Parse html using C

You want to use HTML tidy to do this. The Lib curl page has some source code to get you going. Documents traversing the dom tree. You don’t need an xml parser. Doesn’t fail on badly formated html.

Can I nest form tags in other form tags?

No, nested forms are forbidden. This is expressed in the HTML 4.01 DTDs as: <!ELEMENT FORM – – (%block;|SCRIPT)+ -(FORM) — interactive form –> — This means A FORM has a mandatory start tag, mandatory end tag and can contain anything in %block or SCRIPT, except other FORMs. XML DTDs aren’t as expressive as … Read more

Are void elements and empty elements the same?

The term “empty element” comes from SGML, on which HTML standards prior to HTML5 were based, and where the EMPTY keyword is used to represent elements with an empty content model. Here’s what the HTML 4 spec says: The allowed content for an element is called its content model. Element types that are designed to … Read more

CSS – make div’s inherit a height

As already mentioned this can’t be done with floats, they can’t inherit heights, they’re unaware of their siblings so for example the side two floats don’t know the height of the centre content, so they can’t inherit from anything. Usually inherited height has to come from either an element which has an explicit height or … Read more

Make floating divs the same height

You could try instead of using float, use display: table-cell. You might find some older browsers don’t understand this rule however. See below: #wrapper { display: table; // See FelipeAls comment below width: 300px; } #left { display: table-cell; width: 50px; background: blue; } #right { display: table-cell; width: 250px; background: red; }

Image center align vertically and horizontally [duplicate]

There’s a few good ways to both horizontally and vertically center an element, it just comes down to the situation and your preference. With the following markup: <div><img src=”” width=”100″ height=”100″></div> line-height div { width:300px; height:300px; line-height:300px; text-align:center; } div img { vertical-align:middle; } Good quick fix without messing with positioning too much but if … Read more

HTML canvas with scrollbar

Specify the total width of the canvas then wrap it in a div. Set the div to overflow: scroll and give that the 500px width. You should then have scrollbars allowing you to scroll and see the hidden parts of the canvas. Repeat this for all of the canvases. <div style=”max-height: 256px;max-width:256px;overflow: scroll;”> <canvas height=”512px” … Read more