debugging a CEF browser instance
mark at livecode.com
Thu Jul 6 09:28:42 CEST 2017
On 2017-07-06 08:39, Jonathan Lynch via use-livecode wrote:
In general there is a cost to logging - particularly CEF's which is very
verbose. On Windows you might not notice (as stdout/stderr output is
generally dumped to the equivalent of /dev/null), but on Linux if you
happen to be working from the command-line and running UI stuff using
the browser widget from there then you'll find your terminal flooded
with CEF logging (and I mean flooded!).
I don't think anyone has asked specifically about having it configurable
before now - although I noticed it would be useful last month
(http://quality.livecode.com/show_bug.cgi?id=19862) whilst attempting to
figure out why the browser widget only works on *some* linux installs
(seems to be somewhat independent of distribution - the workarounds some
people have found with regards the locale don't seem to work anymore).
Unfortunately, we aren't any closer to solving the linux problem...
After at least three of us spending more hours than I'd care to comment
on trying to figure out what is happening there, we're working through a
couple of tasks so that we can more easily update CEF to the latest
In particular, making it so that we can build our 'prebuilts' (currently
ICU, OpenSSL and Curl) on vulcan (doing it manually is arduous and
intensely error prone). We can then move the building of the CEF library
component to a prebuilt and automate its generation based on a version
tag (we can thank Spotify for taking over the management of binary
releases of CEF - http://opensource.spotify.com/cefbuilds/index.html -
as they've made it much much easier).
So we're currently involved in a (small) yak-shave in this regard...
Although one which will also mean we can solve a couple of other issues
- the size of ICU data (has anyone noticed that the 9 engines are
somewhat bigger than 8? That's down in good part to the ICU data), and
also the several minute increase per platform in build time due to the
Skia update. I also hope that this means that over time we can eliminate
the thirdparty submodule entirely - which would be one less point of
friction in our source base.
Incidentally, Bernard and Jonathon - I take it you are using the browser
widget on Windows? (The reason I ask that is because CEF is only used on
Windows and Linux - Mac/Android and iOS all use the built-in browser -
all three are WebKit derived, like CEF).
Mark Waddingham ~ mark at livecode.com ~ http://www.livecode.com/
LiveCode: Everyone can create apps
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