When adding a new `BufPane` it is always being inserted last into `MainTab().Panes`.
This leads to a confusion when using the actions `PreviousSplit`, `NextSplit` as the previous/next split may not be the expected one.
How to reproduce:
- Launch micro and insert char "1"
- Open a new vsplit via the command `vsplit` and insert "2"
- Switch back to the left split (1) by using `PreviousSplit`
- Again open a new vsplit via command: `vsplit` and type char "3"
- Now switch between the 3 splits using `PreviousSplit`, `NextSplit`
Switching from most left split to the most right, the expected order would be 1, 3, 2 but actually is 1, 2, 3.
Fix regression caused by the fix 0de16334d3 ("micro: Don't forward
nil events into the sub event handler"): even if the terminal was
started with `wait` set to false, it is not closed immediately after
it finished its job, instead it shows "Press enter to close".
The reason is that since the commit b68461cf72 ("Terminal plugin
callback support") the termpane code has been (slightly hackily) relying
on nil events as notifications to close the terminal after it finished
its job. So fix this by introducing a separate CloseTerms() function
for notifying termpanes about that, decoupled from HandleEvent() which
is for tcell events only.
Currently onSetActive is called when the user clicks with the mouse on
a pane even if this pane is already active. We should avoid calling it
in this case.
Implementation detail: like with tabs in the previous commit, we cannot
check if the pane is already active just by checking the index passed
to the Tab's SetActive() (since the index may not change while the pane
itself changes), we need to check state of the pane itself. So we move
the onSetActive invocation from the Tab's SetActive() to the BufPane's
SetActive().
We should call the onSetActive callback not only when switching to
another bufpane within the same tab but also when switching to another
tab.
Note on implementation details:
- In SetActive() we need to check if the tab is not already active, to
avoid calling onSetActive for an already active bufpane.
- We cannot check that just by checking if the tab index passed to
SetActive() is different from the current active tab index, since this
index may remain the same even if the tab itself is different (in the
case of removing a tab from the tablist). So we need to check the tab
itself, not just the tab index. So we introduce the isActive field,
to track the tab's active state in the Tab structure itself.
Since now bufpane handles mouse move and release events generically and
separately from mouse press events, that creates a mess when we dispatch
a mouse press event to an inactive pane without making it active.
For example:
1. Click the right button on an inactive pane. It remains inactive.
2. Then click the left button on it. It becomes active, and an
unexpected text selection appears.
The reason is that the release event for the first click was dispatched
to a wrong pane - the (then) active one, so the (then) inactive pane
didn't get the release event and treats the second click not as a mouse
press but as a mouse move.
The simplest way to fix it is to avoid this scenario entirely, i.e.
always activate the pane when clicking any mouse button on it, not just
the left button.
For mouse wheel motion events we keep the existing behavior: the pane
gets the event but doesn't become active. Mouse wheel motion events are
not affected by the described issue, as they have no paired "release"
events.
When we temporarily disable the screen (e.g. during TermMessage or
RunInteractiveShell), if the mouse is pressed when the screen is still
active and then released when the screen is already stopped, we aren't
able to catch this mouse release event, so we erroneously think that the
mouse is still pressed after the screen is restarted. This results in
wrong behavior due to a mouse press event treated as a mouse move event,
e.g. upon the left button click we see an unexpected text selection.
So need to reset the mouse release state to "released" after restarting
the screen, assuming it is always released when the screen is restarted.
Adds config option `multimode`, which takes values `tab`, `vsplit`,
or `hsplit` (corresponding to the file-opening commands). I mean to
use it with a command line like
micro -multimode vsplit foo.h foo.c
to open files in a side-by-side split, but if one really wanted to
one could set it in the config file to change the default behavior of
opening multiple files in tabs.
Fix the 2nd part of #1773: resize via mouse drag doesn't work if the
split on the left contains other splits, i.e. is not a leaf node.
The problem is that only leaf nodes have unique id. For non-leaf nodes
ID() returns 0. So we shouldn't search the node by id.
So replace GetMouseSplitID() with GetMouseSplitNode().
