Make all configuration fields optional

All configuration fields now have fallback values which will be used if
the field is not present. This includes mouse, key bindings and platform
specific differences.

The mouse and key bindings are now filled by default, if the user
rebinds a default mapping, it will be overwritten. To unbind a default
binding, it can be mapped to `chars: ""`.

Since all platform differences can now be correctly handled by the
`src/config/mod.rs` code, it's no longer necessary to maintain separate
configuration files, so the `alacritty_macos.yml` and
`alacritty_windows.yml` have been deleted.

Fixes #40.
Fixes #1923.

13 files changed, 849 insertions, 1390 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 366aff0d..ecba7bd6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- All options in the configuration file are now optional
+
+### Removed
+
+- Windows and macOS configuration files (`alacritty.yml` is now platform independent)
+
 ### Fixed
 
 - Replaced `Command` with `Super` in the Linux and Windows config documentation
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index c24df1b8..a38c5a02 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -83,7 +83,7 @@ Alacritty mainly uses the [vtebench](https://github.com/jwilm/vtebench) tool for
 
 Code should be documented where appropriate. The existing code can be used as a guidance here and the general `rustfmt` rules can be followed for formatting.
 
-If any change has been made to the `config.rs` file, these changes should be documented in the example configuration files `alacritty.yml`, `alacritty_macos.yml` and `alacritty_windows.yml`. Only changes which are exclusive to a specific platform do not need to be added to all configuration files.
+If any change has been made to the `config.rs` file, these changes should also be documented in the example configuration file `alacritty.yml`.
 
 Changes compared to the latest Alacritty release which have a direct effect on the user (opposed to things like code refactorings or documentation/tests) additionally need to be documented in the `CHANGELOG.md`. The existing entries should be used as a style guideline. The change log should be used to document changes from a user-perspective, instead of explaining the technical background (like commit messages). More information about Alacritty's change log format can be found [here](https://keepachangelog.com).
 
diff --git a/README.md b/README.md
index 04a3f04a..6a4d6fb5 100644
--- a/README.md
+++ b/README.md
@@ -110,8 +110,8 @@ Prebuilt binaries for Linux, macOS, and Windows can be downloaded from the [GitH
 
 Although it's possible the default configuration would work on your system,
 you'll probably end up wanting to customize it anyhow. There is a default
-`alacritty.yml`, `alacritty_macos.yml`, and `alacritty_windows.yml` at the Git repository root.
-Alacritty looks for the configuration file as the following paths:
+`alacritty.yml` at the Git repository root. Alacritty looks for the
+configuration file at the following paths:
 
 1. `$XDG_CONFIG_HOME/alacritty/alacritty.yml`
 2. `$XDG_CONFIG_HOME/alacritty.yml`
diff --git a/alacritty.yml b/alacritty.yml
index 8e3dd220..50d36b42 100644
--- a/alacritty.yml
+++ b/alacritty.yml
@@ -8,8 +8,8 @@
   #
   # This value is used to set the `$TERM` environment variable for
   # each instance of Alacritty. If it is not present, alacritty will
-  # check the local terminfo database and use 'alacritty' if it is
-  # available, otherwise 'xterm-256color' is used.
+  # check the local terminfo database and use `alacritty` if it is
+  # available, otherwise `xterm-256color` is used.
   #TERM: xterm-256color
 
 window:
@@ -18,8 +18,8 @@ window:
   # Specified in number of columns/lines, not pixels.
   # If both are `0`, this setting is ignored.
   dimensions:
-    columns: 80
-    lines: 24
+    columns: 0
+    lines: 0
 
   # Window padding (changes require restart)
   #
@@ -37,6 +37,10 @@ window:
   # Values for `decorations`:
   #     - full: Borders and title bar
   #     - none: Neither borders nor title bar
+  #
+  # Values for `decorations` (macOS only):
+  #     - buttonless: Title bar, transparent background and title bar buttons
+  #     - transparent: Title bar, transparent background, but no title bar buttons
   decorations: full
 
   # When true, alacritty starts maximized.
@@ -73,40 +77,41 @@ scrolling:
 tabspaces: 8
 
 # Font configuration (changes require restart)
-#
-# Important font attributes like antialiasing, subpixel aa, and hinting can be
-# controlled through fontconfig. Specifically, the following attributes should
-# have an effect:
-#   - hintstyle
-#   - antialias
-#   - lcdfilter
-#   - rgba
-#
-# For instance, if you wish to disable subpixel antialiasing, you might set the
-# rgba property to `none`. If you wish to completely disable antialiasing, you
-# can set antialias to `false`.
-#
-# Please see these resources for more information on how to use fontconfig:
-#   - https://wiki.archlinux.org/index.php/font_configuration#Fontconfig_configuration
-#   - file:///usr/share/doc/fontconfig/fontconfig-user.html
 font:
   # Normal (roman) font face
   normal:
-    family: monospace
+    # Font family
+    #
+    # Default:
+    #   - (macOS) Menlo
+    #   - (Linux) monospace
+    #   - (Windows) Consolas
+    #family: monospace
+
     # The `style` can be specified to pick a specific face.
-    #style: Regular
+    style: Regular
 
   # Bold font face
   bold:
-    family: monospace
+    # Font family
+    #
+    # If the bold family is not specified, it will fall back to the
+    # value specified for the normal font.
+    #family: monospace
+
     # The `style` can be specified to pick a specific face.
-    #style: Bold
+    style: Bold
 
   # Italic font face
   italic:
-    family: monospace
+    # Font family
+    #
+    # If the italic family is not specified, it will fall back to the
+    # value specified for the normal font.
+    #family: monospace
+
     # The `style` can be specified to pick a specific face.
-    #style: Italic
+    style: Italic
 
   # Point size
   size: 11.0
@@ -124,6 +129,22 @@ font:
     x: 0
     y: 0
 
+  # Thin stroke font rendering (macOS only)
+  #
+  # Thin strokes are suitable for retina displays, but for non-retina screens
+  # it is recommended to set `use_thin_strokes` to `false`
+  #
+  # macOS >= 10.14.x:
+  #
+  # If the font quality on non-retina display looks bad then set
+  # `use_thin_strokes` to `true` and enable font smoothing by running the
+  # following command:
+  #   `defaults write -g CGFontRenderingFontSmoothingDisabled -bool NO`
+  #
+  # This is a global setting and will require a log out or restart to take
+  # effect.
+  use_thin_strokes: true
+
 # Display the time it takes to redraw each frame.
 render_timer: false
 
@@ -165,7 +186,7 @@ colors:
     blue:    '0x7aa6da'
     magenta: '0xc397d8'
     cyan:    '0x70c0ba'
-    white:   '0xffffff'
+    white:   '0xeaeaea'
 
   # Bright colors
   bright:
@@ -182,22 +203,25 @@ colors:
   #
   # If the dim colors are not set, they will be calculated automatically based
   # on the `normal` colors.
-  dim:
-    black:   '0x333333'
-    red:     '0xf2777a'
-    green:   '0x99cc99'
-    yellow:  '0xffcc66'
-    blue:    '0x6699cc'
-    magenta: '0xcc99cc'
-    cyan:    '0x66cccc'
-    white:   '0xdddddd'
+  #dim:
+  #  black:   '0x000000'
+  #  red:     '0x8c3336'
+  #  green:   '0x7a8530'
+  #  yellow:  '0x97822e'
+  #  blue:    '0x506d8f'
+  #  magenta: '0x80638e'
+  #  cyan:    '0x497e7a'
+  #  white:   '0x9a9a9a'
 
   # Indexed Colors
   #
   # The indexed colors include all colors from 16 to 256.
   # When these are not set, they're filled with sensible defaults.
-  #indexed_colors:
-  #  - { index: 16, color: '0x000000' }
+  #
+  # Example:
+  #   `- { index: 16, color: '0xff00ff' }`
+  #
+  indexed_colors: []
 
 # Visual Bell
 #
@@ -266,28 +290,32 @@ mouse:
     #
     # This program is executed when clicking on a text which is recognized as a URL.
     # The URL is always added to the command as the last parameter.
-    launcher: xdg-open
+    #
+    # Default:
+    #   - (macOS) open
+    #   - (Linux) xdg-open
+    #   - (Windows) explorer
+    #launcher: xdg-open
 
     # URL modifiers
     #
     # These are the modifiers that need to be held down for opening URLs when clicking
     # on them. The available modifiers are documented in the key binding section.
-    #modifiers: Control|Shift
+    modifiers: None
 
 selection:
   semantic_escape_chars: ",│`|:\"' ()[]{}<>"
 
-  # When set to `true`, selected text will be copied to both the primary and
-  # the selection clipboard. Otherwise, it will only be copied to the selection
-  # clipboard.
+  # When set to `true`, selected text will be copied to the primary clipboard.
   save_to_clipboard: false
 
+# Allow terminal applications to change Alacritty's window title.
 dynamic_title: true
 
 cursor:
   # Cursor style
   #
-  # Values for 'style':
+  # Values for `style`:
   #   - ▇ Block
   #   - _ Underline
   #   - | Beam
@@ -304,20 +332,39 @@ live_config_reload: true
 #
 # You can set `shell.program` to the path of your favorite shell, e.g. `/bin/fish`.
 # Entries in `shell.args` are passed unmodified as arguments to the shell.
+#
+# Default:
+#   - (Linux/macOS) /bin/bash --login
+#   - (Windows) powershell
 #shell:
 #  program: /bin/bash
 #  args:
 #    - --login
 
+# Windows 10 ConPTY backend (Windows only)
+#
+# This will enable better color support and may resolve other issues,
+# however this API and its implementation is still young and so is
+# disabled by default, as stability may not be as good as the winpty
+# backend.
+#
+# Alacritty will fall back to the WinPTY automatically if the ConPTY
+# backend cannot be initialized.
+enable_experimental_conpty_backend: false
+
 # Key bindings
 #
-# Key bindings are specified as a list of objects. Each binding will specify
-# a key and modifiers required to trigger it, terminal modes where the binding
-# is applicable, and what should be done when the key binding fires. It can
-# either send a byte sequence to the running application (`chars`), execute
-# a predefined action (`action`) or fork and execute a specified command plus
+# Key bindings are specified as a list of objects. Each binding will specify a
+# key and modifiers required to trigger it, terminal modes where the binding is
+# applicable, and what should be done when the key binding fires. It can either
+# send a byte sequence to the running application (`chars`), execute a
+# predefined action (`action`) or fork and execute a specified command plus
 # arguments (`command`).
 #
+# Bindings are always filled by default, but will be replaced when a new binding
+# with the same triggers is defined. To unset a default binding, it can be
+# mapped to the `None` action.
+#
 # Example:
 #   `- { key: V, mods: Control|Shift, action: Paste }`
 #
@@ -342,8 +389,9 @@ live_config_reload: true
 #     `showkey --scancodes`
 #
 # Values for `mods`:
-#   - Super
+#   - Command
 #   - Control
+#   - Super
 #   - Shift
 #   - Alt
 #
@@ -375,6 +423,7 @@ live_config_reload: true
 #   - Quit
 #   - ClearLogNotice
 #   - SpawnNewInstance
+#   - None
 #
 # Values for `command`:
 #   The `command` field must be a map containing a `program` string and
@@ -389,14 +438,28 @@ live_config_reload: true
 #   - ~AppKeypad
 #   - AppKeypad
 key_bindings:
-  - { key: V,        mods: Control|Shift,    action: Paste               }
-  - { key: C,        mods: Control|Shift,    action: Copy                }
+  # (Windows/Linux only)
+  #- { key: V,        mods: Control|Shift,    action: Paste               }
+  #- { key: C,        mods: Control|Shift,    action: Copy                }
+  #- { key: Insert,   mods: Shift,   action: PasteSelection               }
+  #- { key: Key0,     mods: Control, action: ResetFontSize                }
+  #- { key: Equals,   mods: Control, action: IncreaseFontSize             }
+  #- { key: Subtract, mods: Control, action: DecreaseFontSize             }
+
+  # (macOS only)
+  #- { key: Key0,     mods: Command, action: ResetFontSize                }
+  #- { key: Equals,   mods: Command, action: IncreaseFontSize             }
+  #- { key: Minus,    mods: Command, action: DecreaseFontSize             }
+  #- { key: K,        mods: Command, action: ClearHistory                 }
+  #- { key: K,        mods: Command, chars: "\x0c"                        }
+  #- { key: V,        mods: Command, action: Paste                        }
+  #- { key: C,        mods: Command, action: Copy                         }
+  #- { key: H,        mods: Command, action: Hide                         }
+  #- { key: Q,        mods: Command, action: Quit                         }
+  #- { key: W,        mods: Command, action: Quit                         }
+
   - { key: Paste,                   action: Paste                        }
   - { key: Copy,                    action: Copy                         }
-  - { key: Insert,   mods: Shift,   action: PasteSelection               }
-  - { key: Key0,     mods: Control, action: ResetFontSize                }
-  - { key: Equals,   mods: Control, action: IncreaseFontSize             }
-  - { key: Subtract, mods: Control, action: DecreaseFontSize             }
   - { key: L,        mods: Control, action: ClearLogNotice               }
   - { key: L,        mods: Control, chars: "\x0c"                        }
   - { key: Home,                    chars: "\x1bOH",   mode: AppCursor   }
@@ -494,3 +557,4 @@ key_bindings:
   - { key: F10,      mods: Super,   chars: "\x1b[21;3~"                  }
   - { key: F11,      mods: Super,   chars: "\x1b[23;3~"                  }
   - { key: F12,      mods: Super,   chars: "\x1b[24;3~"                  }
+  - { key: NumpadEnter,             chars: "\n"                          }
diff --git a/alacritty_macos.yml b/alacritty_macos.yml
deleted file mode 100644
index 57ea3444..00000000
--- a/alacritty_macos.yml
+++ /dev/null
@@ -1,508 +0,0 @@
-# Configuration for Alacritty, the GPU enhanced terminal emulator.
-
-# Any items in the `env` entry below will be added as
-# environment variables. Some entries may override variables
-# set by alacritty itself.
-#env:
-  # TERM variable
-  #
-  # This value is used to set the `$TERM` environment variable for
-  # each instance of Alacritty. If it is not present, alacritty will
-  # check the local terminfo database and use 'alacritty' if it is
-  # available, otherwise 'xterm-256color' is used.
-  #TERM: xterm-256color
-
-window:
-  # Window dimensions (changes require restart)
-  #
-  # Specified in number of columns/lines, not pixels.
-  # If both are `0`, this setting is ignored.
-  dimensions:
-    columns: 80
-    lines: 24
-
-  # Window padding (changes require restart)
-  #
-  # Blank space added around the window in pixels. This padding is scaled
-  # by DPI and the specified value is always added at both opposing sides.
-  padding:
-    x: 2
-    y: 2
-
-  # Spread additional padding evenly around the terminal content.
-  dynamic_padding: false
-
-  # Window decorations
-  #
-  # Available values:
-  # - `full`: Window with title bar and title bar buttons
-  # - `none`: Window without title bar, rounded corners, or drop shadow
-  # - `transparent`: Window with title bar with transparent background and title
-  #   bar buttons
-  # - `buttonless`: Window with title bar with transparent background and no
-  #   title bar buttons
-  # Window decorations
-  #
-  # Values for `decorations`:
-  #     - full: Borders and title bar
-  #     - none: Neither borders nor title bar
-  #     - buttonless: Title bar, transparent background and title bar buttons
-  #     - transparent: Title bar, transparent background, but no title bar buttons
-  decorations: full
-
-  # When true, alacritty starts maximized.
-  start_maximized: false
-
-scrolling:
-  # Maximum number of lines in the scrollback buffer.
-  # Specifying '0' will disable scrolling.
-  history: 10000
-
-  # Number of lines the viewport will move for every line scrolled when
-  # scrollback is enabled (history > 0).
-  multiplier: 3
-
-  # Faux Scrolling
-  #
-  # The `faux_multiplier` setting controls the number of lines the terminal
-  # should scroll when the alternate screen buffer is active. This is used
-  # to allow mouse scrolling for applications like `man`.
-  #
-  # Specifying `0` will disable faux scrolling.
-  faux_multiplier: 3
-
-  # Scroll to the bottom when new text is written to the terminal.
-  auto_scroll: false
-
-# Spaces per Tab (changes require restart)
-#
-# This setting defines the width of a tab in cells.
-#
-# Some applications, like Emacs, rely on knowing about the width of a tab.
-# To prevent unexpected behavior in these applications, it's also required to
-# change the `it` value in terminfo when altering this setting.
-tabspaces: 8
-
-# Font configuration (changes require restart)
-font:
-  # Normal (roman) font face
-  normal:
-    family: Menlo
-    # The `style` can be specified to pick a specific face.
-    #style: Regular
-
-  # Bold font face
-  bold:
-    family: Menlo
-    # The `style` can be specified to pick a specific face.
-    #style: Bold
-
-  # Italic font face
-  italic:
-    family: Menlo
-    # The `style` can be specified to pick a specific face.
-    #style: Italic
-
-  # Point size
-  size: 12.0
-
-  # Offset is the extra space around each character. `offset.y` can be thought of
-  # as modifying the line spacing, and `offset.x` as modifying the letter spacing.
-  offset:
-    x: 0
-    y: 0
-
-  # Glyph offset determines the locations of the glyphs within their cells with
-  # the default being at the bottom. Increasing `x` moves the glyph to the right,
-  # increasing `y` moves the glyph upwards.
-  glyph_offset:
-    x: 0
-    y: 0
-
-  # Thin stroke font rendering (OS X only)
-  #
-  # Thin strokes are suitable for retina displays, but for non-retina screens
-  # it is recommended to set `use_thin_strokes` to `false`
-  #
-  # macOS >= 10.14.x:
-  #
-  # If the font quality on non-retina display looks bad then set
-  # `use_thin_strokes` to `true` and enable font smoothing by running the
-  # following command:
-  #   `defaults write -g CGFontRenderingFontSmoothingDisabled -bool NO`
-  #
-  # This is a global setting and will require a log out or restart to take
-  # effect.
-  use_thin_strokes: true
-
-# Display the time it takes to redraw each frame.
-render_timer: false
-
-# Keep the log file after quitting Alacritty.
-persistent_logging: false
-
-# If `true`, bold text is drawn using the bright color variants.
-draw_bold_text_with_bright_colors: true
-
-# Colors (Tomorrow Night Bright)
-colors:
-  # Default colors
-  primary:
-    background: '0x000000'
-    foreground: '0xeaeaea'
-
-    # Bright and dim foreground colors
-    #
-    # The dimmed foreground color is calculated automatically if it is not present.
-    # If the bright foreground color is not set, or `draw_bold_text_with_bright_colors`
-    # is `false`, the normal foreground color will be used.
-    #dim_foreground: '0x9a9a9a'
-    #bright_foreground: '0xffffff'
-
-  # Cursor colors
-  #
-  # Colors which should be used to draw the terminal cursor. If these are unset,
-  # the cursor color will be the inverse of the cell color.
-  #cursor:
-  #  text: '0x000000'
-  #  cursor: '0xffffff'
-
-  # Normal colors
-  normal:
-    black:   '0x000000'
-    red:     '0xd54e53'
-    green:   '0xb9ca4a'
-    yellow:  '0xe6c547'
-    blue:    '0x7aa6da'
-    magenta: '0xc397d8'
-    cyan:    '0x70c0ba'
-    white:   '0xffffff'
-
-  # Bright colors
-  bright:
-    black:   '0x666666'
-    red:     '0xff3334'
-    green:   '0x9ec400'
-    yellow:  '0xe7c547'
-    blue:    '0x7aa6da'
-    magenta: '0xb77ee0'
-    cyan:    '0x54ced6'
-    white:   '0xffffff'
-
-  # Dim colors
-  #
-  # If the dim colors are not set, they will be calculated automatically based
-  # on the `normal` colors.
-  dim:
-    black:   '0x333333'
-    red:     '0xf2777a'
-    green:   '0x99cc99'
-    yellow:  '0xffcc66'
-    blue:    '0x6699cc'
-    magenta: '0xcc99cc'
-    cyan:    '0x66cccc'
-    white:   '0xdddddd'
-
-  # Indexed Colors
-  #
-  # The indexed colors include all colors from 16 to 256.
-  # When these are not set, they're filled with sensible defaults.
-  #indexed_colors:
-  #  - { index: 16, color: '0x000000' }
-
-# Visual Bell
-#
-# Any time the BEL code is received, Alacritty "rings" the visual bell. Once
-# rung, the terminal background will be set to white and transition back to the
-# default background color. You can control the rate of this transition by
-# setting the `duration` property (represented in milliseconds). You can also
-# configure the transition function by setting the `animation` property.
-#
-# Values for `animation`:
-#   - Ease
-#   - EaseOut
-#   - EaseOutSine
-#   - EaseOutQuad
-#   - EaseOutCubic
-#   - EaseOutQuart
-#   - EaseOutQuint
-#   - EaseOutExpo
-#   - EaseOutCirc
-#   - Linear
-#
-# Specifying a `duration` of `0` will disable the visual bell.
-visual_bell:
-  animation: EaseOutExpo
-  duration: 0
-  color: '0xffffff'
-
-# Background opacity
-#
-# Window opacity as a floating point number from `0.0` to `1.0`.
-# The value `0.0` is completely transparent and `1.0` is opaque.
-background_opacity: 1.0
-
-# Mouse bindings
-#
-# Available fields:
-#   - mouse
-#   - action
-#   - mods (optional)
-#
-# Values for `mouse`:
-#   - Middle
-#   - Left
-#   - Right
-#   - Numeric identifier such as `5`
-#
-# All available `mods` and `action` values are documented in the key binding
-# section.
-mouse_bindings:
-  - { mouse: Middle, action: PasteSelection }
-
-mouse:
-  # Click settings
-  #
-  # The `double_click` and `triple_click` settings control the time
-  # alacritty should wait for accepting multiple clicks as one double
-  # or triple click.
-  double_click: { threshold: 300 }
-  triple_click: { threshold: 300 }
-
-  # If this is `true`, the cursor is temporarily hidden when typing.
-  hide_when_typing: false
-
-  url:
-    # URL launcher
-    #
-    # This program is executed when clicking on a text which is recognized as a URL.
-    # The URL is always added to the command as the last parameter.
-    launcher: open
-
-    # URL modifiers
-    #
-    # These are the modifiers that need to be held down for opening URLs when clicking
-    # on them. The available modifiers are documented in the key binding section.
-    #modifiers: Control|Shift
-
-selection:
-  semantic_escape_chars: ",│`|:\"' ()[]{}<>"
-
-  # When set to `true`, selected text will be copied to the primary clipboard.
-  save_to_clipboard: false
-
-cursor:
-  # Cursor style
-  #
-  # Values for 'style':
-  #   - ▇ Block
-  #   - _ Underline
-  #   - | Beam
-  style: Block
-
-  # If this is `true`, the cursor will be rendered as a hollow box when the
-  # window is not focused.
-  unfocused_hollow: true
-
-# Live config reload (changes require restart)
-live_config_reload: true
-
-# Shell
-#
-# You can set `shell.program` to the path of your favorite shell, e.g. `/bin/fish`.
-# Entries in `shell.args` are passed unmodified as arguments to the shell.
-#shell:
-#  program: /bin/bash
-#  args:
-#    - --login
-
-# Key bindings
-#
-# Key bindings are specified as a list of objects. Each binding will specify
-# a key and modifiers required to trigger it, terminal modes where the binding
-# is applicable, and what should be done when the key binding fires. It can
-# either send a byte sequence to the running application (`chars`), execute
-# a predefined action (`action`) or fork and execute a specified command plus
-# arguments (`command`).
-#
-# Example:
-#   `- { key: V, mods: Control|Shift, action: Paste }`
-#
-# Available fields:
-#   - key
-#   - mods (optional)
-#   - chars | action | command (exactly one required)
-#   - mode (optional)
-#
-# Values for `key`:
-#   - `A` -> `Z`
-#   - `F1` -> `F12`
-#   - `Key1` -> `Key0`
-#
-#   A full list with available key codes can be found here:
-#   https://docs.rs/glutin/*/glutin/enum.VirtualKeyCode.html#variants
-#
-#   Instead of using the name of the keys, the `key` field also supports using
-#   the scancode of the desired key. Scancodes have to be specified as a
-#   decimal number.
-#   This command will allow you to display the hex scancodes for certain keys:
-#     `showkey --scancodes`
-#
-# Values for `mods`:
-#   - Command
-#   - Control
-#   - Shift
-#   - Alt
-#
-#   Multiple `mods` can be combined using `|` like this: `mods: Control|Shift`.
-#   Whitespace and capitalization is relevant and must match the example.
-#
-# Values for `chars`:
-#   The `chars` field writes the specified string to the terminal. This makes
-#   it possible to pass escape sequences.
-#   To find escape codes for bindings like `PageUp` ("\x1b[5~"), you can run
-#   the command `showkey -a` outside of tmux.
-#   Note that applications use terminfo to map escape sequences back to
-#   keys. It is therefore required to update the terminfo when
-#   changing an escape sequence.
-#
-# Values for `action`:
-#   - Paste
-#   - PasteSelection
-#   - Copy
-#   - IncreaseFontSize
-#   - DecreaseFontSize
-#   - ResetFontSize
-#   - ScrollPageUp
-#   - ScrollPageDown
-#   - ScrollToTop
-#   - ScrollToBottom
-#   - ClearHistory
-#   - Hide
-#   - Quit
-#   - ClearLogNotice
-#   - SpawnNewInstance
-#
-# Values for `command`:
-#   The `command` field must be a map containing a `program` string and
-#   an `args` array of command line parameter strings.
-#
-#   Example:
-#       `command: { program: "alacritty", args: ["-e", "vttest"] }`
-#
-# Values for `mode`:
-#   - ~AppCursor
-#   - AppCursor
-#   - ~AppKeypad
-#   - AppKeypad
-key_bindings:
-  - { key: V,        mods: Command, action: Paste                        }
-  - { key: C,        mods: Command, action: Copy                         }
-  - { key: Paste,                   action: Paste                        }
-  - { key: Copy,                    action: Copy                         }
-  - { key: H,        mods: Command, action: Hide                         }
-  - { key: Q,        mods: Command, action: Quit                         }
-  - { key: W,        mods: Command, action: Quit                         }
-  - { key: Home,                    chars: "\x1bOH",   mode: AppCursor   }
-  - { key: Home,                    chars: "\x1b[H",   mode: ~AppCursor  }
-  - { key: End,                     chars: "\x1bOF",   mode: AppCursor   }
-  - { key: End,                     chars: "\x1b[F",   mode: ~AppCursor  }
-  - { key: Key0,     mods: Command, action: ResetFontSize                }
-  - { key: Equals,   mods: Command, action: IncreaseFontSize             }
-  - { key: Minus,    mods: Command, action: DecreaseFontSize             }
-  - { key: K,        mods: Command, action: ClearHistory                 }
-  - { key: K,        mods: Command, chars: "\x0c"                        }
-  - { key: L,        mods: Control, action: ClearLogNotice               }
-  - { key: L,        mods: Control, chars: "\x0c"                        }
-  - { key: PageUp,   mods: Shift,   chars: "\x1b[5;2~"                   }
-  - { key: PageUp,   mods: Control, chars: "\x1b[5;5~"                   }
-  - { key: PageUp,                  chars: "\x1b[5~"                     }
-  - { key: PageDown, mods: Shift,   chars: "\x1b[6;2~"                   }
-  - { key: PageDown, mods: Control, chars: "\x1b[6;5~"                   }
-  - { key: PageDown,                chars: "\x1b[6~"                     }
-  - { key: Tab,      mods: Shift,   chars: "\x1b[Z"                      }
-  - { key: Back,                    chars: "\x7f"                        }
-  - { key: Back,     mods: Alt,     chars: "\x1b\x7f"                    }
-  - { key: Insert,                  chars: "\x1b[2~"                     }
-  - { key: Delete,                  chars: "\x1b[3~"                     }
-  - { key: Left,     mods: Shift,   chars: "\x1b[1;2D"                   }
-  - { key: Left,     mods: Control, chars: "\x1b[1;5D"                   }
-  - { key: Left,     mods: Alt,     chars: "\x1b[1;3D"                   }
-  - { key: Left,                    chars: "\x1b[D",   mode: ~AppCursor  }
-  - { key: Left,                    chars: "\x1bOD",   mode: AppCursor   }
-  - { key: Right,    mods: Shift,   chars: "\x1b[1;2C"                   }
-  - { key: Right,    mods: Control, chars: "\x1b[1;5C"                   }
-  - { key: Right,    mods: Alt,     chars: "\x1b[1;3C"                   }
-  - { key: Right,                   chars: "\x1b[C",   mode: ~AppCursor  }
-  - { key: Right,                   chars: "\x1bOC",   mode: AppCursor   }
-  - { key: Up,       mods: Shift,   chars: "\x1b[1;2A"                   }
-  - { key: Up,       mods: Control, chars: "\x1b[1;5A"                   }
-  - { key: Up,       mods: Alt,     chars: "\x1b[1;3A"                   }
-  - { key: Up,                      chars: "\x1b[A",   mode: ~AppCursor  }
-  - { key: Up,                      chars: "\x1bOA",   mode: AppCursor   }
-  - { key: Down,     mods: Shift,   chars: "\x1b[1;2B"                   }
-  - { key: Down,     mods: Control, chars: "\x1b[1;5B"                   }
-  - { key: Down,     mods: Alt,     chars: "\x1b[1;3B"                   }
-  - { key: Down,                    chars: "\x1b[B",   mode: ~AppCursor  }
-  - { key: Down,                    chars: "\x1bOB",   mode: AppCursor   }
-  - { key: F1,                      chars: "\x1bOP"                      }
-  - { key: F2,                      chars: "\x1bOQ"                      }
-  - { key: F3,                      chars: "\x1bOR"                      }
-  - { key: F4,                      chars: "\x1bOS"                      }
-  - { key: F5,                      chars: "\x1b[15~"                    }
-  - { key: F6,                      chars: "\x1b[17~"                    }
-  - { key: F7,                      chars: "\x1b[18~"                    }
-  - { key: F8,                      chars: "\x1b[19~"                    }
-  - { key: F9,                      chars: "\x1b[20~"                    }
-  - { key: F10,                     chars: "\x1b[21~"                    }
-  - { key: F11,                     chars: "\x1b[23~"                    }
-  - { key: F12,                     chars: "\x1b[24~"                    }
-  - { key: F1,       mods: Shift,   chars: "\x1b[1;2P"                   }
-  - { key: F2,       mods: Shift,   chars: "\x1b[1;2Q"                   }
-  - { key: F3,       mods: Shift,   chars: "\x1b[1;2R"                   }
-  - { key: F4,       mods: Shift,   chars: "\x1b[1;2S"                   }
-  - { key: F5,       mods: Shift,   chars: "\x1b[15;2~"                  }
-  - { key: F6,       mods: Shift,   chars: "\x1b[17;2~"                  }
-  - { key: F7,       mods: Shift,   chars: "\x1b[18;2~"                  }
-  - { key: F8,       mods: Shift,   chars: "\x1b[19;2~"                  }
-  - { key: F9,       mods: Shift,   chars: "\x1b[20;2~"                  }
-  - { key: F10,      mods: Shift,   chars: "\x1b[21;2~"                  }
-  - { key: F11,      mods: Shift,   chars: "\x1b[23;2~"                  }
-  - { key: F12,      mods: Shift,   chars: "\x1b[24;2~"                  }
-  - { key: F1,       mods: Control, chars: "\x1b[1;5P"                   }
-  - { key: F2,       mods: Control, chars: "\x1b[1;5Q"                   }
-  - { key: F3,       mods: Control, chars: "\x1b[1;5R"                   }
-  - { key: F4,       mods: Control, chars: "\x1b[1;5S"                   }
-  - { key: F5,       mods: Control, chars: "\x1b[15;5~"                  }
-  - { key: F6,       mods: Control, chars: "\x1b[17;5~"                  }
-  - { key: F7,       mods: Control, chars: "\x1b[18;5~"                  }
-  - { key: F8,       mods: Control, chars: "\x1b[19;5~"                  }
-  -