修改設定

研究 XPI 快速設定精靈時的東西，先丟出來。

<script type="application/x-javascript">
<![CDATA[
	const HOMEPAGE = "http://leolo.ath.cx/~bobchao/";
	const PROXY_AUTO_CONFIG = "http://proxy.nsysu.edu.tw/proxy.pac";
	
	const prefInt = 0;
	const prefBool = 1;
	const prefStr = 2;
	
	const nsISupportsString = Components.interfaces.nsISupportsString;
	const nsSupportsString_CONTRACTID = "@mozilla.org/supports-string;1";
	const nsIPrefService = Components.interfaces.nsIPrefService;
	const nsPrefService_CONTRACTID = "@mozilla.org/preferences-service;1";
	
	const gPrefService = Components.classes[nsPrefService_CONTRACTID].getService(nsIPrefService);
	const gPrefBranch = PrefService.getBranch(null).QueryInterface(Components.interfaces.nsIPrefBranchInternal);
	
	function doSetProxy(){
		doModiftPrefs(prefStr, "network.proxy.autoconfig_url", PROXY_AUTO_CONFIG);
		doModiftPrefs(prefInt, "network.proxy.type", 2);
	}
	
	function doSetHomepage(){
		doModiftPrefs(prefStr, "browser.startup.homepage", HOMEPAGE);
	}
		
	function doModiftPrefs(type, entry, value){
		try {
			switch (type){
				case 0:
					gPrefBranch.setIntPref(entry, value);
					break;
				case 1:
					gPrefBranch.setBoolPref(entry, value);
					break;
				case 2:
					var supportsString = Components.classes[nsSupportsString_CONTRACTID].createInstance(nsISupportsString);
					supportsString.data = value;
						gPrefBranch.setComplexValue(entry, nsISupportsString, supportsString);
					break;
			}
		}
		catch(e){ alert(e); } //還不知道要怎麼處理
	}
]]>
</script>