feat: v1 options menu (#133)

Still has a bunch of improvements that can be done, but wanted to merge in some of the related changes.

* options parser

* wip: vimoptions finder

* feat: pre-populate ex-command line with `:set foo=`

* use options current value when populating command line

* fix: use result.raw_value to store original option value

* .

* options: Continue work on option finder

* [WIP]: Tue 27 Oct 2020 10:34:09 PM EDT

* [WIP]: Mon 02 Nov 2020 08:20:13 PM EST

* [WIP]: Mon 02 Nov 2020 09:04:23 PM EST

Co-authored-by: TJ DeVries <devries.timothyj@gmail.com>

1 files changed, 100 insertions, 0 deletions

diff --git a/lua/telescope/pickers/entry_display.lua b/lua/telescope/pickers/entry_display.lua
new file mode 100644
index 0000000..c661b89
--- /dev/null
+++ b/lua/telescope/pickers/entry_display.lua
@@ -0,0 +1,100 @@
+local log = require('telescope.log')
+
+local entry_display = {}
+
+-- index are used to determine the correct order
+-- elements = {
+--   [1] = { element, max width }, -- max width should be greater than 0
+--   [2] = { a, 0 } -- Use 0 to disable max width
+--   [3] = { b, 0 } -- If b is nil, skip this column, should skip column for all rows
+-- },
+-- separator = " " -- either arbitrary string, when you wanna use the same separator between all elements
+-- separator = { " ", ":" }  -- or table, where [1] is separator between elements[1] and elements[2], etc
+
+-- TODO: Remove this and move ONLY to create method.
+
+local table_format = function(picker, elements, separator)
+  -- TODO: Truncate...
+  local win_width = vim.api.nvim_win_get_width(picker.results_win)
+
+  local output = ""
+  for k, v in ipairs(elements) do
+    local text = v[1]
+    local width = v[2]
+    if text ~= nil then
+      if k > 1 then
+        output = output .. (type(separator) == "table" and separator[k - 1] or separator)
+      end
+      if width then
+        if width == 0 then
+          output = output .. string.format("%s", text)
+        elseif width < 1 then
+          output = output .. string.format("%-" .. math.floor(width * win_width) .. "s", text)
+        else
+          output = output .. string.format("%-" .. width .."s", text)
+        end
+      else
+        output = output .. text
+      end
+    end
+  end
+  return output
+end
+
+local function truncate(str, len)
+  -- TODO: This doesn't handle multi byte chars...
+  if vim.fn.strdisplaywidth(str) > len - 1 then
+    str = str:sub(1, len)
+    str = str .. "…"
+  end
+  return str
+end
+
+entry_display.create = function(configuration)
+  local generator = {}
+  for _, v in ipairs(configuration.items) do
+    if v.width then
+      local justify = not v.right_justify and "-" or ""
+      local format_str = "%" .. justify .. v.width .. "s"
+      table.insert(generator, function(item)
+        return string.format(format_str, truncate(item, v.width))
+      end)
+    else
+      table.insert(generator, function(item)
+        return item
+      end)
+    end
+  end
+
+  return function(self, picker)
+    local results = {}
+    for k, v in ipairs(self) do
+      table.insert(results, generator[k](v, picker))
+    end
+
+    return table.concat(results, configuration.separator or "│")
+  end
+end
+
+
+entry_display.resolve = function(self, entry)
+  local display, display_highlights
+  if type(entry.display) == 'function' then
+    self:_increment("display_fn")
+    display, display_highlights = entry:display(self)
+
+    if type(display) == 'string' then
+      return display, display_highlights
+    end
+  else
+    display = entry.display
+  end
+
+  if type(display) == 'string' then
+    return display, display_highlights
+  elseif type(display) == 'table' then
+    return table_format(self, display, "│"), display_highlights
+  end
+end
+
+return entry_display