initial import
This commit is contained in:
arg@10ksloc.org
426
main.c
Normal file
426
main.c
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@ -0,0 +1,426 @@
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/*
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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 <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 Display *dpy;
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static Window root;
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static Window win;
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static Bool done = False;
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static Item *allitem = 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 *nextoff = NULL;
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static Item *prevoff = NULL;
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static Item *curroff = NULL;
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static int screen, mx, my, mw, mh;
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static char *title = NULL;
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static char text[4096];
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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 unsigned int tw = 0;
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static unsigned int cw = 0;
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static const int seek = 30; /* 30px */
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static Brush brush = {0};
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static void draw_menu();
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static void kpress(XKeyEvent * e);
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static char version[] = "dmenu - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
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static void
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update_offsets()
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{
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unsigned int tw, w = cmdw + 2 * seek;
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if(!curroff)
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return;
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for(nextoff = curroff; nextoff; nextoff=nextoff->right) {
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tw = textw(&brush.font, nextoff->text);
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if(tw > mw / 3)
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tw = mw / 3;
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w += tw + brush.font.height;
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if(w > mw)
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break;
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}
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w = cmdw + 2 * seek;
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for(prevoff = curroff; prevoff && prevoff->left; prevoff=prevoff->left) {
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tw = textw(&brush.font, prevoff->left->text);
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if(tw > mw / 3)
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tw = mw / 3;
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w += tw + brush.font.height;
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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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update_items(char *pattern)
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{
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unsigned int plen = strlen(pattern);
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Item *i, *j;
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if(!pattern)
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return;
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if(!title || *pattern)
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cmdw = cw;
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else
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cmdw = tw;
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item = j = NULL;
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nitem = 0;
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for(i = allitem; i; i=i->next)
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if(!plen || !strncmp(pattern, i->text, plen)) {
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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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for(i = allitem; i; i=i->next)
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if(plen && strncmp(pattern, i->text, plen)
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&& 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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curroff = prevoff = nextoff = sel = item;
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update_offsets();
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}
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/* creates brush structs for brush mode drawing */
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static void
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draw_menu()
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{
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Item *i;
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brush.x = 0;
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brush.y = 0;
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brush.w = mw;
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brush.h = mh;
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draw(dpy, &brush, False, 0);
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/* print command */
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if(!title || text[0]) {
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cmdw = cw;
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if(cmdw && item)
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brush.w = cmdw;
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draw(dpy, &brush, False, text);
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}
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else {
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cmdw = tw;
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brush.w = cmdw;
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draw(dpy, &brush, False, title);
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}
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brush.x += brush.w;
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if(curroff) {
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brush.w = seek;
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draw(dpy, &brush, False, (curroff && curroff->left) ? "<" : 0);
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brush.x += brush.w;
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/* determine maximum items */
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for(i = curroff; i != nextoff; i=i->right) {
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brush.border = False;
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brush.w = textw(&brush.font, i->text);
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if(brush.w > mw / 3)
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brush.w = mw / 3;
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brush.w += brush.font.height;
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if(sel == i) {
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swap((void **)&brush.fg, (void **)&brush.bg);
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draw(dpy, &brush, True, i->text);
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swap((void **)&brush.fg, (void **)&brush.bg);
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}
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else
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draw(dpy, &brush, False, i->text);
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brush.x += brush.w;
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}
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brush.x = mw - seek;
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brush.w = seek;
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draw(dpy, &brush, False, nextoff ? ">" : 0);
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}
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XCopyArea(dpy, brush.drawable, win, brush.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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kpress(XKeyEvent * e)
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{
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KeySym ksym;
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char buf[32];
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int num, prev_nitem;
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unsigned int i, 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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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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update_items(text);
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draw_menu();
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return;
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break;
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case XK_bracketleft:
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ksym = XK_Escape;
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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 == curroff) {
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curroff = prevoff;
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update_offsets();
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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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update_items(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 == nextoff) {
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curroff = nextoff;
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update_offsets();
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}
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break;
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case XK_Return:
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if(e->state & ShiftMask) {
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if(text)
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fprintf(stdout, "%s", text);
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}
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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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done = True;
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break;
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case XK_Escape:
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ret = 1;
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done = True;
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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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update_items(text);
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} while(i && nitem && prev_nitem == nitem);
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update_items(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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update_items(text);
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}
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}
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draw_menu();
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}
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static char *
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read_allitems()
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{
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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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allitem = 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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int
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main(int argc, char *argv[])
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{
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int i;
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XSetWindowAttributes wa;
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char *maxname;
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XEvent ev;
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/* command line args */
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for(i = 1; i < argc; i++) {
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if (argv[i][0] == '-')
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switch (argv[i][1]) {
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case 'v':
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fprintf(stdout, "%s", version);
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exit(0);
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break;
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case 't':
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if(++i < argc) {
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title = argv[i];
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break;
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}
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default:
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eprint("usage: dmenu [-v] [-t <title>]\n");
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break;
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}
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else
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eprint("usage: dmenu [-v] [-t <title>]\n");
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}
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dpy = XOpenDisplay(0);
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if(!dpy)
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eprint("dmenu: cannot open dpy\n");
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screen = DefaultScreen(dpy);
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root = RootWindow(dpy, screen);
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maxname = read_allitems();
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/* grab as early as possible, but after reading all items!!! */
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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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/* style */
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loadcolors(dpy, screen, &brush, BGCOLOR, FGCOLOR, BORDERCOLOR);
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loadfont(dpy, &brush.font, 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 = texth(&brush.font);
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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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XFlush(dpy);
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/* pixmap */
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brush.gc = XCreateGC(dpy, root, 0, 0);
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brush.drawable = XCreatePixmap(dpy, win, mw, mh,
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DefaultDepth(dpy, screen));
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XFlush(dpy);
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if(maxname)
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cw = textw(&brush.font, maxname) + brush.font.height;
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if(cw > mw / 3)
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cw = mw / 3;
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if(title) {
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tw = textw(&brush.font, title) + brush.font.height;
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if(tw > mw / 3)
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tw = mw / 3;
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}
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cmdw = title ? tw : cw;
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text[0] = 0;
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update_items(text);
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XMapRaised(dpy, win);
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draw_menu();
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XFlush(dpy);
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/* main event loop */
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while(!done && !XNextEvent(dpy, &ev)) {
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switch (ev.type) {
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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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draw_menu();
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break;
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default:
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break;
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}
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}
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XUngrabKeyboard(dpy, CurrentTime);
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XFreePixmap(dpy, brush.drawable);
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XFreeGC(dpy, brush.gc);
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XDestroyWindow(dpy, win);
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XCloseDisplay(dpy);
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return ret;
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}
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