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网络浏览器

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Revision as of 14:51, 28 March 2013 by T (talk | contribs) (translate 25%)

3DS网络浏览器是在2011年6月更新的功能(JPN/EUR/USA)

从网络浏览器的说明/帮助字段可知： 完全遵循 LGPL，OSS源代码可以从任天堂网站获得. 下载地址：[1]

3DS网络浏览器 Netfront Browser NX v1.0 基于 WebKit 引擎。

3DS网络浏览器可以存储 64 个书签。

User-agent 示例：

  • Mozilla/5.0 (Nintendo 3DS; U; ; fr) Version/1.7412.EU for a EUR/fr Nintendo 3DS
  • Mozilla/5.0 (Nintendo 3DS; U; ; en) Version/1.7455.US for a USA/en Nintendo 3DS
  • 版本标号仅为示例...


Web标准

  • HTML 4.01
  • HTML 5 ( HTML5Test.com得分120/400)
  • XHTML 1.1
  • CSS 1
  • CSS 2.1
  • CSS 3 (一些功能不支持)
  • DOM Levels 1-3
  • ECMAScript (支持ECMA-262 第5版的一部分)
  • XMLHttpRequest Level 2
  • Canvas Element (一些功能不支持)

网络协议

  • HTTP 1.0
  • HTTP 1.1
  • SSLv3
  • TLS 1.0

图像格式

  • MPO
  • GIF
  • JPEG
  • PNG
  • BMP
  • ICO (不完全支持)

插件

不支持插件 (比如 Flash)

其他细节

  • Acid3 测试得分90/100。
  • 网络图像可以存储到 SD Card，然后用 Nintendo 3DS Camera 查看。
  • 存储到 SD Card 或者3DS本机内存的图像可以上传到博客或者其他使用以下HTML代码传图的网站。
<input type="file" />
  • HTML5Test.com说它支持拖拽缩放，但是实际上没做到。webkit已经有这样的代码，但是没有浏览器的接口。

Tips

User Agent

To detect if the user agent is Nintendo 3DS Browser : 

<script type="text/javascript">
    if (navigator.userAgent.indexOf('Nintendo 3DS') == -1) { //If the UserAgent is not "Nintendo 3DS"
        location.replace('http://www.3dbrew.org'); //Redirect to an other page
    }
</script>
  • You can check navigator.platform=="Nintendo 3DS" as well.

Scrolling

Scrolling can be altered by modifying document.body.scrollTop and document.body.scrollLeft. However, there are drawbacks related to working with these properties:

  • Both properties return 0 when accessed
  • Setting one property resets the other property's scroll position

In order to set both at the same time (without either resetting to 0), use window.scrollTo.

Events

Key Events

The following buttons trigger the onkeydown, onkeypress and onkeyup events:

Code Button
13 A
37 Left
38 Up
39 Right
40 Down

The events cannot have their default action cancelled. Other buttons do not trigger key events.

Touch/Mouse Events

onmousedown, onmouseup & onclick are all triggered by the browser. However, the onmousedown event doesn't trigger until you lift the stylus or you've held it on the screen for ~2 seconds—which is when text selection mode is activated—making it pretty much the same as onmouseup. The events cannot have their default action cancelled.

The onmousemove and common touch/gesture events are not supported.

Screen Resolution

The up screen resolution is 400×240. However, the viewable area in the browser is only 400×220.

The touch screen resolution is 320×240. However, the viewable area in the browser is only 320×212.

You can have a page span both screens. However, the browser will behave as if the bottom screen is the only active screen and the top screen is scrolled off. This is important when computing CSS coordinates. Items positioned from "bottom" will be positioned based on 220px and not the full 432px of both screens.

Using Both Screens

Generally the easiest way to accomplish the correct layout is to create HTML elements that "contain" the top and bottom screens. Here's an example: 

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="width=400">
    <style>
      body { margin: 0px; }
      #topscreen { width: 400px; height: 220px; overflow: hidden; }
      #bottomscreen { width: 320px; height: 212px; overflow: hidden; margin: 0 auto; }
    </style>
  </head>
  <body>
    <div id="topscreen">Top Screen</div>
    <div id="bottomscreen">Bottom Screen</div>
  </body>
</html>

This scheme allows the page to be easily manipulated through JavaScript. In order to have the window snap to the correct position, use the following JavaScript code: 

window.setInterval(function () {
    window.scrollTo(40, 220);  
}, 50);

This automatically resets the position if the user accidentally scrolls the page.

Example Sites

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