Add docs for registers, multi key remaps (#557)
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- [Installation](./install.md)
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- [Usage](./usage.md)
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- [Migrating from Vim](./from-vim.md)
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- [Configuration](./configuration.md)
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- [Themes](./themes.md)
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- [Keymap](./keymap.md)
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book/src/from-vim.md
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book/src/from-vim.md
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# Migrating from Vim
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Helix's editing model is strongly inspired from vim and kakoune, and a notable
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difference from vim (and the most striking similarity to kakoune) is that Helix
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follows the `selection → action` model. This means that the whatever you are
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going to act on (a word, a paragraph, a line, etc) is selected first and the
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action itself (delete, change, yank, etc) comes second. A cursor is simply a
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single width selection.
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> TODO: Mention texobjects, surround, registers
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| `y` | Yank selection |
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| `p` | Paste after selection |
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| `P` | Paste before selection |
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| `"` `<reg>` | Select a register to yank to or paste from |
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| `>` | Indent selection |
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| `<` | Unindent selection |
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| `=` | Format selection |
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[keys.normal]
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a = "move_char_left" # Maps the 'a' key to the move_char_left command
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w = "move_line_up" # Maps the 'w' key move_line_up
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C-S-esc = "extend_line" # Maps Control-Shift-Escape to extend_line
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"C-S-esc" = "extend_line" # Maps Control-Shift-Escape to extend_line
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g = { a = "code_action" } # Maps `ga` to show possible code actions
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[keys.insert]
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A-x = "normal_mode" # Maps Alt-X to enter normal mode
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"A-x" = "normal_mode" # Maps Alt-X to enter normal mode
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j = { k = "normal_mode" } # Maps `jk` to exit insert mode
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```
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Control, Shift and Alt modifiers are encoded respectively with the prefixes
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(Currently not fully documented, see the [keymappings](./keymap.md) list for more.)
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## Registers
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Vim-like registers can be used to yank and store text to be pasted later. Usage is similar, with `"` being used to select a register:
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- `"ay` - Yank the current selection to register `a`.
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- `"op` - Paste the text in register `o` after the selection.
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If there is a selected register before invoking a change or delete command, the selection will be stored in the register and the action will be carried out:
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- `"hc` - Store the selection in register `h` and then change it (delete and enter insert mode).
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- `"md` - Store the selection in register `m` and delete it.
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### Special Registers
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| Register character | Contains |
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| --- | --- |
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| `/` | Last search |
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| `:` | Last executed command |
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| `"` | Last yanked text |
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> There is no special register for copying to system clipboard, instead special commands and keybindings are provided. See the [keymap](keymap.md#space-mode) for the specifics.
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## Surround
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Functionality similar to [vim-surround](https://github.com/tpope/vim-surround) is built into
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