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Username: jmb
Realname: John-Mark Bell
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Recent comments

On NetSurf on RISC OS faces axe:

The fallout from the recent massive CSS-related changes in the core suggests otherwise. All we received was a bunch of bug reports about issues we already knew about.

I fully expect other large-scale changes to the core to follow the same pattern -- things simply don't get into the core code without us being fully aware of the impact.

That's not to say, of course, that all the code is free of bugs (that would be ridiculous) or that we don't value the reports we do get. It does indicate, however, that the amount of testing we do before things get into the core results in far more robust code than you might expect.

 is a RISC OS Userjmb on 13/8/09 11:59PM
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On NetSurf on RISC OS faces axe:

I assume you mean form controls?

If so, then the only thing the frontend needs to care about is select menus. Even that can be provided by the core, if the frontend does not want to provide its own menu.

In fact, I envisage only the RISC OS frontend ever overriding the default menu in this case, given that emulating RISC OS menu functionality in the core isn't a particularly good idea.

 is a RISC OS Userjmb on 12/8/09 12:46PM
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On NetSurf on RISC OS faces axe:

Correct. Almost the entirety of any NetSurf frontend is simply concerned with handling events and rendering things the core or window manager asks for.

A frontend need not care what is actually being displayed in a window -- it simply deals with drawing primitives (e.g. lines, arcs, rectangles).

 is a RISC OS Userjmb on 10/8/09 11:37AM
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On NetSurf on RISC OS faces axe:

Correct. NetSurf's layout engine is entirely based upon CSS.

Any HTML presentational hints that apply to a given element are converted to CSS properties when calculating the relevant styling for the element.

Thus, in the case of <sub> and <sup>, there's a pair of style rules in the default stylesheet, thus:

sub { vertical-align: sub; font-size: .83em; } sup { vertical-align: super; font-size: .83em; }

 is a RISC OS Userjmb on 10/8/09 11:29AM
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On NetSurf on RISC OS faces axe:

See my earlier comment. It's not as simple as moving features wholesale from the RISC OS frontend into the core.

 is a RISC OS Userjmb on 9/8/09 8:35PM
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Recent articles and quickies

  • Writing internationalised software
    John-Mark Bell dives into the nitty-gritty of Unicode and writing RISC OS software for users worldwide
     4 comments, latest by caliston2 on 13/4/05 2:04PM. Published: 13 Apr 2005

  • South East show report
    VA Linux, graphics acceleration, CTL and ROL and more
     53 comments, latest by AMS on 01/11/04 1:01PM. Published: 23 Oct 2004

  • A punter's view of the South East show
    John Bell recounts his day in Guildford
     31 comments, latest by mavhc on 20/10/03 10:42AM. Published: 18 Oct 2003

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  • South East 2006 show report
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    Clock-watching nerds rejoiced this week as all modern ROS machines reached a mildly baffling milestone. The OS keeps track of the current time by storing it as the number of one hundredths of a second elapsed since midnight January 1, 1900 - and this figure ticked over to 0x5000000000 in the early hours of Tuesday, provoking excitement among some.
     8 comments, latest by druck on 24/11/08 9:02AM. Published: 20 Nov 2008

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