/*
 * vim:ts=4:sw=4:expandtab
 *
 * i3 - an improved dynamic tiling window manager
 * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
 *
 * scratchpad.c: Moving windows to the scratchpad and making them visible again.
 *
 */
#include "all.h"

/*
 * Moves the specified window to the __i3_scratch workspace, making it floating
 * and setting the appropriate scratchpad_state.
 *
 * Gets called upon the command 'move scratchpad'.
 *
 */
void scratchpad_move(Con *con) {
    if (con->type == CT_WORKSPACE) {
        LOG("'move scratchpad' used on a workspace \"%s\". Calling it "
            "recursively on all windows on this workspace.\n", con->name);
        Con *current;
        current = TAILQ_FIRST(&(con->focus_head));
        while (current) {
            Con *next = TAILQ_NEXT(current, focused);
            scratchpad_move(current);
            current = next;
        }
        return;
    }
    DLOG("should move con %p to __i3_scratch\n", con);

    Con *__i3_scratch = workspace_get("__i3_scratch", NULL);
    if (con_get_workspace(con) == __i3_scratch) {
        DLOG("This window is already on __i3_scratch.\n");
        return;
    }

    /* 1: Ensure the window is floating. From now on, we deal with the
     * CT_FLOATING_CON. We use automatic == false because the user made the
     * choice that this window should be a scratchpad (and floating). */
    floating_enable(con, false);
    con = con->parent;

    /* 2: Send the window to the __i3_scratch workspace, mainting its
     * coordinates and not warping the pointer. */
    Con *focus_next = con_next_focused(con);
    con_move_to_workspace(con, __i3_scratch, true, true);

    /* 3: If this is the first time this window is used as a scratchpad, we set
     * the scratchpad_state to SCRATCHPAD_FRESH. The window will then be
     * adjusted in size according to what the user specifies. */
    if (con->scratchpad_state == SCRATCHPAD_NONE) {
        DLOG("This window was never used as a scratchpad before.\n");
        con->scratchpad_state = SCRATCHPAD_FRESH;
    }

    /* 4: Fix focus. Normally, when moving a window to a different output, the
     * destination output gets focused. In this case, we don’t want that. */
    con_focus(focus_next);
}

/*
 * Either shows the top-most scratchpad window (con == NULL) or shows the
 * specified con (if it is scratchpad window).
 *
 * When called with con == NULL and the currently focused window is a
 * scratchpad window, this serves as a shortcut to hide it again (so the user
 * can press the same key to quickly look something up).
 *
 */
void scratchpad_show(Con *con) {
    DLOG("should show scratchpad window %p\n", con);
    Con *__i3_scratch = workspace_get("__i3_scratch", NULL);
    Con *floating;

    /* If this was 'scratchpad show' without criteria, we check if the
     * currently focused window is a scratchpad window and should be hidden
     * again. */
    if (!con &&
        (floating = con_inside_floating(focused)) &&
        floating->scratchpad_state != SCRATCHPAD_NONE) {
        DLOG("Focused window is a scratchpad window, hiding it.\n");
        scratchpad_move(focused);
        return;
    }

    /* If this was 'scratchpad show' with criteria, we check if it matches a
     * currently visible scratchpad window and hide it. */
    if (con &&
        (floating = con_inside_floating(con)) &&
        floating->scratchpad_state != SCRATCHPAD_NONE &&
        con_get_workspace(con) != __i3_scratch) {
        DLOG("Window is a scratchpad window, hiding it.\n");
        scratchpad_move(con);
        return;
    }

    Con *ws = con_get_workspace(focused);
    if (con == NULL) {
        /* Use the container on __i3_scratch which is highest in the focus
         * stack. When moving windows to __i3_scratch, they get inserted at the
         * bottom of the stack. */
        con = TAILQ_FIRST(&(__i3_scratch->floating_head));

        if (!con) {
            LOG("You don't have any scratchpad windows yet.\n");
            LOG("Use 'move scratchpad' to move a window to the scratchpad.\n");
            return;
        }
    }

    /* 1: Move the window from __i3_scratch to the current workspace. */
    con_move_to_workspace(con, ws, true, false);

    /* 2: Adjust the size if this window was not adjusted yet. */
    if (con->scratchpad_state == SCRATCHPAD_FRESH) {
        DLOG("Adjusting size of this window.\n");
        Con *output = con_get_output(con);
        con->rect.width = output->rect.width * 0.5;
        con->rect.height = output->rect.height * 0.75;
        con->rect.x = output->rect.x +
                      ((output->rect.width / 2.0) - (con->rect.width / 2.0));
        con->rect.y = output->rect.y +
                      ((output->rect.height / 2.0) - (con->rect.height / 2.0));
        con->scratchpad_state = SCRATCHPAD_CHANGED;
    }

    con_focus(con_descend_focused(con));
}