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382 lines
7.4 KiB
382 lines
7.4 KiB
/*
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* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
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* (C)opyright MMVI Sander van Dijk <a dot h dot vandijk at gmail dot com>
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* See LICENSE file for license details.
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*/
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#include "dmenu.h"
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#include <ctype.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/select.h>
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#include <sys/time.h>
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#include <X11/cursorfont.h>
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#include <X11/Xutil.h>
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#include <X11/keysym.h>
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typedef struct Item Item;
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struct Item {
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Item *next; /* traverses all items */
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Item *left, *right; /* traverses items matching current search pattern */
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char *text;
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};
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/* static */
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static char text[4096];
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static int mx, my, mw, mh;
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static int ret = 0;
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static int nitem = 0;
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static unsigned int cmdw = 0;
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static Bool running = True;
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static Item *allitems = NULL; /* first of all items */
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static Item *item = NULL; /* first of pattern matching items */
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static Item *sel = NULL;
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static Item *next = NULL;
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static Item *prev = NULL;
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static Item *curr = NULL;
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static Window root;
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static Window win;
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static void
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calcoffsets(void) {
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unsigned int tw, w;
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if(!curr)
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return;
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w = cmdw + 2 * SPACE;
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for(next = curr; next; next=next->right) {
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tw = textw(next->text);
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if(tw > mw / 3)
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tw = mw / 3;
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w += tw;
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if(w > mw)
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break;
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}
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w = cmdw + 2 * SPACE;
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for(prev = curr; prev && prev->left; prev=prev->left) {
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tw = textw(prev->left->text);
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if(tw > mw / 3)
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tw = mw / 3;
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w += tw;
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if(w > mw)
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break;
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}
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}
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static void
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drawmenu(void) {
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Item *i;
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dc.x = 0;
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dc.y = 0;
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dc.w = mw;
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dc.h = mh;
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drawtext(NULL, dc.norm);
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/* print command */
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if(cmdw && item)
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dc.w = cmdw;
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drawtext(text[0] ? text : NULL, dc.norm);
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dc.x += cmdw;
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if(curr) {
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dc.w = SPACE;
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drawtext((curr && curr->left) ? "<" : NULL, dc.norm);
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dc.x += dc.w;
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/* determine maximum items */
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for(i = curr; i != next; i=i->right) {
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dc.w = textw(i->text);
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if(dc.w > mw / 3)
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dc.w = mw / 3;
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drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
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dc.x += dc.w;
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}
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dc.x = mw - SPACE;
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dc.w = SPACE;
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drawtext(next ? ">" : NULL, dc.norm);
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}
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XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
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XFlush(dpy);
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}
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static void
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match(char *pattern) {
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unsigned int plen;
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Item *i, *j;
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if(!pattern)
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return;
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plen = strlen(pattern);
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item = j = NULL;
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nitem = 0;
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for(i = allitems; i; i=i->next)
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if(plen ? !strncmp(pattern, i->text, plen) :
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strncmp(pattern, i->text, plen) && strstr(i->text, pattern)) {
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if(!j)
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item = i;
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else
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j->right = i;
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i->left = j;
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i->right = NULL;
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j = i;
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nitem++;
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}
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curr = prev = next = sel = item;
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calcoffsets();
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}
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static void
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kpress(XKeyEvent * e) {
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char buf[32];
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int num, prev_nitem;
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unsigned int i, len;
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KeySym ksym;
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len = strlen(text);
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buf[0] = 0;
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num = XLookupString(e, buf, sizeof(buf), &ksym, 0);
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if(IsFunctionKey(ksym) || IsKeypadKey(ksym)
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|| IsMiscFunctionKey(ksym) || IsPFKey(ksym)
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|| IsPrivateKeypadKey(ksym))
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return;
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/* first check if a control mask is omitted */
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if(e->state & ControlMask) {
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switch (ksym) {
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default: /* ignore other control sequences */
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return;
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break;
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case XK_h:
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case XK_H:
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ksym = XK_BackSpace;
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break;
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case XK_u:
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case XK_U:
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text[0] = 0;
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match(text);
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drawmenu();
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return;
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break;
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}
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}
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switch(ksym) {
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case XK_Left:
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if(!(sel && sel->left))
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return;
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sel=sel->left;
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if(sel->right == curr) {
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curr = prev;
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calcoffsets();
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}
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break;
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case XK_Tab:
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if(!sel)
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return;
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strncpy(text, sel->text, sizeof(text));
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match(text);
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break;
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case XK_Right:
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if(!(sel && sel->right))
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return;
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sel=sel->right;
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if(sel == next) {
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curr = next;
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calcoffsets();
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}
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break;
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case XK_Return:
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if((e->state & ShiftMask) && text)
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fprintf(stdout, "%s", text);
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else if(sel)
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fprintf(stdout, "%s", sel->text);
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else if(text)
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fprintf(stdout, "%s", text);
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fflush(stdout);
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running = False;
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break;
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case XK_Escape:
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ret = 1;
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running = False;
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break;
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case XK_BackSpace:
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if((i = len)) {
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prev_nitem = nitem;
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do {
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text[--i] = 0;
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match(text);
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} while(i && nitem && prev_nitem == nitem);
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match(text);
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}
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break;
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default:
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if(num && !iscntrl((int) buf[0])) {
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buf[num] = 0;
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if(len > 0)
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strncat(text, buf, sizeof(text));
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else
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strncpy(text, buf, sizeof(text));
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match(text);
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}
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}
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drawmenu();
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}
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static char *
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readstdin(void) {
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static char *maxname = NULL;
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char *p, buf[1024];
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unsigned int len = 0, max = 0;
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Item *i, *new;
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i = 0;
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while(fgets(buf, sizeof(buf), stdin)) {
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len = strlen(buf);
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if (buf[len - 1] == '\n')
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buf[len - 1] = 0;
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p = estrdup(buf);
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if(max < len) {
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maxname = p;
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max = len;
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}
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new = emalloc(sizeof(Item));
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new->next = new->left = new->right = NULL;
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new->text = p;
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if(!i)
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allitems = new;
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else
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i->next = new;
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i = new;
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}
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return maxname;
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}
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/* extern */
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int screen;
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Display *dpy;
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DC dc = {0};
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int
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main(int argc, char *argv[]) {
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char *maxname;
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fd_set rd;
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struct timeval timeout;
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Item *i;
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XEvent ev;
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XSetWindowAttributes wa;
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if(argc == 2 && !strncmp("-v", argv[1], 3)) {
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fputs("dmenu-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
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exit(EXIT_SUCCESS);
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}
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else if(argc != 1)
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eprint("usage: dmenu [-v]\n");
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dpy = XOpenDisplay(0);
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if(!dpy)
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eprint("dmenu: cannot open display\n");
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screen = DefaultScreen(dpy);
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root = RootWindow(dpy, screen);
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/* Note, the select() construction allows to grab all keypresses as
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* early as possible, to not loose them. But if there is no standard
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* input supplied, we will make sure to exit after MAX_WAIT_STDIN
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* seconds. This is convenience behavior for rapid typers.
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*/
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while(XGrabKeyboard(dpy, root, True, GrabModeAsync,
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GrabModeAsync, CurrentTime) != GrabSuccess)
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usleep(1000);
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timeout.tv_usec = 0;
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timeout.tv_sec = STDIN_TIMEOUT;
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FD_ZERO(&rd);
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FD_SET(STDIN_FILENO, &rd);
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if(select(ConnectionNumber(dpy) + 1, &rd, NULL, NULL, &timeout) < 1)
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goto UninitializedEnd;
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maxname = readstdin();
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/* style */
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dc.sel[ColBG] = getcolor(SELBGCOLOR);
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dc.sel[ColFG] = getcolor(SELFGCOLOR);
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dc.norm[ColBG] = getcolor(NORMBGCOLOR);
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dc.norm[ColFG] = getcolor(NORMFGCOLOR);
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setfont(FONT);
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wa.override_redirect = 1;
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wa.background_pixmap = ParentRelative;
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wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask;
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mx = my = 0;
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mw = DisplayWidth(dpy, screen);
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mh = dc.font.height + 2;
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win = XCreateWindow(dpy, root, mx, my, mw, mh, 0,
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DefaultDepth(dpy, screen), CopyFromParent,
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DefaultVisual(dpy, screen),
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CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
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XDefineCursor(dpy, win, XCreateFontCursor(dpy, XC_xterm));
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/* pixmap */
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dc.drawable = XCreatePixmap(dpy, root, mw, mh, DefaultDepth(dpy, screen));
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dc.gc = XCreateGC(dpy, root, 0, 0);
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XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
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if(maxname)
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cmdw = textw(maxname);
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if(cmdw > mw / 3)
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cmdw = mw / 3;
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text[0] = 0;
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match(text);
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XMapRaised(dpy, win);
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drawmenu();
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XSync(dpy, False);
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/* main event loop */
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while(running && !XNextEvent(dpy, &ev)) {
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switch (ev.type) {
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default: /* ignore all crap */
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break;
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case KeyPress:
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kpress(&ev.xkey);
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break;
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case Expose:
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if(ev.xexpose.count == 0)
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drawmenu();
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break;
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}
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}
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while(allitems) {
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i = allitems->next;
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free(allitems->text);
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free(allitems);
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allitems = i;
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}
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if(dc.font.set)
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XFreeFontSet(dpy, dc.font.set);
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else
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XFreeFont(dpy, dc.font.xfont);
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XFreePixmap(dpy, dc.drawable);
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XFreeGC(dpy, dc.gc);
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XDestroyWindow(dpy, win);
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UninitializedEnd:
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XUngrabKeyboard(dpy, CurrentTime);
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XCloseDisplay(dpy);
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return ret;
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}
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