Updated context_manager/init.lua

Created new director lua/ and moved presser/ into the subdirectory.
This is to align with other standard developments of Neovim extensions.

init.lua

@@ -1,130 +0,0 @@
-local popup = require'plenary.popup'
-local utils = require'presser.utils'
-
-local api = vim.api
-
-local presser = {}  -- list of functions to be exported
-local g = vim.g
-
-g.presser_buf_ctx = {} -- setup a new global context manager for windows/buffers
-
--- :@Dev: close all Presser windows that may be open for all contexts
-presser.close = function ()
-  for _type, ctx in pairs( g.presser_buf_ctx ) do
-    for _, win_id in pairs( ctx ) do
-      api.nvim_win_close( win_id, true ) -- buffer contents are irrelevant in this context to save
-    end
-  end
-
-  g.presser_buf_ctx = {} -- clear the global context manager
-end
-
--- @Description: Construct a new instance of a window and buffer using the 'plenary.popup' module.
--- @Params:
---    + `_type` ~ string denoting which context manager is owner of the window.
---    + `placeholder` ~ string allowing for placeholder text to be placed within the buffer when constructed.
---    + `opts` ~ a table of additional options to be provided when constructing the window.
--- @Returns: nil. Constructs a new window and stores the window's ID in a global table.
---
--- @Dev: This function is to be as generic for creating a window whilst allowing for as much customisation over the
--- window/buffer which are to be constructed. Users are to access this function so is not part of the module export.
--- However, it's used by all internal built-ins which are meant to be used by users. Consider a class constructor in
--- C++, this function is akin to that behaviour and is responsible for constructing the window/buffer and ensuring it
--- can be tracked by Vim itself.
-local new = function ( _type, placeholder, opts )
-  -- create new manager for handling windows in the 
-  local manager = g.presser_buf_ctx
-  -- create specific context manager if it doesn't exist
-  if not manager[_type] then
-    manager[_type] = {}
-    g.presser_buf_ctx = manager
-  end
-
-  local opts = opts or {}
-  local placeholder = placeholder or ""
-  
-  local buf_opts = {
-    minwidth = 80, -- getwin_w() / 2 - ((getwin_w() % 2) / 2),
-    borderchars = { "─", "│", "─", "│", "╭", "╮", "╯", "╰" },
-  }
-
-  if opts.window then
-    for k,v in pairs( opts.window ) do
-      buf_opts[k] = v
-    end
-  end
-
-  local obj = popup.create( placeholder, buf_opts )
-  table.insert( manager[_type], obj )
-  g.presser_buf_ctx = manager
-
-  -- :@Dev: handle for keybindings (TODO: any future stuff below here once window is made)
-  local buf_id = function ()
-    return api.nvim_win_get_buf(obj)
-  end
-
-  -- handle for key bindings
-  if opts.keybinds then
-    for mode, mode_map in pairs( opts.keybinds ) do
-      mode = string.lower(mode)
-
-      for key_bind, key_action in pairs(mode_map) do
-        local key_bind = api.nvim_replace_termcodes(key_bind, true, false, true),
-        api.nvim_buf_set_keymap(buf_id(), mode, key_bind, key_action,
-          { noremap = true, silent = true }
-        )
-      end
-    end
-  end
-end
-
--- @Description: Find and replace words within the current buffer.
--- @Params:
--- @Returns: nil.
---
--- @Dev: function is responsible to creating all required buffers to allow full user interaction.
---
--- @Future: implementation may allow for greater user customisation similar to what's found with
--- extensions such as Telescope. For now, it should provide a concrete UI for purpose of design.
-function presser.find_replace()
-  -- define the context which these windows will belong to in the context manager.
-  local ctx = "find_replace"
-  
-  local keymap = {
-    n = {
-      ["<esc>"] = "<cmd>lua require'presser'.close()<CR>",
-    },
-  }
-
-  -- options for the title buffer of the built-in
-  local opts = {
-    window = {
-      line = 12,
-      border = false,
-      minwidth = 82,
-      padding = { 0, 1, 1, 1 }
-    },
-    keybinds = keymap,
-  }
-  local tab_title = new( ctx, "Find & Replace", opts )
-
-  -- options for the replace buffer
-  local opts = {
-    window = {
-      line = 18,
-      title = "Replace",
-    },
-    keybinds = keymap,
-  }
-  local replace = new( ctx, nil, opts )
-
-  -- modify options for find buffer
-  opts["window"]["line"] = 15
-  opts["window"]["title"] = "Find"
-  local find = new ( ctx, nil, opts )
-
-  api.nvim_feedkeys('A', 'n', false)
-end
-
-
-return presser

lua/presser/actions/init.lua

@@ -0,0 +1,72 @@
+local gcm = require'presser.context_manager'
+local utils = require'presser.utils'
+
+local a = vim.api
+
+local actions = {}
+
+-- :@Dev: close all Presser windows that may be open for all contexts
+actions.close = function ()
+  gcm.flush() -- invoke the context manager to flush the table
+end
+
+actions.move_next_buffer = function ()
+  local ctxs = 0
+  local c = gcm.get_global_context_manager()
+  local buf = a.nvim_get_current_buf()
+
+  for _, v in pairs( c ) do for idx, _ in pairs( v ) do ctxs = idx end end
+
+  for _, ctx_obj in pairs( c ) do
+    for idx, obj in pairs( ctx_obj ) do
+      if a.nvim_win_get_buf( obj.id ) == buf then
+        -- get the next window, and put cursor there
+        local s = idx
+        repeat
+          local win = ctx_obj[(idx % ctxs) + 1]
+          if win.allowed then
+            a.nvim_set_current_win( ctx_obj[(idx % ctxs) + 1].id )
+            break
+          end
+          idx = (idx % ctxs) + 1
+        until s == idx
+      end
+    end
+  end
+end
+
+local read_buffer = function ()
+  local c = vim.g.presser_buf_ctx
+
+  local b = {}
+  for _, ctx_obj in pairs( c ) do
+    for _, obj in pairs( ctx_obj ) do
+      if obj.allowed then
+        local buf = a.nvim_win_get_buf( obj.id )
+        table.insert(b, utils.clean_buf( a.nvim_buf_get_lines( buf, 0, -1, false )[1] ))
+      end
+    end
+  end
+
+  return b
+end
+
+actions.execute = function ()
+  local result = read_buffer()
+  actions.close()
+
+  local cmd = ":%s/" .. result[1] .. "/" .. result[2] .. "/g"
+  a.nvim_exec( cmd, false )
+end
+
+actions.buf_put_curser_at = function ( label )
+  for _, ctx_obj in pairs( vim.g.presser_buf_ctx ) do
+    for _, record in pairs( ctx_obj ) do
+      if record.what == label then
+        a.nvim_set_current_win( record.id )
+      end
+    end
+  end
+end
+
+return actions

lua/presser/builtins/__modules.lua

@@ -0,0 +1,83 @@
+local gcm = require'presser.context_manager'
+local steamers = require'presser.steamers'
+local actions = require'presser.actions'
+
+local a = vim.api
+
+local modules = {}
+
+-- @Description: Find and replace words within the current buffer.
+-- @Params:
+-- @Returns: nil.
+--
+-- @Dev: function is responsible to creating all required buffers to allow full user interaction.
+--
+-- @Future: implementation may allow for greater user customisation similar to what's found with
+-- extensions such as Telescope. For now, it should provide a concrete UI for purpose of design.
+modules.find_replace = function ()
+  -- define the context which these windows will belong to in the context manager.
+  local ctx = "find_replace"
+  gcm.create( ctx )
+  
+  local keymap = {
+    n = {
+      ["<esc>"] = "<cmd>lua require'presser.actions'.close()<CR>",
+      ["<A-a>"] = "<cmd>lua require'presser.actions'.execute()<CR>",
+    },
+    i = {
+      ["<down>"] = "<cmd>lua require'presser.actions'.move_next_buffer()<CR>",
+      ["<A-a>"] = "<cmd>lua require'presser.actions'.execute()<CR>",
+    }
+  }
+
+  -- get the centre of the current buffer
+  local c_cols = math.floor( a.nvim_win_get_width(0) / 2 )
+  local c_lines = math.floor( a.nvim_win_get_height(0) / 2 )
+
+  -- create a title buffer for the steamer
+  steamers
+    .new( ctx, {
+      label = "presser_title",
+      steamer = {
+        placeholder = "Find & Replace",
+        allowed = false,
+        window = {
+          line = c_lines - 3,
+          border = false,
+          minwidth = 82,
+          padding = { 0, 1, 1, 1 }
+        }
+      }
+    } )
+
+  -- create a new buffer for find pattern
+  steamers
+    .new ( ctx, {
+      label = "find_buf",
+      steamer = {
+        window = {
+          line = c_lines,
+          title = "Find",
+        },
+        keybinds = keymap,
+      }
+    } )
+
+  -- create a new buffer for replace pattern
+  steamers
+    .new( ctx, {
+      label = "replace_buf",
+      steamer = {
+        window = {
+          line = c_lines + 3,
+          title = "Replace",
+        },
+        keybinds = keymap,
+      }
+    } )
+
+  local result = actions.buf_put_curser_at( "find_buf" )
+  a.nvim_feedkeys('A', 'n', false)
+end
+
+return modules

lua/presser/builtins/init.lua

@@ -0,0 +1,16 @@
+local builtins = {}
+
+local function require_on_exported_call (require_path)
+  return setmetatable({}, {
+    __index = function(_, k)
+      return function(...)
+        return require(require_path)[k](...)
+      end
+    end,
+  })
+end
+
+
+builtins.find_replace = require_on_exported_call("presser.builtins.__modules").find_replace
+
+return builtins

lua/presser/context_manager/init.lua

@@ -0,0 +1,120 @@
+local a = vim.api
+local g = vim.g
+
+-- @Dev: The following table layout is the structure of contexts stored in the global manager.
+--
+-- vim.g.presser_buf_ctx = {
+--    <ctx> = {
+--        <int> {
+--            id = <win_id>,
+--            what = "Name of window" | id,
+--            allowed = true | false,
+--        },
+--        ...
+--    }
+-- }
+--
+
+-- setup a new global context manager for windows/buffers
+g.presser_buf_ctx = g.presser_buf_ctx or {} 
+
+local M = {}
+
+-- @TODO: getters which might be useful
+--    + get_win_by_name
+--    + get_idx_from_win_id
+--    + get_next_allowed_win
+--    + get_prev_allowed_win
+
+
+-- @Description: Create a new context in the global context manager if it doesn't already exist.
+-- @Params:
+--    + `ctx` ~ A string which represents the name of the new context to be created.
+-- @Returns: nil. Updates the global context manager with a new context.
+--
+-- @Dev: note that this function shouldn't be responsible for multiple contexts existing in the global manager. Whilst
+-- it's possible that multiple contexts could exist, it would imply multiple UIs open at once, so unideal.
+M.create = function ( ctx )
+  local c = g.presser_buf_ctx
+  -- create specific context manager if it doesn't exist
+  if not c[ctx] then
+    c[ctx] = {}
+    g.presser_buf_ctx = c
+  end
+end
+
+
+-- @Description: Update a context within the global context manager with a new buffer record. If the context doesn't
+-- exist, this function will guarantee that it does. If an ID for the window to be recorded in the context manager isn't
+-- provided, then this function errors. The table passed to `obj` must contain the key `id` for the function to succeed.
+-- The fields are as followed:
+--    + `id` ~ A number which is given when a new buffer window is constructed.
+--    + `what` ~ A string which gives the ID meaning; a label for the window (not related to buffer).
+--    + `allowed` ~ A boolean value which tells the context manager if the cursor is allowed in a window (virtually 
+--    disables the buffer).
+--
+--  `id` is the unique value to the record. Whilst `what` is a guaranteed value, its uniqueness isn't guaranteed in a
+--  given context. Since `what` can be used to fetch the associated `id` of the record, it should be unique from other
+--  records to prevent conflicts within a context to multiple window IDs.
+-- @Params:
+--    + `ctx` ~ A string representing the context which the record will be added to in the global context manager.
+--    + `obj` ~ A table holding one argument and two optionals.
+-- @Returns: bool.
+--
+-- @Dev: this function should require proper error handling to alert a dev when something really should be guaranteed,
+-- such as ID. (bool is fine to return, so perhaps error handling should be considered here for benefits).
+M.update = function ( ctx, obj )
+  -- ensure that the context exists
+--  if not g.presser_buf_ctx[ctx] then
+--    M.create( ctx )
+--  end
+  
+  if not obj.id then
+    print("[ERROR - context_manager]  cannot allocate window. No ID was provided.")
+    return false
+  end
+
+  if obj.allowed == nil then
+    obj.allowed = true
+  end
+
+  -- construct new buffer record for context
+  local data = {
+    id = obj.id,
+    what = obj.what or obj.id,
+    allowed = obj.allowed,
+  }
+
+  -- read the global context buffer and add new buffer to context
+  local c = g.presser_buf_ctx
+  table.insert(c[ctx], data)
+  
+  g.presser_buf_ctx = c
+  return true
+end
+
+
+-- @Description: Flush the contents of the global context manager and destroy all associated windows and buffers to a
+-- context. Any information stored in the buffers is not saved during this process. Any such buffer contents should be
+-- handled before calling to flush.
+-- @Params: nil.
+-- @Returns: nil. Destroys all windows/buffers and clears the global context manager
+--
+-- @Dev: This is why it's important to guarantee that the IDs are stored in the context manager. They are required here
+-- to close the windows using the vim API calls, and force closing them too.
+M.flush = function ()
+  for _, ctx_tbl in pairs( g.presser_buf_ctx ) do
+    for _, data in pairs( ctx_tbl ) do
+      --print("Deleting:", _, data.id)
+      a.nvim_win_close( data.id, true ) -- buffer contents are irrelevant in this context to save
+    end
+  end
+
+  g.presser_buf_ctx = {} -- clear the global context manager
+end
+
+M.get_global_context_manager = function ()
+  return g.presser_buf_ctx
+end
+
+return M

lua/presser/init.lua

@@ -0,0 +1,34 @@
+local builtins = require'presser.builtins'
+
+local a = vim.api
+
+local presser = {}  -- list of functions to be exported
+
+presser.setup = function ( opts )
+  local opts = opts or {}
+  -- @Dev: TODO - construct setup function for configs
+  --
+
+  --map("n", "<Leader>h", "<cmd>lua require'presser'.find_replace()<CR>") -- global replace with last buffer item
+
+  a.nvim_create_user_command(
+    'Presser',
+    function ( o )
+      local args = {}
+      for arg in string.gmatch( o.args, "%S+" ) do
+        table.insert( args, arg )
+      end
+      builtins[args[1]]()
+    end,
+    {
+      nargs = 1,
+      complete = function (ArgLead, CmdLine, CursorPos)
+        return { 'find_replace' }
+      end,
+    }
+  )
+
+
+end
+
+return presser

lua/presser/steamers.lua

@@ -0,0 +1,78 @@
+local popup = require'plenary.popup'
+local gcm = require'presser.context_manager'
+
+local a = vim.api
+
+local steamers = {}
+
+local Steamer = {}
+Steamer.__index = Steamer
+
+-- @Description: Construct a new instance of a window and buffer using the 'plenary.popup' module.
+-- @Params:
+--    + `_type` ~ string denoting which context manager is owner of the window.
+--    + `placeholder` ~ string allowing for placeholder text to be placed within the buffer when constructed.
+--    + `opts` ~ a table of additional options to be provided when constructing the window.
+-- @Returns: nil. Constructs a new window and stores the window's ID in a global table.
+--
+-- @Dev: This function is to be as generic for creating a window whilst allowing for as much customisation over the
+-- window/buffer which are to be constructed. Users are to access this function so is not part of the module export.
+-- However, it's used by all internal built-ins which are meant to be used by users. Consider a class constructor in
+-- C++, this function is akin to that behaviour and is responsible for constructing the window/buffer and ensuring it
+-- can be tracked by Vim itself.
+function Steamer:new ( _ctx, label, opts )
+  local opts = opts or {}
+  if not opts.placeholder then
+    opts["placeholder"] = ""
+  end
+  
+  local buf_opts = {
+    minwidth = 80, -- getwin_w() / 2 - ((getwin_w() % 2) / 2),
+    borderchars = { "─", "│", "─", "│", "╭", "╮", "╯", "╰" },
+  }
+
+  if opts.window then
+    for k,v in pairs( opts.window ) do
+      buf_opts[k] = v
+    end
+  end
+
+  print("building window: ", opts.placeholder, buf_opts )
+  local obj = popup.create( opts.placeholder, buf_opts )
+  gcm.update( _ctx, { id = obj, what = label, allowed = opts.allowed } )
+  -- :TODO: call update function in context manager
+--  table.insert( manager[_type], obj )
+--  g.presser_buf_ctx = manager
+
+  -- :@Dev: handle for keybindings (TODO: any future stuff below here once window is made)
+  local buf_id = function ()
+    return a.nvim_win_get_buf(obj)
+  end
+
+  -- handle for key bindings
+  if opts.keybinds then
+    for mode, mode_map in pairs( opts.keybinds ) do
+      mode = string.lower(mode)
+
+      for key_bind, key_action in pairs(mode_map) do
+        local key_bind = a.nvim_replace_termcodes(key_bind, true, false, true),
+        a.nvim_buf_set_keymap(buf_id(), mode, key_bind, key_action,
+          { noremap = true, silent = true }
+        )
+      end
+    end
+  end
+end
+
+steamers.new = function ( ctx, opts )
+  -- error if the provided option is not type string
+  assert( type(opts.label) == "string", "Should be string, found type: " .. type(opts.label) ) 
+
+  -- @Dev: function can provide greater wrapper options in future.
+
+  return Steamer:new( ctx, opts.label, opts.steamer )
+end
+
+steamers._Steamer = Steamer
+
+return steamers

lua/presser/utils.lua

@@ -28,8 +28,7 @@ end
 -- :@dev: clean the text once it has been fetched from buffer
 M.clean_buf = function ( text )
   if not type(text) == "string" or text == nil then
-    print("[DEBUG - clean_buf]  Given input is not of type string.")
+    return ""
-    return
   end
 
   return escape_chars( text )