4coder/4ed_layout.cpp

318 lines
7.7 KiB
C++

/*
* Mr. 4th Dimention - Allen Webster
*
* 19.08.2015
*
* Panel layout and general view functions for 4coder
*
*/
// TOP
struct Panel_Divider{
Panel_Divider *next;
i32 parent;
i32 which_child;
i32 child1, child2;
b32 v_divider;
i32 pos;
};
struct Screen_Region{
i32_Rect full;
i32_Rect inner;
i32 l_margin, r_margin;
i32 t_margin, b_margin;
};
struct Panel{
Panel *next;
Panel *prev;
struct View *view;
i32 parent;
i32 which_child;
int ALLOCED;
union{
struct{
i32_Rect full;
i32_Rect inner;
i32_Rect prev_inner;
i32 l_margin, r_margin;
i32 t_margin, b_margin;
};
Screen_Region screen_region;
};
};
struct Editing_Layout{
Panel *panels;
Panel free_sentinel;
Panel used_sentinel;
Panel_Divider *dividers;
Panel_Divider *free_divider;
i32 panel_count, panel_max_count;
i32 root;
i32 active_panel;
i32 full_width, full_height;
};
struct Divider_And_ID{
Panel_Divider* divider;
i32 id;
};
struct Panel_And_ID{
Panel* panel;
i32 id;
};
internal void
panel_init(Panel *panel){
panel->view = 0;
panel->parent = -1;
panel->which_child = 0;
panel->screen_region.full = i32_rect_zero();
panel->screen_region.inner = i32_rect_zero();
panel->l_margin = 3;
panel->r_margin = 3;
panel->t_margin = 3;
panel->b_margin = 3;
}
inline Panel_Divider
panel_divider_zero(){
Panel_Divider divider={0};
return(divider);
}
internal Divider_And_ID
layout_alloc_divider(Editing_Layout *layout){
Divider_And_ID result;
Assert(layout->free_divider);
result.divider = layout->free_divider;
layout->free_divider = result.divider->next;
*result.divider = panel_divider_zero();
result.divider->parent = -1;
result.divider->child1 = -1;
result.divider->child2 = -1;
result.id = (i32)(result.divider - layout->dividers);
if (layout->panel_count == 1){
layout->root = result.id;
}
return(result);
}
internal Divider_And_ID
layout_get_divider(Editing_Layout *layout, i32 id){
Divider_And_ID result;
Assert(id >= 0 && id < layout->panel_max_count-1);
result.id = id;
result.divider = layout->dividers + id;
return(result);
}
internal void
layout_free_divider(Editing_Layout *layout, Panel_Divider *divider){
divider->next = layout->free_divider;
layout->free_divider = divider;
}
internal Panel_And_ID
layout_alloc_panel(Editing_Layout *layout){
Panel_And_ID result = {};
Assert(layout->panel_count < layout->panel_max_count);
++layout->panel_count;
result.panel = layout->free_sentinel.next;
dll_remove(result.panel);
dll_insert(&layout->used_sentinel, result.panel);
panel_init(result.panel);
result.id = (i32)(result.panel - layout->panels);
result.panel->ALLOCED = 1;
return(result);
}
internal void
layout_free_panel(Editing_Layout *layout, Panel *panel){
dll_remove(panel);
dll_insert(&layout->free_sentinel, panel);
--layout->panel_count;
panel->ALLOCED = 0;
}
internal Divider_And_ID
layout_calc_divider_id(Editing_Layout *layout, Panel_Divider *divider){
Divider_And_ID result;
result.divider = divider;
result.id = (i32)(divider - layout->dividers);
return result;
}
struct Split_Result{
Panel_Divider *divider;
Panel *panel;
};
internal Split_Result
layout_split_panel(Editing_Layout *layout, Panel *panel, b32 vertical){
Split_Result result = {};
Divider_And_ID div = {}, parent_div = {};
Panel_And_ID new_panel = {};
div = layout_alloc_divider(layout);
if (panel->parent != -1){
parent_div = layout_get_divider(layout, panel->parent);
if (panel->which_child == -1){
parent_div.divider->child1 = div.id;
}
else{
parent_div.divider->child2 = div.id;
}
}
div.divider->parent = panel->parent;
div.divider->which_child = panel->which_child;
if (vertical){
div.divider->v_divider = 1;
div.divider->pos = (panel->full.x0 + panel->full.x1) / 2;
}
else{
div.divider->v_divider = 0;
div.divider->pos = (panel->full.y0 + panel->full.y1) / 2;
}
new_panel = layout_alloc_panel(layout);
panel->parent = div.id;
panel->which_child = -1;
new_panel.panel->parent = div.id;
new_panel.panel->which_child = 1;
result.divider = div.divider;
result.panel = new_panel.panel;
return result;
}
internal void
panel_fix_internal_area(Panel *panel){
panel->inner.x0 = panel->full.x0 + panel->l_margin;
panel->inner.x1 = panel->full.x1 - panel->r_margin;
panel->inner.y0 = panel->full.y0 + panel->t_margin;
panel->inner.y1 = panel->full.y1 - panel->b_margin;
}
internal void
layout_fix_all_panels(Editing_Layout *layout){
Panel *panel;
Panel_Divider *dividers = layout->dividers;
i32 panel_count = layout->panel_count;
i32_Rect r;
i32 pos, which_child, action;
Divider_And_ID div;
if (panel_count > 1){
for (panel = layout->used_sentinel.next;
panel != &layout->used_sentinel;
panel = panel->next){
r.x0 = 0;
r.x1 = r.x0 + layout->full_width;
r.y0 = 0;
r.y1 = r.y0 + layout->full_height;
which_child = panel->which_child;
div.id = panel->parent;
for (;;){
Assert(div.id != -1);
div.divider = dividers + div.id;
pos = div.divider->pos;
action = (div.divider->v_divider << 1) | (which_child > 0);
switch (action){
case 0: // v_divider : 0, which_child : -1
if (pos < r.y1) r.y1 = pos;
break;
case 1: // v_divider : 0, which_child : 1
if (pos > r.y0) r.y0 = pos;
break;
case 2: // v_divider : 1, which_child : -1
if (pos < r.x1) r.x1 = pos;
break;
case 3: // v_divider : 1, which_child : 1
if (pos > r.x0) r.x0 = pos;
break;
}
if (div.id != layout->root){
div.id = div.divider->parent;
which_child = div.divider->which_child;
}
else{
break;
}
}
panel->full = r;
panel_fix_internal_area(panel);
}
}
else{
panel = layout->used_sentinel.next;
panel->full.x0 = 0;
panel->full.y0 = 0;
panel->full.x1 = layout->full_width;
panel->full.y1 = layout->full_height;
panel_fix_internal_area(panel);
}
}
internal void
layout_refit(Editing_Layout *layout, i32 prev_width, i32 prev_height){
Panel_Divider *dividers = layout->dividers;
i32 max = layout->panel_max_count - 1;
f32 h_ratio, v_ratio;
Panel_Divider *divider = dividers;
i32 i;
if (layout->panel_count > 1){
Assert(prev_width != 0 && prev_height != 0);
h_ratio = ((f32)layout->full_width) / prev_width;
v_ratio = ((f32)layout->full_height) / prev_height;
for (i = 0; i < max; ++i, ++divider){
if (divider->v_divider){
divider->pos = ROUND32((divider->pos) * h_ratio);
}
else{
divider->pos = ROUND32((divider->pos) * v_ratio);
}
}
}
layout_fix_all_panels(layout);
}
// BOTTOM