| B2G/gaia/apps/system$ grep -rn imgur.com js/layout_manager.js:21: *  js/homescreen_window.js:9: *  js/attention_window.js:11: * <a href="http://i.imgur.com/4O1Frs3.png" target="_blank"> js/attention_window.js:12: * <img src="http://i.imgur.com/4O1Frs3.png"></img> js/app_window_factory.js:21: *  js/app_window.js:51: *  js/app_window.js:1773: *  js/app_transition_controller.js:21: *  js/app_transition_controller.js:24: *  Binary file js/.app_window_manager.js.swp matches js/activity_window.js:12: *  js/orientation_manager.js:20: *  js/app_window_manager.js:445: *  js/app_window_manager.js:883: *  |
log顺序：
system app:
app.js 整个system app的入口，负责将所有application core需要的东西准备好。core.js启动核心bootstrap模块.
core.js 用于实例化及启动核心模块的bootstrap 模块。api的处理都在这里。
* This is the bootstrap module of the system app. * It is responsible to instantiate and start the other core modules * and sub systems per API.
launcher.js 负责读取所有启动相关的配置，并请求其他launcher通过这些配置在正确的时间launch。就是ftu, hsc wallpaper等的启动
applications.js
app_chrome.js
app_window_factory.js 负责APP的启动launch，监听“webapps-launch,,,”等属性
http://i.imgur.com/ZyMcgft.png
app_window.js 用于app窗口的管理，如改变大小方向，设置背景，切换窗口（是否处于活跃active状态）等等。
http://i.imgur.com/ELuEopw.png
[appWindow Life cycle state machine](http://i.imgur.com/ELuEopw.png)
[AppWindow resize flow chart](http://i.imgur.com/bUMm4VM.png)
app_window_manager.js 控制app窗口的关闭和打开，传递改变大小屏幕方向等布局请求给appwindow 实例（也就是一个个APP窗口？）即app窗口管理。
匹配相应APP
http://i.imgur.com/8qsOh1W.png
){kind=link}
app_window_manager.js:445: * 
http://i.imgur.com/VrlkUXM.png
app_window_manager.js:883: * 
activity_window.js
http://i.imgur.com/4O1Frs3.png
homescreen_window.js 通过给定的manifesrURL创建homescreen 实例，谁给的呢？
http://i.imgur.com/vLA8YEN.png
所以，所有app都通过new HomeScreenWindow(url)打开的，包括hsc app.
HomescreenWindow creates a instance of homescreen by give manifestURL.
*
homescreen_window_manager.js 管理hsc的显示与隐藏。
homescreen_launcher.js 负责启动hsc 窗口并且保证其单例模式
attention_window.js
http://i.imgur.com/4O1Frs3.png
layout_manager.js 控制布局格式
http://i.imgur.com/bUMm4VM.png
app_transition_controller.js
app_transition_controller.js:21: * 
js/app_transition_controller.js:24: * 
orientation_manager.js:20: * 
