4coder/4ed_text_layout.cpp

133 lines
5.0 KiB
C++

/*
* Mr. 4th Dimention - Allen Webster
*
* 31.03.2019
*
* Text layout representation
*
*/
// TOP
internal void
text_layout_init(Thread_Context *tctx, Text_Layout_Container *container){
block_zero_struct(container);
container->node_arena = make_arena_system();
container->table = make_table_u64_u64(tctx->allocator, 20);
}
internal Text_Layout*
text_layout_new__alloc_layout(Text_Layout_Container *container){
Text_Layout *node = container->free_nodes;
if (node == 0){
node = push_array(&container->node_arena, Text_Layout, 1);
}
else{
sll_stack_pop(container->free_nodes);
}
return(node);
}
internal void
text_layout_release(Thread_Context *tctx, Models *models, Text_Layout_Container *container, Text_Layout *layout){
Arena arena = *layout->arena;
linalloc_clear(&arena);
sll_stack_push(container->free_nodes, layout);
}
internal Text_Layout_ID
text_layout_new(Text_Layout_Container *container, Arena *arena,
Buffer_ID buffer_id, Buffer_Point point,
Range_i64 visible_range, Range_i64 visible_line_number_range,
Rect_f32 rect, ARGB_Color *item_colors, Layout_Function *layout_func){
Text_Layout *new_layout_data = text_layout_new__alloc_layout(container);
new_layout_data->arena = arena;
new_layout_data->buffer_id = buffer_id;
new_layout_data->point = point;
new_layout_data->visible_range = visible_range;
new_layout_data->visible_line_number_range = visible_line_number_range;
new_layout_data->rect = rect;
new_layout_data->item_colors = item_colors;
new_layout_data->layout_func = layout_func;
Text_Layout_ID new_id = ++container->id_counter;
table_insert(&container->table, new_id, (u64)PtrAsInt(new_layout_data));
return(new_id);
}
internal Text_Layout*
text_layout_get(Text_Layout_Container *container, Text_Layout_ID id){
Text_Layout *result = 0;
Table_Lookup lookup = table_lookup(&container->table, id);
if (lookup.found_match){
u64 ptr_val = 0;
table_read(&container->table, lookup, &ptr_val);
result = (Text_Layout*)IntAsPtr(ptr_val);
}
return(result);
}
internal b32
text_layout_erase(Thread_Context *tctx, Models *models, Text_Layout_Container *container, Text_Layout_ID id){
b32 result = false;
Table_Lookup lookup = table_lookup(&container->table, id);
if (lookup.found_match){
u64 ptr_val = 0;
table_read(&container->table, lookup, &ptr_val);
Text_Layout *ptr = (Text_Layout*)IntAsPtr(ptr_val);
text_layout_release(tctx, models, container, ptr);
table_erase(&container->table, lookup);
result = true;
}
return(result);
}
////////////////////////////////
internal void
text_layout_render(Thread_Context *tctx, Models *models, Text_Layout *layout,
ARGB_Color special_color, ARGB_Color ghost_color){
Editing_File *file = imp_get_file(models, layout->buffer_id);
if (file != 0){
Render_Target *target = models->target;
Face *face = file_get_face(models, file);
f32 width = rect_width(layout->rect);
Vec2_f32 shift_p = layout->rect.p0 - layout->point.pixel_shift;
i64 first_index = layout->visible_range.first;
i64 line_number = layout->visible_line_number_range.min;
i64 line_number_last = layout->visible_line_number_range.max;
Layout_Function *layout_func = layout->layout_func;
for (;line_number <= line_number_last; line_number += 1){
Layout_Item_List line = file_get_line_layout(tctx, models, file,
layout_func, width, face,
line_number);
for (Layout_Item_Block *block = line.first;
block != 0;
block = block->next){
Layout_Item *item = block->items;
i64 count = block->item_count;
ARGB_Color *item_colors = layout->item_colors;
for (i32 i = 0; i < count; i += 1, item += 1){
if (item->codepoint != 0){
ARGB_Color color = 0;
if (HasFlag(item->flags, LayoutItemFlag_Special_Character)){
color = special_color;
}
else if (HasFlag(item->flags, LayoutItemFlag_Ghost_Character)){
color = ghost_color;
}
else{
color = item_colors[item->index - first_index];
}
Vec2_f32 p = item->rect.p0 + shift_p;
draw_font_glyph(target, face, item->codepoint, p, color, GlyphFlag_None);
}
}
}
shift_p.y += line.height;
}
}
}
// BOTTOM