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Dan7h3x
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README.md
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README.md
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# signup.nvim
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# signup.nvim
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A little (smart maybe) lsp signature helper for neovim.
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A little (smart maybe) lsp signature helper for neovim.
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---
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# Neovim Signature Help Plugin
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This Neovim plugin provides a signature help feature for LSP (Language Server Protocol) clients. It displays function signatures and parameter information in a floating window as you type in insert mode or move the cursor in normal mode. The plugin also includes a notification system to display messages with different levels of severity (info, warning, error).
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## Features
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- **Signature Help**: Displays function signatures and parameter information in a floating window.
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- **Toggle Mode**: Toggle signature help in normal mode.
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- **Customizable**: Highly customizable with options for icons, colors, and more.
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- **Integration**: Integrates with nvim-treesitter for syntax highlighting.
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- **Notifications**: Displays notifications for errors, warnings, and info messages.
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## Installation
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### Using [lazy.nvim](https://github.com/folke/lazy.nvim)
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Add the following to your `init.lua`:
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```lua
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require("lazy").setup({
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{
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"Dan7h3x/signup.nvim",
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config = function()
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require("signup").setup({
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-- Your configuration options here
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})
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end
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}
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})
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```
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### Using Vim-Plug
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Add the following to your `init.vim`:
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```vim
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Plug "Dan7h3x/signup.nvim"
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```
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Then, in your `init.lua`:
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```lua
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lua << EOF
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require('signup').setup({
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-- Your configuration options here
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})
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EOF
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```
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## Configuration
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The plugin comes with a default configuration, but you can customize it according to your preferences. Here are the available options:
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```lua
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require('signup').setup({
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silent = false,
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number = true,
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icons = {
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parameter = " ",
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method = " ",
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documentation = " ",
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},
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colors = {
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parameter = "#86e1fc",
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method = "#c099ff",
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documentation = "#4fd6be",
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},
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border = "rounded",
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winblend = 10,
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override = true, -- Override default LSP handler for signatureHelp
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})
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```
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### Options
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- **silent**: If `true`, suppresses notifications. Default is `false`.
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- **number**: If `true`, displays the signature index. Default is `true`.
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- **icons**: Custom icons for method, parameter, and documentation.
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- **colors**: Custom colors for method, parameter, and documentation.
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- **border**: Border style for the floating window. Default is `"rounded"`.
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- **winblend**: Transparency level for the floating window. Default is `10`.
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- **override**: If `true`, overrides the default LSP handler for `textDocument/signatureHelp`. Default is `true`.
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## Usage
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### Toggle Signature Help in Normal Mode
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You can toggle the signature help in normal mode using the default keybinding `<C-k>`. You can customize this keybinding in the setup function:
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```lua
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require('signup').setup({
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toggle_key = "<C-k>", -- Customize the toggle key here
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})
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```
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### Trigger Signature Help in Insert Mode
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The signature help is automatically triggered when you move the cursor or change text in insert mode.
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### Notifications
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The plugin includes a notification system to display messages with different levels of severity (info, warning, error). These notifications are displayed in a floating window and automatically disappear after a few seconds.
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## Highlight Groups
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The plugin defines the following highlight groups:
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- **LspSignatureActiveParameter**: Highlight for the active parameter.
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- **SignatureHelpMethod**: Highlight for method icons.
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- **SignatureHelpParameter**: Highlight for parameter icons.
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- **SignatureHelpDocumentation**: Highlight for documentation icons.
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- **NotificationInfo**: Highlight for info notifications.
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- **NotificationWarn**: Highlight for warning notifications.
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- **NotificationError**: Highlight for error notifications.
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## Examples
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### Customizing Icons and Colors
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```lua
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require('signup').setup({
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icons = {
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parameter = " ",
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method = " ",
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documentation = " ",
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},
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colors = {
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parameter = "#ffa500",
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method = "#8a2be2",
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documentation = "#008000",
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},
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})
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```
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### Disabling Notifications
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```lua
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require('signup').setup({
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silent = true,
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})
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```
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## Contributing
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Contributions are welcome! Please feel free to submit a pull request or open an issue if you encounter any problems or have suggestions for improvements.
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## License
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This plugin is licensed under the MIT License. See the [LICENSE](LICENSE) file for more details.
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---
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## Good Color Schemes
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To make your signature help window look even better, you can use the following color schemes:
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### Gruvbox
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```lua
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vim.cmd([[
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colorscheme gruvbox
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highlight NormalFloat guibg=#3c3836 guifg=#ebdbb2
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highlight FloatBorder guifg=#8ec07c
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highlight LspSignatureActiveParameter guifg=#fabd2f guibg=#3c3836 gui=bold
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highlight SignatureHelpMethod guifg=#83a598
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highlight SignatureHelpParameter guifg=#b8bb26
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highlight SignatureHelpDocumentation guifg=#d3869b
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highlight NotificationInfo guifg=#8ec07c guibg=#3c3836
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highlight NotificationWarn guifg=#fabd2f guibg=#3c3836
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highlight NotificationError guifg=#fb4934 guibg=#3c3836
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]])
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```
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### Nord
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```lua
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vim.cmd([[
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colorscheme nord
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highlight NormalFloat guibg=#3b4252 guifg=#e5e9f0
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highlight FloatBorder guifg=#81a1c1
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highlight LspSignatureActiveParameter guifg=#88c0d0 guibg=#3b4252 gui=bold
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highlight SignatureHelpMethod guifg=#81a1c1
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highlight SignatureHelpParameter guifg=#a3be8c
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highlight SignatureHelpDocumentation guifg=#b48ead
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highlight NotificationInfo guifg=#81a1c1 guibg=#3b4252
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highlight NotificationWarn guifg=#ebcb8b guibg=#3b4252
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highlight NotificationError guifg=#bf616a guibg=#3b4252
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]])
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```
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### OneDark
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```lua
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vim.cmd([[
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colorscheme onedark
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highlight NormalFloat guibg=#282c34 guifg=#abb2bf
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highlight FloatBorder guifg=#61afef
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highlight LspSignatureActiveParameter guifg=#e06c75 guibg=#282c34 gui=bold
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highlight SignatureHelpMethod guifg=#61afef
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highlight SignatureHelpParameter guifg=#98c379
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highlight SignatureHelpDocumentation guifg=#c678dd
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highlight NotificationInfo guifg=#61afef guibg=#282c34
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highlight NotificationWarn guifg=#e5c07b guibg=#282c34
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highlight NotificationError guifg=#e06c75 guibg=#282c34
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]])
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```
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Feel free to customize these color schemes to match your personal preferences!
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---
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@ -0,0 +1,340 @@
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local api = vim.api
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local M = {}
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local SignatureHelp = {}
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SignatureHelp.__index = SignatureHelp
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function SignatureHelp.new()
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return setmetatable({
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win = nil,
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buf = nil,
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timer = nil,
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visible = false,
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current_signatures = nil,
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enabled = false,
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normal_mode_active = false,
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config = {
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silent = false,
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number = true,
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icons = {
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parameter = " ",
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method = " ",
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documentation = " ",
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},
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colors = {
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parameter = "#86e1fc",
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method = "#c099ff",
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documentation = "#4fd6be",
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},
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border = "rounded",
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winblend = 10,
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}
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}, SignatureHelp)
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end
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local function signature_index_comment(index)
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if #vim.bo.commentstring ~= 0 then
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return vim.bo.commentstring:format(index)
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else
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return '(' .. index .. ')'
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end
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end
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local function markdown_for_signature_list(signatures, config)
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local lines, labels = {}, {}
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local number = config.number and #signatures > 1
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for index, signature in ipairs(signatures) do
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table.insert(labels, #lines + 1)
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local suffix = number and (' ' .. signature_index_comment(index)) or ''
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table.insert(lines, string.format("```%s", vim.bo.filetype))
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table.insert(lines, string.format("%s %s%s", config.icons.method, signature.label, suffix))
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table.insert(lines, "```")
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if signature.parameters and #signature.parameters > 0 then
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table.insert(lines, "")
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table.insert(lines, string.format("%s Parameters:", config.icons.parameter))
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for _, param in ipairs(signature.parameters) do
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table.insert(lines, string.format(" • %s", param.label))
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end
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end
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if signature.documentation then
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table.insert(lines, "")
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table.insert(lines, string.format("%s Documentation:", config.icons.documentation))
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vim.list_extend(lines, vim.split(signature.documentation.value or signature.documentation, "\n"))
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end
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if index ~= #signatures then
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table.insert(lines, "---")
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end
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end
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return lines, labels
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end
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function SignatureHelp:create_float_window(contents)
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local width = math.min(45, vim.o.columns)
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local height = math.min(#contents, 4)
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local cursor = api.nvim_win_get_cursor(0)
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local row = cursor[1] - api.nvim_win_get_cursor(0)[1]
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local win_config = {
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relative = "cursor",
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row = row - 7,
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col = 0,
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width = width,
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height = height,
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style = "minimal",
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border = self.config.border,
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}
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if self.win and api.nvim_win_is_valid(self.win) then
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api.nvim_win_set_config(self.win, win_config)
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api.nvim_win_set_buf(self.win, self.buf)
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else
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self.buf = api.nvim_create_buf(false, true)
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self.win = api.nvim_open_win(self.buf, false, win_config)
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end
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api.nvim_buf_set_option(self.buf, "modifiable", true)
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api.nvim_buf_set_lines(self.buf, 0, -1, false, contents)
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api.nvim_buf_set_option(self.buf, "modifiable", false)
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api.nvim_win_set_option(self.win, "foldenable", false)
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api.nvim_win_set_option(self.win, "wrap", false)
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api.nvim_win_set_option(self.win, "winblend", self.config.winblend)
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self.visible = true
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end
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function SignatureHelp:hide()
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if self.visible then
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pcall(api.nvim_win_close, self.win, true)
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pcall(api.nvim_buf_delete, self.buf, { force = true })
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self.win = nil
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self.buf = nil
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self.visible = false
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self.current_signatures = nil
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end
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end
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function SignatureHelp:set_active_parameter_highlights(active_parameter, signatures, labels)
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if not self.buf or not api.nvim_buf_is_valid(self.buf) then return end
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api.nvim_buf_clear_namespace(self.buf, -1, 0, -1)
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for index, signature in ipairs(signatures) do
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local parameter = signature.activeParameter or active_parameter
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if parameter and parameter >= 0 and parameter < #signature.parameters then
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local label = signature.parameters[parameter + 1].label
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if type(label) == "string" then
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vim.fn.matchadd("LspSignatureActiveParameter", "\\<" .. label .. "\\>")
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elseif type(label) == "table" then
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api.nvim_buf_add_highlight(self.buf, -1, "LspSignatureActiveParameter", labels[index], unpack(label))
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end
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end
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end
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-- Add icon highlights
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local icon_highlights = {
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{ self.config.icons.method, "SignatureHelpMethod" },
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{ self.config.icons.parameter, "SignatureHelpParameter" },
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{ self.config.icons.documentation, "SignatureHelpDocumentation" },
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}
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for _, icon_hl in ipairs(icon_highlights) do
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local icon, hl_group = unpack(icon_hl)
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local line_num = 0
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while line_num < api.nvim_buf_line_count(self.buf) do
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local line = api.nvim_buf_get_lines(self.buf, line_num, line_num + 1, false)[1]
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local start_col = line:find(vim.pesc(icon))
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if start_col then
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api.nvim_buf_add_highlight(self.buf, -1, hl_group, line_num, start_col - 1, start_col + #icon - 1)
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end
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line_num = line_num + 1
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end
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end
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end
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function SignatureHelp:display(result)
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if not result or not result.signatures or #result.signatures == 0 then
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self:hide()
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return
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end
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local markdown, labels = markdown_for_signature_list(result.signatures, self.config)
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if vim.deep_equal(result.signatures, self.current_signatures) then
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return
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end
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self.current_signatures = result.signatures
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if #markdown > 0 then
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self:create_float_window(markdown)
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api.nvim_buf_set_option(self.buf, "filetype", "markdown")
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self:set_active_parameter_highlights(result.activeParameter, result.signatures, labels)
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self:apply_treesitter_highlighting()
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else
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self:hide()
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end
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end
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|
function SignatureHelp:apply_treesitter_highlighting()
|
||||||
|
if not pcall(require, "nvim-treesitter") then
|
||||||
|
return
|
||||||
|
end
|
||||||
|
|
||||||
|
require("nvim-treesitter.highlight").attach(self.buf, "markdown")
|
||||||
|
end
|
||||||
|
|
||||||
|
function SignatureHelp:trigger()
|
||||||
|
if not self.enabled then return end
|
||||||
|
|
||||||
|
local params = vim.lsp.util.make_position_params()
|
||||||
|
vim.lsp.buf_request(0, "textDocument/signatureHelp", params, function(err, result, _, _)
|
||||||
|
if err then
|
||||||
|
if not self.config.silent then
|
||||||
|
vim.notify("Error in LSP Signature Help: " .. vim.inspect(err), vim.log.levels.ERROR)
|
||||||
|
end
|
||||||
|
self:hide()
|
||||||
|
return
|
||||||
|
end
|
||||||
|
|
||||||
|
if result then
|
||||||
|
self:display(result)
|
||||||
|
else
|
||||||
|
self:hide()
|
||||||
|
if not self.config.silent then
|
||||||
|
vim.notify("No signature help available", vim.log.levels.INFO)
|
||||||
|
end
|
||||||
|
end
|
||||||
|
end)
|
||||||
|
end
|
||||||
|
|
||||||
|
function SignatureHelp:check_capability()
|
||||||
|
local clients = vim.lsp.get_clients()
|
||||||
|
for _, client in ipairs(clients) do
|
||||||
|
if client.server_capabilities.signatureHelpProvider then
|
||||||
|
self.enabled = true
|
||||||
|
return
|
||||||
|
end
|
||||||
|
end
|
||||||
|
self.enabled = false
|
||||||
|
end
|
||||||
|
|
||||||
|
function SignatureHelp:toggle_normal_mode()
|
||||||
|
self.normal_mode_active = not self.normal_mode_active
|
||||||
|
if self.normal_mode_active then
|
||||||
|
self:trigger()
|
||||||
|
else
|
||||||
|
self:hide()
|
||||||
|
end
|
||||||
|
end
|
||||||
|
|
||||||
|
function SignatureHelp:setup_autocmds()
|
||||||
|
local group = api.nvim_create_augroup("LspSignatureHelp", { clear = true })
|
||||||
|
|
||||||
|
local function debounced_trigger()
|
||||||
|
if self.timer then
|
||||||
|
vim.fn.timer_stop(self.timer)
|
||||||
|
end
|
||||||
|
self.timer = vim.fn.timer_start(30, function()
|
||||||
|
self:trigger()
|
||||||
|
end)
|
||||||
|
end
|
||||||
|
|
||||||
|
api.nvim_create_autocmd({ "CursorMovedI", "TextChangedI" }, {
|
||||||
|
group = group,
|
||||||
|
callback = function()
|
||||||
|
local cmp_visible = vim.fn.exists('*cmp#visible') == 1 and vim.fn.eval('cmp#visible()') == 1
|
||||||
|
if cmp_visible then
|
||||||
|
self:hide()
|
||||||
|
elseif vim.fn.pumvisible() == 0 then
|
||||||
|
debounced_trigger()
|
||||||
|
else
|
||||||
|
self:hide()
|
||||||
|
end
|
||||||
|
end
|
||||||
|
})
|
||||||
|
|
||||||
|
api.nvim_create_autocmd({ "CursorMoved" }, {
|
||||||
|
group = group,
|
||||||
|
callback = function()
|
||||||
|
if self.normal_mode_active then
|
||||||
|
debounced_trigger()
|
||||||
|
end
|
||||||
|
end
|
||||||
|
})
|
||||||
|
|
||||||
|
api.nvim_create_autocmd({ "InsertLeave", "BufHidden", "BufLeave" }, {
|
||||||
|
group = group,
|
||||||
|
callback = function()
|
||||||
|
self:hide()
|
||||||
|
self.normal_mode_active = false
|
||||||
|
end
|
||||||
|
})
|
||||||
|
|
||||||
|
api.nvim_create_autocmd("LspAttach", {
|
||||||
|
group = group,
|
||||||
|
callback = function()
|
||||||
|
vim.defer_fn(function()
|
||||||
|
self:check_capability()
|
||||||
|
end, 100)
|
||||||
|
end
|
||||||
|
})
|
||||||
|
|
||||||
|
api.nvim_create_autocmd("ColorScheme", {
|
||||||
|
group = group,
|
||||||
|
callback = function()
|
||||||
|
if self.visible then
|
||||||
|
self:apply_treesitter_highlighting()
|
||||||
|
self:set_active_parameter_highlights(self.current_signatures.activeParameter, self.current_signatures, {})
|
||||||
|
end
|
||||||
|
end
|
||||||
|
})
|
||||||
|
end
|
||||||
|
|
||||||
|
function M.setup(opts)
|
||||||
|
opts = opts or {}
|
||||||
|
local signature_help = SignatureHelp.new()
|
||||||
|
signature_help.config = vim.tbl_deep_extend("force", signature_help.config, opts)
|
||||||
|
signature_help:setup_autocmds()
|
||||||
|
|
||||||
|
local toggle_key = opts.toggle_key or "<C-k>"
|
||||||
|
vim.keymap.set("n", toggle_key, function()
|
||||||
|
signature_help:toggle_normal_mode()
|
||||||
|
end, { noremap = true, silent = true, desc = "Toggle signature help in normal mode" })
|
||||||
|
|
||||||
|
if pcall(require, "nvim-treesitter") then
|
||||||
|
require("nvim-treesitter").define_modules({
|
||||||
|
signature_help_highlighting = {
|
||||||
|
module_path = "signature_help.highlighting",
|
||||||
|
is_supported = function(lang)
|
||||||
|
return lang == "markdown"
|
||||||
|
end,
|
||||||
|
},
|
||||||
|
})
|
||||||
|
end
|
||||||
|
|
||||||
|
vim.cmd(string.format([[
|
||||||
|
highlight default LspSignatureActiveParameter guifg=#c8d3f5 guibg=#4ec9b0 gui=bold
|
||||||
|
highlight default link FloatBorder Normal
|
||||||
|
highlight default NormalFloat guibg=#1e1e1e guifg=#d4d4d4
|
||||||
|
highlight default SignatureHelpMethod guifg=%s
|
||||||
|
highlight default SignatureHelpParameter guifg=%s
|
||||||
|
highlight default SignatureHelpDocumentation guifg=%s
|
||||||
|
]], signature_help.config.colors.method, signature_help.config.colors.parameter,
|
||||||
|
signature_help.config.colors.documentation))
|
||||||
|
|
||||||
|
if opts.override then
|
||||||
|
vim.lsp.handlers["textDocument/signatureHelp"] = function(_, result, context, config)
|
||||||
|
config = vim.tbl_deep_extend("force", signature_help.config, config or {})
|
||||||
|
signature_help:display(result)
|
||||||
|
end
|
||||||
|
end
|
||||||
|
end
|
||||||
|
|
||||||
|
return M
|
||||||
Loading…
Reference in New Issue