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Annotation of researchv9/jerq/src/sam/term/select.c, revision 1.1.1.1

1.1       root        1: #include "frame.h"
                      2: 
                      3: select(f)      /* when called, button1 is down and we own mouse */
                      4:        register Frame *f;
                      5: {
                      6:        Posn p0, p1, q;
                      7:        Point pt0, pt1, qt;
                      8:        selectp(f, F_XOR);
                      9:        p0=p1=charofpt(f, mouse.xy);
                     10:        pt0=ptofchar(f, p0);
                     11:        pt1=ptofchar(f, p1);
                     12:        selectf(f, pt0, pt1, F_XOR);
                     13:        do{
                     14:                q=charofpt(f, mouse.xy);
                     15:                if(p1!=q){
                     16:                        if(p0==p1)
                     17:                                selectf(f, pt0, pt1, F_XOR);
                     18:                        qt=ptofchar(f, q);
                     19:                        if(p1<q)
                     20:                                selectf(f, pt1, qt, F_XOR);
                     21:                        else
                     22:                                selectf(f, qt, pt1, F_XOR);
                     23:                        p1=q, pt1=qt;
                     24:                        if(p0==p1)
                     25:                                selectf(f, pt0, pt1, F_XOR);
                     26:                }
                     27:        }while(button1());
                     28:        if(p0<p1)
                     29:                f->p0=p0, f->p1=p1;
                     30:        else
                     31:                f->p0=p1, f->p1=p0;
                     32: }
                     33: /* it is assumed p0<=p1 and both were generated by ptofchar() */
                     34: selectf(f, p0, p1, c)
                     35:        register Frame *f;
                     36:        Point p0, p1;
                     37:        Code c;
                     38: {
                     39:        int n;
                     40:        Point q0, q1;
                     41:        p0.x--, p1.x--;
                     42:        q0=p0, q1=p1;
                     43:        q0.y+=f->font->height, q1.y+=f->font->height;
                     44:        n=(p1.y-p0.y)/f->font->height;
                     45:        if(f->b==0)
                     46:                panic("selectf b==0");
                     47:        if(p0.y==f->r.corner.y)
                     48:                return;
                     49:        if(n==0){
                     50:                if(p0.x==p1.x)
                     51:                        q1.x++;
                     52:                rectf(B, Rpt(p0, q1), c);
                     53:        }else{
                     54:                rectf(B, Rect(p0.x, p0.y, f->r.corner.x, q0.y), c);
                     55:                if(n>1)
                     56:                        rectf(B, Rect(f->r.origin.x, q0.y, f->r.corner.x, p1.y), c);
                     57:                rectf(B, Rect(f->r.origin.x, p1.y, q1.x, q1.y), c);
                     58:        }
                     59: }
                     60: selectp(f, c)
                     61:        register Frame *f;
                     62:        Code c;
                     63: {
                     64:        Point pt0, pt1;
                     65:        pt0=ptofchar(f, f->p0);
                     66:        pt1=f->p0==f->p1? pt0 : ptofchar(f, f->p1);
                     67:        selectf(f, pt0, pt1, c);
                     68: }

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