April 8, 2004

A patch to the Drupal image module

I wrote a small patch to the Drupal image module that provides a block to list the top-level image taxonomy terms (the set of galleries you get when you browse to .../image):

Index: modules/image/image.module
 ===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/image/image.module,v
retrieving revision 1.107
diff -u -r1.107 image.module
--- modules/image/image.module	7 Mar 2004 12:52:19 -0000	1.107
+++ modules/image/image.module	10 Apr 2004 01:43:02 -0000
@@ -66,6 +66,22 @@
 }
 
 /**
+ * Image block
+ */
+function image_block($op = "list", $delta = 0) {
+    // listing of blocks, such as on the admin/system/block page
+    if ($op == "list") {
+	$blocks[0]["info"] = t("Image Gallery");
+    } else {
+	// our block content
+	$blocks["subject"] = t(variable_get("image_block_title", "Image Galleries"));
+	$albums = taxonomy_get_children($tid, variable_get("image_nav_vocabulary", ""));
+	$blocks["content"] = theme_image_block($albums);
+    }
+    return $blocks;
+}
+
+/**
  * Node descriptor
  */
 function image_node_name() {
@@ -152,6 +168,8 @@
 
   $output .= form_select(t("Disable Image Caching"), "image_random_suffix",  \
	variable_get("image_random_suffix", "0"), array("0" => "disabled",    \
	"1" => "enabled"), t("Enabling this will add random parameters "      \
	. "to image URIs which will prevent the browser from caching."));
 
+  $output .= form_textfield(t("Title for image block"), "image_block_title", \
        variable_get("image_block_title", "Image Galleries"), 20, 80,         \
	t("The title to display in the image block, if enabled"));
+
   return $output;
 }
 
@@ -1401,6 +1419,18 @@
   return '<hr>' . theme("pager", $tags, $limit, $element, $attributes);
 }
 
+/**
+ * Theme function to render the image block contents
+ */
+function theme_image_block($albums) {
+    $output = "<div class=\"menu\"><ul>";
+    foreach ($albums as $album) {
+	$output .= "<li class=\"collapsed\">" . l($album->name, "image/tid/"  \
		   . $album->tid) . "</li>";
+    }
+    $output .= "</ul></div>";
+    return $output;
+}
+
 /****
 ***** admin function and friends
 ****/

A nice enhancement would be to allow control over the depth of taxonomy terms to include (that is, display child galleries in the block, to a user-defined level).

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