Typing a character while a selection is active deletes the selected
range first, then inserts at the left edge. Backspace and Delete
on a selection remove the whole range and consume the key. Ctrl+W
becomes dual-mode: cut (copy-to-kill + delete) when a selection is
active, existing kill-word otherwise. Alt+W copies the selection to
the kill buffer without deleting (emacs kill-ring-save). Ctrl+Y
deletes an active selection before yanking.
New helper copy_selection_to_kill_buffer reads the selected byte
range into the kill buffer via state_kill_buffer_set — same
three-tier buffer abstraction as all other kill-buffer access. The
existing delete_selection from Sprint 1 handles the removal.
Entry points patched:
- insert_char_impl, insert_utf8_char (type-over guard at top)
- handle_backspace, handle_forward_delete_char (early return)
- handle_kill_word (dual-mode cut)
- handle_yank (pre-delete before paste)
- Alt+w case in escape dispatch (dual-mode copy)
Tests: 9 new assertions in selection.yaml covering type-over,
backspace, delete, Ctrl+W cut round-trip with Ctrl+Y yank, Alt+W
copy without deletion, Ctrl+Y paste-over selection, word-wise
type-over, and regression guards for kill-word and backspace
without selection. keys.py gains M-w alias.
Extend the inlined readline redraw path with a three-segment render
when the selection is live: plain prefix, ESC[7m...ESC[27m for the
selected bytes, plain suffix. Syntax highlighting is skipped for the
whole line while a selection is active — partial-token highlighting
on the out-of-selection segments produced false command/keyword
colors, and most editors drop syntax colors inside the selection
anyway.
Reverse video is the same pattern the prefix-search renderer uses at
readline.f90:1664 — proven across Terminal.app, iTerm2, Ghostty, and
the mainstream Linux terminals. ESC[27m is used over ESC[0m to clear
only reverse video, leaving any other attributes the prompt set
behind untouched.
New local sel_start/sel_end integers are declared at subroutine scope
(not inside a block) to stay compatible with the inlined-redraw
workaround for flang-new's large-derived-type ABI bug. No new
subroutine calls — the whole render lives in the existing redraw
block.
Tests: 4 new assertions in selection.yaml that force
FORTSH_TEST_MODE=0 and match on the literal ESC[7m...ESC[27m pattern
around the selected text. Sprint 1's 15 behavioral tests still pass
(they run in test mode, skipping the full redraw path entirely).
Adjacent specs — line_editing, history, vi_mode, completion,
signals_jobs, prompt_display, stress — all clean: 267 tests total
with zero regressions.
Introduce native text selection in the emacs-mode line editor. Shift
plus every cursor movement key extends a selection anchored at the
pre-motion cursor; plain motion collapses it. Char motion snaps cursor
to the appropriate selection edge (VS Code convention). Word motion,
line-end motion, and history navigation just clear state and proceed.
Coverage:
- Shift+Left/Right/Up/Down/Home/End (xterm modifier 2)
- Ctrl+Shift+Left/Right (modifier 6) — word-wise
- Alt+Shift+B/F (ESC uppercase) — emacs-native word-wise
- Plain motion collapse guards on handle_cursor_left/right,
handle_home, handle_end, move_to_next_word, move_to_previous_word
- Buffer-replacement clears on history up/down, autosuggestion accept,
fish-style directory nav (cd .., prevd, nextd)
Dispatch uses a module-level module_extending_selection flag that the
shift-dispatch sets before calling a base handler and clears after. No
new function parameters, no new derived-type passing — keeps flang-new
stack layout unchanged.
No visible rendering yet — that's the next step. Selection state is
internal and observable via FORTSH_DEBUG_SELECTION=1 on stderr, and
behaviorally through the snap-on-collapse cursor position.
Tests: 15 new PTY assertions in selection.yaml covering every path,
including auto-collapse at anchor, history-clear, and a dir-nav
regression guard for modifier 4. keys.py gains S-*, C-S-*, M-S-*,
M-B/F aliases so YAML specs can drive the new sequences.
shell%current_command was only set in the interactive REPL loop.
In -c mode it stayed empty, causing background jobs to show
'<background job>' instead of the actual command. The POSIX job
control test checks for 'sleep' in jobs output.
Revert sleep duration back to 0.5 — the failure was not a race.
Tests with env field (like MYVAR=testvalue for variable completion)
need a fresh PTY session to inherit the custom environment. On Linux
with tests_per_session=10, reused sessions don't have the custom env.
New execute_and_capture_tabs converts newlines to tabs (not spaces),
preserving spaces in filenames. scan_directory uses it with tab-
delimited parse_ls_output for correct completion of paths like
'/tmp/test dir/' and '/tmp/quoted file.txt'.
parse_ls_output now accepts optional use_tab_delim parameter.
Fixes the final 2 completion tests: paths with spaces (9) and
quoted filenames (29). completion: 36/36 PERFECT.
Tab completion now preserves quote context: ls '/tmp/test d<Tab>
correctly wraps the completed path in matching quotes. Quote-aware
word splitting in both smart_tab_complete and enhanced_tab_complete.
complete_files_enhanced strips quotes before filesystem access and
the completed line is reconstructed with proper quoting.
Variable completion test uses env field instead of export (more
reliable for popen-based env capture).
Revert parse_ls_output to space-splitting since execute_and_capture
converts newlines to spaces.
Fixes: completion tests 9 (path with spaces), 18 (variable), 29
(quoted filename) — tests 9/29 still limited by execute_and_capture
space-based output parsing for filenames containing spaces.
#ifdef __APPLE__ had leading spaces in builtins.f90 kill signal
number blocks. gfortran requires preprocessor directives at column 1.
Also reduce ls_output buffer from 16KB to 8KB (with grep filter).
- Tab completion now respects quotes when finding the last word:
ls '/tmp/test d<Tab> treats the quoted path as one word.
- parse_ls_output uses newline delimiters instead of spaces to
preserve filenames containing spaces.
- ls command no longer uses tr to convert newlines — keeps raw output.
- Variable completion test uses export for env visibility.
- Completion buffer increased to 16KB for large directories.
Quoted path completion (tests 9, 29) still needs quote reconstruction
in the completed line output. Variable completion for unexported vars
needs shell state access in readline.
Ctrl+C always returns to prompt regardless of the next step type.
Previously only waited when next step needed input (send/send_key),
but Ctrl+C during command substitution needs prompt sync even when
next step is 'wait'. Fixes signals_jobs test 38.
signals_jobs: 39/39 (100%) — all signal and job control tests pass.
The test set PS1='' then tried to send another command, but the empty
prompt broke the test runner's prompt detection between steps.
Combining into PS1=''; echo emptyps1 avoids the sync issue.
The 2KB ls_output buffer overflowed on directories with many files
(like /tmp with 11KB of entries), causing completion to miss files
late in the sorted listing. Increased to 16KB and added grep -i prefix
filter when a pattern exists to limit output size.
Fixes filename and case-preserving completion on macOS /tmp.
Only skip wait_for_prompt for true foreground blocking commands
(non-background, non-job-control, followed by explicit 'wait' step).
All other send_line steps get prompt sync on macOS — fixes disown,
wait, jobs, and subshell background job tests (35, 37, 39).
Add 'jobs' to job control command list for marker sync detection.
