/*  * 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 <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" voidrowinit(Row *row, Rectangle r){	Rectangle r1;	Text *t; 	draw(screen, r, display->white, nil, ZP);	row->r = r;	row->col = nil;	row->ncol = 0;	r1 = r;	r1.max.y = r1.min.y + font->height;	t = &row->tag;	textinit(t, screen, r1, font, tagcols);	t->what = Rowtag;	t->row = row;	t->w = nil;	t->col = nil;	r1.min.y = r1.max.y;	r1.max.y += Border;	draw(screen, r1, display->black, nil, ZP);	textinsert(t, 0, L"Newcol Google Exit ", 19);	textsetselect(t, t->rs.nr, t->rs.nr);} Column*rowadd(Row *row, Column *c, int x){	Rectangle r, r1;	Column *d;	int i; 	d = nil;	r = row->r;	r.min.y = row->tag.r.max.y+Border;	if(x<r.min.x && row->ncol>0){	/*steal 40% of last column by default */		d = row->col[row->ncol-1];		x = d->r.min.x + 3*Dx(d->r)/5;	}	/* look for column we'll land on */	for(i=0; i<row->ncol; i++){		d = row->col[i];		if(x < d->r.max.x)			break;	}	if(row->ncol > 0){		if(i < row->ncol)			i++;	/* new column will go after d */		r = d->r;		if(Dx(r) < 100)			return nil;		draw(screen, r, display->white, nil, ZP);		r1 = r;		r1.max.x = min(x, r.max.x-50);		if(Dx(r1) < 50)			r1.max.x = r1.min.x+50;		colresize(d, r1);		r1.min.x = r1.max.x;		r1.max.x = r1.min.x+Border;		draw(screen, r1, display->black, nil, ZP);		r.min.x = r1.max.x;	}	if(c == nil){		c = emalloc(sizeof(Column));		colinit(c, r);	}else		colresize(c, r);	c->row = row;	c->tag.row = row;	row->col = realloc(row->col, (row->ncol+1)*sizeof(Column*));	memmove(row->col+i+1, row->col+i, (row->ncol-i)*sizeof(Column*));	row->col[i] = c;	row->ncol++;	clearmouse();	return c;} voidrowresize(Row *row, Rectangle r){	int i, dx, odx;	Rectangle r1, r2;	Column *c; 	dx = Dx(r);	odx = Dx(row->r);	row->r = r;	r1 = r;	r1.max.y = r1.min.y + font->height;	textresize(&row->tag, screen, r1);	r1.min.y = r1.max.y;	r1.max.y += Border;	draw(screen, r1, display->black, nil, ZP);	r.min.y = r1.max.y;	r1 = r;	r1.max.x = r1.min.x;	for(i=0; i<row->ncol; i++){		c = row->col[i];		r1.min.x = r1.max.x;		if(i == row->ncol-1)			r1.max.x = r.max.x;		else			r1.max.x = r1.min.x+Dx(c->r)*dx/odx;		if(i > 0){			r2 = r1;			r2.max.x = r2.min.x+Border;			draw(screen, r2, display->black, nil, ZP);			r1.min.x = r2.max.x;		}		colresize(c, r1);	}} voidrowdragcol(Row *row, Column *c, int){	Rectangle r;	int i, b, x;	Point p, op;	Column *d; 	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<row->ncol; i++)		if(row->col[i] == c)			goto Found;	error("can't find column");   Found:	if(i == 0)		return;	p = mouse->xy;	if((abs(p.x-op.x)<5 && abs(p.y-op.y)<5))		return;	if((i>0 && p.x<row->col[i-1]->r.min.x) || (i<row->ncol-1 && p.x>c->r.max.x)){		/* shuffle */		x = c->r.min.x;		rowclose(row, c, FALSE);		if(rowadd(row, c, p.x) == nil)	/* whoops! */		if(rowadd(row, c, x) == nil)		/* WHOOPS! */		if(rowadd(row, c, -1)==nil){		/* shit! */			rowclose(row, c, TRUE);			return;		}		colmousebut(c);		return;	}	d = row->col[i-1];	if(p.x < d->r.min.x+80+Scrollsize)		p.x = d->r.min.x+80+Scrollsize;	if(p.x > c->r.max.x-80-Scrollsize)		p.x = c->r.max.x-80-Scrollsize;	r = d->r;	r.max.x = c->r.max.x;	draw(screen, r, display->white, nil, ZP);	r.max.x = p.x;	colresize(d, r);	r = c->r;	r.min.x = p.x;	r.max.x = r.min.x;	r.max.x += Border;	draw(screen, r, display->black, nil, ZP);	r.min.x = r.max.x;	r.max.x = c->r.max.x;	colresize(c, r);	colmousebut(c);} voidrowclose(Row *row, Column *c, int dofree){	Rectangle r;	int i; 	for(i=0; i<row->ncol; i++)		if(row->col[i] == c)			goto Found;	error("can't find column");  Found:	r = c->r;	if(dofree)		colcloseall(c);	memmove(row->col+i, row->col+i+1, (row->ncol-i)*sizeof(Column*));	row->ncol--;	row->col = realloc(row->col, row->ncol*sizeof(Column*));	if(row->ncol == 0){		draw(screen, r, display->white, nil, ZP);		return;	}	if(i == row->ncol){		/* extend last column right */		c = row->col[i-1];		r.min.x = c->r.min.x;		r.max.x = row->r.max.x;	}else{			/* extend next window left */		c = row->col[i];		r.max.x = c->r.max.x;	}	draw(screen, r, display->white, nil, ZP);	colresize(c, r);} Column*rowwhichcol(Row *row, Point p){	int i;	Column *c; 	for(i=0; i<row->ncol; i++){		c = row->col[i];		if(ptinrect(p, c->r))			return c;	}	return nil;} Text*rowwhich(Row *row, Point p, Rune r, int key){	Column *c; 	if(ptinrect(p, row->tag.all))		return &row->tag;	c = rowwhichcol(row, p);	if(c)		return colwhich(c, p, r, key);	return nil;}