dmenu

dynamic menu
git clone git://git.suckless.org/dmenu
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commit cf0fb79cd8303f6d1089b7e919add4b0fc8d9069
parent 03cb1ec55abebb6355858f582d68e33dabcfe6f5
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Sun, 27 Sep 2015 23:57:39 +0200

dmenu: style improvements

- move main to bottom, usage above main.
- dont use variable names with function prototypes.
- space before if, for, while, etc: 'if(' -> 'if ('.

this makes the code-style more consistent

Diffstat:
dmenu.c | 417++++++++++++++++++++++++++++++++++++++++---------------------------------------
1 file changed, 213 insertions(+), 204 deletions(-)

diff --git a/dmenu.c b/dmenu.c @@ -35,16 +35,16 @@ struct Item { bool out; }; -static void appenditem(Item *item, Item **list, Item **last); +static void appenditem(Item *, Item **, Item **); static void calcoffsets(void); -static char *cistrstr(const char *s, const char *sub); +static char *cistrstr(const char *, const char *); static void cleanup(void); static void drawmenu(void); static void grabkeyboard(void); -static void insert(const char *str, ssize_t n); -static void keypress(XKeyEvent *ev); +static void insert(const char *, ssize_t); +static void keypress(XKeyEvent *); static void match(void); -static size_t nextrune(int inc); +static size_t nextrune(int); static void paste(void); static void readstdin(void); static void run(void); @@ -53,100 +53,31 @@ static void usage(void); static char text[BUFSIZ] = ""; static int bh, mw, mh; +static int sw, sh; /* X display screen geometry width, height */ static int inputw, promptw; -static size_t cursor = 0; -static Atom clip, utf8; +static size_t cursor; static Item *items = NULL; static Item *matches, *matchend; static Item *prev, *curr, *next, *sel; -static Window win; +static int mon = -1, screen; + +static Atom clip, utf8; +static Display *dpy; +static Window root, win; static XIC xic; -static int mon = -1; static ClrScheme scheme[SchemeLast]; -static Display *dpy; -static int screen; -static Window root; static Drw *drw; -static int sw, sh; /* X display screen geometry width, height */ #include "config.h" static int (*fstrncmp)(const char *, const char *, size_t) = strncmp; static char *(*fstrstr)(const char *, const char *) = strstr; -int -main(int argc, char *argv[]) { - bool fast = false; - int i; - - for(i = 1; i < argc; i++) - /* these options take no arguments */ - if(!strcmp(argv[i], "-v")) { /* prints version information */ - puts("dmenu-"VERSION", © 2006-2015 dmenu engineers, see LICENSE for details"); - exit(0); - } - else if(!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */ - topbar = false; - else if(!strcmp(argv[i], "-f")) /* grabs keyboard before reading stdin */ - fast = true; - else if(!strcmp(argv[i], "-i")) { /* case-insensitive item matching */ - fstrncmp = strncasecmp; - fstrstr = cistrstr; - } - else if(i+1 == argc) - usage(); - /* these options take one argument */ - else if(!strcmp(argv[i], "-l")) /* number of lines in vertical list */ - lines = atoi(argv[++i]); - else if(!strcmp(argv[i], "-m")) - mon = atoi(argv[++i]); - else if(!strcmp(argv[i], "-p")) /* adds prompt to left of input field */ - prompt = argv[++i]; - else if(!strcmp(argv[i], "-fn")) /* font or font set */ - fonts[0] = argv[++i]; - else if(!strcmp(argv[i], "-nb")) /* normal background color */ - normbgcolor = argv[++i]; - else if(!strcmp(argv[i], "-nf")) /* normal foreground color */ - normfgcolor = argv[++i]; - else if(!strcmp(argv[i], "-sb")) /* selected background color */ - selbgcolor = argv[++i]; - else if(!strcmp(argv[i], "-sf")) /* selected foreground color */ - selfgcolor = argv[++i]; - else - usage(); - - if(!setlocale(LC_CTYPE, "") || !XSupportsLocale()) - fputs("warning: no locale support\n", stderr); - if(!(dpy = XOpenDisplay(NULL))) - die("dmenu: cannot open display\n"); - screen = DefaultScreen(dpy); - root = RootWindow(dpy, screen); - sw = DisplayWidth(dpy, screen); - sh = DisplayHeight(dpy, screen); - drw = drw_create(dpy, screen, root, sw, sh); - drw_load_fonts(drw, fonts, LENGTH(fonts)); - if(!drw->fontcount) - die("No fonts could be loaded.\n"); - drw_setscheme(drw, &scheme[SchemeNorm]); - - if(fast) { - grabkeyboard(); - readstdin(); - } - else { - readstdin(); - grabkeyboard(); - } - setup(); - run(); - - return 1; /* unreachable */ -} - -void -appenditem(Item *item, Item **list, Item **last) { - if(*last) +static void +appenditem(Item *item, Item **list, Item **last) +{ + if (*last) (*last)->right = item; else *list = item; @@ -156,25 +87,27 @@ appenditem(Item *item, Item **list, Item **last) { *last = item; } -void -calcoffsets(void) { +static void +calcoffsets(void) +{ int i, n; - if(lines > 0) + if (lines > 0) n = lines * bh; else n = mw - (promptw + inputw + TEXTW("<") + TEXTW(">")); /* calculate which items will begin the next page and previous page */ - for(i = 0, next = curr; next; next = next->right) - if((i += (lines > 0) ? bh : MIN(TEXTW(next->text), n)) > n) + for (i = 0, next = curr; next; next = next->right) + if ((i += (lines > 0) ? bh : MIN(TEXTW(next->text), n)) > n) break; - for(i = 0, prev = curr; prev && prev->left; prev = prev->left) - if((i += (lines > 0) ? bh : MIN(TEXTW(prev->left->text), n)) > n) + for (i = 0, prev = curr; prev && prev->left; prev = prev->left) + if ((i += (lines > 0) ? bh : MIN(TEXTW(prev->left->text), n)) > n) break; } -void -cleanup(void) { +static void +cleanup(void) +{ XUngrabKey(dpy, AnyKey, AnyModifier, root); drw_clr_free(scheme[SchemeNorm].bg); drw_clr_free(scheme[SchemeNorm].fg); @@ -187,18 +120,20 @@ cleanup(void) { XCloseDisplay(dpy); } -char * -cistrstr(const char *s, const char *sub) { +static char * +cistrstr(const char *s, const char *sub) +{ size_t len; - for(len = strlen(sub); *s; s++) - if(!strncasecmp(s, sub, len)) + for (len = strlen(sub); *s; s++) + if (!strncasecmp(s, sub, len)) return (char *)s; return NULL; } -void -drawmenu(void) { +static void +drawmenu(void) +{ int curpos; Item *item; int x = 0, y = 0, h = bh, w; @@ -206,7 +141,7 @@ drawmenu(void) { drw_setscheme(drw, &scheme[SchemeNorm]); drw_rect(drw, 0, 0, mw, mh, 1, 1, 1); - if(prompt && *prompt) { + if (prompt && *prompt) { drw_setscheme(drw, &scheme[SchemeSel]); drw_text(drw, x, 0, promptw, bh, prompt, 0); x += promptw; @@ -216,41 +151,40 @@ drawmenu(void) { drw_setscheme(drw, &scheme[SchemeNorm]); drw_text(drw, x, 0, w, bh, text, 0); - if((curpos = TEXTNW(text, cursor) + bh/2 - 2) < w) { + if ((curpos = TEXTNW(text, cursor) + bh / 2 - 2) < w) { drw_setscheme(drw, &scheme[SchemeNorm]); drw_rect(drw, x + curpos + 2, 2, 1, bh - 4, 1, 1, 0); } - if(lines > 0) { + if (lines > 0) { /* draw vertical list */ w = mw - x; - for(item = curr; item != next; item = item->right) { + for (item = curr; item != next; item = item->right) { y += h; - if(item == sel) + if (item == sel) drw_setscheme(drw, &scheme[SchemeSel]); - else if(item->out) + else if (item->out) drw_setscheme(drw, &scheme[SchemeOut]); else drw_setscheme(drw, &scheme[SchemeNorm]); drw_text(drw, x, y, w, bh, item->text, 0); } - } - else if(matches) { + } else if (matches) { /* draw horizontal list */ x += inputw; w = TEXTW("<"); - if(curr->left) { + if (curr->left) { drw_setscheme(drw, &scheme[SchemeNorm]); drw_text(drw, x, 0, w, bh, "<", 0); } - for(item = curr; item != next; item = item->right) { + for (item = curr; item != next; item = item->right) { x += w; w = MIN(TEXTW(item->text), mw - x - TEXTW(">")); - if(item == sel) + if (item == sel) drw_setscheme(drw, &scheme[SchemeSel]); - else if(item->out) + else if (item->out) drw_setscheme(drw, &scheme[SchemeOut]); else drw_setscheme(drw, &scheme[SchemeNorm]); @@ -258,7 +192,7 @@ drawmenu(void) { } w = TEXTW(">"); x = mw - w; - if(next) { + if (next) { drw_setscheme(drw, &scheme[SchemeNorm]); drw_text(drw, x, 0, w, bh, ">", 0); } @@ -266,13 +200,14 @@ drawmenu(void) { drw_map(drw, win, 0, 0, mw, mh); } -void -grabkeyboard(void) { +static void +grabkeyboard(void) +{ int i; /* try to grab keyboard, we may have to wait for another process to ungrab */ - for(i = 0; i < 1000; i++) { - if(XGrabKeyboard(dpy, DefaultRootWindow(dpy), True, + for (i = 0; i < 1000; i++) { + if (XGrabKeyboard(dpy, DefaultRootWindow(dpy), True, GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess) return; usleep(1000); @@ -280,29 +215,31 @@ grabkeyboard(void) { die("cannot grab keyboard\n"); } -void -insert(const char *str, ssize_t n) { - if(strlen(text) + n > sizeof text - 1) +static void +insert(const char *str, ssize_t n) +{ + if (strlen(text) + n > sizeof text - 1) return; /* move existing text out of the way, insert new text, and update cursor */ memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0)); - if(n > 0) + if (n > 0) memcpy(&text[cursor], str, n); cursor += n; match(); } -void -keypress(XKeyEvent *ev) { +static void +keypress(XKeyEvent *ev) +{ char buf[32]; int len; KeySym ksym = NoSymbol; Status status; len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status); - if(status == XBufferOverflow) + if (status == XBufferOverflow) return; - if(ev->state & ControlMask) + if (ev->state & ControlMask) switch(ksym) { case XK_a: ksym = XK_Home; break; case XK_b: ksym = XK_Left; break; @@ -328,9 +265,9 @@ keypress(XKeyEvent *ev) { insert(NULL, 0 - cursor); break; case XK_w: /* delete word */ - while(cursor > 0 && text[nextrune(-1)] == ' ') + while (cursor > 0 && text[nextrune(-1)] == ' ') insert(NULL, nextrune(-1) - cursor); - while(cursor > 0 && text[nextrune(-1)] != ' ') + while (cursor > 0 && text[nextrune(-1)] != ' ') insert(NULL, nextrune(-1) - cursor); break; case XK_y: /* paste selection */ @@ -346,7 +283,7 @@ keypress(XKeyEvent *ev) { default: return; } - else if(ev->state & Mod1Mask) + else if (ev->state & Mod1Mask) switch(ksym) { case XK_g: ksym = XK_Home; break; case XK_G: ksym = XK_End; break; @@ -359,31 +296,31 @@ keypress(XKeyEvent *ev) { } switch(ksym) { default: - if(!iscntrl(*buf)) + if (!iscntrl(*buf)) insert(buf, len); break; case XK_Delete: - if(text[cursor] == '\0') + if (text[cursor] == '\0') return; cursor = nextrune(+1); /* fallthrough */ case XK_BackSpace: - if(cursor == 0) + if (cursor == 0) return; insert(NULL, nextrune(-1) - cursor); break; case XK_End: - if(text[cursor] != '\0') { + if (text[cursor] != '\0') { cursor = strlen(text); break; } - if(next) { + if (next) { /* jump to end of list and position items in reverse */ curr = matchend; calcoffsets(); curr = prev; calcoffsets(); - while(next && (curr = curr->right)) + while (next && (curr = curr->right)) calcoffsets(); } sel = matchend; @@ -392,7 +329,7 @@ keypress(XKeyEvent *ev) { cleanup(); exit(1); case XK_Home: - if(sel == matches) { + if (sel == matches) { cursor = 0; break; } @@ -400,27 +337,27 @@ keypress(XKeyEvent *ev) { calcoffsets(); break; case XK_Left: - if(cursor > 0 && (!sel || !sel->left || lines > 0)) { + if (cursor > 0 && (!sel || !sel->left || lines > 0)) { cursor = nextrune(-1); break; } - if(lines > 0) + if (lines > 0) return; /* fallthrough */ case XK_Up: - if(sel && sel->left && (sel = sel->left)->right == curr) { + if (sel && sel->left && (sel = sel->left)->right == curr) { curr = prev; calcoffsets(); } break; case XK_Next: - if(!next) + if (!next) return; sel = curr = next; calcoffsets(); break; case XK_Prior: - if(!prev) + if (!prev) return; sel = curr = prev; calcoffsets(); @@ -428,29 +365,29 @@ keypress(XKeyEvent *ev) { case XK_Return: case XK_KP_Enter: puts((sel && !(ev->state & ShiftMask)) ? sel->text : text); - if(!(ev->state & ControlMask)) { + if (!(ev->state & ControlMask)) { cleanup(); exit(0); } - if(sel) + if (sel) sel->out = true; break; case XK_Right: - if(text[cursor] != '\0') { + if (text[cursor] != '\0') { cursor = nextrune(+1); break; } - if(lines > 0) + if (lines > 0) return; /* fallthrough */ case XK_Down: - if(sel && sel->right && (sel = sel->right) == next) { + if (sel && sel->right && (sel = sel->right) == next) { curr = next; calcoffsets(); } break; case XK_Tab: - if(!sel) + if (!sel) return; strncpy(text, sel->text, sizeof text - 1); text[sizeof text - 1] = '\0'; @@ -461,8 +398,9 @@ keypress(XKeyEvent *ev) { drawmenu(); } -void -match(void) { +static void +match(void) +{ static char **tokv = NULL; static int tokn = 0; @@ -473,41 +411,39 @@ match(void) { strcpy(buf, text); /* separate input text into tokens to be matched individually */ - for(s = strtok(buf, " "); s; tokv[tokc-1] = s, s = strtok(NULL, " ")) - if(++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv))) + for (s = strtok(buf, " "); s; tokv[tokc - 1] = s, s = strtok(NULL, " ")) + if (++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv))) die("cannot realloc %u bytes\n", tokn * sizeof *tokv); len = tokc ? strlen(tokv[0]) : 0; matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL; - for(item = items; item && item->text; item++) { - for(i = 0; i < tokc; i++) - if(!fstrstr(item->text, tokv[i])) + for (item = items; item && item->text; item++) { + for (i = 0; i < tokc; i++) + if (!fstrstr(item->text, tokv[i])) break; - if(i != tokc) /* not all tokens match */ + if (i != tokc) /* not all tokens match */ continue; /* exact matches go first, then prefixes, then substrings */ - if(!tokc || !fstrncmp(tokv[0], item->text, len+1)) + if (!tokc || !fstrncmp(tokv[0], item->text, len + 1)) appenditem(item, &matches, &matchend); - else if(!fstrncmp(tokv[0], item->text, len)) + else if (!fstrncmp(tokv[0], item->text, len)) appenditem(item, &lprefix, &prefixend); else appenditem(item, &lsubstr, &substrend); } - if(lprefix) { - if(matches) { + if (lprefix) { + if (matches) { matchend->right = lprefix; lprefix->left = matchend; - } - else + } else matches = lprefix; matchend = prefixend; } - if(lsubstr) { - if(matches) { + if (lsubstr) { + if (matches) { matchend->right = lsubstr; lsubstr->left = matchend; - } - else + } else matches = lsubstr; matchend = substrend; } @@ -515,17 +451,20 @@ match(void) { calcoffsets(); } -size_t -nextrune(int inc) { +static size_t +nextrune(int inc) +{ ssize_t n; /* return location of next utf8 rune in the given direction (+1 or -1) */ - for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc); + for (n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc) + ; return n; } -void -paste(void) { +static void +paste(void) +{ char *p, *q; int di; unsigned long dl; @@ -534,64 +473,67 @@ paste(void) { /* we have been given the current selection, now insert it into input */ XGetWindowProperty(dpy, win, utf8, 0, (sizeof text / 4) + 1, False, utf8, &da, &di, &dl, &dl, (unsigned char **)&p); - insert(p, (q = strchr(p, '\n')) ? q-p : (ssize_t)strlen(p)); + insert(p, (q = strchr(p, '\n')) ? q - p : (ssize_t)strlen(p)); XFree(p); drawmenu(); } -void -readstdin(void) { +static void +readstdin(void) +{ char buf[sizeof text], *p, *maxstr = NULL; size_t i, max = 0, size = 0; /* read each line from stdin and add it to the item list */ - for(i = 0; fgets(buf, sizeof buf, stdin); i++) { - if(i+1 >= size / sizeof *items) - if(!(items = realloc(items, (size += BUFSIZ)))) + for (i = 0; fgets(buf, sizeof buf, stdin); i++) { + if (i + 1 >= size / sizeof *items) + if (!(items = realloc(items, (size += BUFSIZ)))) die("cannot realloc %u bytes:", size); - if((p = strchr(buf, '\n'))) + if ((p = strchr(buf, '\n'))) *p = '\0'; - if(!(items[i].text = strdup(buf))) - die("cannot strdup %u bytes:", strlen(buf)+1); + if (!(items[i].text = strdup(buf))) + die("cannot strdup %u bytes:", strlen(buf) + 1); items[i].out = false; - if(strlen(items[i].text) > max) + if (strlen(items[i].text) > max) max = strlen(maxstr = items[i].text); } - if(items) + if (items) items[i].text = NULL; inputw = maxstr ? TEXTW(maxstr) : 0; lines = MIN(lines, i); } -void -run(void) { +static void +run(void) +{ XEvent ev; - while(!XNextEvent(dpy, &ev)) { - if(XFilterEvent(&ev, win)) + while (!XNextEvent(dpy, &ev)) { + if (XFilterEvent(&ev, win)) continue; switch(ev.type) { case Expose: - if(ev.xexpose.count == 0) + if (ev.xexpose.count == 0) drw_map(drw, win, 0, 0, mw, mh); break; case KeyPress: keypress(&ev.xkey); break; case SelectionNotify: - if(ev.xselection.property == utf8) + if (ev.xselection.property == utf8) paste(); break; case VisibilityNotify: - if(ev.xvisibility.state != VisibilityUnobscured) + if (ev.xvisibility.state != VisibilityUnobscured) XRaiseWindow(dpy, win); break; } } } -void -setup(void) { +static void +setup(void) +{ int x, y; XSetWindowAttributes swa; XIM xim; @@ -619,36 +561,35 @@ setup(void) { lines = MAX(lines, 0); mh = (lines + 1) * bh; #ifdef XINERAMA - if((info = XineramaQueryScreens(dpy, &n))) { + if ((info = XineramaQueryScreens(dpy, &n))) { XGetInputFocus(dpy, &w, &di); - if(mon != -1 && mon < n) + if (mon != -1 && mon < n) i = mon; - if(!i && w != root && w != PointerRoot && w != None) { + if (!i && w != root && w != PointerRoot && w != None) { /* find top-level window containing current input focus */ do { - if(XQueryTree(dpy, (pw = w), &dw, &w, &dws, &du) && dws) + if (XQueryTree(dpy, (pw = w), &dw, &w, &dws, &du) && dws) XFree(dws); - } while(w != root && w != pw); + } while (w != root && w != pw); /* find xinerama screen with which the window intersects most */ - if(XGetWindowAttributes(dpy, pw, &wa)) - for(j = 0; j < n; j++) - if((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) { + if (XGetWindowAttributes(dpy, pw, &wa)) + for (j = 0; j < n; j++) + if ((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) { area = a; i = j; } } /* no focused window is on screen, so use pointer location instead */ - if(mon == -1 && !area && XQueryPointer(dpy, root, &dw, &dw, &x, &y, &di, &di, &du)) - for(i = 0; i < n; i++) - if(INTERSECT(x, y, 1, 1, info[i])) + if (mon == -1 && !area && XQueryPointer(dpy, root, &dw, &dw, &x, &y, &di, &di, &du)) + for (i = 0; i < n; i++) + if (INTERSECT(x, y, 1, 1, info[i])) break; x = info[i].x_org; y = info[i].y_org + (topbar ? 0 : info[i].height - mh); mw = info[i].width; XFree(info); - } - else + } else #endif { x = 0; @@ -678,9 +619,77 @@ setup(void) { drawmenu(); } -void -usage(void) { +static void +usage(void) +{ fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font] [-m monitor]\n" " [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr); exit(1); } + +int +main(int argc, char *argv[]) +{ + bool fast = false; + int i; + + for (i = 1; i < argc; i++) + /* these options take no arguments */ + if (!strcmp(argv[i], "-v")) { /* prints version information */ + puts("dmenu-"VERSION); + exit(0); + } else if (!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */ + topbar = false; + else if (!strcmp(argv[i], "-f")) /* grabs keyboard before reading stdin */ + fast = true; + else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */ + fstrncmp = strncasecmp; + fstrstr = cistrstr; + } else if (i + 1 == argc) + usage(); + /* these options take one argument */ + else if (!strcmp(argv[i], "-l")) /* number of lines in vertical list */ + lines = atoi(argv[++i]); + else if (!strcmp(argv[i], "-m")) + mon = atoi(argv[++i]); + else if (!strcmp(argv[i], "-p")) /* adds prompt to left of input field */ + prompt = argv[++i]; + else if (!strcmp(argv[i], "-fn")) /* font or font set */ + fonts[0] = argv[++i]; + else if (!strcmp(argv[i], "-nb")) /* normal background color */ + normbgcolor = argv[++i]; + else if (!strcmp(argv[i], "-nf")) /* normal foreground color */ + normfgcolor = argv[++i]; + else if (!strcmp(argv[i], "-sb")) /* selected background color */ + selbgcolor = argv[++i]; + else if (!strcmp(argv[i], "-sf")) /* selected foreground color */ + selfgcolor = argv[++i]; + else + usage(); + + if (!setlocale(LC_CTYPE, "") || !XSupportsLocale()) + fputs("warning: no locale support\n", stderr); + if (!(dpy = XOpenDisplay(NULL))) + die("cannot open display\n"); + screen = DefaultScreen(dpy); + root = RootWindow(dpy, screen); + sw = DisplayWidth(dpy, screen); + sh = DisplayHeight(dpy, screen); + drw = drw_create(dpy, screen, root, sw, sh); + drw_load_fonts(drw, fonts, LENGTH(fonts)); + if (!drw->fontcount) + die("no fonts could be loaded.\n"); + drw_setscheme(drw, &scheme[SchemeNorm]); + + if (fast) { + grabkeyboard(); + readstdin(); + } else { + readstdin(); + grabkeyboard(); + } + setup(); + run(); + + return 1; /* unreachable */ +}