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- #include <u.h>
- #include <libc.h>
- #include <draw.h>
- #include <thread.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);
- _frredraw(&frame, ppt0);
- _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);
- }
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