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# Changelog
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## To be released
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## v0.5.1 - 2019-04-14
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### Fixed
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* Fix a panic in the Sparkline widget
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## v0.5.0 - 2019-03-10
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### Added
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* Add a new curses backend (with Windows support thanks to `pancurses`).
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* Add `Backend::get_cursor` and `Backend::set_cursor` methods to query and
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set the position of the cursor.
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* Add more constructors to the `Crossterm` backend.
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* Add a demo for all backends using a shared UI and application state.
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* Add `Ratio` as a new variant of layout `Constraint`. It can be used to define
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exact ratios constraints.
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### Changed
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* Add support for multiple modifiers on the same `Style` by changing `Modifier`
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from an enum to a bitflags struct.
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So instead of writing:
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```rust
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let style = Style::default().modifier(Modifier::Italic);
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```
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one should use:
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```rust
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let style = Style::default().modifier(Modifier::ITALIC);
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// or
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let style = Style::default().modifier(Modifier::ITALIC | Modifier::BOLD);
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```
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### Fixed
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* Ensure correct behavoir of the alternate screens with the `Crossterm` backend.
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* Fix out of bounds panic when two `Buffer` are merged.
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## v0.4.0 - 2019-02-03
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### Added
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* Add a new canvas shape: `Rectangle`.
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* Official support of `Crossterm` backend.
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* Make it possible to choose the divider between `Tabs`.
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* Add word wrapping on Paragraph.
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* The gauge widget accepts a ratio (f64 between 0 and 1) in addition of a
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percentage.
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### Changed
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* Upgrade to Rust 2018 edition.
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### Fixed
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* Fix rendering of double-width characters.
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* Fix race condition on the size of the terminal and expose a size that is
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safe to use when drawing through `Frame::size`.
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* Prevent unsigned int overflow on large screens.
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## v0.3.0 - 2018-11-04
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### Added
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* Add experimental test backend
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## v0.3.0-beta.3 - 2018-09-24
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### Changed
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* `show_cursor` is called when `Terminal` is dropped if the cursor is hidden.
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## v0.3.0-beta.2 - 2018-09-23
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### Changed
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* Remove custom `termion` backends. This is motivated by the fact that
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`termion` structs are meant to be combined/wrapped to provide additional
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functionalities to the terminal (e.g AlternateScreen, Mouse support, ...).
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Thus providing exclusive types do not make a lot of sense and give a false
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hint that additional features cannot be used together. The recommended
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approach is now to create your own version of `stdout`:
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```rust
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let stdout = io::stdout().into_raw_mode()?;
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let stdout = MouseTerminal::from(stdout);
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let stdout = AlternateScreen::from(stdout);
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```
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and then to create the corresponding `termion` backend:
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```rust
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let backend = TermionBackend::new(stdout);
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```
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The resulting code is more verbose but it works with all combinations of
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additional `termion` features.
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## v0.3.0-beta.1 - 2018-09-08
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### Changed
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* Replace `Item` by a generic and flexible `Text` that can be used in both
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`Paragraph` and `List` widgets.
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* Remove unecessary borrows on `Style`.
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## v0.3.0-beta.0 - 2018-09-04
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### Added
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* Add a basic `Crossterm` backend
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### Changed
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* Remove `Group` and introduce `Layout` in its place
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- `Terminal` is no longer required to compute a layout
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- `Size` has been renamed `Constraint`
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* Widgets are rendered on a `Frame` instead of a `Terminal` in order to
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avoid mixing `draw` and `render` calls
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* `draw` on `Terminal` expects a closure where the UI is built by rendering
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widgets on the given `Frame`
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* Update `Widget` trait
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- `draw` takes area by value
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- `render` takes a `Frame` instead of a `Terminal`
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* All widgets use the consumable builder pattern
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* `SelectableList` can have no selected item and the highlight symbol is hidden
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in this case
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* Remove markup langage inside `Paragraph`. `Paragraph` now expects an iterator
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of `Text` items
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## v0.2.3 - 2018-06-09
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### Added
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* Add `start_corner` option for `List`
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* Add more text aligment options for `Paragraph`
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## v0.2.2 - 2018-05-06
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### Added
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* `Terminal` implements `Debug`
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### Changed
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* Use `FnOnce` instead of `FnMut` in Group::render
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## v0.2.1 - 2018-04-01
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### Added
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* Add `AlternateScreenBackend` in `termion` backend
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* Add `TermionBackend::with_stdout` in order to let an user of the library
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provides its own termion struct
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* Add tests and documentation for `Buffer::pos_of`
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* Remove leading whitespaces when wrapping text
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### Fixed
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* Fix `debug_assert` in `Buffer::pos_of`
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* Pass the style of `SelectableList` to the underlying `List`
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* Fix missing character when wrapping text
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* Fix panic when specifying layout constraints
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## v0.2.0 - 2017-12-26
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### Added
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* Add `MouseBackend` in `termion` backend to handle scroll and mouse events
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* Add generic `Item` for items in a `List`
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### Changed
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* Rename `TermionBackend` to `RawBackend` (to distinguish it from the `MouseBackend`)
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* Generic parameters for `List` to allow passing iterators as items
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* Generic parameters for `Table` to allow using iterators as rows and header
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* Generic parameters for `Tabs`
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* Rename `border` bitflags to `Borders`
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* Run latest `rustfmt` on all sources
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### Removed
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* Drop `log4rs` as a dev-dependencies in favor of `stderrlog`
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