/* inserts a character at the cursor */
void insertc(view_t *view,unsigned char c) {
/* check readonly */
if(view->buffer->readonly)
error_throw(ERR_READONLY);
/* check valid character */
if((char)c<0) return;
char *line=view->buffer->lines[view->cursor_line];
/* make sure the line is long enough */
view->buffer->lines[view->cursor_line]=strexpand(line,strlen(line)+2);
line=view->buffer->lines[view->cursor_line];
/* make a copy of the line */
char *tln=malloc(strlen(line)+2);
char *ln=tln;
sprintf(ln,"%s",line);
/* put the line back together */
/* copy the first part back */
line[0]='\0';
strncat(line,ln,view->cursor_x);
/* copy the character */
line[strlen(line)+1]='\0';
line[strlen(line)]=c;
/* copy the second part back */
ln+=view->cursor_x;
strcat(line,ln);
free(tln); /* free temporary buffer */
/* advance the cursor */
view->pref_x++;
clean_cursor_x(view);
/* we've been modified */
view->buffer->modified=1;
}
/* inserts a line break at the cursor */
void insertlb(view_t *view) {
buffer_t *b=view->buffer;
if(b->readonly)
error_throw(ERR_READONLY);
/* enlarge the line count */
b->line_count++;
/* allocate more space */
b->lines=realloc(b->lines,sizeof(char *)*b->line_count);
int nln=view->cursor_line; /* the number of the new line -1 */
/* copy lines down */
int l;
for(l=b->line_count-2;l>=nln;l--)
b->lines[l+1]=b->lines[l];
/* create the new line */
b->lines[nln]=malloc(view->cursor_x+2);
b->lines[nln][0]='\0';
/* copy the first part into the new line*/
strncat(b->lines[nln],b->lines[nln+1],view->cursor_x);
/* copy the second part out of the next line */
char *sp=malloc(strsize(b->lines[nln+1]+view->cursor_x));
sp[0]='\0';
strcat(sp,b->lines[nln+1]+view->cursor_x);
free(b->lines[nln+1]); /* free old stuff */
b->lines[nln+1]=sp; /* use new stuff */
view->pref_x=0; /* we're at the beginning of the line */
/* move the cursor down */
cursor_down(view);
/* we've been modified */
b->modified=1;
}
/* goto the given line in the given view */
void goto_line(view_t *view,int lno) {
if(lno<=0)
error_throw(ERR_BADINPUT);
/* set the cursor line and refresh */
view->cursor_line=lno-1;
/* move the screen */
while(view->topline>lno-1)
view->topline--;
while(view->cursor_line-view->topline>=view->height)
view->topline++;
/* clean the cursor X coordinate */
clean_cursor_x(view);
}
int error_print(char *msg)
{
PUTERROR(msg);
return (error_throw(FAIL));
}