This patch adds a new configuration option,
‘osc8-underline=url-mode|always’.
When set to ‘url-mode’, OSC-8 URLs are only
highlighted (i.e. underlined) in url-mode, just like auto-detected
URLs.
When set to ‘always’, they are always underlined, regardless of mode,
and regardless of their other attributes.
This is implemented by tagging collected URLs with a boolean,
instructing urls_render() and urls_reset() whether they should update
the cells’ ‘url’ attribute or not.
The OSC-8 collecter sets this based on the value of ‘osc8-underline’.
Finally, when closing an OSC-8 URL, the cells are immediately tagged
with the ‘url’ attribute if ‘osc8-underline’ is set to ‘always’.
URI ranges are per row. Translate by detecting URI range start/end
coordinates, and opening and closing a corresponding URI range on the
new grid.
We need to take care when line-wrapping the new grid; here we need to
manually close the still-open URI ranges (on the new grid), and
re-opening them on the next row.
If the client application emitted e.g:
\E]8;;http://foo\E\\\E]8;;\E\\
i.e. an anchor without content, then we ended up with an ‘end’
coordinate that lied *before* the ‘start’ coordinate, since we
subtract one (column) from the end point to make it inclusive.
By default, the URL isn’t shown on the jump-label. For auto-detect
URLs, doing so is virtually always useless, as the URL is already
visible in the grid.
For OSC-8 URLs however, the URL is often _not_ visible in the
grid. Many times, seeing the URL is still not needed (if you’re doing
‘ls --hyperlink’, you already know what the URIs are).
But it is still useful to have a way to show the URLs.
This patch adds a new key binding action that can be used in url-mode
to toggle the URL on and off in the jump label.
It is bound to ctrl+t by default.
Remove URLs with the same start and end coordinates. Such duplicate
URLs can be created by emitting an OSC-8 URL with matching grid
content:
\E]8;;http://foo\E\\http://foo\E]8;;\E\\
Doing so means the next OSC-8 URL emitted by the client application,
with the same ID, will get a *new* id internally.
Instead, hash the string and use that as ID.
In case an URL is split up into multiple parts, those parts are now
treated as a single URL when it comes to key assignment.
Only the *first* URL part is actually assigned a key combo. The other
parts are ignored.
We still highlight them, but for all other purposes they are ignored.
Applications can assign an ID to the URL. This is used to associate
the parts of a split up URL with each other:
╔═ file1 ════╗
║ ╔═ file2 ═══╗
║http://exa║Lorem ipsum║
║le.com ║ dolor sit ║
║ ║amet, conse║
╚══════════║ctetur adip║
╚═══════════╝
In the example above, ‘http://exa’ and ‘le.com’ are part of the same
URL, but by necessity split up into two OSC-8 URLs.
If the application sets the same ID for those two OSC-8 URLs, the
terminal can ensure they are handled as one.
Things left to do: since OSC-8 URLs are stored as ranges in the
per-row ‘extra’ data member, we currently do not handle line-wrapping
URLs very well; they will be considered two separate URLs, and
assigned two different key sequences.
These functions update the OSC-8 URI state in the terminal.
term_osc8_open() tracks the beginning of an URL, by storing the start
coordinate (i.e. the current cursor location), along with the URL
itself.
Note that term_osc8_open() may not be called with an empty URL. This
is important to notice, since the way OSC-8 works, applications close
an URL by “opening” a new, empty one:
\E]8;;https://foo.bar\e\\this is an OSC-8 URL\E]8;;\e\\
It is up to the caller to check for this, and call term_osc8_close()
instead of term_osc8_open() when the URL is empty.
However, it is *also* valid to switch directly from one URL to
another:
\E]8;;http://123\e\\First URL\E]8;;http//456\e\\Second URL\E]8;;\e\\
This use-case *is* handled by term_osc8_open().
term_osc8_close() uses the information from term_osc8_open() to add
per-row URL data (using the new ‘extra’ row data).
This patch adds an ‘extra’ member to the row struct. It is a pointer
to a struct containing extra data to be associated with this row.
Initially, this struct contains a list of URL ranges. These
define (OSC-8) URLs on this row.
The ‘extra’ data is allocated on-demand. I.e. the pointer is NULL by
default; it is *not* allocated by grid_row_alloc().
The only time the URL is actually in UTF-32 is when we’re collecting
it (auto-detecting it) from the grid, since cells store their
character(s) in UTF-32.
Everything *after* that prefers the URL in UTF-8. So, do the
conversion while collecting the URL.
This patch also changes the URL activation code to strip the
‘file://user@host/’ prefix from file URIs that refer to files
on the *local* computer.
slave: no need to restore signal handlers; they are automatically
restored as long as they are not SIG_IGN (which they never are in
foot).
spawn(): restore signal mask after fork. This fixes an issue where a
terminal spawned with ctrl+shift+n did not terminate when its shell
exited.
Closes#366
