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win32.c: clear relative to screen

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* win32/win32.c (constat_apply): clear visible screen only, not
  the entire buffer.  [ruby-core:81883] [Bug #13707]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59255 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-07-03 10:56:21 +00:00
parent 2c4d43082c
commit 66245e1b2b
1 changed files with 36 additions and 12 deletions
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48
win32/win32.c
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@ -6680,6 +6680,16 @@ constat_attr(int count, const int *seq, WORD attr, WORD default_attr, int *rever
return attr;
}
/* License: Ruby's */
static void
constat_clear(HANDLE handle, WORD attr, DWORD len, COORD pos)
{
DWORD written;
FillConsoleOutputAttribute(handle, attr, len, pos, &written);
FillConsoleOutputCharacterW(handle, L' ', len, pos, &written);
}
/* License: Ruby's */
static void
constat_apply(HANDLE handle, struct constat *s, WCHAR w)
@ -6689,7 +6699,6 @@ constat_apply(HANDLE handle, struct constat *s, WCHAR w)
int count = s->vt100.state;
int arg1 = 1;
COORD pos;
DWORD written;
if (!GetConsoleScreenBufferInfo(handle, &csbi)) return;
if (count > 0 && seq[0] > 0) arg1 = seq[0];
@ -6747,38 +6756,53 @@ constat_apply(HANDLE handle, struct constat *s, WCHAR w)
case L'J':
switch (arg1) {
case 0: /* erase after cursor */
FillConsoleOutputCharacterW(handle, L' ',
csbi.dwSize.X * (csbi.dwSize.Y - csbi.dwCursorPosition.Y) - csbi.dwCursorPosition.X,
csbi.dwCursorPosition, &written);
constat_clear(handle, csbi.wAttributes,
(csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.dwCursorPosition.Y + 1)
- csbi.dwCursorPosition.X),
csbi.dwCursorPosition);
break;
case 1: /* erase before cursor */
pos.X = 0;
pos.Y = csbi.dwCursorPosition.Y;
FillConsoleOutputCharacterW(handle, L' ',
csbi.dwSize.X * csbi.dwCursorPosition.Y + csbi.dwCursorPosition.X,
pos, &written);
pos.Y = csbi.srWindow.Top;
constat_clear(handle, csbi.wAttributes,
(csbi.dwSize.X * (csbi.dwCursorPosition.Y - csbi.srWindow.Top)
+ csbi.dwCursorPosition.X),
pos);
break;
case 2: /* erase entire screen */
pos.X = 0;
pos.Y = csbi.srWindow.Top;
constat_clear(handle, csbi.wAttributes,
(csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1)),
pos);
break;
case 3: /* erase entire screen */
pos.X = 0;
pos.Y = 0;
FillConsoleOutputCharacterW(handle, L' ', csbi.dwSize.X * csbi.dwSize.Y, pos, &written);
constat_clear(handle, csbi.wAttributes,
(csbi.dwSize.X * csbi.dwSize.Y),
pos);
break;
}
break;
case L'K':
switch (arg1) {
case 0: /* erase after cursor */
FillConsoleOutputCharacterW(handle, L' ', csbi.dwSize.X - csbi.dwCursorPosition.X, csbi.dwCursorPosition, &written);
constat_clear(handle, csbi.wAttributes,
(csbi.dwSize.X - csbi.dwCursorPosition.X),
csbi.dwCursorPosition);
break;
case 1: /* erase before cursor */
pos.X = 0;
pos.Y = csbi.dwCursorPosition.Y;
FillConsoleOutputCharacterW(handle, L' ', csbi.dwCursorPosition.X, pos, &written);
constat_clear(handle, csbi.wAttributes,
csbi.dwCursorPosition.X, pos);
break;
case 2: /* erase entire line */
pos.X = 0;
pos.Y = csbi.dwCursorPosition.Y;
FillConsoleOutputCharacterW(handle, L' ', csbi.dwSize.X, pos, &written);
constat_clear(handle, csbi.wAttributes,
csbi.dwSize.X, pos);
break;
}
break;