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      1 # Link hinting
      2 ## Description
      3 This script allows a user to follow link by pressing Alt+number of the
      4 link. Numbers are never over 5, to ease finger access.  
      5 Deploy it into ~/.surf/script.js
      6 
      7 *Needs some work on the script to permi buttons and textinput
      8 following...*
      9 
     10 ## Usage
     11 Press `Alt`, then the number of the link, and finally `f`to follow the
     12 link, only with left hand.
     13 
     14 ## Author
     15 Christian hahn <ch radamanthys de>
     16 
     17 [dev mailing list](//lists.suckless.org/dev/1009/5996.html)
     18 
     19 
     20 ## Code
     21 
     22 
     23 	// easy links for surf
     24 	// christian hahn <ch radamanthys de>, sep 2010
     25 
     26 	testcomplete = function() {
     27 		if(document.readyState=="complete") {
     28 			run(); return;
     29 		}
     30 		window.setTimeout("testcomplete()",200);
     31 	}
     32 	testcomplete();
     33 
     34 	run=function() {
     35 		// config , any css
     36 		var modkey      = 18;  //ctrl=17, alt=18
     37 		var cancelkey   = 67;  // c
     38 		var newwinkey   = 84;  // t
     39 		var openkey     = 70;  // f
     40 		var label_style = {"color":"black","fontSize":"10px","backgroundColor":"#27FF27","fontWeight":"normal","margin":"0px","padding":"0px","position":"absolute","zIndex":99};
     41 		var hl_style    = {"backgroundColor":"#E3FF38","fontSize":"15px"};
     42 		var nr_base     = 5;   // >=10 : normal integer,
     43 
     44 		// globals
     45 		var ankers     = document.getElementsByTagName("a");
     46 		var labels     = new Object();
     47 		var ui_visible = false;
     48 		var input      = "";
     49 
     50 		// functions
     51 		hl=function(t) {
     52 			for(var id in labels) {
     53 				if (t && id.match("^"+t)==t)
     54 					for(var s in hl_style)
     55 						labels[id].rep.style[s]=hl_style[s];
     56 				else
     57 					for(var s in label_style)
     58 						labels[id].rep.style[s]=label_style[s];
     59 			}
     60 		}
     61 		open_link=function(id, new_win) {
     62 			try {
     63 				var a = labels[input].a;
     64 				if(a && !new_win) window.location.href=a.href;
     65 				if(a && new_win)  window.open(a.href,a.href);
     66 			} catch (e) {}
     67 		}
     68 		set_ui=function(s) {
     69 			var pos = "static";
     70 			ui_visible = true;
     71 			if(s == "hidden") {
     72 				ui_visible = false;
     73 				pos = "absolute";
     74 				input="";
     75 			}
     76 			for(var id in labels) {
     77 				labels[id].rep.style.visibility=s;
     78 				labels[id].rep.style.position=pos;
     79 			}
     80 		}
     81 		base=function(n, b) { 
     82 			if(b>=10) return n.toString();
     83 			var res = new Array();
     84 			while(n) {
     85 				res.push( (n%b +1).toString() )
     86 				n=parseInt(n/b);
     87 			}
     88 			return res.reverse().join("");
     89 		}
     90 
     91 		// main
     92 		// create labels
     93 		for (var i=0; i<ankers.length; i++) {
     94 			var a = ankers[i];
     95 			if (!a.href) continue;
     96 			var b = base(i+1,nr_base);
     97 			var d = document.createElement("span");
     98 			d.style.visibility="hidden";
     99 			d.innerHTML=b;
    100 			for(var s in label_style)
    101 				d.style[s]=label_style[s];
    102 			labels[b]={"a":a, "rep":d};
    103 			a.parentNode.insertBefore(d, a.nextSibling);
    104 		}
    105 
    106 		// set key handler   
    107 		window.onkeydown=function(e) {
    108 			if (e.keyCode == modkey) {
    109 				set_ui("visible");
    110 			}
    111 		}
    112 		window.onkeyup=function(e) {
    113 			if (e.keyCode == modkey ) {
    114 				open_link(input);
    115 				set_ui("hidden");
    116 				hl(input);
    117 			} else if (ui_visible) {
    118 				if(e.keyCode == newwinkey) {
    119 					open_link(input, true);
    120 					set_ui("hidden");
    121 				} else if(e.keyCode == cancelkey)
    122 					input="";
    123 				else if(e.keyCode == openkey) {
    124 					open_link(input);
    125 					set_ui("hidden");
    126 				} else
    127 					input += String.fromCharCode(e.keyCode);
    128 				hl(input);
    129 			}
    130 		}
    131 	}
    132 
    133