298 lines
6.8 KiB
C
298 lines
6.8 KiB
C
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/*
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* Interface includes:
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* void plescroll(Panel *p, int top);
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* move the given character position onto the top line
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* void plegetsel(Panel *p, int *sel0, int *sel1);
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* read the selection back
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* int plelen(Panel *p);
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* read the length of the text back
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* Rune *pleget(Panel *p);
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* get a pointer to the text
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* void plesel(Panel *p, int sel0, int sel1);
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* set the selection -- adjusts hiliting
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* void plepaste(Panel *p, Rune *text, int ntext);
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* replace the selection with the given text
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*/
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#include <u.h>
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#include <libc.h>
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#include <draw.h>
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#include <event.h>
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#include <panel.h>
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#include "pldefs.h"
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#include <keyboard.h>
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typedef struct Edit Edit;
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struct Edit{
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Point minsize;
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void (*hit)(Panel *);
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int sel0, sel1;
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Textwin *t;
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Rune *text;
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int ntext;
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};
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void pl_drawedit(Panel *p){
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Edit *ep;
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Panel *sb;
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ep=p->data;
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if(ep->t==0){
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ep->t=twnew(p->b, font, ep->text, ep->ntext);
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if(ep->t==0){
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fprint(2, "pl_drawedit: can't allocate\n");
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exits("no mem");
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}
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}
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ep->t->b=p->b;
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twreshape(ep->t, p->r);
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twhilite(ep->t, ep->sel0, ep->sel1, 1);
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sb=p->yscroller;
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if(sb && sb->setscrollbar)
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sb->setscrollbar(sb, ep->t->top, ep->t->bot, ep->t->etext-ep->t->text);
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}
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char *pl_snarfedit(Panel *p){
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int s0, s1;
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Rune *t;
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t=pleget(p);
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plegetsel(p, &s0, &s1);
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if(t==0 || s0>=s1)
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return nil;
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return smprint("%.*S", s1-s0, t+s0);
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}
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void pl_pasteedit(Panel *p, char *s){
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Rune *t;
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if(t=runesmprint("%s", s)){
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plepaste(p, t, runestrlen(t));
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free(t);
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}
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}
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/*
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* Should do double-clicks:
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* If ep->sel0==ep->sel1 on entry and the
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* call to twselect returns the same selection, then
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* expand selections (| marks possible selection points, ... is expanded selection)
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* <|...|> <> must nest
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* (|...|) () must nest
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* [|...|] [] must nest
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* {|...|} {} must nest
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* '|...|' no ' in ...
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* "|...|" no " in ...
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* \n|...|\n either newline may be the corresponding end of text
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* include the trailing newline in the selection
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* ...|I... I and ... are characters satisfying pl_idchar(I)
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* ...I|
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*/
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int pl_hitedit(Panel *p, Mouse *m){
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Edit *ep;
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ep=p->data;
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if(ep->t && m->buttons&1){
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plgrabkb(p);
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ep->t->b=p->b;
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twhilite(ep->t, ep->sel0, ep->sel1, 0);
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twselect(ep->t, m);
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ep->sel0=ep->t->sel0;
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ep->sel1=ep->t->sel1;
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if((m->buttons&7)==3){
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plsnarf(p);
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plepaste(p, 0, 0); /* cut */
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}
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else if((m->buttons&7)==5)
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plpaste(p);
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else if(ep->hit)
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(*ep->hit)(p);
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}
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return 0;
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}
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void pl_scrolledit(Panel *p, int dir, int buttons, int num, int den){
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Edit *ep;
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Textwin *t;
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Panel *sb;
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int index, nline;
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if(dir!=VERT) return;
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ep=p->data;
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t=ep->t;
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if(t==0) return;
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t->b=p->b;
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switch(buttons){
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default:
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return;
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case 1: /* top line moves to mouse position */
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nline=(t->r.max.y-t->r.min.y)/t->hgt*num/den;
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index=t->top;
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while(index!=0 && nline!=0)
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if(t->text[--index]=='\n') --nline;
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break;
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case 2: /* absolute */
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index=(t->etext-t->text)*num/den;
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break;
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case 4: /* mouse points at new top line */
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index=twpt2rune(t,
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Pt(t->r.min.x, t->r.min.y+(t->r.max.y-t->r.min.y)*num/den));
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break;
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}
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while(index!=0 && t->text[index-1]!='\n') --index;
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if(index!=t->top){
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twhilite(ep->t, ep->sel0, ep->sel1, 0);
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twscroll(t, index);
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p->scr.pos.y=t->top;
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twhilite(ep->t, ep->sel0, ep->sel1, 1);
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sb=p->yscroller;
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if(sb && sb->setscrollbar)
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sb->setscrollbar(sb, t->top, t->bot, t->etext-t->text);
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}
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}
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void pl_typeedit(Panel *p, Rune c){
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Edit *ep;
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Textwin *t;
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int bot, scrolled;
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Panel *sb;
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ep=p->data;
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t=ep->t;
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if(t==0) return;
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t->b=p->b;
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twhilite(t, ep->sel0, ep->sel1, 0);
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switch(c){
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case Kesc:
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plsnarf(p);
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plepaste(p, 0, 0); /* cut */
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break;
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case Kdel: /* clear */
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ep->sel0=0;
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ep->sel1=plelen(p);
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plepaste(p, 0, 0); /* cut */
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break;
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case Kbs: /* ^H: erase character */
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if(ep->sel0!=0) --ep->sel0;
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twreplace(t, ep->sel0, ep->sel1, 0, 0);
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break;
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case Knack: /* ^U: erase line */
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while(ep->sel0!=0 && t->text[ep->sel0-1]!='\n') --ep->sel0;
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twreplace(t, ep->sel0, ep->sel1, 0, 0);
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break;
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case Ketb: /* ^W: erase word */
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while(ep->sel0!=0 && !pl_idchar(t->text[ep->sel0-1])) --ep->sel0;
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while(ep->sel0!=0 && pl_idchar(t->text[ep->sel0-1])) --ep->sel0;
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twreplace(t, ep->sel0, ep->sel1, 0, 0);
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break;
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default:
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if((c & 0xFF00) == KF || (c & 0xFF00) == Spec)
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break;
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twreplace(t, ep->sel0, ep->sel1, &c, 1);
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++ep->sel0;
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break;
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}
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ep->sel1=ep->sel0;
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/*
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* Scroll up until ep->sel0 is above t->bot.
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*/
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scrolled=0;
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do{
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bot=t->bot;
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if(ep->sel0<=bot) break;
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twscroll(t, twpt2rune(t, Pt(t->r.min.x, t->r.min.y+font->height)));
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scrolled++;
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}while(bot!=t->bot);
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if(scrolled){
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sb=p->yscroller;
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if(sb && sb->setscrollbar)
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sb->setscrollbar(sb, t->top, t->bot, t->etext-t->text);
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}
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twhilite(t, ep->sel0, ep->sel1, 1);
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}
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Point pl_getsizeedit(Panel *p, Point children){
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USED(children);
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return pl_boxsize(((Edit *)p->data)->minsize, p->state);
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}
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void pl_childspaceedit(Panel *g, Point *ul, Point *size){
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USED(g, ul, size);
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}
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void pl_freeedit(Panel *p){
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Edit *ep;
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ep=p->data;
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if(ep->t) twfree(ep->t);
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ep->t=0;
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}
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void plinitedit(Panel *v, int flags, Point minsize, Rune *text, int ntext, void (*hit)(Panel *)){
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Edit *ep;
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ep=v->data;
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v->flags=flags|LEAF;
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v->state=UP;
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v->draw=pl_drawedit;
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v->hit=pl_hitedit;
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v->type=pl_typeedit;
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v->getsize=pl_getsizeedit;
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v->childspace=pl_childspaceedit;
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v->free=pl_freeedit;
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v->snarf=pl_snarfedit;
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v->paste=pl_pasteedit;
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v->kind="edit";
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ep->hit=hit;
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ep->minsize=minsize;
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ep->text=text;
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ep->ntext=ntext;
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if(ep->t!=0) twfree(ep->t);
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ep->t=0;
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ep->sel0=-1;
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ep->sel1=-1;
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v->scroll=pl_scrolledit;
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v->scr.pos=Pt(0,0);
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v->scr.size=Pt(ntext,0);
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}
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Panel *pledit(Panel *parent, int flags, Point minsize, Rune *text, int ntext, void (*hit)(Panel *)){
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Panel *v;
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v=pl_newpanel(parent, sizeof(Edit));
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((Edit *)v->data)->t=0;
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plinitedit(v, flags, minsize, text, ntext, hit);
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return v;
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}
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void plescroll(Panel *p, int top){
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Textwin *t;
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t=((Edit*)p->data)->t;
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if(t) twscroll(t, top);
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}
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void plegetsel(Panel *p, int *sel0, int *sel1){
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Edit *ep;
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ep=p->data;
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*sel0=ep->sel0;
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*sel1=ep->sel1;
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}
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int plelen(Panel *p){
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Textwin *t;
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t=((Edit*)p->data)->t;
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if(t==0) return 0;
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return t->etext-t->text;
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}
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Rune *pleget(Panel *p){
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Textwin *t;
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t=((Edit*)p->data)->t;
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if(t==0) return 0;
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return t->text;
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}
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void plesel(Panel *p, int sel0, int sel1){
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Edit *ep;
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ep=p->data;
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if(ep->t==0) return;
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ep->t->b=p->b;
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twhilite(ep->t, ep->sel0, ep->sel1, 0);
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ep->sel0=sel0;
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ep->sel1=sel1;
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twhilite(ep->t, ep->sel0, ep->sel1, 1);
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}
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void plepaste(Panel *p, Rune *text, int ntext){
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Edit *ep;
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ep=p->data;
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if(ep->t==0) return;
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ep->t->b=p->b;
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twhilite(ep->t, ep->sel0, ep->sel1, 0);
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twreplace(ep->t, ep->sel0, ep->sel1, text, ntext);
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ep->sel1=ep->sel0+ntext;
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twhilite(ep->t, ep->sel0, ep->sel1, 1);
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p->scr.size.y=ep->t->etext-ep->t->text;
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p->scr.pos.y=ep->t->top;
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}
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void plemove(Panel *p, Point d){
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Edit *ep;
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ep=p->data;
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if(ep->t && !eqpt(d, Pt(0,0))) twmove(ep->t, d);
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}
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