|Three|220}}
+</grouping>
+```
+
+Supported attributes on the opening tag:
+
+- `layout`: `flex` (default) or `grid`
+- `cols`: integer >= 1 (default `2`, used by `grid`)
+- `gap`: CSS length token such as `0`, `0.6rem`, `8px` (default `0`)
+- `justify`: `start`, `center`, `end`, `space-between`, `space-around`, `space-evenly` (default `start`)
+- `align`: `start`, `center`, `end`, `stretch`, `baseline` (default `start`)
+
+Notes:
+- The wrapper only controls layout. It adds no own border/background/frame.
+- Invalid values silently fall back to defaults.
+- Unknown attributes render a small warning string, e.g. `[grouping: unknown option(s): gpa]`.
+- Existing standalone `{{image>...}}` behavior is unchanged outside `<grouping>`.
+
+### 6) Open a local path/folder (best-effort)
 
 ```
 {{open>/Scape/projects|Open projects folder}}
@@ -322,7 +368,7 @@ Behaviour:
 - Prefer calling the configured local client service (open_service_url).
 - Fall back to opening a file:// URL in a new tab (often blocked by browsers).
 
-### 6) Scratchpads (shared, file-backed, no page revisions)
+### 7) Scratchpads (shared, file-backed, no page revisions)
 
 ```
 {{scratchpad>start}}
@@ -330,7 +376,7 @@ Behaviour:
 
 Scratchpads render the referenced file as wikitext and (when you have edit rights on the host page) provide an inline editor that saves directly to the backing file.
 
-### 7) Link Favicons (automatic)
+### 8) Link Favicons (automatic)
 
 External links automatically display the favicon of the linked website. This feature:
 

_test/SyntaxTest.php

@@ -239,6 +239,101 @@ class plugin_luxtools_test extends DokuWikiTest
         $this->assertStringContainsString('height="150"', $xhtml);
     }
 
+    /**
+     * Grouping wrapper should use default flex mode with zero gap.
+     */
+    public function test_grouping_default_flex()
+    {
+        $imagePath = TMP_DIR . '/filelistdata/exampleimage.png';
+        $syntax = '<grouping>'
+            . '{{image>' . $imagePath . '|One|120}}'
+            . '{{image>' . $imagePath . '|Two|120}}'
+            . '</grouping>';
+
+        $instructions = p_get_instructions($syntax);
+        $xhtml = p_render('xhtml', $instructions, $info);
+
+        $doc = new Document();
+        $doc->html($xhtml);
+
+        $structure = [
+            'div.luxtools-grouping.luxtools-grouping--flex' => 1,
+            'div.luxtools-grouping .luxtools-imagebox' => 2,
+        ];
+        $this->structureCheck($doc, $structure);
+
+        $style = (string)$doc->find('div.luxtools-grouping')->first()->attr('style');
+        $this->assertStringContainsString('--luxtools-grouping-cols: 2', $style);
+        $this->assertStringContainsString('--luxtools-grouping-gap: 0', $style);
+        $this->assertStringContainsString('--luxtools-grouping-justify: start', $style);
+        $this->assertStringContainsString('--luxtools-grouping-align: start', $style);
+    }
+
+    /**
+     * Grouping wrapper should accept custom flex layout and gap.
+     */
+    public function test_grouping_custom_flex()
+    {
+        $imagePath = TMP_DIR . '/filelistdata/exampleimage.png';
+        $syntax = '<grouping layout="flex" gap="8px">'
+            . '{{image>' . $imagePath . '|One|120}}'
+            . '{{image>' . $imagePath . '|Two|120}}'
+            . '</grouping>';
+
+        $instructions = p_get_instructions($syntax);
+        $xhtml = p_render('xhtml', $instructions, $info);
+
+        $doc = new Document();
+        $doc->html($xhtml);
+
+        $structure = [
+            'div.luxtools-grouping.luxtools-grouping--flex' => 1,
+            'div.luxtools-grouping .luxtools-imagebox' => 2,
+        ];
+        $this->structureCheck($doc, $structure);
+
+        $style = (string)$doc->find('div.luxtools-grouping')->first()->attr('style');
+        $this->assertStringContainsString('--luxtools-grouping-gap: 8px', $style);
+    }
+
+    /**
+     * Grouping wrapper should accept justify and align controls.
+     */
+    public function test_grouping_justify_and_align()
+    {
+        $imagePath = TMP_DIR . '/filelistdata/exampleimage.png';
+        $syntax = '<grouping layout="flex" justify="space-between" align="center">'
+            . '{{image>' . $imagePath . '|One|120}}'
+            . '{{image>' . $imagePath . '|Two|120}}'
+            . '</grouping>';
+
+        $instructions = p_get_instructions($syntax);
+        $xhtml = p_render('xhtml', $instructions, $info);
+
+        $doc = new Document();
+        $doc->html($xhtml);
+
+        $style = (string)$doc->find('div.luxtools-grouping')->first()->attr('style');
+        $this->assertStringContainsString('--luxtools-grouping-justify: space-between', $style);
+        $this->assertStringContainsString('--luxtools-grouping-align: center', $style);
+    }
+
+    /**
+     * Unknown grouping attributes should render a warning string.
+     */
+    public function test_grouping_unknown_option_warning()
+    {
+        $imagePath = TMP_DIR . '/filelistdata/exampleimage.png';
+        $syntax = '<grouping gpa="0.5rem">'
+            . '{{image>' . $imagePath . '|One|120}}'
+            . '</grouping>';
+
+        $instructions = p_get_instructions($syntax);
+        $xhtml = p_render('xhtml', $instructions, $info);
+
+        $this->assertStringContainsString('[grouping: unknown option(s): gpa]', $xhtml);
+    }
+
     /**
      * Ensure the built-in file endpoint includes the host page id so file.php can
      * enforce per-page ACL.

style.css

@@ -422,6 +422,31 @@ html.luxtools-noscroll body {
     }
 }
 
+/* ========================================================================
+ * Grouping wrapper (compact image layout container)
+ * ======================================================================== */
+
+.luxtools-grouping {
+    display: grid;
+    grid-template-columns: repeat(var(--luxtools-grouping-cols, 2), minmax(0, 1fr));
+    gap: var(--luxtools-grouping-gap, 0);
+    justify-content: var(--luxtools-grouping-justify, start);
+    align-items: var(--luxtools-grouping-align, start);
+}
+
+.luxtools-grouping.luxtools-grouping--flex {
+    display: flex;
+    flex-wrap: wrap;
+    gap: var(--luxtools-grouping-gap, 0);
+}
+
+/* Let the grouping layout fully control item placement. */
+.luxtools-grouping .luxtools-imagebox {
+    float: none;
+    clear: none;
+    margin: 0;
+}
+
 /* ========================================================================
  * Imagebox (Wikipedia-style image with caption)
  * ======================================================================== */

syntax/grouping.php

@@ -0,0 +1,282 @@
+<?php
+
+use dokuwiki\Extension\SyntaxPlugin;
+
+require_once(__DIR__ . '/../autoload.php');
+
+/**
+ * luxtools Plugin: Grouping wrapper syntax.
+ *
+ * Wraps multiple blocks (typically {{image>...}}) and applies compact layout
+ * without adding visual box styling of its own.
+ *
+ * Syntax:
+ * <grouping layout="flex" gap="0" justify="start" align="start">
+ *   {{image>...}}
+ *   {{image>...}}
+ * </grouping>
+ */
+class syntax_plugin_luxtools_grouping extends SyntaxPlugin
+{
+    /** @inheritdoc */
+    public function getType()
+    {
+        return 'container';
+    }
+
+    /** @inheritdoc */
+    public function getPType()
+    {
+        return 'block';
+    }
+
+    /** @inheritdoc */
+    public function getSort()
+    {
+        // Slightly after image syntax
+        return 316;
+    }
+
+    /** @inheritdoc */
+    public function getAllowedTypes()
+    {
+        return ['container', 'substition', 'protected', 'disabled', 'formatting'];
+    }
+
+    /** @inheritdoc */
+    public function connectTo($mode)
+    {
+        $this->Lexer->addEntryPattern('<grouping(?:\s+[^>]*)?>(?=.*</grouping>)', $mode, 'plugin_luxtools_grouping');
+    }
+
+    /** @inheritdoc */
+    public function postConnect()
+    {
+        $this->Lexer->addExitPattern('</grouping>', 'plugin_luxtools_grouping');
+    }
+
+    /** @inheritdoc */
+    public function handle($match, $state, $pos, Doku_Handler $handler)
+    {
+        if ($state === DOKU_LEXER_ENTER) {
+            $parsed = $this->parseOpeningTag($match);
+            return [
+                'state' => $state,
+                'params' => $parsed['params'],
+                'unknown' => $parsed['unknown'],
+            ];
+        }
+
+        if ($state === DOKU_LEXER_UNMATCHED) {
+            return [
+                'state' => $state,
+                'text' => $match,
+            ];
+        }
+
+        return [
+            'state' => $state,
+        ];
+    }
+
+    /** @inheritdoc */
+    public function render($format, Doku_Renderer $renderer, $data)
+    {
+        if (!is_array($data) || !isset($data['state'])) {
+            return false;
+        }
+
+        $state = (int)$data['state'];
+
+        if ($format !== 'xhtml') {
+            if ($state === DOKU_LEXER_UNMATCHED && isset($data['text'])) {
+                $renderer->cdata((string)$data['text']);
+            }
+            return true;
+        }
+
+        if (!($renderer instanceof Doku_Renderer_xhtml)) {
+            return true;
+        }
+
+        if ($state === DOKU_LEXER_ENTER) {
+            $params = isset($data['params']) && is_array($data['params']) ? $data['params'] : $this->getDefaultParams();
+            $unknown = isset($data['unknown']) && is_array($data['unknown']) ? $data['unknown'] : [];
+
+            $layout = ($params['layout'] === 'flex') ? 'flex' : 'grid';
+            $cols = (int)$params['cols'];
+            if ($cols < 1) {
+                $cols = 2;
+            }
+
+            $gap = (string)$params['gap'];
+            if (!$this->isValidCssLength($gap)) {
+                $gap = '0';
+            }
+
+            $justify = (string)$params['justify'];
+            if (!$this->isValidJustify($justify)) {
+                $justify = 'start';
+            }
+
+            $align = (string)$params['align'];
+            if (!$this->isValidAlign($align)) {
+                $align = 'start';
+            }
+
+            $renderer->doc .= '<div class="luxtools-grouping luxtools-grouping--' . hsc($layout) . '"'
+                . ' style="--luxtools-grouping-cols: ' . $cols
+                . '; --luxtools-grouping-gap: ' . hsc($gap)
+                . '; --luxtools-grouping-justify: ' . hsc($justify)
+                . '; --luxtools-grouping-align: ' . hsc($align)
+                . ';">';
+
+            if ($unknown !== []) {
+                $renderer->doc .= '<span class="luxtools-grouping-warning">'
+                    . hsc('[grouping: unknown option(s): ' . implode(', ', $unknown) . ']')
+                    . '</span>';
+            }
+            return true;
+        }
+
+        if ($state === DOKU_LEXER_UNMATCHED) {
+            if (isset($data['text'])) {
+                $renderer->cdata((string)$data['text']);
+            }
+            return true;
+        }
+
+        if ($state === DOKU_LEXER_EXIT) {
+            $renderer->doc .= '</div>';
+            return true;
+        }
+
+        return true;
+    }
+
+    /**
+     * Parse opening <grouping ...> tag attributes.
+     *
+     * Supports attribute style only, e.g.
+     * layout="grid" cols="3" gap="8px" justify="center" align="stretch".
+     * Unknown or invalid values are ignored and defaults are used.
+     *
+     * @param string $match
+     * @return array{params:array{layout:string,cols:int,gap:string,justify:string,align:string},unknown:array<int,string>}
+     */
+    protected function parseOpeningTag(string $match): array
+    {
+        $params = $this->getDefaultParams();
+        $unknown = [];
+
+        if (!preg_match('/^<grouping\b(.*?)>$/is', $match, $tagMatch)) {
+            return ['params' => $params, 'unknown' => $unknown];
+        }
+
+        $attrPart = (string)$tagMatch[1];
+        if ($attrPart === '') {
+            return ['params' => $params, 'unknown' => $unknown];
+        }
+
+        if (preg_match_all('/([a-zA-Z_:][a-zA-Z0-9:._-]*)\s*=\s*(["\'])(.*?)\2/s', $attrPart, $attrMatches, PREG_SET_ORDER)) {
+            foreach ($attrMatches as $item) {
+                $name = strtolower(trim((string)$item[1]));
+                $value = trim((string)$item[3]);
+
+                if ($name === 'layout') {
+                    $value = strtolower($value);
+                    if (in_array($value, ['grid', 'flex'], true)) {
+                        $params['layout'] = $value;
+                    }
+                    continue;
+                }
+
+                if ($name === 'cols') {
+                    if (preg_match('/^\d+$/', $value)) {
+                        $cols = (int)$value;
+                        if ($cols > 0) {
+                            $params['cols'] = min($cols, 12);
+                        }
+                    }
+                    continue;
+                }
+
+                if ($name === 'gap') {
+                    if ($this->isValidCssLength($value)) {
+                        $params['gap'] = $value;
+                    }
+                    continue;
+                }
+
+                if ($name === 'justify') {
+                    $value = strtolower($value);
+                    if ($this->isValidJustify($value)) {
+                        $params['justify'] = $value;
+                    }
+                    continue;
+                }
+
+                if ($name === 'align') {
+                    $value = strtolower($value);
+                    if ($this->isValidAlign($value)) {
+                        $params['align'] = $value;
+                    }
+                    continue;
+                }
+
+                $unknown[] = $name;
+            }
+        }
+
+        if ($unknown !== []) {
+            $unknown = array_values(array_unique($unknown));
+        }
+
+        return ['params' => $params, 'unknown' => $unknown];
+    }
+
+    /**
+     * @return array{layout:string,cols:int,gap:string,justify:string,align:string}
+     */
+    protected function getDefaultParams(): array
+    {
+        return [
+            'layout' => 'flex',
+            'cols' => 2,
+            'gap' => '0',
+            'justify' => 'start',
+            'align' => 'start',
+        ];
+    }
+
+    /**
+     * Validate a simple CSS length token.
+     *
+     * Allows "0" and common explicit units used in docs/examples.
+     */
+    protected function isValidCssLength(string $value): bool
+    {
+        $value = trim($value);
+        if ($value === '0') {
+            return true;
+        }
+
+        return (bool)preg_match('/^(?:\d+(?:\.\d+)?|\.\d+)(?:px|em|rem|%|vw|vh)$/', $value);
+    }
+
+    /**
+     * Validate justify-content compatible values.
+     */
+    protected function isValidJustify(string $value): bool
+    {
+        return in_array($value, ['start', 'center', 'end', 'space-between', 'space-around', 'space-evenly'], true);
+    }
+
+    /**
+     * Validate align-items compatible values.
+     */
+    protected function isValidAlign(string $value): bool
+    {
+        return in_array($value, ['start', 'center', 'end', 'stretch', 'baseline'], true);
+    }
+}