icon_browser: add used_only filter to show only icons in active use

?used_only=1 filters the list to the ~70 icons in $iconUsage.
Toggle link in the template switches between full and filtered view.
icon_style filter is preserved across the toggle.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2 files changed, 13 insertions, 0 deletions

diff --git a/icon_browser.php b/icon_browser.php
index 68d5a5b..8cdf596 100755
--- a/icon_browser.php
+++ b/icon_browser.php
@@ -131,9 +131,15 @@ foreach( $iconThemes as $iconStyle ) {
 	}
 }
 
+$usedOnly = !empty( $_REQUEST['used_only'] );
+if( $usedOnly ) {
+	$iconNames = array_intersect_key( $iconNames, $iconUsage );
+}
+
 asort( $iconNames );
 $gBitSmarty->assign( 'iconNames', $iconNames );
 $gBitSmarty->assign( 'iconList', $iconList );
+$gBitSmarty->assign( 'usedOnly', $usedOnly );
 
 $gBitSystem->display( 'bitpackage:themes/icon_browser.tpl', KernelTools::tra( 'Icon Listing' ) , [ 'display_mode' => 'display' ]);
 
diff --git a/templates/icon_browser.tpl b/templates/icon_browser.tpl
index 43ed76f..d80d5c1 100755
--- a/templates/icon_browser.tpl
+++ b/templates/icon_browser.tpl
@@ -10,6 +10,13 @@
 			The active set is <strong>tango</strong>, built from <a class="external" href="https://gitlab.com/tango-project/tango-icon-theme">Tango3</a> with raster sizes at 16px (small), 24px (medium) and 32px (large), plus scalable SVGs.
 			SVGs are served automatically when no raster file exists for the requested size.
 		</p>
+		<p>
+			{if $usedOnly}
+				{tr}Showing icons in use only.{/tr} <a href="{$smarty.request.SCRIPT_NAME}{if $smarty.request.icon_style}?icon_style={$smarty.request.icon_style}{/if}">{tr}Show all icons{/tr}</a>
+			{else}
+				{tr}Showing all icons.{/tr} <a href="{$smarty.request.SCRIPT_NAME}?used_only=1{if $smarty.request.icon_style}&amp;icon_style={$smarty.request.icon_style}{/if}">{tr}Show used icons only{/tr}</a>
+			{/if}
+		</p>
 		<table class="table data">
 			<tr>
 				{foreach from=$iconList item=icons key=iconStyle}