44c7de3dcf
- extract drawitem function (code deduplication) - fix bug where inputw was not correctly calculated from the widest item, but just from the one with the longest strlen() which is not the same. It's better now, but does not account for fallback fonts, since it would be too slow to calculate all the correct item widths on startup. - minor code style fixes (indentation, useless line breaks)
672 lines
16 KiB
C
672 lines
16 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <ctype.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include <time.h>
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#include <X11/Xlib.h>
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#include <X11/Xatom.h>
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#include <X11/Xutil.h>
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#ifdef XINERAMA
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#include <X11/extensions/Xinerama.h>
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#endif
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#include <X11/Xft/Xft.h>
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#include "drw.h"
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#include "util.h"
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/* macros */
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#define INTERSECT(x,y,w,h,r) (MAX(0, MIN((x)+(w),(r).x_org+(r).width) - MAX((x),(r).x_org)) \
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* MAX(0, MIN((y)+(h),(r).y_org+(r).height) - MAX((y),(r).y_org)))
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#define LENGTH(X) (sizeof X / sizeof X[0])
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#define TEXTW(X) (drw_fontset_getwidth(drw, (X)) + lrpad)
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/* enums */
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enum { SchemeNorm, SchemeSel, SchemeOut, SchemeLast }; /* color schemes */
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struct item {
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char *text;
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struct item *left, *right;
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int out;
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};
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static char text[BUFSIZ] = "";
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static int bh, mw, mh;
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static int sw, sh; /* X display screen geometry width, height */
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static int inputw = 0, promptw;
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static int lrpad; /* sum of left and right padding */
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static size_t cursor;
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static struct item *items = NULL;
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static struct item *matches, *matchend;
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static struct item *prev, *curr, *next, *sel;
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static int mon = -1, screen;
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static Atom clip, utf8;
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static Display *dpy;
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static Window root, win;
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static XIC xic;
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static Drw *drw;
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static Clr *scheme[SchemeLast];
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#include "config.h"
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static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
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static char *(*fstrstr)(const char *, const char *) = strstr;
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static void
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appenditem(struct item *item, struct item **list, struct item **last)
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{
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if (*last)
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(*last)->right = item;
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else
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*list = item;
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item->left = *last;
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item->right = NULL;
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*last = item;
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}
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static void
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calcoffsets(void)
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{
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int i, n;
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if (lines > 0)
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n = lines * bh;
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else
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n = mw - (promptw + inputw + TEXTW("<") + TEXTW(">"));
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/* calculate which items will begin the next page and previous page */
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for (i = 0, next = curr; next; next = next->right)
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if ((i += (lines > 0) ? bh : TEXTW(next->text)) > n)
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break;
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for (i = 0, prev = curr; prev && prev->left; prev = prev->left)
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if ((i += (lines > 0) ? bh : TEXTW(prev->left->text)) > n)
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break;
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}
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static void
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cleanup(void)
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{
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size_t i;
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XUngrabKey(dpy, AnyKey, AnyModifier, root);
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for (i = 0; i < SchemeLast; i++)
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free(scheme[i]);
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drw_free(drw);
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XSync(dpy, False);
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XCloseDisplay(dpy);
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}
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static char *
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cistrstr(const char *s, const char *sub)
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{
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size_t len;
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for (len = strlen(sub); *s; s++)
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if (!strncasecmp(s, sub, len))
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return (char *)s;
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return NULL;
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}
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static int
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drawitem(struct item *item, int x, int y, int w)
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{
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if (item == sel)
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drw_setscheme(drw, scheme[SchemeSel]);
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else if (item->out)
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drw_setscheme(drw, scheme[SchemeOut]);
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else
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drw_setscheme(drw, scheme[SchemeNorm]);
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return drw_text(drw, x, y, w, bh, lrpad / 2, item->text, 0);
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}
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static void
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drawmenu(void)
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{
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unsigned int curpos;
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struct item *item;
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int x = 0, y = 0, w;
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drw_setscheme(drw, scheme[SchemeNorm]);
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drw_rect(drw, 0, 0, mw, mh, 1, 1);
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if (prompt && *prompt) {
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drw_setscheme(drw, scheme[SchemeSel]);
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x = drw_text(drw, x, 0, promptw, bh, lrpad / 2, prompt, 0);
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}
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/* draw input field */
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w = (lines > 0 || !matches) ? mw - x : inputw;
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drw_setscheme(drw, scheme[SchemeNorm]);
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drw_text(drw, x, 0, w, bh, lrpad / 2, text, 0);
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drw_font_getexts(drw->fonts, text, cursor, &curpos, NULL);
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if ((curpos += lrpad / 2 - 1) < w) {
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drw_setscheme(drw, scheme[SchemeNorm]);
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drw_rect(drw, x + curpos, 2, 2, bh - 4, 1, 0);
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}
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if (lines > 0) {
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/* draw vertical list */
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for (item = curr; item != next; item = item->right)
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drawitem(item, x, y += bh, mw - x);
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} else if (matches) {
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/* draw horizontal list */
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x += inputw;
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w = TEXTW("<");
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if (curr->left) {
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drw_setscheme(drw, scheme[SchemeNorm]);
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drw_text(drw, x, 0, w, bh, lrpad / 2, "<", 0);
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}
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x += w;
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for (item = curr; item != next; item = item->right)
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x = drawitem(item, x, 0, MIN(TEXTW(item->text), mw - x - TEXTW(">")));
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if (next) {
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w = TEXTW(">");
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drw_setscheme(drw, scheme[SchemeNorm]);
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drw_text(drw, mw - w, 0, w, bh, lrpad / 2, ">", 0);
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}
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}
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drw_map(drw, win, 0, 0, mw, mh);
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}
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static void
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grabkeyboard(void)
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{
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struct timespec ts = { .tv_sec = 0, .tv_nsec = 1000000 };
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int i;
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/* try to grab keyboard, we may have to wait for another process to ungrab */
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for (i = 0; i < 1000; i++) {
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if (XGrabKeyboard(dpy, DefaultRootWindow(dpy), True, GrabModeAsync,
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GrabModeAsync, CurrentTime) == GrabSuccess)
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return;
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nanosleep(&ts, NULL);
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}
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die("cannot grab keyboard\n");
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}
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static void
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match(void)
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{
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static char **tokv = NULL;
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static int tokn = 0;
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char buf[sizeof text], *s;
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int i, tokc = 0;
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size_t len, textsize;
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struct item *item, *lprefix, *lsubstr, *prefixend, *substrend;
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strcpy(buf, text);
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/* separate input text into tokens to be matched individually */
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for (s = strtok(buf, " "); s; tokv[tokc - 1] = s, s = strtok(NULL, " "))
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if (++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
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die("cannot realloc %u bytes\n", tokn * sizeof *tokv);
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len = tokc ? strlen(tokv[0]) : 0;
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matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
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textsize = strlen(text);
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for (item = items; item && item->text; item++) {
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for (i = 0; i < tokc; i++)
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if (!fstrstr(item->text, tokv[i]))
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break;
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if (i != tokc) /* not all tokens match */
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continue;
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/* exact matches go first, then prefixes, then substrings */
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if (!tokc || !fstrncmp(text, item->text, textsize))
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appenditem(item, &matches, &matchend);
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else if (!fstrncmp(tokv[0], item->text, len))
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appenditem(item, &lprefix, &prefixend);
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else
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appenditem(item, &lsubstr, &substrend);
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}
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if (lprefix) {
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if (matches) {
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matchend->right = lprefix;
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lprefix->left = matchend;
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} else
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matches = lprefix;
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matchend = prefixend;
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}
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if (lsubstr) {
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if (matches) {
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matchend->right = lsubstr;
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lsubstr->left = matchend;
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} else
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matches = lsubstr;
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matchend = substrend;
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}
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curr = sel = matches;
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calcoffsets();
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}
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static void
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insert(const char *str, ssize_t n)
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{
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if (strlen(text) + n > sizeof text - 1)
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return;
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/* move existing text out of the way, insert new text, and update cursor */
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memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
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if (n > 0)
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memcpy(&text[cursor], str, n);
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cursor += n;
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match();
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}
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static size_t
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nextrune(int inc)
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{
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ssize_t n;
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/* return location of next utf8 rune in the given direction (+1 or -1) */
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for (n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc)
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;
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return n;
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}
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static void
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keypress(XKeyEvent *ev)
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{
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char buf[32];
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int len;
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KeySym ksym = NoSymbol;
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Status status;
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len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
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if (status == XBufferOverflow)
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return;
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if (ev->state & ControlMask)
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switch(ksym) {
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case XK_a: ksym = XK_Home; break;
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case XK_b: ksym = XK_Left; break;
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case XK_c: ksym = XK_Escape; break;
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case XK_d: ksym = XK_Delete; break;
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case XK_e: ksym = XK_End; break;
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case XK_f: ksym = XK_Right; break;
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case XK_g: ksym = XK_Escape; break;
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case XK_h: ksym = XK_BackSpace; break;
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case XK_i: ksym = XK_Tab; break;
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case XK_j: /* fallthrough */
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case XK_J: /* fallthrough */
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case XK_m: /* fallthrough */
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case XK_M: ksym = XK_Return; ev->state &= ~ControlMask; break;
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case XK_n: ksym = XK_Down; break;
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case XK_p: ksym = XK_Up; break;
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case XK_k: /* delete right */
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text[cursor] = '\0';
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match();
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break;
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case XK_u: /* delete left */
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insert(NULL, 0 - cursor);
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break;
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case XK_w: /* delete word */
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while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
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insert(NULL, nextrune(-1) - cursor);
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while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
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insert(NULL, nextrune(-1) - cursor);
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break;
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case XK_y: /* paste selection */
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case XK_Y:
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XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
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utf8, utf8, win, CurrentTime);
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return;
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case XK_Return:
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case XK_KP_Enter:
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break;
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case XK_bracketleft:
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cleanup();
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exit(1);
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default:
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return;
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}
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else if (ev->state & Mod1Mask)
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switch(ksym) {
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case XK_g: ksym = XK_Home; break;
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case XK_G: ksym = XK_End; break;
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case XK_h: ksym = XK_Up; break;
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case XK_j: ksym = XK_Next; break;
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case XK_k: ksym = XK_Prior; break;
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case XK_l: ksym = XK_Down; break;
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default:
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return;
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}
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switch(ksym) {
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default:
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if (!iscntrl(*buf))
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insert(buf, len);
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break;
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case XK_Delete:
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if (text[cursor] == '\0')
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return;
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cursor = nextrune(+1);
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/* fallthrough */
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case XK_BackSpace:
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if (cursor == 0)
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return;
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insert(NULL, nextrune(-1) - cursor);
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break;
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case XK_End:
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if (text[cursor] != '\0') {
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cursor = strlen(text);
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break;
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}
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if (next) {
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/* jump to end of list and position items in reverse */
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curr = matchend;
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calcoffsets();
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curr = prev;
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calcoffsets();
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while (next && (curr = curr->right))
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calcoffsets();
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}
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sel = matchend;
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break;
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case XK_Escape:
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cleanup();
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exit(1);
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case XK_Home:
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if (sel == matches) {
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cursor = 0;
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break;
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}
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sel = curr = matches;
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calcoffsets();
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break;
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case XK_Left:
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if (cursor > 0 && (!sel || !sel->left || lines > 0)) {
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cursor = nextrune(-1);
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break;
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}
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if (lines > 0)
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return;
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/* fallthrough */
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case XK_Up:
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if (sel && sel->left && (sel = sel->left)->right == curr) {
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curr = prev;
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calcoffsets();
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}
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break;
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case XK_Next:
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if (!next)
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return;
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sel = curr = next;
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calcoffsets();
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break;
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case XK_Prior:
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if (!prev)
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return;
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sel = curr = prev;
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calcoffsets();
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break;
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case XK_Return:
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case XK_KP_Enter:
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puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
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if (!(ev->state & ControlMask)) {
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cleanup();
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exit(0);
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}
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if (sel)
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sel->out = 1;
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break;
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case XK_Right:
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if (text[cursor] != '\0') {
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cursor = nextrune(+1);
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break;
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}
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if (lines > 0)
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return;
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/* fallthrough */
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case XK_Down:
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if (sel && sel->right && (sel = sel->right) == next) {
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curr = next;
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calcoffsets();
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}
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break;
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case XK_Tab:
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if (!sel)
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return;
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strncpy(text, sel->text, sizeof text - 1);
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text[sizeof text - 1] = '\0';
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cursor = strlen(text);
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match();
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break;
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}
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drawmenu();
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}
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static void
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paste(void)
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{
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char *p, *q;
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int di;
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unsigned long dl;
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Atom da;
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/* we have been given the current selection, now insert it into input */
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XGetWindowProperty(dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
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utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
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insert(p, (q = strchr(p, '\n')) ? q - p : (ssize_t)strlen(p));
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XFree(p);
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drawmenu();
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}
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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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/* 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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if (i + 1 >= size / sizeof *items)
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if (!(items = realloc(items, (size += BUFSIZ))))
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die("cannot realloc %u bytes:", size);
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if ((p = strchr(buf, '\n')))
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*p = '\0';
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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 = TEXTW(items[imax].text);
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lines = MIN(lines, i);
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}
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static void
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run(void)
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{
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XEvent ev;
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while (!XNextEvent(dpy, &ev)) {
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if (XFilterEvent(&ev, win))
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continue;
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switch(ev.type) {
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case Expose:
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if (ev.xexpose.count == 0)
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drw_map(drw, win, 0, 0, mw, mh);
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break;
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case KeyPress:
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keypress(&ev.xkey);
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break;
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case SelectionNotify:
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if (ev.xselection.property == utf8)
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paste();
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break;
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case VisibilityNotify:
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if (ev.xvisibility.state != VisibilityUnobscured)
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XRaiseWindow(dpy, win);
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break;
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}
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}
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}
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static void
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setup(void)
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{
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int x, y;
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XSetWindowAttributes swa;
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XIM xim;
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#ifdef XINERAMA
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XineramaScreenInfo *info;
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Window w, pw, dw, *dws;
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XWindowAttributes wa;
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int a, j, di, n, i = 0, area = 0;
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unsigned int du;
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#endif
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/* init appearance */
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scheme[SchemeNorm] = drw_scm_create(drw, colors[SchemeNorm], 2);
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scheme[SchemeSel] = drw_scm_create(drw, colors[SchemeSel], 2);
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scheme[SchemeOut] = drw_scm_create(drw, colors[SchemeOut], 2);
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clip = XInternAtom(dpy, "CLIPBOARD", False);
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utf8 = XInternAtom(dpy, "UTF8_STRING", False);
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/* calculate menu geometry */
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bh = drw->fonts->h + 2;
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lines = MAX(lines, 0);
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mh = (lines + 1) * bh;
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#ifdef XINERAMA
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if ((info = XineramaQueryScreens(dpy, &n))) {
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XGetInputFocus(dpy, &w, &di);
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if (mon != -1 && mon < n)
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i = mon;
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else if (w != root && w != PointerRoot && w != None) {
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/* find top-level window containing current input focus */
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do {
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if (XQueryTree(dpy, (pw = w), &dw, &w, &dws, &du) && dws)
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XFree(dws);
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} while (w != root && w != pw);
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/* find xinerama screen with which the window intersects most */
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if (XGetWindowAttributes(dpy, pw, &wa))
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for (j = 0; j < n; j++)
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if ((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) {
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area = a;
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i = j;
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}
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}
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/* no focused window is on screen, so use pointer location instead */
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if (mon == -1 && !area && XQueryPointer(dpy, root, &dw, &dw, &x, &y, &di, &di, &du))
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for (i = 0; i < n; i++)
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if (INTERSECT(x, y, 1, 1, info[i]))
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break;
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x = info[i].x_org;
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y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
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mw = info[i].width;
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XFree(info);
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} else
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#endif
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{
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x = 0;
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y = topbar ? 0 : sh - mh;
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mw = sw;
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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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match();
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/* create menu window */
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swa.override_redirect = True;
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swa.background_pixel = scheme[SchemeNorm][ColBg].pixel;
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swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
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win = XCreateWindow(dpy, root, x, y, mw, mh, 0,
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DefaultDepth(dpy, screen), CopyFromParent,
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DefaultVisual(dpy, screen),
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CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
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/* open input methods */
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xim = XOpenIM(dpy, NULL, NULL, NULL);
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xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
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XNClientWindow, win, XNFocusWindow, win, NULL);
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XMapRaised(dpy, win);
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drw_resize(drw, mw, mh);
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drawmenu();
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}
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static void
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usage(void)
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{
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fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font] [-m monitor]\n"
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" [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
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exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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int i, fast = 0;
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for (i = 1; i < argc; i++)
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/* these options take no arguments */
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if (!strcmp(argv[i], "-v")) { /* prints version information */
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puts("dmenu-"VERSION);
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exit(0);
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} else if (!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */
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topbar = 0;
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else if (!strcmp(argv[i], "-f")) /* grabs keyboard before reading stdin */
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fast = 1;
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else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
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fstrncmp = strncasecmp;
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fstrstr = cistrstr;
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} else if (i + 1 == argc)
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usage();
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/* these options take one argument */
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else if (!strcmp(argv[i], "-l")) /* number of lines in vertical list */
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lines = atoi(argv[++i]);
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else if (!strcmp(argv[i], "-m"))
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mon = atoi(argv[++i]);
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else if (!strcmp(argv[i], "-p")) /* adds prompt to left of input field */
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prompt = argv[++i];
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else if (!strcmp(argv[i], "-fn")) /* font or font set */
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fonts[0] = argv[++i];
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else if (!strcmp(argv[i], "-nb")) /* normal background color */
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colors[SchemeNorm][ColBg] = argv[++i];
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else if (!strcmp(argv[i], "-nf")) /* normal foreground color */
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colors[SchemeNorm][ColFg] = argv[++i];
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else if (!strcmp(argv[i], "-sb")) /* selected background color */
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colors[SchemeSel][ColBg] = argv[++i];
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else if (!strcmp(argv[i], "-sf")) /* selected foreground color */
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colors[SchemeSel][ColFg] = argv[++i];
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else
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usage();
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if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
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fputs("warning: no locale support\n", stderr);
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if (!(dpy = XOpenDisplay(NULL)))
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die("cannot open display\n");
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screen = DefaultScreen(dpy);
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root = RootWindow(dpy, screen);
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sw = DisplayWidth(dpy, screen);
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sh = DisplayHeight(dpy, screen);
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drw = drw_create(dpy, screen, root, sw, sh);
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if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
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die("no fonts could be loaded.\n");
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lrpad = drw->fonts->h;
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if (fast) {
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grabkeyboard();
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readstdin();
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} else {
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readstdin();
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grabkeyboard();
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}
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setup();
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run();
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return 1; /* unreachable */
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}
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