Firefox text/gemini

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From: news@zzo38computer.org.invalid

Subject: Firefox text/gemini

Date: Sat, 05 Mar 2022 09:42:23 -0800

Message-ID: <1646501357.bystand@zzo38computer.org>

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I made implementation of the Gemini file format in Firefox; however, I had not

implemented the Gemini protocol yet. It will still work with data: URIs, and

with local files and Gempub (if you associate the .gmi extension with the Gemini

format in the mimeTypes.rdf), and I guess also HTTP(S) (although I have not

tested its use with HTTP(S) so far).

I used the userChrome.js and added the following:

(function() {

var Conv=function() {

this.state=0;

this.in="";

this.out="<"+"HTML application=\"gemini-text\">";

};

var tohtml=function(s) {

return s.replace(/[<>'"&]/g,function(x){return "&#"+x.charCodeAt(0)+";";});

};

Conv.prototype.add=function(s) {

this.in+=s;

var i=this.in.indexOf("\n");

while(i>=0) {

this.addLine(this.in.slice(0,i));

this.in=this.in.slice(i+1);

i=this.in.indexOf("\n");

}

};

Conv.prototype.addLine=function(s) {

var i,z;

if(this.state==0) {

this.state=1;

if(s[0]=="#") this.out+="<"+"title>"+tohtml(s.slice(1))+"</title>\n";

}

if(this.state==3 && s) this.state=1;

if(this.state==1) {

if(s.slice(0,3)=="```") {

this.state=2;

this.out+="<pre>";

} else if(s[0]=="#") {

for(i=1;i<6 && s[i]==="#";i++);

this.out+="<h"+i+">"+tohtml(s.slice(i).trim())+"</h"+i+">";

this.state=3;

} else if(s[0]=="=" && s[1]==">") {

s=s.slice(2).trim();

i=s.indexOf(" ");

if(i>=0) z=s.slice(0,i),s=s.slice(i).trim(); else z=s;

this.out+="<"+"a href=\""+tohtml(z)+"\">"+tohtml(s)+"</a><br>\n";

} else {

this.out+=tohtml(s)+"<br>\n";

}

} else if(this.state==2) {

if(s.slice(0,3)=="```") {

this.state=1;

this.out+="</pre>\n";

} else {

this.out+=tohtml(s)+"\n";

}

}

};

Conv.prototype.read=function() {

var x=this.out;

this.out="";

return x;

};

var G=function(){};

var o=G.prototype={

classDescription: "_geminiFileFormat",

classID: Components.ID("{aac00a22-9c4c-11ec-a2da-002618745416}"),

contractID: "@mozilla.org/streamconv;1?from=text/gemini&to=*/*",

convert: function(stream,fromtype,totype,context) {

throw Cr.NS_ERROR_NOT_IMPLEMENTED;

},

asyncConvertData: function(fromtype,totype,listener,context) {

listener.QueryInterface(Ci.nsIStreamListener);

this.listener=listener;

this.offset=0;

this.pipe=Cc["@mozilla.org/pipe;1"].createInstance(Ci.nsIPipe);

this.pipe.init(false,false,0,0,null);

this.conv=new Conv();

},

getConvertedType: function(type,channel) {

if(type.indexOf(";")!=-1) return "text/html"+type.slice(type.indexOf(";"));

return "text/html";

},

onDataAvailable: function(request,context,stream,offset,count) {

let s=NetUtil.readInputStreamToString(stream,count,{});

this.conv.add(s);

let d=this.conv.read();

this.pipe.outputStream.write(d,d.length);

this.listener.onDataAvailable(request,context,this.pipe.inputStream,this.offset,d.length);

this.offset+=d.length;

},

onStartRequest: function(request,context) {

request.QueryInterface(Ci.nsIChannel);

request.contentType="text/html";

this.listener.onStartRequest(request,context);

},

onStopRequest: function(request,context,status) {

if(this.conv.in) {

this.conv.add("\n");

let d=this.conv.read();

this.pipe.outputStream.write(d,d.length);

this.listener.onDataAvailable(request,context,this.pipe.inputStream,this.offset,d.length);

}

this.listener.onStopRequest(request,context,status);

delete this.listener;

delete this.pipe;

delete this.conv;

},

QueryInterface: XPCOMUtils.generateQI([Ci.nsIStreamConverter,Ci.nsIStreamListener,Ci.nsIRequestObserver]),

};

var r=Components.manager.QueryInterface(Ci.nsIComponentRegistrar);

r.registerFactory(o.classID,o.classDescription,o.contractID,XPCOMUtils._getFactory(G));

})();

You must also add the appropriate entries into the mimeTypes.rdf file.

There may (probably) be some mistakes; please tell me if you had found any mistakes.

--

Don't laugh at the moon when it is day time in France.

Related

Children:

Re: Firefox text/gemini (by threeoh6000 <threeoh6000@news.eternal-september.org> on Fri, 15 Apr 2022 18:40:25 +0100)