feat: support PDF spread splitting and nav button states

contao/dca/tl_content.php

@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-$GLOBALS['TL_DCA']['tl_content']['palettes']['blatterbares_pdf'] = '{type_legend},type,headline;{flipbook_legend},flipbookPdfSrc,flipbookInitialPages,flipbookStartMode,flipbookShowNavigation,flipbookPlaySound;{template_legend:hide},customTpl;{protected_legend:hide},protected;{expert_legend:hide},cssID;{invisible_legend:hide},invisible,start,stop';
+$GLOBALS['TL_DCA']['tl_content']['palettes']['blatterbares_pdf'] = '{type_legend},type,headline;{flipbook_legend},flipbookPdfSrc,flipbookInitialPages,flipbookStartMode,flipbookSplitSpreads,flipbookShowNavigation,flipbookPlaySound;{template_legend:hide},customTpl;{protected_legend:hide},protected;{expert_legend:hide},cssID;{invisible_legend:hide},invisible,start,stop';
 
 $GLOBALS['TL_DCA']['tl_content']['fields']['flipbookPdfSrc'] = [
     'label' => &$GLOBALS['TL_LANG']['tl_content']['flipbookPdfSrc'],
@@ -32,6 +32,14 @@ $GLOBALS['TL_DCA']['tl_content']['fields']['flipbookStartMode'] = [
     'sql' => ['type' => 'string', 'length' => 16, 'default' => 'center'],
 ];
 
+$GLOBALS['TL_DCA']['tl_content']['fields']['flipbookSplitSpreads'] = [
+    'label' => &$GLOBALS['TL_LANG']['tl_content']['flipbookSplitSpreads'],
+    'exclude' => true,
+    'inputType' => 'checkbox',
+    'eval' => ['tl_class' => 'w50 m12'],
+    'sql' => ['type' => 'string', 'length' => 1, 'fixed' => true, 'default' => '0'],
+];
+
 $GLOBALS['TL_DCA']['tl_content']['fields']['flipbookShowNavigation'] = [
     'label' => &$GLOBALS['TL_LANG']['tl_content']['flipbookShowNavigation'],
     'exclude' => true,

contao/languages/de/tl_content.php

@@ -15,5 +15,6 @@ $GLOBALS['TL_LANG']['tl_content']['flipbookStartModeOptions'] = [
     'center' => 'Zentriert starten',
     'spread' => 'als Doppelseite starten',
 ];
+$GLOBALS['TL_LANG']['tl_content']['flipbookSplitSpreads'] = ['Doppelseiten aufteilen', 'Teilt breite PDF-Seiten ab Seite 2 automatisch in linke und rechte Einzelseite.'];
 $GLOBALS['TL_LANG']['tl_content']['flipbookShowNavigation'] = ['Navigation anzeigen', 'Zeigt Vor-/Zurueck-Buttons unter dem Flipbook an.'];
 $GLOBALS['TL_LANG']['tl_content']['flipbookPlaySound'] = ['Blättersound abspielen', 'Spielt beim Blättern einen Sound ab.'];

contao/languages/en/tl_content.php

@@ -15,5 +15,6 @@ $GLOBALS['TL_LANG']['tl_content']['flipbookStartModeOptions'] = [
     'center' => 'Start centered',
     'spread' => 'Start with double-page spread',
 ];
+$GLOBALS['TL_LANG']['tl_content']['flipbookSplitSpreads'] = ['Split double-page spreads', 'Automatically splits wide PDF pages from page 2 onwards into left and right single pages.'];
 $GLOBALS['TL_LANG']['tl_content']['flipbookShowNavigation'] = ['Show navigation', 'Displays previous/next buttons below the flipbook.'];
 $GLOBALS['TL_LANG']['tl_content']['flipbookPlaySound'] = ['Play page-turn sound', 'Plays a sound effect while turning pages.'];

contao/templates/content_element/blatterbares_pdf.html.twig

@@ -6,6 +6,7 @@
     data-pdf-url="{{ pdfUrl|default('')|e('html_attr') }}"
     data-initial-pages="{{ initialRenderPages|default(4)|e('html_attr') }}"
     data-start-mode="{{ startMode|default('center')|e('html_attr') }}"
+    data-split-spreads="{{ splitSpreads ? '1' : '0' }}"
     data-show-navigation="{{ showNavigation ? '1' : '0' }}"
     data-play-turn-sound="{{ ((playTurnSound is defined) ? playTurnSound : true) ? '1' : '0' }}"
     tabindex="0"