ref: 75c92428225428c8fde2d015f010e608a0b12f1d
dir: /libtk/tmark.c/
#include "lib9.h" #include "draw.h" #include "tk.h" #include "textw.h" #define istring u.string #define iwin u.win #define imark u.mark #define iline u.line static char* tktmarkgravity(Tk*, char*, char**); static char* tktmarknames(Tk*, char*, char**); static char* tktmarknext(Tk*, char*, char**); static char* tktmarkprevious(Tk*, char*, char**); static char* tktmarkset(Tk*, char*, char**); static char* tktmarkunset(Tk*, char*, char**); TkCmdtab tktmarkcmd[] = { "gravity", tktmarkgravity, "names", tktmarknames, "next", tktmarknext, "previous", tktmarkprevious, "set", tktmarkset, "unset", tktmarkunset, nil }; char* tktaddmarkinfo(TkText *tkt, char *name, TkTmarkinfo **ret) { TkTmarkinfo *mi; mi = malloc(sizeof(TkTmarkinfo)); if(mi == nil) return TkNomem; mi->name = strdup(name); if(mi->name == nil) { free(mi); return TkNomem; } mi->gravity = Tkright; mi->cur = nil; mi->next = tkt->marks; tkt->marks = mi; *ret = mi; return nil; } void tktfreemarks(TkTmarkinfo *m) { TkTmarkinfo *n; while(m != nil) { n = m->next; free(m->name); free(m); m = n; } } TkTmarkinfo * tktfindmark(TkTmarkinfo *m, char *name) { while(m != nil) { if(strcmp(m->name, name) == 0) return m; m = m->next; } return nil; } int tktmarkind(Tk *tk, char *name, TkTindex *ans) { TkTmarkinfo *mk; TkText *tkt = TKobj(TkText, tk); if(strcmp(name, "current") == 0) { tktxyind(tk, tkt->current.x, tkt->current.y, ans); return 1; } mk = tktfindmark(tkt->marks, name); if(mk == nil || mk->cur == nil) return 0; ans->item = mk->cur; ans->line = tktitemline(ans->item); ans->pos = 0; return 1; } char* tktmarkparse(Tk *tk, char **parg, TkTmarkinfo **ret) { char *e, *buf; TkText *tkt = TKobj(TkText, tk); buf = mallocz(Tkmaxitem, 0); if(buf == nil) return TkNomem; *parg = tkword(tk->env->top, *parg, buf, buf+Tkmaxitem, nil); if(*buf == '\0') { free(buf); return TkOparg; } *ret = tktfindmark(tkt->marks, buf); if(*ret == nil) { e = tktaddmarkinfo(tkt, buf, ret); if(e != nil) { free(buf); return e; } } free(buf); return nil; } /* * Insert mark before ixnew, first removing it from old place, if any. * Make sure ixnew continues to point after mark. */ char* tktmarkmove(Tk *tk, TkTmarkinfo *m, TkTindex *ixnew) { char *e; int deleted, split; TkTitem *i; TkTindex ix, pix; TkText *tkt = TKobj(TkText, tk); deleted = 0; if(m->cur != nil) { if(m->cur == ixnew->item) return nil; ix.item = m->cur; ix.line = tktitemline(m->cur); ix.pos = 0; tktremitem(tkt, &ix); deleted = 1; } /* XXX - Tad: memory leak on 'i' if something fails later? */ e = tktnewitem(TkTmark, 0, &i); if(e != nil) return e; i->imark = m; m->cur = i; /* keep adjacent marks sorted: all rights, then all lefts */ if(m->gravity == Tkright) { while(ixnew->item->kind == TkTmark && ixnew->item->imark->gravity == Tkleft) if(!tktadjustind(tkt, TkTbyitem, ixnew)) break; } else { for(;;) { pix = *ixnew; if(!tktadjustind(tkt, TkTbyitemback, &pix)) break; if(pix.item->kind == TkTmark && pix.item->imark->gravity == Tkright) *ixnew = pix; else break; } } split = (ixnew->pos > 0); e = tktsplititem(ixnew); if(e != nil) return e; e = tktiteminsert(tkt, ixnew, i); if(e != nil) return nil; if(strcmp(m->name, "insert") == 0 || split) { if(deleted && ix.line != ixnew->line) { tktfixgeom(tk, tktprevwrapline(tk, ix.line), ix.line, 0); /* * this is ok only because tktfixgeom cannot * free mark items, and we know that i is a mark item. */ ixnew->item = i; ixnew->line = tktitemline(i); ixnew->pos = 0; } tktfixgeom(tk, tktprevwrapline(tk, ixnew->line), ixnew->line, 0); tktextsize(tk, 1); } ixnew->item = i; ixnew->line = tktitemline(i); ixnew->pos = 0; return nil; } /* Text Mark Commands (+ means implemented) +gravity +names +next +previous +set +unset */ static char* tktmarkgravity(Tk *tk, char *arg, char **val) { char *e; TkTmarkinfo *m; char *buf; e = tktmarkparse(tk, &arg, &m); if(e != nil) return e; if(*arg == '\0') return tkvalue(val, (m->gravity & Tkleft)? "left" : "right"); else { buf = mallocz(Tkmaxitem, 0); if(buf == nil) return TkNomem; tkword(tk->env->top, arg, buf, buf+Tkmaxitem, nil); if(strcmp(buf, "left") == 0) m->gravity = Tkleft; else if(strcmp(buf, "right") == 0) m->gravity = Tkright; else { free(buf); return TkBadcm; } free(buf); } return nil; } static char* tktmarknames(Tk *tk, char *arg, char **val) { char *r, *fmt; TkTmarkinfo *m; TkText *tkt = TKobj(TkText, tk); USED(arg); fmt = "%s"; for(m = tkt->marks; m != nil; m = m->next) { r = tkvalue(val, fmt, m->name); if(r != nil) return r; fmt = " %s"; } return nil; } static char* tktmarknext(Tk *tk, char *arg, char **val) { char *e; TkTmarkinfo *mix; TkTindex ix, ixend; TkText *tkt = TKobj(TkText, tk); /* special behavior if specified index is a mark name */ mix = tktfindmark(tkt->marks, arg); e = tktindparse(tk, &arg, &ix); if(e != nil) return e; if(mix != nil) tktadjustind(tkt, TkTbyitem, &ix); /* special behavior if index is 'end' */ tktendind(tkt, &ixend); if(tktindcompare(tkt, &ix, TkEq, &ixend)) { do { tktadjustind(tkt, TkTbyitemback, &ix); } while(ix.item->kind == TkTmark); } do { if(ix.item->kind == TkTmark) return tkvalue(val, "%s", ix.item->imark->name); } while(tktadjustind(tkt, TkTbyitem, &ix)); return nil; } static char* tktmarkprevious(Tk *tk, char *arg, char **val) { char *e; TkTindex ix; TkText *tkt = TKobj(TkText, tk); e = tktindparse(tk, &arg, &ix); if(e != nil) return e; while(tktadjustind(tkt, TkTbyitemback, &ix)) { if(ix.item->kind == TkTmark) return tkvalue(val, "%s", ix.item->imark->name); } return nil; } /* XXX - Tad: possible memory leak here */ static char* tktmarkset(Tk *tk, char *arg, char **val) { char *e; TkTmarkinfo *m; TkTindex ixnew; USED(val); e = tktmarkparse(tk, &arg, &m); if(e != nil) return e; e = tktindparse(tk, &arg, &ixnew); if(e != nil) return e; return tktmarkmove(tk, m, &ixnew); } static char* tktmarkunset(Tk *tk, char *arg, char **val) { TkText *tkt; TkTmarkinfo *m, **p; TkTindex ix; char *e; int resize; USED(val); tkt = TKobj(TkText, tk); e = tktmarkparse(tk, &arg, &m); if(e != nil) return e; resize = 0; while(m != nil) { if(strcmp(m->name, "insert") == 0 || strcmp(m->name, "current") == 0) return TkBadvl; if(m->cur != nil) { ix.item = m->cur; ix.line = tktitemline(m->cur); ix.pos = 0; tktremitem(tkt, &ix); tktfixgeom(tk, tktprevwrapline(tk, ix.line), ix.line, 0); resize = 1; } for(p = &tkt->marks; *p != nil; p = &(*p)->next) { if(*p == m) { *p = m->next; break; } } m->next = nil; tktfreemarks(m); if(*arg != '\0') { e = tktmarkparse(tk, &arg, &m); if(e != nil) return e; } else m = nil; } if (resize) tktextsize(tk, 1); return nil; }