ffos: 点击一个web app图标到完成相应进程并正常运行过程分析

ffos 上的app的启动过程分析：

TODO：

0.gecko 到gaia的应用框架，通路。

1.home screen 如何将消息传给b2g。

2.web app 与其他APP ，b2g都进行了哪些类型的交互。

0.gecko 到gaia的应用框架，通路。

(1)gaia, system app ,homescreen_window.js

(2)homescreen 应用，展示图标，并将点击的图标与实际应用链接起来。显示窗口？？

Log 分析：

gecko/dom/ipc/extensions.js:7:dump("######################## extensions.js loaded\n");

gecko/b2g/components/SystemAppProxy.jsm:128: dump('XXX FIXME : Dispatch a ' + type + ': ' + details.type + "\n");

toolkit/mozapps/extensions/content/extensions.xul:27: src="chrome://mozapps/content/extensions/extensions.js"/>

toolkit/mozapps/extensions/jar.mn:9:* content/mozapps/extensions/extensions.js (content/extensions.js)
dom/browser-element/BrowserElementParent.js:344: this._mm.loadFrameScript("chrome://global/content/extensions.js", true);

ffos: 点击一个web app图标到完成相应进程并正常运行过程分析

一。home screen 到 b2g 的load请求

加载好iframe window 等才调ContentParent::CreateBrowserOrApp() 创建应用。

homescreen app.js主要是负责app从图标到icon.launch()的作用。

window.js控制window里的情况，滚动等。

初步判断，home screen 进程收到js 传来的icon图标点击请求 icon.launch，b2g 调度webapps-launch, communication/Message/camera 进程有反应加载一些什么，b2g 将通道改变，重新生成新模板进程。

system app 的转发有吗？笨，system app 就是b2g。

ffos: 点击一个web app图标到完成相应进程并正常运行过程分析

communication

ffos: 点击一个web app图标到完成相应进程并正常运行过程分析

message

ffos: 点击一个web app图标到完成相应进程并正常运行过程分析

camera

ffos: 点击一个web app图标到完成相应进程并正常运行过程分析

//home screen app
I/GeckoDump( 5971): jslogpan, call -- // App launching --->
I/GeckoDump( 5971): jslogpan, call -- icon = e.detail.target.firstElementChild; --->
I/GeckoDump( 5971): jslogpan, call -- icon.launch(); --->

//b2g /system app
I/Gecko   (  179): XXX FIXME : Dispatch a webapps-launch: undefined

//communication app
I/Gecko   ( 1226): ###################################### forms.js loaded
I/Gecko   ( 1226): ###################################### BrowserElementCopyPaste.js loaded
I/Gecko   ( 1226): ############################### browserElementPanning.js loaded
I/Gecko   ( 1226): ######################## BrowserElementChildPreload.js loaded
I/Gecko   ( 1226): ######################## extensions.js loaded


W/Communications( 1226): [JavaScript Warning: "Property contained reference to invalid variable.  Error in parsing value for 'transition-delay'.  Falling back to 'initial'." {file: "app://communications.gaiamobile.org/shared/style/edit_mode.css" line: 14 column: 257 source: " visibility var(--transition-duration)"}]
W/Communications( 1226): [JavaScript Warning: "Property contained reference to invalid variable.  Error in parsing value for 'transition-duration'.  Falling back to 'initial'." {file: "app://communications.gaiamobile.org/shared/style/edit_mode.css" line: 14 column: 257 source: " visibility var(--transition-duration)"}]
W/Communications( 1226): [JavaScript Warning: "Property contained reference to invalid variable.  Error in parsing value for 'transition-property'.  Falling back to 'initial'." {file: "app://communications.gaiamobile.org/shared/style/edit_mode.css" line: 14 column: 257 source: " visibility var(--transition-duration)"}]
W/Communications( 1226): [JavaScript Warning: "Property contained reference to invalid variable.  Error in parsing value for 'transition-timing-function'.  Falling back to 'initial'." {file: "app://communications.gaiamobile.org/shared/style/edit_mode.css" line: 14 column: 257 source: " visibility var(--transition-duration)"}]


I/Gecko   (  179): XXX FIXME : Dispatch a mozChromeEvent: default-volume-channel-changed
I/Gecko   (  179): -*- ContactDB component: upgrade schema from: 0 to 20 called!


I/Communications( 1226): Content JS INFO: Idle event!!!. FB Migration about to start 
I/Communications( 1226):     at onidle (app://communications.gaiamobile.org/contacts/js/fb/datastore_migrator.js:293:5)
W/Communications( 1226): Content JS WARN: FB Migration: The database does not exist 
W/Communications( 1226):     at DatastoreMigration/DatastoreMigrator/openIndexedDB/req.onsuccess (app://communications.gaiamobile.org/contacts/js/fb/datastore_migrator.js:212:11)

问题，system app(b2g 如何表现)

如何与普通app 交互？

grep -rn "XXX FIXME : Dispatch a"
b2g/components/SystemAppProxy.jsm:128: dump('XXX FIXME : Dispatch a ' + type + ': ' + details.type + "\n");

普通app 到b2g的代理b2g/components/SystemAppProxy.jsm

极精简的文件。

gecko/b2g/..runapp.js SystemappProxy.jsm

gecko/b2g/chrome/content/runapp.js

gaia/..system app:

homescreen_launcher.js 启动hsc，

homescreen_window.js 对hsc窗口的一些设置

homescreen_window_manager.js 管理窗口的隐藏显示

applications.js app的信息，如安装列表等