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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const { EventEmitter } = require('../events');
const { validateOptions, getTypeOf } = require('../api-utils');
const { URL } = require('../url');
const file = require('../file');
// map of property validations
const valid = {
contentURL: {
ok: function (value) {
try {
URL(value);
}
catch(e) {
return false;
}
return true;
},
msg: 'The `contentURL` option must be a valid URL.'
},
contentScriptFile: {
is: ['undefined', 'null', 'string', 'array'],
map: function(value) 'undefined' === getTypeOf(value) ? null : value,
ok: function(value) {
if (getTypeOf(value) === 'array') {
// Make sure every item is a local file URL.
return value.every(function (item) {
try {
return URL(item).scheme === 'resource'
}
catch(e) {
return false;
}
});
}
return true;
},
msg: 'The `contentScriptFile` option must be a local URL or an array of'
+ 'URLs.'
},
contentScript: {
is: ['undefined', 'null', 'string', 'array'],
map: function(value) 'undefined' === getTypeOf(value) ? null : value,
ok: function(value) 'array' !== getTypeOf(value) ? true :
value.every(function(item) 'string' === getTypeOf(item))
,
msg: 'The `contentScript` option must be a string or an array of strings.'
},
contentScriptWhen: {
is: ['string'],
ok: function(value) ['start', 'ready', 'end'].indexOf(value) >= 0,
map: function(value) {
return value || 'end';
},
msg: 'The `contentScriptWhen` option must be either "start", "ready" or "end".'
}
};
exports.validationAttributes = valid;
/**
* Shortcut function to validate property with validation.
* @param {Object|Number|String} suspect
* value to validate
* @param {Object} validation
* validation rule passed to `api-utils`
*/
function validate(suspect, validation) validateOptions(
{ $: suspect },
{ $: validation }
).$
function Allow(script) ({
get script() script,
set script(value) script = !!value
})
/**
* Trait is intended to be used in some composition. It provides set of core
* properties and bounded validations to them. Trait is useful for all the
* compositions providing high level APIs for interaction with content.
* Property changes emit `"propertyChange"` events on instances.
*/
const Loader = EventEmitter.compose({
/**
* Permissions for the content, with the following keys:
* @property {Object} [allow = { script: true }]
* @property {Boolean} [allow.script = true]
* Whether or not to execute script in the content. Defaults to true.
*/
get allow() this._allow || (this._allow = Allow(true)),
set allow(value) this.allow.script = value && value.script,
_allow: null,
/**
* The content to load. Either a string of HTML or a URL.
* @type {String}
*/
get contentURL() this._contentURL,
set contentURL(value) {
value = validate(value, valid.contentURL);
if (this._contentURL != value) {
this._emit('propertyChange', {
contentURL: this._contentURL = value
});
}
},
_contentURL: null,
/**
* When to load the content scripts.
* Possible values are "end" (default), which loads them once all page
* contents have been loaded, "ready", which loads them once DOM nodes are
* ready (ie like DOMContentLoaded event), and "start", which loads them once
* the `window` object for the page has been created, but before any scripts
* specified by the page have been loaded.
* Property change emits `propertyChange` event on instance with this key
* and new value.
* @type {'start'|'ready'|'end'}
*/
get contentScriptWhen() this._contentScriptWhen,
set contentScriptWhen(value) {
value = validate(value, valid.contentScriptWhen);
if (value !== this._contentScriptWhen) {
this._emit('propertyChange', {
contentScriptWhen: this._contentScriptWhen = value
});
}
},
_contentScriptWhen: 'end',
/**
* The URLs of content scripts.
* Property change emits `propertyChange` event on instance with this key
* and new value.
* @type {String[]}
*/
get contentScriptFile() this._contentScriptFile,
set contentScriptFile(value) {
value = validate(value, valid.contentScriptFile);
if (value != this._contentScriptFile) {
this._emit('propertyChange', {
contentScriptFile: this._contentScriptFile = value
});
}
},
_contentScriptFile: null,
/**
* The texts of content script.
* Property change emits `propertyChange` event on instance with this key
* and new value.
* @type {String|undefined}
*/
get contentScript() this._contentScript,
set contentScript(value) {
value = validate(value, valid.contentScript);
if (value != this._contentScript) {
this._emit('propertyChange', {
contentScript: this._contentScript = value
});
}
},
_contentScript: null
});
exports.Loader = Loader;
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