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550 lines
12 KiB
550 lines
12 KiB
/* See LICENSE file for copyright and license details. */
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <X11/Xatom.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#ifdef XINERAMA
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#include <X11/extensions/Xinerama.h>
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#endif
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#include <draw.h>
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#define INRECT(x,y,rx,ry,rw,rh) ((x) >= (rx) && (x) < (rx)+(rw) && (y) >= (ry) && (y) < (ry)+(rh))
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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#define MAX(a,b) ((a) > (b) ? (a) : (b))
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#define UTF8_CODEPOINT(c) (((c) & 0xc0) != 0x80)
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typedef struct Item Item;
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struct Item {
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char *text;
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Item *next; /* traverses all items */
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Item *left, *right; /* traverses matching items */
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};
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static void appenditem(Item *item, Item **list, Item **last);
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static void calcoffsets(void);
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static char *cistrstr(const char *s, const char *sub);
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static void drawmenu(void);
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static void grabkeyboard(void);
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static void insert(const char *s, ssize_t n);
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static void keypress(XKeyEvent *e);
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static void match(void);
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static void paste(void);
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static void readstdin(void);
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static void run(void);
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static void setup(void);
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static void usage(void);
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static char text[4096];
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static size_t cursor = 0;
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static const char *prompt = NULL;
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static const char *normbgcolor = "#cccccc";
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static const char *normfgcolor = "#000000";
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static const char *selbgcolor = "#0066ff";
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static const char *selfgcolor = "#ffffff";
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static unsigned int inputw = 0;
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static unsigned int lines = 0;
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static unsigned int mw, mh;
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static unsigned int promptw;
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static unsigned long normcol[ColLast];
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static unsigned long selcol[ColLast];
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static Atom utf8;
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static Bool topbar = True;
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static DC *dc;
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static Item *allitems, *matches;
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static Item *curr, *prev, *next, *sel;
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static Window root, win;
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static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
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static char *(*fstrstr)(const char *, const char *) = strstr;
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void
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appenditem(Item *item, Item **list, Item **last) {
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if(!*last)
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*list = item;
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else
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(*last)->right = item;
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item->left = *last;
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item->right = NULL;
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*last = item;
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}
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void
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calcoffsets(void)
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{
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unsigned int h, i, n;
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h = dc->font.height+2;
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if(lines > 0)
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n = lines * h;
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else
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n = mw - (promptw + inputw + textw(dc, "<") + textw(dc, ">"));
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prev = next = curr;
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for(i = 0; next; next = next->right)
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if((i += (lines > 0) ? h : MIN(textw(dc, next->text), mw/3)) > n)
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break;
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for(i = 0; prev && prev->left; prev = prev->left)
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if((i += (lines > 0) ? h : MIN(textw(dc, prev->left->text), mw/3)) > n)
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break;
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}
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char *
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cistrstr(const char *s, const char *sub) {
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size_t len;
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for(len = strlen(sub); *s; s++)
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if(!strncasecmp(s, sub, len))
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return (char *)s;
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return NULL;
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}
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void
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drawmenu(void) {
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Item *item;
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dc->x = 0;
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dc->y = 0;
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drawrect(dc, 0, 0, mw, mh, BG(dc, normcol));
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dc->h = dc->font.height + 2;
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dc->y = topbar ? 0 : mh - dc->h;
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/* print prompt? */
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if(prompt) {
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dc->w = promptw;
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drawtext(dc, prompt, selcol);
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dc->x = dc->w;
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}
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dc->w = mw - dc->x;
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/* print input area */
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if(matches && lines == 0 && textw(dc, text) <= inputw)
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dc->w = inputw;
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drawtext(dc, text, normcol);
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drawrect(dc, textnw(dc, text, cursor) + dc->h/2 - 2, 2, 1, dc->h - 4, FG(dc, normcol));
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if(lines > 0) {
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dc->y = topbar ? dc->h : 0;
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dc->w = mw - dc->x;
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for(item = curr; item != next; item = item->right) {
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drawtext(dc, item->text, (item == sel) ? selcol : normcol);
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dc->y += dc->h;
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}
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}
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else if(curr && (dc->w == inputw || curr->next)) {
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dc->x += inputw;
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dc->w = textw(dc, "<");
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if(prev)
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drawtext(dc, "<", normcol);
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for(item = curr; item != next; item = item->right) {
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dc->x += dc->w;
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dc->w = MIN(textw(dc, item->text), mw/3);
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drawtext(dc, item->text, (item == sel) ? selcol : normcol);
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}
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dc->w = textw(dc, ">");
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dc->x = mw - dc->w;
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if(next)
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drawtext(dc, ">", normcol);
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}
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commitdraw(dc, win);
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}
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void
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grabkeyboard(void) {
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int i;
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for(i = 0; i < 1000; i++) {
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if(!XGrabKeyboard(dc->dpy, root, True, GrabModeAsync, GrabModeAsync, CurrentTime))
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return;
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usleep(1000);
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}
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eprintf("cannot grab keyboard\n");
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}
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void
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insert(const char *s, ssize_t n) {
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memmove(text + cursor + n, text + cursor, sizeof text - cursor - n);
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if(n > 0)
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memcpy(text + cursor, s, n);
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cursor += n;
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match();
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}
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void
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keypress(XKeyEvent *e) {
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char buf[sizeof text];
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int n;
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size_t len;
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KeySym ksym;
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len = strlen(text);
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XLookupString(e, buf, sizeof buf, &ksym, NULL);
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if(e->state & ControlMask) {
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switch(tolower(ksym)) {
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default:
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return;
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case XK_a:
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ksym = XK_Home;
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break;
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case XK_b:
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ksym = XK_Left;
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break;
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case XK_c:
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ksym = XK_Escape;
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break;
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case XK_e:
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ksym = XK_End;
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break;
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case XK_f:
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ksym = XK_Right;
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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_i:
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ksym = XK_Tab;
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break;
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case XK_j:
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case XK_m:
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ksym = XK_Return;
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break;
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case XK_k: /* delete right */
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text[cursor] = '\0';
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match();
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break;
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case XK_n:
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ksym = XK_Down;
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break;
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case XK_p:
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ksym = XK_Up;
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break;
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case XK_u: /* delete left */
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insert(NULL, -cursor);
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break;
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case XK_w: /* delete word */
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if(cursor == 0)
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return;
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n = 0;
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while(cursor - n++ > 0 && text[cursor - n] == ' ');
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while(cursor - n++ > 0 && text[cursor - n] != ' ');
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insert(NULL, 1-n);
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break;
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case XK_y: /* paste selection */
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XConvertSelection(dc->dpy, XA_PRIMARY, utf8, None, win, CurrentTime);
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/* causes SelectionNotify event */
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return;
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}
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}
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switch(ksym) {
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default:
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if(!iscntrl((int)*buf))
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insert(buf, MIN(strlen(buf), sizeof text - cursor));
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break;
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case XK_BackSpace:
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if(cursor == 0)
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return;
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for(n = 1; cursor - n > 0 && !UTF8_CODEPOINT(text[cursor - n]); n++);
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insert(NULL, -n);
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break;
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case XK_Delete:
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if(cursor == len)
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return;
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for(n = 1; cursor + n < len && !UTF8_CODEPOINT(text[cursor + n]); n++);
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cursor += n;
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insert(NULL, -n);
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break;
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case XK_End:
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if(cursor < len) {
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cursor = len;
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break;
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}
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while(next) {
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sel = curr = next;
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calcoffsets();
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}
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while(sel && sel->right)
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sel = sel->right;
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break;
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case XK_Escape:
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exit(EXIT_FAILURE);
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case XK_Home:
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if(sel == matches) {
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cursor = 0;
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break;
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}
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sel = curr = matches;
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calcoffsets();
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break;
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case XK_Left:
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if(cursor > 0 && (!sel || !sel->left || lines > 0)) {
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while(cursor-- > 0 && !UTF8_CODEPOINT(text[cursor]));
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break;
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}
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else if(lines > 0)
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return;
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case XK_Up:
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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_Next:
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if(!next)
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return;
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sel = curr = next;
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calcoffsets();
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break;
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case XK_Prior:
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if(!prev)
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return;
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sel = curr = prev;
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calcoffsets();
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break;
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case XK_Return:
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case XK_KP_Enter:
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fputs((sel && !(e->state & ShiftMask)) ? sel->text : text, stdout);
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fflush(stdout);
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exit(EXIT_SUCCESS);
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case XK_Right:
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if(cursor < len) {
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while(cursor++ < len && !UTF8_CODEPOINT(text[cursor]));
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break;
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}
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else if(lines > 0)
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return;
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case XK_Down:
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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_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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cursor = strlen(text);
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match();
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break;
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}
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drawmenu();
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}
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void
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match(void) {
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unsigned int len;
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Item *item, *itemend, *lexact, *lprefix, *lsubstr, *exactend, *prefixend, *substrend;
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len = strlen(text);
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matches = lexact = lprefix = lsubstr = itemend = exactend = prefixend = substrend = NULL;
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for(item = allitems; item; item = item->next)
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if(!fstrncmp(text, item->text, len + 1))
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appenditem(item, &lexact, &exactend);
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else if(!fstrncmp(text, item->text, len))
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appenditem(item, &lprefix, &prefixend);
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else if(fstrstr(item->text, text))
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appenditem(item, &lsubstr, &substrend);
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if(lexact) {
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matches = lexact;
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itemend = exactend;
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}
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if(lprefix) {
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if(itemend) {
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itemend->right = lprefix;
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lprefix->left = itemend;
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}
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else
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matches = lprefix;
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itemend = prefixend;
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}
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if(lsubstr) {
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if(itemend) {
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itemend->right = lsubstr;
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lsubstr->left = itemend;
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}
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else
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matches = lsubstr;
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}
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curr = prev = next = sel = matches;
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calcoffsets();
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}
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void
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paste(void) {
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char *p, *q;
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int di;
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unsigned long dl;
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Atom da;
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XGetWindowProperty(dc->dpy, win, utf8, 0, sizeof text - cursor, True,
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utf8, &da, &di, &dl, &dl, (unsigned char **)&p);
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insert(p, (q = strchr(p, '\n')) ? q-p : strlen(p));
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XFree(p);
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drawmenu();
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}
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void
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readstdin(void) {
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char buf[sizeof text], *p;
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Item *item, *new;
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allitems = NULL;
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for(item = NULL; fgets(buf, sizeof buf, stdin); item = new) {
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if((p = strchr(buf, '\n')))
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*p = '\0';
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if(!(new = malloc(sizeof *new)))
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eprintf("cannot malloc %u bytes\n", sizeof *new);
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if(!(new->text = strdup(buf)))
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eprintf("cannot strdup %u bytes\n", strlen(buf));
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inputw = MAX(inputw, textw(dc, new->text));
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new->next = new->left = new->right = NULL;
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if(item)
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item->next = new;
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else
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allitems = new;
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}
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}
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void
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run(void) {
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XEvent ev;
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while(!XNextEvent(dc->dpy, &ev))
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switch(ev.type) {
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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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case KeyPress:
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keypress(&ev.xkey);
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break;
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case SelectionNotify:
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if(ev.xselection.property == utf8)
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paste();
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break;
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case VisibilityNotify:
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if(ev.xvisibility.state != VisibilityUnobscured)
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XRaiseWindow(dc->dpy, win);
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break;
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}
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}
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void
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setup(void) {
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int x, y, screen;
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XSetWindowAttributes wa;
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#ifdef XINERAMA
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int n;
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XineramaScreenInfo *info;
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#endif
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screen = DefaultScreen(dc->dpy);
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root = RootWindow(dc->dpy, screen);
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utf8 = XInternAtom(dc->dpy, "UTF8_STRING", False);
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normcol[ColBG] = getcolor(dc, normbgcolor);
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normcol[ColFG] = getcolor(dc, normfgcolor);
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selcol[ColBG] = getcolor(dc, selbgcolor);
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selcol[ColFG] = getcolor(dc, selfgcolor);
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/* input window geometry */
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mh = (dc->font.height + 2) * (lines + 1);
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#ifdef XINERAMA
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if((info = XineramaQueryScreens(dc->dpy, &n))) {
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int i, di;
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unsigned int du;
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Window dw;
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XQueryPointer(dc->dpy, root, &dw, &dw, &x, &y, &di, &di, &du);
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for(i = 0; i < n; i++)
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if(INRECT(x, y, info[i].x_org, info[i].y_org, info[i].width, info[i].height))
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break;
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x = info[i].x_org;
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y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
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mw = info[i].width;
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XFree(info);
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}
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else
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#endif
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{
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x = 0;
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y = topbar ? 0 : DisplayHeight(dc->dpy, screen) - mh;
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mw = DisplayWidth(dc->dpy, screen);
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}
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/* input window */
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wa.override_redirect = True;
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wa.background_pixmap = ParentRelative;
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wa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
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win = XCreateWindow(dc->dpy, root, x, y, mw, mh, 0,
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DefaultDepth(dc->dpy, screen), CopyFromParent,
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DefaultVisual(dc->dpy, screen),
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CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
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grabkeyboard();
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setcanvas(dc, win, mw, mh);
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inputw = MIN(inputw, mw/3);
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promptw = prompt ? MIN(textw(dc, prompt), mw/5) : 0;
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XMapRaised(dc->dpy, win);
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text[0] = '\0';
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match();
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}
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void
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usage(void) {
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fputs("usage: dmenu [-b] [-i] [-l lines] [-p prompt] [-fn font] [-nb color]\n"
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" [-nf color] [-sb color] [-sf color] [-v]\n", stderr);
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exit(EXIT_FAILURE);
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}
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int
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main(int argc, char *argv[]) {
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int i;
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progname = "dmenu";
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dc = initdraw();
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for(i = 1; i < argc; i++)
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/* single flags */
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if(!strcmp(argv[i], "-v")) {
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fputs("dmenu-"VERSION", © 2006-2010 dmenu engineers, see LICENSE for details\n", stdout);
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exit(EXIT_SUCCESS);
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}
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else if(!strcmp(argv[i], "-b"))
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topbar = False;
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else if(!strcmp(argv[i], "-i")) {
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fstrncmp = strncasecmp;
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fstrstr = cistrstr;
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}
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else if(i == argc-1)
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usage();
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/* double flags */
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else if(!strcmp(argv[i], "-l"))
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lines = atoi(argv[++i]);
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else if(!strcmp(argv[i], "-p"))
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prompt = argv[++i];
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else if(!strcmp(argv[i], "-fn"))
|
|
initfont(dc, argv[i++]);
|
|
else if(!strcmp(argv[i], "-nb"))
|
|
normbgcolor = argv[++i];
|
|
else if(!strcmp(argv[i], "-nf"))
|
|
normfgcolor = argv[++i];
|
|
else if(!strcmp(argv[i], "-sb"))
|
|
selbgcolor = argv[++i];
|
|
else if(!strcmp(argv[i], "-sf"))
|
|
selfgcolor = argv[++i];
|
|
else
|
|
usage();
|
|
|
|
readstdin();
|
|
setup();
|
|
run();
|
|
|
|
return EXIT_FAILURE; /* should not reach */
|
|
}
|