SerialConnect: implement clipboard paste

Change-Id: Iaddb6588afa774bcffad9713f280a0078784605a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6770
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

SerialConnect: make reverse video work

It's useful to see our openboot boot menu.

I'm not sure what B_NEGATIVE_FACE is meant to do. The be book says
"Characters are drawn in the low color, while the background is drawn in
the high color.", but DrawString does not draw the background, so some
color swapping will still be needed in this case anyway.

SerialConnect: Fix build on 64-bit.

SerialConnect: implement PopLine to get items from scrollback

Allows to make the scrollback visible again when resizing, instead of
adding blank lines at the bottom.

Change-Id: I7a14188cdcb14bcd197325b935d8cfe2435ae80f
Reviewed-on: https://review.haiku-os.org/c/1464
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

SerialConnect: add a clear/reset menu.

Change-Id: I0435ba679e19094d201d65ac0c6290cd194ec344
Reviewed-on: https://review.haiku-os.org/c/1463
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

SerialConnect: increase scrollback size

1000 lines is not enough for a full boot log.

Change-Id: If1fe48349dec5cf0574de612c533b0037abc5043
Reviewed-on: https://review.haiku-os.org/c/1021
Reviewed-by: Stephan Aßmus <superstippi@gmx.de>

SerialConnect: optimize drawing

The libvterm implementation was sending characters to app_server one by
one. This made it very slow to update the view and SerialConnect would
have noticeable flickering.

We now look through each line and try to find ranges of characters with
the same attributes. We can then draw each of these with a single
FillRect+DrawString. In the normal case (no special attributes or colors
anywhere), this means just one call per line, plus two for the cursor.

SerialConnect: allow to change line terminator

* It can now be used to send AT commands for example, which need \r
instead of \n.

Use strict mode when url-decoding file requests.

We don't want '+' to become a space here.
Fixes #11109.

SerialConnect: fix return and backspace keys.

Style fixes.

Translate arrow keys to VT100 escape sequences

* I think this is what everyone expects.

SerialConnect: some simplifications

* Use integers for x and y coordinates in the draw loop, too
* Simplify _GetCell by using the return value of vterm_screen_get_cell
to detect out of bounds access, instead of testing for that manually.

Avoid calling PenLocation for every char.

PenLocation is retrieved from app_server (because DrawString changes it
there), so this made drawing very slow.

SerialConnect: draw the cursor.

* Drawn as "inverse video" for now.
* Should use VTerm state to get the cursor shape (rect, underline or
left line)
* Should also handle blinking if enabled, and visibility.

Build fix.

SerialConnect: use ints for font metrics

As pointed by Ingo, using a float here is useless because we want each
line to be the same integer number of pixels. Now thigs are drawn
properly and the view has the exact same size as Terminal's one (tested
with font sizes 10 and 18, so different leading values don't seem to be
a problem).

Thanks for reviewing!

SerialConnect: implement scrollback.

SerialConnect: fix font metrics for good.

* Set the background color in AttachedToWindow to avoid white lines in
initial drawing,
* Fix computation of font size again so lines don't overlap.

Note: lines are apparently spaced 1px less than in Terminal. But they
don't seem to touch or overlap each other in SerialConnect.

Fixes CID 1162805, 1162804, 1162773, 1162759.

Make SerialConnect more complete

* Mark the current connected device, or disable "Disconnect" menu when
there is no connection.
* Save and restore serial port settings
* Improve drawing code: make sure the border around the termview is
repainted, and do not leave a 1px space between lines unpainted.

Handle colors.

Resize terminal buffer with window.

Unlike in Haiku terminal, vterm does not rearrange lines wen they
are wrapped. Chars outside the viewing area are just lost.

Fix display for basic stuff.

Working serial connection.
Still need some work on displaying the right chars at the right place.

WIP version of SerialConnect. Not working, but added to the tree anyway so :
* You can code review it
* You can help developping
Uses libvterm as the backend for parsing ANSI escape sequences. The lib was
changed slightly to build with GCC2. It could be used by Terminal as well as
it seems cleaner and more reliable than our current parser.

Use strict mode when url-decoding file requests.

We don't want '+' to become a space here.
Fixes #11109.

SerialConnect: fix return and backspace keys.

Style fixes.

Translate arrow keys to VT100 escape sequences

* I think this is what everyone expects.

SerialConnect: some simplifications

* Use integers for x and y coordinates in the draw loop, too
* Simplify _GetCell by using the return value of vterm_screen_get_cell
to detect out of bounds access, instead of testing for that manually.

Avoid calling PenLocation for every char.

PenLocation is retrieved from app_server (because DrawString changes it
there), so this made drawing very slow.

SerialConnect: draw the cursor.

* Drawn as "inverse video" for now.
* Should use VTerm state to get the cursor shape (rect, underline or
left line)
* Should also handle blinking if enabled, and visibility.

Build fix.

SerialConnect: use ints for font metrics

As pointed by Ingo, using a float here is useless because we want each
line to be the same integer number of pixels. Now thigs are drawn
properly and the view has the exact same size as Terminal's one (tested
with font sizes 10 and 18, so different leading values don't seem to be
a problem).

Thanks for reviewing!

SerialConnect: implement scrollback.

SerialConnect: fix font metrics for good.

* Set the background color in AttachedToWindow to avoid white lines in
initial drawing,
* Fix computation of font size again so lines don't overlap.

Note: lines are apparently spaced 1px less than in Terminal. But they
don't seem to touch or overlap each other in SerialConnect.

Fixes CID 1162805, 1162804, 1162773, 1162759.

Make SerialConnect more complete

* Mark the current connected device, or disable "Disconnect" menu when
there is no connection.
* Save and restore serial port settings
* Improve drawing code: make sure the border around the termview is
repainted, and do not leave a 1px space between lines unpainted.

Handle colors.

Resize terminal buffer with window.

Unlike in Haiku terminal, vterm does not rearrange lines wen they
are wrapped. Chars outside the viewing area are just lost.

Fix display for basic stuff.

Working serial connection.
Still need some work on displaying the right chars at the right place.

WIP version of SerialConnect. Not working, but added to the tree anyway so :
* You can code review it
* You can help developping
Uses libvterm as the backend for parsing ANSI escape sequences. The lib was
changed slightly to build with GCC2. It could be used by Terminal as well as
it seems cleaner and more reliable than our current parser.