From c6f0142fc651dcbd2431630956d034c046293e7e Mon Sep 17 00:00:00 2001
From: TJ DeVries <devries.timothyj@gmail.com>
Date: Wed, 15 Jul 2020 17:53:30 -0400
Subject: Get simple rg example to work

---
 lua/telescope/mappings.lua | 124 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 lua/telescope/mappings.lua

(limited to 'lua/telescope/mappings.lua')

diff --git a/lua/telescope/mappings.lua b/lua/telescope/mappings.lua
new file mode 100644
index 0000000..b779b2f
--- /dev/null
+++ b/lua/telescope/mappings.lua
@@ -0,0 +1,124 @@
+-- TODO: Customize keymap
+local a = vim.api
+local ns_telescope_selection = a.nvim_create_namespace('telescope_selection')
+
+local state = require('telescope.state')
+
+local mappings = {}
+local keymap = {}
+local telescope_selections = {}
+
+mappings.set_keymap = function(prompt_bufnr, results_bufnr)
+  local function default_mapper(map_key, table_key)
+    a.nvim_buf_set_keymap(
+      prompt_bufnr,
+      'i',
+      map_key,
+      string.format(
+        [[<C-O>:lua __TelescopeMapping(%s, %s, '%s')<CR>]],
+        prompt_bufnr,
+        results_bufnr,
+        table_key
+        ),
+      {
+        silent = true,
+      }
+    )
+  end
+
+  default_mapper('<c-n>', 'control-n')
+  default_mapper('<c-p>', 'control-p')
+  default_mapper('<CR>', 'enter')
+end
+
+local function update_current_selection(prompt_bufnr, results_bufnr, row)
+  local status = state.get_status(prompt_bufnr)
+
+  a.nvim_buf_clear_namespace(results_bufnr, ns_telescope_selection, 0, -1)
+  a.nvim_buf_add_highlight(
+    results_bufnr,
+    ns_telescope_selection,
+    'Error',
+    row,
+    0,
+    -1
+  )
+
+  telescope_selections[prompt_bufnr] = row
+
+  if status.previewer then
+    vim.g.got_here = true
+
+    status.previewer.fn(
+      status.preview_win,
+      status.preview_bufnr,
+      status.results_bufnr,
+      row
+    )
+  end
+end
+
+
+function __TelescopeMapping(prompt_bufnr, results_bufnr, characters)
+  if keymap[characters] then
+    keymap[characters](prompt_bufnr, results_bufnr)
+  end
+end
+
+-- TODO: Refactor this to use shared code.
+-- TODO: Move from top to bottom, etc.
+-- TODO: It seems like doing this brings us back to the beginning of the prompt, which is not great.
+keymap["control-n"] = function(prompt_bufnr, results_bufnr)
+  if telescope_selections[prompt_bufnr] == nil then
+    telescope_selections[prompt_bufnr] = 0
+  end
+
+  local row = telescope_selections[prompt_bufnr] + 1
+  update_current_selection(prompt_bufnr, results_bufnr, row)
+end
+
+keymap["control-p"] = function(prompt_bufnr, results_bufnr)
+  if telescope_selections[prompt_bufnr] == nil then
+    telescope_selections[prompt_bufnr] = 0
+  end
+
+  local row = telescope_selections[prompt_bufnr] - 1
+  update_current_selection(prompt_bufnr, results_bufnr, row)
+end
+
+keymap["enter"] = function(prompt_bufnr, results_bufnr)
+  local extmark = a.nvim_buf_get_extmarks(
+    results_bufnr,
+    ns_telescope_selection,
+    0,
+    -1,
+    {}
+  )
+
+  local row = extmark[1][2]
+  if row == nil then
+    print("Could not do anything...")
+    return
+  else
+    local line = a.nvim_buf_get_lines(results_bufnr, row, row + 1, false)[1]
+    if line == nil then
+      print("Could not do anything with blank line...")
+      return
+    end
+
+    local sections = vim.split(line, ":")
+
+    local filename = sections[1]
+    local row = tonumber(sections[2])
+    local col = tonumber(sections[3])
+
+    vim.cmd(string.format([[bdelete! %s]], prompt_bufnr))
+
+    local bufnr = vim.fn.bufnr(filename, true)
+    a.nvim_set_current_buf(bufnr)
+    a.nvim_buf_set_option(bufnr, 'buflisted', true)
+    a.nvim_win_set_cursor(0, {row, col})
+  end
+end
+
+return mappings
-- 
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