4coder/4ed_buffer.h

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/*
* Mr. 4th Dimention - Allen Webster
*
* 24.01.2018
*
* Buffer types
*
*/
// TOP
#if !defined(FRED_BUFFER_H)
#define FRED_BUFFER_H
struct Cursor_With_Index{
i64 pos;
i32 index;
};
struct Gap_Buffer{
Base_Allocator *allocator;
u8 *data;
i64 size1;
i64 gap_size;
i64 size2;
i64 max;
// NOTE(allen): If there are N lines I store N + 1 slots in this array with
// line_starts[N] = size of the buffer.
// The variable line_start_count stores N + 1; call buffer_line_count(buffer)
// to get "N" the actual number of lines.
i64 *line_starts;
i64 line_start_count;
i64 line_start_max;
};
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struct Buffer_Chunk_Position{
i64 real_pos;
i64 chunk_pos;
i64 chunk_index;
};
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typedef i32 Line_Move_Kind;
enum{
LineMove_ShiftOldValues,
LineMove_MeasureString,
};
struct Line_Move{
Line_Move *next;
Line_Move_Kind kind;
i64 new_line_first;
union{
struct{
i64 old_line_first;
i64 old_line_opl;
i64 text_shift;
};
struct{
String_Const_u8 string;
i64 text_base;
};
};
};
typedef u32 Buffer_Layout_Flag;
enum{
BRFlag_Special_Character = (1 << 0),
BRFlag_Ghost_Character = (1 << 1)
};
struct Buffer_Layout_Item{
i64 index;
u32 codepoint;
Buffer_Layout_Flag flags;
Rect_f32 rect;
};
struct Buffer_Layout_Item_Block{
Buffer_Layout_Item_Block *next;
Buffer_Layout_Item *items;
i64 count;
i64 character_count;
};
struct Buffer_Layout_Item_List{
Buffer_Layout_Item_Block *first;
Buffer_Layout_Item_Block *last;
i32 node_count;
i32 total_count;
f32 height;
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f32 bottom_extension;
i64 character_count;
Interval_i64 index_range;
};
#if 0
struct Edit_Array{
Edit *vals;
i32 count;
};
#endif
#endif
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// BOTTOM