Tracking changes in web application - javascript

I have an application in which the user needs to see the changes that have been made during the latest edit.
By changes I mean, the changes made in all inputs like a textarea, dropdowns.
I am trying to implement this by showing a background image on the right top and then when the user clicks this background image, a popup is shown which shows the difference.
I am using prototype 1.7.0.
My First question would be:-
1. What would be the best approach to implement this functionality?
2. Can I put a onClick on the background image?

There some functions in the jQuery library that I believe would be helpful to you. If you are using prototype, I would guess that there is some similar functionality you may utilize.
I would suggest writing some code like this:
var $input = $('input').add('textarea').add('select');
$input.each(function() {
var id = $(this).attr('id');
var value = $(this).val();
var hiddenId = 'hidden' + id;
var newHiddenInput = $("<input type='hidden'").val(value).attr('id',hiddenId);
$(this).after(newHiddenInput);
});
The above code will create a new hidden input for each input, textarea, and select on your page. It will have the same value as the input it duplicates. It will have an id equivalent to prepending the id with the word 'hidden'.
I don't know if you can attach a click handler to a background image. If your inputs are enclosed inside a <div>, you may be able to get the result you want by attaching the click handler to your div.
In any case, you should now have the old values where you can easily compare them to the user's input so that you can prepare a summary of the difference.

Prototype gives us the Hash class which is almost perfect for this but lacks a way of calculating the difference with another hash, so let's add that...
Hash.prototype.difference = function(hash)
{
var result = this.clone();
hash.each(function(pair) {
if (result.get(pair.key) === undefined)
// exists in hash but not in this
result.set(pair.key, pair.value);
else if (result.get(pair.key) == pair.value)
// no difference so remove from result
result.unset(pair.key);
// else exists in this but not in hash
});
return result;
};
This is no way to tell if an element was clicked on just it's background image - you can find out the coordinates where it was clicked but that is not foolproof, especially since CSS3 adds complications like multiple backgrounds and transitions. It is better to have an absolutely positioned element to act as a button.
$('button-element').observe('click', function() {
var form_values = $H($('form-id').serialize(true));
if (old_values) {
var differences = old_values.difference(form_values);
if (differences.size()) {
showDiffPopup(differences);
}
}
window.old_values = form_values;
});
// preset current values in advance
window.old_values = $H($('form-id').serialize(true));
All that remains is to implement showDiffPopup to show the calculated differences.

Related

Add a link to a form with jQuery (userscript) in Firefox

I'm trying to add a search link to an online form with a userscript using jQuery. I don't work too much in firefox and I feel like things that would normally work in chrome don't in ff 9/10 times for me. But anyway... this needs to be with ff.
I'm taking the text from a <p> element and creating a search url out of it (or trying to). Right now this is the function I'm trying that should be doing it... but it's doing nothing, not even any errors in console
$(function() {
var companyName = $('p')[7]; // Element that contains the name text
var companyText = companyName.text(); // Retrieve the text from element
var mixRankUrl = $("<a></a>").innerHTML("Search Mixrank"); // Create an <a> element
mixRankUrl.href = 'https://mixrank.com/appstore/sdks?search=' + companyText; // Define the href of the a element
var sdkPara = $('label.control-label')[10]; // Where I want it to go
sdkPara.append(mixRankUrl); // Append the element
});
Also, whoever wrote the html uses hardly any ids, and most classes are assigned to 10 or more elements... so unless there's a better way, I'm sort of stuck using node selectors (which stay the same form to form).
The problem is that you try to use jQuery method on DOM element. Don't understand why you don't have any errors with your code.
For exemple : $('p')[7] return a DOM element while $('p').eq(7) return a JQuery object. So you can't use a jQuery method like text() on your DOM element. You need to deal with jQuery object.
For the same reason, you had a problem with the declaration of your label object and with the modification of the href attribute of your link.
Try like this :
$(function() {
var companyName = $('p').eq(7); // Element that contains the name text
var companyText = companyName.text(); // Retrieve the text from element
var sdkPara = $('label.control-label').eq(10); // Where I want it to go
var mixRankUrl = $('<a>',{
text: 'Search Mixrank',
href: 'https://mixrank.com/appstore/sdks?search=' + companyText
}).appendTo(sdkPara); // Append the element
});

Change multiple div contents on another div mouse hover without css/with an xml source file

I'm working on this site, and I need to change the contents of image_preview, title_preview, description_preview, link_preview according to what I'm hovering over (ex: mouse hover "button_a" = image1.png, iliketitle, ulikedesc, welikelink).
I've tried using css solutions like this and this, but I wasn't able to make them work like I needed.
Since the page will have many button_#'s (50-100 buttons), I think css isn't a proper choice.
So what I'm looking for is a way to do this without css, better if with an xml source file, so it'd be easier to manage the content to display for each button. I only found this talking about the xml I'd need, but I'm not sure that's exactly what I need.
Your buttons have a class (e.g. .btn) and the associated data to each button is store somewhere, let's say each button has a data-* attribute which points to the right data.
$('.btn').hover(function() {
var data = $(this).data('something');
if(data == "b1") {
//assign the values related to b1
}
else if(data == "b2") {
//assign the values related to b2
}
//and so on
}
If you have a lot of buttons like that, then the data can be a reference to an array containing the proper info.
Here's a jsfiddle DEMO.
And here's updated DEMO.
EDIT:
.hover() can take two handler which the second will handle when mouse is out of the element.
yourElement.hover(
function() {
//mouse is on the element, do stuff
},
function() {
//mouse is out, do other stuff
}
);
You can have a function to set the default values and call that in hover's second function.
jsfiddle DEMO

Read more opens 1st one all the time

I've a page with about 10 short articles.
Each of them as a "Read More" button which when pressed displays hidden text
The issues I have at the moment is when I press the "Read More" on any of the 10 button it shows the 1st articles hidden content and not the selected one.
I think I need to set a unique ID to each article.. and the read more button be linked to it.. But I don't know how to set it.
I looked at this but couldn't get it working how to give a div tag a unique id using javascript
var WidgetContentHideDisplay = {
init:function() {
if ($('#content-display-hide').size() == 0) return;
$('.triggerable').click(function(e){
var element_id = $(this).attr('rel');
var element = $('#'+element_id);
element.toggle();
if (element.is(':visible')) {
$('.readmore').hide();
} else {
$('.readmore').show();
}
return false;
});
}
}
var div = documentElemnt("div");
div.id = "div_" + new Date().gettime().toString;
$(document).ready(function(){ WidgetContentHideDisplay.init(); });
OP Edit: Sorry, the original code wasn't in caps. I kept getting errors when trying to post, so I copied the code into Dreamweaver and it made it all caps for some reason.
Instead of selecting the element to toggle with an ID (i.e. $('#'+ELEMENT_ID)) you could setup a class for your item and use the class selection (e.g. $('.DETAILED-ARTICLE)') to select the child (or the brother, etc. depending how you built the HTML page).
In theory each ID should point to a single element but each class can be put to as many elements as you want.
If you're getting errors, read the errors and see what they are. Off of a quick read of your code, here are a couple things I noticed that will probably cause issues:
"documentElemnt" is misspelled, which will render it useless. Also, documentElement is a read-only property, not a function like you're using it.
toString is a function, not a property, without the parentheses (.toString()) it isn't going to function like you want it to.
Run the code, look at the errors in the console, and fix them. That's where you start.

jQuery hide - how to know if element has started to hide but still visible?

I have form where are inputs. Answers and visibility of the inputs may affect visibility of other inputs which are located below it.
I have javascript function which is called when value of some of the inputs have changed. The function is going through every input and checking it’s visibility and answer. Based on that information it may hide or show some other inputs. One loop is enough, because visibility of the element can’t affect visibility of previous elements.
$(".test_this").each(function() {
var id_number = $(this).attr("id").split("_")[1];
var tested_id = parseInt(id_number) + 1;
if ($(this).find("input:checked").val() != 1 || $(this).is(":hidden")) {
if ($("#element_"+tested_id).is(":visible")) {
$("#element_"+tested_id).hide();
}
}
else {
if ($("#element_"+tested_id).is(":hidden")) {
$("#element_"+tested_id).show(500);
}
}
});
My code is working well, but I would like to add duration to hide-function, but then my visibility check fails. Is it possible to know if some element has started to hide but is still visible?
I don’t want to use callback function, because it is executed after the delay. Second, I don’t want to change values of hidden inputs. One solution is to add some extra class which existence would be possible to check, but is there some better way to do this?
My code in Fiddle: http://jsfiddle.net/nmUPj/3/
For the further information, my actual code is lot more complicated and getting information about form from MySQL and generating form and javascript code with PHP.
You can check if the element is still animating by:
$("#element_"+tested_id).is(":animated")
Alternatively, you can give a callback function to your show(),
$("#element_"+tested_id).show(5000, function(){
alert('animation completed');
});

How do you 'replace' numbers with 'x's' in jQuery with one button?

Does anyone know how to do replace multiple text by clicking a button with jQuery?
I've built a website that displays some text/data eg; "£100.00", but I what I need is to be able to 'replace' those monetary values with "£XXX.XX" with a 'Hide' button like you get on some banking websites. For example one web page has:
£100.00, £200.00, £130.00 etc etc..
...so when a user presses the Hide button, all of the numbers on the page turn to £XXX.XX. Ideally, the button should then display "Show" instead of "Hide" and switch back when toggled.
This is for a static dummy site, so no data base.
I suspect this is best handled with jQuery?
Thanks for your time,
D.
Case 1: Controlled Input
Assuming you can at least wrap all monetary values with something like this:
<span class="money-value">£200.00</span>
<span class="money-value">£300.50</span>
And that you can add button declared with:
<button id="secret-button">hide</button>
Then you could have some jQuery code doing this:
/**
* Simple search and replace version.
*/
$(function() {
$("#secret-button").click(function() {
$(".money-value").html($(".money-value").html().replace(/[0-9]/g,"X"));
});
});​
or a more advanced one with:
/**
* Complet version.
*
* 1) on button click, if asking to hide:
* 1.1) iterate over all entries, save their text, and replace it with markers
* 1.2) toggle the button's text to "show"
* 2) on button click, if asking to show:
* 2.1) iterate over all entries, restore previous text
* 2.2) clear the hidden store
* 2.3) toggle the button's text to "hide"
*/
$(function() {
var hiddenStore = [];
$("#secret-button").click(function() {
if ($(this).html() == "hide") {
$(".money-value").each(function () {
var text = $(this).html();
hiddenStore.push(text);
$(this).html(text.replace(/[0-9]/g,"X"));
});
$(this).html("show");
} else {
$(".money-value").each(function (i) {
var text = hiddenStore[i];
$(this).html(text);
});
hiddenStore = [];
$(this).html("hide");
}
});
});​
Complete solution is here: See here: http://jsfiddle.net/u79FV/
Notes:
this won't work for input field values
this assumes your text entries have been marked as shown above
Does what you want with the button's changing state.
Saves the values and puts them back.
Meant to work even if new fields are added dynamically.
Shankar Sangoli's answer uses a different way of saving the stored data, which you could as well consider (using the jQuery .data() method).
you may want to switch the button to an <input type="button" /> tag, in which case you'd use .val() instead of .html() to toggle its text.
Case 2: Uncontrolled Input
Assuming you don't have control over where the values may show up, then you need to do something a bit more complicated, which is to look in the whole page for something that would look like a currency format. I'd advise against it.
But, the jQuery Highlight plugin could be something to look at, as its code does something similar (in that it searches for pieces of code to modify), and you could then reuse some of solution 1 to make it fit your purpose.
That would be harder to design in a fool-proof fashion though.
You could use a regular expression:
var expression = /\d{1}/g;
var newString = myString.replace(expression,"X");
Then just dump newString into whatever control you need it to appear in.
Edit:
A jQuery idea for something like this would be to give all of the controls that have these numbers a common class identifier to make them easy to grab with the selector:
$(".numbers").each(function() {
$(this).text($(this).text().replace(/\d{1}/g, "X"));
}
... more readable ...
$(".numbers").each(function() {
var text = $(this).text();
var newText = text.replace(/\d{1}/g, "X");
$(this).text(newText);
}
If your markup is something like this you can try this.
<span>£1000.00</span><span class="showhide">Hide</span>
JS
$('.showhide').click(function(){
var $this = $(this);
var $prev = $this.prev();
if(!$prev.data('originalvalue')){
$prev.data('originalvalue', $prev.text());
}
if($this.text() == 'Hide'){
$this.prev().text($prev.data('originalvalue').replace(/\d{1}/g,"X"));
$this.text('Show');
}
else{
$prev.text($prev.data('originalvalue'));
$this.text('Hide');
}
});
In the above code I am basically storing the original value using jQuery data method within the span element itself which is used to display the actual value.
Once you click on Hide, get the previous span using prev() method and set its text with original value replacing all the numbers in it by X. Then change the link text from Hide to Show.
Next when you click on Show get the previous span using prev() method and set its text with the original value and change the link text from Show to Hide.
References: .prev(), .data()
$('#yourButton').click(function(){
var saveText = $('body').text();
$(this).data('oldText', saveText);
if ($(this).text() == "Hide"){
$('body').text($('body').text().replace(/\d{1}/, "X"));
$(this).text('Show');
}
else{
$('body').text($(this).data('oldText'));
$(this).text('Hide');
}
});
This is kind of a complicated problem actually. You will need to be able to save the state of the text when its in number form so you will be able to toggle back and forth. The above code is untested but hopefully it will give you an idea what you need to do.
function toggleMoney() {
$('.money').each(function() {
var $$ = $(this), t = $$.text();
$$.text($$.data('t') || t.replace(/\d/g, 'X')).data('t', t);
});
$('#toggleButton').text($('.money').text().match(/\d/) ? 'hide' : 'show');
}
http://jsfiddle.net/DF88B/2/

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