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/*
* instr.cc -- routines to handle the instr window
*/
#include "picsim.hh"
void
instr_refresh( Widget w, XEvent *ev, String *prms, Cardinal *nprm )
{
GC gc;
XGCValues xgcv;
XFontStruct *xfsp;
Dimension w_height, w_width;
Pixmap pointer_pixmap;
char buf[32];
int i, j, k, p, dv;
XtVaGetValues( W.itext,
XtNforeground, &xgcv.foreground,
XtNbackground, &xgcv.background,
XtNheight, &w_height,
XtNwidth, &w_width,
XtNfont, &xfsp,
NULL );
xgcv.font = xfsp->fid;
gc = XCreateGC( XtDisplay(W.itext), XtWindow(W.itext),
GCForeground | GCBackground | GCFont,
&xgcv );
p = Pic.itop;
dv = xfsp->ascent + xfsp->descent;
for (i = dv; i < w_height; i += dv) {
SimAR a;
if (p > Pic.isize) {
XClearArea( XtDisplay(W.itext), XtWindow(W.itext),
0, i, w_width, w_height, False );
break;
}
a.i = p++;
a = Pic.simulate( Disassemble, a );
j = strlen( (char *)a.p );
k = XTextWidth( xfsp, (char *)a.p, j );
XDrawImageString( XtDisplay(W.itext), XtWindow(W.itext), gc,
2, i, (char *)(a.p), j );
XClearArea( XtDisplay(W.itext), XtWindow(W.itext),
2 + k, i - xfsp->ascent, w_width, dv, False );
}
XFreeGC( XtDisplay(W.itext), gc );
}
/*
* Scroll the instruction area in response to a btn1 or btn3 click
*/
void
instr_scroll( Widget w, XtPointer client_data, XtPointer position )
{
Dimension w_width, w_height;
XFontStruct *xfsp;
int dv, top, lines;
float thumb;
XtVaGetValues( W.iscroll,
XtNheight, &w_height,
NULL );
XtVaGetValues( W.itext,
XtNfont, &xfsp,
NULL );
dv = xfsp->ascent + xfsp->descent;
lines = w_height / dv;
top = Pic.itop + lines * (long)position / w_height;
if (top < 0)
top = 0;
else
if (top + lines > Pic.isize)
top = Pic.isize - lines;
if (top == Pic.itop) return; /* nothing to do */
thumb = (float)top / (float)(Pic.isize - lines);
XawScrollbarSetThumb( W.iscroll, thumb, -1.0 );
instr_jump( w, client_data, &thumb );
}
/*
* Scroll the instruction area in response to btn2 in scroll bar
*/
void
instr_jump( Widget w, XtPointer client_data, XtPointer position )
{
Dimension w_width, w_height;
XFontStruct *xfsp;
int dv, top, bottom, lines, dlines;
float thumb;
XtVaGetValues( W.iscroll,
XtNheight, &w_height,
NULL );
XtVaGetValues( W.itext,
XtNfont, &xfsp,
NULL );
dv = xfsp->ascent + xfsp->descent;
lines = w_height / dv;
top = (int)((float)(Pic.isize - lines) * *(float *)position);
ipointer_erase( );
Pic.itop = top;
ipointer_refresh( W.ipointer, NULL, NULL, NULL );
instr_refresh( W.itext, NULL, NULL, NULL );
}
static unsigned ipointer_height = 16;
/*
* Erase the instruction pointer (if it's visible)
* Return whether or not it was visible.
*/
Boolean
ipointer_erase( void )
{
Dimension w_width, w_height;
XFontStruct *xfsp;
int dv, top, bottom;
XtVaGetValues( W.itext,
XtNfont, &xfsp,
NULL );
dv = xfsp->ascent + xfsp->descent;
XtVaGetValues( W.ipointer,
XtNwidth, &w_width,
XtNheight, &w_height,
NULL );
top = (Pic.pc - Pic.itop) * dv - 1;
bottom = top + ipointer_height;
if (bottom < 0 || top > w_height) return False;
XClearArea( XtDisplay(W.ipointer), XtWindow(W.ipointer),
0, (Pic.pc - Pic.itop) * dv - 2, w_width, ipointer_height,
False );
return True;
}
void
ipointer_refresh( Widget w, XEvent *ev, String *prms, Cardinal *nprm )
{
GC gc;
XGCValues xgcv;
Dimension w_height, w_width;
static Pixmap pointer_pixmap = None;
XFontStruct *xfsp;
int dv;
XtVaGetValues( W.itext,
XtNfont, &xfsp,
NULL );
dv = xfsp->ascent + xfsp->descent;
XtVaGetValues( W.ipointer,
XtNforeground, &xgcv.foreground,
XtNbackground, &xgcv.background,
NULL );
if (pointer_pixmap == None) {
XtVaGetValues( W.ipointer,
XtNbitmap, &pointer_pixmap,
NULL );
XtVaSetValues( W.ipointer,
XtNbitmap, (XtPointer)None,
NULL );
if (pointer_pixmap != None) {
Window who_cares_win;
int who_cares_int;
u_int who_cares_unsigned;
XGetGeometry( XtDisplay(W.ipointer), pointer_pixmap,
&who_cares_win,
&who_cares_int, &who_cares_int,
&who_cares_unsigned, &ipointer_height,
&who_cares_unsigned, &who_cares_unsigned );
}
}
gc = XCreateGC( XtDisplay(W.ipointer), XtWindow(W.ipointer),
GCForeground | GCBackground,
&xgcv );
XCopyPlane( XtDisplay(W.ipointer), pointer_pixmap, XtWindow(W.ipointer),
gc, 0, 0, 16, 16, 2, (Pic.pc - Pic.itop) * dv - 1, 1 );
XFreeGC( XtDisplay(W.ipointer), gc );
}
/*
* If the instruction pointer is off-screen, scroll so that it's about
* 1/4 way down.
*/
void
ipointer_seek( Widget w, XEvent *ev, String *prms, Cardinal *nprm )
{
Dimension w_width, w_height;
XFontStruct *xfsp;
int dv, top, bottom, lines, dlines;
float thumb;
XtVaGetValues( W.iscroll,
XtNheight, &w_height,
NULL );
XtVaGetValues( W.itext,
XtNfont, &xfsp,
NULL );
dv = xfsp->ascent + xfsp->descent;
lines = w_height / dv;
if (Pic.pc >= Pic.itop && Pic.pc < Pic.itop + lines - 3) return;
top = Pic.pc - lines / 4;
if (top < 0)
top = 0;
else
if (top + lines > Pic.isize)
top = Pic.isize - lines;
ipointer_erase( );
Pic.itop = top;
ipointer_refresh( W.ipointer, NULL, NULL, NULL );
instr_refresh( W.itext, NULL, NULL, NULL );
XawScrollbarSetThumb( W.iscroll, (float)top / (float)(Pic.isize - lines),
-1.0 );
}
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