Renamed README.md -> README.txt

Renamed README to be a plaintext file instead of Markdown due to
Markdown syntax interfering with document layout.

README.md

@@ -1,4 +0,0 @@
-# presser.nvim
-A collection of word processing tools to press over your files easier with UIs.
-
-For unstable and latest features, see the [experimental](https://git.closedless.xyz/TheOnePath/presser.nvim/src/branch/experimental) branch.

README.txt

@@ -0,0 +1,56 @@
+# presser.nvim
+A collection of word processing tools to press over your files easier with UIs.
+
+For unstable and latest features, see the [experimental](https://git.closedless.xyz/TheOnePath/presser.nvim/src/branch/experimental) branch.
+
+## Architecture
+The diagram below outlines the overall architecture of presser.nvim and how each component interacts with each other.
+
+
++++++++++++++++++++++++++++++++++           +++++++++++++++++++++++++++++++++          +++++++++++++++++++++++++++++++++ 
++                               +           +                               +          +                               +
++                               +           +                               +          +                               +
++                               +           +                               +          +                               +
++        Context Manager        +           +           Steamers            +          +            Actions            +
++                               +           +                               +          +                               +
++                               +           +                               +          +                               +
++                               +           +                               +          +                               +
++++++++++++++++++++++++++++++++++           +++++++++++++++++++++++++++++++++          +++++++++++++++++++++++++++++++++
+               |                                             |                                         |
+           [5] +---------------------------------------------+-----+ [4]                               |
+                                                                   v                                   |
++++++++++++++++++++++++++++++++++                  +++++++++++++++++++++++++++++++++                   |
++                               +                  +                               +                   |
++                               +                  +                               +                   |
++                               +        [2]       +                               +         [3]       |
++           Builtins            + <--------------- +           Pressers            + <-----------------+
++                               +                  +                               +                   |
++                               +                  +                               +                   |
++                               +                  +                               +                   |
++++++++++++++++++++++++++++++++++                  +++++++++++++++++++++++++++++++++                   |
+                I                                                                                      |
+                | [1]                                                                                  | [6]
+                |                                                                                      I
++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++                               + +                                                                                    +
++             User              + +                                   Window buffer                                    +
++                               + +                                                                                    +
++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+[1] - The User interacts with Builtins to use a Presser.
+[2] - Builtins inherit Pressers and lazy loads them to be accessed by Users.
+[3] - Pressers make use of Actions to do the work.
+[4] - Pressers inherit Steamers, giving them the ability to generate UIs for the user.
+[5] - Pressers make use of the Context Manager to organise and track Steamers.
+[6] - Actions will directly modify the contents of the Window buffer.
+
+### List of Components
+
+* User + Window buffer - refers to Neovim, which has the User who does something within the Window buffer.
+* Builtins - Lazy loaded interface responsible for acting as a proxy to Pressers.
+* Pressers - Tools which allow the User to perform different word processing tasks. Comprised of Steamers, and perform
+  Actions to modify the Window buffer.
+* Steamers - Class module which is responsible for constructing buffers, creating a UI for the User.
+* Context Manager - A data structure which is used to store Steamers for a given context (the Presser). Also known as,
+  "GCM" due to being scoped to vim.g.
+* Actions - Perform an action defined for a Presser, which will modify the Window buffer in some way.

lua/presser/actions/init.lua

@@ -1,4 +1,5 @@
 local gcm = require'presser.context_manager'
+--local actions = require'presser.actions'
 local utils = require'presser.utils'
 
 local a = vim.api
@@ -59,6 +60,34 @@ actions.execute = function ()
   a.nvim_exec( cmd, false )
 end
 
+actions.hyperlink_exec = function ()
+  local url = utils.clean_buf(read_buffer()[1])
+  actions.close()
+
+  if url == "" then return nil end
+
+  local _, cur_start, _, cur_end = utils.get_selection()
+  local line = a.nvim_get_current_line()
+  if line == "" then
+    return
+  end
+
+  local row, col = unpack(a.nvim_win_get_cursor(0))
+  if cur_start == -1 then
+    cur_start, cur_end = unpack(utils.subslice(line .. " ", col))
+  end
+
+  actions.suburl( line, row, url, cur_start, cur_end )
+end
+
+actions.suburl = function (line, row, url, cur_start, cur_end)
+  local prefix = string.sub(line, 1, cur_start) -- the first part up to selection
+  local suffix = string.sub(line, cur_end + 1, line:len()) -- the last part after selection
+  local infix = "[" .. utils.clean_buf(string.sub(line, cur_start, cur_end)) .. "]" .. "(" .. url .. ")"
+
+  a.nvim_buf_set_lines( 0, row-1, row, false, { prefix .. infix .. suffix }  )
+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

lua/presser/builtins/__modules.lua

@@ -1,6 +1,7 @@
-local gcm = require'presser.context_manager'
-local steamers = require'presser.steamers'
-local actions = require'presser.actions'
+local gcm = require 'presser.context_manager'
+local steamers = require 'presser.steamers'
+local actions = require 'presser.actions'
+local utils   = require 'presser.utils'
 
 local a = vim.api
 
@@ -80,4 +81,130 @@ modules.find_replace = function ()
   a.nvim_feedkeys('A', 'n', false)
 end
 
+
+modules.hyperlink = function ()
+  local check_url = function ( text )
+    local text = string.lower( text )
+
+    -- string list of all possible URI schemes which have RFC specification and identified with permanent status
+    local patterns = "aaa|aaas|about|acap|acct|afs|cap|cid|coap|coap+tcp|coap+ws|coaps|coaps+tcp|coaps+ws|crid|data" ..
+      "|dav|dict|dns|dtn|example|fax|file|ftp|geo|go|gopher|h323|ham|http|https|iax|icap|im|imap|info|ipn|ipp|ipps" ..
+      "|iris|iris.beep|iris.lwz|iris.xpc|iris.xpcs|jms|ldap|leaptofrogans|mailserver|mailto|mid|modem|msrp|msrps" ..
+      "|mtqp|mupdate|news|nfs|ni|nih|nntp|opaquelocktoken|payto|pkcs11|pop|pres|prospero|reload|rsync|rtmfp|rtsp" ..
+      "|rtsps|rtspu|secret-token|service|session|sieve|sip|sips|sms|snews|snmp|soap.beep|soap.beeps|stun|stuns|tag" ..
+      "|tel|telnet|tftp|thismessage|tip|tn3270|turn|turns|tv|urn|vemmi|videotex|vnc|wais|ws|wss|xcon|xcon-userid" ..
+      "|xmlrpc.beep|xmlrpc.beeps|xmpp|z39.50|z39.50r|z39.50s|"
+
+    -- check if text is a type of URI
+    -- @Dev: TODO, consider option of logarithmic matching (patterns already in alphabetical order)
+    for proto in string.gmatch( patterns, "([^|]+)" ) do
+      -- if so, text can be converted directly to hyperlink (return true)
+      if string.find( text, proto ) then
+        return true
+      end
+    end
+
+    return false
+  end
+
+
+  local link_txt = nil
+  local row, col = unpack(a.nvim_win_get_cursor(0))
+  local h,j,_,l = utils.get_selection()
+  local line = a.nvim_get_current_line()
+  if vim.api.nvim_get_mode()["mode"] == "n" then
+    if (row-1) == h and (col == j or col == l) then
+      print("visual mode selection")
+      link_txt = string.sub(line, j, l)
+    else
+      link_txt = string.sub(line, unpack(utils.subslice(line, col)))
+    end
+  else
+    link_txt = vim.fn.expand "<cexpr>"
+  end
+
+  link_txt = utils.clean_buf(link_txt)
+  if link_txt == "" then
+    print("Presser.hyperlink: No text selected to convert.")
+    return
+  end
+
+  if check_url( link_txt ) then
+    print("Identified URI scheme under cursor, generating hyperlink for: " .. link_txt)
+    if not ( col == j or col == l ) then
+      j, l = unpack(utils.subslice( line .. " ", col ))
+    end
+
+    print(j,l)
+    actions.suburl( line, row, link_txt, j, l )
+    return nil
+  end
+
+  print("Cursor is not over an identified URI scheme: " .. link_txt .. ". Constructing UI...")
+
+  -- define the context which these windows will belong to in the context manager.
+  local ctx = "hyperlink"
+  gcm.create( ctx )
+
+  local keymap = {
+    n = {
+      ["<esc>"] = "<cmd>lua require'presser.actions'.close()<CR>",
+      ["<A-a>"] = "<cmd>lua require'presser.actions'.hyperlink_exec()<CR>",
+    },
+    i = {
+      ["<A-a>"] = "<cmd>lua require'presser.actions'.hyperlink_exec()<CR>",
+    }
+  }
+
+  -- get the centre of the current buffer
+  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 = "Hyperlink",
+        allowed = false,
+        window = {
+          line = c_lines - 2,
+          border = false,
+          minwidth = 82,
+          padding = { 0, 1, 1, 1 }
+        }
+      }
+    } )
+
+  steamers
+    .new( ctx, {
+      label = "selected_text",
+      steamer = {
+        placeholder = "Selected text: " .. link_txt,
+        allowed = false,
+        window = {
+          line = c_lines,
+          border = false,
+          minwidth = 82,
+          padding = { 0, 1, 1, 1 }
+        }
+      }
+    } )
+
+  -- create a new buffer for replace pattern
+  steamers
+    .new( ctx, {
+      label = "hyperlink_buf",
+      steamer = {
+        window = {
+          line = c_lines + 3,
+          title = "Hyperlink",
+        },
+        keybinds = keymap,
+      }
+    } )
+
+  local result = actions.buf_put_curser_at( "hyperlink_buf" )
+  a.nvim_feedkeys('A', 'n', false)
+end
+
 return modules

lua/presser/builtins/init.lua

@@ -12,5 +12,6 @@ end
 
 
 builtins.find_replace = require_on_exported_call("presser.builtins.__modules").find_replace
+builtins.hyperlink = require_on_exported_call("presser.builtins.__modules").hyperlink
 
 return builtins

lua/presser/init.lua

@@ -23,7 +23,7 @@ presser.setup = function ( opts )
     {
       nargs = 1,
       complete = function (ArgLead, CmdLine, CursorPos)
-        return { 'find_replace' }
+        return { 'find_replace', 'hyperlink' }
       end,
     }
   )

lua/presser/utils.lua

@@ -31,8 +31,32 @@ M.clean_buf = function ( text )
     return ""
   end
 
-  return escape_chars( text )
-    :match( "^%s*(.-)%s*$" )
+  return text:match( "^%s*(.-)%s*$" )
+end
+
+
+M.get_selection = function()
+  local _, csrow, cscol, _ = unpack(vim.fn.getpos("'<"))
+  local _, cerow, cecol, _ = unpack(vim.fn.getpos("'>"))
+  if csrow < cerow or (csrow == cerow and cscol <= cecol) then
+    return csrow - 1, cscol - 1, cerow - 1, cecol
+  else
+    return cerow - 1, cecol - 1, csrow - 1, cscol
+  end
+end
+
+
+M.subslice = function(line, col)
+    local i = 0
+    local j = 0
+    while true do
+      j = string.find(line, " ", j+1)    -- find 'next' newline
+      if  j == nil then break end
+      if j > col then break end
+      i = j
+    end
+
+    return { i, j }
 end