WebOS程序原理

2024-02-25 17:08

文章标签 程序原理 webos

本文主要是介绍WebOS程序原理，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

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WebOS程序原理

Application Framework
From WebOS Internals
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todo: talk about the app framework!

Applications that come bundled on the device are located here.

root@castle:/usr/palm/applications# ls -lah
drwxr-xr-x   44 root     root         4.0k May 22 13:10 .
drwxr-xr-x    8 root     root         4.0k May 22 14:37 ..
drwxr-xr-x    6 root     root         4.0k Dec 31  1999 com.handson.app.nascar
drwxr-xr-x    6 root     root         4.0k Dec 31  1999 com.mobitv.app.sprinttv
--More--
root@castle:/usr/palm/applications#
Where as downloaded applications from the Palm app store are here.

root@castle:/var/usr/palm/applications# ls -lah
drwxr-xr-x   11 root     root         4.0k Jun 10 20:05 .
drwxr-xr-x    3 root     root         4.0k May 29 14:48 ..
drwxr-xr-x    7 root     root         4.0k Jun  6 19:53 com.accuweather.palm
drwxr-xr-x    6 root     root         4.0k Jun  6 13:12 com.flixster.app.movies
drwxr-xr-x    8 root     root         4.0k Jun  8 14:34 com.lumoslabs.speed-brain
drwxr-xr-x    6 root     root         4.0k Jun 10 20:05 com.motionapps.app.classic
drwxr-xr-x    5 root     root         4.0k Jun  6 11:49 com.palm.pandora
--More--
root@castle:/var/usr/palm/applications#
The applications use a standard MVC (Model, View, Controller) format.

//TODO : Use an existing application to explain framework

Native Applications
It is obvious to see that the Classic app is not purely JavaScript, and native code would have to be required. How did they pull it off? Quite simply; they used a browser plugin.

                //Setup the adapter
                sampleAdapterApp = document.createElement('object');
                sampleAdapterApp.type = 'application/x-motionapps-partsadapter';
                sampleAdapterApp.width = 320;
                sampleAdapterApp.height = 320;