diff options
Diffstat (limited to 'dmenu.c')
| -rw-r--r-- | dmenu.c | 701 |
1 files changed, 701 insertions, 0 deletions
@@ -0,0 +1,701 @@ +/* See LICENSE file for copyright and license details. */ +#include <ctype.h> +#include <locale.h> +#include <stdarg.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <X11/Xlib.h> +#include <X11/Xutil.h> +#include <X11/keysym.h> + +/* macros */ +#define CLEANMASK(mask) (mask & ~(numlockmask | LockMask)) + +/* enums */ +enum { ColFG, ColBG, ColLast }; + +/* typedefs */ +typedef struct { + int x, y, w, h; + unsigned long norm[ColLast]; + unsigned long sel[ColLast]; + Drawable drawable; + GC gc; + struct { + XFontStruct *xfont; + XFontSet set; + int ascent; + int descent; + int height; + } font; +} DC; /* draw context */ + +typedef struct Item Item; +struct Item { + Item *next; /* traverses all items */ + Item *left, *right; /* traverses items matching current search pattern */ + char *text; +}; + +/* forward declarations */ +static void *emalloc(unsigned int size); +static void eprint(const char *errstr, ...); +static char *estrdup(const char *str); +static void drawtext(const char *text, unsigned long col[ColLast]); +static unsigned int textw(const char *text); +static unsigned int textnw(const char *text, unsigned int len); +static void calcoffsets(void); +static void drawmenu(void); +static Bool grabkeyboard(void); +static unsigned long getcolor(const char *colstr); +static void initfont(const char *fontstr); +static int strido(const char *text, const char *pattern); +static void match(char *pattern); +static void kpress(XKeyEvent * e); +static char *readstdin(void); +static void usage(void); + + +/* variables */ +static int screen; +static Display *dpy; +static DC dc = {0}; +static char text[4096]; +static char *prompt = NULL; +static int mw, mh; +static int ret = 0; +static int nitem = 0; +static unsigned int cmdw = 0; +static unsigned int promptw = 0; +static unsigned int numlockmask = 0; +static Bool running = True; +static Item *allitems = NULL; /* first of all items */ +static Item *item = NULL; /* first of pattern matching items */ +static Item *sel = NULL; +static Item *next = NULL; +static Item *prev = NULL; +static Item *curr = NULL; +static Window root; +static Window win; + +#include "config.h" + +static void * +emalloc(unsigned int size) { + void *res = malloc(size); + + if(!res) + eprint("fatal: could not malloc() %u bytes\n", size); + return res; +} + +static void +eprint(const char *errstr, ...) { + va_list ap; + + va_start(ap, errstr); + vfprintf(stderr, errstr, ap); + va_end(ap); + exit(EXIT_FAILURE); +} + +static char * +estrdup(const char *str) { + void *res = strdup(str); + + if(!res) + eprint("fatal: could not malloc() %u bytes\n", strlen(str)); + return res; +} + + +static void +drawtext(const char *text, unsigned long col[ColLast]) { + int x, y, w, h; + static char buf[256]; + unsigned int len, olen; + XRectangle r = { dc.x, dc.y, dc.w, dc.h }; + + XSetForeground(dpy, dc.gc, col[ColBG]); + XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1); + if(!text) + return; + w = 0; + olen = len = strlen(text); + if(len >= sizeof buf) + len = sizeof buf - 1; + memcpy(buf, text, len); + buf[len] = 0; + h = dc.font.ascent + dc.font.descent; + y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent; + x = dc.x + (h / 2); + /* shorten text if necessary */ + while(len && (w = textnw(buf, len)) > dc.w - h) + buf[--len] = 0; + if(len < olen) { + if(len > 1) + buf[len - 1] = '.'; + if(len > 2) + buf[len - 2] = '.'; + if(len > 3) + buf[len - 3] = '.'; + } + if(w > dc.w) + return; /* too long */ + 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); +} + +static unsigned int +textw(const char *text) { + return textnw(text, strlen(text)) + dc.font.height; +} + +static unsigned int +textnw(const char *text, unsigned int len) { + XRectangle r; + + if(dc.font.set) { + XmbTextExtents(dc.font.set, text, len, NULL, &r); + return r.width; + } + return XTextWidth(dc.font.xfont, text, len); +} + +static void +calcoffsets(void) { + unsigned int tw, w; + + if(!curr) + return; + w = promptw + cmdw + 2 * SPACE; + for(next = curr; next; next=next->right) { + tw = textw(next->text); + if(tw > mw / 3) + tw = mw / 3; + w += tw; + if(w > mw) + break; + } + w = promptw + cmdw + 2 * SPACE; + for(prev = curr; prev && prev->left; prev=prev->left) { + tw = textw(prev->left->text); + if(tw > mw / 3) + tw = mw / 3; + w += tw; + if(w > mw) + break; + } +} + +static void +drawmenu(void) { + Item *i; + + dc.x = 0; + dc.y = 0; + dc.w = mw; + dc.h = mh; + drawtext(NULL, dc.norm); + /* print prompt? */ + if(promptw) { + dc.w = promptw; + drawtext(prompt, dc.sel); + } + dc.x += promptw; + dc.w = mw - promptw; + /* print command */ + if(cmdw && item) + dc.w = cmdw; + drawtext(text[0] ? text : NULL, dc.norm); + dc.x += cmdw; + if(curr) { + dc.w = SPACE; + drawtext((curr && curr->left) ? "<" : NULL, dc.norm); + dc.x += dc.w; + /* determine maximum items */ + for(i = curr; i != next; i=i->right) { + dc.w = textw(i->text); + if(dc.w > mw / 3) + dc.w = mw / 3; + drawtext(i->text, (sel == i) ? dc.sel : dc.norm); + dc.x += dc.w; + } + dc.x = mw - SPACE; + dc.w = SPACE; + drawtext(next ? ">" : NULL, dc.norm); + } + XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0); + XFlush(dpy); +} + +static Bool +grabkeyboard(void) { + unsigned int len; + + for(len = 1000; len; len--) { + if(XGrabKeyboard(dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime) + == GrabSuccess) + break; + usleep(1000); + } + return len > 0; +} + +static unsigned long +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; +} + +static void +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; + if(dc.font.set) + XFreeFontSet(dpy, dc.font.set); + dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def); + if(missing) + XFreeStringList(missing); + if(dc.font.set) { + XFontSetExtents *font_extents; + XFontStruct **xfonts; + char **font_names; + dc.font.ascent = dc.font.descent = 0; + font_extents = XExtentsOfFontSet(dc.font.set); + n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names); + for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) { + if(dc.font.ascent < (*xfonts)->ascent) + dc.font.ascent = (*xfonts)->ascent; + if(dc.font.descent < (*xfonts)->descent) + dc.font.descent = (*xfonts)->descent; + xfonts++; + } + } + else { + if(dc.font.xfont) + XFreeFont(dpy, dc.font.xfont); + dc.font.xfont = NULL; + if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))) { + if(!(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; +} + +static int +strido(const char *text, const char *pattern) { + for(; *text && *pattern; text++) + if (*text == *pattern) + pattern++; + return !*pattern; +} + +static void +match(char *pattern) { + unsigned int plen; + Item *i, *j; + + if(!pattern) + return; + plen = strlen(pattern); + item = j = NULL; + nitem = 0; + for(i = allitems; i; i=i->next) + if(!plen || !strncmp(pattern, i->text, plen)) { + if(!j) + item = i; + else + j->right = i; + i->left = j; + i->right = NULL; + j = i; + nitem++; + } + for(i = allitems; i; i=i->next) + if(plen && strncmp(pattern, i->text, plen) + && strstr(i->text, pattern)) { + if(!j) + item = i; + else + j->right = i; + i->left = j; + i->right = NULL; + j = i; + nitem++; + } + for(i = allitems; i; i=i->next) + if(plen && strncmp(pattern, i->text, plen) + && !strstr(i->text, pattern) + && strido(i->text,pattern)) { + if(!j) + item = i; + else + j->right = i; + i->left = j; + i->right = NULL; + j = i; + nitem++; + } + curr = prev = next = sel = item; + calcoffsets(); +} + +static void +kpress(XKeyEvent * e) { + char buf[32]; + int i, num; + unsigned int len; + KeySym ksym; + + len = strlen(text); + buf[0] = 0; + num = XLookupString(e, buf, sizeof buf, &ksym, 0); + if(IsKeypadKey(ksym)) { + if(ksym == XK_KP_Enter) { + ksym = XK_Return; + } else if(ksym >= XK_KP_0 && ksym <= XK_KP_9) { + ksym = (ksym - XK_KP_0) + XK_0; + } + } + if(IsFunctionKey(ksym) || IsKeypadKey(ksym) + || IsMiscFunctionKey(ksym) || IsPFKey(ksym) + || IsPrivateKeypadKey(ksym)) + return; + /* first check if a control mask is omitted */ + if(e->state & ControlMask) { + switch (ksym) { + default: /* ignore other control sequences */ + return; + case XK_bracketleft: + ksym = XK_Escape; + break; + case XK_h: + case XK_H: + ksym = XK_BackSpace; + break; + case XK_i: + case XK_I: + ksym = XK_Tab; + break; + case XK_j: + case XK_J: + ksym = XK_Return; + break; + case XK_u: + case XK_U: + text[0] = 0; + match(text); + drawmenu(); + return; + case XK_w: + case XK_W: + if(len) { + i = len - 1; + while(i >= 0 && text[i] == ' ') + text[i--] = 0; + while(i >= 0 && text[i] != ' ') + text[i--] = 0; + match(text); + drawmenu(); + } + return; + } + } + if(CLEANMASK(e->state) & Mod1Mask) { + switch(ksym) { + default: return; + case XK_h: + ksym = XK_Left; + break; + case XK_l: + ksym = XK_Right; + break; + case XK_j: + ksym = XK_Next; + break; + case XK_k: + ksym = XK_Prior; + break; + case XK_g: + ksym = XK_Home; + break; + case XK_G: + ksym = XK_End; + break; + } + } + switch(ksym) { + default: + if(num && !iscntrl((int) buf[0])) { + buf[num] = 0; + if(len > 0) + strncat(text, buf, sizeof text); + else + strncpy(text, buf, sizeof text); + match(text); + } + break; + case XK_BackSpace: + if(len) { + text[--len] = 0; + match(text); + } + break; + case XK_End: + if(!item) + return; + while(next) { + sel = curr = next; + calcoffsets(); + } + while(sel && sel->right) + sel = sel->right; + break; + case XK_Escape: + ret = 1; + running = False; + break; + case XK_Home: + if(!item) + return; + sel = curr = item; + calcoffsets(); + break; + case XK_Left: + 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: + if((e->state & ShiftMask) && text) + fprintf(stdout, "%s", text); + else if(sel) + fprintf(stdout, "%s", sel->text); + else if(text) + fprintf(stdout, "%s", text); + fflush(stdout); + running = False; + break; + case XK_Right: + 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); + match(text); + break; + } + drawmenu(); +} + +static char * +readstdin(void) { + static char *maxname = NULL; + char *p, buf[1024]; + unsigned int len = 0, max = 0; + Item *i, *new; + + i = 0; + while(fgets(buf, sizeof buf, stdin)) { + len = strlen(buf); + if (buf[len - 1] == '\n') + buf[len - 1] = 0; + p = estrdup(buf); + if(max < len) { + maxname = p; + max = len; + } + new = emalloc(sizeof(Item)); + new->next = new->left = new->right = NULL; + new->text = p; + if(!i) + allitems = new; + else + i->next = new; + i = new; + } + + return maxname; +} + +static void +usage(void) { + eprint("usage: dmenu [-b] [-fn <font>] [-nb <color>] [-nf <color>]\n" + " [-p <prompt>] [-sb <color>] [-sf <color>] [-v]\n"); +} + +int +main(int argc, char *argv[]) { + Bool bottom = False; + char *font = FONT; + char *maxname; + char *normbg = NORMBGCOLOR; + char *normfg = NORMFGCOLOR; + char *selbg = SELBGCOLOR; + char *selfg = SELFGCOLOR; + int i, j; + Item *itm; + XEvent ev; + XModifierKeymap *modmap; + XSetWindowAttributes wa; + + /* command line args */ + for(i = 1; i < argc; i++) + if(!strcmp(argv[i], "-b")) { + bottom = True; + } + else if(!strcmp(argv[i], "-fn")) { + if(++i < argc) font = argv[i]; + } + else if(!strcmp(argv[i], "-nb")) { + if(++i < argc) normbg = argv[i]; + } + else if(!strcmp(argv[i], "-nf")) { + if(++i < argc) normfg = argv[i]; + } + else if(!strcmp(argv[i], "-p")) { + if(++i < argc) prompt = argv[i]; + } + else if(!strcmp(argv[i], "-sb")) { + if(++i < argc) selbg = argv[i]; + } + else if(!strcmp(argv[i], "-sf")) { + if(++i < argc) selfg = argv[i]; + } + else if(!strcmp(argv[i], "-v")) + eprint("dmenu-"VERSION", © 2006-2007 Anselm R. Garbe, Sander van Dijk\n"); + else + usage(); + setlocale(LC_CTYPE, ""); + dpy = XOpenDisplay(0); + if(!dpy) + eprint("dmenu: cannot open display\n"); + screen = DefaultScreen(dpy); + root = RootWindow(dpy, screen); + if(isatty(STDIN_FILENO)) { + maxname = readstdin(); + running = grabkeyboard(); + } + else { /* prevent keypress loss */ + running = grabkeyboard(); + maxname = readstdin(); + } + /* init modifier map */ + modmap = XGetModifierMapping(dpy); + 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); + /* style */ + dc.norm[ColBG] = getcolor(normbg); + dc.norm[ColFG] = getcolor(normfg); + dc.sel[ColBG] = getcolor(selbg); + dc.sel[ColFG] = getcolor(selfg); + initfont(font); + /* menu window */ + wa.override_redirect = 1; + wa.background_pixmap = ParentRelative; + wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask; + mw = DisplayWidth(dpy, screen); + mh = dc.font.height + 2; + win = XCreateWindow(dpy, root, 0, + bottom ? DisplayHeight(dpy, screen) - mh : 0, mw, mh, 0, + DefaultDepth(dpy, screen), CopyFromParent, + DefaultVisual(dpy, screen), + CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa); + /* pixmap */ + dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen)); + dc.gc = XCreateGC(dpy, root, 0, 0); + XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter); + if(!dc.font.set) + XSetFont(dpy, dc.gc, dc.font.xfont->fid); + if(maxname) + cmdw = textw(maxname); + if(cmdw > mw / 3) + cmdw = mw / 3; + if(prompt) + promptw = textw(prompt); + if(promptw > mw / 5) + promptw = mw / 5; + text[0] = 0; + match(text); + XMapRaised(dpy, win); + drawmenu(); + XSync(dpy, False); + + /* 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; + } + + /* cleanup */ + 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); + XCloseDisplay(dpy); + return ret; +} |