602 lines
14 KiB
C
602 lines
14 KiB
C
#include <err.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/Xlib.h>
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#include <X11/Xutil.h>
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/* macros */
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#define LEN(x) (sizeof (x) / sizeof (x[0]))
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/* color enum */
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enum {ColorFG, ColorBG, ColorLast};
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/* draw context structure */
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struct DC {
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unsigned long unpressed[ColorLast];
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unsigned long pressed[ColorLast];
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unsigned long decoration[ColorLast];
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Drawable d;
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GC gc;
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XFontStruct *font;
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int fonth;
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};
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/* menu geometry structure */
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struct Geometry {
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int itemb; /* item border */
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int itemw; /* item width */
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int itemh; /* item height */
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int border; /* window border width */
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int separator; /* menu separator width */
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};
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/* screen geometry structure */
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struct ScreenGeometry {
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int cursx, cursy; /* cursor position */
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int screenw, screenh; /* screen width and height */
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};
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/* menu item structure */
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struct Item {
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char *label;
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char *output;
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int y;
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int h;
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struct Item *next;
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struct Menu *submenu;
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};
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/* menu structure */
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struct Menu {
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struct Menu *parent;
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struct Item *list;
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struct Item *selected;
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int x, y, w, h;
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unsigned level;
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Drawable pixmap;
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Window win;
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};
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/* function declarations */
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static unsigned long getcolor(const char *s);
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static void setupdc(void);
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static void setupgeom(void);
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static void setupgrab(void);
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static struct Item *allocitem(const char *label, const char *output);
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static struct Menu *allocmenu(struct Menu *parent, struct Item *list, unsigned level);
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static void getmenuitem(Window win, int y, struct Menu **menu_ret, struct Item **item_ret);
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static void drawmenu(void);
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static void calcscreengeom(void);
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static void calcmenu(struct Menu *menu);
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static void setcurrmenu(struct Menu *currmenu_new);
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static void parsestdin(void);
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static void run(void);
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static void freewindow(struct Menu *menu);
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static void cleanupexit(void);
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static void usage(void);
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/* X variables */
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static Colormap colormap;
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static Display *dpy;
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static Window rootwin;
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static int screen;
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static struct DC dc;
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/* menu variables */
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static struct Menu *rootmenu = NULL;
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static struct Menu *currmenu = NULL;
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/* geometry variables */
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static struct Geometry geom;
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static struct ScreenGeometry screengeom;
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/* flag variables */
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static Bool override_redirect = True;
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#include "config.h"
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int
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main(int argc, char *argv[])
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{
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int ch;
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while ((ch = getopt(argc, argv, "w")) != -1) {
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switch (ch) {
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case 'w':
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override_redirect = False;
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break;
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default:
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usage();
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break;
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}
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}
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argc -= optind;
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argv += optind;
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/* open connection to server and set X variables */
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if ((dpy = XOpenDisplay(NULL)) == NULL)
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errx(1, "cannot open display");
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screen = DefaultScreen(dpy);
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rootwin = RootWindow(dpy, screen);
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colormap = DefaultColormap(dpy, screen);
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/* setup */
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setupdc();
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setupgeom();
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setupgrab();
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/* generate menus and recalculate them */
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parsestdin();
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if (rootmenu == NULL)
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errx(1, "no menu generated");
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calcscreengeom();
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calcmenu(rootmenu);
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/* run event loop */
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run();
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return 1; /* UNREACHABLE */
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}
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/* get color from color string */
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static unsigned long
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getcolor(const char *s)
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{
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XColor color;
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if(!XAllocNamedColor(dpy, colormap, s, &color, &color))
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errx(1, "cannot allocate color: %s", s);
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return color.pixel;
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}
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/* init draw context */
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static void
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setupdc(void)
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{
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/* get color pixels */
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dc.unpressed[ColorBG] = getcolor(UNPRESSEDBG);
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dc.unpressed[ColorFG] = getcolor(UNPRESSEDFG);
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dc.pressed[ColorBG] = getcolor(PRESSEDBG);
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dc.pressed[ColorFG] = getcolor(PRESSEDFG);
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dc.decoration[ColorBG] = getcolor(DECORATIONBG);
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dc.decoration[ColorFG] = getcolor(DECORATIONFG);
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/* try to get font */
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if ((dc.font = XLoadQueryFont(dpy, FONT)) == NULL)
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errx(1, "cannot load font");
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dc.fonth = dc.font->ascent + dc.font->descent;
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/* create GC and set its font */
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dc.gc = XCreateGC(dpy, rootwin, 0, NULL);
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XSetFont(dpy, dc.gc, dc.font->fid);
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}
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/* init menu geometry values */
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static void
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setupgeom(void)
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{
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geom.itemb = ITEMB;
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geom.itemh = dc.fonth + ITEMB * 2;
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geom.itemw = ITEMW;
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geom.border = BORDER;
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geom.separator = SEPARATOR;
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}
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/* grab pointer */
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static void
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setupgrab(void)
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{
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XGrabPointer(dpy, rootwin, True, ButtonPressMask | ButtonReleaseMask,
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GrabModeAsync, GrabModeAsync, None, None, CurrentTime);
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}
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/* allocate an item */
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static struct Item *
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allocitem(const char *label, const char *output)
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{
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struct Item *item;
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if ((item = malloc(sizeof *item)) == NULL)
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err(1, "malloc");
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if (*label == '\0') {
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item->label = NULL;
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item->output = NULL;
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} else {
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if ((item->label = strdup(label)) == NULL)
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err(1, "strdup");
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if ((item->output = strdup(output)) == NULL)
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err(1, "strdup");
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}
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item->y = 0;
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item->h = item->label ? geom.itemh : geom.separator;
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item->next = NULL;
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item->submenu = NULL;
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return item;
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}
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/* allocate a menu */
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static struct Menu *
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allocmenu(struct Menu *parent, struct Item *list, unsigned level)
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{
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XSetWindowAttributes swa;
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struct Menu *menu;
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if ((menu = malloc(sizeof *menu)) == NULL)
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err(1, "malloc");
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menu->parent = parent;
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menu->list = list;
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menu->selected = NULL;
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menu->w = geom.itemw;
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menu->h = 0; /* calculated by calcmenu() */
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menu->x = 0; /* calculated by calcmenu() */
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menu->y = 0; /* calculated by calcmenu() */
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menu->level = level;
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swa.override_redirect = override_redirect;
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swa.background_pixel = dc.decoration[ColorBG];
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swa.border_pixel = dc.decoration[ColorFG];
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swa.event_mask = ExposureMask | KeyPressMask | ButtonPressMask | ButtonReleaseMask
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| PointerMotionMask | LeaveWindowMask;
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menu->win = XCreateWindow(dpy, rootwin, 0, 0, geom.itemw, geom.itemh, geom.border,
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CopyFromParent, CopyFromParent, CopyFromParent,
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CWOverrideRedirect | CWBackPixel | CWBorderPixel | CWEventMask,
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&swa);
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return menu;
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}
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/* create menus and items from the stdin */
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static void
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parsestdin(void)
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{
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char *s, buf[BUFSIZ];
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char *label, *output;
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unsigned level = 0;
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unsigned i;
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struct Item *curritem = NULL; /* item currently being read */
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struct Menu *prevmenu = NULL; /* menu the previous item was added to */
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struct Item *item; /* dummy item for for loops */
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struct Menu *menu; /* dummy menu for for loops */
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size_t count = 0; /* number of items in the current menu */
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while (fgets(buf, BUFSIZ, stdin) != NULL) {
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level = 0;
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s = buf;
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while (*s == '\t') {
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level++;
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s++;
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}
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label = output = s;
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while (*s != '\0' && *s != '\t' && *s != '\n')
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s++;
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while (*s == '\t')
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*s++ = '\0';
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if (*s != '\0' && *s != '\n')
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output = s;
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while (*s != '\0' && *s != '\n')
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s++;
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if (*s == '\n')
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*s = '\0';
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curritem = allocitem(label, output);
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if (prevmenu == NULL) { /* there is no menu yet */
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menu = allocmenu(NULL, curritem, level);
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rootmenu = menu;
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prevmenu = menu;
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count = 1;
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} else if (level < prevmenu->level) { /* item is continuation of a parent menu*/
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for (menu = prevmenu, i = level;
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menu != NULL && i < prevmenu->level;
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menu = menu->parent, i++)
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;
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if (menu == NULL)
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errx(1, "reached NULL menu");
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for (item = menu->list; item->next != NULL; item = item->next)
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;
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item->next = curritem;
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prevmenu = menu;
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} else if (level == prevmenu->level) { /* item is a continuation of current menu */
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for (item = prevmenu->list; item->next != NULL; item = item->next)
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;
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item->next = curritem;
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} else if (level > prevmenu->level) { /* item begins a new menu */
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menu = allocmenu(prevmenu, curritem, level);
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for (item = prevmenu->list; item->next != NULL; item = item->next)
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;
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item->submenu = menu;
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prevmenu = menu;
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}
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count++;
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}
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}
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/* calculate screen geometry */
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static void
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calcscreengeom(void)
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{
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Window w1, w2; /* unused variables */
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int a, b; /* unused variables */
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unsigned mask; /* unused variable */
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XQueryPointer(dpy, rootwin, &w1, &w2, &screengeom.cursx, &screengeom.cursy, &a, &b, &mask);
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screengeom.screenw = DisplayWidth(dpy, screen);
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screengeom.screenh = DisplayHeight(dpy, screen);
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}
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/* recursivelly calculate height and position of the menus */
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static void
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calcmenu(struct Menu *menu)
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{
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XWindowChanges changes;
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XSizeHints sizeh;
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struct Item *item;
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/* calculate items positions and menu height */
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for (item = menu->list; item != NULL; item = item->next) {
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item->y = menu->h;
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if (item->label == NULL) /* height for separator item */
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menu->h += geom.separator;
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else
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menu->h += geom.itemh;
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}
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/* calculate menu's x and y positions */
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if (menu->parent == NULL) { /* if root menu, calculate in respect to cursor */
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if (screengeom.screenw - screengeom.cursx >= menu->w)
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menu->x = screengeom.cursx;
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else if (screengeom.cursx > menu->w)
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menu->x = screengeom.cursx - menu->w;
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if (screengeom.screenh - screengeom.cursy >= menu->h)
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menu->y = screengeom.cursy;
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else if (screengeom.screenh > menu->h)
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menu->y = screengeom.screenh - menu->h;
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} else { /* else, calculate in respect to parent menu */
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/* search for the item in parent menu that generates this menu */
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for (item = menu->parent->list; item->submenu != menu; item = item->next)
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;
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if (screengeom.screenw - (menu->parent->x + menu->parent->w) >= menu->w)
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menu->x = menu->parent->x + menu->parent->w;
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else if (menu->parent->x > menu->w)
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menu->x = menu->parent->x - menu->w;
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if (screengeom.screenh - (item->y + menu->parent->y) > menu->h)
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menu->y = item->y + menu->parent->y;
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else if (screengeom.screenh - menu->parent->y > menu->h)
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menu->y = menu->parent->y;
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else if (screengeom.screenh > menu->h)
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menu->y = screengeom.screenh - menu->h;
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}
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/* update menu geometry */
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changes.height = menu->h;
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changes.x = menu->x;
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changes.y = menu->y;
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XConfigureWindow(dpy, menu->win, CWHeight | CWX | CWY, &changes);
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/* set window manager size hints */
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sizeh.flags = PMaxSize | PMinSize;
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sizeh.min_width = sizeh.max_width = menu->w;
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sizeh.min_height = sizeh.max_height = menu->h;
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XSetWMNormalHints(dpy, menu->win, &sizeh);
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/* create pixmap */
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menu->pixmap = XCreatePixmap(dpy, menu->win, menu->w, menu->h,
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DefaultDepth(dpy, screen));
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/* calculate positions of submenus */
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for (item = menu->list; item != NULL; item = item->next) {
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if (item->submenu != NULL)
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calcmenu(item->submenu);
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}
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}
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/* get menu and item of given window and position */
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static void
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getmenuitem(Window win, int y,
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struct Menu **menu_ret, struct Item **item_ret)
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{
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struct Menu *menu = NULL;
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struct Item *item = NULL;
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for (menu = currmenu; menu != NULL; menu = menu->parent) {
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if (menu->win == win) {
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for (item = menu->list; item != NULL; item = item->next) {
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if (y >= item->y && y <= item->y + item->h) {
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goto done;
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}
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}
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}
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}
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done:
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*menu_ret = menu;
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*item_ret = item;
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}
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/* set currentmenu to menu, umap previous menus and map current menu and its parents */
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static void
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setcurrmenu(struct Menu *currmenu_new)
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{
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struct Menu *menu;
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if (currmenu_new == currmenu)
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return;
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for (menu = currmenu; menu != NULL; menu = menu->parent) {
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XUnmapWindow(dpy, menu->win);
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}
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currmenu = currmenu_new;
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for (menu = currmenu; menu != NULL; menu = menu->parent)
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XMapWindow(dpy, menu->win);
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}
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/* draw items of the current menu and of its ancestors */
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static void
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drawmenu(void)
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{
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struct Menu *menu;
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struct Item *item;
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for (menu = currmenu; menu != NULL; menu = menu->parent) {
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for (item = menu->list; item != NULL; item = item->next) {
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unsigned long *color;
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size_t labellen;
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int labelx, labely;
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/* determine item color */
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if (item->label == NULL)
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color = dc.decoration;
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else if (item == menu->selected)
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color = dc.pressed;
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else
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color = dc.unpressed;
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/* draw item box */
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XSetForeground(dpy, dc.gc, color[ColorBG]);
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XFillRectangle(dpy, menu->pixmap, dc.gc, 0, item->y,
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geom.itemw, item->h);
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/* continue if item is a separator */
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if (item->label == NULL)
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continue;
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/* draw item label */
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labellen = strlen(item->label);
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labelx = 0 + dc.fonth;
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labely = item->y + dc.fonth + geom.itemb;
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XSetForeground(dpy, dc.gc, color[ColorFG]);
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XDrawString(dpy, menu->pixmap, dc.gc, labelx, labely, item->label, labellen);
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/* draw triangle, if item contains a submenu */
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if (item->submenu != NULL) {
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int trianglex = geom.itemw - (geom.itemb + dc.fonth);
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int triangley = item->y + geom.itemb;
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XPoint triangle[] = {
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{trianglex, triangley},
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{trianglex + dc.fonth, triangley + dc.fonth/2},
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{trianglex, triangley + dc.fonth},
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{trianglex, triangley}
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};
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XFillPolygon(dpy, menu->pixmap, dc.gc, triangle, LEN(triangle),
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Convex, CoordModeOrigin);
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}
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XCopyArea(dpy, menu->pixmap, menu->win, dc.gc, 0, item->y,
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menu->w, item->h, 0, item->y);
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}
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}
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}
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/* run event loop */
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static void
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run(void)
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{
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struct Menu *menu;
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struct Item *item;
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struct Item *previtem = NULL;
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XEvent ev;
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setcurrmenu(rootmenu);
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while (!XNextEvent(dpy, &ev)) {
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switch(ev.type) {
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case Expose:
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drawmenu();
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break;
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case MotionNotify:
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getmenuitem(ev.xbutton.window, ev.xbutton.y, &menu, &item);
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if (menu != NULL && item != NULL) {
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if (previtem != item) {
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if (item->submenu != NULL)
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setcurrmenu(item->submenu);
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else
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setcurrmenu(menu);
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previtem = item;
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} else if (menu->selected != item)
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menu->selected = item;
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drawmenu();
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}
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break;
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case ButtonRelease:
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getmenuitem(ev.xbutton.window, ev.xbutton.y, &menu, &item);
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if (menu != NULL && item != NULL) {
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if (item->label == NULL)
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break; /* ignore separators */
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if (item->submenu != NULL) {
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setcurrmenu(item->submenu);
|
|
} else {
|
|
printf("%s\n", item->output);
|
|
cleanupexit();
|
|
}
|
|
drawmenu();
|
|
} else {
|
|
cleanupexit();
|
|
}
|
|
break;
|
|
case LeaveNotify:
|
|
currmenu->selected = NULL;
|
|
drawmenu();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* recursivelly free a pixmap */
|
|
static void
|
|
freewindow(struct Menu *menu)
|
|
{
|
|
struct Item *item;
|
|
|
|
for (item = menu->list; item != NULL; item = item->next)
|
|
if (item->submenu != NULL)
|
|
freewindow(item->submenu);
|
|
|
|
XFreePixmap(dpy, menu->pixmap);
|
|
XDestroyWindow(dpy, menu->win);
|
|
}
|
|
|
|
/* cleanup and exit */
|
|
static void
|
|
cleanupexit(void)
|
|
{
|
|
freewindow(rootmenu);
|
|
XFreeFont(dpy, dc.font);
|
|
XFreeGC(dpy, dc.gc);
|
|
XCloseDisplay(dpy);
|
|
exit(0);
|
|
}
|
|
|
|
/* show usage */
|
|
static void
|
|
usage(void)
|
|
{
|
|
(void)fprintf(stderr, "usage: xmenu [-w] menuname\n");
|
|
exit(1);
|
|
}
|