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ncplane_resize: factor out ncplane_resize_internal_check()

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nick black 2024-03-24 23:51:00 -04:00
parent 503e9fb3c5
commit 34b6cc12ec
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1 changed files with 32 additions and 18 deletions
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src/lib/notcurses.c
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@ -822,43 +822,59 @@ int resize_callbacks_children(ncplane* n){
return ret;
}
// can be used on stdplane, unlike ncplane_resize() which prohibits it.
int ncplane_resize_internal(ncplane* n, int keepy, int keepx,
unsigned keepleny, unsigned keeplenx,
int yoff, int xoff,
unsigned ylen, unsigned xlen){
// basic consistency checks on resize requests
static int
ncplane_resize_internal_check(const ncplane* n, int keepy, int keepx,
unsigned keepleny, unsigned keeplenx,
int yoff, int xoff, unsigned ylen, unsigned xlen,
unsigned* rows, unsigned* cols){
if(keepy < 0 || keepx < 0){ // can't start at negative origin
logerror("can't retain negative offset %dx%d", keepy, keepx);
return -1;
}
if((!keepleny && keeplenx) || (keepleny && !keeplenx)){ // both must be 0
logerror("can't retain null dimension %dx%d", keepleny, keeplenx);
logerror("can't retain null dimension %ux%u", keepleny, keeplenx);
return -1;
}
// can't be smaller than keep length
if(ylen < keepleny){
logerror("can't map in y dimension: %u < %d", ylen, keepleny);
logerror("can't map in y dimension: %u < %u", ylen, keepleny);
return -1;
}
if(xlen < keeplenx){
logerror("can't map in x dimension: %u < %d", xlen, keeplenx);
logerror("can't map in x dimension: %u < %u", xlen, keeplenx);
return -1;
}
if(ylen <= 0 || xlen <= 0){ // can't resize to trivial or negative size
logerror("can't achieve meaningless size %ux%u", ylen, xlen);
return -1;
}
ncplane_dim_yx(n, rows, cols);
if(keepleny + keepy > *rows){
logerror("can't keep %u@%d rows from %u", keepleny, keepy, *rows);
return -1;
}
if(keeplenx + keepx > *cols){
logerror("can't keep %u@%d cols from %u", keeplenx, keepx, *cols);
return -1;
}
loginfo("%ux%u @ %d/%d → %u/%u @ %d/%d (want %ux%u@%d/%d)", *rows, *cols,
n->absy, n->absx, ylen, xlen, n->absy + keepy + yoff, n->absx + keepx + xoff,
keepleny, keeplenx, keepy, keepx);
return 0;
}
// can be used on stdplane, unlike ncplane_resize() which prohibits it.
int ncplane_resize_internal(ncplane* n, int keepy, int keepx,
unsigned keepleny, unsigned keeplenx,
int yoff, int xoff,
unsigned ylen, unsigned xlen){
unsigned rows, cols;
ncplane_dim_yx(n, &rows, &cols);
if(keepleny + keepy > rows){
logerror("can't keep %d@%d rows from %d", keepleny, keepy, rows);
if(ncplane_resize_internal_check(n, keepy, keepx, keepleny, keeplenx,
yoff, xoff, ylen, xlen,
&rows, &cols)){
return -1;
}
if(keeplenx + keepx > cols){
logerror("can't keep %d@%d cols from %d", keeplenx, keepx, cols);
return -1;
}
loginfo("%dx%d @ %d/%d → %u/%u @ %d/%d (want %ux%u@%d/%d)", rows, cols, n->absy, n->absx, ylen, xlen, n->absy + keepy + yoff, n->absx + keepx + xoff, keepleny, keeplenx, keepy, keepx);
if(n->absy == n->absy + keepy && n->absx == n->absx + keepx &&
rows == ylen && cols == xlen){
return 0;
@ -2697,7 +2713,6 @@ int ncplane_resize_placewithin(ncplane* n){
if(ncplane_move_rel(n, -absy, 0)){
ret = -1;
}
absy = ncplane_abs_y(n);
}
if(absx < 0){
logdebug("moving right %d", -absx);
@ -2705,7 +2720,6 @@ int ncplane_resize_placewithin(ncplane* n){
if(ncplane_move_rel(n, 0, -absx)){
ret = -1;
}
absx = ncplane_abs_x(n);
}
return ret;
}