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Diffstat (limited to 'main.c')
| -rw-r--r-- | main.c | 426 |
1 files changed, 426 insertions, 0 deletions
@@ -0,0 +1,426 @@ +/* + * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com> + * (C)opyright MMVI Sander van Dijk <a dot h dot vandijk at gmail dot com> + * See LICENSE file for license details. + */ + +#include "dmenu.h" + +#include <ctype.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <X11/cursorfont.h> +#include <X11/Xutil.h> +#include <X11/keysym.h> + +typedef struct Item Item; + +struct Item { + Item *next; /* traverses all items */ + Item *left, *right; /* traverses items matching current search pattern */ + char *text; +}; + +static Display *dpy; +static Window root; +static Window win; +static Bool done = False; + +static Item *allitem = NULL; /* first of all items */ +static Item *item = NULL; /* first of pattern matching items */ +static Item *sel = NULL; +static Item *nextoff = NULL; +static Item *prevoff = NULL; +static Item *curroff = NULL; + +static int screen, mx, my, mw, mh; +static char *title = NULL; +static char text[4096]; +static int ret = 0; +static int nitem = 0; +static unsigned int cmdw = 0; +static unsigned int tw = 0; +static unsigned int cw = 0; +static const int seek = 30; /* 30px */ + +static Brush brush = {0}; + +static void draw_menu(); +static void kpress(XKeyEvent * e); + +static char version[] = "dmenu - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n"; + +static void +update_offsets() +{ + unsigned int tw, w = cmdw + 2 * seek; + + if(!curroff) + return; + + for(nextoff = curroff; nextoff; nextoff=nextoff->right) { + tw = textw(&brush.font, nextoff->text); + if(tw > mw / 3) + tw = mw / 3; + w += tw + brush.font.height; + if(w > mw) + break; + } + + w = cmdw + 2 * seek; + for(prevoff = curroff; prevoff && prevoff->left; prevoff=prevoff->left) { + tw = textw(&brush.font, prevoff->left->text); + if(tw > mw / 3) + tw = mw / 3; + w += tw + brush.font.height; + if(w > mw) + break; + } +} + +static void +update_items(char *pattern) +{ + unsigned int plen = strlen(pattern); + Item *i, *j; + + if(!pattern) + return; + + if(!title || *pattern) + cmdw = cw; + else + cmdw = tw; + + item = j = NULL; + nitem = 0; + + for(i = allitem; 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 = allitem; 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++; + } + + curroff = prevoff = nextoff = sel = item; + + update_offsets(); +} + +/* creates brush structs for brush mode drawing */ +static void +draw_menu() +{ + Item *i; + + brush.x = 0; + brush.y = 0; + brush.w = mw; + brush.h = mh; + draw(dpy, &brush, False, 0); + + /* print command */ + if(!title || text[0]) { + cmdw = cw; + if(cmdw && item) + brush.w = cmdw; + draw(dpy, &brush, False, text); + } + else { + cmdw = tw; + brush.w = cmdw; + draw(dpy, &brush, False, title); + } + brush.x += brush.w; + + if(curroff) { + brush.w = seek; + draw(dpy, &brush, False, (curroff && curroff->left) ? "<" : 0); + brush.x += brush.w; + + /* determine maximum items */ + for(i = curroff; i != nextoff; i=i->right) { + brush.border = False; + brush.w = textw(&brush.font, i->text); + if(brush.w > mw / 3) + brush.w = mw / 3; + brush.w += brush.font.height; + if(sel == i) { + swap((void **)&brush.fg, (void **)&brush.bg); + draw(dpy, &brush, True, i->text); + swap((void **)&brush.fg, (void **)&brush.bg); + } + else + draw(dpy, &brush, False, i->text); + brush.x += brush.w; + } + + brush.x = mw - seek; + brush.w = seek; + draw(dpy, &brush, False, nextoff ? ">" : 0); + } + XCopyArea(dpy, brush.drawable, win, brush.gc, 0, 0, mw, mh, 0, 0); + XFlush(dpy); +} + +static void +kpress(XKeyEvent * e) +{ + KeySym ksym; + char buf[32]; + int num, prev_nitem; + unsigned int i, len = strlen(text); + + buf[0] = 0; + num = XLookupString(e, buf, sizeof(buf), &ksym, 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; + break; + case XK_h: + ksym = XK_BackSpace; + break; + case XK_U: + case XK_u: + text[0] = 0; + update_items(text); + draw_menu(); + return; + break; + case XK_bracketleft: + ksym = XK_Escape; + break; + } + } + switch(ksym) { + case XK_Left: + if(!(sel && sel->left)) + return; + sel=sel->left; + if(sel->right == curroff) { + curroff = prevoff; + update_offsets(); + } + break; + case XK_Tab: + if(!sel) + return; + strncpy(text, sel->text, sizeof(text)); + update_items(text); + break; + case XK_Right: + if(!(sel && sel->right)) + return; + sel=sel->right; + if(sel == nextoff) { + curroff = nextoff; + update_offsets(); + } + break; + case XK_Return: + if(e->state & ShiftMask) { + if(text) + fprintf(stdout, "%s", text); + } + else if(sel) + fprintf(stdout, "%s", sel->text); + else if(text) + fprintf(stdout, "%s", text); + fflush(stdout); + done = True; + break; + case XK_Escape: + ret = 1; + done = True; + break; + case XK_BackSpace: + if((i = len)) { + prev_nitem = nitem; + do { + text[--i] = 0; + update_items(text); + } while(i && nitem && prev_nitem == nitem); + update_items(text); + } + break; + default: + if(num && !iscntrl((int) buf[0])) { + buf[num] = 0; + if(len > 0) + strncat(text, buf, sizeof(text)); + else + strncpy(text, buf, sizeof(text)); + update_items(text); + } + } + draw_menu(); +} + +static char * +read_allitems() +{ + 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) + allitem = new; + else + i->next = new; + i = new; + } + + return maxname; +} + +int +main(int argc, char *argv[]) +{ + int i; + XSetWindowAttributes wa; + char *maxname; + XEvent ev; + + /* command line args */ + for(i = 1; i < argc; i++) { + if (argv[i][0] == '-') + switch (argv[i][1]) { + case 'v': + fprintf(stdout, "%s", version); + exit(0); + break; + case 't': + if(++i < argc) { + title = argv[i]; + break; + } + default: + eprint("usage: dmenu [-v] [-t <title>]\n"); + break; + } + else + eprint("usage: dmenu [-v] [-t <title>]\n"); + } + + dpy = XOpenDisplay(0); + if(!dpy) + eprint("dmenu: cannot open dpy\n"); + screen = DefaultScreen(dpy); + root = RootWindow(dpy, screen); + + maxname = read_allitems(); + + /* grab as early as possible, but after reading all items!!! */ + while(XGrabKeyboard(dpy, root, True, GrabModeAsync, + GrabModeAsync, CurrentTime) != GrabSuccess) + usleep(1000); + + /* style */ + loadcolors(dpy, screen, &brush, BGCOLOR, FGCOLOR, BORDERCOLOR); + loadfont(dpy, &brush.font, FONT); + + wa.override_redirect = 1; + wa.background_pixmap = ParentRelative; + wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask; + + mx = my = 0; + mw = DisplayWidth(dpy, screen); + mh = texth(&brush.font); + + win = XCreateWindow(dpy, root, mx, my, mw, mh, 0, + DefaultDepth(dpy, screen), CopyFromParent, + DefaultVisual(dpy, screen), + CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa); + XDefineCursor(dpy, win, XCreateFontCursor(dpy, XC_xterm)); + XFlush(dpy); + + /* pixmap */ + brush.gc = XCreateGC(dpy, root, 0, 0); + brush.drawable = XCreatePixmap(dpy, win, mw, mh, + DefaultDepth(dpy, screen)); + XFlush(dpy); + + if(maxname) + cw = textw(&brush.font, maxname) + brush.font.height; + if(cw > mw / 3) + cw = mw / 3; + + if(title) { + tw = textw(&brush.font, title) + brush.font.height; + if(tw > mw / 3) + tw = mw / 3; + } + + cmdw = title ? tw : cw; + + text[0] = 0; + update_items(text); + XMapRaised(dpy, win); + draw_menu(); + XFlush(dpy); + + /* main event loop */ + while(!done && !XNextEvent(dpy, &ev)) { + switch (ev.type) { + case KeyPress: + kpress(&ev.xkey); + break; + case Expose: + if(ev.xexpose.count == 0) + draw_menu(); + break; + default: + break; + } + } + + XUngrabKeyboard(dpy, CurrentTime); + XFreePixmap(dpy, brush.drawable); + XFreeGC(dpy, brush.gc); + XDestroyWindow(dpy, win); + XCloseDisplay(dpy); + + return ret; +} |