From 17ce4a00d6d125a58e56aa45d66643a2945ec90c Mon Sep 17 00:00:00 2001
From: Sylvester Johansson <scj@archlinux.us>
Date: Wed, 27 May 2009 03:23:47 +0200
Subject: created a hint object

---
 examples/scripts/linkfollow.js | 381 ++++++++++++++++++++---------------------
 1 file changed, 184 insertions(+), 197 deletions(-)

(limited to 'examples')

diff --git a/examples/scripts/linkfollow.js b/examples/scripts/linkfollow.js
index 5b72812..769f127 100644
--- a/examples/scripts/linkfollow.js
+++ b/examples/scripts/linkfollow.js
@@ -3,230 +3,217 @@
 //
 // 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"
+// "act script linkfollow.js"
+// (currently, it is recommended to use load_finish_handler since the JS code seems to get
+// flushed. Using a load_start_handler with a 1s delay works but not always)
 //
 // when script is loaded, it can be invoked with
-// bind f* = js setHints("%s")
-// bind f_ = js followLink("%s")
+// bind f* = js hints.set("%s")
+// bind f_ = js hints.follow("%s")
 //
 // based on follow_Numbers.js
 //
-// TODO: add classes to hinted elements
+// TODO: set CSS styles
+// TODO: load the script as soon as the DOM is ready
 
 
-var uzblid = 'uzbl_hint';
-var uzblclass = 'uzbl_hint_class';
+function Hints(){
+	var uzblid = 'uzbl_hint';
+	var uzblclass = 'uzbl_hint_class';
+	var doc = document;
+	this.set = setHints;
+	this.follow = followHint;
+	this.keyPressHandler = keyPressHandler;
 
-var doc = document;
-
-
-
-function hasClass(ele,cls) {
-		return ele.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)'));
-}
- 
-function addClass(ele,cls) {
-		if (!hasClass(ele,cls)) ele.className += " "+cls;
-}
- 
-function removeClass(ele,cls) {
-	if (hasClass(ele,cls)) {
-		var reg = new RegExp('(\\s|^)'+cls+'(\\s|$)');
-		ele.className=ele.className.replace(reg,' ');
+	function hasClass(ele,cls) {
+			return ele.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)'));
+	}
+	 
+	function addClass(ele,cls) {
+			if (!hasClass(ele,cls)) ele.className += " "+cls;
+	}
+	 
+	function removeClass(ele,cls) {
+		if (hasClass(ele,cls)) {
+			var reg = new RegExp('(\\s|^)'+cls+'(\\s|$)');
+			ele.className=ele.className.replace(reg,' ');
+		}
 	}
-}
-
-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(pos, label) {
-    var hint = doc.createElement('div');
-    hint.setAttribute('name', uzblid);
-    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 = '1000';
-    hint.style.left = pos[1] + 'px';
-    hint.style.top = pos[0] + 'px';
-    //var img = el.getElementsByTagName('img');
-    //if (img.length > 0) {
-    //    hint.style.left = pos[1] + img[0].width / 2 + 'px';
-    //}
-    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(offset) {
-//    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 elementPosition(el) {
+			var up = el.offsetTop;
+			var left = el.offsetLeft; var width = el.offsetWidth;
+			var height = el.offsetHeight;
 
-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;
-					}
+			while (el.offsetParent) {
+					el = el.offsetParent;
+					up += el.offsetTop;
+					left += el.offsetLeft;
 			}
-			return isVisible(el.parentNode);
-}
+			return [up, left, width, height];
+	}
 
-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 generateHint(pos, label) {
+			var hint = doc.createElement('div');
+			hint.setAttribute('name', uzblid);
+			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 = '1000';
+			hint.style.left = pos[1] + 'px';
+			hint.style.top = pos[0] + 'px';
+			//var img = el.getElementsByTagName('img');
+			//if (img.length > 0) {
+			//    hint.style.left = pos[1] + img[0].width / 2 + 'px';
+			//}
+			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 toString(){
-		return "{"+numbers+"},{"+words+"}";
+
+	function elementInViewport(offset) {
+			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);
+	}
 
-function setHints(r){
-	if(doc.body) doc.body.setAttribute("onkeyup","keyPressHandler(event)");
-	var re = new Matcher(r);
-	clearHints();
-	var hintdiv = doc.createElement('div');
-	hintdiv.setAttribute('id', uzblid);
-	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);
-		var pos = elementPosition(item);
-		if(re.test(item) && isVisible(item) && elementInViewport(pos)){
-			var h = generateHint(pos,c);
-			h.href = function () {return item};
-			hintdiv.appendChild(h);
-			addClass(item,uzblclass);
-			c++;
+	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+"}";
 		}
 	}
-	if (document.body) {
-			document.body.insertBefore(hintdiv,document.body.firstChild);
-	}
-}
 
-function clearHints(){
-	var hintdiv = doc.getElementById(uzblid);
-	if(hintdiv){
-	//var items = doc.evaluate('//*[contains(@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);
-	//	removeClass(item,uzblclass);
-	//}
-		hintdiv.parentNode.removeChild(hintdiv);
-	}
-	var items = doc.getElementsByClassName(uzblclass);
-	for (var i = 0; i<items.length;i++){
-		removeClass(items[i],uzblclass);
+
+	function setHints(r){
+		if(doc.body) doc.body.onkeyup = this.keyPressHandler;
+		var re = new Matcher(r);
+		clearHints();
+		var hintdiv = doc.createElement('div');
+		hintdiv.setAttribute('id', uzblid);
+		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);
+			var pos = elementPosition(item);
+			if(re.test(item) && isVisible(item) && elementInViewport(pos)){
+				var h = generateHint(pos,c);
+				h.href = function () {return item};
+				hintdiv.appendChild(h);
+				addClass(item,uzblclass);
+				c++;
+			}
+		}
+		if (document.body) {
+				document.body.insertBefore(hintdiv,document.body.firstChild);
+		}
 	}
-	
-}
 
-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("//*[@class='"+uzblclass+"']",doc,null,XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,null);
-	var elements = doc.getElementsByClassName(uzblclass);
-	// filter
-	var matched = [];
-	for (var i = 0; i < elements.length;i++){
-		//var item = elements.snapshotItem(i);
-		if(m.test(elements[i])){
-			matched.push(elements[i]);
+	function clearHints(){
+		var hintdiv = doc.getElementById(uzblid);
+		if(hintdiv){
+			hintdiv.parentNode.removeChild(hintdiv);
+		}
+		var items = doc.getElementsByClassName(uzblclass);
+		for (var i = 0; i<items.length;i++){
+			removeClass(items[i],uzblclass);
 		}
+		
 	}
-	clearHints();
-	var n = parseInt(m.numbers,10);
-	if(n){
-		var item = matched[n-1];
-	} else {
-		var item = matched[0];
+
+	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 followHint(follow){
+		var m = new Matcher(follow);
+		var elements = doc.getElementsByClassName(uzblclass);
+		// filter
+		var matched = [];
+		for (var i = 0; i < elements.length;i++){
+			if(m.test(elements[i])){
+				matched.push(elements[i]);
+			}
+		}
+		clearHints();
+		var n = parseInt(m.numbers,10);
+		if(n){
+			var item = matched[n-1];
+		} else {
+			var item = matched[0];
+		}
 
-//	if(matched.length == 1) {
-//		var item = matched[0];
-//	} else {
-//		var item = matched[parseInt(m.numbers,10)-1];
-//	}
-		//alert(matched.length);
-    if (item) {
+		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;
-        }
-    }
+				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;
+				}
+		}
+	}
 }
+
+var hints = new Hints();
+
+
-- 
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