(*
Copyright 2021 Anton Krotov
This file is part of CEdit.
CEdit is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
CEdit is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with CEdit. If not, see <http://www.gnu.org/licenses/>.
*)
MODULE Clipboard;
IMPORT SYSTEM, K := KOSAPI, E := Encodings, Lines;
CONST
TTEXT = 0;
lenEOL* = 2;
TYPE
tBuffer* = POINTER TO RECORD
dataPtr*: INTEGER;
pos: INTEGER
END;
PROCEDURE free (ptr: INTEGER);
BEGIN
ptr := K.free(ptr)
END free;
PROCEDURE bufSize* (buffer: tBuffer): INTEGER;
RETURN buffer.pos - buffer.dataPtr
END bufSize;
PROCEDURE put* (buffer: tBuffer);
VAR
a, cnt, size: INTEGER;
ptr, pchar: INTEGER;
wch: WCHAR;
BEGIN
cnt := bufSize(buffer) DIV 2;
size := cnt + 12;
a := K.malloc(size);
ASSERT(a # 0);
SYSTEM.PUT32(a, size);
SYSTEM.PUT32(a + 4, TTEXT);
SYSTEM.PUT32(a + 8, 1);
pchar := a + 12;
ptr := buffer.dataPtr;
WHILE cnt > 0 DO
SYSTEM.GET(ptr, wch);
SYSTEM.PUT(pchar, CHR(E.UNI[ORD(wch), E.CP866] MOD 256));
INC(pchar);
INC(ptr, 2);
DEC(cnt)
END;
K.sysfunc2(54, 3);
K.sysfunc4(54, 2, size, a)
END put;
PROCEDURE create* (bufSize: INTEGER): tBuffer;
VAR
res: tBuffer;
BEGIN
NEW(res);
res.dataPtr := K.malloc(bufSize*SYSTEM.SIZE(WCHAR) + 4096);
ASSERT(res.dataPtr # 0);
res.pos := res.dataPtr
RETURN res
END create;
PROCEDURE destroy* (VAR buffer: tBuffer);
BEGIN
IF buffer # NIL THEN
IF buffer.dataPtr # 0 THEN
free(buffer.dataPtr)
END;
DISPOSE(buffer)
END
END destroy;
PROCEDURE append* (buffer: tBuffer; line: Lines.tLine; first, last: INTEGER);
VAR
strSize: INTEGER;
BEGIN
strSize := (last - first + 1)*SYSTEM.SIZE(WCHAR);
IF strSize > 0 THEN
SYSTEM.MOVE(Lines.getPChar(line, first), buffer.pos, strSize);
INC(buffer.pos, strSize)
END
END append;
PROCEDURE appends* (buffer: tBuffer; s: ARRAY OF WCHAR; first, last: INTEGER);
VAR
strSize: INTEGER;
BEGIN
strSize := (last - first + 1)*SYSTEM.SIZE(WCHAR);
IF strSize > 0 THEN
SYSTEM.MOVE(SYSTEM.ADR(s[first]), buffer.pos, strSize);
INC(buffer.pos, strSize)
END
END appends;
PROCEDURE eol* (buffer: tBuffer);
VAR
s: ARRAY 2 OF WCHAR;
BEGIN
s[0] := 0DX; s[1] := 0AX;
appends(buffer, s, 0, 1)
END eol;
PROCEDURE eot* (buffer: tBuffer);
END eot;
PROCEDURE available* (): BOOLEAN;
VAR
ptr: INTEGER;
n, size, typ, x: INTEGER;
res: BOOLEAN;
BEGIN
res := FALSE;
n := K.sysfunc2(54, 0);
IF n > 0 THEN
ptr := K.sysfunc3(54, 1, n - 1);
SYSTEM.GET32(ptr, size);
SYSTEM.GET32(ptr + 4, typ);
SYSTEM.GET(ptr + 8, x);
res := (typ = TTEXT) & (x = 1);
free(ptr)
END
RETURN res
END available;
PROCEDURE get* (VAR cnt: INTEGER): INTEGER;
VAR
ptr: INTEGER;
BEGIN
ptr := 0;
cnt := 0;
IF available() THEN
ptr := K.sysfunc3(54, 1, K.sysfunc2(54, 0) - 1);
SYSTEM.GET32(ptr, cnt);
DEC(cnt, 12);
INC(ptr, 12)
END
RETURN ptr
END get;
END Clipboard.