dmenu/dmenu.c

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C
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/* 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 <stdarg.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 <unistd.h>
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#include <X11/keysym.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
#ifdef XINERAMA
#include <X11/extensions/Xinerama.h>
#endif
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/* macros */
#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask))
#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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#define IS_UTF8_1ST_CHAR(c) ((((c) & 0xc0) == 0xc0) || !((c) & 0x80))
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/* enums */
enum { ColFG, ColBG, ColLast };
/* typedefs */
typedef struct {
int x, y, w, h;
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unsigned long norm[ColLast];
unsigned long sel[ColLast];
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Drawable drawable;
GC gc;
struct {
XFontStruct *xfont;
XFontSet set;
int ascent;
int descent;
int height;
} font;
} DC; /* draw context */
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typedef struct Item Item;
struct Item {
char *text;
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Item *next; /* traverses all items */
Item *left, *right; /* traverses items matching current search pattern */
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};
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/* forward declarations */
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static void appenditem(Item *i, Item **list, Item **last);
static void calcoffsetsh(void);
static void calcoffsetsv(void);
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static char *cistrstr(const char *s, const char *sub);
static void cleanup(void);
static void drawcursor(void);
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static void drawmenu(void);
static void drawmenuh(void);
static void drawmenuv(void);
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static void drawtext(const char *text, unsigned long col[ColLast]);
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static void eprint(const char *errstr, ...);
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static unsigned long getcolor(const char *colstr);
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static Bool grabkeyboard(void);
static void initfont(const char *fontstr);
static void kpress(XKeyEvent * e);
static void match(char *pattern);
static void readstdin(void);
static void run(void);
static void setup(Bool topbar);
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static int textnw(const char *text, unsigned int len);
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static int textw(const char *text);
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#include "config.h"
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/* variables */
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static char *maxname = NULL;
static char *prompt = NULL;
static char text[4096];
static int cmdw = 0;
static int promptw = 0;
static int ret = 0;
static int cursor = 0;
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static int screen;
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static unsigned int mw, mh;
static unsigned int numlockmask = 0;
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static Bool running = True;
static Display *dpy;
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static DC dc;
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static Item *allitems = NULL; /* first of all items */
static Item *item = NULL; /* first of pattern matching items */
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static Item *sel = NULL;
static Item *next = NULL;
static Item *prev = NULL;
static Item *curr = NULL;
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static Window parent, win;
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static int (*fstrncmp)(const char *, const char *, size_t n) = strncmp;
static char *(*fstrstr)(const char *, const char *) = strstr;
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static unsigned int lines = 0;
static void (*calcoffsets)(void) = calcoffsetsh;
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void
appenditem(Item *i, Item **list, Item **last) {
if(!(*last))
*list = i;
else
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(*last)->right = i;
i->left = *last;
i->right = NULL;
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*last = i;
}
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void
calcoffsetsh(void) {
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int tw;
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unsigned int w;
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if(!curr)
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return;
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w = promptw + cmdw + 2 * spaceitem;
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for(next = curr; next; next=next->right) {
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tw = MIN(textw(next->text), mw / 3);
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w += tw;
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if(w > mw)
break;
}
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w = promptw + cmdw + 2 * spaceitem;
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for(prev = curr; prev && prev->left; prev=prev->left) {
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tw = MIN(textw(prev->left->text), mw / 3);
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w += tw;
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if(w > mw)
break;
}
}
void
calcoffsetsv(void) {
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static unsigned int h;
if(!curr)
return;
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h = (dc.font.height + 2) * (lines + 1);
for(next = curr; next; next=next->right) {
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h -= dc.font.height + 2;
if(h <= 0)
break;
}
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h = (dc.font.height + 2) * (lines + 1);
for(prev = curr; prev && prev->left; prev=prev->left) {
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h -= dc.font.height + 2;
if(h <= 0)
break;
}
}
char *
cistrstr(const char *s, const char *sub) {
int c, csub;
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unsigned int len;
if(!sub)
return (char *)s;
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if((c = *sub++) != '\0') {
c = tolower(c);
len = strlen(sub);
do {
do {
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if((csub = *s++) == '\0')
return NULL;
}
while(tolower(csub) != c);
}
while(strncasecmp(s, sub, len) != 0);
s--;
}
return (char *)s;
}
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void
cleanup(void) {
Item *itm;
while(allitems) {
itm = allitems->next;
free(allitems->text);
free(allitems);
allitems = itm;
}
if(dc.font.set)
XFreeFontSet(dpy, dc.font.set);
else
XFreeFont(dpy, dc.font.xfont);
XFreePixmap(dpy, dc.drawable);
XFreeGC(dpy, dc.gc);
XDestroyWindow(dpy, win);
XUngrabKeyboard(dpy, CurrentTime);
}
void
drawcursor(void) {
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XRectangle r = { dc.x, dc.y + 2, 1, dc.font.height - 2 };
r.x += textnw(text, cursor) + dc.font.height / 2;
XSetForeground(dpy, dc.gc, dc.norm[ColFG]);
XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
}
void
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drawmenu(void) {
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dc.x = 0;
dc.y = 0;
dc.w = mw;
dc.h = mh;
drawtext(NULL, dc.norm);
/* print prompt? */
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if(prompt) {
dc.w = promptw;
drawtext(prompt, dc.sel);
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dc.x += dc.w;
}
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dc.w = mw - dc.x;
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/* print command */
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if(cmdw && item && lines == 0)
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dc.w = cmdw;
drawtext(text[0] ? text : NULL, dc.norm);
drawcursor();
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if(curr) {
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if(lines > 0)
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drawmenuv();
else
drawmenuh();
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}
XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
XFlush(dpy);
}
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void
drawmenuh(void) {
Item *i;
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dc.x += cmdw;
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dc.w = spaceitem;
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drawtext(curr->left ? "<" : NULL, dc.norm);
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dc.x += dc.w;
for(i = curr; i != next; i=i->right) {
dc.w = MIN(textw(i->text), mw / 3);
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drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
dc.x += dc.w;
}
dc.w = spaceitem;
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dc.x = mw - dc.w;
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drawtext(next ? ">" : NULL, dc.norm);
}
void
drawmenuv(void) {
Item *i;
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dc.w = mw - dc.x;
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dc.y += dc.font.height + 2;
for(i = curr; i != next; i=i->right) {
drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
dc.y += dc.font.height + 2;
}
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drawtext(NULL, dc.norm);
}
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void
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drawtext(const char *text, unsigned long col[ColLast]) {
char buf[256];
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int i, x, y, h, len, olen;
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XRectangle r = { dc.x, dc.y, dc.w, dc.h };
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XSetForeground(dpy, dc.gc, col[ColBG]);
XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
if(!text)
return;
olen = strlen(text);
h = dc.font.height;
y = dc.y + ((h+2) / 2) - (h / 2) + dc.font.ascent;
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x = dc.x + (h / 2);
/* shorten text if necessary */
for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
if(!len)
return;
memcpy(buf, text, len);
if(len < olen)
for(i = len; i && i > len - 3; buf[--i] = '.');
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XSetForeground(dpy, dc.gc, col[ColFG]);
if(dc.font.set)
XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
else
XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
}
void
eprint(const char *errstr, ...) {
va_list ap;
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
exit(EXIT_FAILURE);
}
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unsigned long
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getcolor(const char *colstr) {
Colormap cmap = DefaultColormap(dpy, screen);
XColor color;
if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
eprint("error, cannot allocate color '%s'\n", colstr);
return color.pixel;
}
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Bool
grabkeyboard(void) {
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unsigned int len;
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for(len = 1000; len; len--) {
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if(XGrabKeyboard(dpy, parent, True, GrabModeAsync, GrabModeAsync, CurrentTime)
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== GrabSuccess)
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break;
usleep(1000);
}
return len > 0;
}
void
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initfont(const char *fontstr) {
char *def, **missing;
int i, n;
if(!fontstr || fontstr[0] == '\0')
eprint("error, cannot load font: '%s'\n", fontstr);
missing = NULL;
dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
if(missing)
XFreeStringList(missing);
if(dc.font.set) {
XFontStruct **xfonts;
char **font_names;
dc.font.ascent = dc.font.descent = 0;
n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
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for(i = 0; i < n; i++) {
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dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
dc.font.descent = MAX(dc.font.descent, (*xfonts)->descent);
xfonts++;
}
}
else {
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if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
&& !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
eprint("error, cannot load font: '%s'\n", fontstr);
dc.font.ascent = dc.font.xfont->ascent;
dc.font.descent = dc.font.xfont->descent;
}
dc.font.height = dc.font.ascent + dc.font.descent;
}
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void
kpress(XKeyEvent * e) {
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char buf[sizeof text];
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int i, num, off;
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unsigned int len;
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KeySym ksym;
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len = strlen(text);
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buf[0] = '\0';
num = XLookupString(e, buf, sizeof buf, &ksym, NULL);
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if(IsKeypadKey(ksym)) {
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if(ksym == XK_KP_Enter)
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ksym = XK_Return;
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else if(ksym >= XK_KP_0 && ksym <= XK_KP_9)
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ksym = (ksym - XK_KP_0) + XK_0;
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}
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if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
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|| IsMiscFunctionKey(ksym) || IsPFKey(ksym)
|| IsPrivateKeypadKey(ksym))
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return;
/* first check if a control mask is omitted */
if(e->state & ControlMask) {
switch (ksym) {
default: /* ignore other control sequences */
return;
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case XK_a:
case XK_A:
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ksym = XK_Home;
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break;
case XK_c:
case XK_C:
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ksym = XK_Escape;
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break;
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case XK_e:
case XK_E:
ksym = XK_End;
break;
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case XK_h:
case XK_H:
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ksym = XK_BackSpace;
break;
case XK_i:
case XK_I:
ksym = XK_Tab;
break;
case XK_j:
case XK_J:
ksym = XK_Return;
break;
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case XK_u:
case XK_U:
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memmove(text, text + cursor, sizeof text - cursor + 1);
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cursor = 0;
match(text);
break;
case XK_w:
case XK_W:
if(cursor > 0) {
i = cursor;
while(i-- > 0 && text[i] == ' ');
while(i-- > 0 && text[i] != ' ');
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memmove(text + i + 1, text + cursor, sizeof text - cursor + 1);
cursor = i + 1;
match(text);
}
break;
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}
}
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if(CLEANMASK(e->state) & Mod1Mask) {
switch(ksym) {
default: return;
case XK_h:
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ksym = XK_Left;
break;
case XK_l:
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ksym = XK_Right;
break;
case XK_j:
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ksym = XK_Next;
break;
case XK_k:
ksym = XK_Prior;
break;
case XK_g:
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ksym = XK_Home;
break;
case XK_G:
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ksym = XK_End;
break;
case XK_p:
{
FILE *fp;
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char *s;
if(!(fp = (FILE*)popen("sselp", "r")))
eprint("dmenu: Could not popen sselp\n");
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s = fgets(buf, sizeof buf, fp);
pclose(fp);
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if(s == NULL)
return;
}
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num = strlen(buf);
if(num && buf[num-1] == '\n')
buf[--num] = '\0';
break;
}
}
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switch(ksym) {
default:
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num = MIN(num, sizeof text - cursor);
if(num && !iscntrl((int) buf[0])) {
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memmove(text + cursor + num, text + cursor, sizeof text - cursor - num);
memcpy(text + cursor, buf, num);
cursor+=num;
match(text);
}
break;
case XK_BackSpace:
if(cursor > 0) {
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off = 1;
while(cursor > off && !IS_UTF8_1ST_CHAR(text[cursor - off]))
off++;
memmove(text + cursor - off, text + cursor, sizeof text - cursor + off);
cursor -= off;
match(text);
}
break;
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case XK_Delete:
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off = 1;
while(cursor + off < sizeof text - 1 && !IS_UTF8_1ST_CHAR(text[cursor + off]))
off++;
memmove(text + cursor, text + cursor + off, sizeof text - cursor);
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match(text);
break;
case XK_End:
if(cursor < len) {
cursor = len;
break;
}
while(next) {
sel = curr = next;
calcoffsets();
}
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while(sel && sel->right)
sel = sel->right;
break;
case XK_Escape:
ret = 1;
running = False;
break;
case XK_Home:
if(sel == item) {
cursor = 0;
break;
}
sel = curr = item;
calcoffsets();
break;
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case XK_Left:
case XK_Up:
if(sel && sel->left){
sel=sel->left;
if(sel->right == curr) {
curr = prev;
calcoffsets();
}
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}
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else if(cursor > 0) {
do {
cursor--;
} while(cursor > 0 && !IS_UTF8_1ST_CHAR(text[cursor]));
} else
return;
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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:
if((e->state & ShiftMask) || !sel)
fprintf(stdout, "%s", text);
else
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fprintf(stdout, "%s", sel->text);
fflush(stdout);
running = False;
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break;
case XK_Right:
case XK_Down:
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if(cursor < len) {
do {
cursor++;
} while(cursor < len && !IS_UTF8_1ST_CHAR(text[cursor]));
} else if(sel && sel->right) {
sel=sel->right;
if(sel == next) {
curr = next;
calcoffsets();
}
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}
else
return;
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break;
case XK_Tab:
if(!sel)
return;
strncpy(text, sel->text, sizeof text);
cursor = strlen(text);
match(text);
break;
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}
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drawmenu();
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}
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void
match(char *pattern) {
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unsigned int plen;
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Item *i, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
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if(!pattern)
return;
plen = strlen(pattern);
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item = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
for(i = allitems; i; i = i->next)
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if(!fstrncmp(pattern, i->text, plen + 1))
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appenditem(i, &lexact, &exactend);
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else if(!fstrncmp(pattern, i->text, plen))
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appenditem(i, &lprefix, &prefixend);
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else if(fstrstr(i->text, pattern))
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appenditem(i, &lsubstr, &substrend);
if(lexact) {
item = lexact;
itemend = exactend;
}
if(lprefix) {
if(itemend) {
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itemend->right = lprefix;
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lprefix->left = itemend;
}
else
item = lprefix;
itemend = prefixend;
}
if(lsubstr) {
if(itemend) {
itemend->right = lsubstr;
lsubstr->left = itemend;
}
else
item = lsubstr;
}
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curr = prev = next = sel = item;
calcoffsets();
}
void
readstdin(void) {
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char *p, buf[sizeof text];
unsigned int len = 0, max = 0;
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Item *i, *new;
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i = NULL;
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while(fgets(buf, sizeof buf, stdin)) {
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len = strlen(buf);
if(buf[len-1] == '\n')
buf[--len] = '\0';
if(!(p = strdup(buf)))
eprint("fatal: could not strdup() %u bytes\n", len);
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if(max < len || !maxname) {
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maxname = p;
max = len;
}
if(!(new = (Item *)malloc(sizeof(Item))))
eprint("fatal: could not malloc() %u bytes\n", sizeof(Item));
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new->next = new->left = new->right = NULL;
new->text = p;
if(!i)
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allitems = new;
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else
i->next = new;
i = new;
}
}
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void
run(void) {
XEvent ev;
/* main event loop */
while(running && !XNextEvent(dpy, &ev))
switch (ev.type) {
default: /* ignore all crap */
break;
case KeyPress:
kpress(&ev.xkey);
break;
case Expose:
if(ev.xexpose.count == 0)
drawmenu();
break;
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case VisibilityNotify:
if (ev.xvisibility.state != VisibilityUnobscured)
XRaiseWindow(dpy, win);
break;
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}
}
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void
setup(Bool topbar) {
int i, j, x, y;
#if XINERAMA
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int n;
XineramaScreenInfo *info = NULL;
#endif
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XModifierKeymap *modmap;
XSetWindowAttributes wa;
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XWindowAttributes pwa;
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/* init modifier map */
modmap = XGetModifierMapping(dpy);
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for(i = 0; i < 8; i++)
for(j = 0; j < modmap->max_keypermod; j++) {
if(modmap->modifiermap[i * modmap->max_keypermod + j]
== XKeysymToKeycode(dpy, XK_Num_Lock))
numlockmask = (1 << i);
}
XFreeModifiermap(modmap);
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/* style */
dc.norm[ColBG] = getcolor(normbgcolor);
dc.norm[ColFG] = getcolor(normfgcolor);
dc.sel[ColBG] = getcolor(selbgcolor);
dc.sel[ColFG] = getcolor(selfgcolor);
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initfont(font);
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/* menu window */
wa.override_redirect = True;
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wa.background_pixmap = ParentRelative;
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wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask | VisibilityChangeMask;
/* menu window geometry */
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mh = (dc.font.height + 2) * (lines + 1);
#if XINERAMA
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if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
i = 0;
if(n > 1) {
int di;
unsigned int dui;
Window dummy;
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if(XQueryPointer(dpy, parent, &dummy, &dummy, &x, &y, &di, &di, &dui))
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 = topbar ? info[i].y_org : info[i].y_org + info[i].height - mh;
mw = info[i].width;
XFree(info);
}
else
#endif
{
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XGetWindowAttributes(dpy, parent, &pwa);
x = 0;
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y = topbar ? 0 : pwa.height - mh;
mw = pwa.width;
}
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win = XCreateWindow(dpy, parent, x, y, mw, mh, 0,
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DefaultDepth(dpy, screen), CopyFromParent,
DefaultVisual(dpy, screen),
CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
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/* pixmap */
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dc.drawable = XCreatePixmap(dpy, parent, mw, mh, DefaultDepth(dpy, screen));
dc.gc = XCreateGC(dpy, parent, 0, NULL);
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XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
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if(!dc.font.set)
XSetFont(dpy, dc.gc, dc.font.xfont->fid);
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if(maxname)
cmdw = MIN(textw(maxname), mw / 3);
if(prompt)
promptw = MIN(textw(prompt), mw / 5);
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text[0] = '\0';
match(text);
XMapRaised(dpy, win);
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}
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int
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textnw(const char *text, unsigned int len) {
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XRectangle r;
if(dc.font.set) {
XmbTextExtents(dc.font.set, text, len, NULL, &r);
return r.width;
}
return XTextWidth(dc.font.xfont, text, len);
}
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int
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textw(const char *text) {
return textnw(text, strlen(text)) + dc.font.height;
}
int
main(int argc, char *argv[]) {
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unsigned int i;
Bool topbar = True;
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/* command line args */
for(i = 1; i < argc; i++)
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if(!strcmp(argv[i], "-i")) {
fstrncmp = strncasecmp;
fstrstr = cistrstr;
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}
else if(!strcmp(argv[i], "-b"))
topbar = False;
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else if(!strcmp(argv[i], "-e")) {
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if(++i < argc) parent = atoi(argv[i]);
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}
else if(!strcmp(argv[i], "-l")) {
calcoffsets = calcoffsetsv;
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if(++i < argc) lines = atoi(argv[i]);
}
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else if(!strcmp(argv[i], "-fn")) {
if(++i < argc) font = argv[i];
}
else if(!strcmp(argv[i], "-nb")) {
if(++i < argc) normbgcolor = argv[i];
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}
else if(!strcmp(argv[i], "-nf")) {
if(++i < argc) normfgcolor = argv[i];
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}
else if(!strcmp(argv[i], "-p")) {
if(++i < argc) prompt = argv[i];
}
else if(!strcmp(argv[i], "-sb")) {
if(++i < argc) selbgcolor = argv[i];
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}
else if(!strcmp(argv[i], "-sf")) {
if(++i < argc) selfgcolor = argv[i];
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}
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else if(!strcmp(argv[i], "-v"))
eprint("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n");
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else
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eprint("usage: dmenu [-i] [-b] [-e <xid>] [-l <lines>] [-fn <font>] [-nb <color>]\n"
" [-nf <color>] [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n");
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if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
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fprintf(stderr, "warning: no locale support\n");
if(!(dpy = XOpenDisplay(NULL)))
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eprint("dmenu: cannot open display\n");
screen = DefaultScreen(dpy);
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if(!parent)
parent = RootWindow(dpy, screen);
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readstdin();
running = grabkeyboard();
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setup(topbar);
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drawmenu();
XSync(dpy, False);
run();
cleanup();
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XCloseDisplay(dpy);
return ret;
}