List of Drupal 6.0 Core "Themable Hooks"

Here is a list of the themable hooks registered by Drupal 6.0 core modules and drupal_common_theme() in common.inc:

admin_block admin_block_content admin_page aggregator_block_item aggregator_categorize_items aggregator_feed_source aggregator_item aggregator_page_opml aggregator_page_rss aggregator_summary_item aggregator_summary_items aggregator_wrapper block block_admin_display_form blocks book_admin_table book_all_books_block book_export_html book_navigation book_node_export_html book_title_link box breadcrumb button checkbox checkboxes closure color_scheme_form comment comment_admin_overview comment_block comment_controls comment_flat_collapsed comment_flat_expanded comment_folded comment_post_forbidden comment_preview comment_submitted comment_thread_collapsed comment_thread_expanded comment_view comment_wrapper date dblog_filters feed_icon fieldset file filter_admin_order filter_admin_overview filter_tips filter_tips_more_info form form_element forum_icon forum_list forums forum_submitted forum_topic_list forum_topic_navigation help hidden image image_button indentation install_page item item_list links locale_admin_manage_screen locale_languages_overview_form maintenance_page mark markup menu_item menu_item_link menu_local_task menu_local_tasks menu_overview_form menu_tree more_help_link more_link node node_add_list node_admin_nodes node_filter_form node_filters node_form node_list node_log_message node_preview node_search_admin node_submitted page pager pager_first pager_last pager_link pager_next pager_previous password password_confirm placeholder poll_bar poll_choices poll_results poll_vote profile_admin_overview profile_block profile_listing profile_wrapper progress_bar radio radios search_block_form search_result search_results search_theme_form select status_messages status_report submenu submit syslog_format system_admin_by_module system_modules system_modules_uninstall system_powered_by system_theme_select_form system_themes_form table table_select_header_cell tablesort_indicator task_list taxonomy_overview_terms taxonomy_overview_vocabularies taxonomy_term_page taxonomy_term_select textarea textfield token trigger_display update_page update_report update_settings update_version upload_attachments upload_form_current upload_form_new user_admin_account user_admin_new_role user_admin_perm user_filter_form user_filters user_list username user_picture user_profile user_profile_category user_profile_item user_signature xml_icon

which I got by adding drupal_common_theme() to the output of:

for i in `grep 'function[ ]*.*_theme[ ]*(' modules/*/*.module | cut -d: -f1 | uniq | grep module | cut -d/ -f2`; do grep -A 99999 $i'_theme(' modules/$i/$i.module | grep -B 99999 -m 1 '^}' done

Here is an alternative list of the hard-coded "themable hooks" used by Drupal 6.0 core:

admin_block admin_block_content admin_page aggregator_block_item aggregator_categorize_items aggregator_feed_source aggregator_item aggregator_page_opml aggregator_page_rss aggregator_summary_item aggregator_summary_items aggregator_wrapper block block_admin_display_form blocks book_admin_table book_all_books_block book_export_html book_navigation book_node_export_html book_title_link box breadcrumb button checkbox checkboxes closure color_scheme_form comment comment_admin_overview comment_block comment_controls comment_flat_collapsed comment_flat_expanded comment_folded comment_post_forbidden comment_submitted comment_thread_collapsed comment_thread_expanded comment_view comment_wrapper date dblog_filters feed_icon fieldset file filter_admin_order filter_admin_overview filter_tips filter_tips_more_info form form_element forum_icon forum_list forums forum_submitted forum_topic_list forum_topic_navigation get_registry get_setting get_settings help hidden image image_button indentation install_page item item_list links locale_languages_overview_form maintenance_page mark markup menu_item menu_item_link menu_local_task menu_local_tasks menu_overview_form menu_tree more_help_link more_link node node_add_list node_admin_nodes node_filter_form node_filters node_form node_list node_log_message node_preview node_search_admin node_submitted page pager pager_first pager_last pager_link pager_next pager_previous password password_confirm placeholder poll_bar poll_bar_block poll_choices poll_results poll_results_block poll_vote profile_admin_overview profile_block profile_listing profile_wrapper progress_bar radio radios render_template search_block_form search_result search_results search_theme_form select status_messages status_report submenu submit syslog_format system_admin_by_module system_modules system_modules_uninstall system_powered_by system_theme_select_form system_themes_form table table_select_header_cell tablesort_indicator task_list taxonomy_overview_terms taxonomy_overview_vocabularies taxonomy_term_page taxonomy_term_select textarea textfield token trigger_display update_page update_report update_version upload_attachments upload_form_current upload_form_new user_admin_account user_admin_new_role user_admin_perm user_filter_form user_filters user_list username user_picture user_profile user_profile_category user_profile_item user_signature xml_icon

which was found by combining:

the list of hardcoded calls to theme('somestring', ...)
the list of functions named theme_something()
the list of .tpl.php files

The command line I used is here for inspection:

(find \! -name "*.js" | xargs grep "\\<theme[ ]*([ ]*['\"]" | sed -e "s/.*\\<theme[ ]*([ ]*['\"]$[^'\"]*$['\"].*/\1/g"; find | xargs grep '\<function[ ]*theme_' | sed -e 's/.*\<function[ ]*theme_$[^(]*$[ ]*(.*/\1/g';find . -name "*.tpl.php" | sed -e 's/.*\///g' -e 's/.tpl.php$//' -e 's/-/_/g') | sort -u