feat(cookbook, navic): improve navic component: add on_click; add hig…

…hlights to basic version

cookbook.md

@@ -774,10 +774,14 @@ new children.
 -- The easy way.
 local Navic = {
     condition = require("nvim-navic").is_available,
-    provider = require("nvim-navic").get_location,
+    provider = function()
+        require("nvim-navic").get_location({highlight=true}),
+    end
 }
 
 -- Full nerd (with icon colors)!
+-- Be careful, this implementation will work only if this component
+-- is displayied in a single window, and it is the current window.
 local Navic = {
     condition = require("nvim-navic").is_available,
     static = {
@@ -810,21 +814,41 @@ local Navic = {
             Operator = "Operator",
             TypeParameter = "Type",
         },
+        -- bit operation dark magic, see below...
+        enc = function(a, b)
+            return bit.bor(bit.lshift(a, 16), b)
+        end,
+        dec = function(c)
+            return { bit.rshift(c, 16), bit.band(c, 65535) }
+        end
     },
     init = function(self)
         local data = require("nvim-navic").get_data() or {}
         local children = {}
         -- create a child for each level
         for i, d in ipairs(data) do
+            -- encode line and column numbers into a single integer
+            local pos = self.enc(d.scope.start.line, d.scope.start.character)
             local child = {
                 {
                     provider = d.icon,
                     hl = self.type_hl[d.type],
                 },
                 {
-                    provider = d.name,
+                    -- escape `%`s (elixir) and buggy default separators
+                    provider = d.name:gsub("%%", "%%%%"):gsub("%s*->%s*", ''),
                     -- highlight icon only or location name as well
                     -- hl = self.type_hl[d.type],
+
+                    on_click = {
+                        -- pass the encoded position through minwid
+                        minwid = pos,
+                        callback = function(self, minwid)
+                            -- decode
+                            vim.api.nvim_win_set_cursor(0, self.dec(minwid))
+                        end,
+                        name = "heirline_navic",
+                    },
                 },
             }
             -- add a separator only if needed