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/*
* Fonted text viewer, calls out to code in rtext.c
*
* Should redo this to copy the already-visible parts on scrolling & only
* update the newly appearing stuff -- then the offscreen assembly bitmap can go away.
*/
#include <u.h>
#include <libc.h>
#include <draw.h>
#include <event.h>
#include <panel.h>
#include "pldefs.h"
#include "rtext.h"
typedef struct Textview Textview;
struct Textview{
void (*hit)(Panel *, int, Rtext *); /* call back to user on hit */
Rtext *text; /* text */
int yoffs; /* offset of top of screen */
Rtext *hitword; /* text to hilite */
Rtext *hitfirst; /* first word in range select */
Image *hitsave; /* for restoring hilit text */
int twid; /* text width */
int thgt; /* text height */
Point minsize; /* smallest acceptible window size */
int buttons;
char *snarf;
char *esnarf;
};
/*
* Highlight a range of words from s to e.
*/
void pl_hilitewords(Panel *p, Rtext *s, Rtext *e, int on)
{
Point ul, size;
Rectangle r;
Textview *tp;
Rtext *t;
if(s==0 || e==0)
return;
for(t=s; t!=0 && t!=e; t=t->next)
;
if(t==e){
r=s->r;
for(t=s; t!=e; t=t->next)
combinerect(&r, t->r);
}else{
r=e->r;
for(t=e; t!=s; t=t->next)
combinerect(&r, t->r);
}
combinerect(&r, t->r);
tp=p->data;
ul=p->r.min;
size=subpt(p->r.max, p->r.min);
pl_interior(UP, &ul, &size);
ul.y-=tp->yoffs;
r=rectaddpt(r, ul);
if(rectclip(&r, p->r)==0)
return;
if(on){
if(tp->hitsave) freeimage(tp->hitsave);
tp->hitsave = allocimage(display, r, screen->chan, 0, DNofill);
if(tp->hitsave) draw(tp->hitsave, r, p->b, 0, r.min);
if(t==e){
for(t=s; t!=e; t=t->next){
if(t->p!=0) continue;
r=rectaddpt(t->r, ul);
if(rectclip(&r, p->r))
pl_highlight(p->b, r);
}
}else{
for(t=e; t!=s; t=t->next){
if(t->p!=0) continue;
r=rectaddpt(t->r, ul);
if(rectclip(&r, p->r))
pl_highlight(p->b, r);
}
}
if(t->p==0){
r=rectaddpt(t->r, ul);
if(rectclip(&r, p->r))
pl_highlight(p->b, r);
}
} else {
if(tp->hitsave){
draw(p->b, r, tp->hitsave, 0, r.min);
freeimage(tp->hitsave);
tp->hitsave = 0;
}
}
}
void pl_stuffbitmap(Panel *p, Image *b){
p->b=b;
for(p=p->child;p;p=p->next)
pl_stuffbitmap(p, b);
}
/*
* If we draw the text in a backup bitmap and copy it onto the screen,
* the bitmap pointers in all the subpanels point to the wrong bitmap.
* This code fixes them.
*/
void pl_drawnon(Rtext *rp, Image *b){
for(;rp!=0;rp=rp->next)
if(rp->b==0 && rp->p!=0)
pl_stuffbitmap(rp->p, b);
}
/*
* Mark the hilite and update the scroll bar
*/
void pl_fixtextview(Panel *p, Textview *tp, Rectangle r){
Panel *sb;
int lo, hi;
pl_hilitewords(p, tp->hitword, tp->hitfirst, 1);
lo=tp->yoffs;
hi=lo+r.max.y-r.min.y; /* wrong? */
sb=p->yscroller;
if(sb && sb->setscrollbar) sb->setscrollbar(sb, lo, hi, tp->thgt);
}
void pl_drawtextview(Panel *p){
int twid;
Rectangle r;
Textview *tp;
Image *b;
tp=p->data;
b=allocimage(display, p->r, screen->chan, 0, DNofill);
if(b==0) b=p->b;
r=pl_outline(b, p->r, p->state);
twid=r.max.x-r.min.x;
if(twid!=tp->twid){
tp->twid=twid;
tp->thgt=pl_rtfmt(tp->text, tp->twid);
p->scr.size.y=tp->thgt;
}
p->scr.pos.y=tp->yoffs;
pl_rtdraw(b, r, tp->text, tp->yoffs);
if(b!=p->b){
draw(p->b, p->r, b, 0, b->r.min);
freeimage(b);
pl_drawnon(tp->text, p->b);
}
pl_fixtextview(p, tp, r);
}
/*
* If t is a panel word, pass the mouse event on to it
*/
void pl_passon(Rtext *t, Mouse *m){
if(t && t->b==0 && t->p!=0) plmouse(t->p, m);
}
int pl_hittextview(Panel *p, Mouse *m){
Rtext *oldhitword, *oldhitfirst;
int hitme, oldstate;
Point ul, size;
Textview *tp;
tp=p->data;
hitme=0;
oldstate=p->state;
oldhitword=tp->hitword;
oldhitfirst=tp->hitfirst;
if(oldhitword==oldhitfirst)
pl_passon(oldhitword, m);
if(m->buttons&OUT)
p->state=UP;
else if(m->buttons&7){
tp->buttons=m->buttons;
p->state=DOWN;
ul=p->r.min;
size=subpt(p->r.max, p->r.min);
pl_interior(p->state, &ul, &size);
tp->hitword=pl_rthit(tp->text, tp->yoffs, m->xy, ul);
if(tp->hitword==0)
if(oldhitword!=0 && oldstate==DOWN)
tp->hitword=oldhitword;
else
tp->hitfirst=0;
if(tp->hitword!=0 && oldstate!=DOWN)
tp->hitfirst=tp->hitword;
}
else{
if(p->state==DOWN) hitme=1;
p->state=UP;
}
if(tp->hitfirst!=oldhitfirst || tp->hitword!=oldhitword){
pl_hilitewords(p, oldhitword, oldhitfirst, 0);
pl_hilitewords(p, tp->hitword, tp->hitfirst, 1);
if(tp->hitword==tp->hitfirst)
pl_passon(tp->hitword, m);
}
if(hitme && tp->hit && tp->hitword!=0 && tp->hitword==tp->hitfirst){
pl_hilitewords(p, tp->hitword, tp->hitfirst, 0);
tp->hit(p, tp->buttons, tp->hitword);
tp->hitword=0;
tp->hitfirst=0;
}
return 0;
}
void pl_scrolltextview(Panel *p, int dir, int buttons, int num, int den){
int yoffs;
Point ul, size;
Textview *tp;
Rectangle r;
if(dir!=VERT) return;
tp=p->data;
ul=p->r.min;
size=subpt(p->r.max, p->r.min);
pl_interior(p->state, &ul, &size);
switch(buttons){
default:
SET(yoffs);
break;
case 1: /* left -- top moves to pointer */
yoffs=(vlong)tp->yoffs-num*size.y/den;
if(yoffs<0) yoffs=0;
break;
case 2: /* middle -- absolute index of file */
yoffs=(vlong)tp->thgt*num/den;
break;
case 4: /* right -- line pointed at moves to top */
yoffs=tp->yoffs+(vlong)num*size.y/den;
if(yoffs>tp->thgt) yoffs=tp->thgt;
break;
}
if(yoffs!=tp->yoffs){
pl_hilitewords(p, tp->hitword, tp->hitfirst, 0);
r=pl_outline(p->b, p->r, p->state);
pl_rtredraw(p->b, r, tp->text, yoffs, tp->yoffs);
p->scr.pos.y=tp->yoffs=yoffs;
pl_fixtextview(p, tp, r);
}
}
void pl_typetextview(Panel *g, Rune c){
USED(g, c);
}
Point pl_getsizetextview(Panel *p, Point children){
USED(children);
return pl_boxsize(((Textview *)p->data)->minsize, p->state);
}
void pl_childspacetextview(Panel *g, Point *ul, Point *size){
USED(g, ul, size);
}
/*
* Priority depends on what thing inside the panel we're pointing at.
*/
int pl_pritextview(Panel *p, Point xy){
Point ul, size;
Textview *tp;
Rtext *h;
tp=p->data;
ul=p->r.min;
size=subpt(p->r.max, p->r.min);
pl_interior(p->state, &ul, &size);
h=pl_rthit(tp->text, tp->yoffs, xy, ul);
if(h && h->b==0 && h->p!=0){
p=pl_ptinpanel(xy, h->p);
if(p) return p->pri(p, xy);
}
return PRI_NORMAL;
}
void plinittextview(Panel *v, int flags, Point minsize, Rtext *t, void (*hit)(Panel *, int, Rtext *)){
Textview *tp;
tp=v->data;
v->flags=flags|LEAF;
v->state=UP;
v->draw=pl_drawtextview;
v->hit=pl_hittextview;
v->type=pl_typetextview;
v->getsize=pl_getsizetextview;
v->childspace=pl_childspacetextview;
v->kind="textview";
v->pri=pl_pritextview;
tp->hit=hit;
tp->minsize=minsize;
tp->text=t;
tp->yoffs=0;
tp->hitfirst=0;
tp->hitword=0;
tp->esnarf=tp->snarf=0;
v->scroll=pl_scrolltextview;
tp->twid=-1;
v->scr.pos=Pt(0,0);
v->scr.size=Pt(0,1);
}
Panel *pltextview(Panel *parent, int flags, Point minsize, Rtext *t, void (*hit)(Panel *, int, Rtext *)){
Panel *v;
v=pl_newpanel(parent, sizeof(Textview));
plinittextview(v, flags, minsize, t, hit);
return v;
}
int plgetpostextview(Panel *p){
return ((Textview *)p->data)->yoffs;
}
void plsetpostextview(Panel *p, int yoffs){
((Textview *)p->data)->yoffs=yoffs;
pldraw(p, p->b);
}
static void
snarfword(Textview *tp, Rtext *w){
char *b;
int n;
if(w->b!=0 || w->p!=0 || w->text==0)
return;
n = strlen(w->text)+4;
if((b = realloc(tp->snarf, (tp->esnarf+n) - tp->snarf)) == nil)
return;
tp->esnarf = (tp->esnarf - tp->snarf) + b;
tp->snarf = b;
if(w->space == 0)
tp->esnarf += sprint(tp->esnarf, "%s", w->text);
else if(w->space > 0)
tp->esnarf += sprint(tp->esnarf, " %s", w->text);
else if(PL_OP(w->space) == PL_TAB)
tp->esnarf += sprint(tp->esnarf, "\t%s", w->text);
if(w->nextline == w->next)
tp->esnarf += sprint(tp->esnarf, "\n");
}
char *plsnarftext(Panel *p){
Rtext *t, *s, *e;
Textview *tp;
tp=p->data;
free(tp->snarf);
tp->snarf=tp->esnarf=0;
s = tp->hitfirst;
e = tp->hitword;
if(s==0 || e==0)
return nil;
for(t=s; t!=0 && t!=e; t=t->next)
;
if(t==e){
for(t=s; t!=e; t=t->next)
snarfword(tp, t);
}else{
for(t=e; t!=s; t=t->next)
snarfword(tp, t);
}
snarfword(tp, t);
return tp->snarf;
}
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