| #include <u.h> |
| #include <libc.h> |
| #include <draw.h> |
| #include <mouse.h> |
| #include <frame.h> |
| |
| #define DELTA 25 |
| #define TMPSIZE 256 |
| static Frame frame; |
| |
| static |
| Point |
| bxscan(Frame *f, Rune *sp, Rune *ep, Point *ppt) |
| { |
| int w, c, nb, delta, nl, nr, rw; |
| Frbox *b; |
| char *s, tmp[TMPSIZE+3]; /* +3 for rune overflow */ |
| uchar *p; |
| |
| frame.r = f->r; |
| frame.b = f->b; |
| frame.font = f->font; |
| frame.maxtab = f->maxtab; |
| frame.nbox = 0; |
| frame.nchars = 0; |
| memmove(frame.cols, f->cols, sizeof frame.cols); |
| delta = DELTA; |
| nl = 0; |
| for(nb=0; sp<ep && nl<=f->maxlines; nb++,frame.nbox++){ |
| if(nb == frame.nalloc){ |
| _frgrowbox(&frame, delta); |
| if(delta < 10000) |
| delta *= 2; |
| } |
| b = &frame.box[nb]; |
| c = *sp; |
| if(c=='\t' || c=='\n'){ |
| b->bc = c; |
| b->wid = 5000; |
| b->minwid = (c=='\n')? 0 : stringwidth(frame.font, " "); |
| b->nrune = -1; |
| if(c=='\n') |
| nl++; |
| frame.nchars++; |
| sp++; |
| }else{ |
| s = tmp; |
| nr = 0; |
| w = 0; |
| while(sp < ep){ |
| c = *sp; |
| if(c=='\t' || c=='\n') |
| break; |
| rw = runetochar(s, sp); |
| if(s+rw >= tmp+TMPSIZE) |
| break; |
| w += runestringnwidth(frame.font, sp, 1); |
| sp++; |
| s += rw; |
| nr++; |
| } |
| *s++ = 0; |
| p = _frallocstr(f, s-tmp); |
| b = &frame.box[nb]; |
| b->ptr = p; |
| memmove(p, tmp, s-tmp); |
| b->wid = w; |
| b->nrune = nr; |
| frame.nchars += nr; |
| } |
| } |
| _frcklinewrap0(f, ppt, &frame.box[0]); |
| return _frdraw(&frame, *ppt); |
| } |
| |
| static |
| void |
| chopframe(Frame *f, Point pt, ulong p, int bn) |
| { |
| Frbox *b; |
| |
| for(b = &f->box[bn]; ; b++){ |
| if(b >= &f->box[f->nbox]) |
| drawerror(f->display, "endofframe"); |
| _frcklinewrap(f, &pt, b); |
| if(pt.y >= f->r.max.y) |
| break; |
| p += NRUNE(b); |
| _fradvance(f, &pt, b); |
| } |
| f->nchars = p; |
| f->nlines = f->maxlines; |
| if(b<&f->box[f->nbox]) /* BUG */ |
| _frdelbox(f, (int)(b-f->box), f->nbox-1); |
| } |
| |
| void |
| frinsert(Frame *f, Rune *sp, Rune *ep, ulong p0) |
| { |
| Point pt0, pt1, opt0, ppt0, ppt1, pt; |
| Frbox *b; |
| int n, n0, nn0, y; |
| ulong cn0; |
| Image *col; |
| Rectangle r; |
| static struct{ |
| Point pt0, pt1; |
| }*pts; |
| static int nalloc=0; |
| int npts; |
| |
| if(p0>f->nchars || sp==ep || f->b==nil) |
| return; |
| n0 = _frfindbox(f, 0, 0, p0); |
| cn0 = p0; |
| nn0 = n0; |
| pt0 = _frptofcharnb(f, p0, n0); |
| ppt0 = pt0; |
| opt0 = pt0; |
| pt1 = bxscan(f, sp, ep, &ppt0); |
| ppt1 = pt1; |
| if(n0 < f->nbox){ |
| _frcklinewrap(f, &pt0, b = &f->box[n0]); /* for frdrawsel() */ |
| _frcklinewrap0(f, &ppt1, b); |
| } |
| f->modified = 1; |
| /* |
| * ppt0 and ppt1 are start and end of insertion as they will appear when |
| * insertion is complete. pt0 is current location of insertion position |
| * (p0); pt1 is terminal point (without line wrap) of insertion. |
| */ |
| if(f->p0 == f->p1) |
| frtick(f, frptofchar(f, f->p0), 0); |
| |
| /* |
| * Find point where old and new x's line up |
| * Invariants: |
| * pt0 is where the next box (b, n0) is now |
| * pt1 is where it will be after the insertion |
| * If pt1 goes off the rectangle, we can toss everything from there on |
| */ |
| for(b = &f->box[n0],npts=0; |
| pt1.x!=pt0.x && pt1.y!=f->r.max.y && n0<f->nbox; b++,n0++,npts++){ |
| _frcklinewrap(f, &pt0, b); |
| _frcklinewrap0(f, &pt1, b); |
| if(b->nrune > 0){ |
| n = _frcanfit(f, pt1, b); |
| if(n == 0) |
| drawerror(f->display, "_frcanfit==0"); |
| if(n != b->nrune){ |
| _frsplitbox(f, n0, n); |
| b = &f->box[n0]; |
| } |
| } |
| if(npts == nalloc){ |
| pts = realloc(pts, (npts+DELTA)*sizeof(pts[0])); |
| nalloc += DELTA; |
| b = &f->box[n0]; |
| } |
| pts[npts].pt0 = pt0; |
| pts[npts].pt1 = pt1; |
| /* has a text box overflowed off the frame? */ |
| if(pt1.y == f->r.max.y) |
| break; |
| _fradvance(f, &pt0, b); |
| pt1.x += _frnewwid(f, pt1, b); |
| cn0 += NRUNE(b); |
| } |
| if(pt1.y > f->r.max.y) |
| drawerror(f->display, "frinsert pt1 too far"); |
| if(pt1.y==f->r.max.y && n0<f->nbox){ |
| f->nchars -= _frstrlen(f, n0); |
| _frdelbox(f, n0, f->nbox-1); |
| } |
| if(n0 == f->nbox) |
| f->nlines = (pt1.y-f->r.min.y)/f->font->height+(pt1.x>f->r.min.x); |
| else if(pt1.y!=pt0.y){ |
| int q0, q1; |
| |
| y = f->r.max.y; |
| q0 = pt0.y+f->font->height; |
| q1 = pt1.y+f->font->height; |
| f->nlines += (q1-q0)/f->font->height; |
| if(f->nlines > f->maxlines) |
| chopframe(f, ppt1, p0, nn0); |
| if(pt1.y < y){ |
| r = f->r; |
| r.min.y = q1; |
| r.max.y = y; |
| if(q1 < y) |
| draw(f->b, r, f->b, nil, Pt(f->r.min.x, q0)); |
| r.min = pt1; |
| r.max.x = pt1.x+(f->r.max.x-pt0.x); |
| r.max.y = q1; |
| draw(f->b, r, f->b, nil, pt0); |
| } |
| } |
| /* |
| * Move the old stuff down to make room. The loop will move the stuff |
| * between the insertion and the point where the x's lined up. |
| * The draw()s above moved everything down after the point they lined up. |
| */ |
| for((y=pt1.y==f->r.max.y?pt1.y:0),b = &f->box[n0-1]; --npts>=0; --b){ |
| pt = pts[npts].pt1; |
| if(b->nrune > 0){ |
| r.min = pt; |
| r.max = r.min; |
| r.max.x += b->wid; |
| r.max.y += f->font->height; |
| draw(f->b, r, f->b, nil, pts[npts].pt0); |
| /* clear bit hanging off right */ |
| if(npts==0 && pt.y>pt0.y){ |
| /* |
| * first new char is bigger than first char we're |
| * displacing, causing line wrap. ugly special case. |
| */ |
| r.min = opt0; |
| r.max = opt0; |
| r.max.x = f->r.max.x; |
| r.max.y += f->font->height; |
| if(f->p0<=cn0 && cn0<f->p1) /* b+1 is inside selection */ |
| col = f->cols[HIGH]; |
| else |
| col = f->cols[BACK]; |
| draw(f->b, r, col, nil, r.min); |
| }else if(pt.y < y){ |
| r.min = pt; |
| r.max = pt; |
| r.min.x += b->wid; |
| r.max.x = f->r.max.x; |
| r.max.y += f->font->height; |
| if(f->p0<=cn0 && cn0<f->p1) /* b+1 is inside selection */ |
| col = f->cols[HIGH]; |
| else |
| col = f->cols[BACK]; |
| draw(f->b, r, col, nil, r.min); |
| } |
| y = pt.y; |
| cn0 -= b->nrune; |
| }else{ |
| r.min = pt; |
| r.max = pt; |
| r.max.x += b->wid; |
| r.max.y += f->font->height; |
| if(r.max.x >= f->r.max.x) |
| r.max.x = f->r.max.x; |
| cn0--; |
| if(f->p0<=cn0 && cn0<f->p1) /* b is inside selection */ |
| col = f->cols[HIGH]; |
| else |
| col = f->cols[BACK]; |
| draw(f->b, r, col, nil, r.min); |
| y = 0; |
| if(pt.x == f->r.min.x) |
| y = pt.y; |
| } |
| } |
| /* insertion can extend the selection, so the condition here is different */ |
| if(f->p0<p0 && p0<=f->p1) |
| col = f->cols[HIGH]; |
| else |
| col = f->cols[BACK]; |
| frselectpaint(f, ppt0, ppt1, col); |
| _frdrawtext(&frame, ppt0, f->cols[TEXT], col); |
| _fraddbox(f, nn0, frame.nbox); |
| for(n=0; n<frame.nbox; n++) |
| f->box[nn0+n] = frame.box[n]; |
| if(nn0>0 && f->box[nn0-1].nrune>=0 && ppt0.x-f->box[nn0-1].wid>=f->r.min.x){ |
| --nn0; |
| ppt0.x -= f->box[nn0].wid; |
| } |
| n0 += frame.nbox; |
| _frclean(f, ppt0, nn0, n0<f->nbox-1? n0+1 : n0); |
| f->nchars += frame.nchars; |
| if(f->p0 >= p0) |
| f->p0 += frame.nchars; |
| if(f->p0 > f->nchars) |
| f->p0 = f->nchars; |
| if(f->p1 >= p0) |
| f->p1 += frame.nchars; |
| if(f->p1 > f->nchars) |
| f->p1 = f->nchars; |
| if(f->p0 == f->p1) |
| frtick(f, frptofchar(f, f->p0), 1); |
| } |