Keyboard link hinting
Description
This script enables link hinting support to surf. Deploy it into ~/.surf/script.js.
Keybindings
^f (open link in current window)
^F (open link in new window)
^c (cancel hinting)
Azerty keyboards
Just replace like this to use &é"'(-è_çà as numbers :
"U+a0c3" : "0",
"U+0026" : "1",
"U+a9c3" : "2",
"U+0022" : "3",
"U+0027" : "4",
"U+0028" : "5",
"U+002d" : "6",
"U+a8c3" : "7",
"U+005f" : "8",
"U+a7c3" : "9",
Author
- The code was originally from chromium but was adapted by nibble(.ds(at)gmail(dot)com) to work with surf.
Code
/* based on chromium plugin code, adapted by Nibble<.gs@gmail.com> */
var hint_num_str = '';
var hint_elems = [];
var hint_open_in_new_tab = false;
var hint_enabled = false;
function hintMode(newtab){
hint_enabled = true;
if (newtab) {
hint_open_in_new_tab = true;
} else {
hint_open_in_new_tab = false;
}
setHints();
document.removeEventListener('keydown', initKeyBind, false);
document.addEventListener('keydown', hintHandler, false);
hint_num_str = '';
}
function hintHandler(e){
e.preventDefault(); //Stop Default Event
var pressedKey = get_key(e);
if (pressedKey == 'Enter') {
if (hint_num_str == '')
hint_num_str = '1';
judgeHintNum(Number(hint_num_str));
} else if (/[0-9]/.test(pressedKey) == false) {
removeHints();
} else {
hint_num_str += pressedKey;
var hint_num = Number(hint_num_str);
if (hint_num * 10 > hint_elems.length + 1) {
judgeHintNum(hint_num);
} else {
var hint_elem = hint_elems[hint_num - 1];
if (hint_elem != undefined && hint_elem.tagName.toLowerCase() == 'a') {
setHighlight(hint_elem, true);
}
}
}
}
function setHighlight(elem, is_active) {
if (is_active) {
var active_elem = document.body.querySelector('a[highlight=hint_active]');
if (active_elem != undefined)
active_elem.setAttribute('highlight', 'hint_elem');
elem.setAttribute('highlight', 'hint_active');
} else {
elem.setAttribute('highlight', 'hint_elem');
}
}
function setHintRules() {
if (document.styleSheets.length < 1) {
var style = document.createElement("style");
style.appendChild(document.createTextNode(""));
document.head.appendChild(style);
}
var ss = document.styleSheets[0];
ss.insertRule('a[highlight=hint_elem] {background-color: yellow}', 0);
ss.insertRule('a[highlight=hint_active] {background-color: lime}', 0);
}
function deleteHintRules() {
var ss = document.styleSheets[0];
ss.deleteRule(0);
ss.deleteRule(0);
}
function judgeHintNum(hint_num) {
var hint_elem = hint_elems[hint_num - 1];
if (hint_elem != undefined) {
execSelect(hint_elem);
} else {
removeHints();
}
}
function execSelect(elem) {
var tag_name = elem.tagName.toLowerCase();
var type = elem.type ? elem.type.toLowerCase() : "";
if (tag_name == 'a' && elem.href != '') {
setHighlight(elem, true);
// TODO: ajax, <select>
if (hint_open_in_new_tab)
window.open(elem.href);
else location.href=elem.href;
} else if (tag_name == 'input' && (type == "submit" || type == "button" || type == "reset")) {
elem.click();
} else if (tag_name == 'input' && (type == "radio" || type == "checkbox")) {
// TODO: toggle checkbox
elem.checked = !elem.checked;
} else if (tag_name == 'input' || tag_name == 'textarea') {
elem.focus();
elem.setSelectionRange(elem.value.length, elem.value.length);
}
removeHints();
}
function setHints() {
setHintRules();
var win_top = window.scrollY;
var win_bottom = win_top + window.innerHeight;
var win_left = window.scrollX;
var win_right = win_left + window.innerWidth;
// TODO: <area>
var elems = document.body.querySelectorAll('a, input:not([type=hidden]), textarea, select, button');
var div = document.createElement('div');
div.setAttribute('highlight', 'hints');
document.body.appendChild(div);
for (var i = 0; i < elems.length; i++) {
var elem = elems[i];
if (!isHintDisplay(elem))
continue;
var pos = elem.getBoundingClientRect();
var elem_top = win_top + pos.top;
var elem_bottom = win_top + pos.bottom;
var elem_left = win_left + pos.left;
var elem_right = win_left + pos.left;
if ( elem_bottom >= win_top && elem_top <= win_bottom) {
hint_elems.push(elem);
setHighlight(elem, false);
var span = document.createElement('span');
span.style.cssText = [
'left: ', elem_left, 'px;',
'top: ', elem_top, 'px;',
'position: absolute;',
'font-size: 13px;',
'background-color: ' + (hint_open_in_new_tab ? '#ff6600' : 'red') + ';',
'color: white;',
'font-weight: bold;',
'padding: 0px 1px;',
'z-index: 100000;'
].join('');
span.innerHTML = hint_elems.length;
div.appendChild(span);
if (elem.tagName.toLowerCase() == 'a') {
if (hint_elems.length == 1) {
setHighlight(elem, true);
} else {
setHighlight(elem, false);
}
}
}
}
}
function isHintDisplay(elem) {
var pos = elem.getBoundingClientRect();
return (pos.height != 0 && pos.width != 0);
}
function removeHints() {
if (!hint_enabled)
return;
hint_enabled = false;
deleteHintRules();
for (var i = 0; i < hint_elems.length; i++) {
hint_elems[i].removeAttribute('highlight');
}
hint_elems = [];
hint_num_str = '';
var div = document.body.querySelector('div[highlight=hints]');
if (div != undefined) {
document.body.removeChild(div);
}
document.removeEventListener('keydown', hintHandler, false);
document.addEventListener('keydown', initKeyBind, false);
}
function addKeyBind( key, func, eve ){
var pressedKey = get_key(eve);
if( pressedKey == key ){
eve.preventDefault(); //Stop Default Event
eval(func);
}
}
document.addEventListener( 'keydown', initKeyBind, false );
function initKeyBind(e){
var t = e.target;
if( t.nodeType == 1){
addKeyBind( 'C-f', 'hintMode()', e );
addKeyBind( 'C-F', 'hintMode(true)', e );
addKeyBind( 'C-c', 'removeHints()', e );
}
}
var keyId = {
"U+0008" : "BackSpace",
"U+0009" : "Tab",
"U+0018" : "Cancel",
"U+001B" : "Esc",
"U+0020" : "Space",
"U+0021" : "!",
"U+0022" : "\"",
"U+0023" : "#",
"U+0024" : "$",
"U+0026" : "&",
"U+0027" : "'",
"U+0028" : "(",
"U+0029" : ")",
"U+002A" : "*",
"U+002B" : "+",
"U+002C" : ",",
"U+002D" : "-",
"U+002E" : ".",
"U+002F" : "/",
"U+0030" : "0",
"U+0031" : "1",
"U+0032" : "2",
"U+0033" : "3",
"U+0034" : "4",
"U+0035" : "5",
"U+0036" : "6",
"U+0037" : "7",
"U+0038" : "8",
"U+0039" : "9",
"U+003A" : ":",
"U+003B" : ";",
"U+003C" : "<",
"U+003D" : "=",
"U+003E" : ">",
"U+003F" : "?",
"U+0040" : "@",
"U+0041" : "a",
"U+0042" : "b",
"U+0043" : "c",
"U+0044" : "d",
"U+0045" : "e",
"U+0046" : "f",
"U+0047" : "g",
"U+0048" : "h",
"U+0049" : "i",
"U+004A" : "j",
"U+004B" : "k",
"U+004C" : "l",
"U+004D" : "m",
"U+004E" : "n",
"U+004F" : "o",
"U+0050" : "p",
"U+0051" : "q",
"U+0052" : "r",
"U+0053" : "s",
"U+0054" : "t",
"U+0055" : "u",
"U+0056" : "v",
"U+0057" : "w",
"U+0058" : "x",
"U+0059" : "y",
"U+005A" : "z",
//"U+005B" : "[",
//"U+005C" : "\\",
//"U+005D" : "]",
"U+00DB" : "[",
"U+00DC" : "\\",
"U+00DD" : "]",
"U+005E" : "^",
"U+005F" : "_",
"U+0060" : "`",
"U+007B" : "{",
"U+007C" : "|",
"U+007D" : "}",
"U+007F" : "Delete",
"U+00A1" : "¡",
"U+0300" : "CombGrave",
"U+0300" : "CombAcute",
"U+0302" : "CombCircum",
"U+0303" : "CombTilde",
"U+0304" : "CombMacron",
"U+0306" : "CombBreve",
"U+0307" : "CombDot",
"U+0308" : "CombDiaer",
"U+030A" : "CombRing",
"U+030B" : "CombDblAcute",
"U+030C" : "CombCaron",
"U+0327" : "CombCedilla",
"U+0328" : "CombOgonek",
"U+0345" : "CombYpogeg",
"U+20AC" : "€",
"U+3099" : "CombVoice",
"U+309A" : "CombSVoice",
}
function get_key(evt){
var key = keyId[evt.keyIdentifier] || evt.keyIdentifier,
ctrl = evt.ctrlKey ? 'C-' : '',
meta = (evt.metaKey || evt.altKey) ? 'M-' : '',
shift = evt.shiftKey ? 'S-' : '';
if (evt.shiftKey){
if (/^[a-z]$/.test(key))
return ctrl+meta+key.toUpperCase();
if (/^[0-9]$/.test(key)) {
switch(key) {
// TODO
case "4":
key = "$";
break;
};
return key;
}
if (/^(Enter|Space|BackSpace|Tab|Esc|Home|End|Left|Right|Up|Down|PageUp|PageDown|F(\d\d?))$/.test(key))
return ctrl+meta+shift+key;
}
return ctrl+meta+key;
}