add basic telescope support

Author: cjodo

lua/convert/telescope.lua

@@ -0,0 +1,51 @@
+local pickers = require("telescope.pickers")
+local finders = require("telescope.finders")
+local conf = require("telescope.config").values
+local actions = require("telescope.actions")
+local action_state = require("telescope.actions.state")
+local previewers = require("telescope.previewers")
+
+local M = {}
+
+M.actions_picker = function()
+  local actions_list = {
+    {
+      name = "Find current conversion",
+      fn = require("convert").find_current,
+    },
+    {
+      name = "Find next conversion",
+      fn = require("convert").find_next,
+    },
+    {
+      name = "Convert all",
+      fn = require("convert").convert_all,
+    },
+  }
+
+  pickers.new({}, {
+    prompt_title = "Convert",
+    finder = finders.new_table({
+      results = actions_list,
+      entry_maker = function(entry)
+        return {
+          value = entry,
+          display = entry.name,
+          ordinal = entry.name,
+        }
+      end,
+    }),
+    sorter = conf.generic_sorter({}),
+    attach_mappings = function(prompt_bufnr)
+      actions.select_default:replace(function()
+        actions.close(prompt_bufnr)
+        local selection = action_state.get_selected_entry()
+        selection.value.fn()
+      end)
+      return true
+    end,
+  }):find()
+end
+
+return M
+

lua/telescope/_extensions/convert.lua

@@ -0,0 +1,5 @@
+return require("telescope").register_extension({
+	exports = {
+		convert = require("convert.telescope").actions_picker
+	}
+})

lua/telescope/_extensions/convert/previewer.lua

@@ -0,0 +1,29 @@
+local previewers = require("telescope.previewers")
+
+local M = {}
+
+M.convert_previewer = previewers.new_buffer_previewer({
+  title = "Convert Preview",
+
+  define_preview = function(self, entry)
+    local buf = self.state.bufnr
+
+    vim.api.nvim_buf_set_lines(buf, 0, -1, false, {
+      entry.line,
+    })
+
+    vim.api.nvim_buf_set_option(buf, "filetype", vim.bo.filetype)
+
+    -- Lua strings are 1-indexed; Neovim cols are 0-indexed
+    vim.api.nvim_buf_add_highlight(
+      buf,
+      -1,
+      "IncSearch",
+      0,
+      entry.pos.start_col - 1,
+      entry.pos.end_col
+    )
+  end,
+})
+
+return M

lua/telescope/_extensions/convert/utils.lua

@@ -0,0 +1,36 @@
+local utils = require("convert.utils")
+
+local M = {}
+
+---@class matched
+---@field unit string
+---@field val number
+---@field pos matched_pos
+
+---@class matched_entry : matched
+---@field bufnr integer
+---@field line string
+
+M.collect_buffer_matches = function ()
+  local bufnr = vim.api.nvim_get_current_buf()
+  local lines = vim.api.nvim_buf_get_lines(bufnr, 0, -1, false)
+
+  local results = {}
+
+  for row, line in ipairs(lines) do
+    local matches = utils.find_all_units_in_line(line, row)
+    if matches then
+      for _, m in ipairs(matches) do
+        -- enrich here
+        m.bufnr = bufnr
+        m.line = line
+
+        table.insert(results, m)
+      end
+    end
+  end
+
+  return results
+end
+
+return M