Feat: LSP Type Hints (#5934)

* misc: missing inline, outdated link

* doc: Add new theme keys and config option to book

* fix: don't panic in Tree::try_get(view_id)

Necessary for later, where we could be receiving an LSP response
for a closed window, in which case we don't want to crash while
checking for its existence

* fix: reset idle timer on all mouse events

* refacto: Introduce Overlay::new and InlineAnnotation::new

* refacto: extract make_job_callback from Context::callback

* feat: add LSP display_inlay_hint option to config

* feat: communicate inlay hints support capabilities of helix to LSP server

* feat: Add function to request range of inlay hint from LSP

* feat: Save inlay hints in document, per view

* feat: Update inlay hints on document changes

* feat: Compute inlay hints on idle timeout

* nit: Add todo's about inlay hints for later

* fix: compute text annotations for current view in view.rs, not document.rs

* doc: Improve Document::text_annotations() description

* nit: getters don't use 'get_' in front

* fix: Drop inlay hints annotations on config refresh if necessary

* fix: padding theming for LSP inlay hints

* fix: tracking of outdated inlay hints should not be dependant on document revision (because of undos and such)

* fix: follow LSP spec and don't highlight padding as virtual text

* config: add some LSP inlay hint configs

1 files changed, 72 insertions, 0 deletions

diff --git a/languages.toml b/languages.toml
index 86f4a64d..83a09b0b 100644
--- a/languages.toml
+++ b/languages.toml
@@ -19,6 +19,14 @@ indent = { tab-width = 4, unit = "    " }
 '"' = '"'
 '`' = '`'
 
+[language.config]
+inlayHints.bindingModeHints.enable = false
+inlayHints.closingBraceHints.minLines = 10
+inlayHints.closureReturnTypeHints.enable = "with_block"
+inlayHints.discriminantHints.enable = "fieldless"
+inlayHints.lifetimeElisionHints.enable = "skip_trivial"
+inlayHints.typeHints.hideClosureInitialization = false
+
 [language.debugger]
 name = "lldb-vscode"
 transport = "stdio"
@@ -291,6 +299,14 @@ language-server = { command = "gopls" }
 # TODO: gopls needs utf-8 offsets?
 indent = { tab-width = 4, unit = "\t" }
 
+[language.config.hints]
+assignVariableTypes = true
+compositeLiteralFields = true
+constantValues = true
+functionTypeParameters = true
+parameterNames = true
+rangeVariableTypes = true
+
 [language.debugger]
 name = "go"
 transport = "tcp"
@@ -382,6 +398,18 @@ comment-token = "//"
 language-server = { command = "typescript-language-server", args = ["--stdio"], language-id = "javascript" }
 indent = { tab-width = 2, unit = "  " }
 
+[language.config]
+hostInfo = "helix"
+
+[language.config.javascript.inlayHints]
+includeInlayEnumMemberValueHints = true
+includeInlayFunctionLikeReturnTypeHints = true
+includeInlayFunctionParameterTypeHints = true
+includeInlayParameterNameHints = "all"
+includeInlayParameterNameHintsWhenArgumentMatchesName = true
+includeInlayPropertyDeclarationTypeHints = true
+includeInlayVariableTypeHints = true
+
 [language.debugger]
 name = "node-debug2"
 transport = "stdio"
@@ -409,6 +437,18 @@ language-server = { command = "typescript-language-server", args = ["--stdio"],
 indent = { tab-width = 2, unit = "  " }
 grammar = "javascript"
 
+[language.config]
+hostInfo = "helix"
+
+[language.config.javascript.inlayHints]
+includeInlayEnumMemberValueHints = true
+includeInlayFunctionLikeReturnTypeHints = true
+includeInlayFunctionParameterTypeHints = true
+includeInlayParameterNameHints = "all"
+includeInlayParameterNameHintsWhenArgumentMatchesName = true
+includeInlayPropertyDeclarationTypeHints = true
+includeInlayVariableTypeHints = true
+
 [[language]]
 name = "typescript"
 scope = "source.ts"
@@ -420,6 +460,18 @@ roots = []
 language-server = { command = "typescript-language-server", args = ["--stdio"], language-id = "typescript"}
 indent = { tab-width = 2, unit = "  " }
 
+[language.config]
+hostInfo = "helix"
+
+[language.config.typescript.inlayHints]
+includeInlayEnumMemberValueHints = true
+includeInlayFunctionLikeReturnTypeHints = true
+includeInlayFunctionParameterTypeHints = true
+includeInlayParameterNameHints = "all"
+includeInlayParameterNameHintsWhenArgumentMatchesName = true
+includeInlayPropertyDeclarationTypeHints = true
+includeInlayVariableTypeHints = true
+
 [[grammar]]
 name = "typescript"
 source = { git = "https://github.com/tree-sitter/tree-sitter-typescript", rev = "6aac031ad88dd6317f02ac0bb27d099a553a7d8c", subpath = "typescript" }
@@ -434,6 +486,18 @@ roots = []
 language-server = { command = "typescript-language-server", args = ["--stdio"], language-id = "typescriptreact" }
 indent = { tab-width = 2, unit = "  " }
 
+[language.config]
+hostInfo = "helix"
+
+[language.config.typescript.inlayHints]
+includeInlayEnumMemberValueHints = true
+includeInlayFunctionLikeReturnTypeHints = true
+includeInlayFunctionParameterTypeHints = true
+includeInlayParameterNameHints = "all"
+includeInlayParameterNameHintsWhenArgumentMatchesName = true
+includeInlayPropertyDeclarationTypeHints = true
+includeInlayVariableTypeHints = true
+
 [[grammar]]
 name = "tsx"
 source = { git = "https://github.com/tree-sitter/tree-sitter-typescript", rev = "6aac031ad88dd6317f02ac0bb27d099a553a7d8c", subpath = "tsx" }
@@ -740,6 +804,14 @@ comment-token = "--"
 indent = { tab-width = 2, unit = "  " }
 language-server = { command = "lua-language-server", args = [] }
 
+[language.config.Lua.hint]
+enable = true
+arrayIndex = "Enable"
+setType = true
+paramName = "All"
+paramType = true
+await = true
+
 [[grammar]]
 name = "lua"
 source = { git = "https://github.com/MunifTanjim/tree-sitter-lua", rev = "887dfd4e83c469300c279314ff1619b1d0b85b91" }