#include "kernel/openbox.h"
#include "kernel/dispatch.h"
#include "kernel/action.h"
#include "kernel/event.h"
#include "kernel/client.h"
#include "kernel/prop.h"
#include "kernel/grab.h"
#include "kernel/frame.h"
#include "parser/parse.h"
#include "translate.h"
#include "mouse.h"
#include <glib.h>

static int threshold;
static int dclicktime;
/*

<context name="Titlebar"> 
  <mousebind button="Left" action="Press">
    <action name="Raise"></action>
  </mousebind>
</context>

*/

static void parse_xml(xmlDocPtr doc, xmlNodePtr node, void *d)
{
    xmlNodePtr n, nbut, nact;
    char *buttonstr;
    char *contextstr;
    MouseAction mact;
    Action *action;

    if ((n = parse_find_node("dragThreshold", node)))
        threshold = parse_int(doc, n);
    if ((n = parse_find_node("doubleClickTime", node)))
        dclicktime = parse_int(doc, n);

    n = parse_find_node("context", node);
    while (n) {
        if (!parse_attr_string("name", n, &contextstr))
            goto next_n;
        nbut = parse_find_node("mousebind", n->xmlChildrenNode);
        while (nbut) {
            if (!parse_attr_string("button", nbut, &buttonstr))
                goto next_nbut;
            if (parse_attr_contains("press", nbut, "action"))
                mact = MouseAction_Press;
            else if (parse_attr_contains("release", nbut, "action"))
                mact = MouseAction_Release;
            else if (parse_attr_contains("click", nbut, "action"))
                mact = MouseAction_Click;
            else if (parse_attr_contains("doubleclick", nbut,"action"))
                mact = MouseAction_DClick;
            else if (parse_attr_contains("drag", nbut, "action"))
                mact = MouseAction_Motion;
            else
                goto next_nbut;
            nact = parse_find_node("action", nbut->xmlChildrenNode);
            while (nact) {
                if ((action = action_parse(doc, nact))) {
                    /* validate that its okay for a mouse binding*/
                    if (mact == MouseAction_Motion) {
                        if (action->func != action_moveresize ||
                            action->data.moveresize.corner ==
                            prop_atoms.net_wm_moveresize_move_keyboard ||
                            action->data.moveresize.corner ==
                            prop_atoms.net_wm_moveresize_size_keyboard) {
                            action_free(action);
                            action = NULL;
                        }
                    } else {
                        if (action->func == action_moveresize &&
                            action->data.moveresize.corner !=
                            prop_atoms.net_wm_moveresize_move_keyboard &&
                            action->data.moveresize.corner !=
                            prop_atoms.net_wm_moveresize_size_keyboard) {
                            action_free(action);
                            action = NULL;
                        }
                    }
                    if (action)
                        mbind(buttonstr, contextstr, mact, action);
                }
                nact = parse_find_node("action", nact->next);
            }
            g_free(buttonstr);
        next_nbut:
            nbut = parse_find_node("mousebind", nbut->next);
        }
        g_free(contextstr);
    next_n:
        n = parse_find_node("context", n->next);
    }
}

void plugin_setup_config()
{
    threshold = 3;
    dclicktime = 200;
    parse_register("mouse", parse_xml, NULL);
}

/* Array of GSList*s of PointerBinding*s. */
static GSList *bound_contexts[NUM_CONTEXTS];

static void grab_for_client(Client *client, gboolean grab)
{
    int i;
    GSList *it;

    for (i = 0; i < NUM_CONTEXTS; ++i)
        for (it = bound_contexts[i]; it != NULL; it = it->next) {
            /* grab/ungrab the button */
            MouseBinding *b = it->data;
            Window win;
            int mode;
            unsigned int mask;

            if (i == Context_Frame) {
                win = client->frame->window;
                mode = GrabModeAsync;
                mask = ButtonPressMask | ButtonMotionMask | ButtonReleaseMask;
            } else if (i == Context_Client) {
                win = client->frame->plate;
                mode = GrabModeSync; /* this is handled in event */
                mask = ButtonPressMask; /* can't catch more than this with Sync
                                           mode the release event is
                                           manufactured in event() */
            } else continue;

            if (grab)
                grab_button_full(b->button, b->state, win, mask, mode, None);
            else
                ungrab_button(b->button, b->state, win);
        }
}

static void grab_all_clients(gboolean grab)
{
    GList *it;

    for (it = client_list; it != NULL; it = it->next)
	grab_for_client(it->data, grab);
}

static void clearall()
{
    int i;
    GSList *it;
    
    for(i = 0; i < NUM_CONTEXTS; ++i) {
        for (it = bound_contexts[i]; it != NULL; it = it->next) {
            int j;

            MouseBinding *b = it->data;
            for (j = 0; j < NUM_MOUSEACTION; ++j) {
                GSList *it;
                for (it = b->actions[j]; it; it = it->next) {
                    action_free(it->data);
                }
                g_slist_free(b->actions[j]);
            }
            g_free(b);
        }
        g_slist_free(bound_contexts[i]);
    }
}

static void fire_button(MouseAction a, Context context, Client *c, guint state,
                        guint button, int x, int y)
{
    GSList *it;
    MouseBinding *b;

    for (it = bound_contexts[context]; it != NULL; it = it->next) {
        b = it->data;
        if (b->state == state && b->button == button)
            break;
    }
    /* if not bound, then nothing to do! */
    if (it == NULL) return;

    for (it = b->actions[a]; it; it = it->next) {
        Action *act = it->data;
        if (act->func != NULL) {
            act->data.any.c = c;

            g_assert(act->func != action_moveresize);

            if (act->func == action_showmenu) {
                act->data.showmenu.x = x;
                act->data.showmenu.y = y;
            }

            act->func(&act->data);
        }
    }
}

static void fire_motion(MouseAction a, Context context, Client *c,
                        guint state, guint button, int x_root, int y_root,
                        guint32 corner)
{
    GSList *it;
    MouseBinding *b;

    for (it = bound_contexts[context]; it != NULL; it = it->next) {
        b = it->data;
        if (b->state == state && b->button == button)
		break;
    }
    /* if not bound, then nothing to do! */
    if (it == NULL) return;

    for (it = b->actions[a]; it; it = it->next) {
        Action *act = it->data;
        if (act->func != NULL) {
            act->data.any.c = c;

            if (act->func == action_moveresize) {
                act->data.moveresize.x = x_root;
                act->data.moveresize.y = y_root;
                act->data.moveresize.button = button;
                if (!(act->data.moveresize.corner ==
                      prop_atoms.net_wm_moveresize_move ||
                      act->data.moveresize.corner ==
                      prop_atoms.net_wm_moveresize_move_keyboard ||
                      act->data.moveresize.corner ==
                      prop_atoms.net_wm_moveresize_size_keyboard))
                    act->data.moveresize.corner = corner;
            } else
                g_assert_not_reached();

            act->func(&act->data);
        }
    }
}

static guint32 pick_corner(int x, int y, int cx, int cy, int cw, int ch)
{
    if (x - cx < cw / 2) {
        if (y - cy < ch / 2)
            return prop_atoms.net_wm_moveresize_size_topleft;
        else
            return prop_atoms.net_wm_moveresize_size_bottomleft;
    } else {
        if (y - cy < ch / 2)
            return prop_atoms.net_wm_moveresize_size_topright;
        else
            return prop_atoms.net_wm_moveresize_size_bottomright;
    }
}

static void event(ObEvent *e, void *foo)
{
    static Time ltime;
    static guint button = 0, state = 0, lbutton = 0;
    static int px, py;
    gboolean click = FALSE;
    gboolean dclick = FALSE;
    Context context;
    
    switch (e->type) {
    case Event_Client_Mapped:
        grab_for_client(e->data.c.client, TRUE);
        break;

    case Event_Client_Destroy:
        grab_for_client(e->data.c.client, FALSE);
        break;

    case Event_X_ButtonPress:
        context = frame_context(e->data.x.client,
                                e->data.x.e->xbutton.window);

        if (!button) {
            px = e->data.x.e->xbutton.x_root;
            py = e->data.x.e->xbutton.y_root;
            button = e->data.x.e->xbutton.button;
            state = e->data.x.e->xbutton.state;
        }

        fire_button(MouseAction_Press, context,
                    e->data.x.client, e->data.x.e->xbutton.state,
                    e->data.x.e->xbutton.button,
                    e->data.x.e->xbutton.x_root, e->data.x.e->xbutton.y_root);

        if (context == Context_Client) {
            /* Replay the event, so it goes to the client*/
            XAllowEvents(ob_display, ReplayPointer, event_lasttime);
            /* Fall through to the release case! */
        } else
            break;

    case Event_X_ButtonRelease:
        context = frame_context(e->data.x.client,
                                e->data.x.e->xbutton.window);
        if (e->data.x.e->xbutton.button == button) {
            /* clicks are only valid if its released over the window */
            int junk1, junk2;
            Window wjunk;
            guint ujunk, b, w, h;
            XGetGeometry(ob_display, e->data.x.e->xbutton.window,
                         &wjunk, &junk1, &junk2, &w, &h, &b, &ujunk);
            if (e->data.x.e->xbutton.x >= (signed)-b &&
                e->data.x.e->xbutton.y >= (signed)-b &&
                e->data.x.e->xbutton.x < (signed)(w+b) &&
                e->data.x.e->xbutton.y < (signed)(h+b)) {
                click = TRUE;
                /* double clicks happen if there were 2 in a row! */
                if (lbutton == button &&
                    e->data.x.e->xbutton.time - dclicktime <= ltime) {
                    dclick = TRUE;
                    lbutton = 0;
                } else
                    lbutton = button;
            } else
                lbutton = 0;

            button = 0;
            state = 0;
            ltime = e->data.x.e->xbutton.time;
        }
        fire_button(MouseAction_Release, context,
                    e->data.x.client, e->data.x.e->xbutton.state,
                    e->data.x.e->xbutton.button,
                    e->data.x.e->xbutton.x_root, e->data.x.e->xbutton.y_root);
        if (click)
            fire_button(MouseAction_Click, context,
                        e->data.x.client, e->data.x.e->xbutton.state,
                        e->data.x.e->xbutton.button,
                        e->data.x.e->xbutton.x_root,
                        e->data.x.e->xbutton.y_root);
        if (dclick)
            fire_button(MouseAction_DClick, context,
                        e->data.x.client, e->data.x.e->xbutton.state,
                        e->data.x.e->xbutton.button,
                        e->data.x.e->xbutton.x_root,
                        e->data.x.e->xbutton.y_root);
        break;

    case Event_X_MotionNotify:
        if (button) {
            if (ABS(e->data.x.e->xmotion.x_root - px) >= threshold ||
                ABS(e->data.x.e->xmotion.y_root - py) >= threshold) {
                guint32 corner;

                context = frame_context(e->data.x.client,
                                        e->data.x.e->xmotion.window);

                /* You can't drag on buttons */
                if (context == Context_Maximize ||
                    context == Context_AllDesktops ||
                    context == Context_Shade ||
                    context == Context_Iconify ||
                    context == Context_Icon ||
                    context == Context_Close)
                    break;

                if (!e->data.x.client)
                    corner = prop_atoms.net_wm_moveresize_size_bottomright;
                else
                    corner =
                        pick_corner(e->data.x.e->xmotion.x_root,
                                    e->data.x.e->xmotion.y_root,
                                    e->data.x.client->frame->area.x,
                                    e->data.x.client->frame->area.y,
                                    /* use the client size because the frame
                                       can be differently sized (shaded
                                       windows) and we want this based on the
                                       clients size */
                                    e->data.x.client->area.width +
                                    e->data.x.client->frame->size.left +
                                    e->data.x.client->frame->size.right,
                                    e->data.x.client->area.height +
                                    e->data.x.client->frame->size.top +
                                    e->data.x.client->frame->size.bottom);
                fire_motion(MouseAction_Motion, context,
                            e->data.x.client, state, button,
                            e->data.x.e->xmotion.x_root, 
                            e->data.x.e->xmotion.y_root, corner);
                button = 0;
                state = 0;
            }
        }
        break;

    default:
        g_assert_not_reached();
    }
}

gboolean mbind(char *buttonstr, char *contextstr, MouseAction mact,
               Action *action)
{
    guint state, button;
    Context context;
    MouseBinding *b;
    GSList *it;

    if (!translate_button(buttonstr, &state, &button)) {
        g_warning("invalid button '%s'", buttonstr);
        return FALSE;
    }

    contextstr = g_ascii_strdown(contextstr, -1);
    context = frame_context_from_string(contextstr);
    if (!context) {
        g_warning("invalid context '%s'", contextstr);
        g_free(contextstr);
        return FALSE;
    }
    g_free(contextstr);

    for (it = bound_contexts[context]; it != NULL; it = it->next){
	b = it->data;
	if (b->state == state && b->button == button) {
            b->actions[mact] = g_slist_append(b->actions[mact], action);
            return TRUE;
	}
    }

    grab_all_clients(FALSE);

    /* add the binding */
    b = g_new0(MouseBinding, 1);
    b->state = state;
    b->button = button;
    b->actions[mact] = g_slist_append(NULL, action);
    bound_contexts[context] = g_slist_append(bound_contexts[context], b);

    grab_all_clients(TRUE);

    return TRUE;
}

void plugin_startup()
{
    dispatch_register(Event_Client_Mapped | Event_Client_Destroy |
                      Event_X_ButtonPress | Event_X_ButtonRelease |
                      Event_X_MotionNotify, (EventHandler)event, NULL);
}

void plugin_shutdown()
{
    dispatch_register(0, (EventHandler)event, NULL);

    grab_all_clients(FALSE);
    clearall();
}