Add hoverRange capability

README.md

@@ -49,6 +49,7 @@ RustOpenCargo
 RustParentModule
 RustJoinLines
 RustHoverActions
+RustHoverRange 
 RustMoveItemDown
 RustMoveItemUp
 RustStartStandaloneServerForBuffer 
@@ -225,6 +226,14 @@ Note: To activate hover actions, run the command twice (or your hover keymap if
 require'rust-tools.hover_actions'.hover_actions()
 ```
 
+### Hover Range
+Note: Requires rust-analyzer version after 2021-08-02. Shows the type in visual mode when hovering.
+```lua
+-- Command:
+-- RustHoverRange 
+require'rust-tools.hover_range'.hover_range()
+```
+
 ### Open Cargo.toml
 ![open cargo](https://github.com/simrat39/rust-tools-demos/raw/master/open_cargo_toml.gif)
 ```lua

lua/rust-tools.lua

@@ -37,6 +37,7 @@ local function setupCommands()
             end
         },
         RustHoverActions = {require('rust-tools.hover_actions').hover_actions},
+        RustHoverRange = {require('rust-tools.hover_range').hover_range},
         RustMoveItemDown = {
             function() require('rust-tools.move_item').move_item() end
         },
@@ -73,7 +74,7 @@ local function setup_capabilities()
     capabilities.textDocument.completion.completionItem.snippetSupport = true
 
     -- send actions with hover request
-    capabilities.experimental = {hoverActions = true}
+    capabilities.experimental = {hoverActions = true, hoverRange = true}
 
     -- enable auto-import
     capabilities.textDocument.completion.completionItem.resolveSupport =

lua/rust-tools/hover_range.lua

@@ -0,0 +1,27 @@
+local M = {}
+
+local function get_opts()
+    local params = vim.lsp.util.make_range_params()
+    -- set start and end of selection
+    local start_m = vim.api.nvim_buf_get_mark(0, "<")
+    local end_m = vim.api.nvim_buf_get_mark(0, ">")
+    params.range.start = {
+        character = start_m[2],
+        line = start_m[1]-1, -- vim starts counting at 1, but lsp at 0
+    }
+    params.range["end"] = {
+        character = end_m[2],
+        line = end_m[1]-1, -- vim starts counting at 1, but lsp at 0
+    }
+    params.position = params.range
+    params.range = nil
+    --print(vim.inspect(params))
+
+    return params
+end
+
+function M.hover_range()
+    vim.lsp.buf_request(0, "textDocument/hover", get_opts())
+end
+
+return M