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list.opa
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list.opa
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/*
Copyright © 2011 MLstate
This file is part of OPA.
OPA is free software: you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License, version 3, as published by
the Free Software Foundation.
OPA is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for
more details.
You should have received a copy of the GNU Affero General Public License
along with OPA. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Elvis Lists
*
* @category UI
* @author David Rajchenbach-Teller, 2011
* @destination PUBLIC
* @stability EXPERIMENTAL
*/
/**
* {1 Lists}
*
* Lists, menus, tabs...
*/
/**
* {1 Theming}
*
* The list always has classes "mlstate", "elvis", "list".
*/
type EList.options('key) =
{
items: list(('key, Elvis.elvis(Elvis.masked, Elvis.masked)))
}
type EList.sources =
{
}
@abstract type EList.implementation('key) = {
dom: dom
id: string
current_display: Client.reference(Elvis.theme -> {xhtml: xhtml dom:dom})
current_theme: Client.reference(option(Elvis.theme))
current_items: Client.reference(list(('key, Elvis.elvis(Elvis.masked, Elvis.masked))))
}
type EList.elvis('key) = Elvis.elvis(EList.sources, EList.implementation('key))
EList =
{{
/**
* {1 Constructors}
*/
empty(): EList.elvis('a) =
make({items = []})
simple(items: list(Elvis.elvis(Elvis.masked, Elvis.masked))): EList.elvis(int) =
make({items = List.map((item -> (Random.int(1000000), item)), items)})
make(options: EList.options('a)): EList.elvis('a) =
(
id = "elist_{Random.string(32)}"
dom = Dom.select_id(id)
display = make_display(options.items, id)
current_display = Client_reference.create(display)
current_theme = Client_reference.create({none})
current_items = Client_reference.create(options.items)
display(theme) =
(
do Client_reference.set(current_theme, {some = theme})
Client_reference.get(current_display)(theme)
)
implementation = (~{dom id current_display current_theme current_items})
Elvis.make({}, implementation, display)
)
default_options =
{
items = []
}
/**
* {1 Accessors}
*/
/**
* Change the items in this list. Redisplay the elvis if necessary.
*/
set_items(list: EList.elvis('a), items: list(('a, Elvis.elvis(Elvis.masked, Elvis.masked)))): void =
(
implem = (Elvis.implem(list))
//1. Rebuild function [display], so that further displays of this elvis are possible
current_display = implem.current_display
id = implem.id
display = make_display(items, id)
do Client_reference.set(current_display, display)
//2. Update browser UI if the elvis is currently displayed
current_theme = implem.current_theme
do match Client_reference.get(current_theme) with
| {none} -> void //The elvis is not displayed for the moment
| ~{some}->
target = Dom.resolve(implem.dom)
content = display(some).dom
_ = Dom.put_replace(target, content)
void
//3. Update reference
do Client_reference.set(implem.current_items, items)
void
)
set_items_nokey(list: EList.elvis('a), items: list(Elvis.elvis(Elvis.masked, Elvis.masked))): void =
(
set_items(list, List.map(item -> (Random.int(1000000), item), items))
)
/**
* Add an item to the list, as first element
*
* Note: Behavior is undefined if the item is already displayed somewhere
*/
add_item(list: EList.elvis('a), key: 'a, item: Elvis.elvis(Elvis.masked, Elvis.masked)): void =
(
implem = (Elvis.implem(list))
do set_items(list, [(key, item) | Client_reference.get(implem.current_items)])
void
)
/**
* Remove an item from the list
*/
remove_item(list: EList.elvis('a), key:'a): void =
(
implem = (Elvis.implem(list))
do set_items(list, List.remove_p(((current_key, _) -> current_key == key), Client_reference.get(implem.current_items)))
void
)
@private make_display(items:list(('a, Elvis.elvis(Elvis.masked, Elvis.masked))), id:string) =
(
display(theme) =
(
theme_classes= Elvis.Theme.get_classes(theme)
xhtml =
<ul id={id} class="{theme_classes} mlstate elvis list">
{
List.map((child -> <li class="list_child">{Elvis.for_display_in_theme(child.f2, theme)}</li>), items)
}
</ul>
dom = Dom.of_xhtml(xhtml)
~{xhtml dom}
)
display
)
}}