inputw: improve correctness and startup performance
a massive amount of time inside readstdin() is spent trying to get the max input width and then put it into inputw, only for it to get clamped down to mw/3 inside setup(). it makes more sense to calculate inputw inside setup() once we have mw available. similar to the last patch, i see noticeable startup performance improvement: before -> after 160ms -> 60ms additionally this will take fallback fonts into account compared to the previous version, so it's not only more performant but also more correct.
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7269c5355d
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19
dmenu.c
19
dmenu.c
@ -547,8 +547,7 @@ static void
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readstdin(void)
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{
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char buf[sizeof text], *p;
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size_t i, imax = 0, size = 0;
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unsigned int tmpmax = 0;
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size_t i, size = 0;
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/* read each line from stdin and add it to the item list */
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for (i = 0; fgets(buf, sizeof buf, stdin); i++) {
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@ -560,15 +559,9 @@ readstdin(void)
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if (!(items[i].text = strdup(buf)))
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die("cannot strdup %u bytes:", strlen(buf) + 1);
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items[i].out = 0;
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drw_font_getexts(drw->fonts, buf, strlen(buf), &tmpmax, NULL);
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if (tmpmax > inputw) {
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inputw = tmpmax;
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imax = i;
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}
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}
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if (items)
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items[i].text = NULL;
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inputw = items ? TEXTW(items[imax].text) : 0;
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lines = MIN(lines, i);
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}
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@ -614,12 +607,13 @@ static void
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setup(void)
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{
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int x, y, i, j;
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unsigned int du;
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unsigned int du, tmp;
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XSetWindowAttributes swa;
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XIM xim;
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Window w, dw, *dws;
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XWindowAttributes wa;
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XClassHint ch = {"dmenu", "dmenu"};
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struct item *item;
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#ifdef XINERAMA
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XineramaScreenInfo *info;
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Window pw;
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@ -677,7 +671,12 @@ setup(void)
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mw = wa.width;
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}
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promptw = (prompt && *prompt) ? TEXTW(prompt) - lrpad / 4 : 0;
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inputw = MIN(inputw, mw/3);
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for (item = items; item && item->text; ++item) {
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if ((tmp = textw_clamp(item->text, mw/3)) > inputw) {
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if ((inputw = tmp) == mw/3)
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break;
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}
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}
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match();
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/* create menu window */
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