/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <u.h>#include <libc.h>#include <draw.h>#include <thread.h>#include <cursor.h>#include <mouse.h>#include <keyboard.h>#include <frame.h>#include <fcall.h>#include <plumb.h>#include "dat.h"#include "fns.h" voidcolinit(Column *c, Rectangle r){	Rectangle r1;	Text *t; 	draw(screen, r, display->white, nil, ZP);	c->r = r;	c->w = nil;	c->nw = 0;	t = &c->tag;	t->w = nil;	t->col = c;	r1 = r;	r1.max.y = r1.min.y + font->height;	textinit(t, fileaddtext(nil, t), r1, &reffont, tagcols);	t->what = Columntag;	r1.min.y = r1.max.y;	r1.max.y += Border;	draw(screen, r1, display->black, nil, ZP);	textinsert(t, 0, L"New Cut Paste Snarf Sort Zerox Delcol ", 38, TRUE);	textsetselect(t, t->file->nc, t->file->nc);	draw(screen, t->scrollr, colbutton, nil, colbutton->r.min);	c->safe = TRUE;} Window*coladd(Column *c, Window *w, Window *clone, int y){	Rectangle r, r1;	Window *v;	int i, t; 	v = nil;	r = c->r;	r.min.y = c->tag.r.max.y+Border;	if(y<r.min.y && c->nw>0){	/* steal half of last window by default */		v = c->w[c->nw-1];		y = v->body.r.min.y+Dy(v->body.r)/2;	}	/* look for window we'll land on */	for(i=0; i<c->nw; i++){		v = c->w[i];		if(y < v->r.max.y)			break;	}	if(c->nw > 0){		if(i < c->nw)			i++;	/* new window will go after v */		/*		 * if v's too small, grow it first.		 */		if(!c->safe || v->body.maxlines<=3){			colgrow(c, v, 1);			y = v->body.r.min.y+Dy(v->body.r)/2;		}		r = v->r;		if(i == c->nw)			t = c->r.max.y;		else			t = c->w[i]->r.min.y-Border;		r.max.y = t;		draw(screen, r, textcols[BACK], nil, ZP);		r1 = r;		y = min(y, t-(v->tag.font->height+v->body.font->height+Border+1));		r1.max.y = min(y, v->body.r.min.y+v->body.nlines*v->body.font->height);		r1.min.y = winresize(v, r1, FALSE);		r1.max.y = r1.min.y+Border;		draw(screen, r1, display->black, nil, ZP);		r.min.y = r1.max.y;	}	if(w == nil){		w = emalloc(sizeof(Window));		w->col = c;		draw(screen, r, textcols[BACK], nil, ZP);		wininit(w, clone, r);	}else{		w->col = c;		winresize(w, r, FALSE);	}	w->tag.col = c;	w->tag.row = c->row;	w->body.col = c;	w->body.row = c->row;	c->w = realloc(c->w, (c->nw+1)*sizeof(Window*));	memmove(c->w+i+1, c->w+i, (c->nw-i)*sizeof(Window*));	c->nw++;	c->w[i] = w;	savemouse(w);	/* near but not on the button */	moveto(mousectl, addpt(w->tag.scrollr.max, Pt(3, 3)));	barttext = &w->body;	c->safe = TRUE;	return w;} voidcolclose(Column *c, Window *w, int dofree){	Rectangle r;	int i; 	/* w is locked */	if(!c->safe)		colgrow(c, w, 1);	for(i=0; i<c->nw; i++)		if(c->w[i] == w)			goto Found;	error("can't find window");  Found:	r = w->r;	w->tag.col = nil;	w->body.col = nil;	w->col = nil;	restoremouse(w);	if(dofree){		windelete(w);		winclose(w);	}	memmove(c->w+i, c->w+i+1, (c->nw-i)*sizeof(Window*));	c->nw--;	c->w = realloc(c->w, c->nw*sizeof(Window*));	if(c->nw == 0){		draw(screen, r, display->white, nil, ZP);		return;	}	if(i == c->nw){		/* extend last window down */		w = c->w[i-1];		r.min.y = w->r.min.y;		r.max.y = c->r.max.y;	}else{			/* extend next window up */		w = c->w[i];		r.max.y = w->r.max.y;	}	draw(screen, r, textcols[BACK], nil, ZP);	if(c->safe)		winresize(w, r, FALSE);} voidcolcloseall(Column *c){	int i;	Window *w; 	if(c == activecol)		activecol = nil;	textclose(&c->tag);	for(i=0; i<c->nw; i++){		w = c->w[i];		winclose(w);	}	c->nw = 0;	free(c->w);	free(c);	clearmouse();} voidcolmousebut(Column *c){	moveto(mousectl, divpt(addpt(c->tag.scrollr.min, c->tag.scrollr.max), 2));} voidcolresize(Column *c, Rectangle r){	int i;	Rectangle r1, r2;	Window *w; 	clearmouse();	r1 = r;	r1.max.y = r1.min.y + c->tag.font->height;	textresize(&c->tag, r1);	draw(screen, c->tag.scrollr, colbutton, nil, colbutton->r.min);	r1.min.y = r1.max.y;	r1.max.y += Border;	draw(screen, r1, display->black, nil, ZP);	r1.max.y = r.max.y;	for(i=0; i<c->nw; i++){		w = c->w[i];		w->maxlines = 0;		if(i == c->nw-1)			r1.max.y = r.max.y;		else			r1.max.y = r1.min.y+(Dy(w->r)+Border)*Dy(r)/Dy(c->r);		r2 = r1;		r2.max.y = r2.min.y+Border;		draw(screen, r2, display->black, nil, ZP);		r1.min.y = r2.max.y;		r1.min.y = winresize(w, r1, FALSE);	}	c->r = r;} staticintcolcmp(void *a, void *b){	Rune *r1, *r2;	int i, nr1, nr2; 	r1 = (*(Window**)a)->body.file->name;	nr1 = (*(Window**)a)->body.file->nname;	r2 = (*(Window**)b)->body.file->name;	nr2 = (*(Window**)b)->body.file->nname;	for(i=0; i<nr1 && i<nr2; i++){		if(*r1 != *r2)			return *r1-*r2;		r1++;		r2++;	}	return nr1-nr2;} voidcolsort(Column *c){	int i, y;	Rectangle r, r1, *rp;	Window **wp, *w; 	if(c->nw == 0)		return;	clearmouse();	rp = emalloc(c->nw*sizeof(Rectangle));	wp = emalloc(c->nw*sizeof(Window*));	memmove(wp, c->w, c->nw*sizeof(Window*));	qsort(wp, c->nw, sizeof(Window*), colcmp);	for(i=0; i<c->nw; i++)		rp[i] = wp[i]->r;	r = c->r;	r.min.y = c->tag.r.max.y;	draw(screen, r, textcols[BACK], nil, ZP);	y = r.min.y;	for(i=0; i<c->nw; i++){		w = wp[i];		r.min.y = y;		if(i == c->nw-1)			r.max.y = c->r.max.y;		else			r.max.y = r.min.y+Dy(w->r)+Border;		r1 = r;		r1.max.y = r1.min.y+Border;		draw(screen, r1, display->black, nil, ZP);		r.min.y = r1.max.y;		y = winresize(w, r, FALSE);	}	free(rp);	free(c->w);	c->w = wp;} voidcolgrow(Column *c, Window *w, int but){	Rectangle r, cr;	int i, j, k, l, y1, y2, *nl, *ny, tot, nnl, onl, dnl, h;	Window *v; 	for(i=0; i<c->nw; i++)		if(c->w[i] == w)			goto Found;	error("can't find window");   Found:	cr = c->r;	if(but < 0){	/* make sure window fills its own space properly */		r = w->r;		if(i==c->nw-1 || c->safe==FALSE)			r.max.y = cr.max.y;		else			r.max.y = c->w[i+1]->r.min.y;		winresize(w, r, FALSE);		return;	}	cr.min.y = c->w[0]->r.min.y;	if(but == 3){	/* full size */		if(i != 0){			v = c->w[0];			c->w[0] = w;			c->w[i] = v;		}		draw(screen, cr, textcols[BACK], nil, ZP);		winresize(w, cr, FALSE);		for(i=1; i<c->nw; i++)			c->w[i]->body.maxlines = 0;		c->safe = FALSE;		return;	}	/* store old #lines for each window */	onl = w->body.maxlines;	nl = emalloc(c->nw * sizeof(int));	ny = emalloc(c->nw * sizeof(int));	tot = 0;	for(j=0; j<c->nw; j++){		l = c->w[j]->body.maxlines;		nl[j] = l;		tot += l;	}	/* approximate new #lines for this window */	if(but == 2){	/* as big as can be */		memset(nl, 0, c->nw * sizeof(int));		goto Pack;	}	nnl = min(onl + max(min(5, w->maxlines), onl/2), tot);	if(nnl < w->maxlines)		nnl = (w->maxlines+nnl)/2;	if(nnl == 0)		nnl = 2;	dnl = nnl - onl;	/* compute new #lines for each window */	for(k=1; k<c->nw; k++){		/* prune from later window */		j = i+k;		if(j<c->nw && nl[j]){			l = min(dnl, max(1, nl[j]/2));			nl[j] -= l;			nl[i] += l;			dnl -= l;		}		/* prune from earlier window */		j = i-k;		if(j>=0 && nl[j]){			l = min(dnl, max(1, nl[j]/2));			nl[j] -= l;			nl[i] += l;			dnl -= l;		}	}    Pack:	/* pack everyone above */	y1 = cr.min.y;	for(j=0; j<i; j++){		v = c->w[j];		r = v->r;		r.min.y = y1;		r.max.y = y1+Dy(v->tag.all);		if(nl[j])			r.max.y += 1 + nl[j]*v->body.font->height;		if(!c->safe || !eqrect(v->r, r)){			draw(screen, r, textcols[BACK], nil, ZP);			winresize(v, r, c->safe);		}		r.min.y = v->r.max.y;		r.max.y += Border;		draw(screen, r, display->black, nil, ZP);		y1 = r.max.y;	}	/* scan to see new size of everyone below */	y2 = c->r.max.y;	for(j=c->nw-1; j>i; j--){		v = c->w[j];		r = v->r;		r.min.y = y2-Dy(v->tag.all);		if(nl[j])			r.min.y -= 1 + nl[j]*v->body.font->height;		r.min.y -= Border;		ny[j] = r.min.y;		y2 = r.min.y;	}	/* compute new size of window */	r = w->r;	r.min.y = y1;	r.max.y = r.min.y+Dy(w->tag.all);	h = w->body.font->height;	if(y2-r.max.y >= 1+h+Border){		r.max.y += 1;		r.max.y += h*((y2-r.max.y)/h);	}	/* draw window */	if(!c->safe || !eqrect(w->r, r)){		draw(screen, r, textcols[BACK], nil, ZP);		winresize(w, r, c->safe);	}	if(i < c->nw-1){		r.min.y = r.max.y;		r.max.y += Border;		draw(screen, r, display->black, nil, ZP);		for(j=i+1; j<c->nw; j++)			ny[j] -= (y2-r.max.y);	}	/* pack everyone below */	y1 = r.max.y;	for(j=i+1; j<c->nw; j++){		v = c->w[j];		r = v->r;		r.min.y = y1;		r.max.y = y1+Dy(v->tag.all);		if(nl[j])			r.max.y += 1 + nl[j]*v->body.font->height;		if(!c->safe || !eqrect(v->r, r)){			draw(screen, r, textcols[BACK], nil, ZP);			winresize(v, r, c->safe);		}		if(j < c->nw-1){	/* no border on last window */			r.min.y = v->r.max.y;			r.max.y += Border;			draw(screen, r, display->black, nil, ZP);		}		y1 = r.max.y;	}	r = w->r;	r.min.y = y1;	r.max.y = c->r.max.y;	draw(screen, r, textcols[BACK], nil, ZP);	free(nl);	free(ny);	c->safe = TRUE;	winmousebut(w);} voidcoldragwin(Column *c, Window *w, int but){	Rectangle r;	int i, b;	Point p, op;	Window *v;	Column *nc; 	clearmouse();	setcursor(mousectl, &boxcursor);	b = mouse->buttons;	op = mouse->xy;	while(mouse->buttons == b)		readmouse(mousectl);	setcursor(mousectl, nil);	if(mouse->buttons){		while(mouse->buttons)			readmouse(mousectl);		return;	} 	for(i=0; i<c->nw; i++)		if(c->w[i] == w)			goto Found;	error("can't find window");   Found:	p = mouse->xy;	if(abs(p.x-op.x)<5 && abs(p.y-op.y)<5){		colgrow(c, w, but);		winmousebut(w);		return;	}	/* is it a flick to the right? */	if(abs(p.y-op.y)<10 && p.x>op.x+30 && rowwhichcol(c->row, p)==c)		p.x = op.x+Dx(w->r);	/* yes: toss to next column */	nc = rowwhichcol(c->row, p);	if(nc!=nil && nc!=c){		colclose(c, w, FALSE);		coladd(nc, w, nil, p.y);		winmousebut(w);		return;	}	if(i==0 && c->nw==1)		return;			/* can't do it */	if((i>0 && p.y<c->w[i-1]->r.min.y) || (i<c->nw-1 && p.y>w->r.max.y)	|| (i==0 && p.y>w->r.max.y)){		/* shuffle */		colclose(c, w, FALSE);		coladd(c, w, nil, p.y);		winmousebut(w);		return;	}	if(i == 0)		return;	v = c->w[i-1];	if(p.y < v->tag.all.max.y)		p.y = v->tag.all.max.y;	if(p.y > w->r.max.y-Dy(w->tag.all)-Border)		p.y = w->r.max.y-Dy(w->tag.all)-Border;	r = v->r;	r.max.y = p.y;	if(r.max.y > v->body.r.min.y){		r.max.y -= (r.max.y-v->body.r.min.y)%v->body.font->height;

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