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mothra: fix nil pointer dereference

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This commit is contained in:
cinap_lenrek 2013-08-09 17:24:48 +02:00
parent 7c25ff0c11
commit 0e8fecdad5
1 changed files with 15 additions and 7 deletions
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20
sys/src/cmd/mothra/libpanel/edit.c
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@ -52,7 +52,6 @@ void pl_drawedit(Panel *p){
char *pl_snarfedit(Panel *p){
int s0, s1;
Rune *t;
t=pleget(p);
plegetsel(p, &s0, &s1);
if(t==0 || s0>=s1)
@ -85,9 +84,9 @@ void pl_pasteedit(Panel *p, char *s){
*/
int pl_hitedit(Panel *p, Mouse *m){
Edit *ep;
if(m->buttons&1){
plgrabkb(p);
ep=p->data;
if(ep->t && m->buttons&1){
plgrabkb(p);
ep->t->b=p->b;
twhilite(ep->t, ep->sel0, ep->sel1, 0);
twselect(ep->t, m);
@ -112,6 +111,7 @@ void pl_scrolledit(Panel *p, int dir, int buttons, int num, int den){
if(dir!=VERT) return;
ep=p->data;
t=ep->t;
if(t==0) return;
t->b=p->b;
switch(buttons){
default:
@ -148,6 +148,7 @@ void pl_typeedit(Panel *p, Rune c){
Panel *sb;
ep=p->data;
t=ep->t;
if(t==0) return;
t->b=p->b;
twhilite(t, ep->sel0, ep->sel1, 0);
switch(c){
@ -208,7 +209,7 @@ void pl_childspaceedit(Panel *g, Point *ul, Point *size){
void pl_freeedit(Panel *p){
Edit *ep;
ep=p->data;
if(ep->t!=nil) twfree(ep->t);
if(ep->t) twfree(ep->t);
ep->t=0;
}
void plinitedit(Panel *v, int flags, Point minsize, Rune *text, int ntext, void (*hit)(Panel *)){
@ -245,7 +246,9 @@ Panel *pledit(Panel *parent, int flags, Point minsize, Rune *text, int ntext, vo
return v;
}
void plescroll(Panel *p, int top){
twscroll(((Edit *)p->data)->t, top);
Textwin *t;
t=((Edit*)p->data)->t;
if(t) twscroll(t, top);
}
void plegetsel(Panel *p, int *sel0, int *sel1){
Edit *ep;
@ -260,11 +263,15 @@ int plelen(Panel *p){
return t->etext-t->text;
}
Rune *pleget(Panel *p){
return ((Edit *)p->data)->t->text;
Textwin *t;
t=((Edit*)p->data)->t;
if(t==0) return 0;
return t->text;
}
void plesel(Panel *p, int sel0, int sel1){
Edit *ep;
ep=p->data;
if(ep->t==0) return;
ep->t->b=p->b;
twhilite(ep->t, ep->sel0, ep->sel1, 0);
ep->sel0=sel0;
@ -274,6 +281,7 @@ void plesel(Panel *p, int sel0, int sel1){
void plepaste(Panel *p, Rune *text, int ntext){
Edit *ep;
ep=p->data;
if(ep->t==0) return;
ep->t->b=p->b;
twhilite(ep->t, ep->sel0, ep->sel1, 0);
twreplace(ep->t, ep->sel0, ep->sel1, text, ntext);