feat(explorer): added quick nav with [, ] with d/w/e for diagnostics

lua/snacks/explorer/actions.lua

@@ -1,6 +1,10 @@
 local Git = require("snacks.explorer.git")
 local Tree = require("snacks.explorer.tree")
 
+---@class snacks.explorer.diagnostic.Action: snacks.picker.Action
+---@field severity? number
+---@field up? boolean
+
 local uv = vim.uv or vim.loop
 
 local M = {}
@@ -260,4 +264,24 @@ function M.actions.confirm(picker, item, action)
   end
 end
 
+function M.actions.explorer_diagnostic(picker, item, action)
+  ---@cast action snacks.explorer.diagnostic.Action
+  local node = Tree:next(picker:cwd(), function(node)
+    if not node.severity then
+      return false
+    end
+    return action.severity == nil or node.severity == action.severity
+  end, { up = action.up, path = item and item.file })
+  if node then
+    M.update(picker, { target = node.path })
+  end
+end
+
+M.actions.explorer_diagnostic_next = { action = "explorer_diagnostic" }
+M.actions.explorer_diagnostic_prev = { action = "explorer_diagnostic", up = true }
+M.actions.explorer_warn_next = { action = "explorer_diagnostic", severity = vim.diagnostic.severity.WARN }
+M.actions.explorer_warn_prev = { action = "explorer_diagnostic", severity = vim.diagnostic.severity.WARN, up = true }
+M.actions.explorer_error_next = { action = "explorer_diagnostic", severity = vim.diagnostic.severity.ERROR }
+M.actions.explorer_error_prev = { action = "explorer_diagnostic", severity = vim.diagnostic.severity.ERROR, up = true }
+
 return M

lua/snacks/explorer/git.lua

@@ -149,31 +149,9 @@ end
 ---@param up? boolean
 function M.next(cwd, path, up)
   local Tree = require("snacks.explorer.tree")
-  path = path or cwd
-  local root = Tree:node(cwd) or nil
-  if not root then
-    return
-  end
-  local first ---@type snacks.picker.explorer.Node?
-  local last ---@type snacks.picker.explorer.Node?
-  local prev ---@type snacks.picker.explorer.Node?
-  local next ---@type snacks.picker.explorer.Node?
-  local found = false
-  Tree:walk(root, function(node)
-    local want = not node.dir and node.status and not node.ignored
-    if node.path == path then
-      found = true
-    end
-    if want then
-      first, last = first or node, node
-      next = next or (found and node.path ~= path and node) or nil
-      prev = not found and node or prev
-    end
-  end, { all = true })
-  if up then
-    return prev or last
-  end
-  return next or first
+  return Tree:next(cwd, function(node)
+    return node.status ~= nil
+  end, { up = up, path = path })
 end
 
 return M

lua/snacks/explorer/tree.lua

@@ -271,4 +271,36 @@ function Tree:close_all(cwd)
   end, { all = true })
 end
 
+---@param cwd string
+---@param filter fun(node: snacks.picker.explorer.Node):boolean?
+---@param opts? {up?: boolean, path?: string}
+function Tree:next(cwd, filter, opts)
+  opts = opts or {}
+  local path = opts.path or cwd
+  local root = self:node(cwd) or nil
+  if not root then
+    return
+  end
+  local first ---@type snacks.picker.explorer.Node?
+  local last ---@type snacks.picker.explorer.Node?
+  local prev ---@type snacks.picker.explorer.Node?
+  local next ---@type snacks.picker.explorer.Node?
+  local found = false
+  self:walk(root, function(node)
+    local want = not node.dir and filter(node) and not node.ignored
+    if node.path == path then
+      found = true
+    end
+    if want then
+      first, last = first or node, node
+      next = next or (found and node.path ~= path and node) or nil
+      prev = not found and node or prev
+    end
+  end, { all = true })
+  if opts.up then
+    return prev or last
+  end
+  return next or first
+end
+
 return Tree.new()

lua/snacks/picker/config/sources.lua

@@ -93,6 +93,12 @@ M.explorer = {
         ["Z"] = "explorer_close_all",
         ["]g"] = "explorer_git_next",
         ["[g"] = "explorer_git_prev",
+        ["]d"] = "explorer_diagnostic_next",
+        ["[d"] = "explorer_diagnostic_prev",
+        ["]w"] = "explorer_warn_next",
+        ["[w"] = "explorer_warn_prev",
+        ["]e"] = "explorer_error_next",
+        ["[e"] = "explorer_error_prev",
       },
     },
   },