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POBuilding IntelliSense/AutoComplete in JavaScript
 

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    <p>I currently maintain an add-on for Firefox that adds a number of capabilities to a forum web site that implements its own markup language, similar to what stackoverflow provides with "Markdown."</p> <p>I have built an IntelliSense function for this add-on, which, similar to Visual Studio, will pop up an auto-suggest when typing this markup in a textarea. Example:</p> <p><a href="http://members.lycos.co.uk/suffusion/namfox/faq-1.5/autocomplete-example-2-1.jpg" rel="noreferrer">http://members.lycos.co.uk/suffusion/namfox/faq-1.5/autocomplete-example-2-1.jpg</a></p> <p>The hardest thing about the implementation is finding the (x,y) coordinates of a key press in a textarea so I can pop-up the IntelliSense window very close to it. The keypress events in JavaScript do not expose these coordinates, so I've had to work around this. Unfortunately I could only find a cross-browser compatible way of getting the y-coordinate, not the x-coordinate. The code for this is located <a href="http://code.google.com/p/namfox/source/browse/trunk/chrome/content/enhancements/auto-complete/AutoCompleteController.js#281" rel="noreferrer">here</a> in the _getPopupPoint function.</p> <p>This works for Firefox because I use some of Mozilla's XPCOM interfaces to get the coordinate. So while this works for Firefox, now that I want to port my add-on to Google Chrome, I couldn't find a way to get the coordinates.</p> <p>So what I'm asking is twofold: (1) Is there a better way to get the x-coordinate of a key press? (2) If not, is there anything I can do in the context of a Google Chrome add-on to get the same data?</p>
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    1. USDavid DeWinter
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    1. CO+1 because of releasing code, and in order for you to attach images
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    2. COThanks! Just posted the image.
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      1. USDavid DeWinter
 

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