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Diffstat (limited to 'docs/tags.md')
| -rw-r--r-- | docs/tags.md | 68 |
1 files changed, 64 insertions, 4 deletions
diff --git a/docs/tags.md b/docs/tags.md index fdea1472..7787d7f1 100644 --- a/docs/tags.md +++ b/docs/tags.md @@ -1,8 +1,9 @@ # Editable tags Pardes has three levels of command text: the workspace tag, one tag per -column, and each pane's tag. Column commands run in that column's active -pane (or its first pane when focus comes from another column). This makes +column, and each pane's tag. Column commands act on that column and run in +its active pane (or its first pane when focus comes from another column); a +column with no pane is described under [empty columns](#empty-columns). This makes `New`, `Tty`, `Find`, and `Grep` available beside the work they act on. `New` appears only in the column tag by default; pane tags keep their own save, terminal, close, and collapse commands. `Tty` opens a new embedded terminal. @@ -152,7 +153,7 @@ upgrade to `Mode`; customized command text is preserved. ## Saved workspaces `Dump` and `Restore` preserve customized workspace and column tags, including -intentionally empty tags. New columns start with the standard column tag. +intentionally empty tags, and columns that hold no pane. New columns start with the standard column tag. Closing a column keeps surviving columns' tags; `Joincol` keeps the destination column's tag. Old dumps without these optional fields retain the defaults. The automatic `Restore` shortcut does not overwrite a customized workspace @@ -163,7 +164,66 @@ than three rows it is omitted so a pane still has room. SDL and TTY share the same tag text, editing and layout; SDL additionally uses compact font sizing and subtle pixel separators. -`ColumnTags` toggles the column row (on by default) without deleting its text. +The column row is always shown. An old `ColumnTags` line in an init file is +ignored, with a message saying so. `FocusTint` controls active-column and active-pane emphasis. SDL also honors the shared bold, underline, and strikethrough attributes, including diagnostic underlines and the optional `SyntaxBold` keyword weight. + +## Empty columns + +A column can hold no pane, as acme's can: its tag stands over blank space, the +frame's own fill, where acme paints white (cols.c:186-188). `Newcol` makes an +empty column right of the keyboard's and gives its tag the keyboard. Closing a +column's last pane (`Del`, `Del k`/`Del j`, a shell exiting, a drag to another +column) leaves the column empty where it was, and the keyboard goes to its tag +if it was on that pane. Only `Delcol` and `Joincol` take a column away. + +`Delcol` and `Joincol` from a column's tag act on that column; `Delcol` +written to a pane's ctl closes that pane's column. A pane dragged onto an +empty column fills it. + +## Where new panes go + +Every new pane goes through one placement, chosen by the `Placement` setting: +`acme` (the default) or `pardes`. `Placement pardes` or `Placement acme` sets +it, in an init file, a tag or the root ctl; bare `Placement` flips it; `SPC c +p` is its leader path, and `Config` reports it. + +`Placement acme` is acme's makenewwindow (util.c:449-495). The core keeps +acme's *active column* (activecol, dat.c:37): the column last typed in +(acme.c:487), clicked in with the select button (acme.c:659), dropped into by +a grip (acme.c:640), whose tag was given the keyboard (`Newcol`, an emptied +column, `Ctrl-w k`), or that was given the last new pane (util.c:467). A Look +click moves the keyboard but not the active column, as button 3 does not in +acme. A new pane goes into the column a command's tag belongs to when it came +from a column tag, else the active column, else the keyboard's pane's, and +never into a new column: + +- an empty column it takes whole (util.c:468-469); +- from a tag, or 9P's `pane/new` (acme's `t->w == nil`), it takes the bottom + half of the column's last pane (coladd, cols.c:62-65); +- from a pane's text (a Look, `Tty`, `Alt-n`, a Grep or Find listing), it goes + right under the text of the pane with the most blank rows when that is more + than 15 rows, or more than 3 and more than half the biggest pane + (util.c:482-486); otherwise it halves the biggest pane, or the asking pane + when that is in the column and not much smaller (util.c:487-491); +- `New` goes into its own column, the bottom half of its last pane + (look.c:921-923); +- a command pane or a `+Errors` pane goes to the last column, the bottom + half of its last pane (util.c:94-98). + +`Placement pardes` is what pardes did before: an empty column whose tag asked, +or has the keyboard, is filled; a scratch goes right under the pane that asked; +a shell under it or the nearest pane with room; a document beside the last one +read, or in a column of its own on the left when there is none and the column +is at least 200 cells wide; a command pane at the foot of the last column. + +Down from an empty column's tag stays there, and the pane-to-pane keys pass +over an empty column; Left and Right from a tag walk every column's tag. + +One divergence from acme: acme keeps running when its last window closes, +every column empty. Pardes quits when the session's last pane closes, as +`Delcol` of the last column always has. A key, a prompt or a command in +pardes runs in a pane, so a session without one would have nothing to run +them in. |