How to show panel with dynamic content (HTML) in it - javascript

I want to show drop-down menu with HTML content in it when the user presses my addon's button on browser's toolbar.
It seems that I need to use panel as suggested in the documentation but the problem is that my content is dynamic and can change over time while addon works. AFAIK panel can only work with predefined HTML files and change its content via scripts provided by contentScript property, but even then it is clearly stated in the documentation that it can lead to the non-approved addon:
Warning: Unless your content script is extremely simple and consists
only of a static string, don't use contentScript: if you do, you may
have problems getting your add-on approved on AMO.
Instead, keep the script in a separate file and load it using contentScriptFile. This makes your code easier to maintain, secure,
debug and review.
What can I do then?

The paragraph you quote refers to defining complex scripts inline with the contentScript parameter. If you use contentScriptFile to load the script which then modifies the HTML that should be fine.

Related

Get iframe element of current CKEDITOR instance

CKEditor 4 or above
I have a CKEDITOR instance that I can access without problem parent.CKEDITOR.instances[instance_id]
I want to add bootstrap file to the head of the iframe generated by CKEDITOR (kind of hack, because normal way to add optional css file was not working).
I tried to get the iframe head and to inject the bootstrap file, but it fails always.
Any Suggestion?
If you are using classic editor with contents in iframe then please use contentsCss configuration setting to add extra CSS to editor contents area. It is important to refresh the cache with Ctrl+F5. If for some reason changes are not applied and path to CSS file is correct (you are not getting 404 in browser dev-tools console) then you might want to try clearing cache according to this link.
If you really need to get to the iframe, you can use below technique. It gets you the div with editor id you need and it finds iframe for it. This is good if you have couple of editors or iframes on a single page.
document.getElementById('cke_'+ your_textarea_id ).getElementsByTagName('iframe')[0].contentWindow
I found it finally, I post it here so maybe it will be helpful for someone in the future.
I just added the bootstrap file to the body tag (it is a bad practice but it works).

HTML tags don't appear in DOM when included using ng-include

I'm trying to include a file using ng-include.
the side-bar appear in the UI but when I say view page source that time the HTML tags of the side-bar doesn't appear.
That is because when you view the source of an HTML page in any browser, it will perform a fresh GET of the original document and display that source code. Since AngularJS injects elements to the DOM dynamically (and because it is "just" JavaScript all together), the original generated by the server-side will not be modified. To see the generated source, use a developer tool of your choice, i.e F12 Developer Tools in IE. Also, you may want to read up on the role JavaScript plays in the whole lifecycle of webpage rendering.

Gmail Chrome Extension "chrome.extension" undefined

I have a content script running inside the Gmail UI and I am injecting some new HTML at different points. This is all working, but to keep the code clean I wanted to insert pre-defined HTML markup into certain parts of the page in a single function call.
This all seems feasible using chrome.extension.getURL(), but when I was testing this, it looks like chrome.extension is undefined! I was unable to find anywhere in the documentation that says this shouldn't be defined and several places where it says it should.
I am using chrome Version 39.0.2171.95 (64-bit)
Here is what the chrome object looks like in the javascript console:
First off, anyone know why chrome.extension might be undefined? Secondly, is there another (perhaps better) way to do this? I'd rather not just programmatically inject a large amount HTML into the page in code using jQuery, etc. in the content script, but can resort to this if there is no other way.
If you're testing this in the console, you must be aware of the concept of the Isolated World. When you add a content script, it has a separate JavaScript context for itself that is isolated from the page.
At the top of the Console tab of Dev Tools, you'll see <top frame> in a dropdown. This is a dropdown that selects JS context it is executing in. It will list frames inside the document and all extensions that have content scripts injected.
The chrome object you show in the screenshot corresponds to what the webpage normally sees. If you switch context, you'll see a different picture:
In any case, if you are really executing chrome.extension.getURL() in the content script - it will be well defined.
Now, if you injected a <script> tag in the page and tried it in that code - it would fail again, since the code will be in the page context. See this question for this situation.
Finally, most of the Chrome API will not be exposed to content scripts for security reasons. If an API is undefined when it shouldn't be, you may need a background page to do the job for you.

load external site and change its visualization

I'm trying to create a web page able to change a site visualization (.css or / and .js) in order to recreate the same live change capability offred by Firebug for Firefox or the Inspector of Chrome.
Here an image to better explain my task:
I have been able to visualize the other site inside my page using the iframe, but unfortunately it is not possible to change its visualization and access its elements due to the "same origin policy".
Is there a way to do this using the iframe or loading the external site inside another element?
Update:
Considering the answers the options should be:
create a php proxy page to load the target site and change visualization on it.
create a browser extention.
I've tried the first, even if it requires to install a web server (xampp), with a simple page calling the function file_get_contents('http://www.site.com');
The page is loaded but unfortunately missed some elements (like images) and it is only a static copy; it is not possible to go further in the site navigation.
Update 2:
Load the entire page via javascript could be the better solution (I don't konw how) if it is possible to live change the code but what about the possibility to interact with this "page copy" and transfer the interaction to the original one?
Scheme:
Explanation:
I've noticed Firebug extention can select and live edit any page element, even if they belong to the iframe which loads an external domain page.
What I'm looking for is a way to act like Firebug, get an element and change its style.
I'm trying to load the site into the iframe beacuse I wanted to create a toolbar above it to select my "visualization styles"; for example a button to makes titles bigger and red.
Anyway I'm open to any other methods suggestions.
Update 3:
I have found an extention for both FireFox and Chrome which is really close to my aim: "Stylish"
This add on allows to live change any site css proprerty and save it in order to reload them every time you'll visit the page.
Now my question is: How can I do the same creating a dedicated page to load and change visualization of a specific site?
FINAL EDIT:
In order to continue this question with a more relevant arguments I decided to ask a new one: create a php proxy page
No. Your solutions may be
to let your own site act as proxy so the same origin policy isn't triggered
to build an extension, which will be browser dependent (Firefox or Chrome) and which will require authorization and installation
I'm not sure if I understand what you want very well, but my feeling to ''trick'' this easier would probably to give very specific height and width to your first site (the iframe) and do a jQuery condition
If ($('body').width() == 500 && $('body').height() == 400 {
$('body').addClass('isiFrame');
}
Then, you only have to do your css .isiFrame .myCoolDivs {....}
You might have to use it on a document ready also, but that could be one way to trick it and since you're not doing it on resize (exepect if somebody's having his screen at this exact width and height at start)
The safer way would probably to create a master session using PHP but I cannot give you an example since it've been to long and echo the body class if the master_session or variable is equal to true
Hope it helped!
If you try to fight Same_origin_policy and try to fight it I am sure you won't get much success their.
Server Side
I would suggest you Handle this on server-side, grab the web-page and apply whatever styling and scripts you want, should be very easy!!
If you use Ruby on rails - Nokogiri gem can help you to parse html. And you can use standard library to 'get' a webpage.
Client Side
If you want to do this on client side, you need to write some jquery/javascript code, you can take following steps:
Get the webpage you want to display.
Grab the element's which include js/css files, remove them and your own.
Display the page in new Iframe present in your page.

Loading external content with jquery or iframe?

Hiho,
There's an existing website that i need to include into another site which goes like this:
a.mysite.com
and i need to fetch content from this site in my
www.mysite.com
website...
As i need to access the content of the iframe the Same origin policy produces a problem here.
What i did was to configure mod_proxy on Apache to proxy pass all requests from
www.mysite.com/a
to
a.mysite.com
This will work fine...but my problem is that im not sure what the best way would be to include those pages.
1. Idea
As the content of the iframe is a full featured site with a top navigation...left navigation etc....i would need to change the page template to only show the content box to be able to integrate that page in the iframe.
2. Idea
I could just load the DIV where the content lies through JQuery.load() and integrate it into my site.
What is the best way to accomplish such a task? How bad is both ideas from the SEO point of view?
Unless it involves significant rework, the best solution is to combine the two into a single HTML page on the server side (using server-side includes).
Advantages:
No problems with SEO as it's delivered as a single page. Content in iFrames and content loaded via AJAX (with an associated link in the HTML) are traversed, but only the link, not the content itself is associated with the main page. See: http://www.straightupsearch.com/search-marketing/best-practices/seo_iframes_a_g/
Faster page load - either of your suggestions will cause the main page to be loaded first before the other content is loaded.
No reliance on Javascript - your second method will fail completely if javascript is not supported / turned on.
Include all JS and CSS only once - your first method will require these to be duplicated in the <head> of each page. This is more of a long term advantage if you wish to achieve full integration of site "a". However, it can be a disadvantage initially, see below.
Disadvantage:
May cause conflicts with scripts and CSS between the two pages. However, this same problem exists with your second method.
If you must choose between either of the two options you proposed, I would not select the second as others have suggested. Significant amounts of static content should never be loaded via Ajax, and in this scenario gives you no additional benefits. At least iFrames guarantee no JS and CSS conflicts.
Use the 2nd approach (jQuery.load) and if you're working with HTML5, for browsers that support the History API you can change the URL to whatever the content is for that div.
Check out https://github.com/blog/760-the-tree-slider for an example of how github did it for their tree slider.
EDIT:
I am not sure how using an iFrame whose src points to your own domain affects search rankings but at best it's a grey area. I would assume that possibly some pagerank would trickle from the parent to the child but I have no clue how it would work for instance if a blogger linked to your page with the iframe that pointed to another page. This would be a pretty good question to ask at the Webmaster Help Forum
Always say no to iframes. jQuery+Ajax all the way.

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