ref: 0bc963f9289643010f18f0adf90441f83141c04c
dir: /sys/src/libdraw/enter.c/
#include <u.h> #include <libc.h> #include <draw.h> #include <thread.h> #include <mouse.h> #include <keyboard.h> int enter(char *ask, char *buf, int len, Mousectl *mc, Keyboardctl *kc, Screen *scr) { int done, down, tick, n, h, w, l, i; Image *b, *save, *backcol, *bordcol; Point p, o, t; Rectangle r, sc; Alt a[3]; Mouse m; Rune k; o = screen->r.min; backcol = allocimagemix(display, DPurpleblue, DWhite); bordcol = allocimage(display, Rect(0,0,1,1), screen->chan, 1, DPurpleblue); if(backcol == nil || bordcol == nil) return -1; sc = screen->clipr; replclipr(screen, 0, screen->r); n = 0; if(kc){ while(nbrecv(kc->c, nil) == 1) ; a[n].op = CHANRCV; a[n].c = kc->c; a[n].v = &k; n++; } if(mc){ o = mc->xy; a[n].op = CHANRCV; a[n].c = mc->c; a[n].v = &m; n++; } a[n].op = CHANEND; a[n].c = nil; a[n].v = nil; if(buf && len > 0) n = strlen(buf); else { buf = nil; len = 0; n = 0; } k = -1; b = nil; tick = n; save = nil; done = down = 0; p = stringsize(font, " "); h = p.y; w = p.x; while(!done){ p = stringsize(font, buf ? buf : ""); if(ask && ask[0]){ if(buf) p.x += w; p.x += stringwidth(font, ask); } r = rectaddpt(insetrect(Rpt(ZP, p), -4), o); p.x = 0; r = rectsubpt(r, p); p = ZP; if(r.min.x < screen->r.min.x) p.x = screen->r.min.x - r.min.x; if(r.min.y < screen->r.min.y) p.y = screen->r.min.y - r.min.y; r = rectaddpt(r, p); p = ZP; if(r.max.x > screen->r.max.x) p.x = r.max.x - screen->r.max.x; if(r.max.y > screen->r.max.y) p.y = r.max.y - screen->r.max.y; r = rectsubpt(r, p); r = insetrect(r, -2); if(scr){ if(b == nil) b = allocwindow(scr, r, Refbackup, DWhite); if(b == nil) scr = nil; } if(scr == nil && save == nil){ if(b == nil) b = screen; save = allocimage(display, r, b->chan, 0, DNofill); if(save == nil){ n = -1; break; } draw(save, r, b, nil, r.min); } draw(b, r, backcol, nil, ZP); border(b, r, 2, bordcol, ZP); p = addpt(r.min, Pt(6, 6)); if(ask && ask[0]){ p = string(b, p, bordcol, ZP, font, ask); if(buf) p.x += w; } if(buf){ t = p; p = stringn(b, p, display->black, ZP, font, buf, utfnlen(buf, tick)); draw(b, Rect(p.x-1, p.y, p.x+2, p.y+3), display->black, nil, ZP); draw(b, Rect(p.x, p.y, p.x+1, p.y+h), display->black, nil, ZP); draw(b, Rect(p.x-1, p.y+h-3, p.x+2, p.y+h), display->black, nil, ZP); p = string(b, p, display->black, ZP, font, buf+tick); } flushimage(display, 1); nodraw: switch(alt(a)){ case -1: done = 1; n = -1; break; case 0: if(buf == nil || k == Keof || k == '\n'){ done = 1; break; } if(k == Knack || k == Kesc){ done = !n; buf[n = tick = 0] = 0; break; } if(k == Ksoh || k == Khome){ tick = 0; continue; } if(k == Kenq || k == Kend){ tick = n; continue; } if(k == Kright){ if(tick < n) tick += chartorune(&k, buf+tick); continue; } if(k == Kleft){ for(i = 0; i < n; i += l){ l = chartorune(&k, buf+tick); if(i+l >= tick){ tick = i; break; } } continue; } if(k == Ketb){ while(tick > 0){ tick--; if(tick == 0 || strchr(" !\"#$%&'()*+,-./:;<=>?@`[\\]^{|}~", buf[tick-1])) break; } buf[n = tick] = 0; break; } if(k == Kbs){ if(tick <= 0) continue; for(i = 0; i < n; i += l){ l = chartorune(&k, buf+i); if(i+l >= tick){ memmove(buf+i, buf+i+l, n - (i+l)); buf[n -= l] = 0; tick -= l; break; } } break; } if(k < 0x20 || k == Kdel || (k & 0xFF00) == KF || (k & 0xFF00) == Spec) continue; if((len-n) <= (l = runelen(k))) continue; memmove(buf+tick+l, buf+tick, n - tick); runetochar(buf+tick, &k); buf[n += l] = 0; tick += l; break; case 1: if(!ptinrect(m.xy, r)){ down = 0; goto nodraw; } if(m.buttons & 7){ down = 1; if(buf && m.xy.x >= (t.x - w)){ down = 0; for(i = 0; i < n; i += l){ l = chartorune(&k, buf+i); t.x += stringnwidth(font, buf+i, 1); if(t.x > m.xy.x) break; } tick = i; } continue; } done = down; break; } if(b != screen) { freeimage(b); b = nil; } else { draw(b, save->r, save, nil, save->r.min); freeimage(save); save = nil; } } replclipr(screen, 0, sc); freeimage(backcol); freeimage(bordcol); flushimage(display, 1); return n; }