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acme: scrolling fixes + new home/end

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Home and End previously navigated between
two different window locations: the top and
the bottom of the text.  Now they include a
third waypoint: the location where typing last
happened.  Thus, in a win window, typing
	ls -l
	<home>
scrolls to the beginning of the ls -l output.
A second <home> continues to the top of the file.

Makes Send scroll always, along with writes by
external programs to +Errors.

R=r
CC=mccoyst
http://codereview.appspot.com/4830051
This commit is contained in:
Russ Cox 2011-08-02 07:44:11 -04:00
parent 67afaf385a
commit 76864eb6cd
4 changed files with 32 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

1
src/cmd/acme/dat.h
View file

@ -186,6 +186,7 @@ struct Text
Row *row;
Column *col;
uint iq1; /* last input position */
uint eq0; /* start of typing for ESC */
uint cq0; /* cache position */
int ncache; /* storage for insert */

3
src/cmd/acme/exec.c
View file

@ -960,8 +960,9 @@ sendx(Text *et, Text *t, Text *_0, int _1, int _2, Rune *_3, int _4)
if(textreadc(t, t->file->b.nc-1) != '\n'){
textinsert(t, t->file->b.nc, Lnl, 1, TRUE);
textsetselect(t, t->file->b.nc, t->file->b.nc);
textshow(t, t->q1, t->q1, 1);
}
t->iq1 = t->q1;
textshow(t, t->q1, t->q1, 1);
}
void

17
src/cmd/acme/text.c
View file

@ -379,6 +379,8 @@ textinsert(Text *t, uint q0, Rune *r, uint n, int tofile)
}
}
if(q0 < t->iq1)
t->iq1 += n;
if(q0 < t->q1)
t->q1 += n;
if(q0 < t->q0)
@ -472,6 +474,8 @@ textdelete(Text *t, uint q0, uint q1, int tofile)
}
}
}
if(t->iq1 < t->q0)
t->iq1 -= min(n, t->iq1-q0);
if(q0 < t->q0)
t->q0 -= min(n, t->q0-q0);
if(q0 < t->q1)
@ -714,10 +718,18 @@ texttype(Text *t, Rune r)
return;
case Khome:
typecommit(t);
if(t->org > t->iq1) {
q0 = textbacknl(t, t->iq1, 1);
textsetorigin(t, q0, TRUE);
} else
textshow(t, 0, 0, FALSE);
return;
case Kend:
typecommit(t);
if(t->iq1 > t->org+t->fr.nchars) {
q0 = textbacknl(t, t->iq1, 1);
textsetorigin(t, q0, TRUE);
} else
textshow(t, t->file->b.nc, t->file->b.nc, FALSE);
return;
case 0x01: /* ^A: beginning of line */
@ -771,6 +783,7 @@ texttype(Text *t, Rune r)
}
cut(t, t, nil, TRUE, TRUE, nil, 0);
textshow(t, t->q0, t->q0, 1);
t->iq1 = t->q0;
return;
case Kcmd+'v': /* %V: paste */
typecommit(t);
@ -780,6 +793,7 @@ texttype(Text *t, Rune r)
}
paste(t, t, nil, TRUE, FALSE, nil, 0);
textshow(t, t->q0, t->q1, 1);
t->iq1 = t->q1;
return;
}
if(t->q1 > t->q0){
@ -802,6 +816,7 @@ texttype(Text *t, Rune r)
textsetselect(t, t->eq0, t->q0);
if(t->ncache > 0)
typecommit(t);
t->iq1 = t->q0;
return;
case 0x08: /* ^H: erase character */
case 0x15: /* ^U: erase line */
@ -844,6 +859,7 @@ texttype(Text *t, Rune r)
}
for(i=0; i<t->file->ntext; i++)
textfill(t->file->text[i]);
t->iq1 = t->q0;
return;
case '\n':
if(t->w->autoindent){
@ -895,6 +911,7 @@ texttype(Text *t, Rune r)
textsetselect(t, t->q0+nr, t->q0+nr);
if(r=='\n' && t->w!=nil)
wincommit(t->w, t);
t->iq1 = t->q0;
}
void

12
src/cmd/acme/xfid.c
View file

@ -395,6 +395,14 @@ xfidread(Xfid *x)
winunlock(w);
}
static int
shouldscroll(Text *t, uint q0, int qid)
{
if(qid == Qcons)
return TRUE;
return t->org <= q0 && q0 <= t->org+t->fr.nchars;
}
void
xfidwrite(Xfid *x)
{
@ -510,7 +518,7 @@ xfidwrite(Xfid *x)
if(tq1 >= q0)
tq1 += nr;
textsetselect(t, tq0, tq1);
if(t->org <= q0 && q0 <= t->org+t->fr.nchars)
if(shouldscroll(t, q0, qid))
textshow(t, q0+nr, q0+nr, 0);
textscrdraw(t);
winsettag(w);
@ -568,7 +576,7 @@ xfidwrite(Xfid *x)
}
q0 = textbsinsert(t, q0, r, nr, TRUE, &nr);
textsetselect(t, t->q0, t->q1); /* insert could leave it somewhere else */
if(qid!=QWwrsel && t->org <= q0 && q0 < t->org+t->fr.nchars)
if(qid!=QWwrsel && shouldscroll(t, q0, qid))
textshow(t, q0+nr, q0+nr, 1);
textscrdraw(t);
}