dmenu/dmenu.c
2010-07-31 14:56:27 +01:00

601 lines
13 KiB
C

/* See LICENSE file for copyright and license details. */
#include <ctype.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <X11/keysym.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#ifdef XINERAMA
#include <X11/extensions/Xinerama.h>
#endif
#include <draw.h>
#include "config.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))
#define UTF8_CODEPOINT(c) (((c) & 0xc0) != 0x80)
typedef struct Item Item;
struct Item {
char *text;
Item *next; /* traverses all items */
Item *left, *right; /* traverses matching items */
};
static void appenditem(Item *item, Item **list, Item **last);
static void calcoffsetsh(void);
static void calcoffsetsv(void);
static char *cistrstr(const char *s, const char *sub);
static void drawmenu(void);
static void drawmenuh(void);
static void drawmenuv(void);
static void grabkeyboard(void);
static void insert(const char *s, ssize_t n);
static void keypress(XKeyEvent *e);
static void match(void);
static void paste(Atom atom);
static void readstdin(void);
static void run(void);
static void setup(void);
static void usage(void);
static char *prompt;
static char text[4096];
static int screen;
static size_t cursor = 0;
static unsigned int inputw = 0;
static unsigned int lines = 0;
static unsigned int mw, mh;
static unsigned int promptw = 0;
static unsigned long normcol[ColLast];
static unsigned long selcol[ColLast];
static Atom utf8;
static Bool topbar = True;
static DC dc;
static Item *allitems, *matches;
static Item *curr, *prev, *next, *sel;
static Window root, win;
static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
static char *(*fstrstr)(const char *, const char *) = strstr;
static void (*calcoffsets)(void) = calcoffsetsh;
void
appenditem(Item *item, Item **list, Item **last) {
if(!(*last))
*list = item;
else
(*last)->right = item;
item->left = *last;
item->right = NULL;
*last = item;
}
void
calcoffsetsh(void) {
unsigned int w, x;
w = promptw + inputw + textw(&dc, "<") + textw(&dc, ">");
for(x = w, next = curr; next; next = next->right)
if((x += MIN(textw(&dc, next->text), mw / 3)) > mw)
break;
for(x = w, prev = curr; prev && prev->left; prev = prev->left)
if((x += MIN(textw(&dc, prev->left->text), mw / 3)) > mw)
break;
}
void
calcoffsetsv(void) {
unsigned int i;
next = prev = curr;
for(i = 0; i < lines && next; i++)
next = next->right;
mh = (dc.font.height + 2) * (i + 1);
for(i = 0; i < lines && prev && prev->left; i++)
prev = prev->left;
}
char *
cistrstr(const char *s, const char *sub) {
int c, csub;
unsigned int len;
if(!sub)
return (char *)s;
if((c = tolower(*sub++)) != '\0') {
len = strlen(sub);
do {
do {
if((csub = *s++) == '\0')
return NULL;
}
while(tolower(csub) != c);
}
while(strncasecmp(s, sub, len) != 0);
s--;
}
return (char *)s;
}
void
drawmenu(void) {
dc.x = 0;
dc.y = 0;
dc.w = mw;
dc.h = mh;
drawbox(&dc, normcol);
dc.h = dc.font.height + 2;
dc.y = topbar ? 0 : mh - dc.h;
/* print prompt? */
if(prompt) {
dc.w = promptw;
drawbox(&dc, selcol);
drawtext(&dc, prompt, selcol);
dc.x += dc.w;
}
dc.w = mw - dc.x;
/* print input area */
if(matches && lines == 0 && textw(&dc, text) <= inputw)
dc.w = inputw;
drawtext(&dc, text, normcol);
drawline(&dc, textnw(&dc, text, cursor) + dc.h/2 - 2, 2, 1, dc.h-4, normcol);
if(lines > 0)
drawmenuv();
else if(curr && (dc.w == inputw || curr->next))
drawmenuh();
commitdraw(&dc, win);
}
void
drawmenuh(void) {
Item *item;
dc.x += inputw;
dc.w = textw(&dc, "<");
if(curr->left)
drawtext(&dc, "<", normcol);
dc.x += dc.w;
for(item = curr; item != next; item = item->right) {
dc.w = MIN(textw(&dc, item->text), mw / 3);
if(item == sel)
drawbox(&dc, selcol);
drawtext(&dc, item->text, (item == sel) ? selcol : normcol);
dc.x += dc.w;
}
dc.w = textw(&dc, ">");
dc.x = mw - dc.w;
if(next)
drawtext(&dc, ">", normcol);
}
void
drawmenuv(void) {
Item *item;
XWindowAttributes wa;
dc.y = topbar ? dc.h : 0;
dc.w = mw - dc.x;
for(item = curr; item != next; item = item->right) {
if(item == sel)
drawbox(&dc, selcol);
drawtext(&dc, item->text, (item == sel) ? selcol : normcol);
dc.y += dc.h;
}
if(!XGetWindowAttributes(dc.dpy, win, &wa))
eprintf("cannot get window attributes\n");
if(wa.height != mh)
XMoveResizeWindow(dc.dpy, win, wa.x, wa.y + (topbar ? 0 : wa.height - mh), mw, mh);
}
void
grabkeyboard(void) {
int i;
for(i = 0; i < 1000; i++) {
if(!XGrabKeyboard(dc.dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime))
return;
usleep(1000);
}
eprintf("cannot grab keyboard\n");
}
void
insert(const char *s, ssize_t n) {
memmove(text + cursor + n, text + cursor, sizeof text - cursor - n);
if(n > 0)
memcpy(text + cursor, s, n);
cursor += n;
match();
}
void
keypress(XKeyEvent *e) {
char buf[sizeof text];
int n;
size_t len;
KeySym ksym;
len = strlen(text);
XLookupString(e, buf, sizeof buf, &ksym, NULL);
if(e->state & ControlMask) {
switch(tolower(ksym)) {
default:
return;
case XK_a:
ksym = XK_Home;
break;
case XK_b:
ksym = XK_Left;
break;
case XK_c:
ksym = XK_Escape;
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:
case XK_m:
ksym = XK_Return;
break;
case XK_k: /* delete right */
text[cursor] = '\0';
break;
case XK_n:
ksym = XK_Down;
break;
case XK_p:
ksym = XK_Up;
break;
case XK_u: /* delete left */
insert(NULL, -cursor);
break;
case XK_w: /* delete word */
if(cursor == 0)
return;
n = 0;
while(cursor - n++ > 0 && text[cursor - n] == ' ');
while(cursor - n++ > 0 && text[cursor - n] != ' ');
insert(NULL, -(--n));
break;
case XK_y: /* paste selection */
XConvertSelection(dc.dpy, XA_PRIMARY, utf8, None, win, CurrentTime);
/* causes SelectionNotify event */
return;
}
}
switch(ksym) {
default:
if(!iscntrl((int)*buf))
insert(buf, MIN(strlen(buf), sizeof text - cursor));
break;
case XK_BackSpace:
if(cursor == 0)
return;
for(n = 1; cursor - n > 0 && !UTF8_CODEPOINT(text[cursor - n]); n++);
insert(NULL, -n);
break;
case XK_Delete:
if(cursor == len)
return;
for(n = 1; cursor + n < len && !UTF8_CODEPOINT(text[cursor + n]); n++);
cursor += n;
insert(NULL, -n);
break;
case XK_End:
if(cursor < len) {
cursor = len;
break;
}
while(next) {
sel = curr = next;
calcoffsets();
}
while(sel && sel->right)
sel = sel->right;
break;
case XK_Escape:
exit(EXIT_FAILURE);
case XK_Home:
if(sel == matches) {
cursor = 0;
break;
}
sel = curr = matches;
calcoffsets();
break;
case XK_Left:
if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
while(cursor-- > 0 && !UTF8_CODEPOINT(text[cursor]));
break;
}
else if(lines > 0)
return;
case XK_Up:
if(!sel || !sel->left)
return;
sel = sel->left;
if(sel->right == curr) {
curr = prev;
calcoffsets();
}
break;
case XK_Next:
if(!next)
return;
sel = curr = next;
calcoffsets();
break;
case XK_Prior:
if(!prev)
return;
sel = curr = prev;
calcoffsets();
break;
case XK_Return:
case XK_KP_Enter:
fputs(((e->state & ShiftMask) || sel) ? sel->text : text, stdout);
fflush(stdout);
exit(EXIT_SUCCESS);
case XK_Right:
if(cursor < len) {
while(cursor++ < len && !UTF8_CODEPOINT(text[cursor]));
break;
}
else if(lines > 0)
return;
case XK_Down:
if(!sel || !sel->right)
return;
sel = sel->right;
if(sel == next) {
curr = next;
calcoffsets();
}
break;
case XK_Tab:
if(!sel)
return;
strncpy(text, sel->text, sizeof text);
cursor = strlen(text);
match();
break;
}
drawmenu();
}
void
match(void) {
unsigned int len;
Item *item, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
len = strlen(text);
matches = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
for(item = allitems; item; item = item->next)
if(!fstrncmp(text, item->text, len + 1))
appenditem(item, &lexact, &exactend);
else if(!fstrncmp(text, item->text, len))
appenditem(item, &lprefix, &prefixend);
else if(fstrstr(item->text, text))
appenditem(item, &lsubstr, &substrend);
if(lexact) {
matches = lexact;
itemend = exactend;
}
if(lprefix) {
if(itemend) {
itemend->right = lprefix;
lprefix->left = itemend;
}
else
matches = lprefix;
itemend = prefixend;
}
if(lsubstr) {
if(itemend) {
itemend->right = lsubstr;
lsubstr->left = itemend;
}
else
matches = lsubstr;
}
curr = prev = next = sel = matches;
calcoffsets();
}
void
paste(Atom atom)
{
char *p, *q;
int di;
unsigned long dl;
Atom da;
XGetWindowProperty(dc.dpy, win, atom, 0, sizeof text - cursor, True,
utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
insert(p, (q = strchr(p, '\n')) ? q-p : strlen(p));
XFree(p);
drawmenu();
}
void
readstdin(void) {
char buf[sizeof text];
size_t len;
Item *item, *new;
allitems = NULL;
for(item = NULL; fgets(buf, sizeof buf, stdin); item = new) {
len = strlen(buf);
if(buf[len-1] == '\n')
buf[--len] = '\0';
if(!(new = malloc(sizeof *new)))
eprintf("cannot malloc %u bytes\n", sizeof *new);
if(!(new->text = strdup(buf)))
eprintf("cannot strdup %u bytes\n", len);
inputw = MAX(inputw, textw(&dc, new->text));
new->next = new->left = new->right = NULL;
if(item)
item->next = new;
else
allitems = new;
}
}
void
run(void) {
XEvent ev;
while(!XNextEvent(dc.dpy, &ev))
switch(ev.type) {
case Expose:
if(ev.xexpose.count == 0)
drawmenu();
break;
case KeyPress:
keypress(&ev.xkey);
break;
case SelectionNotify:
if(ev.xselection.property != None)
paste(ev.xselection.property);
break;
case VisibilityNotify:
if(ev.xvisibility.state != VisibilityUnobscured)
XRaiseWindow(dc.dpy, win);
break;
}
}
void
setup(void) {
int x, y;
#ifdef XINERAMA
int i, n;
XineramaScreenInfo *info;
#endif
XSetWindowAttributes wa;
normcol[ColBG] = getcolor(&dc, normbgcolor);
normcol[ColFG] = getcolor(&dc, normfgcolor);
selcol[ColBG] = getcolor(&dc, selbgcolor);
selcol[ColFG] = getcolor(&dc, selfgcolor);
/* input window geometry */
mh = (dc.font.height + 2) * (lines + 1);
#ifdef XINERAMA
if((info = XineramaQueryScreens(dc.dpy, &n))) {
int di;
unsigned int du;
Window dw;
XQueryPointer(dc.dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
for(i = 0; i < n; i++)
if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
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);
}
/* input window */
wa.override_redirect = True;
wa.background_pixmap = ParentRelative;
wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
win = XCreateWindow(dc.dpy, root, x, y, mw, mh, 0,
DefaultDepth(dc.dpy, screen), CopyFromParent,
DefaultVisual(dc.dpy, screen),
CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
match();
grabkeyboard();
setupdraw(&dc, win);
inputw = MIN(inputw, mw / 3);
utf8 = XInternAtom(dc.dpy, "UTF8_STRING", False);
XMapRaised(dc.dpy, win);
}
void
usage(void) {
fputs("usage: dmenu [-b] [-i] [-l <lines>] [-p <prompt>] [-fn <font>] [-nb <color>]\n"
" [-nf <color>] [-sb <color>] [-sf <color>] [-v]\n", stderr);
exit(EXIT_FAILURE);
}
int
main(int argc, char *argv[]) {
int i;
progname = "dmenu";
for(i = 1; i < argc; i++)
/* 1-arg flags */
if(!strcmp(argv[i], "-v")) {
fputs("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n", stdout);
exit(EXIT_SUCCESS);
}
else if(!strcmp(argv[i], "-b"))
topbar = False;
else if(!strcmp(argv[i], "-i")) {
fstrncmp = strncasecmp;
fstrstr = cistrstr;
}
else if(i == argc-1)
usage();
/* 2-arg flags */
else if(!strcmp(argv[i], "-l")) {
if((lines = atoi(argv[++i])) > 0)
calcoffsets = calcoffsetsv;
}
else if(!strcmp(argv[i], "-p")) {
prompt = argv[++i];
promptw = MIN(textw(&dc, prompt), mw/5);
}
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
usage();
if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
fputs("dmenu: warning: no locale support\n", stderr);
if(!(dc.dpy = XOpenDisplay(NULL)))
eprintf("cannot open display\n");
screen = DefaultScreen(dc.dpy);
root = RootWindow(dc.dpy, screen);
initfont(&dc, font);
readstdin();
setup();
run();
return EXIT_FAILURE; /* should not reach */
}