* [DRun] Introduce data structure changes for Link desktop entries
From the [freedesktop spec][1]:
> This specification defines 3 types of desktop entries:
> Application (type 1), Link (type 2) and Directory (type 3). To allow
> the addition of new types in the future, implementations should
> ignore desktop entries with an unknown type.
This commit adds an enum to capture these types, and adds `type` to
DRunModeEntry.
[1]: https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html
part of #1166
* [DRun] Sanity check Link entries and capture the URL
Note that we're introducing some logic that will differ depending on
the Desktop entry type (Application or Link). The logic is:
- if entry is Application type,
- then Exec is required
- and the value is saved in .exec
- and drun_mode_result calls exec_cmd_entry
- if entry is Link type,
- then URL is required (but is not saved in the DRunModeEntry)
- and drun_mode_result calls new function launch_link_entry
part of #1166
* [DRun] Launch desktop links via xdg-open
Note that this introduces a new dependency on xdg-open, which may not
be installed. In that case, rofi will display an error dialog
with something like:
"Failed to execute child process xdg-open (No such file or directory)"
which hopefully is explanatory enough for folks.
part of #1166
* Make drun options comments consistent and add a bit of whitespace
* [DRun] new config option drun-url-launcher for opening links
In previous commit, this was a hard-coded string.
part of #1166
* Improved background draw code
- Better to read (precalculated coordinates)
- Unnecessary line_to in the end
- Don't use radius in calculations if zero
* Background draw - separate rounded rect function
* Limit background & border overlap size
Overlap is too good against artifacts when stiching antialiased areas to
be avoided, unless intermediate image is used for additive stiching. But
it doesn't look good with transparent borders, when overlaping background
is visible. It seems, that 1px overlap is right enough to completely
prevent artifacts. Though things may differ if one if side is 1px or
even 0px, while adjacent is still enough thick.
* Style: alignment, less noise, limit var scope
