On 6 Aug, 06:14 pm, lacrima.ma...@gmail.com wrote:
Hello,
I have been trying to create a widget that encloses manhole
interpreter.
Here is somewhat hacky implementation that I came up with at this
moment:
Widgets and the manhole interpreter are implemented using two pretty
distinct approaches.
As you've figured out, these approaches can be integrated (at least in
one direction) using a terminal emulator -
`twisted.conch.insults.helper.TerminalBuffer`.
However, `TerminalBuffer` is an extremely low quality terminal emulator.
Among its many flaws is that it uses a number of incredibly inefficient
implementations for common terminal operations (many of its other flaws
are along the lines of "it has a bug in the implementation of X").
If I were going to create a manhole widget then I would do it "natively"
- not by bridging the existing manhole protocol to the widget system
with TerminalBuffer but by writing a new widget that does manhole stuff
all by itself.
I suggest that you might want to pursue this approach instead of trying
to optimize and fix bugs in TerminalBuffer.
Ultimately it would be nice if a widget-based manhole were *the* manhole
and the current implementation went away.
However, that said, as far as I know, no vt-style terminals support
efficient redrawing for the "vertically scroll one portion of the
terminal separated from another portion by a vertical divider".
You will be able to avoid the redundant work of re-rendering the Python
buffer representing the terminal state but you'll still have to re-
transmit the bytes representing the entire terminal display to the
terminal on each redraw - unless you avoid vertical dividers.
Jean-Paul
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