519 lines
22 KiB
Standard ML
519 lines
22 KiB
Standard ML
structure NormalMode =
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struct
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(* parsing functions, deciding what to do while we are in normal mode *)
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open AppType
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open InputMsg
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fun switchToNormalSearchMode (app: app_type) =
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NormalSearchFinish.onSearchChanged
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(app, "", Vector.fromList [], 0, #buffer app)
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fun getNumLength (pos, str) =
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if pos = String.size str then
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pos
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else
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let val chr = String.sub (str, pos)
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in if Char.isDigit chr then getNumLength (pos + 1, str) else pos
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end
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fun appendChr (app: app_type, chr, str) =
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let
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val str = str ^ Char.toString chr
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val mode = NORMAL_MODE str
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in
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NormalModeWith.mode (app, mode, [])
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end
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fun parseMoveToChr (count, app, fMove, chrCmd) =
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NormalMove.moveToChr (app, count, fMove, chrCmd)
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fun parseGo (count, app, chrCmd) =
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case chrCmd of
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#"e" => MoveToEndOfPrevWord.move (app, count)
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| #"E" => MoveToEndOfPrevWORD.move (app, count)
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| #"g" => NormalMove.moveToStart app
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| _ => NormalFinish.clearMode app
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fun parseChr (app: app_type, count, chr, str, time) =
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case chr of
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#"h" => MoveViH.move (app, count)
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| #"j" => MoveViJ.move (app, count)
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| #"k" => MoveViK.move (app, count)
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| #"l" => MoveViL.move (app, count)
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| #"w" => MoveToNextWord.move (app, count)
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| #"W" => MoveToNextWORD.move (app, count)
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| #"b" => MoveToPrevWord.move (app, count)
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| #"B" => MoveToPrevWORD.move (app, count)
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| #"e" => MoveToEndOfWord.move (app, count)
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| #"E" => MoveToEndOfWORD.move (app, count)
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| #"n" => NormalMove.moveToNextMatch (app, count)
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| #"N" => NormalMove.moveToPrevMatch (app, count)
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| #"z" => NormalFinish.centreToCursor app
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(* can only move to start or end of line once
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* so hardcode count as 1 *)
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| #"0" =>
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(* 0 is a bit of a special case.
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* If 0 is pressed without any preceding characters,
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* then it should move cursor to the start of the line.
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* However, if a number was pressed previously before 0 was,
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* then this means user is entering a count.
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* In that case, we append 0 to the string. *)
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if String.size str > 0 then
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let
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val lastChr = String.sub (str, String.size str - 1)
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in
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if Char.isDigit lastChr then
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let
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val chr = Char.toString chr
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val str = str ^ chr
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val mode = NORMAL_MODE str
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in
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NormalModeWith.mode (app, mode, [])
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end
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else
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MoveToStartOfLine.move (app, 1)
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end
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else
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MoveToStartOfLine.move (app, 1)
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| #"$" => MoveToEndOfLine.move (app, 1)
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| #"^" => NormalMove.firstNonSpaceChr app
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| #"G" =>
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(* if str has a size larger than 0,
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* interpret as "go to line" command;
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* else, interpret as a command to move to end *)
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if String.size str = 0 then NormalMove.moveToEnd app
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else NormalMove.moveToLine (app, count - 1)
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| #"%" => NormalMove.moveToMatchingPair app
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| #"x" => NormalDelete.removeChr (app, count, time)
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| #"J" => NormalDelete.removeLineBreaks (app, count, time)
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| #"/" => switchToNormalSearchMode app
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(* multi-char commands which can be appended *)
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| #"t" => appendChr (app, chr, str)
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| #"T" => appendChr (app, chr, str)
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| #"y" => appendChr (app, chr, str)
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| #"d" => appendChr (app, chr, str)
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| #"f" => appendChr (app, chr, str)
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| #"F" => appendChr (app, chr, str)
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| #"g" => appendChr (app, chr, str)
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| #"c" => appendChr (app, chr, str)
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| _ =>
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(* user may be entering a cmd with more than one chr
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* such as "2dw" to delete two word
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* so add current chr to mode, and save it in the app state *)
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let
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val str = if Char.isDigit chr then str ^ Char.toString chr else ""
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val mode = NORMAL_MODE str
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in
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NormalModeWith.mode (app, mode, [])
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end
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structure ParseDelete =
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struct
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fun parseDeleteInside (app, chr, time) =
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case chr of
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#"w" => NormalDelete.deleteInsideWord (app, time)
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| #"W" => NormalDelete.deleteInsideWORD (app, time)
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| #"(" => NormalDelete.deleteInsideChrOpen (app, chr, time)
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| #"[" => NormalDelete.deleteInsideChrOpen (app, chr, time)
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| #"{" => NormalDelete.deleteInsideChrOpen (app, chr, time)
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| #"<" => NormalDelete.deleteInsideChrOpen (app, chr, time)
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| #")" => NormalDelete.deleteInsideChrClose (app, chr, time)
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| #"]" => NormalDelete.deleteInsideChrClose (app, chr, time)
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| #"}" => NormalDelete.deleteInsideChrClose (app, chr, time)
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| #">" => NormalDelete.deleteInsideChrClose (app, chr, time)
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| _ => NormalFinish.clearMode app
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fun parseDeleteAround (app, chr, time) =
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case chr of
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#"(" => NormalDelete.deleteAroundChrOpen (app, chr, time)
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| #"[" => NormalDelete.deleteAroundChrOpen (app, chr, time)
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| #"{" => NormalDelete.deleteAroundChrOpen (app, chr, time)
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| #"<" => NormalDelete.deleteAroundChrOpen (app, chr, time)
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| #")" => NormalDelete.deleteAroundChrClose (app, chr, time)
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| #"]" => NormalDelete.deleteAroundChrClose (app, chr, time)
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| #"}" => NormalDelete.deleteAroundChrClose (app, chr, time)
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| #">" => NormalDelete.deleteAroundChrClose (app, chr, time)
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| _ => NormalFinish.clearMode app
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fun parseDeleteTerminal (str, count, app, chrCmd, time) =
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case chrCmd of
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(* terminal commands: require no input after *)
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#"h" => NormalDelete.delete (app, count, Cursor.viH, time)
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| #"l" => NormalDelete.delete (app, count, Cursor.viL, time)
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(* vi's 'j' and 'k' commands move up or down a column
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* but 'dj' or 'dk' delete whole lines
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* so their implementation differs from
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* other cursor motions *)
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| #"j" => NormalDelete.deleteLine (app, count + 1, time)
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| #"k" => NormalDelete.deleteLineBack (app, count, time)
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| #"w" => NormalDelete.deleteByDfa (app, count, Cursor.nextWord, time)
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| #"W" => NormalDelete.deleteByDfa (app, count, Cursor.nextWORD, time)
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| #"b" => NormalDelete.deleteByDfa (app, count, Cursor.prevWord, time)
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| #"B" => NormalDelete.deleteByDfa (app, count, Cursor.prevWORD, time)
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| #"e" =>
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NormalDelete.deleteByDfa (app, count, Cursor.endOfWordForDelete, time)
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| #"E" =>
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NormalDelete.deleteByDfa (app, count, Cursor.endOfWORDForDelete, time)
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| #"0" => NormalDelete.delete (app, 1, Cursor.vi0, time)
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| #"$" => NormalDelete.deleteToEndOfLine (app, time)
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| #"^" => NormalDelete.deleteToFirstNonSpaceChr (app, time)
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| #"d" => NormalDelete.deleteLine (app, count, time)
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| #"n" => NormalDelete.deleteToNextMatch (app, count, time)
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| #"N" => NormalDelete.deleteToPrevMatch (app, count, time)
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| #"%" => NormalDelete.deletePair (app, time)
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(* non-terminal commands which require appending chr *)
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| #"t" => appendChr (app, chrCmd, str)
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| #"T" => appendChr (app, chrCmd, str)
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| #"f" => appendChr (app, chrCmd, str)
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| #"F" => appendChr (app, chrCmd, str)
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| #"g" => appendChr (app, chrCmd, str)
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| #"i" => appendChr (app, chrCmd, str)
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| #"a" => appendChr (app, chrCmd, str)
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(* invalid command: reset mode *)
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| _ => NormalFinish.clearMode app
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fun parseDeleteGo (app, count, chrCmd, time) =
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case chrCmd of
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#"e" => NormalDelete.deleteToEndOfPrevWord (app, count, time)
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| #"E" => NormalDelete.deleteToEndOfPrevWORD (app, count, time)
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| #"g" => NormalDelete.deleteToStart (app, time)
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| _ => NormalFinish.clearMode app
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fun parseDelete (strPos, str, count, app, chrCmd, time) =
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if strPos = String.size str - 1 then
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parseDeleteTerminal (str, count, app, chrCmd, time)
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else
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(* have to continue parsing string *)
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case String.sub (str, strPos + 1) of
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#"t" =>
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NormalDelete.deleteToChr
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(app, 1, Cursor.tillNextChr, op+, chrCmd, time)
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| #"T" =>
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NormalDelete.deleteToChr
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(app, 1, Cursor.tillPrevChr, op-, chrCmd, time)
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| #"f" =>
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NormalDelete.deleteToChr
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(app, count, Cursor.toNextChr, op+, chrCmd, time)
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| #"F" =>
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NormalDelete.deleteToChr
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(app, count, Cursor.toPrevChr, op-, chrCmd, time)
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| #"g" => parseDeleteGo (app, count, chrCmd, time)
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| #"i" => parseDeleteInside (app, chrCmd, time)
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| #"a" => parseDeleteAround (app, chrCmd, time)
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| _ => NormalFinish.clearMode app
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end
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structure ParseYankDelete =
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struct
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fun parseDeleteInside (app, chr, time) =
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case chr of
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#"w" => NormalYankDelete.deleteInsideWord (app, time)
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| #"W" => NormalYankDelete.deleteInsideWORD (app, time)
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| #"(" => NormalYankDelete.deleteInsideChrOpen (app, chr, time)
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| #"[" => NormalYankDelete.deleteInsideChrOpen (app, chr, time)
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| #"{" => NormalYankDelete.deleteInsideChrOpen (app, chr, time)
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| #"<" => NormalYankDelete.deleteInsideChrOpen (app, chr, time)
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| #")" => NormalYankDelete.deleteInsideChrClose (app, chr, time)
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| #"]" => NormalYankDelete.deleteInsideChrClose (app, chr, time)
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| #"}" => NormalYankDelete.deleteInsideChrClose (app, chr, time)
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| #">" => NormalYankDelete.deleteInsideChrClose (app, chr, time)
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| _ => NormalFinish.clearMode app
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fun parseDeleteAround (app, chr, time) =
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case chr of
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#"(" => NormalYankDelete.deleteAroundChrOpen (app, chr, time)
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| #"[" => NormalYankDelete.deleteAroundChrOpen (app, chr, time)
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| #"{" => NormalYankDelete.deleteAroundChrOpen (app, chr, time)
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| #"<" => NormalYankDelete.deleteAroundChrOpen (app, chr, time)
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| #")" => NormalYankDelete.deleteAroundChrClose (app, chr, time)
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| #"]" => NormalYankDelete.deleteAroundChrClose (app, chr, time)
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| #"}" => NormalYankDelete.deleteAroundChrClose (app, chr, time)
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| #">" => NormalYankDelete.deleteAroundChrClose (app, chr, time)
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| _ => NormalFinish.clearMode app
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fun parseDeleteTerminal (str, count, app, chrCmd, time) =
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case chrCmd of
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(* terminal commands: require no input after *)
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#"h" => NormalYankDelete.delete (app, count, Cursor.viH, time)
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| #"l" => NormalYankDelete.delete (app, count, Cursor.viL, time)
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(* vi's 'j' and 'k' commands move up or down a column
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* but 'dj' or 'dk' delete whole lines
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* so their implementation differs from
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* other cursor motions *)
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| #"j" => NormalYankDelete.deleteLine (app, count + 1, time)
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| #"k" => NormalYankDelete.deleteLineBack (app, count, time)
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| #"w" => NormalYankDelete.deleteByDfa (app, count, Cursor.nextWord, time)
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| #"W" => NormalYankDelete.deleteByDfa (app, count, Cursor.nextWORD, time)
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| #"b" => NormalYankDelete.deleteByDfa (app, count, Cursor.prevWord, time)
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| #"B" => NormalYankDelete.deleteByDfa (app, count, Cursor.prevWORD, time)
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| #"e" =>
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NormalYankDelete.deleteByDfa
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(app, count, Cursor.endOfWordForDelete, time)
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| #"E" =>
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NormalYankDelete.deleteByDfa
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(app, count, Cursor.endOfWORDForDelete, time)
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| #"0" => NormalYankDelete.delete (app, 1, Cursor.vi0, time)
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| #"$" => NormalYankDelete.deleteToEndOfLine (app, time)
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| #"^" => NormalYankDelete.deleteToFirstNonSpaceChr (app, time)
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| #"d" => NormalYankDelete.deleteLine (app, count, time)
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| #"n" => NormalYankDelete.deleteToNextMatch (app, count, time)
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| #"N" => NormalYankDelete.deleteToPrevMatch (app, count, time)
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| #"%" => NormalYankDelete.deletePair (app, time)
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(* non-terminal commands which require appending chr *)
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| #"t" => appendChr (app, chrCmd, str)
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| #"T" => appendChr (app, chrCmd, str)
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| #"f" => appendChr (app, chrCmd, str)
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| #"F" => appendChr (app, chrCmd, str)
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| #"g" => appendChr (app, chrCmd, str)
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| #"i" => appendChr (app, chrCmd, str)
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| #"a" => appendChr (app, chrCmd, str)
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(* invalid command: reset mode *)
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| _ => NormalFinish.clearMode app
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fun parseDeleteGo (app, count, chrCmd, time) =
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case chrCmd of
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#"e" => NormalYankDelete.deleteToEndOfPrevWord (app, count, time)
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| #"E" => NormalYankDelete.deleteToEndOfPrevWORD (app, count, time)
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| #"g" => NormalYankDelete.deleteToStart (app, time)
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| _ => NormalFinish.clearMode app
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fun parseDelete (strPos, str, count, app, chrCmd, time) =
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if strPos = String.size str - 1 then
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parseDeleteTerminal (str, count, app, chrCmd, time)
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else
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(* have to continue parsing string *)
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case String.sub (str, strPos + 1) of
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#"t" =>
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NormalYankDelete.deleteToChr
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(app, 1, Cursor.tillNextChr, op+, chrCmd, time)
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| #"T" =>
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NormalYankDelete.deleteToChr
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(app, 1, Cursor.tillPrevChr, op-, chrCmd, time)
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| #"f" =>
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NormalYankDelete.deleteToChr
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(app, count, Cursor.toNextChr, op+, chrCmd, time)
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| #"F" =>
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NormalYankDelete.deleteToChr
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(app, count, Cursor.toPrevChr, op-, chrCmd, time)
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| #"g" => parseDeleteGo (app, count, chrCmd, time)
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| #"i" => parseDeleteInside (app, chrCmd, time)
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| #"a" => parseDeleteAround (app, chrCmd, time)
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| _ => NormalFinish.clearMode app
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end
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structure ParseYank =
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struct
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fun yankWhenMovingBack (app: app_type, fMove, count) =
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let
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open DrawMsg
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open MailboxType
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val {buffer, cursorIdx, ...} = app
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val buffer = LineGap.goToIdx (cursorIdx, buffer)
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val low = fMove (buffer, cursorIdx, count)
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val length = cursorIdx - low
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val str = LineGap.substring (low, length, buffer)
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val msg = YANK str
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val mode = NORMAL_MODE ""
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in
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NormalModeWith.modeAndBuffer (app, buffer, mode, [DRAW msg])
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end
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fun yankWhenMovingForward (app: app_type, fMove, count) =
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let
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open DrawMsg
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open MailboxType
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val {buffer, cursorIdx, ...} = app
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val buffer = LineGap.goToIdx (cursorIdx, buffer)
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val high = fMove (buffer, cursorIdx, count)
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val buffer = LineGap.goToIdx (high, buffer)
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val length = high - cursorIdx
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val str = LineGap.substring (cursorIdx, length, buffer)
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val msg = YANK str
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val mode = NORMAL_MODE ""
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in
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NormalModeWith.modeAndBuffer (app, buffer, mode, [DRAW msg])
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end
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fun parseYankTerminal (str, count, app, chrCmd, time) =
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case chrCmd of
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(* motions like yh / yj / yk / yl are not really needed.
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* Vim supports them, but I never use them.
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* I also don't need yx (yank a character and then remove it)
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* because I never do that. *)
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#"y" => NormalYank.yankLine (app, count)
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| #"0" => NormalYank.yankToStartOfLine app
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| #"w" => NormalYank.yankWhenMovingForward (app, Cursor.nextWord, count)
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| #"W" => NormalYank.yankWhenMovingForward (app, Cursor.nextWORD, count)
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| #"b" => NormalYank.yankWhenMovingBack (app, Cursor.prevWord, count)
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| #"B" => NormalYank.yankWhenMovingBack (app, Cursor.prevWORD, count)
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| #"e" =>
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NormalYank.yankWhenMovingForward
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(app, Cursor.endOfWordForDelete, count)
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| #"E" =>
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NormalYank.yankWhenMovingForward
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(app, Cursor.endOfWORDForDelete, count)
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| #"$" => NormalYank.yankWhenMovingForward (app, Cursor.viDlr, 1)
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| #"^" => NormalYank.yankToFirstNonSpaceChr app
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| #"G" => NormalYank.yankToEndOfText app
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| #"%" => NormalYank.yankToMatchingPair app
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| #"n" => NormalYank.yankToNextMatch (app, count)
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| #"N" => NormalYank.yankToPrevMatch (app, count)
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(* append non-terminal characters to string *)
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| #"d" =>
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let (* 'yd' motion, like 'ydw'; meant to be 'yank then delete' *)
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in appendChr (app, chrCmd, str)
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end
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| #"t" => appendChr (app, chrCmd, str)
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| #"T" => appendChr (app, chrCmd, str)
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| #"f" => appendChr (app, chrCmd, str)
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| #"F" => appendChr (app, chrCmd, str)
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| #"g" => appendChr (app, chrCmd, str)
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| #"i" => appendChr (app, chrCmd, str)
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| #"a" => appendChr (app, chrCmd, str)
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| _ => NormalFinish.clearMode app
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fun parseYankGo (count, app, chrCmd) =
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case chrCmd of
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#"e" =>
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NormalYank.yankWhenMovingBackPlusOne
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(app, Cursor.endOfPrevWord, count)
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| #"E" =>
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NormalYank.yankWhenMovingBackPlusOne
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(app, Cursor.endOfPrevWORD, count)
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| #"g" => NormalYank.yankToStart app
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| _ => NormalFinish.clearMode app
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fun parseYankInside (app, chr) =
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case chr of
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#"w" => NormalYank.yankInsideWord app
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| #"W" => NormalYank.yankInsideWORD app
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| #"(" => NormalYank.yankInsideChrOpen (app, chr)
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| #"[" => NormalYank.yankInsideChrOpen (app, chr)
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| #"{" => NormalYank.yankInsideChrOpen (app, chr)
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| #"<" => NormalYank.yankInsideChrOpen (app, chr)
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| #")" => NormalYank.yankInsideChrClose (app, chr)
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| #"]" => NormalYank.yankInsideChrClose (app, chr)
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| #"}" => NormalYank.yankInsideChrClose (app, chr)
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| #">" => NormalYank.yankInsideChrClose (app, chr)
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| _ => NormalFinish.clearMode app
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fun parseYankAround (app, chr) =
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case chr of
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#"(" => NormalYank.yankAroundChrOpen (app, chr)
|
|
| #"[" => NormalYank.yankAroundChrOpen (app, chr)
|
|
| #"{" => NormalYank.yankAroundChrOpen (app, chr)
|
|
| #"<" => NormalYank.yankAroundChrOpen (app, chr)
|
|
| #")" => NormalYank.yankAroundChrClose (app, chr)
|
|
| #"]" => NormalYank.yankAroundChrClose (app, chr)
|
|
| #"}" => NormalYank.yankAroundChrClose (app, chr)
|
|
| #">" => NormalYank.yankAroundChrClose (app, chr)
|
|
| _ => NormalFinish.clearMode app
|
|
|
|
fun parseYank (strPos, str, count, app, chrCmd, time) =
|
|
if strPos = String.size str - 1 then
|
|
parseYankTerminal (str, count, app, chrCmd, time)
|
|
else
|
|
case String.sub (str, strPos + 1) of
|
|
#"t" => NormalYank.yankToChr (app, 1, Cursor.tillNextChr, op+, chrCmd)
|
|
| #"T" => NormalYank.yankToChr (app, 1, Cursor.tillPrevChr, op-, chrCmd)
|
|
| #"f" =>
|
|
NormalYank.yankToChr (app, count, Cursor.toNextChr, op+, chrCmd)
|
|
| #"F" =>
|
|
NormalYank.yankToChr (app, count, Cursor.toPrevChr, op-, chrCmd)
|
|
| #"g" => parseYankGo (count, app, chrCmd)
|
|
| #"i" => parseYankInside (app, chrCmd)
|
|
| #"a" => parseYankAround (app, chrCmd)
|
|
| #"d" =>
|
|
ParseYankDelete.parseDelete
|
|
(strPos + 1, str, count, app, chrCmd, time)
|
|
| _ => NormalFinish.clearMode app
|
|
end
|
|
|
|
(* useful reference as list of non-terminal commands *)
|
|
fun parseAfterCount (strPos, str, count, app, chrCmd, time) =
|
|
(* we are trying to parse multi-char but non-terminal strings here.
|
|
* For example, we don't want to parse 3w which is a terminal commmand
|
|
* to go 3 words forwards
|
|
* but we do want to parse 3d which is a non-terminal command
|
|
* which can be made terminal by adding "w" or "e" at the end.
|
|
* *)
|
|
case String.sub (str, strPos) of
|
|
#"t" =>
|
|
(* to just before char, forward
|
|
* tillNextChr with count of 1 has same effect
|
|
* as tillNextChr with any count above 1
|
|
* so just hardcode 1 *)
|
|
parseMoveToChr (1, app, Cursor.tillNextChr, chrCmd)
|
|
| #"T" =>
|
|
(* to just before chr, backward *)
|
|
parseMoveToChr (1, app, Cursor.tillPrevChr, chrCmd)
|
|
| #"y" => ParseYank.parseYank (strPos, str, count, app, chrCmd, time)
|
|
| #"d" => ParseDelete.parseDelete (strPos, str, count, app, chrCmd, time)
|
|
| #"f" =>
|
|
(* to chr, forward *)
|
|
parseMoveToChr (count, app, Cursor.toNextChr, chrCmd)
|
|
| #"F" =>
|
|
(* to chr, backward *)
|
|
parseMoveToChr (count, app, Cursor.toPrevChr, chrCmd)
|
|
| #"g" => (* go *) parseGo (count, app, chrCmd)
|
|
| #"c" => (* change *) NormalFinish.clearMode app
|
|
| _ =>
|
|
(* isn't a non-terminal cmd
|
|
* this case should never happen*)
|
|
NormalFinish.clearMode app
|
|
|
|
fun parseNormalModeCommand (app, str, chrCmd, time) =
|
|
if String.size str = 0 then
|
|
parseChr (app, 1, chrCmd, str, time)
|
|
else if String.size str = 1 then
|
|
case Int.fromString str of
|
|
SOME count => parseChr (app, count, chrCmd, str, time)
|
|
| NONE => parseAfterCount (0, str, 1, app, chrCmd, time)
|
|
else
|
|
let
|
|
val numLength = getNumLength (0, str)
|
|
val count = String.substring (str, 0, numLength)
|
|
val count =
|
|
case Int.fromString count of
|
|
SOME x => x
|
|
| NONE => 1
|
|
in
|
|
if numLength = String.size str then
|
|
(* reached end of str; str only contained numbers *)
|
|
parseChr (app, count, chrCmd, str, time)
|
|
else
|
|
(* continue parsing. *)
|
|
parseAfterCount (numLength, str, count, app, chrCmd, time)
|
|
end
|
|
|
|
fun update (app, str, msg, time) =
|
|
case msg of
|
|
CHAR_EVENT chrCmd => parseNormalModeCommand (app, str, chrCmd, time)
|
|
| KEY_ESC => NormalFinish.clearMode app
|
|
| RESIZE_EVENT (width, height) =>
|
|
NormalFinish.resizeText (app, width, height)
|
|
| WITH_SEARCH_LIST searchList =>
|
|
NormalFinish.withSearchList (app, searchList)
|
|
|
|
(* Don't need to handle these keys in normal mode.
|
|
* Everything that is possible through them in Vi and Vim
|
|
* is also possible through other keys,
|
|
* and it is better to use those othe keys to encourage
|
|
* staying on the home row. *)
|
|
| KEY_ENTER => NormalFinish.clearMode app
|
|
| KEY_BACKSPACE => NormalFinish.clearMode app
|
|
| ARROW_RIGHT => NormalFinish.clearMode app
|
|
| ARROW_LEFT => NormalFinish.clearMode app
|
|
| ARROW_UP => NormalFinish.clearMode app
|
|
| ARROW_DOWN => NormalFinish.clearMode app
|
|
end
|