mirror of
https://hacklab.nilfm.cc/acme
synced 2024-10-22 14:31:48 +00:00
153 lines
3.2 KiB
C
153 lines
3.2 KiB
C
#include <u.h>
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#include <libc.h>
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#include <draw.h>
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#include <thread.h>
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#include <cursor.h>
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#include <mouse.h>
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#include <keyboard.h>
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#include <frame.h>
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#include <fcall.h>
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#include <plumb.h>
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#include <libsec.h>
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#include "dat.h"
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#include "fns.h"
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static Image* scrtmp;
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static Rectangle scrpos(Rectangle r, uint p0, uint p1, uint tot) {
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Rectangle q;
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int h;
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q = r;
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h = q.max.y - q.min.y;
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if (tot == 0)
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return q;
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if (tot > 1024 * 1024) {
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tot >>= 10;
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p0 >>= 10;
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p1 >>= 10;
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}
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if (p0 > 0)
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q.min.y += h * p0 / tot;
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if (p1 < tot)
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q.max.y -= h * (tot - p1) / tot;
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if (q.max.y < q.min.y + 2) {
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if (q.min.y + 2 <= r.max.y)
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q.max.y = q.min.y + 2;
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else
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q.min.y = q.max.y - 2;
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}
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return q;
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}
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void scrlresize(void) {
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freeimage(scrtmp);
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scrtmp = allocimage(
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display,
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Rect(0, 0, 32, screen->r.max.y),
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screen->chan,
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0,
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DNofill);
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if (scrtmp == nil)
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error("scroll alloc");
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}
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void textscrdraw(Text* t) {
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Rectangle r, r1, r2;
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Image* b;
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if (t->w == nil || t != &t->w->body)
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return;
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if (scrtmp == nil)
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scrlresize();
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r = t->scrollr;
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b = scrtmp;
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r1 = r;
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r1.min.x = 0;
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r1.max.x = Dx(r);
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r2 = scrpos(r1, t->org, t->org + t->fr.nchars, t->file->b.nc);
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if (!eqrect(r2, t->lastsr)) {
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t->lastsr = r2;
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draw(b, r1, t->fr.cols[BORD], nil, ZP);
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draw(b, r2, t->fr.cols[BACK], nil, ZP);
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r2.min.x = r2.max.x - 1;
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draw(b, r2, t->fr.cols[BORD], nil, ZP);
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draw(t->fr.b, r, b, nil, Pt(0, r1.min.y));
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/*flushimage(display, 1); // BUG? */
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}
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}
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void scrsleep(uint dt) {
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Timer* timer;
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static Alt alts[3];
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timer = timerstart(dt);
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alts[0].c = timer->c;
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alts[0].v = nil;
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alts[0].op = CHANRCV;
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alts[1].c = mousectl->c;
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alts[1].v = &mousectl->m;
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alts[1].op = CHANRCV;
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alts[2].op = CHANEND;
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for (;;)
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switch (alt(alts)) {
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case 0:
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timerstop(timer);
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return;
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case 1:
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timercancel(timer);
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return;
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}
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}
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void textscroll(Text* t, int but) {
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uint p0, oldp0;
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Rectangle s;
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int x, y, my, h, first;
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s = insetrect(t->scrollr, 1);
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h = s.max.y - s.min.y;
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x = (s.min.x + s.max.x) / 2;
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oldp0 = ~0;
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first = TRUE;
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do {
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flushimage(display, 1);
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my = mouse->xy.y;
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if (my < s.min.y)
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my = s.min.y;
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if (my >= s.max.y)
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my = s.max.y;
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if (!eqpt(mouse->xy, Pt(x, my))) {
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moveto(mousectl, Pt(x, my));
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readmouse(mousectl); /* absorb event generated by moveto() */
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}
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if (but == 2) {
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y = my;
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p0 = (vlong)t->file->b.nc * (y - s.min.y) / h;
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if (p0 >= t->q1)
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p0 = textbacknl(t, p0, 2);
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if (oldp0 != p0)
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textsetorigin(t, p0, FALSE);
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oldp0 = p0;
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readmouse(mousectl);
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continue;
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}
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if (but == 1)
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p0 = textbacknl(t, t->org, (my - s.min.y) / t->fr.font->height);
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else
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p0 = t->org + frcharofpt(&t->fr, Pt(s.max.x, my));
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if (oldp0 != p0)
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textsetorigin(t, p0, TRUE);
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oldp0 = p0;
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/* debounce */
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if (first) {
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flushimage(display, 1);
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sleep(200);
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nbrecv(mousectl->c, &mousectl->m);
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first = FALSE;
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}
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scrsleep(80);
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} while (mouse->buttons & (1 << (but - 1)));
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while (mouse->buttons)
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readmouse(mousectl);
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}
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