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Reject out of range windows for Move and Resize commands. #633

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Merged
merged 1 commit into from
Nov 15, 2021
Merged

Reject out of range windows for Move and Resize commands. #633

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77 changes: 35 additions & 42 deletions fvwm/move_resize.c
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Original file line number Diff line number Diff line change
Expand Up @@ -494,7 +494,7 @@ static void shuffle_win_to_closest(
*pFinalY = cwin.y;
}

static int __get_shift(int val, float factor)
static int get_shift(int val, float factor)
{
int shift;

Expand All @@ -516,6 +516,7 @@ static int GetOnePositionArgument(
float sfactor, int screen_size, int screen_pos, Bool is_x)
{
int final_pos;
int pos_change = 0;
float wfactor;

if (s1 == 0 || *s1 == 0)
Expand Down Expand Up @@ -584,7 +585,7 @@ static int GetOnePositionArgument(
n = ParsePositionArgumentSuffix(
&f, s1, wfactor, sfactor);
s1 += n;
final_pos += __get_shift(val, f);
pos_change += get_shift(val, f);
}
break;
}
Expand Down Expand Up @@ -616,7 +617,16 @@ static int GetOnePositionArgument(
/* parse suffix */
n = ParsePositionArgumentSuffix(&f, s1, wfactor, sfactor);
s1 += n;
final_pos += __get_shift(val, f);
pos_change += get_shift(val, f);
}
final_pos += pos_change;
if (final_pos > 32767 || final_pos < -32768)
{
fvwm_debug(
__func__, "new position is out of range: %d",
final_pos);

return 0;
}
*pFinalPos = final_pos;

Expand Down Expand Up @@ -792,7 +802,8 @@ static int ParseOneResizeArgument(
int val;
int add_base_size = 0;
int cch = strlen(arg);
int tmp_size;
int size_change;
int new_size;

if (cch == 0)
{
Expand Down Expand Up @@ -833,59 +844,40 @@ static int ParseOneResizeArgument(
if (strcmp(arg,"w") == 0)
{
/* do not change size */
size_change = 0;
}
else if (sscanf(arg,"w-%d",&val) == 1)
{
tmp_size = (int)(val * factor + 0.5);
if (tmp_size < *ret_size)
{
*ret_size -= tmp_size;
}
else
{
*ret_size = 0;
}
size_change = -(int)(val * factor + 0.5);
}
else if (sscanf(arg,"w+%d",&val) == 1 || sscanf(arg,"w%d",&val) == 1)
{
tmp_size = (int)(val * factor + 0.5);
if (-tmp_size < *ret_size)
{
*ret_size += tmp_size;
}
else
{
*ret_size = 0;
}
size_change = (int)(val * factor + 0.5);
}
else if (sscanf(arg,"-%d",&val) == 1)
{
tmp_size = (int)(val * factor + 0.5);
if (tmp_size < scr_size + add_size)
{
*ret_size = scr_size - tmp_size + add_size;
}
else
{
*ret_size = 0;
}
size_change = scr_size - (int)(val * factor + 0.5) + add_size;
}
else if (sscanf(arg,"+%d",&val) == 1 || sscanf(arg,"%d",&val) == 1)
{
tmp_size = (int)(val * factor + 0.5);
if (-tmp_size < add_size + add_base_size)
{
*ret_size = tmp_size + add_size + add_base_size;
}
else
{
*ret_size = 0;
}
size_change =
(int)(val * factor + 0.5) + add_size + add_base_size;
}
else
{
return 0;
}
new_size = *ret_size + size_change;
if (new_size < 0)
{
new_size = 0;
}
else if (new_size > 65535)
{
fvwm_debug(__func__, "new size is too big: %d", new_size);
return 0;
}
*ret_size = new_size;

return 1;
}
Expand Down Expand Up @@ -958,8 +950,9 @@ static int GetResizeArguments(FvwmWindow *fw,
else if (*ret_dir == DIR_NONE)
{
tmp_token = PeekToken(naction, &naction);
if (tmp_token != NULL &&
StrEquals(tmp_token, "automatic"))
if (
tmp_token != NULL && StrEquals(
tmp_token, "automatic"))
{
*detect_automatic_direction = True;
*is_direction_fixed = True;
Expand Down
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