# Changelog

## To be released

## v0.5.1 - 2019-04-14

### Fixed

* Fix a panic in the Sparkline widget

## v0.5.0 - 2019-03-10

### Added

* Add a new curses backend (with Windows support thanks to `pancurses`).
* Add `Backend::get_cursor` and `Backend::set_cursor` methods to query and
set the position of the cursor.
* Add more constructors to the `Crossterm` backend.
* Add a demo for all backends using a shared UI and application state.
* Add `Ratio` as a new variant of layout `Constraint`. It can be used to define
exact ratios constraints.

### Changed

* Add support for multiple modifiers on the same `Style` by changing `Modifier`
from an enum to a bitflags struct.

So instead of writing:

```rust
let style = Style::default().modifier(Modifier::Italic);
```

one should use:

```rust
let style = Style::default().modifier(Modifier::ITALIC);
// or
let style = Style::default().modifier(Modifier::ITALIC | Modifier::BOLD);
```

### Fixed

* Ensure correct behavoir of the alternate screens with the `Crossterm` backend.
* Fix out of bounds panic when two `Buffer` are merged.

## v0.4.0 - 2019-02-03

### Added

* Add a new canvas shape: `Rectangle`.
* Official support of `Crossterm` backend.
* Make it possible to choose the divider between `Tabs`.
* Add word wrapping on Paragraph.
* The gauge widget accepts a ratio (f64 between 0 and 1) in addition of a
percentage.

### Changed

* Upgrade to Rust 2018 edition.

### Fixed

* Fix rendering of double-width characters.
* Fix race condition on the size of the terminal and expose a size that is
safe to use when drawing through `Frame::size`.
* Prevent unsigned int overflow on large screens.

## v0.3.0 - 2018-11-04

### Added

* Add experimental test backend

## v0.3.0-beta.3 - 2018-09-24

### Changed

* `show_cursor` is called when `Terminal` is dropped if the cursor is hidden.

## v0.3.0-beta.2 - 2018-09-23

### Changed

* Remove custom `termion` backends. This is motivated by the fact that
`termion` structs are meant to be combined/wrapped to provide additional
functionalities to the terminal (e.g AlternateScreen, Mouse support, ...).
Thus providing exclusive types do not make a lot of sense and give a false
hint that additional features cannot be used together. The recommended
approach is now to create your own version of `stdout`:

```rust
let stdout = io::stdout().into_raw_mode()?;
let stdout = MouseTerminal::from(stdout);
let stdout = AlternateScreen::from(stdout);
```

and then to create the corresponding `termion` backend:

```rust
let backend = TermionBackend::new(stdout);
```

The resulting code is more verbose but it works with all combinations of
additional `termion` features.

## v0.3.0-beta.1 - 2018-09-08

### Changed

* Replace `Item` by a generic and flexible `Text` that can be used in both
`Paragraph` and `List` widgets.
* Remove unecessary borrows on `Style`.

## v0.3.0-beta.0 - 2018-09-04

### Added

* Add a basic `Crossterm` backend

### Changed

* Remove `Group` and introduce `Layout` in its place
  - `Terminal` is no longer required to compute a layout
  - `Size` has been renamed `Constraint`
* Widgets are rendered on a `Frame` instead of a `Terminal` in order to
avoid mixing `draw` and `render` calls
* `draw` on `Terminal` expects a closure where the UI is built by rendering
widgets on the given `Frame`
* Update `Widget` trait
  - `draw` takes area by value
  - `render` takes a `Frame` instead of a `Terminal`
* All widgets use the consumable builder pattern
* `SelectableList` can have no selected item and the highlight symbol is hidden
in this case
* Remove markup langage inside `Paragraph`. `Paragraph` now expects an iterator
of `Text` items

## v0.2.3 - 2018-06-09

### Added

* Add `start_corner` option for `List`
* Add more text aligment options for `Paragraph`

## v0.2.2 - 2018-05-06

### Added

* `Terminal` implements `Debug`

### Changed

* Use `FnOnce` instead of `FnMut` in Group::render

## v0.2.1 - 2018-04-01

### Added

* Add `AlternateScreenBackend` in `termion` backend
* Add `TermionBackend::with_stdout` in order to let an user of the library
provides its own termion struct
* Add tests and documentation for `Buffer::pos_of`
* Remove leading whitespaces when wrapping text

### Fixed

* Fix `debug_assert` in `Buffer::pos_of`
* Pass the style of `SelectableList` to the underlying `List`
* Fix missing character when wrapping text
* Fix panic when specifying layout constraints

## v0.2.0 - 2017-12-26

### Added

* Add `MouseBackend` in `termion` backend to handle scroll and mouse events
* Add generic `Item` for items in a `List`

### Changed

* Rename `TermionBackend` to `RawBackend` (to distinguish it from the `MouseBackend`)
* Generic parameters for `List` to allow passing iterators as items
* Generic parameters for `Table` to allow using iterators as rows and header
* Generic parameters for `Tabs`
* Rename `border` bitflags to `Borders`

* Run latest `rustfmt` on all sources

### Removed

* Drop `log4rs` as a dev-dependencies in favor of `stderrlog`
