mirror of
https://we.phorge.it/source/phorge.git
synced 2024-11-23 07:12:41 +01:00
e768a633b7
Summary: Ref T6953. Test Plan: `arc lint` Reviewers: epriestley, #blessed_reviewers Reviewed By: epriestley, #blessed_reviewers Subscribers: Korvin, epriestley Maniphest Tasks: T6953 Differential Revision: https://secure.phabricator.com/D11376
105 lines
3.3 KiB
JavaScript
105 lines
3.3 KiB
JavaScript
/**
|
|
* Initialize a client-side view from the server. The main idea here is to
|
|
* give server-side views a way to integrate with client-side views.
|
|
*
|
|
* The idea is that a client-side view will have an accompanying
|
|
* thin server-side component. The server-side component renders a placeholder
|
|
* element in the document, and then it will invoke this behavior to initialize
|
|
* the view into the placeholder.
|
|
*
|
|
* Because server-side views may be nested, we need to add complexity to
|
|
* handle nesting properly.
|
|
*
|
|
* Assuming a server-side view design that looks like hierarchical views,
|
|
* we have to handle structures like
|
|
*
|
|
* <server:component>
|
|
* <client:component id="1">
|
|
* <server:component>
|
|
* <client:component id="2">
|
|
* </client:component>
|
|
* </server:component>
|
|
* </client:component>
|
|
* </server:component>
|
|
*
|
|
* This leads to a problem: Client component 1 needs to initialize the behavior
|
|
* with its children, which includes client component 2. So client component
|
|
* 2 must be rendered first. When client component 2 is rendered, it will also
|
|
* initialize a copy of this behavior. If behaviors are run in the order they
|
|
* are initialized, the child component will run before the parent, and its
|
|
* placeholder won't exist yet.
|
|
*
|
|
* To solve this problem, placeholder behaviors are initialized with the token
|
|
* of a containing view that must be rendered first (if any) and a token
|
|
* representing it for its own children to depend on. This means the server code
|
|
* is free to call initBehavior in any order.
|
|
*
|
|
* In Phabricator, AphrontJavelinView demonstrates how to handle this correctly.
|
|
*
|
|
* config: {
|
|
* id: Node id to replace.
|
|
* view: class of view, without the 'JX.' prefix.
|
|
* params: view parameters
|
|
* children: messy and loud, cute when drunk
|
|
* trigger_id: id of containing view that must be rendered first
|
|
* }
|
|
*
|
|
* @provides javelin-behavior-view-placeholder
|
|
* @requires javelin-behavior
|
|
* javelin-dom
|
|
* javelin-view-renderer
|
|
* javelin-install
|
|
*/
|
|
|
|
|
|
|
|
JX.behavior('view-placeholder', function(config) {
|
|
JX.ViewPlaceholder.register(config.trigger_id, config.id, function() {
|
|
var replace = JX.$(config.id);
|
|
|
|
var children = config.children;
|
|
if (typeof children === 'string') {
|
|
children = JX.$H(children);
|
|
}
|
|
|
|
var view = new JX[config.view](config.params, children);
|
|
var rendered = JX.ViewRenderer.render(view);
|
|
|
|
JX.DOM.replace(replace, rendered);
|
|
});
|
|
});
|
|
|
|
JX.install('ViewPlaceholder', {
|
|
statics: {
|
|
register: function(wait_on_token, token, cb) {
|
|
var ready_q = [];
|
|
var waiting;
|
|
|
|
if (!wait_on_token || wait_on_token in JX.ViewPlaceholder.ready) {
|
|
ready_q.push({token: token, cb: cb});
|
|
} else {
|
|
waiting = JX.ViewPlaceholder.waiting;
|
|
waiting[wait_on_token] = waiting[wait_on_token] || [];
|
|
waiting[wait_on_token].push({token: token, cb: cb});
|
|
}
|
|
|
|
while(ready_q.length) {
|
|
var ready = ready_q.shift();
|
|
|
|
waiting = JX.ViewPlaceholder.waiting[ready.token];
|
|
if (waiting) {
|
|
for (var ii = 0; ii < waiting.length; ii++) {
|
|
ready_q.push(waiting[ii]);
|
|
}
|
|
delete JX.ViewPlaceholder.waiting[ready.token];
|
|
}
|
|
ready.cb();
|
|
|
|
JX.ViewPlaceholder.ready[token] = true;
|
|
}
|
|
|
|
},
|
|
ready: {},
|
|
waiting: {}
|
|
}
|
|
});
|