Add support to start week from Sunday in calendar modal. Closes #390

Author: kristijanhusak

DOCS.md

@@ -302,6 +302,15 @@ Determine if blank line should be prepended when:
 * Adding heading via `org_meta_return` and `org_insert_*` mappings
 * Adding a list item via `org_meta_return`
 
+#### **calendar_week_start_day**
+*type*: `number`<br />
+*default value*: `1`<br />
+Available options:
+* `0` - start week on Sunday
+* `1` - start week on Monday
+
+Determine on which day the week will start in calendar modal (ex: [changing the date under cursor](#org_change_date))
+
 #### **emacs_config**
 *type*: `table`<br />
 *default value*: `{ executable_path = 'emacs', configure_path='$HOME/.emacs.d/init.el' }`<br />

lua/orgmode/config/defaults.lua

@@ -8,6 +8,7 @@ return {
   org_agenda_span = 'week', -- day/week/month/year/number of days
   org_agenda_start_on_weekday = 1,
   org_agenda_start_day = nil, -- start from today + this modifier
+  calendar_week_start_day = 1,
   org_capture_templates = {
     t = {
       description = 'Task',

lua/orgmode/objects/calendar.lua

@@ -1,6 +1,7 @@
 local Date = require('orgmode.objects.date')
 local utils = require('orgmode.utils')
 local Promise = require('orgmode.utils.promise')
+local config = require('orgmode.config')
 ---@class Calendar
 ---@field win number
 ---@field buf number
@@ -88,10 +89,17 @@ end
 
 function Calendar.render()
   vim.api.nvim_buf_set_option(Calendar.buf, 'modifiable', true)
+  local start_from_sunday = config.calendar_week_start_day == 0
 
   local first_row = { 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun' }
+  if start_from_sunday then
+    first_row = { 'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat' }
+  end
   local content = { {}, {}, {}, {}, {}, {} }
   local start_weekday = Calendar.month:get_isoweekday()
+  if start_from_sunday then
+    start_weekday = Calendar.month:get_weekday()
+  end
   while start_weekday > 1 do
     table.insert(content[1], '  ')
     start_weekday = start_weekday - 1