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-rw-r--r--main.c426
1 files changed, 426 insertions, 0 deletions
diff --git a/main.c b/main.c
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+/*
+ * (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;
+}