[wp-trac] [WordPress Trac] #32832: Menu Customizer: Hook tracking

[WordPress Trac]

#32832: Menu Customizer: Hook tracking
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 Reporter:  celloexpressions  |      Owner:
     Type:  task (blessed)    |     Status:  new
 Priority:  normal            |  Milestone:  4.3
Component:  Customize         |    Version:  trunk
 Severity:  normal            |   Keywords:  needs-patch
  Focuses:                    |
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 This ticket is to track remaining hook needs within Menus in the
 Customizer, to alleviate confusion, and a slew of duplicate tickets being
 opened to address various issues that sound different but are actually the
 same.

 Here is a summary of all places in the menus UI that should be hook-able,
 and the suggested approach to allowing devs to leverage these:
 - Menus Panel view - menu list, add new menu -> Customizer API
 (`add_section`)
 - Pre/post-menu name -> Customizer API (`add_control`)
 - Pre/post menu control/theme locations -> Customizer API (`add_control`)
 - Pre/post auto_add control -> Customizer API (needs to be re-split into a
 separate control) (`add_control`)
 - Screen Options -> existing filter `manage_nav-menus_columns`, should
 scope to Customizer when using, likely also requires some css when adding
 options
 - Menus help text -> Customizer API (`get_panel`, can also add to sections
 or elsewhere as needed)
 - Menu Locations section -> Customizer API (`add_control`)
 - Available items panel -> use `show_in_nav_menus` to show/hide post
 types/taxonomies, hooks to add custom sections (after Links or at bottom)
 handled in #32708
 - Menu item forms -> API or action to add custom options between
 description and original links (also needs support for saving the data as
 post meta), use CSS & screen options to hide core UI (to do). See #18584
 (and at least 5 duplicate tickets linked there). This is the primary thing
 that this ticket needs to address, and @westonruter has started thinking
 about implementation approaches.

 Current tasks remaining for implementing the above plan:
 - Separate the auto-add checkbox out from the menu control so that it can
 be removed or things added before/after it (this ticket)
 - Hooks for extending the available menu items panel (#32708)
 - Hooks/API for extending menu item controls/forms (this ticket)

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Ticket URL: <https://core.trac.wordpress.org/ticket/32832>
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