mirror of
https://hacklab.nilfm.cc/acme
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99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
#include <u.h>
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#include <libc.h>
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#include <draw.h>
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#include <mouse.h>
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#include <frame.h>
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int _frcanfit(Frame* f, Point pt, Frbox* b) {
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int left, w, nr;
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uchar* p;
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Rune r;
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left = f->r.max.x - pt.x;
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if (b->nrune < 0)
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return b->minwid <= left;
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if (left >= b->wid)
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return b->nrune;
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for (nr = 0, p = b->ptr; *p; p += w, nr++) {
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r = *p;
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if (r < Runeself)
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w = 1;
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else
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w = chartorune(&r, (char*)p);
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left -= stringnwidth(f->font, (char*)p, 1);
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if (left < 0)
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return nr;
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}
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drawerror(f->display, "_frcanfit can't");
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return 0;
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}
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void _frcklinewrap(Frame* f, Point* p, Frbox* b) {
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if ((b->nrune < 0 ? b->minwid : b->wid) > f->r.max.x - p->x) {
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p->x = f->r.min.x;
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p->y += f->font->height;
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}
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}
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void _frcklinewrap0(Frame* f, Point* p, Frbox* b) {
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if (_frcanfit(f, *p, b) == 0) {
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p->x = f->r.min.x;
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p->y += f->font->height;
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}
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}
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void _fradvance(Frame* f, Point* p, Frbox* b) {
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if (b->nrune < 0 && b->bc == '\n') {
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p->x = f->r.min.x;
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p->y += f->font->height;
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} else
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p->x += b->wid;
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}
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int _frnewwid(Frame* f, Point pt, Frbox* b) {
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b->wid = _frnewwid0(f, pt, b);
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return b->wid;
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}
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int _frnewwid0(Frame* f, Point pt, Frbox* b) {
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int c, x;
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c = f->r.max.x;
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x = pt.x;
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if (b->nrune >= 0 || b->bc != '\t')
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return b->wid;
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if (x + b->minwid > c)
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x = pt.x = f->r.min.x;
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x += f->maxtab;
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x -= (x - f->r.min.x) % f->maxtab;
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if (x - pt.x < b->minwid || x > c)
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x = pt.x + b->minwid;
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return x - pt.x;
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}
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void _frclean(Frame* f, Point pt, int n0, int n1) /* look for mergeable boxes */
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{
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Frbox* b;
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int nb, c;
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c = f->r.max.x;
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for (nb = n0; nb < n1 - 1; nb++) {
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b = &f->box[nb];
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_frcklinewrap(f, &pt, b);
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while (b[0].nrune >= 0 && nb < n1 - 1 && b[1].nrune >= 0 &&
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pt.x + b[0].wid + b[1].wid < c) {
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_frmergebox(f, nb);
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n1--;
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b = &f->box[nb];
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}
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_fradvance(f, &pt, &f->box[nb]);
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}
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for (; nb < f->nbox; nb++) {
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b = &f->box[nb];
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_frcklinewrap(f, &pt, b);
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_fradvance(f, &pt, &f->box[nb]);
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}
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f->lastlinefull = 0;
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if (pt.y >= f->r.max.y)
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f->lastlinefull = 1;
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}
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