For the sake of interoperability. This means that doing a DECRC without
a prior DECSC is now undefined. However, one can now issue multiple
DECRC for a single DECSC. Fixes#1264
Enabled by default add new option `detect_urls` that will allow you
contorl if kitty should detect URLs under the mouse cursor. If disabled
the URLs are still clickable with open_url_modifiers.
There are two user-visible changes in here:
1. If a scroll region is set such that there is a bottom margin and no
top margin, scrolling the region forward used to discard the top
lines. Now those lines are appended to the scrollback.
```shell
# Assuming a terminal window with 24 lines.
printf '\033[H\033[J\033[3J\033[0;5r' && seq 100
```
This command used to result in an empty scrollback. Now it contains
the numbers 1-96.
2. If a scroll region is set such that there is a top margin and no bottom
margin, scrolling the region forward used to append the top lines to
the scrollback. Now these lines are discarded.
```shell
# Assuming a terminal window with 24 lines.
printf '\033[H\033[J\033[3J\033[2;24r' && seq 100
```
This command used to populate scrollback with the numbers 2-78. Now
the scrollback is empty. The numbers on the screen are the same as
before: 1 and 79-100.
Related issue: #3113.
The scheme used in draw_sextant works well enough, but the
feed was broken. 21 and 42 need to be skipped, not 20 and
40. Without this change, the following glyphs are broken:
U+1FB13 BLOCK SEXTANT-35 🬓 renders as LEFT HALF
U+1FB26 BLOCK SEXTANT-46 🬦 renders as SEXTANT-146
U+1FB27 BLOCK SEXTANT-146 🬧 renders as RIGHT HALF
With this change, the entirety of the sextant block works
correctly. Found debugging the Notcurses sextant blitter:
https://github.com/dankamongmen/notcurses/issues/1112
`create_os_window()` calls `get_window_content_scale()` without initializing the `xscale` and `yscale` variables. Instead of initializing them everywhere, where this function is called, just do it once in the function itself.
Found with the Clang Static Analyzer.
When selecting text by dragging upwards, the "end" of the selection is above the "start". This causes the `selection_has_screen_line()` to never return `true` in this case.
In practice this bug causes the selection to not be cleared when the screen contents under the selection change if it was made by dragging upwards.
