Import sources from 2011-03-30 iso image

1 files changed, 317 insertions, 0 deletions

diff --git a/sys/src/cmd/abaco/scrl.c b/sys/src/cmd/abaco/scrl.c
new file mode 100755
index 000000000..3b7072f97
--- /dev/null
+++ b/sys/src/cmd/abaco/scrl.c
@@ -0,0 +1,317 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <memdraw.h>
+#include <thread.h>
+#include <cursor.h>
+#include <mouse.h>
+#include <keyboard.h>
+#include <frame.h>
+#include <plumb.h>
+#include <html.h>
+#include "dat.h"
+#include "fns.h"
+
+static Image *vscrtmp;
+static Image *hscrtmp;
+
+void
+scrlresize(void)
+{
+	freeimage(vscrtmp);
+	freeimage(hscrtmp);
+	vscrtmp = eallocimage(display, Rect(0, 0, 32, screen->r.max.y), screen->chan, 0, DNofill);
+	hscrtmp = eallocimage(display, Rect(0, 0, screen->r.max.x, 32), screen->chan, 0, DNofill);
+}
+
+static
+Rectangle
+scrpos(Rectangle r, uint p0, uint p1, uint tot)
+{
+	Rectangle q;
+	int h;
+
+	q = r;
+	h = q.max.y-q.min.y;
+	if(tot == 0)
+		return q;
+	if(tot > 1024*1024){
+		tot>>=10;
+		p0>>=10;
+		p1>>=10;
+	}
+	if(p0 > 0)
+		q.min.y += h*p0/tot;
+	if(p1 < tot)
+		q.max.y -= h*(tot-p1)/tot;
+	if(q.max.y < q.min.y+2){
+		if(q.min.y+2 <= r.max.y)
+			q.max.y = q.min.y+2;
+		else
+			q.min.y = q.max.y-2;
+	}
+	return q;
+}
+
+void
+textscrdraw(Text *t)
+{
+	Rectangle r, r1, r2;
+	Image *b;
+
+	if(vscrtmp == nil)
+		scrlresize();
+	r = t->scrollr;
+	b = vscrtmp;
+	r1 = r;
+	r1.min.x = 0;
+	r1.max.x = Dx(r);
+	r2 = scrpos(r1, t->org, t->org+t->nchars, t->rs.nr);
+	if(!eqrect(r2, t->lastsr)){
+		t->lastsr = r2;
+		draw(b, r1, t->cols[BORD], nil, ZP);
+		draw(b, r2, t->cols[BACK], nil, ZP);
+		r2.min.x = r2.max.x-1;
+		draw(b, r2, t->cols[BORD], nil, ZP);
+		draw(t->b, r, b, nil, Pt(0, r1.min.y));
+/*flushimage(display, 1);/*BUG?*/
+	}
+}
+
+void
+scrsleep(uint dt)
+{
+	Timer	*timer;
+	static Alt alts[3];
+
+	timer = timerstart(dt);
+	alts[0].c = timer->c;
+	alts[0].v = nil;
+	alts[0].op = CHANRCV;
+	alts[1].c = mousectl->c;
+	alts[1].v = &mousectl->Mouse;
+	alts[1].op = CHANRCV;
+	alts[2].op = CHANEND;
+	for(;;)
+		switch(alt(alts)){
+		case 0:
+			timerstop(timer);
+			return;
+		case 1:
+			timercancel(timer);
+			return;
+		}
+}
+
+void
+textscroll(Text *t, int but)
+{
+	uint p0, oldp0;
+	Rectangle s;
+	int x, y, my, h, first;
+
+	s = insetrect(t->scrollr, 1);
+	h = s.max.y-s.min.y;
+	x = (s.min.x+s.max.x)/2;
+	oldp0 = ~0;
+	first = TRUE;
+	do{
+		flushimage(display, 1);
+		my = mouse->xy.y;
+		if(my < s.min.y)
+			my = s.min.y;
+		if(my >= s.max.y)
+			my = s.max.y;
+		if(!eqpt(mouse->xy, Pt(x, my))){
+			moveto(mousectl, Pt(x, my));
+			readmouse(mousectl);		/* absorb event generated by moveto() */
+		}
+		if(but == 2){
+			y = my;
+			p0 = (vlong)t->rs.nr*(y-s.min.y)/h;
+			if(p0 >= t->q1)
+				p0 = textbacknl(t, p0, 2);
+			if(oldp0 != p0)
+				textsetorigin(t, p0, FALSE);
+			oldp0 = p0;
+			readmouse(mousectl);
+			continue;
+		}
+		if(but == 1)
+			p0 = textbacknl(t, t->org, (my-s.min.y)/t->font->height);
+		else
+			p0 = t->org+frcharofpt(t, Pt(s.max.x, my));
+		if(oldp0 != p0)
+			textsetorigin(t, p0, TRUE);
+		oldp0 = p0;
+		/* debounce */
+		if(first){
+			flushimage(display, 1);
+			sleep(200);
+			nbrecv(mousectl->c, &mousectl->Mouse);
+			first = FALSE;
+		}
+		scrsleep(80);
+	}while(mouse->buttons & (1<<(but-1)));
+	while(mouse->buttons)
+		readmouse(mousectl);
+}
+
+enum
+{
+	Scrbord = 1,
+};
+
+void
+pagescrldraw(Page *p)
+{
+	Rectangle r1;
+	int t, d, l, h;
+
+	if(vscrtmp == nil)
+		scrlresize();
+
+	r1 = Rect(0,0,Dx(p->hscrollr), Dy(p->hscrollr));
+	d = Dx(r1);
+	t = Dx(p->lay->r);
+	l = muldiv(p->pos.x, d, t);
+	h = muldiv(p->pos.x+d, d, t);
+	draw(hscrtmp, r1, tagcols[HIGH], nil, ZP);
+	r1.max.x = r1.min.x+h;
+	r1.min.x += l;
+	r1.min.y += Scrbord;
+	r1.max.y -= Scrbord;
+	draw(hscrtmp, r1, tagcols[BACK], nil, ZP);
+
+	r1 = Rect(0,0,Dx(p->vscrollr), Dy(p->vscrollr));
+	d = Dy(r1);
+	t = Dy(p->lay->r);
+	l = muldiv(p->pos.y, d, t);
+	h = muldiv(p->pos.y+d, d, t);
+	draw(vscrtmp, r1, tagcols[HIGH], nil, ZP);
+	r1.max.y = r1.min.y+h;
+	r1.min.y += l;
+	r1.max.x -= Scrbord;
+	r1.min.x += Scrbord;
+	draw(vscrtmp, r1, tagcols[BACK], nil, ZP);
+
+	draw(screen, p->vscrollr, vscrtmp, nil, vscrtmp->r.min);
+	draw(screen, p->hscrollr, hscrtmp, nil, hscrtmp->r.min);
+}
+
+void
+pagescroll(Page *p, int but, int horizontal)
+{
+	uint oldp0, p0;
+	Rectangle s;
+	Point mxy;
+	int i, m, om, first, d, size;
+	int smin, smax, ss, *pos;
+
+	if(horizontal){
+		s = insetrect(p->hscrollr, 1);
+		ss = s.max.x - s.min.x;
+		i = (s.min.y+s.max.y)/2;
+		d = Dx(p->r);
+		size = Dx(p->lay->r);
+		p0 = p->pos.x;
+		pos = &p->pos.x;
+		smin =  s.min.x;
+		smax = s.max.x;
+		om = mouse->xy.x;
+	}else{
+		s = insetrect(p->vscrollr, 1);
+		ss = s.max.y-s.min.y;
+		i = (s.min.x+s.max.x)/2;
+		d = Dy(p->r);
+		size = Dy(p->lay->r);
+		p0 = p->pos.y;
+		pos = &p->pos.y;
+		smin =  s.min.y;
+		smax = s.max.y;
+		om = mouse->xy.y;
+	}
+	oldp0 = ~0;
+	first = TRUE;
+	do{
+		flushimage(display, 1);
+		if(horizontal)
+			m = mouse->xy.x;
+		else
+			m = mouse->xy.y;
+
+		if(m > om)
+			m += (m-om)*Panspeed;
+		else if(m < om)
+			m -= (om-m)*Panspeed;
+
+		if(m < smin)
+			m = smin;
+		if(m > smax)
+			m = smax;
+
+		om = m;
+		if(horizontal)
+			mxy = Pt(m, i);
+		else
+			mxy = Pt(i, m);
+		if(!eqpt(mouse->xy, mxy)){
+			moveto(mousectl, mxy);
+			readmouse(mousectl);	/* absorb event generated by moveto() */
+		}
+		if(but == 2){
+			p0 = muldiv(m-smin, size, ss);
+			p0 = max(p0, 0);
+			p0 = min(p0,size-d);
+			if(oldp0 != p0){
+				*pos = p0;
+				pageredraw(p);
+			}
+			oldp0 = p0;
+			readmouse(mousectl);
+			continue;
+		}
+		if(but == 1)
+			p0 -= (d/2);
+		else
+			p0 += d/2;
+		p0 = min(p0, size-d);
+		p0 = max(p0, 0);
+		if(oldp0 != p0){
+			*pos = p0;
+			pageredraw(p);
+		}
+		oldp0 = p0;
+		/* debounce */
+		if(first){
+			flushimage(display, 1);
+			sleep(200);
+			nbrecv(mousectl->c, &mousectl->Mouse);
+			first = FALSE;
+		}
+		scrsleep(80);
+	}while(mouse->buttons & (1<<(but-1)));
+	while(mouse->buttons)
+		readmouse(mousectl);
+}
+
+int
+pagescrollxy(Page *p, int x, int y)
+{
+	int scrled;
+
+	scrled = FALSE;
+	if(x != 0){
+		p->pos.x += x;
+		p->pos.x = max(p->pos.x, 0);
+		p->pos.x = min(p->pos.x, Dx(p->lay->r)-Dx(p->r));
+		scrled =TRUE;
+	}
+	if(y != 0){
+		p->pos.y += y;
+		p->pos.y = max(p->pos.y, 0);
+		p->pos.y = min(p->pos.y, Dy(p->lay->r)-Dy(p->r));
+		scrled =TRUE;
+	}
+	return scrled;
+}