CHANGELOG

v0.8.0 UNRELEASED

• While the minibuffer is in use, the menu window is now hidden by default. The new option transient-show-during-minibuffer-read not only controls whether the menu stays visible while the minibuffer is in use, but also whether it may be resized if necessary. This new option replaces transient-hide-during-minibuffer-read. #330
• When returning to a prefix whose refresh-suffixes slot is non-nil, its suffixes are now re-initialized. #327
• Added documentation for inapt-if* slots to manual. 179545a6
• transient-args and transient-scope now both take a prefix command or a list of prefix commands as argument. transient-scope can still be called without an argument, but that should only be done in functions that take part in setting up a menu, not in a suffix command.
• Added new generic function transient-prefix-value, giving finer control over how the value returned by transient-args is determined.
• Added support for implementing transient-init-scope methods for prefix classes.
• transient-setup-buffer-hook is now run later to allow overriding more default settings.
• The new prefix slots display-action and mode-line-format, can be used to override transient-display-buffer-action and transient-mode-line-format for individual prefix menus. #332

Bug fixes:

• Fixes some menu navigation edge-cases.

v0.7.9 2024-11-04

Bug fixes:

• Fixed a recent regression in transient-suffix-object. #325
• The height of the transient window was fixed even it used the full frame height. 5478d4e6

v0.7.8 2024-11-02

• Additional potential mistakes in menu definitions are now detected. bbda5bb6, 8873c300
• Added new (and still experimental) environment prefix slot, which can be used to, for example, implement a cache to be used while refreshing the menu. 05c011b8
• When navigating through the menu using the keyboard or hovering a suffix command with the mouse, information about the command is now shown in the echo area or using a tooltip. #282

Bug fixes:

• When the command that exits a transient uses the minibuffer, transient-current-* variables were not immediately reset to nil. #323
• Key sequences with three or more events broke transient-suffix-object. #324

v0.7.7 2024-10-04

Bug fix:

• Fix a regression introduced by the previous commit, which broke dynamic prefixes that use a :setup-children function to prepare their suffixes. #313

v0.7.6 2024-10-01

• transient-active-prefix now accepts a single prefix symbol, in place of a list of such symbols. #307
• other-frame-prefix and other-window-prefix can now be used while a transient prefix is active. #305
• Added new macro transient-with-help-window for use in :show-help functions. #309

v0.7.5 2024-09-01

• Updated tooling.

Bug fixes:

• static-if is now used correctly. 0e35673e
• When an existing window ends up being used to display the transient buffer, then the previous value of the no-other-window parameter is now restored, when the transient is exited. #302
• The names assigned to suffixes, which are defined using lambdas in the prefix definition, are now guaranteed to be unique. #304

v0.7.4 2024-08-05

• Added new function transient-active-prefix.

v0.7.3 2024-07-13

• Refactored code responsible for inserting columns.

Bug fix:

• The transient-current-* variables are intended to only be used by suffix commands, when they are invoked from a prefix. Previously they were only cleared when the prefix is ultimately exited, which meant that they unintentionally were accessible in timers. Now the values of these variables are nil when used outside their intended scope. 0e0ece32, f2cb28a5

v0.7.2 2024-06-24

• Added support for adding suffixes that activate value presets. #183

Bug fix:

• Restored the ability to individually set infix arguments if the prefix’s refresh-suffixes slot is non-nil. 8db5f0fd

v0.7.1 2024-06-19

• Added a workaround for emoji.el from Emacs 29.1 calling an internal function using an outdated number of arguments. #288

v0.7.0 2024-06-18

• Added new macro transient-augment-suffix, which can be used to specify the suffix behavior of a command that was previously defined as a prefix, using transient-define-prefix. 2fd3ea14
• Added new function transient-scope, which is just a convenient way to get the value of the scope slot of the transient-prefix-object. 7f6c39c5
• Added new hook transient-setup-buffer-hook, which is run early when setting the transient menu buffer. #283
• Added new class transient-information*, a variant of recently added transient-information class. 8a80e952
• By default our macros that define commands, mark those as for interactive use only. (declare (interactive-only nil)) can now be used to overwrite that. fcc60e27
• Groups now also accept :inapt* predicates. 3d395d64
• Spaces between columns is reduced from three to two. dd93001e
• Removed unused transient-plist-to-alist function. 1251faf0

Bug fixes:

• transient--force-fixed-pitch was run to late to always succeed. #283
• Key binding conflict detection was too strict, taking hypothetical bindings for inapt commands into account. c356d1bc
• Key binding conflict detection did not consider bindings in regular keymaps, such as transient-base-map. 2698d62d
• func-arity gets confused when a function is advised, so we had to add a wrapper function transient--func-arity. 91dd7bb3
• Some mistakes, that can be expected to occur when defining suffix and prefix commands, were not detected. 7e827c31

v0.6.0 2024-03-21

• On Emacs 28.1 and later, all infix commands and suffix commands that are defined inline (i.e., using a lambda when defining a prefix command), are now hidden from execute-extended-command (aka M-x) by default. It was already possible to hide these commands, but users had to opt-in explicitly. After refactoring how these commands are declared to be unsuitable for M-x, it is now possible to hide them without also hiding other, unrelated kinds of unsuitable commands.

  I recommend that you instruct M-x to hide all unsuitable command. This requires that you customizing read-extended-command-predicate, because the Emacs authors have decided that this should be an opt-in feature.

  Note that this has no effect on Emacs releases before 28.1.

• Added documentation stating that :class has to be specified when using :setup-children. beecdc85
• Added a new prefix slot column-widths, which can be used to specify the minimal width of each column in all transient-columns groups of that prefix. 92e8952e
• When assigning a name to a suffix that is defined inline, we no longer use the suffix description, iff that would result in an overly long name. 81a108ba
• Functions used as the value of face slots can now take one argument, the suffix object. Functions that take zero arguments are still supported. Additionally, transient--pending-suffix is bound around calls to these functions, but it is better to pass the object as an argument. f582a9bc
• The new definition suffix slot can be used to specify a default function definition that is used if no function body is provided using transient-define-suffix. 5b334a51
• Taught transient-suffix-object about transient--pending-suffix. 20a3770d

Bug fixes:

• If transient-parse-suffix and transient-parse-suffixes are called with an invalid value for their prefix argument, they failed to detect that. 03e752d9
• If nil is encountered inside a group specification, that was silently ignored. Now an error is signaled. 8c01a1eb
• find-function wasn’t able to locate the definitions of infix commands anymore. a30df67b
• There was no binding for ignore-preserving-kill-region in transient-predicate-map. 0fc87002
• Invoking a non-symbolic non-suffix command, caused an error. bd2a5ea0
• When a group begins with an included subgroup, that affected what group class was assumed, in the absence of an explicit specification. df36bc87
• transient--suspend-override failed to move out of the minibuffer before refreshing the transient buffer. 833143ba
• When a suffix command signaled an error during a trivial phase (which does not involve, e.g., the minibuffer), then the transient window was not deleted when the debugger was entered. 9d8f361f
• When a prefix was refreshed, the wrong color was used for suffix commands that exit the prefix, indicating that would cause a return to the outer prefix, even though there is none. f51c144a
• Calling transient-infix-read with an invalid value, resulted in a confusing error. Now an appropriate error is used. 3ebb6acf
• When third-party code or user customization managed to display another buffer in our dedicated window, then that buffer got killed when we tried to kill the transient buffer. #271

v0.5.3 2023-12-16

• Fixed regression when setting :pad-keys for a transient-columns group. #269

v0.5.2 2023-12-05

• Fixed formatting issues in the manual.

v0.5.1 2023-12-05

• Added a new introduction by JD Smith (@jdtsmith).

Bug fixes:

• Faces that use a box are now defined more defensively to protect against unexpected values and provide reasonable fallback colors. 413310cd, b8aefce3
• Only prepare to return to the parent transient if there actually is a parent. The only negative effect of failing to do this was that the suffix was colored wrong, since transient--do-return falls back to behave like transient--do-exit. 5f2cfc9f

v0.5.0 2023-11-28

• Some suffix commands exit the transient from which they were invoked, while others don’t (allowing the user to invoke another suffix without first having to enter the transient again).

  Until now it wasn’t possible to tell which category any given suffix falls into, at least not by default. Now the key binding of each suffix is colorized to indicate its transient behavior. Red means that the suffix exits the transient, and blue means that it does not. Keys for suffixes that currently cannot be invoked are gray.

  Likewise, the thin line, that is drawn between the transient popup buffer and the minibuffer, is used to indicate what happens, if you invoke a command that is not a suffix. Most prefixes do not allow non-suffixes to be invoked, so this line usually is gray. c8a9ac51

• Many faces have also been improved. This involves changing which built-in faces they inherit from, some explicit changes to their appearance, and semantic clarifications. Of course your mileage may vary — it’s possible that some face just happened to look right with your chosen theme, but now it has to be themed to achieve that again. 47d3f01d 71d16d86 et al.
• Added a new face, transient-delimiter, which is used for parentheses around values and the pipe character used to separate possible values from each other. 567b5d54
• Added a new command transient-toggle-level-limit, bound to C-x a, which temporarily shows all suffix commands a transient has to offer. This makes it possible to occasionally use more obscure commands and arguments, without having to always display them. For more information see Enabling and Disabling Suffixes. #243

The changes described below, only directly affect package authors and users who implement their own transients. If that does not describe you, then all you have to know is that many features were fine-tuned and otherwise improved, opening up some new use-cases and making some things easier to implement. This will hopefully lead to improvements in your favorite transient-using packages in the coming months.

• It sometimes makes sense to bind multiple keys to the same suffix command, e.g., because they behave differently based on the suffix description, or some other slot that can be set per binding. Previously these bindings shared a visibility level; how this can be set individually. #153
• While functions are run, which format strings to be inserted into the transient buffer or to determine whether other aspects of a suffix, that transient buffer no longer is the current buffer. Instead the buffer in which the prefix and its suffixes operate, is the current buffer. This affects functions such as transient-format-description and those found in predicate slots such as if. In contexts where the transient buffer is needed but the other buffer happens to be current, the new macro transient-with-shadowed-buffer can be used to temporarily change that.
• The new suffix slots face and inapt-face can be used to specify how a suffix looks, which in simple cases is more convenient than using a function as description and adding the face there. The values of these slots should be faces or functions that returns a face. The default for inapt-face is transient-inapt-suffix, but in some cases it is undesirable to apply this face to the whole description, so this can be overridden by setting this slot to nil for individual suffixes. The default for face is nil. c2a75880 8e15a29b 71399d21
• Added new variables transient--pending-suffix and transient--pending-group, which are bound while a suffix/group is being inserted. These are mostly intended for internal purposes, but in some rare complex cases package authors might need them too. 0717589a 70e8dc80
• Sometimes it is useful to display some information in the transient buffer, which is not associated with a suffix command. The new class transient-information can be used for that purpose. Children that use this class are very similar to regular suffixes, the lack of a command binding being nearly the only difference. #226
• Instead of a list of choices, the value of a suffix’s choices slot can now be a function that returns such a list. #212
• Per-suffix functions that format its description (specified using the description slot) can now optionally take one instead of zero argument, the respective suffix object. 09be367b
• Added a new command transient-echo-arguments intended for use in examples and bug reports, when a prefix must bind some command, but it does not really matter which. Using this command is less verbose than having to implement a dummy every time, and it comes with some goodies. I.e., it reports information about the prefix from which it was invoked. faa3d09d
• When a command was defined using transient-define-suffix and an alias for that command was created using defalias, then the alias had no access to the associated suffix object. Now it does, which makes it possible to bind the same command multiple times in a prefix, and make it behave differently depending on the symbol-name that was used to invoke it. f43aee1a
• The values of a prefix’s transient-suffix and transient-non-suffix slots should now be a boolean. The value of the transient-suffix slot has to be handled differently for different types of suffixes. I.e., infix arguments must ignore it, and sub-prefixes must honor it but to do so they must use a different pre-command. Previously booleans were not supported and the previously recommended values, transient--do-stay and transient--do-exit are still supported (but they are “corrected” for sub-prefixes). For the transient slot the use of booleans was always allowed and recommended. 8098d175
• For sub-prefixes a value of t for the transient-suffix slot of the parent prefix now means that suffixes, which exit the sub-prefix, return to the parent prefix, instead of exiting that as well. 784887b7 5ad5b627
• In addition to booleans and pre-commands, the values of the transient-suffix, transient-non-suffix and transient slots may now also be pre-command “shorthands”, e.g., use leave instead of transient--do-leave (which in some cases is a good value for `transient-non-suffix`). 9617b6c7
• transient--do-replace now behaves as documented and implied by its name. Use the new transient--do-stack if you want to return to the outer prefix. 94661e0c
• Added a new prefix slot transient-switch-frame, which allows specifying the transient behavior of switch-frame per prefix and independently of the transient behavior of other non-suffixes (specified using the transient-non-suffix slot). 609dabfd
• Added a new function transient-prefix-object to allow package authors to avoid the following unfortunate complication.

  While a transient is being setup or refreshed (which involves preparing its suffixes) the variable transient--prefix can be used to access the prefix object. Thus this is what has to be used in suffix methods such as transient-format-description, and in object-specific functions that are stored in suffix slots such as description. When a suffix command is invoked (i.e., in its interactive form and function body) then the variable transient-current-prefix has to be used instead.

  Two distinct variables are needed, because any prefix may itself be used as a suffix of another prefix, and such sub-prefixes have to be able to tell themselves apart from the prefix they were invoked from. Regular suffix commands, which are not prefixes, do not have to concern themselves with this distinction, so they can use this function instead. In the context of a plain suffix, it always returns the value of the appropriate variable. 37307c1b

Bug fixes:

• cc0fa805 transient–post-command: Redisplay after universal argument
• dd970cd4 Compile suffix commands that are defined inside prefix definitions
• b150b48b transient-quit-one: Cancel prefix-arg instead of exiting transient
• 7c08beb8 Revert “transient-{set,save,reset}: Stay transient”
• f8209cc8 transient–maybe-pad-keys: Ignore raw strings
• 0a0ba1aa transient–do-leave: Actually behave as documented
• ed5bd6fd transient-infix-set(argument): Fix disabling incompatible options
• 3a2b936a Fix highlighting infix for which user input is being read
• d834f764 transient-format(around:suffix): Don’t attempt to highlight full line
• af6eb310 transient-format: Only highlight infix if minibuffer is used
• b1d1c369 Prevent temporary faces from leaking back into objects
• 307695d2 transient-format-description(around:suffix): Combine faces
• 7f0215c4 transient-format-value(option,value): Use argument faces

Also contains various documentation updates and a lot of code clean-ups.

This release drops support for Emacs 25. The last Emacs 25 release (25.3) was released in 2017; over six years ago. The current Emacs version is 29.1; that’s four major releases since 25.1.

v0.4.3 2023-08-25

• Added a second implementation of transient--wrap-command, taking advantage of improvements in Emacs 30.

v0.4.2 2023-08-25

• Infix commands are only useful when invoked from a transient prefix command and execute-extended-command should not offer them as completion candidates. In the past we used a weird kludge to accomplish that, but now we rely on read-extended-command-predicate. That allowed the removal of some complications and made it possible to fix a bug in transient--wrap-command.

  To hide infix commands, users now have to update to Emacs 28, or later, and customize read-extended-command-predicate.

  (setq read-extended-command-predicate
        'command-completion-default-include-p)
      

• Due to changes in Emacs 29.1, pretty-printing isn’t consistent across Emacs releases anymore by default, which is unfortunate in our case because we use it to write to files that are likely to be checked into version control. We now force the use of the old style across releases.

v0.4.1 2023-06-02

Bug fixes:

• 070d47b0 Support searches that end right after suffix
• ab831828 transient–insert-group(columns): Drop separator before first column
• 62edeffd #247 Fix bug using :incompatible using suffixes before infixes
• 6efa9fad transient-predicate-map: Bind univeral-argument-more

v0.4.0 2023-05-10

• Transient has to update state after every suffix command. If that fails for some reason, then Emacs ends up in an badly broken state. It was rare, but in the worst case scenario, that meant that Emacs refused to call any more commands and had to be killed.

  Naturally post-command-hook is the first choice to run something after commands, but unfortunately that hook is not guaranteed to run only once, and worse it is not guaranteed run after the command. Working around this limitation made an essential part of Transient much more complex and fragile. As new edge-cases were discovered, new and increasingly desperate heuristics had to be added, until I finally decided that relying solely on hooks was just not feasible.

  Now pre-command-hook is used to advice this-command, to add an around advice, which ensures that the state update takes place, even when post-command-hook is run prematurely. The advice wraps both the function body and the interactive spec with unwind-protect, so we can finally be sure that the state change is always performed, and that the advice is removed again.

  It has been an interesting journey, and I have documented it in long commit messages. If you are interested in the details, see 7b8a7d71 (which still tries to avoid using any advice), 51c68c87, 52cac9c0, bug#61179 and bug#61176.

• The transient-define-prefix now expands to code instead of data, meaning that lambda expressions are finally properly evaluated and byte-compiled. ea851f3b e88f51d6 277e5f2d a1774182
• Popup navigation is no longer considered a second-class feature and is enabled by default. Some transients allow arbitrary non-suffixes to be invoked, so some key bindings, which were previously used for popup navigation, had to be removed, to avoid conflicts. 98d50202 ff
• Each prefix and suffix can now have its own help function. This is configured using the new show-help slot. ea5ac99f
• The transient-options class now supports two types of options that can have multiple values: repeated option-value pairs and a final option that takes all remaining arguments as value. #154
• Added support for the use of non-proportional text in the transient popup. 7f5520b3
• Imenu was taught about Transient’s definition macros. #178
• It is now possible to return to the parent prefix from a sub-prefix. e90f7a16
• Boolean values of the transient slot of sub-prefixes are now interpreted correctly. 4a36b1d9
• Added new option transient-hide-during-minibuffer-read. 5762bd9a
• Added new option transient-align-variable-pitch. cda6a120
• Added new command transient-reset, which clears the set and saved value of the active transient. 51585b8d
• When using Emacs 28, execute-extended-command can be told to ignore transient infix commands. Even when using that Emacs version, that command does not ignore any commands by default, but this behavior can be easily be enabled using:

  (setq read-extended-command-predicate ‘command-completion-default-include-p)

  Infix arguments are implemented as commands, so they by default show up as completion candidates of execute-extended-command, which is useless because they are only intended to be invoked from transient prefix commands. Enable this feature to prevent that.

• Added new command transient-toggle-debug. b466cd9a
• Depend on the Compat package, allowing me to use convenient features that were added to Emacs over the last few years, without having to wait another few years until everybody has updated to a reasonably recent Emacs release. 5ae3c401
• Added basic support for suffixes that span multiple lines (multi-row cells). #193
• Infix arguments can now be invoked following a prefix argument. To use a negative prefix argument use “C–”. “-” cannot be used anymore because it conflicts with the most common prefix key used for infix arguments. ed2febd0
• Removed obsolete aliases for functions deprecated in v0.3.0. #192
• Duplicated suffix commands are now disambiguated, making it possible to bind a command multiple times as a suffix of a transient command, but still have it do different things depending on what binding is used, based on the value of some slot of the corresponding suffix object, similar to how self-insert-command inserts the pressed key. f27c840a
• recursive-edit and top-level can now be used while a transient is active. fcdeadc1 5a1b2bac
• Switched to Emacs 29’s new keymap functions, which are also supported in newer releases, thanks to the Compat package. 87f70af5 5a966aa8

Bug fixes:

• 938b0591 #173 transient–show: Set point after displaying window again
• 202271f7 Resurrect transient-files class
• c26cbac5 #181 transient-{init,set}-value: Use case-sensitive matching
• 28491e1f Properly deal with stealth undefined command
• 143a1393 transient-infix-read: Always enable-recursive-minibuffers
• 76b77e01 magit–{pre,post}-command: Add emergency exits
• 09b436fa transient–debug: Ignore error in transient–suffix-symbol
• f2e0dfcc transient–get-predicate-for: Ignore error in transient–suffix-symbol
• bf29731a transient–post-command: Don’t pop and push equal redisplay maps
• 3c78b10f transient–redisplay: Don’t redisplay during mouse-drag-region
• 714e3482 No longer always suspend when handle-switch-frame is called
• ecb815bc transient–abort-commands: Add keyboard-escape-quit
• 8b1f8dcc transient–minibuffer-depth: Must always be a number
• 686b7ebc Fix handling of sub-prefix command that use the minibuffer
• a19faa1c Return to outer prefix when minibuffer is aborted for sub-prefix
• 4477555b transient–post-exit: Deal with unbound transient slot properly
• 0f39af0e #188 transient-format-description: Use cl-call-next-method
• 1fd1cf51 When highlighting suffixes not normally displayed consider group level
• 7c771c94 Do not let-bind overriding-terminal-local-map to nil
• 31d355b5 transient-set-level: Refresh shown levels after setting one
• bb056e71 Invoke suffix commands directly when a button is pushed
• 270eff1c Fix redisplay when popup navigation is enabled
• 81b2b912 Use this-original-command again
• d4fb853d #198 transient–show: Also hide the header-line
• 7467a79c transient–suspend-override: Cancel display timer
• 5686a792 transient–suspend-override: Cancel prefix key display
• 1c84d7ad Remap kp-subtract, kp-equal and kp-add
• 5302db18 Once popup is showing keep doing so until full exit
• cc887ebe transient–delay-post-command: Fix execute-extended-command handling
• 3b267425 transient–fit-window-to-buffer: Use correct package prefix
• 9d4fabc3 #208 transient–describe-function: Handle renamed help buffer
• 555792f7 #209 Fix setting level of anonymous infixes
• 0a3b22f1 #215 transient–delay-post-command: Account for events returned as vector
• ad953cc3 #204 transient–insert-group: Add fallback for failed alignment calculation
• 5337e5eb #230 transient-define-{*}: Error if ARGLIST is missing
• d800ce01 Use equal to compare with empty vector
• 3657117b #234 transient–parse-suffix: Detect when mandatory command is missing
• f88cbbc5 #234 transient–parse-suffix: Differentiate command and desc lambda
• 0204a243 #234 transient–parse-suffix: Define suffix aliases at load-time
• 0ae0de43 #241 transient–invalid: Add special-case for anonymous inapt commands
• af7fe42b #244 transient–parse-suffix: Don’t try to evaluate closures again
• 6ff5c51f transient-isearch-abort: Fix partial match case

Also contains various documentation updates, code clean-ups and build improvements.

v0.3.7 2021-10-25

• Added an additional safety hatch to prevent Emacs from entering an inconsistent state when an unexpected error occurs. 99e48369
• Added support for implementing section movement commands in third-party packages. This was requested by the maintainer of Emacspeak. Because they would be of very limited use to sighted users no such commands are added to Transient itself. 769219b5
• transient-read-number-{N0,N+,N} now support infix arguments that have three different states: disabled, enabled without an empty value, and enabled with a non-empty value. 626d105e
• If a command is called as a suffix of itself, then the help command shows the function definition instead of the man-page as it usually does for prefixes. e17e2b2f
• Give users more control over how the transient buffer is displayed. Various aspects that were previously hardcoded can now be changed using the transient-display-buffer-action option. 7c677737
• Added support for adding suffixes that might be neither defined nor autoloaded when the prefix is invoked. This usually results in an error and while it is now possible to override that using an extra step, it is still discouraged. 6842305e

Bug fixes:

• 1e740608 transient-map: Bind C-u to universal-argument
• e9048100 Explicitly call transient–pre-command in button action
• be119ee4 Export variables for transient non-infix suffixes
• b526b9c7 transient-infix-set: Consider all incompatibility rules
• 7126d6aa Fix hydra-inspired colors
• 0c2255a2 transient-get-value: Add an emergency exit

Also contains various documentation updates and code clean-ups.

v0.3.6 2021-07-01

• Added new option transient-force-single-column, which may be useful for low vision. #122
• Added new option transient-highlight-higher-levels, which is intended for package authors. 90a05622

v0.3.5 2021-06-16

• Added a kludge to work around some unexpected Emacs behavior. ef921d30
• When showing help for a suffix that is also a subprefix, then also consider the manpage that is set for the prefix, if any. a9bdd013

v0.3.4 2021-05-25

• Very minor changes.

v0.3.3 2021-05-24

• Added SPDX-License-Identifier library header. 7d3d8d79

v0.3.2 2021-04-20

• Fixed an error message. c145229a

v0.3.1 2021-04-19

• Changed transient-prefix’s suffix-description slot to be initially unbound, as was always intended. c28b8a4
• Added new functions transient-read-file and transient-read-existing-file. a3b44224

v0.3.0 2021-02-21

• Added a temporary kludge to prevent a transient from being invoked while the minibuffer is active. A future release will enable this again, once we are sure that cannot cause Emacs to enter an inconsistent state, that causes most events to be ignored. #112
• Improved the backtrace that is shown when a fatal error occurred in a critical context. This involved some back and forth. See commits mentioning the “emergency exit”.
• Added support for defining a per-prefix fallback suffix description function, which is used for suffixes that do not explicitly provide a description. The new suffix-description slot is used to specify that function. The new transient-command-summary-or-name function is useful, not just as an example. 8b22b52b
• Added transient-arg-value, which can be used to extract the values of individual arguments in the output of transient-args. d76f73f8
• Added support for using variables in group and suffix definitions of a prefix. Such indirect specifications are resolved when the transient prefix is being defined. #101
• No longer bind M-<key> to any common suffix commands; freeing this namespace for a variety of uses in individual transient. A few existing bindings had to be changed because of this. 990eb0a2
• Added transient-suffixes function, which is useful when transient-args is not sufficient because one needs the suffix objects, not just their values. #98
• Added init-value slot for infix and prefix objects. If this value bound then it is called with the object as only argument instead of the primary transient-init-value method of the object class. #96, 3284f6a0
• Added unsavable slot for infix objects. If this is non-nil, then the value of the infix is removed from the prefix value before saving, setting and adding to history. #96
• Added support for right padding the keys of all suffixes in a group. This is controlled using the new pad-keys slot of group objects. 7502390b, 293a437d
• Added support for delaying setup of the suffixes of a prefix until that is invoked. Also added support for using unnamed functions as suffix commands. Taken together these changes make it possible to dynamically create the list of suffixed. See the notmuch-transient package for two examples: notmuch-search-transient and notmuch-tag-transient. f2252d53, a3e53633
• Added the infix class transient-lisp-variable. 2d8ceff4
• Added transient-infix-read, which allows arbitrary commands to read a value the same way as would the infix command that is provided as an argument to this function. 73694be4
• Added support for coloring suffixes in a Hydra-like fashion. To enable this, customize option transient-semantic-coloring. 248862c5
• Added support for disabling and dimming suffix commands that are currently not suitable, instead of completely hiding them. #80
• Autoload functions that serve a purpose similar to that of define-key. #85
• Consistently use transient- as the prefix of all symbols. The old names remain available as obsolete aliases. dd0c44cb
• Added support for scrolling the transient popup buffer using the scroll bar. #84
• Various bug fixes. 48238bf5 Allow invoking arbitrary prefixes as non-suffixes d85eb790 transient-read-directory: Pass read value through file-local-name f086cb62 transient–insert-suffix: Allow same key with different predicates d555d260 transient-format-description(lisp-variable): Return string 0d79ccfa transient–parse-suffix: Don’t fallback to read-string for options f88dbc43 transient-suffix-object: Support all suffixes b343e2a3 transient-infix-read: Fix ivy specific kludge 55bad195 transient–pp-to-file: Bugfix c1df3b21 Ensure we use symbols in a few more places 769fa438 transient-set-level: Fix edge-case 88d935c7 transient-display-buffer-action: inhibit-same-window by default

v0.2.0 2020-02-26

• transient-args must now be called with a transient prefix command as argument. It is now the only argument and its value must be a symbol now, an object is no longer supported. When this command does not match current-transient-command, then this function now returns the set, saved or default value. 0312b93, 7d0db28, d33fe5a, a6ce195
• No longer use the last history element as initial minibuffer input by default. Added new option transient-read-with-initial-input to allow users to restore the old default. dcf7a4d, 5decc6e
• The set and saved values were not always used. #68
• Added support for inserting and removing groups. #36
• Added support for specifying where to insert elements and groups using coordinates. #26
• Added support for moving the cursor inside the transient popup buffer using the arrow keys or Isearch, and for invoke suffix commands using RET or mouse clicks. Unlike Magit-Popup, Transient doesn’t make the transient popup buffer the current buffer. This is important when invoking suffix commands that take the current position into account, but it has the drawback that we do not get these features for free. Because I also consider them unnecessary I did not implement them initially. Turns out quite a few users strongly disagree. Set transient-enable-popup-navigation to t to enable these features. #42
• Explicitly support Edebug. Previously when Edebug was triggered while a transient was active, then Emacs entered an unrecoverable state. #19
• No longer attempt to display a thin line in termcap frames. 0a96a57
• Work around some Ivy bugs/incompatibilities. af243d5, fed7ab1
• The new option transient-force-fixed-pitch allows users to use a monospaced font in transient’s popup buffer even if they use a proportional font for the rest of Emacs. #25, #67
• Adapted to backward incompatible changes in Emacs 27 that prevented faces from extending to the edge of the window as expected. c1ae1ee
• No longer depend on dash (or any other third-party package). #66
• When a transient has conflicting key bindings and Transient is configure to warn about that, then Emacs entered an unrecoverable state instead. 75de1f0
• transient-format-value now supports options with multiple values. #65
• Removing a suffix based on its position was broken. 41cbf49
• In our popup buffers disable the tab feature that Emacs 27 introduces. #62
• Inserting a new suffix next to another ended up replacing the latter instead if its key binding was defined in the suffix object. #58
• transient-undefined learned to make some noise. #57
• Fix replacing a suffix with another suffix bound to the same key. 5a360bb, 4ce1868
• Characters are no longer allowed as pseudo suffixes. To insert a an empty cell into a table use the empty string instead. 71687ba
• Added new variable transient--buffer-name. #45
• Some misconfiguration that affects how the transient popup buffer is displayed could lead to Emacs entering an unrecoverable state. #34, #44
• The echo area is now cleared when the transient popup buffer is shown. afdf1f0
• If transient-show-popup is 0 or a negative number, then not even a one-line summary is shown initially. #41
• Added new function transient-read-directory. a87cb2c
• define-transient-command now supports specifying the level of a suffix using the :level keyword argument. 6506cfd
• The mode-related suffix predicates now also support a list of modes as argument in addition to a single mode as before. 1c6afb8
• The new incompatible slot of prefix objects makes it possible to specify which arguments should be autoatically disabled when the user enables certain other arguments. 544b3bb
• transient--history-push is now defined as generic function. 47b7975
• The a new history-key slot and transient--history-key generic function for prefix objects. 3668aeb, e627d45
• Disallow setting the level of essential suffixes that are shared between all transients. #29
• The active infix is now highlight while reading its value from the user. #30
• The commands transient-set and transient-save can now be configured to exit the transient, though by default they still don’t. a47ae94
• Always respect the transient slot of a suffix, even if that suffix has a binding in transient-predicate-map. 919fc66
• Added new generic functions transient-set-value and transient-save-value intended for prefix commands. ebe9d9d
• It is no longer possible to set a prefix level to 0, which is an invalid value. #28
• All transient prefix and suffix commands are now automatically declared to be for interactive use only. a6295fa
• Infix arguments are no longer added to command-history because these entries were both useless and extremely noisy. #23
• digit-argument no longer exits the transient. 5f0ec7d
• A new keymap, transient-base-map was added to make it easier to change key bindings that are shared between all transients. This new keymap is used as the parent of all the other keymaps that are shared between all transients.
• Added new commands transient-scroll-up and transient-scroll-down, which scroll the transient window. C-v and M-v (and <next> and <prior>) are bound to these commands. These keys were chosen they are bound to scrolling commands in the global map too. This made it necessary to find a new binding for transient-show, which C-t is bound to now. #17
• The new option transient-mode-line-format allows users to use a mode-line for the transient popup buffer instead of just a thin line that separates it from the echo area. When using a non-standard value for transient-display-buffer-action it may be necessary to do that. #17
• The new option transient-display-buffer-action allows users to specify how a window is selected to display the transient popup buffer. The lv library is no longer used. #17
• The window that was selected before the transient window was shown is no longer re-selected before calling a suffix that exits the transient. If a suffix changes the selected window unintentionally, then that is a bug. This makes it possible to intentionally change the window layout using transients.
• An infix is a special kind of suffix. Depending on context “suffixes” means “suffixes (including infixes)” or “non-infix suffixes”. This is now mention in a few places where users might otherwise get confused.
• Stopped claiming that the transient is shown in the “echo area”, because technically that is not correct. Instead talk about the “popup buffer”.
• Fixed handling of suffix commands that are undefined at the time the prefix is invoked. This is still an error, but the error message now explains what is wrong. a729bbb
• Fixed saving values/history/levels, making sure that the printed expression is never abbreviated. #15
• Fixed jumping to the correct place in a manpage when showing the documentation for an infix argument. c4bf4af
• Bound ESC ESC ESC to transient-quit-all because the convention is that it should be possible to exit any temporary state using this binding. #12
• Fixed referencing suffix bindings by their key when the key binding is defined in the suffix object instead of in the suffix spec. e4ffb97
• Remove trailing whitespace from popup text for the benefit of users who have set enabled show-trailing-whitespace globally. 0758efa
• Fixed showing available bindings on a single line instead of using the usual popup buffer. 2f011c9, 99d3bf6
• Added a line between the lv window and the echo area. ca18bb6
• Fixed adding a new suffix at the end of a group and removing a group’s last suffix. #20, #6
• No longer use cl-typep, which appears to have a bug on Emacs 25. 9183fe1
• Fixed lisp make target. 170a3fd
• Fixed reading a number as the value of an infix. 8219c0b
• Various bug fixes to transient--goto-argument-description (4f80a89), transient-show-help (ccac95e), transient-infix-read (7bf9759).

v0.1.0 2019-01-14

• First release.