a builtin to put the pane taglines at the bottom

5 files changed, 762 insertions, 58 deletions

diff --git a/test/snapshots/builtins.golden b/test/snapshots/builtins.golden
index afee3f3f..7e4b3366 100644
--- a/test/snapshots/builtins.golden
+++ b/test/snapshots/builtins.golden
@@ -153,7 +153,6 @@
 |
 |
 |  /tmp/pardes-snap/builtins/cwd/+Help                                                        New Del
-|    24 SPC l i   Lspinfo
 |    25 SPC l k   Hover
 |    26 SPC l r   Rename
 |    27 SPC l s   Symbols
@@ -161,26 +160,27 @@
 |    29 SPC s d   Dump            topbar
 |    30 SPC s r   Restore
 |    31 SPC t a   Ascii
-|    32 SPC t c   Colors
-|    33 SPC t d   Debug           topbar
-|    34 SPC t i   PdfTint
-|    35 SPC t l   Palette
-|    36 SPC t n   NextColor       topbar
-|    37 SPC t p   Petscii
-|    38 SPC t r   Crt
-|    39 SPC t s   PdfSections
-|    40 SPC t t   ThemeSel
-|    41 SPC t w   Wrap
-|    42 SPC t z   PdfFit
-|    43 SPC w h   Left            C-w h, C-w left
-|    44 SPC w j   Down            C-w j, C-w down
-|    45 SPC w k   Up              C-w k, C-w up
-|    46 SPC w l   Right           C-w l, C-w right
-|    47           Look            enter, right-click
-|    48           Exec            tab, middle-click
-|    49           Theme
-|    50           Shell
-|    51
+|    32 SPC t b   Tagbottom
+|    33 SPC t c   Colors
+|    34 SPC t d   Debug           topbar
+|    35 SPC t i   PdfTint
+|    36 SPC t l   Palette
+|    37 SPC t n   NextColor       topbar
+|    38 SPC t p   Petscii
+|    39 SPC t r   Crt
+|    40 SPC t s   PdfSections
+|    41 SPC t t   ThemeSel
+|    42 SPC t w   Wrap
+|    43 SPC t z   PdfFit
+|    44 SPC w h   Left            C-w h, C-w left
+|    45 SPC w j   Down            C-w j, C-w down
+|    46 SPC w k   Up              C-w k, C-w up
+|    47 SPC w l   Right           C-w l, C-w right
+|    48           Look            enter, right-click
+|    49           Exec            tab, middle-click
+|    50           Theme
+|    51           Shell
+|    52
 == snap not-a-picker grid=120x60 cursor=7,58
 |New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
 |  /tmp/pardes-snap/builtins/cwd/notes.txt                                               Save New Del
@@ -214,7 +214,6 @@
 |
 |
 |  /tmp/pardes-snap/builtins/cwd/+Help                                                        New Del
-|    24 SPC l i   Lspinfo
 |    25 SPC l k   Hover
 |    26 SPC l r   Rename
 |    27 SPC l s   Symbols
@@ -222,26 +221,27 @@
 |    29 SPC s d   Dump            topbar
 |    30 SPC s r   Restore
 |    31 SPC t a   Ascii
-|    32 SPC t c   Colors
-|    33 SPC t d   Debug           topbar
-|    34 SPC t i   PdfTint
-|    35 SPC t l   Palette
-|    36 SPC t n   NextColor       topbar
-|    37 SPC t p   Petscii
-|    38 SPC t r   Crt
-|    39 SPC t s   PdfSections
-|    40 SPC t t   ThemeSel
-|    41 SPC t w   Wrap
-|    42 SPC t z   PdfFit
-|    43 SPC w h   Left            C-w h, C-w left
-|    44 SPC w j   Down            C-w j, C-w down
-|    45 SPC w k   Up              C-w k, C-w up
-|    46 SPC w l   Right           C-w l, C-w right
-|    47           Look            enter, right-click
-|    48           Exec            tab, middle-click
-|    49           Theme
-|    50           Shell
-|    51
+|    32 SPC t b   Tagbottom
+|    33 SPC t c   Colors
+|    34 SPC t d   Debug           topbar
+|    35 SPC t i   PdfTint
+|    36 SPC t l   Palette
+|    37 SPC t n   NextColor       topbar
+|    38 SPC t p   Petscii
+|    39 SPC t r   Crt
+|    40 SPC t s   PdfSections
+|    41 SPC t t   ThemeSel
+|    42 SPC t w   Wrap
+|    43 SPC t z   PdfFit
+|    44 SPC w h   Left            C-w h, C-w left
+|    45 SPC w j   Down            C-w j, C-w down
+|    46 SPC w k   Up              C-w k, C-w up
+|    47 SPC w l   Right           C-w l, C-w right
+|    48           Look            enter, right-click
+|    49           Exec            tab, middle-click
+|    50           Theme
+|    51           Shell
+|    52
 == snap window-group grid=120x60 cursor=7,32
 |New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
 |  /tmp/pardes-snap/builtins/cwd/notes.txt                                               Save New Del
diff --git a/test/snapshots/leader.golden b/test/snapshots/leader.golden
index 9398b158..74719f13 100644
--- a/test/snapshots/leader.golden
+++ b/test/snapshots/leader.golden
@@ -393,19 +393,19 @@
 |     1 pardes builtins under SPC t
 |     2
 |     3 SPC t a   Ascii
-|     4 SPC t c   Colors
-|     5 SPC t d   Debug           topbar
-|     6 SPC t i   PdfTint
-|     7 SPC t l   Palette
-|     8 SPC t n   NextColor       topbar
-|     9 SPC t p   Petscii
-|    10 SPC t r   Crt
-|    11 SPC t s   PdfSections
-|    12 SPC t t   ThemeSel
-|    13 SPC t w   Wrap
-|    14 SPC t z   PdfFit
-|    15
-|
+|     4 SPC t b   Tagbottom
+|     5 SPC t c   Colors
+|     6 SPC t d   Debug           topbar
+|     7 SPC t i   PdfTint
+|     8 SPC t l   Palette
+|     9 SPC t n   NextColor       topbar
+|    10 SPC t p   Petscii
+|    11 SPC t r   Crt
+|    12 SPC t s   PdfSections
+|    13 SPC t t   ThemeSel
+|    14 SPC t w   Wrap
+|    15 SPC t z   PdfFit
+|    16
 |
 |
 == snap help-window grid=100x40 cursor=7,22
diff --git a/test/snapshots/leader.snap b/test/snapshots/leader.snap
index c71aaee6..db212631 100644
--- a/test/snapshots/leader.snap
+++ b/test/snapshots/leader.snap
@@ -66,9 +66,10 @@ key ?
 wait 10000 SPC c n
 stable 700 15000
 snap help-all
-# `SPC t ?`: the toggle group, seven of them now that the image renderer
-# switches are builtins instead of words in the image tag — Crt sits past this
-# pane's last row in the full listing above, and only a group filter shows it
+# `SPC t ?`: the toggle group, twelve of them now that the image renderer
+# switches and the PDF ones are builtins instead of words in the image tag —
+# Crt sits past this pane's last row in the full listing above, and only a
+# group filter shows it
 key space
 key t
 key ?
diff --git a/test/snapshots/tagbottom.golden b/test/snapshots/tagbottom.golden
new file mode 100644
index 00000000..cc402fd1
--- /dev/null
+++ b/test/snapshots/tagbottom.golden
@@ -0,0 +1,549 @@
+== snap boot grid=100x30 cursor=7,2
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt                            Save New Del
+|     1 aaa
+|     2 bbb
+|     3 ccc
+|     4 ddd
+|     5 eee
+|     6 fff
+|     7 ggg
+|     8 hhh
+|     9 iii
+|    10 jjj
+|    11 kkk
+|    12 lll
+|    13 mmm
+|    14 nnn
+|    15 ooo
+|    16 ppp
+|    17 qqq
+|    18 rrr
+|    19 sss
+|    20 ttt
+|    21 uuu
+|    22 vvv
+|    23 www
+|    24 xxx
+|    25 yyy
+|    26 zzz
+|
+|
+== snap on grid=100x30 cursor=7,1
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|     1 aaa
+|     2 bbb
+|     3 ccc
+|     4 ddd
+|     5 eee
+|     6 fff
+|     7 ggg
+|     8 hhh
+|     9 iii
+|    10 jjj
+|    11 kkk
+|    12 lll
+|    13 mmm
+|    14 nnn
+|    15 ooo
+|    16 ppp
+|    17 qqq
+|    18 rrr
+|    19 sss
+|    20 ttt
+|    21 uuu
+|    22 vvv
+|    23 www
+|    24 xxx
+|    25 yyy
+|    26 zzz
+|
+|
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt                            Save New Del
+== snap off grid=100x30 cursor=7,2
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt                            Save New Del
+|     1 aaa
+|     2 bbb
+|     3 ccc
+|     4 ddd
+|     5 eee
+|     6 fff
+|     7 ggg
+|     8 hhh
+|     9 iii
+|    10 jjj
+|    11 kkk
+|    12 lll
+|    13 mmm
+|    14 nnn
+|    15 ooo
+|    16 ppp
+|    17 qqq
+|    18 rrr
+|    19 sss
+|    20 ttt
+|    21 uuu
+|    22 vvv
+|    23 www
+|    24 xxx
+|    25 yyy
+|    26 zzz
+|
+|
+== snap tag-typed grid=100x30 cursor=60,29
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|     1 aaa
+|     2 bbb
+|     3 ccc
+|     4 ddd
+|     5 eee
+|     6 fff
+|     7 ggg
+|     8 hhh
+|     9 iii
+|    10 jjj
+|    11 kkk
+|    12 lll
+|    13 mmm
+|    14 nnn
+|    15 ooo
+|    16 ppp
+|    17 qqq
+|    18 rrr
+|    19 sss
+|    20 ttt
+|    21 uuu
+|    22 vvv
+|    23 www
+|    24 xxx
+|    25 yyy
+|    26 zzz
+|
+|
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt          bottom.txt                   Save New Del
+== snap look-bottom-tag grid=100x30 cursor=7,16
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|     1 aaa
+|     2 bbb
+|     3 ccc
+|     4 ddd
+|     5 eee
+|     6 fff
+|     7 ggg
+|     8 hhh
+|     9 iii
+|    10 jjj
+|    11 kkk
+|    12 lll
+|    13 mmm
+|    14 nnn
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt          bottom.txt                   Save New Del
+|     1 ZZONE
+|     2 ZZTWO
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  /tmp/pardes-snap/tagbottom/cwd/bottom.txt                         Save New Del
+== snap body-cursor grid=100x30 cursor=9,5
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|     1 aaa
+|     2 bbb
+|     3 ccc
+|     4 ddd
+|     5 eee
+|     6 fff
+|     7 ggg
+|     8 hhh
+|     9 iii
+|    10 jjj
+|    11 kkk
+|    12 lll
+|    13 mmm
+|    14 nnn
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt          bottom.txt                   Save New Del
+|     1 ZZONE
+|     2 ZZTWO
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  /tmp/pardes-snap/tagbottom/cwd/bottom.txt                         Save New Del
+== snap seam-noop grid=100x30 cursor=9,5
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|     1 aaa
+|     2 bbb
+|     3 ccc
+|     4 ddd
+|     5 eee
+|     6 fff
+|     7 ggg
+|     8 hhh
+|     9 iii
+|    10 jjj
+|    11 kkk
+|    12 lll
+|    13 mmm
+|    14 nnn
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt          bottom.txt                   Save New Del
+|     1 ZZONE
+|     2 ZZTWO
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  /tmp/pardes-snap/tagbottom/cwd/bottom.txt                         Save New Del
+== snap seam-dragged grid=100x30 cursor=9,5
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|     1 aaa
+|     2 bbb
+|     3 ccc
+|     4 ddd
+|     5 eee
+|     6 fff
+|     7 ggg
+|     8 hhh
+|     9 iii
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt          bottom.txt                   Save New Del
+|     1 ZZONE
+|     2 ZZTWO
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  /tmp/pardes-snap/tagbottom/cwd/bottom.txt                         Save New Del
+== snap wheel-body grid=100x30 cursor=9,1
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|     5 eee
+|     6 fff
+|     7 ggg
+|     8 hhh
+|     9 iii
+|    10 jjj
+|    11 kkk
+|    12 lll
+|    13 mmm
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt          bottom.txt                   Save New Del
+|     1 ZZONE
+|     2 ZZTWO
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  /tmp/pardes-snap/tagbottom/cwd/bottom.txt                         Save New Del
+== snap wheel-gutter grid=100x30 cursor=9,2
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|     4 ddd
+|     5 eee
+|     6 fff
+|     7 ggg
+|     8 hhh
+|     9 iii
+|    10 jjj
+|    11 kkk
+|    12 lll
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt          bottom.txt                   Save New Del
+|     1 ZZONE
+|     2 ZZTWO
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  /tmp/pardes-snap/tagbottom/cwd/bottom.txt                         Save New Del
+== snap gutter-click grid=100x30 cursor=9,4
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|     2 bbb
+|     3 ccc
+|     4 ddd
+|     5 eee
+|     6 fff
+|     7 ggg
+|     8 hhh
+|     9 iii
+|    10 jjj
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt          bottom.txt                   Save New Del
+|     1 ZZONE
+|     2 ZZTWO
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  /tmp/pardes-snap/tagbottom/cwd/bottom.txt                         Save New Del
+== snap search-prompt grid=100x30 cursor=6,11
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|     2 bbb
+|     3 ccc
+|     4 ddd
+|     5 eee
+|     6 fff
+|     7 ggg
+|     8 hhh
+|     9 iii
+|    10 jjj
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt          bottom.txt                   Save New Del
+|   /ZZ
+|     2 ZZTWO
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  /tmp/pardes-snap/tagbottom/cwd/bottom.txt                         Save New Del
+== snap leader grid=100x30 cursor=9,13
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|     2 bbb
+|     3 ccc
+|     4 ddd
+|     5 eee
+|     6 fff
+|     7 ggg
+|     8 hhh
+|     9 iii
+|    10 jjj
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt          bottom.txt                   Save New Del
+|                                                                                                 SPC
+|     2 ZZTWO
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  /tmp/pardes-snap/tagbottom/cwd/bottom.txt                         Save New Del
+== style sweep-down
+|0: 0-56 #949494,#121212, 57-99 d,#121212,
+|1: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-9 #bdbdbd,#080808, 10-99 d,#080808,
+|2: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-9 #bdbdbd,#080808, 10-99 d,#080808,
+|3: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-7 #080808,#9399f9, 8-9 #bdbdbd,#080808, 10-99 d,#080808,
+|4: 0-0 d,#121212, 1-1 d,#080808, 2-6 #949494,#121212, 7-7 #080808,#9399f9, 8-9 #bdbdbd,#080808, 10-99 d,#080808,
+|5: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-7 #080808,#9399f9, 8-9 #bdbdbd,#080808, 10-99 d,#080808,
+|6: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-7 #080808,#9399f9, 8-9 #bdbdbd,#080808, 10-99 d,#080808,
+|7: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-7 #080808,#9399f9, 8-9 #bdbdbd,#080808, 10-99 d,#080808,
+|8: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-7 #080808,#9399f9, 8-9 #bdbdbd,#080808, 10-99 d,#080808,
+|9: 0-0 d,#121212, 1-1 d,#080808, 2-6 #626262,#080808, 7-7 #080808,#9399f9, 8-9 #bdbdbd,#080808, 10-99 d,#080808,
+|10: 0-1 #ffffff,#626262, 2-90 #949494,#121212, 91-99 d,#121212,
+|11: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-11 #bdbdbd,#080808, 12-99 d,#080808,
+|12: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-11 #bdbdbd,#080808, 12-99 d,#080808,
+|13: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|14: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|15: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|16: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|17: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|18: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|19: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|20: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|21: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|22: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|23: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|24: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|25: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|26: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|27: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|28: 0-0 d,#444444, 1-1 d,#080808, 2-6 #626262,#080808, 7-99 d,#080808,
+|29: 0-1 #ffffff,#262626, 2-79 #949494,#121212, 80-99 d,#121212,
+== snap cut-down grid=100x30 cursor=7,4
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|     1 aaa
+|     2 bbb
+|     3 ccc
+|     4 jj
+|     5 kkk
+|     6 lll
+|     7 mmm
+|     8 nnn
+|     9 ooo
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt          bottom.txt                   Save New Del
+|     1 ZZONE
+|     2 ZZTWO
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|
+|  /tmp/pardes-snap/tagbottom/cwd/bottom.txt                         Save New Del
+== file cut-buffer
+aaa
+bbb
+ccc
+jj
+kkk
+lll
+mmm
+nnn
+ooo
+ppp
+qqq
+rrr
+sss
+ttt
+uuu
+vvv
+www
+xxx
+yyy
+zzz
+== end file
+== snap del-bottom-tag grid=100x30 cursor=7,4
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|     1 aaa
+|     2 bbb
+|     3 ccc
+|     4 jj
+|     5 kkk
+|     6 lll
+|     7 mmm
+|     8 nnn
+|     9 ooo
+|    10 ppp
+|    11 qqq
+|    12 rrr
+|    13 sss
+|    14 ttt
+|    15 uuu
+|    16 vvv
+|    17 www
+|    18 xxx
+|    19 yyy
+|    20 zzz
+|
+|
+|
+|
+|
+|
+|
+|
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt          bottom.txt                   Save New Del
+== snap off-again grid=100x30 cursor=7,5
+|New Newcol Find Grep Help Tutor Dump NextColor Debug Kill
+|  /tmp/pardes-snap/tagbottom/cwd/top.txt          bottom.txt                   Save New Del
+|     1 aaa
+|     2 bbb
+|     3 ccc
+|     4 jj
+|     5 kkk
+|     6 lll
+|     7 mmm
+|     8 nnn
+|     9 ooo
+|    10 ppp
+|    11 qqq
+|    12 rrr
+|    13 sss
+|    14 ttt
+|    15 uuu
+|    16 vvv
+|    17 www
+|    18 xxx
+|    19 yyy
+|    20 zzz
+|
+|
+|
+|
+|
+|
+|
+|
diff --git a/test/snapshots/tagbottom.snap b/test/snapshots/tagbottom.snap
new file mode 100644
index 00000000..801df1a8
--- /dev/null
+++ b/test/snapshots/tagbottom.snap
@@ -0,0 +1,154 @@
+# Tagbottom: every pane's tagline on its LAST row instead of its first, and
+# the transient message row (prompts, messages, the SPC indicator) at the other
+# end with it. One global bool, so the whole screen flips at once.
+#
+# The two things worth pinning here are not pixels. The first is that a click
+# still lands where it looks like it lands: the Sel coordinate space is
+# UNCHANGED (row 0 is the tag, the body starts at BOX_H) and the mouse maps a
+# screen row into it, so a look or an execute on a bottom tagline acts on the
+# word under the pointer instead of silently sweeping whatever body row shares
+# that number. Every mouse assertion below is therefore a CONSEQUENCE — a pane
+# appearing, a pane going away, a view scrolling by a counted number of rows —
+# and not a picture of a highlight. The tagline-execute pair is what caught the
+# bug this script exists for: before the tag row got its own arm in the
+# execute/look press, both ran a blank body row and a golden recorded the
+# no-op as if it had passed.
+# The second is that turning it back off restores the top-tagline layout
+# exactly: `off` is byte-for-byte `boot`, cursor included.
+file top.txt aaa\nbbb\nccc\nddd\neee\nfff\nggg\nhhh\niii\njjj\nkkk\nlll\nmmm\nnnn\nooo\nppp\nqqq\nrrr\nsss\nttt\nuuu\nvvv\nwww\nxxx\nyyy\nzzz
+file bottom.txt ZZONE\nZZTWO
+start 30 100 top.txt
+wait 8000 New Newcol
+wait 8000 top.txt
+stable 700 20000
+snap boot
+# SPC t b. The tag leaves row 1 for row 29, the body slides up one row, and
+# the cursor goes with it (7,2 -> 7,1) because it is on the same file line.
+key space t b
+stable 700 15000
+snap on
+# ...and straight back. This grid must equal `boot`'s, to the cell.
+key space t b
+stable 700 15000
+snap off
+key space t b
+stable 700 15000
+# CLICK the bottom tagline (col 50 of row 30, the pane's last row) and type
+# into it. A clicked tag is insert mode, so the text lands as text, and the
+# cursor is down on the tagline with it. Col 50 is past the end of the path,
+# which is read-only — a click inside it parks the cursor there and the typing
+# goes nowhere.
+press left 50 30
+release left 50 30
+stable 400 5000
+send \x20bottom.txt
+stable 600 8000
+stable 400 5000
+snap tag-typed
+# ...and LOOK the word just typed, from that same bottom tagline: bottom.txt
+# opens as a second pane below. It only can if the press was mapped to the tag
+# — mapped as a body row it lands on blank line 29 and looks nothing at all.
+press right 55 30
+release right 55 30
+wait 10000 ZZONE
+stable 700 15000
+snap look-bottom-tag
+# a body click in the UPPER pane: the cursor lands on the row under the
+# pointer, counted from the pane's first row rather than from a tag that is no
+# longer there. Row 6 is grid row 5, the fifth body row, file line 5.
+press left 10 6
+release left 10 6
+stable 400 8000
+snap body-cursor
+# The h-resize seam. With top taglines it is the upper pane's LAST row; here
+# that row is the upper pane's TAG, so the handle is the lower pane's FIRST row
+# (grid 16, click row 17). A no-drag click on it must leave both sizes alone.
+press left 40 17
+release left 40 17
+motion 40 25
+stable 500 8000
+snap seam-noop
+# ...and the real drag, five rows up: the upper pane keeps 10 rows, the lower
+# grows to 19. Both taglines follow their own pane's bottom.
+press left 40 17
+drag left 40 12
+release left 40 12
+motion 40 25
+stable 500 8000
+snap seam-dragged
+# the wheel over the BODY of the upper pane (nine body rows now): four rows
+# down, so the view starts at line 5 and the pinned cursor rides up to the
+# pane's first row
+wheel down 40 4
+wheel down 40 4
+wheel down 40 4
+wheel down 40 4
+stable 400 8000
+snap wheel-body
+# ...and one row back up with the wheel over the GUTTER: the same pane, found
+# through its gutter column. View at line 4.
+wheel up 1 4
+stable 400 8000
+snap wheel-gutter
+# a left click in the gutter scrolls UP to the clicked row, and the row it
+# counts from is the BODY's first, not r.y + BOX_H. Row 4 is grid row 3, the
+# third body row: two rows up, to line 2. Counted from the wrong end it would
+# be one row up, to line 3.
+press left 1 4
+release left 1 4
+stable 400 8000
+snap gutter-click
+# `/` in the lower pane's body arms the search input. The prompt is CUT off the
+# tagline and drawn on the message row with the cursor — and with Tagbottom
+# those two are at opposite ends of the pane: the tail keeps its builtins on
+# row 29 while `/ZZ` and the cursor sit up on row 11, the lower pane's first.
+press left 10 14
+release left 10 14
+stable 400 5000
+key /
+send ZZ
+stable 600 8000
+stable 400 5000
+snap search-prompt
+key esc
+settle 100
+stable 400 5000
+# the SPC leader indicator lives on that same message row, right-aligned
+key space
+stable 400 5000
+snap leader
+key esc
+settle 100
+stable 400 5000
+# THE INVERSION. Sweeping DOWN past the last body row is the ordinary "select
+# to the end" gesture, and with the tag drawn BELOW the body it lands on the
+# tagline — Sel row 0. Unclamped that drives the selection's far end to the TOP
+# of Sel space: the highlight jumps ABOVE the anchor and a 1-2 Cut deletes lines
+# nobody swept. Anchored on grid row 3 (file line 4) and dragged onto the upper
+# pane's tag row, the sweep must cover lines 4..10 downward, not 2..4 upward.
+press left 8 4
+drag left 8 11
+stable 400 5000
+snapstyle sweep-down
+# ...and the proof is the BUFFER, not the highlight: 1-2 Cut the sweep, save,
+# and read the file back. aaa/bbb/ccc survive and kkk..zzz survive; unclamped
+# this file lost bbb/ccc/ddd instead and kept eee onward.
+press middle 8 11
+release middle 8 11
+release left 8 11
+stable 400 5000
+snap cut-down
+key space f s
+stable 700 15000
+snapfile cut-buffer /tmp/pardes-snap/tagbottom/cwd/top.txt
+# EXECUTE `Del` on the lower pane's bottom tagline: the pane goes away and the
+# upper one takes the whole column back. The middle button's half of the same
+# tag mapping the look used above.
+press middle 78 30
+release middle 78 30
+stable 700 15000
+snap del-bottom-tag
+# and off again, one pane, its tagline back on row 1 with the body under it
+key space t b
+stable 700 15000
+snap off-again