135 lines
5.0 KiB
C++
135 lines
5.0 KiB
C++
/*
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* Mr. 4th Dimention - Allen Webster
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*
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* 31.03.2019
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*
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* Text layout representation
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*
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*/
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// TOP
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internal void
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text_layout_init(Thread_Context *tctx, Text_Layout_Container *container){
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block_zero_struct(container);
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container->node_arena = make_arena_system();
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container->table = make_table_u64_u64(tctx->allocator, 20);
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}
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internal Text_Layout*
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text_layout_new__alloc_layout(Text_Layout_Container *container){
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Text_Layout *node = container->free_nodes;
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if (node == 0){
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node = push_array(&container->node_arena, Text_Layout, 1);
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}
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else{
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sll_stack_pop(container->free_nodes);
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}
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return(node);
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}
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internal void
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text_layout_release(Thread_Context *tctx, Models *models, Text_Layout_Container *container, Text_Layout *layout){
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Arena arena = *layout->arena;
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linalloc_clear(&arena);
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sll_stack_push(container->free_nodes, layout);
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}
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internal Text_Layout_ID
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text_layout_new(Text_Layout_Container *container, Arena *arena,
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Buffer_ID buffer_id, Buffer_Point point,
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Range_i64 visible_range, Range_i64 visible_line_number_range,
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Rect_f32 rect, ARGB_Color *item_colors, Layout_Function *layout_func){
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Text_Layout *new_layout_data = text_layout_new__alloc_layout(container);
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new_layout_data->arena = arena;
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new_layout_data->buffer_id = buffer_id;
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new_layout_data->point = point;
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new_layout_data->visible_range = visible_range;
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new_layout_data->visible_line_number_range = visible_line_number_range;
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new_layout_data->rect = rect;
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new_layout_data->item_colors = item_colors;
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new_layout_data->layout_func = layout_func;
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Text_Layout_ID new_id = ++container->id_counter;
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table_insert(&container->table, new_id, (u64)PtrAsInt(new_layout_data));
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return(new_id);
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}
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internal Text_Layout*
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text_layout_get(Text_Layout_Container *container, Text_Layout_ID id){
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Text_Layout *result = 0;
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Table_Lookup lookup = table_lookup(&container->table, id);
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if (lookup.found_match){
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u64 ptr_val = 0;
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table_read(&container->table, lookup, &ptr_val);
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result = (Text_Layout*)IntAsPtr(ptr_val);
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}
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return(result);
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}
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internal b32
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text_layout_erase(Thread_Context *tctx, Models *models, Text_Layout_Container *container, Text_Layout_ID id){
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b32 result = false;
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Table_Lookup lookup = table_lookup(&container->table, id);
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if (lookup.found_match){
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u64 ptr_val = 0;
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table_read(&container->table, lookup, &ptr_val);
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Text_Layout *ptr = (Text_Layout*)IntAsPtr(ptr_val);
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text_layout_release(tctx, models, container, ptr);
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table_erase(&container->table, lookup);
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result = true;
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}
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return(result);
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}
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////////////////////////////////
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internal void
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text_layout_render(Thread_Context *tctx, Models *models, Text_Layout *layout,
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ARGB_Color special_color, ARGB_Color ghost_color){
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Editing_File *file = imp_get_file(models, layout->buffer_id);
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if (file != 0){
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Render_Target *target = models->target;
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Face *face = file_get_face(models, file);
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f32 width = rect_width(layout->rect);
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Vec2_f32 delta = V2f32(1.f, 0.f);
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Vec2_f32 shift_p = layout->rect.p0 - layout->point.pixel_shift;
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i64 first_index = layout->visible_range.first;
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i64 line_number = layout->visible_line_number_range.min;
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i64 line_number_last = layout->visible_line_number_range.max;
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Layout_Function *layout_func = layout->layout_func;
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for (;line_number <= line_number_last; line_number += 1){
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Layout_Item_List line = file_get_line_layout(tctx, models, file,
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layout_func, width, face,
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line_number);
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for (Layout_Item_Block *block = line.first;
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block != 0;
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block = block->next){
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Layout_Item *item = block->items;
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i64 count = block->item_count;
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ARGB_Color *item_colors = layout->item_colors;
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for (i32 i = 0; i < count; i += 1, item += 1){
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if (item->codepoint != 0){
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ARGB_Color color = 0;
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if (HasFlag(item->flags, LayoutItemFlag_Special_Character)){
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color = special_color;
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}
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else if (HasFlag(item->flags, LayoutItemFlag_Ghost_Character)){
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color = ghost_color;
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}
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else{
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color = item_colors[item->index - first_index];
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}
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Vec2_f32 p = item->rect.p0 + shift_p;
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draw_font_glyph(target, face, item->codepoint, p, color, GlyphFlag_None, delta);
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}
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}
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}
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shift_p.y += line.height;
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}
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}
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}
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// BOTTOM
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