/*
 * Pop-up menus.
 */

/* Copyright (c) 1994-1996 David Hogan, see README for licence details */
#define _SVID_SOURCE 1 /* putenv in glibc */
#define _DEFAULT_SOURCE 1
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/extensions/Xrandr.h>
#include "config.h"
#ifdef VIRTNOTIFY
#include <libnotify/notify.h>
#endif
#include "dat.h"
#include "fns.h"

Client* hiddenc[MAXHIDDEN];

int numhidden;

int virt;
int reversehide = 1;

Client* currents[NUMVIRTUALS] = {NULL, NULL, NULL, NULL};

char* b2items[NUMVIRTUALS + 1] = VIRTUALLIST;

Menu b2menu = {b2items};

char* b3items[B3FIXED + MAXHIDDEN + 1] = {
  "New",
  "Reshape",
  "Move",
#if defined(SHOWMAX) && defined(SHOWSTICK)
  "Maximize",
  "Stick",
#else
#ifdef SHOWMAX
  "Maximize",
#endif
#ifdef SHOWSTICK
  "Stick",
#endif
#endif
  "Delete",
  "Hide",
  0};

enum {
  New,
  Reshape,
  Move,
#if defined(SHOWMAX) && defined(SHOWSTICK)
  Maximize,
  Stick,
#else
#ifdef SHOWMAX
  Maximize,
#endif
#ifdef SHOWSTICK
  Stick,
#endif
#endif
  Delete,
  Hide
};

Menu b3menu = {b3items};

Menu egg = {version};

void button(XButtonEvent* e) {
  int n, shift;
  Client* c;
  Window dw;
  ScreenInfo* s;

#ifdef SHOWMAX
  XRRMonitorInfo monitor;
#endif

  curtime = e->time;
  s = getscreen(e->root);
  if (s == 0)
    return;
  c = getclient(e->window, 0);
  if (c) {
    if (debug)
      fprintf(
        stderr,
        "but: e x=%d y=%d c x=%d y=%d dx=%d dy=%d BORDR %d\n",
        e->x,
        e->y,
        c->x,
        c->y,
        c->dx,
        c->dy,
        BORDER);
    if (borderorient(c, e->x, e->y) != BorderUnknown) {
      switch (e->button) {
        case Button1:
        case Button2:
          reshape(c, e->button, pull, e);
          return;
        case Button3:
          move(c, Button3);
          return;
        default:
          return;
      }
    }
    e->x += c->x - BORDER;
    e->y += c->y - BORDER;
  } else if (e->window != e->root) {
    if (debug)
      fprintf(stderr, "but no client: e x=%d y=%d\n", e->x, e->y);
    XTranslateCoordinates(
      dpy,
      e->window,
      s->root,
      e->x,
      e->y,
      &e->x,
      &e->y,
      &dw);
  }
  switch (e->button) {
    case Button1:
      fflush(stdout);
      if (c) {
        if (ffm)
          XRaiseWindow(dpy, c->window);
        XMapRaised(dpy, c->parent);
        top(c);
        active(c);
      }
      return;
    case Button2:
      if (c) {
        XMapRaised(dpy, c->parent);
        active(c);
        XAllowEvents(dpy, ReplayPointer, curtime);
      } else if (
        (e->state & (ShiftMask | ControlMask)) == (ShiftMask | ControlMask)) {
        menuhit(e, &egg);
      } else if (numvirtuals > 1 && (n = menuhit(e, &b2menu)) > -1)
        button2(n);
      return;
    case Button3:
      break;
    case Button4:
      /* scroll up changes to previous virtual screen, wraps around */
      if (!c && e->type == ButtonPress) {
        if (numvirtuals > 1) {
          if (virt > 0) {
            switch_to(virt - 1);
          } else {
            switch_to(numvirtuals - 1);
          }
        }
      }
      return;
    case Button5:
      /* scroll down changes to next virtual screen, wraps around */
      if (!c && e->type == ButtonPress) {
        if (numvirtuals > 1) {
          if (virt < numvirtuals - 1) {
            switch_to(virt + 1);
          } else {
            switch_to(0);
          }
        }
      }
      return;
    default:
      return;
  }

  if (current && current->screen == s)
    cmapnofocus(s);
  switch (n = menuhit(e, &b3menu)) {
    case New:
      spawn(s);
      break;
    case Reshape:
      reshape(selectwin(1, 0, s), Button3, sweep, 0);
      break;
    case Move:
      move(selectwin(0, 0, s), Button3);
      break;
    case Delete:
      shift = 0;
      c = selectwin(1, &shift, s);
      delete (c, shift);
      break;
    case Hide:
      hide(selectwin(1, 0, s));
      break;
#ifdef SHOWMAX
    case Maximize:
      c = selectwin(1, 0, s);
#ifdef AUTOSTICK
      if (isautostick(c))
        break;
#endif
      monitor = monitorinfo[getmonitorbyclient(c)];
      quickreshape(c, monitor.x, monitor.y, monitor.width, monitor.height, 1);
      active(c);
      top(c);
      break;
#endif
#ifdef SHOWSTICK
    case Stick:
      stick(selectwin(1, 0, s));
      break;
#endif
    default: /* unhide window */
      unhide(n - B3FIXED, 1);
      break;
    case -1: /* nothing */
      break;
  }
  if (current && current->screen == s)
    cmapfocus(current);
}

void spawn(ScreenInfo* s) {
  /*
   * ugly dance to cause sweeping for terminals.
   * the very next window created will require sweeping.
   * hope it's created by the program we're about to
   * exec!
   */
  isNew = 1;
  /*
   * ugly dance to avoid leaving zombies. Could use SIGCHLD,
   * but it's not very portable.
   */
  if (fork() == 0) {
    if (fork() == 0) {
      close(ConnectionNumber(dpy));
      if (s->display[0] != '\0')
        putenv(s->display);
      signal(SIGINT, SIG_DFL);
      signal(SIGTERM, SIG_DFL);
      signal(SIGHUP, SIG_DFL);
      if (termprog != NULL) {
        execl(shell, shell, "-c", termprog, (char*)0);
        fprintf(stderr, "ryudo: exec %s", shell);
        perror(" failed");
      }
      execlp("urxvt", "urxvt", (char*)0);
      execlp("9term", "9term", scrolling ? "-ws" : "-w", (char*)0);
      execlp("xterm", "xterm", "-ut", (char*)0);
      perror("ryudo: exec urxvt/9term/xterm failed");
      exit(1);
    }
    exit(0);
  }
  wait((int*)0);
}

void reshape(
  Client* c, int but, int (*fn)(Client*, int, XButtonEvent*), XButtonEvent* e) {
  int odx, ody;

  if (c == 0)
    return;
  odx = c->dx;
  ody = c->dy;
  if (fn(c, but, e) == 0)
    return;

  c->border = BORDER;
  active(c);
  top(c);
  XRaiseWindow(dpy, c->parent);
  XMoveResizeWindow(
    dpy,
    c->parent,
    c->x - BORDER,
    c->y - BORDER,
    c->dx + 2 * BORDER,
    c->dy + 2 * BORDER);
  if (c->dx == odx && c->dy == ody)
    sendconfig(c);
  else
    XMoveResizeWindow(dpy, c->window, BORDER, BORDER, c->dx, c->dy);
}

void move(Client* c, int but) {
  if (c == 0)
    return;
  if (drag(c, but) == 0)
    return;
  c->border = BORDER;
  active(c);
  top(c);
  XRaiseWindow(dpy, c->parent);
  XMoveWindow(dpy, c->parent, c->x - c->border, c->y - c->border);
  sendconfig(c);
}

void delete (Client* c, int shift) {
  Client* revertc;
  int m;

  if (c == 0)
    return;

  if (c == current) {
    m = getmonitorbyclient(c);
    if (revertc = getclient(getrevert(c), 0)) {
      top(revertc);
      active(revertc);
    } else {
      shuffleonmonitor(m);
    }
  }

  if ((c->proto & Pdelete) && !shift)
    sendcmessage(c->window, wm_protocols, wm_delete, 0, 0);
  else
    XKillClient(dpy, c->window); /* let event clean up */
}

void hide(Client* c) {
  int monitor;
  Client* revertc;

  if (c == 0 || numhidden == MAXHIDDEN)
    return;
  if (hidden(c)) {
    fprintf(stderr, "ryudo: already hidden: %s\n", c->label);
    return;
  }
  monitor = getmonitorbyclient(c);
  XUnmapWindow(dpy, c->parent);
  XUnmapWindow(dpy, c->window);
  setstate(c, IconicState);
  if (c == current) {
    if (revertc = getclient(getrevert(c), 0)) {
      top(revertc);
      active(revertc);
    } else {
      shuffleonmonitor(monitor);
    }
  }
  if (reversehide) {
    memmove(hiddenc + 1, hiddenc, numhidden * sizeof hiddenc[0]);
    memmove(
      b3items + B3FIXED + 1,
      b3items + B3FIXED,
      numhidden * sizeof b3items[0]);
    hiddenc[0] = c;
    b3items[B3FIXED] = c->label;
  } else {
    hiddenc[numhidden] = c;
    b3items[B3FIXED + numhidden] = c->label;
  }
  numhidden++;
  b3items[B3FIXED + numhidden] = 0;
  ensureactiveonmonitor(monitor);
}

void unhide(int n, int map) {
  Client* c;
  int i;

  if (n >= numhidden) {
    fprintf(stderr, "ryudo: unhide: n %d numhidden %d\n", n, numhidden);
    return;
  }
  c = hiddenc[n];
  if (!hidden(c)) {
    fprintf(
      stderr,
      "ryudo: unhide: not hidden: %s(0x%x)\n",
      c->label,
      (int)c->window);
    return;
  }
  c->virt = virt;

  if (map) {
    XMapWindow(dpy, c->window);
    XMapRaised(dpy, c->parent);
    setstate(c, NormalState);
    active(c);
    top(c);
  }

  numhidden--;
  for (i = n; i < numhidden; i++) {
    hiddenc[i] = hiddenc[i + 1];
    b3items[B3FIXED + i] = b3items[B3FIXED + i + 1];
  }
  b3items[B3FIXED + numhidden] = 0;
}

void unhidec(Client* c, int map) {
  int i;

  for (i = 0; i < numhidden; i++)
    if (c == hiddenc[i]) {
      unhide(i, map);
      return;
    }
  fprintf(
    stderr,
    "ryudo: unhidec: not hidden: %s(0x%x)\n",
    c->label,
    (int)c->window);
}

void stick(Client* c) {
  if (numvirtuals > 1 && c->virt >= 0)
    c->virt = -1;
  else
    c->virt = virt;
}

void renamec(Client* c, char* name) {
  int i;

  if (name == 0)
    name = "???";
  c->label = name;
  if (!hidden(c))
    return;
  for (i = 0; i < numhidden; i++)
    if (c == hiddenc[i]) {
      b3items[B3FIXED + i] = name;
      return;
    }
}

void button2(int n) {
  switch_to(n);
  if (current)
    cmapfocus(current);
}

void switch_to_c(int n, Client* c) {
  if (c == 0)
    return;

  if (c->next)
    switch_to_c(n, c->next);

  if (c->parent == DefaultRootWindow(dpy))
    return;

#ifdef AUTOSTICK
  if (c->virt >= 0 && isautostick(c)) {
    stick(c);
  }
#endif

  if (c->virt != virt && c->state == NormalState && c->virt >= 0) {
    XUnmapWindow(dpy, c->parent);
    XUnmapWindow(dpy, c->window);
    setstate(c, IconicState);
    if (c == current)
      setactive(c, 0);
  } else if (c->virt == virt && c->state == IconicState) {
    int i;

    for (i = 0; i < numhidden; i++)
      if (c == hiddenc[i])
        break;

    if (i == numhidden) {
      XMapWindow(dpy, c->window);
      XMapWindow(dpy, c->parent);
      setstate(c, NormalState);
      if (currents[virt] == c)
        active(c);
      else
        setactive(c, 0);
    }
  }
}

void switch_to(int n) {
#ifdef VIRTNOTIFY
  static char virtmsg[32];
  NotifyNotification* notification =
    notify_notification_new(VIRTHEADER, NULL, NULL);
#endif
  if (n == virt)
    return;
  currents[virt] = current;
  // if current is sticky, and no current in next virt, keep this one
  if (current && current->virt == -1 && !currents[n]) {
    currents[n] = current;
  }
  virt = n;

  /* redundant when called from a menu switch
   * but needed for scroll-button switches
   */
  b2menu.lasthit = n;

  switch_to_c(n, clients);

  current = currents[virt];
  if (current) {
    active(current);
    top(current);
  } else {
    nofocus();
  }

#ifdef VIRTNOTIFY
  sprintf(virtmsg, VIRTMSG, b2items[virt]);
  notify_notification_update(notification, VIRTHEADER, virtmsg, NULL);
  notify_notification_set_category(notification, "virtual");
  notify_notification_show(notification, NULL);
  notify_notification_close(notification, NULL);
#endif
}

void initb2menu(int n) { b2items[n] = 0; }