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52500: add layer token to zle attributes

Browse Source 
This provide control over the precedence of highlighting where
different regions overlap.
master
Oliver Kiddle 4 months ago
parent 3c5dacd503
commit 85545af42b
4 changed files with 88 additions and 46 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
2024-01-28 Oliver Kiddle <opk@zsh.org>
* 52500: Src/Zle/zle.h, Src/Zle/zle_refresh.c, Src/prompt.c:
add layer token to zle attributes to provide control over
the precedence of highlighting
* 52499: Src/prompt.c: support highlight groups defined in a
.zle.hlgroups associative array and referenced using %H in
prompt strings or hl= in zle_highlight/region_highlight

2
Src/Zle/zle.h
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@ -435,6 +435,8 @@ enum {
struct region_highlight {
/* Attributes turned on in the region */
zattr atr;
/* Priority for this region relative to others that overlap */
int layer;
/* Start of the region */
int start;
/* Start of the region in metafied ZLE line */

115
Src/Zle/zle_refresh.c
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@ -210,6 +210,12 @@ int predisplaylen, postdisplaylen;
static zattr default_attr, special_attr, ellipsis_attr;
/*
* Layer applied to highlighting for special characters
*/
static int special_layer;
/*
* Array of region highlights, no special termination.
* The first N_SPECIAL_HIGHLIGHTS elements describe special uses of
@ -337,6 +343,13 @@ zle_set_highlight(void)
}
}
/* Default layers */
region_highlights[0].layer = 20; /* region */
region_highlights[1].layer = 20; /* isearch */
region_highlights[2].layer = 10; /* suffix */
region_highlights[3].layer = 15; /* paste */
special_layer = 30;
if (atrs) {
for (; *atrs; atrs++) {
if (!strcmp(*atrs, "none")) {
@ -346,30 +359,34 @@ zle_set_highlight(void)
paste_attr_set = region_attr_set =
isearch_attr_set = suffix_attr_set = 1;
} else if (strpfx("default:", *atrs)) {
match_highlight(*atrs + 8, &default_attr);
match_highlight(*atrs + 8, &default_attr, NULL);
} else if (strpfx("special:", *atrs)) {
match_highlight(*atrs + 8, &special_attr);
match_highlight(*atrs + 8, &special_attr, &special_layer);
special_attr_set = 1;
} else if (strpfx("region:", *atrs)) {
match_highlight(*atrs + 7, &region_highlights[0].atr);
match_highlight(*atrs + 7, &(region_highlights[0].atr),
&(region_highlights[0].layer));
region_attr_set = 1;
} else if (strpfx("isearch:", *atrs)) {
match_highlight(*atrs + 8, &(region_highlights[1].atr));
match_highlight(*atrs + 8, &(region_highlights[1].atr),
&(region_highlights[1].layer));
isearch_attr_set = 1;
} else if (strpfx("suffix:", *atrs)) {
match_highlight(*atrs + 7, &(region_highlights[2].atr));
match_highlight(*atrs + 7, &(region_highlights[2].atr),
&(region_highlights[2].layer));
suffix_attr_set = 1;
} else if (strpfx("paste:", *atrs)) {
match_highlight(*atrs + 6, &(region_highlights[3].atr));
match_highlight(*atrs + 6, &(region_highlights[3].atr),
&(region_highlights[3].layer));
paste_attr_set = 1;
} else if (strpfx("ellipsis:", *atrs)) {
match_highlight(*atrs + 9, &ellipsis_attr);
match_highlight(*atrs + 9, &ellipsis_attr, NULL);
ellipsis_attr_set = 1;
}
}
}
/* Defaults */
/* Default attributes */
if (!special_attr_set)
special_attr = TXTSTANDOUT;
if (!region_attr_set)
@ -407,14 +424,13 @@ zle_free_highlight(void)
char **
get_region_highlight(UNUSED(Param pm))
{
int arrsize = n_region_highlights;
int arrsize = n_region_highlights - N_SPECIAL_HIGHLIGHTS;
char **retarr, **arrp;
struct region_highlight *rhp;
/* region_highlights may not have been set yet */
if (!arrsize)
if (!n_region_highlights)
return hmkarray(NULL);
arrsize -= N_SPECIAL_HIGHLIGHTS;
DPUTS(arrsize < 0, "arrsize is negative from n_region_highlights");
arrp = retarr = (char **)zhalloc((arrsize+1)*sizeof(char *));
@ -422,20 +438,18 @@ get_region_highlight(UNUSED(Param pm))
for (rhp = region_highlights + N_SPECIAL_HIGHLIGHTS;
arrsize--;
rhp++, arrp++) {
char digbuf1[DIGBUFSIZE], digbuf2[DIGBUFSIZE];
int atrlen, alloclen;
const char memo_equals[] = "memo=";
sprintf(digbuf1, "%d", rhp->start);
sprintf(digbuf2, "%d", rhp->end);
atrlen = output_highlight(rhp->atr, NULL);
alloclen = atrlen + strlen(digbuf1) + strlen(digbuf2) +
3; /* 2 spaces, 1 terminating NUL */
char digbuf[2 * DIGBUFSIZE], layerbuf[7 + DIGBUFSIZE];
int offset;
const char memo_equals[] = " memo=";
int alloclen = sprintf(digbuf, "%d %d", rhp->start, rhp->end) +
output_highlight(rhp->atr, NULL) +
2; /* space and terminating NUL */
if (rhp->flags & ZRH_PREDISPLAY)
alloclen += 2; /* "P " */
alloclen++; /* "P" */
if (rhp->layer != 10)
alloclen += sprintf(layerbuf, ",layer=%d", rhp->layer);
if (rhp->memo)
alloclen += 1 /* space */ + strlen(memo_equals) + strlen(rhp->memo);
alloclen += sizeof(memo_equals) - 1 + strlen(rhp->memo);
*arrp = (char *)zhalloc(alloclen * sizeof(char));
/*
* On input we allow a space after the flags.
@ -444,13 +458,14 @@ get_region_highlight(UNUSED(Param pm))
* into three words, and then check the first to
* see if there are flags. However, it's arguable.
*/
sprintf(*arrp, "%s%s %s ",
offset = sprintf(*arrp, "%s%s ",
(rhp->flags & ZRH_PREDISPLAY) ? "P" : "",
digbuf1, digbuf2);
(void)output_highlight(rhp->atr, *arrp + strlen(*arrp));
digbuf);
(void)output_highlight(rhp->atr, *arrp + offset);
if (rhp->layer != 10)
strcat(*arrp, layerbuf);
if (rhp->memo) {
strcat(*arrp, " ");
strcat(*arrp, memo_equals);
strcat(*arrp, rhp->memo);
}
@ -459,12 +474,10 @@ get_region_highlight(UNUSED(Param pm))
return retarr;
}
/*
* The parameter system requires the pm argument, but this
* may be NULL if called directly.
*/
/**/
void
set_region_highlight(UNUSED(Param pm), char **aval)
@ -523,7 +536,8 @@ set_region_highlight(UNUSED(Param pm), char **aval)
while (inblank(*strp))
strp++;
strp = (char*) match_highlight(strp, &rhp->atr);
rhp->layer = 10; /* default */
strp = (char*) match_highlight(strp, &rhp->atr, &rhp->layer);
while (inblank(*strp))
strp++;
@ -1180,27 +1194,40 @@ zrefresh(void)
rpms.s = nbuf[rpms.ln = 0] + lpromptw;
rpms.sen = *nbuf + winw;
for (t = tmpline, tmppos = 0; tmppos < tmpll; t++, tmppos++) {
unsigned ireg;
zattr base_attr = mixattrs(default_attr, prompt_attr);
zattr all_attr;
struct region_highlight *rhp;
int layer, nextlayer = 0;
/*
* Calculate attribute based on region.
*/
for (ireg = 0, rhp = region_highlights;
ireg < n_region_highlights;
ireg++, rhp++) {
int offset;
if (rhp->flags & ZRH_PREDISPLAY)
offset = 0; /* include predisplay in start end */
else
offset = predisplaylen; /* increment over it */
if (rhp->start + offset <= tmppos &&
tmppos < rhp->end + offset) {
base_attr = mixattrs(rhp->atr, base_attr);
do {
unsigned ireg;
layer = nextlayer;
nextlayer = special_layer;
for (ireg = 0, rhp = region_highlights;
ireg < n_region_highlights;
ireg++, rhp++) {
if (rhp->layer == layer) {
int offset;
if (rhp->flags & ZRH_PREDISPLAY)
offset = 0; /* include predisplay in start end */
else
offset = predisplaylen; /* increment over it */
if (rhp->start + offset <= tmppos &&
tmppos < rhp->end + offset) {
base_attr = mixattrs(rhp->atr, base_attr);
if (layer > special_layer)
all_attr = mixattrs(rhp->atr, all_attr);
}
} else if (rhp->layer > layer && rhp->layer < nextlayer) {
nextlayer = rhp->layer;
}
}
}
all_attr = mixattrs(special_attr, base_attr);
if (special_layer == layer) {
all_attr = mixattrs(special_attr, base_attr);
}
} while (nextlayer > layer);
if (t == scs) /* if cursor is here, remember it */
rpms.nvcs = rpms.s - nbuf[rpms.nvln = rpms.ln];

13
Src/prompt.c
Unescape Escape View File

@ -260,7 +260,7 @@ parsehighlight(char *arg, char endchar, zattr *atr)
if ((node = (Param) ht->getnode(ht, arg))) {
attrs = node->gsu.s->getfn(node);
entered = 1;
if (match_highlight(attrs, atr) == attrs)
if (match_highlight(attrs, atr, 0) == attrs)
*atr = TXT_ERROR;
} else
*atr = TXT_ERROR;
@ -1884,12 +1884,13 @@ match_colour(const char **teststrp, int is_fg, int colour)
/*
* Match a set of highlights in the given teststr.
* Set *on_var to reflect the values found.
* Set *layer to the layer
* Return a pointer to the first character not consumed.
*/
/**/
mod_export const char *
match_highlight(const char *teststr, zattr *on_var)
match_highlight(const char *teststr, zattr *on_var, int *layer)
{
int found = 1;
@ -1918,6 +1919,14 @@ match_highlight(const char *teststr, zattr *on_var)
/* skip out of range colours but keep scanning attributes */
if (atr != TXT_ERROR)
*on_var |= atr;
} else if (layer && strpfx("layer=", teststr)) {
teststr += 6;
*layer = (int) zstrtol(teststr, (char **) &teststr, 10);
if (*teststr == ',')
teststr++;
else if (*teststr && *teststr != ' ')
break;
found = 1;
} else {
for (hl = highlights; hl->name; hl++) {
if (strpfx(hl->name, teststr)) {

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