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-- Copyright 2007-2009 Mitchell mitchell<att>caladbolg.net. See LICENSE.

---
-- Defines the key commands used by the Textadept key command manager.
-- For non-ascii keys, see textadept.keys for string aliases.
module('textadept.key_commands', package.seeall)

--[[
  C:               G
  A:   A   C       G     J K L     O               W X   Z
  CS:      C D     G     J   L         Q R S T U   W
  SA:  A   C D E   G H I J K L M   O   Q R S T     W X   Z
  CA:  A   C       G H   J K L     O   Q   S T   V W X Y Z
  CSA:     C D     G H   J K L     O   Q R S T U   W X   Z
]]--

---
-- Global container that holds all key commands.
-- @class table
-- @name keys
_G.keys = {}
local keys = keys

keys.clear_sequence = 'esc'

local b, v = 'buffer', 'view'
local t = textadept

keys.ct   = {} -- Textadept command chain
keys.ct.v = {} -- View chain

-- Standard commands. New, open, save, etc.
keys.ct.n = { t.new_buffer   }
keys.cr   = { t.io.open      }
keys.car  = { 'reload', b    }
keys.co   = { 'save', b      }
keys.cso  = { 'save_as', b   }
keys.cx   = { 'close', b     }
keys.csx  = { t.io.close_all }
keys.aq   = { t.quit         }
keys.cz   = { 'undo', b      }
keys.csz  = { 'redo', b      }
keys.cs   = { t.find.focus   } -- find/replace

-- Recent files.
local RECENT_FILES = 1
t.events.add_handler('user_list_selection',
  function(type, text) if type == RECENT_FILES then t.io.open(text) end end)
keys.ar = { function()
  local buffer = buffer
  local list = ''
  local sep = buffer.auto_c_separator
  buffer.auto_c_separator = ('|'):byte()
  for _, filename in ipairs(t.io.recent_files) do
    list = filename..'|'..list
  end
  buffer:user_list_show( RECENT_FILES, list:sub(1, -2) )
  buffer.auto_c_separator = sep
end }

-- Buffer/view commands.
keys.an    = { 'goto_buffer', v, 1, false                 }
keys.ap    = { 'goto_buffer', v, -1, false                }
keys.ct.s  = { 'split', v, false                          } -- horizontal
keys.ct.ss = { 'split', v                                 } -- vertical
keys.can   = { t.goto_view, 1, false                      }
keys.cap   = { t.goto_view, -1, false                     }
keys.san   = { function() view.size = view.size + 10 end  }
keys.sap   = { function() view.size = view.size - 10 end  }
keys.ct.x  = { function() view:unsplit() return true end  }
keys.ct.sx = { function() while view:unsplit() do end end }

-- Movement/selection commands
keys.cf   = { 'char_right',             b }
keys.csf  = { 'char_right_extend',      b }
keys.af   = { 'word_right',             b }
keys.saf  = { 'word_right_extend',      b }
keys.cb   = { 'char_left',              b }
keys.csb  = { 'char_left_extend',       b }
keys.ab   = { 'word_left',              b }
keys.sab  = { 'word_left_extend',       b }
keys.cn   = { 'line_down',              b }
keys.csn  = { 'line_down_extend',       b }
keys.cp   = { 'line_up',                b }
keys.csp  = { 'line_up_extend',         b }
keys.ca   = { 'vc_home',                b }
keys.csa  = { 'home_extend',            b }
keys.ce   = { 'line_end',               b }
keys.cse  = { 'line_end_extend',        b }
keys.cv   = { 'page_down',              b }
keys.csv  = { 'page_down_extend',       b }
keys.av   = { 'para_down',              b }
keys.sav  = { 'para_down_extend',       b }
keys.cy   = { 'page_up',                b }
keys.csy  = { 'page_up_extend',         b }
keys.ay   = { 'para_up',                b }
keys.say  = { 'para_up_extend',         b }
keys.ch   = { 'delete_back',            b }
keys.ah   = { 'del_word_left',          b }
keys.cd   = { 'clear',                  b }
keys.ad   = { 'del_word_right',         b }
keys.csaf = { 'char_right_rect_extend', b }
keys.csab = { 'char_left_rect_extend',  b }
keys.csan = { 'line_down_rect_extend',  b }
keys.csap = { 'line_up_rect_extend',    b }
keys.csaa = { 'vc_home_rect_extend',    b }
keys.csae = { 'line_end_rect_extend',   b }
keys.csav = { 'page_down_rect_extend',  b }
keys.csay = { 'page_up_rect_extend',    b }

-- Snippets commands.
local m_snippets = _m.textadept.lsnippets
keys.ci   = { m_snippets.insert           }
keys.csi  = { m_snippets.prev             }
keys.cai  = { m_snippets.cancel_current   }
keys.casi = { m_snippets.list             }
keys.ai   = { m_snippets.show_style       }

-- Editing commands.
local m_editing = _m.textadept.editing
keys.cm    = { m_editing.match_brace                  }
keys.csm   = { m_editing.match_brace, 'select'        }
keys['c '] = { m_editing.autocomplete_word, '%w_'     }
keys['a '] = { m_editing.autocomplete_word_from_dict,
               '/usr/share/dict/cracklib-small'       }
keys.cq    = { m_editing.block_comment                }
keys.cl    = { m_editing.goto_line                    }
keys.ck    = { m_editing.smart_cutcopy,               }
keys.csk   = { m_editing.smart_cutcopy, 'copy'        }
keys.cu    = { m_editing.smart_paste,                 }
keys.au    = { m_editing.smart_paste, 'cycle'         }
keys.sau   = { m_editing.smart_paste, 'reverse'       }
keys.cw    = { m_editing.current_word, 'delete'       }
keys.at    = { m_editing.transpose_chars              }
keys.csh   = { m_editing.squeeze,                     }
keys.cj    = { m_editing.join_lines                   }
keys.cau   = { m_editing.move_line, 'up'              }
keys.cad   = { m_editing.move_line, 'down'            }
keys.csai  = { m_editing.convert_indentation          }
keys.cae   = { -- code execution
  r = { m_editing.ruby_exec },
  l = { m_editing.lua_exec  }
}
keys.ae = { -- enclose in...
  t      = { m_editing.enclose, 'tag'        },
  st     = { m_editing.enclose, 'single_tag' },
  ['s"'] = { m_editing.enclose, 'dbl_quotes' },
  ["'"]  = { m_editing.enclose, 'sng_quotes' },
  ['(']  = { m_editing.enclose, 'parens'     },
  ['[']  = { m_editing.enclose, 'brackets'   },
  ['{']  = { m_editing.enclose, 'braces'     },
  c      = { m_editing.enclose, 'chars'      },
}
keys.as = { -- select in...
  e      = { m_editing.select_enclosed               },
  t      = { m_editing.select_enclosed, 'tags'       },
  ['s"'] = { m_editing.select_enclosed, 'dbl_quotes' },
  ["'"]  = { m_editing.select_enclosed, 'sng_quotes' },
  ['(']  = { m_editing.select_enclosed, 'parens'     },
  ['[']  = { m_editing.select_enclosed, 'brackets'   },
  ['{']  = { m_editing.select_enclosed, 'braces'     },
  w      = { m_editing.current_word,    'select'     },
  l      = { m_editing.select_line                   },
  p      = { m_editing.select_paragraph              },
  i      = { m_editing.select_indented_block         },
  s      = { m_editing.select_scope                  },
  g      = { m_editing.grow_selection, 1             },
  a      = { 'select_all', b                         },
}

-- Multiple lines commands.
local m_mlines = _m.textadept.mlines
keys.am = {
  a  = { m_mlines.add             },
  sa = { m_mlines.add_multiple    },
  r  = { m_mlines.remove          },
  sr = { m_mlines.remove_multiple },
  u  = { m_mlines.update          },
  c  = { m_mlines.clear           },
}

-- Macro commands.
local m_macro = _m.textadept.macros
keys.cam  = { m_macro.toggle_record }
keys.csam = { m_macro.play          }

-- Project manager commands.
local function pm_activate(text) t.pm.entry_text = text t.pm.activate() end
keys['c\t'] = { t.pm.focus             }
keys.ct.b   = { pm_activate, 'buffers' }
keys.ct.c   = { pm_activate, 'ctags'   }
keys.ct.m   = { pm_activate, 'macros'  }
keys.ct.v.p = { t.pm.toggle_visible    }

-- Toggle setting commands.
local function toggle_setting(setting)
  local state = buffer[setting]
  if type(state) == 'boolean' then
    buffer[setting] = not state
  elseif type(state) == 'number' then
    buffer[setting] = buffer[setting] == 0 and 1 or 0
  end
  t.events.update_ui() -- for updating statusbar
end
keys.ct.v.e = { toggle_setting, 'view_eol'           }
keys.ct.v.r = { toggle_setting, 'wrap_mode'          }
keys.ct.v.i = { toggle_setting, 'indentation_guides' }
keys.ct.v.t = { toggle_setting, 'use_tabs'           }
keys.ct.v.w = { toggle_setting, 'view_ws'            }

-- Miscellaneous commands.
keys.cc = { t.command_entry.focus }
local m_events = t.events
keys.cab  = { m_events.handle, 'call_tip_click', 1 }
keys.caf  = { m_events.handle, 'call_tip_click', 2 }
keys.ct.f = { function()
  local buffer = buffer
  buffer:toggle_fold( buffer:line_from_position(buffer.current_pos) )
end }
keys.f5 = { 'colourise', b, 0, -1 }