diff options
Diffstat (limited to 'addon-sdk/source/lib/framescript/content.jsm')
-rw-r--r-- | addon-sdk/source/lib/framescript/content.jsm | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/addon-sdk/source/lib/framescript/content.jsm b/addon-sdk/source/lib/framescript/content.jsm new file mode 100644 index 000000000..eaee26be3 --- /dev/null +++ b/addon-sdk/source/lib/framescript/content.jsm @@ -0,0 +1,94 @@ +/* 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 { utils: Cu, classes: Cc, interfaces: Ci } = Components; +const { Services } = Cu.import('resource://gre/modules/Services.jsm'); + +const cpmm = Cc['@mozilla.org/childprocessmessagemanager;1']. + getService(Ci.nsISyncMessageSender); + +this.EXPORTED_SYMBOLS = ["registerContentFrame"]; + +// This may be an overriden version of the SDK so use the PATH as a key for the +// initial messages before we have a loaderID. +const PATH = __URI__.replace('framescript/content.jsm', ''); + +const { Loader } = Cu.import(PATH + 'toolkit/loader.js', {}); + +// one Loader instance per addon (per @loader/options to be precise) +var addons = new Map(); + +// Tell the parent that a new process is ready +cpmm.sendAsyncMessage('sdk/remote/process/start', { + modulePath: PATH +}); + +// Load a child process module loader with the given loader options +cpmm.addMessageListener('sdk/remote/process/load', ({ data: { modulePath, loaderID, options, reason } }) => { + if (modulePath != PATH) + return; + + // During startup races can mean we get a second load message + if (addons.has(loaderID)) + return; + + options.waiveInterposition = true; + + let loader = Loader.Loader(options); + let addon = { + loader, + require: Loader.Require(loader, { id: 'LoaderHelper' }), + } + addons.set(loaderID, addon); + + cpmm.sendAsyncMessage('sdk/remote/process/attach', { + loaderID, + processID: Services.appinfo.processID, + isRemote: Services.appinfo.processType != Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT + }); + + addon.child = addon.require('sdk/remote/child'); + + for (let contentFrame of frames.values()) + addon.child.registerContentFrame(contentFrame); +}); + +// Unload a child process loader +cpmm.addMessageListener('sdk/remote/process/unload', ({ data: { loaderID, reason } }) => { + if (!addons.has(loaderID)) + return; + + let addon = addons.get(loaderID); + Loader.unload(addon.loader, reason); + + // We want to drop the reference to the loader but never allow creating a new + // loader with the same ID + addons.set(loaderID, {}); +}) + + +var frames = new Set(); + +this.registerContentFrame = contentFrame => { + contentFrame.addEventListener("unload", () => { + unregisterContentFrame(contentFrame); + }, false); + + frames.add(contentFrame); + + for (let addon of addons.values()) { + if ("child" in addon) + addon.child.registerContentFrame(contentFrame); + } +}; + +function unregisterContentFrame(contentFrame) { + frames.delete(contentFrame); + + for (let addon of addons.values()) { + if ("child" in addon) + addon.child.unregisterContentFrame(contentFrame); + } +} |