ref: 608e406ec0d81e33bb6965c0ab6d25d5d12753cf
dir: /text.c/
#include <u.h> #include <libc.h> #include <draw.h> #include <mouse.h> #include <keyboard.h> #include <thread.h> #include <plumb.h> #include "w.h" enum { Scrollwidth = 12, Padding = 4, }; enum { Msnarf, Mplumb, }; char *menu2str[] = { "snarf", "plumb", nil, }; Menu menu2 = { menu2str }; void computelines(Text *t) { int i, x, w, l, c; Rune r; t->lines[0] = 0; t->nlines = 1; w = Dx(t->textr); x = 0; for(i = 0; i < t->ndata; ){ c = chartorune(&r, &t->data[i]); if(r == '\n'){ if(i + c == t->ndata) break; t->lines[t->nlines++] = i + c; x = 0; }else{ l = 0; if(r == '\t'){ x += stringwidth(t->font, " "); }else{ l = runestringnwidth(t->font, &r, 1); x += l; } if(x > w){ t->lines[t->nlines++] = i; x = l; } } i += c; } } int indexat(Text *t, Point p) { int line, i, s, e, x, c, l; Rune r; if(!ptinrect(p, t->textr)) return -1; line = t->offset + ((p.y - t->textr.min.y) / font->height); s = t->lines[line]; if(line+1 >= t->nlines) e = t->ndata; else e = t->lines[line+1]; x = t->textr.min.x; for(i = s; i <= e; ){ c = chartorune(&r, &t->data[i]); if(r == '\t') l = stringwidth(t->font, " "); else l = runestringnwidth(t->font, &r, 1); if(x <= p.x && p.x <= x+l) break; i += c; x += l; } return i; } void textinit(Text *t, Image *b, Rectangle r, Font *f, Image *cols[NCOLS]) { memset(t, 0, sizeof *t); t->b = b; t->font = f; t->s0 = -1; t->s1 = -1; t->offset = 0; textresize(t, r); memmove(t->cols, cols, sizeof t->cols); } void textset(Text *t, char *data, usize ndata) { t->data = data; t->ndata = ndata; computelines(t); } void textresize(Text *t, Rectangle r) { t->r = r; t->vlines = Dy(t->r) / t->font->height; t->scrollr = rectaddpt(Rect(0, 0, Scrollwidth, Dy(r)), r.min); t->textr = r; t->textr.min.x = t->scrollr.max.x + Padding; if(t->nlines > 0) computelines(t); } int selected(Text *t, int index) { int s0, s1; if(t->s0 < 0 || t->s1 < 0) return 0; s0 = t->s0 < t->s1 ? t->s0 : t->s1; s1 = t->s0 > t->s1 ? t->s0 : t->s1; return s0 <= index && index <= s1; } void drawline(Text *t, int index) { int i, s, e; Point p; Rune r; Image *fg, *bg; s = t->lines[t->offset+index]; if(t->offset+index+1 >= t->nlines) e = t->ndata; else e = t->lines[t->offset+index+1]; p = addpt(t->textr.min, Pt(0, index*font->height)); for(i = s; i < e; ){ fg = selected(t, i) ? t->cols[HTEXT] : t->cols[TEXT]; bg = selected(t, i) ? t->cols[HIGH] : t->cols[BACK]; i += chartorune(&r, &t->data[i]); if(r == '\n') if(s + 1 == e) /* empty line */ r = L' '; else continue; if(r == '\t') p = stringbg(t->b, p, fg, ZP, t->font, " ", bg, ZP); else p = runestringnbg(t->b, p, fg, ZP, t->font, &r, 1, bg, ZP); } } void textdraw(Text *t) { int i, h, y; Rectangle sr; draw(t->b, t->r, t->cols[BACK], nil, ZP); draw(t->b, t->scrollr, t->cols[BORD], nil, ZP); border(t->b, t->scrollr, 0, t->cols[TEXT], ZP); if(t->nlines > 0){ h = ((double)t->vlines / t->nlines) * Dy(t->scrollr); y = ((double)t->offset / t->nlines) * Dy(t->scrollr); sr = Rect(t->scrollr.min.x + 1, t->scrollr.min.y + y + 1, t->scrollr.max.x - 1, t->scrollr.min.y + y + h - 1); }else sr = insetrect(t->scrollr, -1); draw(t->b, sr, t->cols[BACK], nil, ZP); for(i = 0; i < t->vlines; i++){ if(t->offset+i >= t->nlines) break; drawline(t, i); } flushimage(display, 1); } static void scroll(Text *t, int lines) { if(t->nlines <= t->vlines) return; if(lines < 0 && t->offset == 0) return; if(lines > 0 && t->offset + t->vlines >= t->nlines) return; t->offset += lines; if(t->offset < 0) t->offset = 0; if(t->offset + t->nlines%t->vlines >= t->nlines) t->offset = t->nlines - t->nlines%t->vlines; textdraw(t); } void textkeyboard(Text *t, Rune k) { switch(k){ case Kup: scroll(t, -1); break; case Kdown: scroll(t, 1); break; case Kpgup: scroll(t, -t->vlines); break; case Kpgdown: scroll(t, t->vlines); break; case Khome: scroll(t, -t->nlines); break; case Kend: scroll(t, t->nlines); break; } } void snarfsel(Text *t) { int fd, s0, s1; if(t->s0 < 0 || t->s1 < 0) return; fd = open("/dev/snarf", OWRITE); if(fd < 0) return; s0 = t->s0 < t->s1 ? t->s0 : t->s1; s1 = t->s0 > t->s1 ? t->s0 : t->s1; write(fd, &t->data[s0], s1 - s0 + 1); close(fd); } void plumbsel(Text *t) { int fd, s0, s1; char *s; if(t->s0 < 0 || t->s1 < 0) return; fd = plumbopen("send", OWRITE); if(fd < 0) return; s0 = t->s0 < t->s1 ? t->s0 : t->s1; s1 = t->s0 > t->s1 ? t->s0 : t->s1; s = smprint("%.*s", s1 - s0 + 1, &t->data[s0]); plumbsendtext(fd, argv0, nil, nil, s); free(s); close(fd); } void menu2hit(Text *t, Mousectl *mc) { int n; n = menuhit(2, mc, &menu2, nil); switch(n){ case Msnarf: snarfsel(t); break; case Mplumb: plumbsel(t); break; } } void textmouse(Text *t, Mousectl *mc) { static selecting = 0; Point p; int n; if(ptinrect(mc->xy, t->scrollr)){ if(mc->buttons == 1){ n = (mc->xy.y - t->scrollr.min.y) / font->height; scroll(t, -n); }else if(mc->buttons == 2){ t->offset = (mc->xy.y - t->scrollr.min.y) * t->nlines / Dy(t->scrollr); textdraw(t); }else if(mc->buttons == 4){ n = (mc->xy.y - t->scrollr.min.y) / font->height; scroll(t, n); } }else if(ptinrect(mc->xy, t->textr)){ if(mc->buttons == 0) selecting = 0; if(mc->buttons == 1){ if(!selecting){ selecting = 1; t->s0 = t->s1 = -1; n = indexat(t, mc->xy); if(n < 0) return; t->s0 = n; t->s1 = -1; textdraw(t); }else{ n = indexat(t, mc->xy); if(n < 0) return; t->s1 = n; } for(readmouse(mc); mc->buttons == 1; readmouse(mc)){ p = mc->xy; if(p.y <= t->textr.min.y){ scroll(t, -1); p.y = t->textr.min.y + 1; }else if(p.y >= t->textr.max.y){ scroll(t, 1); p.y = t->textr.max.y - 1; } n = indexat(t, p); if(n < 0) break; t->s1 = n; textdraw(t); } }else if(mc->buttons == 2){ menu2hit(t, mc); }else if(mc->buttons == 8){ n = mousescrollsize(t->vlines); scroll(t, -n); }else if(mc->buttons == 16){ n = mousescrollsize(t->vlines); scroll(t, n); } } }