/* x-input.m -- event handling
 *
 * Copyright (c) 2002-2012 Apple Inc. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation files
 * (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT.  IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
 * HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name(s) of the above
 * copyright holders shall not be used in advertising or otherwise to
 * promote the sale, use or other dealings in this Software without
 * prior written authorization.
 */

#include "pbproxy.h"
#import "x-selection.h"

#include <CoreFoundation/CFSocket.h>
#include <CoreFoundation/CFRunLoop.h>

#include <X11/Xatom.h>
#include <X11/keysym.h>
#include <X11/extensions/applewm.h>

#include <unistd.h>

static CFRunLoopSourceRef xpbproxy_dpy_source;

#ifdef STANDALONE_XPBPROXY
BOOL xpbproxy_prefs_reload = NO;
#endif

/* Timestamp when the X server last told us it's active */
static Time last_activation_time;

static void
x_event_apple_wm_notify(XAppleWMNotifyEvent *e)
{
    int type = e->type - xpbproxy_apple_wm_event_base;
    int kind = e->kind;

    /* We want to reload prefs even if we're not active */
    if (type == AppleWMActivationNotify &&
        kind == AppleWMReloadPreferences)
        [xpbproxy_selection_object ()reload_preferences];

    if (![xpbproxy_selection_object ()is_active])
        return;

    switch (type) {
    case AppleWMActivationNotify:
        switch (kind) {
        case AppleWMIsActive:
            last_activation_time = e->time;
            [xpbproxy_selection_object () x_active:e->time];
            break;

        case AppleWMIsInactive:
            [xpbproxy_selection_object () x_inactive:e->time];
            break;
        }
        break;

    case AppleWMPasteboardNotify:
        switch (kind) {
        case AppleWMCopyToPasteboard:
            [xpbproxy_selection_object () x_copy:e->time];
        }
        break;
    }
}

static void
xpbproxy_process_xevents(void)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    if (pool == nil) {
        ErrorF("unable to allocate/init auto release pool!\n");
        return;
    }

    while (XPending(xpbproxy_dpy) != 0) {
        XEvent e;

        XNextEvent(xpbproxy_dpy, &e);

        switch (e.type) {
        case SelectionClear:
            if ([xpbproxy_selection_object ()is_active])
                [xpbproxy_selection_object () clear_event:&e.xselectionclear];
            break;

        case SelectionRequest:
            [xpbproxy_selection_object () request_event:&e.xselectionrequest];
            break;

        case SelectionNotify:
            [xpbproxy_selection_object () notify_event:&e.xselection];
            break;

        case PropertyNotify:
            [xpbproxy_selection_object () property_event:&e.xproperty];
            break;

        default:
            if (e.type >= xpbproxy_apple_wm_event_base &&
                e.type < xpbproxy_apple_wm_event_base +
                AppleWMNumberEvents) {
                x_event_apple_wm_notify((XAppleWMNotifyEvent *)&e);
            }
            else if (e.type == xpbproxy_xfixes_event_base +
                     XFixesSelectionNotify) {
                [xpbproxy_selection_object () xfixes_selection_notify:(
                     XFixesSelectionNotifyEvent *)&e];
            }
            break;
        }

        XFlush(xpbproxy_dpy);
    }

    [pool release];
}

static BOOL
add_input_socket(int sock, CFOptionFlags callback_types,
                 CFSocketCallBack callback, const CFSocketContext *ctx,
                 CFRunLoopSourceRef *cf_source)
{
    CFSocketRef cf_sock;

    cf_sock = CFSocketCreateWithNative(kCFAllocatorDefault, sock,
                                       callback_types, callback, ctx);
    if (cf_sock == NULL) {
        close(sock);
        return FALSE;
    }

    *cf_source = CFSocketCreateRunLoopSource(kCFAllocatorDefault,
                                             cf_sock, 0);
    CFRelease(cf_sock);

    if (*cf_source == NULL)
        return FALSE;

    CFRunLoopAddSource(CFRunLoopGetCurrent(),
                       *cf_source, kCFRunLoopDefaultMode);
    return TRUE;
}

static void
x_input_callback(CFSocketRef sock, CFSocketCallBackType type,
                 CFDataRef address, const void *data, void *info)
{

#ifdef STANDALONE_XPBPROXY
    if (xpbproxy_prefs_reload) {
        [xpbproxy_selection_object ()reload_preferences];
        xpbproxy_prefs_reload = NO;
    }
#endif

    xpbproxy_process_xevents();
}

BOOL
xpbproxy_input_register(void)
{
    return add_input_socket(ConnectionNumber(
                                xpbproxy_dpy), kCFSocketReadCallBack,
                            x_input_callback, NULL, &xpbproxy_dpy_source);
}
