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CHANGELOG.md

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Improvements:

  • [Issue #143]: ctrl-z will now send jless to the background
  • :w[rite] <file> and :w[rite]! <file> can be used to write the current input to a file
  • Add a sexp feature to gate functionality only used for support of OCaml style S-expressions, or sexps.
  • [feature = "sexp"]: Add :writesexp <file> (also :ws) functions for writing current input as a sexp to a file. This is a temporary addition and will be removed once proper sexp support is added.

v0.9.0 (2023-07-16)

New features:

  • A new command ys will copy unescaped string literals to the clipboard. Control characters remain escaped.
  • The length of Arrays and size of Objects is now shown before the container previews, e.g., (foo: (3) ["apple", "banana", "cherry"])
  • Add a new family of "print" commands, that nearly map to the existing copy commands, that will simply print a value to the screen. This is useful for viewing the entirety of long string values all at once, or if the clipboard functionality is not working; mouse-tracking will be temporarily disabled, allowing you to use your terminal's native clipboard capabilities to select and copy the desired text.
  • Support showing line numbers, both absolute and/or relative. Absolute line numbers refer to what line number a given node would appear on if the document were pretty printed. This means there are discontinuities when in data mode because closing brackets and braces aren't displayed. Relative line numbers show how far a line is relative to the currently focused line. The behavior of the various combinations of these settings matches vim: when using just relative line numbers alone, the focused line will show 0, but when both flags are enabled the focused line will show its absolute line number.
    • Absolute line numbers are enabled by default, but not relative line numbers. These can be enabled/disabled/re-enabled via command line flags --line-numbers, --no-line-numbers, --relative-line-numbers and --no-relative-line-numbers, or via the short flags -n, -N, -r, and -R respectively.
    • These settings can also be modified while jless is running. Entering :set number/:set relativenumber will enable these settings, :set nonumber/:set norelativenumber will disable them, and :set number!/:set relativenumber! will toggle them, matching vim's behavior.
    • There is not yet support for a jless config file, so if you would like relative line numbers by default, it is recommended to set up an alias: alias jless=jless --line-numbers --relative-line-numbers.
  • You can jump to an exact line number using <count>g or <count>G. When using <count>g (lowercase 'g'), if the desired line number is hidden inside of a collapsed container, the last visible line number before the desired one will be focused. When using <count>G (uppercase 'G'), all the ancestors of the desired line will be expanded to ensure it is visible.
  • Add C and E commands, analogous to the existing c and e commands, to deeply collapse/expand a node and all its siblings.

Improvements:

  • In data mode, when a array element is focused, the highlighting on the index label (e.g., "[8]") is now inverted. Additionally, a '▶' is always displayed next to the currently focused line, even if the focused node is a primitive. Together these changes should make it more clear which line is focused, especially when the terminal's current style doesn't support dimming (ESC [ 2 m).
  • When using the c and e commands (and the new C and E commands), the focused row will stay at the same spot on the screen. (Previously jless would try to keep the same row visible at the top of the screen, which didn't make sense.)

Bug fixes:

  • Scrolling with the mouse will now move the viewing window, rather than the cursor.
  • When searching, jless will do a better job jumping to the first match after the cursor; previously if a user started a search while focused on the opening of a Object or Array, any matches inside that container were initially skipped over.
  • When jumping to a search match that is inside a collapsed container, search matches will continue to be highlighted after expanding the container.
  • [Issue #71 / PR #98]: jless will return a non-zero exit code if it fails to parse the input.

Other notes:

  • The minimum supported Rust version has been updated to 1.67.
  • jless now re-renders the screen by emitting "clear line" escape codes (ESC [ 2 K) for each line, instead of a single "clear screen" escape code (ESC [ 2 J), in the hopes of reducing flicking when scrolling.

v0.8.0 (2022-03-10)

New features:

  • Implement ctrl-u and ctrl-d commands to jump up and down by half the screen's height, or by a specified number of lines.
  • Support displaying YAML files with autodetection via file extension, or explicit --yaml or --json flags.
  • Implement ctrl-b and ctrl-f commands for scrolling up and down by the height of the screen. (Aliases for PageUp and PageDown)
  • Support copying values (with yy or yv), object keys (with yk), and paths to the currently focused node (with yp, yb or yq).

Improvements:

  • Keep focused line in same place on screen when toggling between line and data modes; fix a crash when focused on a closing delimiter and switching to data mode.
  • Pressing Escape will clear the input buffer and stop highlighting search matches.

Bug fixes:

  • Ignore clicks on the status bar or below rather than focusing on hidden lines, and don't re-render the screen, allowing the path in the status bar to be highlighted and copied.
  • [Issue #61]: Display error message for unrecognized CSI escape sequences and other IO errors instead of panicking.
  • [Issue #62]: Fix broken window resizing / SIGWINCH detection caused by clashing signal handler registered by rustyline.
  • [PR #54]: Fix panic when using Ctrl-C or Ctrl-D to cancel entering search input.

Other notes:

v0.7.2 (2022-02-20)

New features / changes:

  • [PR #42]: Space now toggles the collapsed state of the currently focused node, rather than moving down a line. (Functionality was previous available via i, but was undocumented; i has become unmapped.)

Bug fixes:

  • [Issue #7 / PR #32]: Fix issue with rustyline always reading from STDIN preventing / command from working when input provided via STDIN.

Internal:

  • [PR #17]: Upgrade from structopt to clap v3

v0.7.1 (2022-02-09)

New features:

  • F1 now opens help page
  • Search initialization commands (/, ?, *, #) all now accept count arguments

Internal code cleanup:

  • Address a lot of issues reported by clippy
  • Remove chunks of unused code, including serde dependency
  • Fix typos in help page

v0.7.0 (2022-02-06)

Introducing jless, a command-line JSON viewer.

This release represents the significant milestone: a complete set of basic functionality, without any major bugs.

This GitHub issue details much of the functionality implemented to get to this point. Spiritually, completion of many of the tasks listed there represent versions 0.1 - 0.6.

The intention is to not release a 1.0 version until Windows support is added.