/*
 * vim:ts=8:expandtab
 *
 * i3 - an improved dynamic tiling window manager
 *
 * (c) 2009 Michael Stapelberg and contributors
 *
 * See file LICENSE for license information.
 *
 */
#include <xcb/xcb.h>
#include <stdbool.h>

#ifndef _DATA_H
#define _DATA_H
/*
 * This file defines all data structures used by i3
 *
 */
#include "queue.h"

/* Forward definitions */
typedef struct Cell Cell;
typedef struct Font i3Font;
typedef struct Container Container;
typedef struct Client Client;
typedef struct Binding Binding;
typedef struct Workspace Workspace;
typedef struct Rect Rect;
typedef struct Screen i3Screen;

/* Helper types */
typedef enum { D_LEFT, D_RIGHT, D_UP, D_DOWN } direction_t;

enum {
        BIND_NONE = 0,
        BIND_MOD_1 = XCB_MOD_MASK_1,
        BIND_MOD_2 = XCB_MOD_MASK_2,
        BIND_MOD_3 = XCB_MOD_MASK_3,
        BIND_MOD_4 = XCB_MOD_MASK_4,
        BIND_MOD_5 = XCB_MOD_MASK_5,
        BIND_SHIFT = XCB_MOD_MASK_SHIFT,
        BIND_CONTROL = XCB_MOD_MASK_CONTROL,
        BIND_MODE_SWITCH = (1 << 8)
};

struct Rect {
        uint32_t x, y;
        uint32_t width, height;
};

struct Workspace {
        /* x, y, width, height */
        Rect rect;

        /* table dimensions */
        int cols;
        int rows;

        /* These are stored here just while this workspace is _not_ shown (see show_workspace()) */
        int current_row;
        int current_col;

        Client *fullscreen_client;

        /* Contains all clients with _NET_WM_WINDOW_TYPE == _NET_WM_WINDOW_TYPE_DOCK */
        SLIST_HEAD(dock_clients_head, Client) dock_clients;

        /* Backpointer to the screen this workspace is on */
        i3Screen *screen;

        /* This is a two-dimensional dynamic array of Container-pointers. I’ve always wanted
         * to be a three-star programmer :) */
        Container ***table;
};

/*
 * Defines a position in the table
 *
 */
struct Cell {
        int row;
        int column;
};

struct Binding {
        /* Keycode to bind */
        uint32_t keycode;
        /* Bitmask consisting of BIND_MOD_1, BIND_MODE_SWITCH, … */
        uint32_t mods;
        /* Command, like in command mode */
        char *command;

        TAILQ_ENTRY(Binding) bindings;
};

/*
 * We need to save the height of a font because it is required for each drawing of
 * text but relatively hard to get. As soon as a new font needs to be loaded, a
 * Font-entry will be filled for later use.
 *
 */
struct Font {
        /* The name of the font, that is what the pattern resolves to */
        char *name;
        /* A copy of the pattern to build a cache */
        char *pattern;
        /* The height of the font, built from font_ascent + font_descent */
        int height;
        /* The xcb-id for the font */
        xcb_font_t id;

        TAILQ_ENTRY(Font) fonts;
};

/*
 * A client is X11-speak for a window.
 *
 */
struct Client {
        /* TODO: this is NOT final */
        Cell old_position; /* if you set a client to floating and set it back to managed,
                              it does remember its old position and *tries* to get back there */

        /* Backpointer. A client is inside a container */
        Container *container;

        /* x, y, width, height */
        Rect rect;

        /* Height which was determined by reading the _NET_WM_STRUT_PARTIAL top/bottom of the screen
           reservation */
        int desired_height;

        /* Name */
        char *name;
        int name_len;

        /* fullscreen is pretty obvious */
        bool fullscreen;

        enum { TITLEBAR_TOP = 0, TITLEBAR_LEFT, TITLEBAR_RIGHT, TITLEBAR_BOTTOM, TITLEBAR_OFF } titlebar_position;

        /* If a client is set as a dock, it is placed at the very bottom of the screen and its
           requested size is used */
        bool dock;

        /* After leaving fullscreen mode, a client needs to be reconfigured (configuration =
           setting X, Y, width and height). By setting the force_reconfigure flag, render_layout()
           will reconfigure the client. */
        bool force_reconfigure;

        /* When reparenting a window, an unmap-notify is sent. As we delete windows when they’re
           unmapped, we need to ignore that one. Therefore, this flag is set when reparenting. */
        bool awaiting_useless_unmap;

        /* XCB contexts */
        xcb_window_t frame; /* Our window: The frame around the client */
        xcb_gcontext_t titlegc; /* The titlebar’s graphic context inside the frame */
        xcb_window_t child; /* The client’s window */

        /* The following entry provides the necessary list pointers to use Client with LIST_* macros */
        CIRCLEQ_ENTRY(Client) clients;
        SLIST_ENTRY(Client) dock_clients;
};

/*
 * Contains data for the windows needed to draw the titlebars on in stacking mode
 *
 */
struct Stack_Window {
        xcb_window_t window;
        xcb_gcontext_t gc;
        uint32_t width, height;

        /* Backpointer to the container this stack window is in */
        Container *container;

        SLIST_ENTRY(Stack_Window) stack_windows;
};

/*
 * A container is either in default or stacking mode. It sits inside the table.
 *
 */
struct Container {
        /* Those are speaking for themselves: */
        Client *currently_focused;
        int colspan;
        int rowspan;

        /* Position of the container inside our table */
        int row;
        int col;
        /* Xinerama: X/Y of the container */
        int x;
        int y;
        /* Width/Height of the container. Changeable by the user */
        int width;
        int height;
        float width_factor;
        float height_factor;

        /* When in stacking mode, we draw the titlebars of each client onto a separate window */
        struct Stack_Window stack_win;

        /* Backpointer to the workspace this container is in */
        Workspace *workspace;

        /* Ensure MODE_DEFAULT maps to 0 because we use calloc for initialization later */
        enum { MODE_DEFAULT = 0, MODE_STACK = 1 } mode;
        CIRCLEQ_HEAD(client_head, Client) clients;
};

struct Screen {
        /* Virtual screen number */
        int num;

        /* Current workspace selected on this virtual screen */
        int current_workspace;

        /* x, y, width, height */
        Rect rect;

        TAILQ_ENTRY(Screen) screens;
};

#endif