enlightenment/src/modules/conf_randr/e_smart_monitor.c

#include "e.h"
#include "e_mod_main.h"
#include "e_smart_monitor.h"

/* local structure */
typedef struct _E_Smart_Data E_Smart_Data;
struct _E_Smart_Data
{
   /* canvas variable */
   Evas *evas;

   /* geometry */
   int x, y, w, h;

   /* crtc config */
   E_Randr_Crtc_Config *crtc;

   /* output config */
   E_Randr_Output_Config *output;

   /* list of modes */
   Eina_List *modes;

   /* visibility flag */
   Eina_Bool visible : 1;
}

/* local function prototypes */
static void _e_smart_add(Evas_Object *obj);
static void _e_smart_del(Evas_Object *obj);
static void _e_smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y);
static void _e_smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h);
static void _e_smart_show(Evas_Object *obj);
static void _e_smart_hide(Evas_Object *obj);
static void _e_smart_clip_set(Evas_Object *obj, Evas_Object *clip);
static void _e_smart_clip_unset(Evas_Object *obj);

static void _e_smart_monitor_modes_fill(E_Smart_Data *sd);
static int _e_smart_monitor_modes_sort(const void *data1, const void *data2);

/* external functions exposed by this widget */
Evas_Object *
e_smart_monitor_add(Evas *evas)
{
   static Evas_Smart *smart = NULL;
   static const Evas_Smart_Class sc = 
     {
        "smart_monitor", EVAS_SMART_CLASS_VERSION, 
        _e_smart_add, _e_smart_del, _e_smart_move, _e_smart_resize, 
        _e_smart_show, _e_smart_hide, NULL, 
        _e_smart_clip_set, _e_smart_clip_unset, 
        NULL, NULL, NULL, NULL, NULL, NULL, NULL
     };

   /* if we have never created the smart class, do it now */
   if (!smart)
     if (!(smart = evas_smart_class_new(&sc)))
       return NULL;

   /* return a newly created smart randr widget */
   return evas_object_smart_add(evas, smart);
}

void 
e_smart_monitor_crtc_set(Evas_Object *obj, E_Randr_Crtc_Config *crtc)
{
   E_Smart_Data *sd;

   /* try to get the objects smart data */
   if (!(sd = evas_object_smart_data_get(obj))) return;

   /* set the crtc config */
   sd->crtc = crtc;
}

void 
e_smart_monitor_output_set(Evas_Object *obj, E_Randr_Output_Config *output)
{
   E_Smart_Data *sd;

   /* try to get the objects smart data */
   if (!(sd = evas_object_smart_data_get(obj))) return;

   /* set the output config */
   sd->output = output;

   /* since we now have the output, let's be preemptive and fill in modes */
   _e_smart_monitor_modes_fill(sd);
}

/* local functions */
static void 
_e_smart_add(Evas_Object *obj)
{
   E_Smart_Data *sd;

   /* try to allocate the smart data structure */
   if (!(sd = E_NEW(E_Smart_Data, 1))) return;

   /* grab the canvas */
   sd->evas = evas_object_evas_get(obj);

   /* set the objects smart data */
   evas_object_smart_data_set(obj, sd);
}

static void 
_e_smart_del(Evas_Object *obj)
{
   E_Smart_Data *sd;
   Ecore_X_Randr_Mode_Info *mode;

   /* try to get the objects smart data */
   if (!(sd = evas_object_smart_data_get(obj))) return;

   /* free the list of modes */
   EINA_LIST_FREE(sd->modes, mode)
     ecore_x_randr_mode_info_free(mode);

   /* try to free the allocated structure */
   E_FREE(sd);

   /* set the objects smart data to null */
   evas_object_smart_data_set(obj, NULL);
}

static void 
_e_smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
{
   E_Smart_Data *sd;

   /* try to get the objects smart data */
   if (!(sd = evas_object_smart_data_get(obj))) return;

   /* if there is no position change, then get out */
   if ((sd->x == x) && (sd->y == y)) return;

   sd->x = x;
   sd->y = y;
}

static void 
_e_smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
{
   E_Smart_Data *sd;

   /* try to get the objects smart data */
   if (!(sd = evas_object_smart_data_get(obj))) return;

   /* if there is no size change, then get out */
   if ((sd->w == w) && (sd->h == h)) return;

   sd->w = w;
   sd->h = h;
}

static void 
_e_smart_show(Evas_Object *obj)
{
   E_Smart_Data *sd;

   /* try to get the objects smart data */
   if (!(sd = evas_object_smart_data_get(obj))) return;

   /* if we are already visible, then nothing to do */
   if (sd->visible) return;

   /* set visibility flag */
   sd->visible = EINA_TRUE;
}

static void 
_e_smart_hide(Evas_Object *obj)
{
   E_Smart_Data *sd;

   /* try to get the objects smart data */
   if (!(sd = evas_object_smart_data_get(obj))) return;

   /* if we are already hidden, then nothing to do */
   if (!sd->visible) return;

   /* set visibility flag */
   sd->visible = EINA_FALSE;
}

static void 
_e_smart_clip_set(Evas_Object *obj, Evas_Object *clip)
{
   E_Smart_Data *sd;

   /* try to get the objects smart data */
   if (!(sd = evas_object_smart_data_get(obj))) return;
}

static void 
_e_smart_clip_unset(Evas_Object *obj)
{
   E_Smart_Data *sd;

   /* try to get the objects smart data */
   if (!(sd = evas_object_smart_data_get(obj))) return;
}

static void 
_e_smart_monitor_modes_fill(E_Smart_Data *sd)
{
   Ecore_X_Window root = 0;
   Ecore_X_Randr_Mode *modes;
   int num = 0, i = 0;

   /* safety check */
   if (!sd) return;

   /* try to get the root window */
   root = ecore_x_window_root_first_get();

   /* try to get the modes for this output from ecore_x_randr */
   modes = ecore_x_randr_output_modes_get(root, sd->output->xid, &num, NULL);
   if (!modes) return;

   /* loop the returned modes */
   for (i = 0; i < num; i++)
     {
        Ecore_X_Randr_Mode_Info *mode;

        /* try to get the mode info */
        if (!(mode = ecore_x_randr_mode_info_get(root, modes[i])))
          continue;

        /* append the mode info to our list of modes */
        sd->modes = eina_list_append(sd->modes, mode);
     }

   /* free any memory allocated from ecore_x_randr */
   free(modes);

   /* sort the list of modes (smallest to largest) */
   if (sd->modes)
     sd->modes = eina_list_sort(sd->modes, 0, _e_smart_monitor_modes_sort);
}

static int 
_e_smart_monitor_modes_sort(const void *data1, const void *data2)
{
   const Ecore_X_Randr_Mode_Info *m1, *m2 = NULL;

   if (!(m1 = data1)) return 1;
   if (!(m2 = data2)) return -1;

   /* second one compares to previous to determine position */
   if (m2->width < m1->width) return 1;
   if (m2->width > m1->width) return -1;

   /* width are same, compare heights */
   if ((m2->width == m1->width))
     {
        if (m2->height < m1->height) return 1;
        if (m2->height > m1->height) return -1;
     }

   return 1;
}