This document attempts to list user-visible changes and any major internal rearrangements of Notcurses. * 1.4.2 (not yet released) * Added `notcurses_canutf8()`, to verify use of UTF-8 encoding. * 1.4.1 (2020-05-11) * No user-visible changes (fixed two unit tests). * 1.4.0 (2020-05-10) * `ncplane_content()` was added. It allows all non-null glyphs of a plane to be returned as a nul-terminated, heap-allocated string. * `ncreader` was added. This widget allows freeform input to be edited in a block, and collected into a string. * `selector_options` has been renamed to `ncselector_options`, and `multiselector_options` has been renamed to `ncmultiselector_options`. This matches the other widget option struct's nomenclature. * `ncplane_set_channels()` and `ncplane_set_attr()` have been added to allow `ncplane` attributes to be set directly and in toto. * `NULL` can now be passed as the `FILE*` argument to `notcurses_init()` and `ncdirect_init()`. In this case, a new `FILE*` will be created using `/dev/tty`. If the `FILE*` cannot be created, an error will be returned. * A `flags` field has been added to `notcurses_options`. This will allow new boolean options to be added in the future without resizing the structure. Define `NCOPTION_INHIBIT_SETLOCALE` bit. If it's not set, and the "C" or "POSIX" locale is in use, `notcurses_init()` will invoke `setlocale(LC_ALL, "")`. * All widgets now take an `ncplane*` as their first argument (some took `notcurses*` before). All widgets' `options` structs now have an `unsigned flags` bitfield. This future-proofs the widget API, to a degree. * 1.3.4 (2020-05-07) * `notcurses_lex_margins()` has been added to lex margins expressed in either of two canonical formats. Hopefully this will lead to more programs supporting margins. * `ncvisual_open_plane()` has been renamed `ncvisual_from_file()`. The former has been retained as a deprecated alias. It will be removed by 1.6/2.0. * `ncvisual_from_rgba()` and `ncvisual_from_bgra()` have been added to support creation of `ncvisual`s from memory, requiring no file. * `ncvisual_rotate()` has been added, supporting rotations of arbitrary radians on `ncvisual` objects. * `ncvisual_from_plane()` has been added to support "promotion" of an `ncplane` to an `ncvisual`. The source plane may contain only spaces, half blocks, and full blocks. This builds atop the new function `ncplane_rgba()`, which makes an RGBA flat array from an `ncplane`. * The `ncplane` argument to `ncplane_at_yx()` is now `const`. * 1.3.3 (2020-04-26) * The `ncdplot` type has been added for plots based on `double`s rather than `uint64_t`s. The `ncplot` type and all `ncplot_*` functions were renamed `ncuplot` for symmetry. * FFMpeg types are no longer leaked through the Notcurses API. `AVERROR` is no longer applicable, and `ncvisual_decode()` no longer returns a `struct AVframe*`. Instead, the `nc_err_e` enumeration has been introduced. Functions which once accepted a value-result `AVERROR` now accept a value- result `nc_err_e`. The relevant constants can be found in `notcurses/ncerrs.h`. * OpenImageIO 2.1+ is now supported as an experimental multimedia backend. FFmpeg remains recommended. Video support with OIIO is spotty thus far. * CMake no longer uses the `USE_FFMPEG` option. Instead, the `USE_MULTIMEDIA` option can be defined as `ffmpeg`, `oiio`, or `none`. In `cmake-gui`, this item will now appear as an option selector. `oiio` selects OpenImageIO. * 1.3.2 (2020-04-19) * `ncdirect_cursor_push()`, `notcurses_cursor_pop()`, and `ncdirect_cursor_yx()` have been added. These are not supported on all terminals. `ncdirect_cursor_yx()` ought be considered experimental; it must read a response from the terminal, and this can interact poorly with other uses of standard input. * 1.3.1 unintentionally inverted the C++ `Notcurses::render()` wrapper's return code. The previous semantics have been restored. * 1.3.1 (2020-04-18) * `ncplane_at_yx()` and `ncplane_at_cursor()` have been changed to return a heap-allocated EGC, and write the attributes and channels to value-result `uint32_t*` and `uint64_t*` parameters, instead of to a `cell*`. This matches `notcurses_at_yx()`, and means they're no longer invalidated if the plane in question is destroyed. The previous functionality is available as new functions `ncplane_at_yx_cell()` and `ncplane_at_cursor_cell()`. * `ncplane_set_base()` inverted its `uint32_t attrword` and `uint64_t channels` parameters, thus matching every other function with these two parameters. It moved `const char* egc` before either, to force a type error, as the change would otherwise be likely to go overlooked. * Scrolling is now completely implemented. When a plane has scrolling enabled through use of `ncplane_set_scrolling(true)`, output past the end of the last line will now result in the top line of the plane being lost, all other lines moved up one, and the bottom line cleared. * 1.3.0 (2020-04-12) * No user-visible changes * 1.2.9 (2020-04-11) * No user-visible changes * 1.2.8 (2020-04-10) * `notcurses-tetris` now happily continues if it can't load its background. * 1.2.7 (2020-04-10) * Plots now always keep the most recent data to their far right (i.e., the gap that is initially filled is on the left, rather than the right). * 1.2.6 (2020-04-08) * `ncplane_putsimple_yx()` and `ncplane_putstr_yx()` have been exported as static inline functions. * `ncplane_set_scrolling()` has been added, allowing control over whether a plane scrolls. All planes, including the standard plane, do not scroll by default. If scrolling is enabled, text output via the `*put*` family of functions continues onto the next line when encountering the end of a row. This does not apply to e.g. boxes or lines. * `ncplane_putstr_yx()` now always returns the inverse of the number of columns advanced on an error (it used to return the positive short count so long as the error was due to plane geometry, not bad input). * `ncplot_add_sample()` and `ncplot_set_sample()` have been changed to accept a `uint64_t` rather than `int64_t`, since negative samples do not currently make sense. Plots were made more accurate in general. * `notcurses_term_dim_yx()` now accepts a `const struct notcurses*`. * `notcurses_resize()` is no longer exported. It was never necessary to call this in response to a resize, despite confusing documentation that could have been read to suggest otherwise. If you're in a long block on input, and get an `NCKEY_RESIZE`, just call `notcurses_refresh()` (which now calls `notcurses_resize()` internally, as `notcurses_render()` always has). * First Fedora packaging. * 1.2.5 (2020-04-05) * Add ncplot, with support for sliding-windowed horizontal histograms. * gradient, polyfill, `ncplane_format()` and `ncplane_stain()` all now return the number of cells written on success. Failure still sees -1 returned. * `ncvisual_render()` now returns the number of cells emitted on success, as opposed to 0. Failure still sees -1 returned. * `ncvisual_render()` now interprets length parameters of -1 to mean "to the end along this axis", and no longer interprets 0 to mean this. 0 now means "a length of 0", resulting in a zero-area rendering. * `notcurses_at_yx()` no longer accepts a `cell*` as its last parameter. Instead, it accepts a `uint32_t*` and a `uint64_t*`, and writes the attribute and channels to these parameters. This was done because the `gcluster` field of the `cell*` was always set to 0, which was surprising and a source of blunders. The EGC is returned via the `char*` return value. https://github.com/dankamongmen/notcurses/issues/410 * 1.2.4 (2020-03-24) * Add ncmultiselector * Add `ncdirect_cursor_enable()` and `ncdirect_cursor_disable()`.