forked from enlightenment/efl
394 lines
13 KiB
C
394 lines
13 KiB
C
#define EFL_GFX_SIZE_HINT_PROTECTED
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#include "efl_ui_box_private.h"
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// FIXME: Aspect support is not implemented
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// FIXME: handle RTL? just invert the horizontal order?
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typedef struct _Item_Calc Item_Calc;
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struct _Item_Calc
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{
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Evas_Object *obj;
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double weight[2];
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double align[2];
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Eina_Size2D max, want, aspect;
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int pad[4];
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Efl_Gfx_Size_Hint_Aspect aspect_type;
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int id;
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};
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void
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_efl_ui_box_custom_layout(Efl_Ui_Box *ui_box, Evas_Object_Box_Data *bd)
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{
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Efl_Ui_Box_Data *pd = efl_data_scope_get(ui_box, EFL_UI_BOX_CLASS);
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Evas_Object_Box_Option *opt;
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Evas_Object *o;
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Eina_List *li;
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int wantw = 0, wanth = 0; // requested size
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int boxx, boxy, boxw, boxh;
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Item_Calc *items, *item;
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Eina_Bool horiz = efl_ui_dir_is_horizontal(pd->dir, EINA_FALSE);
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Eina_Bool zeroweight = EINA_FALSE;
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int id = 0, count, boxl = 0, boxr = 0, boxt = 0, boxb = 0;
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int length, want, pad, extra = 0, rounding = 0;
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double cur_pos = 0, weight[2] = { 0, 0 }, scale;
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double box_align[2];
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Eina_Bool box_fill[2] = { EINA_FALSE, EINA_FALSE };
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evas_object_geometry_get(ui_box, &boxx, &boxy, &boxw, &boxh);
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efl_gfx_size_hint_margin_get(ui_box, &boxl, &boxr, &boxt, &boxb);
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scale = evas_object_scale_get(ui_box);
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// Box align: used if "item has max size and fill" or "no item has a weight"
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// Note: cells always expand on the orthogonal direction
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box_align[0] = pd->align.h;
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box_align[1] = pd->align.v;
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if (box_align[0] < 0)
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{
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box_fill[0] = EINA_TRUE;
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box_align[0] = 0.5;
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}
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if (box_align[1] < 0)
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{
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box_fill[1] = EINA_TRUE;
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box_align[1] = 0.5;
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}
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count = eina_list_count(bd->children);
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if (!count)
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{
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evas_object_size_hint_min_set(ui_box, 0, 0);
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return;
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}
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items = alloca(count * sizeof(*items));
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#ifdef DEBUG
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memset(items, 0, count * sizeof(*items));
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#endif
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// scan all items, get their properties, calculate total weight & min size
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EINA_LIST_FOREACH(bd->children, li, opt)
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{
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item = &items[id];
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o = item->obj = opt->obj;
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efl_gfx_size_hint_weight_get(o, &item->weight[0], &item->weight[1]);
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efl_gfx_size_hint_align_get(o, &item->align[0], &item->align[1]);
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efl_gfx_size_hint_margin_get(o, &item->pad[0], &item->pad[1], &item->pad[2], &item->pad[3]);
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item->max = efl_gfx_size_hint_max_get(o);
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item->want = efl_gfx_size_hint_combined_min_get(o);
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efl_gfx_size_hint_aspect_get(o, &item->aspect_type, &item->aspect);
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if (item->aspect.w <= 0 || item->aspect.h <= 0)
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{
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if (item->aspect_type >= EFL_GFX_SIZE_HINT_ASPECT_HORIZONTAL)
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ERR("Invalid aspect parameter for obj: %p", item->obj);
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item->aspect.w = item->aspect.h = 0;
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item->aspect_type = EFL_GFX_SIZE_HINT_ASPECT_NONE;
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}
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if (item->aspect_type >= EFL_GFX_SIZE_HINT_ASPECT_HORIZONTAL)
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{
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double w, h;
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w = item->want.w;
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h = w * item->aspect.h / item->aspect.w;
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if (h < item->want.h)
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{
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h = item->want.h;
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w = h * item->aspect.w / item->aspect.h;
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}
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if (horiz)
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{
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if ((item->align[1] < 0) && (h < boxh))
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{
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double w1, h1;
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h1 = item->max.h > 0 ? MIN(boxh, item->max.h) : boxh;
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h1 = MAX(h, h1);
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w1 = h1 * item->aspect.w / item->aspect.h;
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w = item->max.w > 0 ? MIN(w1, item->max.w) : w1;
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}
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}
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else
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{
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if ((item->align[0] < 0) && (w < boxw))
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{
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double w1, h1;
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w1 = item->max.w > 0 ? MIN(boxw, item->max.w) : boxw;
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w1 = MAX(w, w1);
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h1 = w1 * item->aspect.h / item->aspect.w;
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h = item->max.h > 0 ? MIN(h1, item->max.h) : h1;
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}
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}
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item->want.w = w;
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item->want.h = h;
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}
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if (item->weight[0] < 0) item->weight[0] = 0;
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if (item->weight[1] < 0) item->weight[1] = 0;
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if (item->align[0] < 0) item->align[0] = -1;
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if (item->align[1] < 0) item->align[1] = -1;
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if (item->align[0] > 1) item->align[0] = 1;
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if (item->align[1] > 1) item->align[1] = 1;
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if (item->want.w < 0) item->want.w = 0;
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if (item->want.h < 0) item->want.h = 0;
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if (item->max.w < 0) item->max.w = INT_MAX;
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if (item->max.h < 0) item->max.h = INT_MAX;
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if (item->max.w < item->want.w) item->max.w = item->want.w;
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if (item->max.h < item->want.h) item->max.h = item->want.h;
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item->want.w += item->pad[0] + item->pad[1];
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item->want.h += item->pad[2] + item->pad[3];
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weight[0] += item->weight[0];
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weight[1] += item->weight[1];
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if (horiz)
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{
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wantw += item->want.w;
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if (item->want.h > wanth)
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wanth = item->want.h;
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}
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else
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{
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wanth += item->want.h;
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if (item->want.w > wantw)
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wantw = item->want.w;
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}
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item->id = id++;
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}
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// box outer margin
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boxw -= boxl + boxr;
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boxh -= boxt + boxb;
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boxx += boxl;
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boxy += boxt;
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// total space & available space
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if (horiz)
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{
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length = boxw;
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want = wantw;
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pad = pd->pad.scalable ? (pd->pad.h * scale) : pd->pad.h;
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}
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else
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{
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length = boxh;
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want = wanth;
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pad = pd->pad.scalable ? (pd->pad.v * scale) : pd->pad.v;
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}
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// padding can not be squeezed (note: could make it an option)
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length -= pad * (count - 1);
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// available space. if <0 we overflow
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extra = length - want;
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if (horiz)
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{
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evas_object_size_hint_min_set(ui_box,
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wantw + boxl + boxr + pad * (count - 1),
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wanth + boxt + boxb);
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}
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else
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{
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evas_object_size_hint_min_set(ui_box,
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wantw + boxl + boxr,
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wanth + pad * (count - 1) + boxt + boxb);
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}
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if (extra < 0) extra = 0;
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if (EINA_DBL_EQ(weight[!horiz], 0))
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{
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if (box_fill[!horiz])
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{
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// box is filled, set all weights to be equal
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zeroweight = EINA_TRUE;
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}
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else
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{
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// move bounding box according to box align
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cur_pos = extra * box_align[!horiz];
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}
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weight[!horiz] = count;
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}
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for (id = 0; id < count; id++)
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{
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double cx, cy, cw, ch, x, y, w, h;
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item = &items[id];
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// extra rounding up (compensate cumulative error)
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if ((item->id == (count - 1)) && (cur_pos - floor(cur_pos) >= 0.5))
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rounding = 1;
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if (horiz)
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{
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cx = boxx + cur_pos;
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cy = boxy;
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cw = item->want.w + rounding + (zeroweight ? 1.0 : item->weight[0]) * extra / weight[0];
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ch = boxh;
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cur_pos += cw + pad;
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}
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else
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{
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cx = boxx;
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cy = boxy + cur_pos;
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cw = boxw;
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ch = item->want.h + rounding + (zeroweight ? 1.0 : item->weight[1]) * extra / weight[1];
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cur_pos += ch + pad;
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}
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if (item->aspect_type >= EFL_GFX_SIZE_HINT_ASPECT_HORIZONTAL)
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{
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if (horiz)
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{
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w = item->want.w;
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h = item->want.h;
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if (weight[0] > 0)
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w = item->want.w + extra * item->weight[0] / weight[0];
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h = w * item->aspect.h / item->aspect.w;
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if (item->aspect_type == EFL_GFX_SIZE_HINT_ASPECT_BOTH ||
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item->aspect_type == EFL_GFX_SIZE_HINT_ASPECT_VERTICAL)
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{
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if (h > boxh)
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{
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h = boxh;
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w = h * item->aspect.w / item->aspect.h;
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}
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}
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}
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else
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{
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w = item->want.w;
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h = item->want.h;
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if (weight[1] > 0)
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h = item->want.h + extra * item->weight[1] / weight[1];
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w = h * item->aspect.w / item->aspect.h;
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if (item->aspect_type == EFL_GFX_SIZE_HINT_ASPECT_BOTH ||
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item->aspect_type == EFL_GFX_SIZE_HINT_ASPECT_HORIZONTAL)
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{
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if (w > boxw)
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{
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w = boxw;
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h = w * item->aspect.h / item->aspect.w;
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}
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}
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}
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if ((item->max.w != INT_MAX) && (item->max.h != INT_MAX))
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{
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double mar, ar;
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mar = item->max.w / (double)item->max.h;
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ar = item->aspect.w / (double)item->aspect.h;
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if (ar < mar)
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{
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if (h > item->max.h)
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{
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h = item->max.h;
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w = h * item->aspect.w / item->aspect.h;
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}
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}
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else
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{
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if (w > item->max.w)
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{
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w = item->max.w;
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h = w * item->aspect.h / item->aspect.w;
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}
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}
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}
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else if (item->max.w != INT_MAX)
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{
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w = MIN(w, MAX(item->want.w, item->max.w));
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h = w * item->aspect.h / item->aspect.w;
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}
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else
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{
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h = MIN(h, MAX(item->want.h, item->max.h));
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w = h * item->aspect.w / item->aspect.h;
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}
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w = w - item->pad[0] - item->pad[1];
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h = h - item->pad[2] - item->pad[3];
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if (item->align[0] < 0)
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x = cx + (cw - w) * 0.5 + item->pad[0];
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else
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x = cx + (cw - w) * item->align[0] + item->pad[0];
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if (item->align[1] < 0)
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y = cy + (ch - h) * 0.5 + item->pad[2];
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else
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y = cy + (ch - h) * item->align[1] + item->pad[2];
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}
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else
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{
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// horizontally
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if (item->max.w < INT_MAX)
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{
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w = MIN(MAX(item->want.w - item->pad[0] - item->pad[1], item->max.w), cw);
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if (item->align[0] < 0)
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{
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// bad case: fill+max are not good together
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x = cx + ((cw - w) * box_align[0]) + item->pad[0];
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}
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else
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x = cx + ((cw - w) * item->align[0]) + item->pad[0];
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}
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else if (item->align[0] < 0)
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{
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// fill x
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w = cw - item->pad[0] - item->pad[1];
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x = cx + item->pad[0];
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}
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else
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{
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if (horiz && item->weight[0] > 0)
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w = cw - item->pad[0] - item->pad[1];
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else
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w = item->want.w - item->pad[0] - item->pad[1];
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x = cx + ((cw - w) * item->align[0]) + item->pad[0];
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}
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// vertically
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if (item->max.h < INT_MAX)
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{
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h = MIN(MAX(item->want.h - item->pad[2] - item->pad[3], item->max.h), ch);
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if (item->align[1] < 0)
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{
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// bad case: fill+max are not good together
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y = cy + ((ch - h) * box_align[1]) + item->pad[2];
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}
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else
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y = cy + ((ch - h) * item->align[1]) + item->pad[2];
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}
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else if (item->align[1] < 0)
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{
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// fill y
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h = ch - item->pad[2] - item->pad[3];
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y = cy + item->pad[2];
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}
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else
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{
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if (!horiz && item->weight[1] > 0)
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h = ch - item->pad[2] - item->pad[3];
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else
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h = item->want.h - item->pad[2] - item->pad[3];
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y = cy + ((ch - h) * item->align[1]) + item->pad[2];
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}
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}
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//DBG("[%2d/%2d] cell: %.0f,%.0f %.0fx%.0f item: %.0f,%.0f %.0fx%.0f",
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// id, count, cx, cy, cw, ch, x, y, w, h);
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evas_object_geometry_set(item->obj, x, y, w, h);
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}
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}
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