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dmenu/dmenu.c

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/* See LICENSE file for copyright and license details. */
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#include <ctype.h>
#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 <unistd.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>
#ifdef XINERAMA
#include <X11/extensions/Xinerama.h>
#endif
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#include "draw.h"
#define INRECT(x,y,rx,ry,rw,rh) ((x) >= (rx) && (x) < (rx)+(rw) && (y) >= (ry) && (y) < (ry)+(rh))
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#define MAX(a,b) ((a) > (b) ? (a) : (b))
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typedef struct Item Item;
struct Item {
char *text;
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Item *left, *right;
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};
static void appenditem(Item *item, Item **list, Item **last);
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static void calcoffsets(void);
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static char *cistrstr(const char *s, const char *sub);
static void drawmenu(void);
static void grabkeyboard(void);
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static void insert(const char *str, ssize_t n);
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static void keypress(XKeyEvent *ev);
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static void match(void);
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static size_t nextrune(int inc);
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static void paste(void);
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static void readstdin(void);
static void run(void);
static void setup(void);
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static void usage(void);
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static char text[BUFSIZ] = "";
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static int bh, mw, mh;
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static int inputw, promptw;
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static int lines = 0;
static size_t cursor = 0;
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static const char *font = NULL;
static const char *prompt = NULL;
static const char *normbgcolor = "#cccccc";
static const char *normfgcolor = "#000000";
static const char *selbgcolor = "#0066ff";
static const char *selfgcolor = "#ffffff";
static unsigned long normcol[ColLast];
static unsigned long selcol[ColLast];
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static Atom utf8;
static Bool topbar = True;
static DC *dc;
static Item *items = NULL;
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static Item *matches, *matchend;
static Item *prev, *curr, *next, *sel;
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static Window win;
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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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int
main(int argc, char *argv[]) {
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Bool fast = False;
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int i;
for(i = 1; i < argc; i++)
/* single flags */
if(!strcmp(argv[i], "-v")) {
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puts("dmenu-"VERSION", © 2006-2011 dmenu engineers, see LICENSE for details");
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exit(EXIT_SUCCESS);
}
else if(!strcmp(argv[i], "-b"))
topbar = False;
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else if(!strcmp(argv[i], "-f"))
fast = True;
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else if(!strcmp(argv[i], "-i")) {
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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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/* double flags */
else if(!strcmp(argv[i], "-l"))
lines = atoi(argv[++i]);
else if(!strcmp(argv[i], "-p"))
prompt = argv[++i];
else if(!strcmp(argv[i], "-fn"))
font = argv[++i];
else if(!strcmp(argv[i], "-nb"))
normbgcolor = argv[++i];
else if(!strcmp(argv[i], "-nf"))
normfgcolor = argv[++i];
else if(!strcmp(argv[i], "-sb"))
selbgcolor = argv[++i];
else if(!strcmp(argv[i], "-sf"))
selfgcolor = argv[++i];
else
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usage();
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dc = initdc();
initfont(dc, font);
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if(fast) {
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grabkeyboard();
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readstdin();
}
else {
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 EXIT_FAILURE; /* unreachable */
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}
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void
appenditem(Item *item, Item **list, Item **last) {
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if(*last)
(*last)->right = item;
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else
*list = item;
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item->left = *last;
item->right = NULL;
*last = item;
}
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void
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calcoffsets(void) {
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int i, n;
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if(lines > 0)
n = lines * bh;
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else
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n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
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for(i = 0, next = curr; next; next = next->right)
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if((i += (lines > 0) ? bh : MIN(textw(dc, next->text), n)) > n)
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break;
for(i = 0, prev = curr; prev && prev->left; prev = prev->left)
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if((i += (lines > 0) ? bh : MIN(textw(dc, prev->left->text), n)) > n)
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break;
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}
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char *
cistrstr(const char *s, const char *sub) {
size_t len;
for(len = strlen(sub); *s; s++)
if(!strncasecmp(s, sub, len))
return (char *)s;
return NULL;
}
void
drawmenu(void) {
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int curpos;
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Item *item;
dc->x = 0;
dc->y = 0;
dc->h = bh;
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drawrect(dc, 0, 0, mw, mh, True, BG(dc, normcol));
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if(prompt) {
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dc->w = promptw;
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drawtext(dc, prompt, selcol);
dc->x = dc->w;
}
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dc->w = (lines > 0 || !matches) ? mw - dc->x : inputw;
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drawtext(dc, text, normcol);
if((curpos = textnw(dc, text, cursor) + dc->h/2 - 2) < dc->w)
drawrect(dc, curpos, 2, 1, dc->h - 4, True, FG(dc, normcol));
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if(lines > 0) {
dc->w = mw - dc->x;
for(item = curr; item != next; item = item->right) {
dc->y += dc->h;
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drawtext(dc, item->text, (item == sel) ? selcol : normcol);
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}
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}
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else if(matches) {
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dc->x += inputw;
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dc->w = textw(dc, "<");
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if(curr->left)
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drawtext(dc, "<", normcol);
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for(item = curr; item != next; item = item->right) {
dc->x += dc->w;
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dc->w = MIN(textw(dc, item->text), mw - dc->x - textw(dc, ">"));
drawtext(dc, item->text, (item == sel) ? selcol : normcol);
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}
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dc->w = textw(dc, ">");
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dc->x = mw - dc->w;
if(next)
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drawtext(dc, ">", normcol);
}
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mapdc(dc, win, mw, mh);
}
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void
grabkeyboard(void) {
int i;
for(i = 0; i < 1000; i++) {
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if(XGrabKeyboard(dc->dpy, DefaultRootWindow(dc->dpy), True,
GrabModeAsync, GrabModeAsync, CurrentTime) == GrabSuccess)
return;
usleep(1000);
}
eprintf("cannot grab keyboard\n");
}
void
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insert(const char *str, ssize_t n) {
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if(strlen(text) + n > sizeof text - 1)
return;
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memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
if(n > 0)
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memcpy(&text[cursor], str, n);
cursor += n;
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match();
}
void
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keypress(XKeyEvent *ev) {
char buf[32];
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KeySym ksym;
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XLookupString(ev, buf, sizeof buf, &ksym, NULL);
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if(ev->state & ControlMask) {
KeySym lower, upper;
XConvertCase(ksym, &lower, &upper);
switch(lower) {
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case XK_a: ksym = XK_Home; break;
case XK_b: ksym = XK_Left; break;
case XK_c: ksym = XK_Escape; break;
case XK_d: ksym = XK_Delete; break;
case XK_e: ksym = XK_End; break;
case XK_f: ksym = XK_Right; break;
case XK_h: ksym = XK_BackSpace; break;
case XK_i: ksym = XK_Tab; break;
case XK_j: ksym = XK_Return; break;
case XK_m: ksym = XK_Return; break;
case XK_n: ksym = XK_Up; break;
case XK_p: ksym = XK_Down; break;
case XK_k: /* delete right */
text[cursor] = '\0';
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match();
break;
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case XK_u: /* delete left */
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insert(NULL, 0 - cursor);
break;
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case XK_w: /* delete word */
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while(cursor > 0 && text[nextrune(-1)] == ' ')
insert(NULL, nextrune(-1) - cursor);
while(cursor > 0 && text[nextrune(-1)] != ' ')
insert(NULL, nextrune(-1) - cursor);
break;
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case XK_y: /* paste selection */
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XConvertSelection(dc->dpy, XA_PRIMARY, utf8, utf8, win, CurrentTime);
return;
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default:
return;
}
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}
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switch(ksym) {
default:
if(!iscntrl(*buf))
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insert(buf, strlen(buf));
break;
case XK_Delete:
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if(text[cursor] == '\0')
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)
return;
insert(NULL, nextrune(-1) - cursor);
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break;
case XK_End:
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if(text[cursor] != '\0') {
cursor = strlen(text);
break;
}
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if(next) {
curr = matchend;
calcoffsets();
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curr = prev;
calcoffsets();
while(next && (curr = curr->right))
calcoffsets();
}
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sel = matchend;
break;
case XK_Escape:
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exit(EXIT_FAILURE);
case XK_Home:
if(sel == matches) {
cursor = 0;
break;
}
sel = curr = matches;
calcoffsets();
break;
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case XK_Left:
if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
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cursor = nextrune(-1);
break;
}
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/* fallthrough */
case XK_Up:
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if(sel && sel->left && (sel = sel->left)->right == curr) {
curr = prev;
calcoffsets();
}
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break;
case XK_Next:
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if(!next)
return;
sel = curr = next;
calcoffsets();
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break;
case XK_Prior:
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if(!prev)
return;
sel = curr = prev;
calcoffsets();
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break;
case XK_Return:
case XK_KP_Enter:
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puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
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exit(EXIT_SUCCESS);
case XK_Right:
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if(text[cursor] != '\0') {
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cursor = nextrune(+1);
break;
}
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/* fallthrough */
case XK_Down:
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if(sel && sel->right && (sel = sel->right) == next) {
curr = next;
calcoffsets();
}
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break;
case XK_Tab:
if(!sel)
return;
strncpy(text, sel->text, sizeof text);
cursor = strlen(text);
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match();
break;
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}
drawmenu();
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}
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void
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match(void) {
static char **tokv = NULL;
static int tokn = 0;
char buf[sizeof text], *s;
int i, tokc = 0;
size_t len;
Item *item, *lprefix, *lsubstr, *prefixend, *substrend;
strcpy(buf, text);
for(s = strtok(buf, " "); s; tokv[tokc-1] = s, s = strtok(NULL, " "))
if(++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
eprintf("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]))
break;
if(i != tokc)
continue;
if(!tokc || !fstrncmp(tokv[0], item->text, len+1))
appenditem(item, &matches, &matchend);
else if(!fstrncmp(tokv[0], item->text, len))
appenditem(item, &lprefix, &prefixend);
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else
appenditem(item, &lsubstr, &substrend);
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}
if(lprefix) {
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if(matches) {
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matchend->right = lprefix;
lprefix->left = matchend;
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}
else
matches = lprefix;
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matchend = prefixend;
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}
if(lsubstr) {
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if(matches) {
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matchend->right = lsubstr;
lsubstr->left = matchend;
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}
else
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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size_t
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nextrune(int inc) {
ssize_t n;
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for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc);
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return n;
}
void
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paste(void) {
char *p, *q;
int di;
unsigned long dl;
Atom da;
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XGetWindowProperty(dc->dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
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insert(p, (q = strchr(p, '\n')) ? q-p : (ssize_t)strlen(p));
XFree(p);
drawmenu();
}
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void
readstdin(void) {
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char buf[sizeof text], *p, *maxstr = NULL;
size_t i, max = 0, size = 0;
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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))))
eprintf("cannot realloc %u bytes:", size);
if((p = strchr(buf, '\n')))
*p = '\0';
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if(!(items[i].text = strdup(buf)))
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eprintf("cannot strdup %u bytes:", strlen(buf)+1);
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if(strlen(items[i].text) > max)
max = strlen(maxstr = items[i].text);
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}
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if(items)
items[i].text = NULL;
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inputw = maxstr ? textw(dc, maxstr) : 0;
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lines = MIN(lines, i);
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}
void
run(void) {
XEvent ev;
while(!XNextEvent(dc->dpy, &ev))
switch(ev.type) {
case Expose:
if(ev.xexpose.count == 0)
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mapdc(dc, win, mw, mh);
break;
case KeyPress:
keypress(&ev.xkey);
break;
case SelectionNotify:
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if(ev.xselection.property == utf8)
paste();
break;
case VisibilityNotify:
if(ev.xvisibility.state != VisibilityUnobscured)
XRaiseWindow(dc->dpy, win);
break;
}
}
void
setup(void) {
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int x, y, screen = DefaultScreen(dc->dpy);
Window root = RootWindow(dc->dpy, screen);
XSetWindowAttributes swa;
#ifdef XINERAMA
int n;
XineramaScreenInfo *info;
#endif
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normcol[ColBG] = getcolor(dc, normbgcolor);
normcol[ColFG] = getcolor(dc, normfgcolor);
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selcol[ColBG] = getcolor(dc, selbgcolor);
selcol[ColFG] = getcolor(dc, selfgcolor);
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utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
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/* menu geometry */
bh = dc->font.height + 2;
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lines = MAX(lines, 0);
mh = (lines + 1) * bh;
#ifdef XINERAMA
if((info = XineramaQueryScreens(dc->dpy, &n))) {
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int i, di;
unsigned int du;
Window w, dw;
XWindowAttributes wa;
XGetInputFocus(dc->dpy, &w, &di);
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if(w != root && w != PointerRoot && w != None && XGetWindowAttributes(dc->dpy, w, &wa))
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XTranslateCoordinates(dc->dpy, w, root, wa.x, wa.y, &x, &y, &dw);
else
XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
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for(i = 0; i < n-1; i++)
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if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
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break;
x = info[i].x_org;
y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
mw = info[i].width;
XFree(info);
}
else
#endif
{
x = 0;
y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
mw = DisplayWidth(dc->dpy, screen);
}
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promptw = prompt ? textw(dc, prompt) : 0;
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inputw = MIN(inputw, mw/3);
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match();
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2010-08-05 17:41:56 +03:00
/* menu window */
swa.override_redirect = True;
swa.background_pixmap = ParentRelative;
swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
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DefaultDepth(dc->dpy, screen), CopyFromParent,
DefaultVisual(dc->dpy, screen),
CWOverrideRedirect | CWBackPixmap | CWEventMask, &swa);
XMapRaised(dc->dpy, win);
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resizedc(dc, mw, mh);
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drawmenu();
}
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void
usage(void) {
fputs("usage: dmenu [-b] [-f] [-i] [-l lines] [-p prompt] [-fn font]\n"
" [-nb color] [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
exit(EXIT_FAILURE);
}