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// link follower for uzbl
// requires http://github.com/DuClare/uzbl/commit/6c11777067bdb8aac09bba78d54caea04f85e059
//
// first, it needs to be loaded before every time it is used.
// One way would be to use something like load_start_handler to send
// "act script link_follower.js"
//
// when script is loaded, it can be invoked with
// bind f* = js setHints("%s")
// bind f_ = js followLink("%s")
//
// based on follow_Numbers.js
//
// TODO: add classes to hinted elements
var uzblid = 'uzbl_hint';
var uzblclass = 'uzbl_hint_class'
var doc = document;
function elementPosition(el) {
var up = el.offsetTop;
var left = el.offsetLeft; var width = el.offsetWidth;
var height = el.offsetHeight;
while (el.offsetParent) {
el = el.offsetParent;
up += el.offsetTop;
left += el.offsetLeft;
}
return [up, left, width, height];
}
function generateHint(el, label) {
var hint = doc.createElement('div');
hint.setAttribute('class', uzblclass);
hint.innerText = label;
hint.style.display = 'inline';
hint.style.backgroundColor = '#B9FF00';
hint.style.border = '2px solid #4A6600';
hint.style.color = 'black';
hint.style.fontSize = '9px';
hint.style.fontWeight = 'bold';
hint.style.lineHeight = '9px';
hint.style.margin = '0px';
hint.style.padding = '1px';
hint.style.position = 'absolute';
hint.style.zIndex = '10000';
hint.style.textDecoration = 'none';
hint.style.webkitBorderRadius = '6px';
// Play around with this, pretty funny things to do :)
hint.style.webkitTransform = 'scale(1) rotate(0deg) translate(-6px,-5px)';
return hint;
}
function elementInViewport(el) {
offset = elementPosition(el);
var up = offset[0];
var left = offset[1];
var width = offset[2];
var height = offset[3];
return (up < window.pageYOffset + window.innerHeight &&
left < window.pageXOffset + window.innerWidth
&& (up + height) > window.pageYOffset
&& (left + width) > window.pageXOffset);
}
function isVisible(el) {
if (el == doc) { return true; }
if (!el) { return false; }
if (!el.parentNode) { return false; }
if (el.style) {
if (el.style.display == 'none') {
return false;
}
if (el.style.visibility == 'hidden') {
return false;
}
}
return isVisible(el.parentNode);
}
var hintable = "//a[@href] | //img | //input";
function Matcher(str){
var numbers = str.replace(/[^\d]/g,"");
var words = str.replace(/\d/g,"").split(/\s+/).map(function (n) { return new RegExp(n,"i")});
this.test = test;
this.toString = toString;
this.numbers = numbers;
function test(element) {
// test all the regexp
return words.every(function (regex) { return element.textContent.match(regex)});
}
function toString(){
return "{"+numbers+"},{"+words+"}";
}
}
function setHints(r){
if(doc.body) doc.body.setAttribute("onkeyup","keyPressHandler(event)");
var re = new Matcher(r);
clearHints();
var c = 1;
var items = doc.evaluate(hintable,doc,null,XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,null);
for (var i = 0; i < items.snapshotLength;i++){
var item = items.snapshotItem(i);
if(re.test(item) && isVisible(item) && elementInViewport(item)){
var h = generateHint(item,c);
item.parentNode.insertBefore(h,item);
c++;
}
}
}
function clearHints(){
var items = doc.evaluate("//div[@class='" + uzblclass + "']",doc,null,XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,null);
for (var i = 0; i < items.snapshotLength;i++){
var item = items.snapshotItem(i);
item.parentNode.removeChild(item);
}
}
function keyPressHandler(e) {
var kC = window.event ? event.keyCode: e.keyCode;
var Esc = window.event ? 27 : e.DOM_VK_ESCAPE;
if (kC == Esc) {
clearHints();
doc.body.removeAttribute("onkeyup");
}
}
function next(elem){
do {
elem = elem.nextSibling;
} while (elem && elem.nodeType != 1);
return elem;
}
function followLink(follow){
var m = new Matcher(follow);
var elements = doc.evaluate("//div[@class='"+uzblclass+"']",doc,null,XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,null);
// filter
var matched = [];
for (var i = 0; i < elements.snapshotLength;i++){
var item = elements.snapshotItem(i);
if(m.test(next(item))){
matched.push(next(item));
}
}
clearHints();
if(matched.length == 1) {
var item = matched[0];
} else {
var item = matched[parseInt(m.numbers,10)-1];
}
if (item) {
item.style.borderStyle = "dotted";
item.style.borderWidth = "thin";
var name = item.tagName;
if (name == 'A') {
if(item.click) {item.click()};
window.location = item.href;
} else if (name == 'INPUT') {
var type = item.getAttribute('type').toUpperCase();
if (type == 'TEXT' || type == 'FILE' || type == 'PASSWORD') {
item.focus();
item.select();
} else {
item.click();
}
} else if (name == 'TEXTAREA' || name == 'SELECT') {
item.focus();
item.select();
} else {
item.click();
window.location = item.href;
}
}
}
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