[19.0][ADD] web_x2many_list_scroll: lists inside forms scroll within a set number of rows

[alan196]

New module web_x2many_list_scroll.

A list of lines inside a form (order lines, invoice lines...) stretches the page as it grows: past a screen of rows the column titles and the row of totals are out of sight. With this module the list scrolls by itself within a set number of rows, in both directions, with its header and its totals staying in sight. The pager of the list keeps working as before.

• Setting in General Settings ▸ Lists in Forms: the visible rows (system parameter web_x2many_list_scroll.rows, 0 = off), read once per session.
• Per view: options="{'scroll_rows': 15}" on the x2many field wins over the setting; 0 switches it off for that list.
• The height is the number of rows times the row height and the header height measured on the rendered list, so it follows the font, the density and the device (rows are taller on touch screens).
• Inside a form Odoo flattens the list header to z-index: 0; the module lifts header and footer above the widgets of the rows rolling under them (tags, badges, toggles), tunable through --o-x2many-list-scroll-zindex.
• Tests: hoot (setting, per-view override, off with zero, measured heights, sticky header) and Python (parameter to session).

🤖 Generated with Claude Code

https://claude.ai/code/session_01U2vJWgfX8LRMaFnszPEhC5