ULRE/inc/hgl/graph/font/TextLayout.h

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#ifndef HGL_GRAPH_TEXT_LAYOUT_INCLUDE
#define HGL_GRAPH_TEXT_LAYOUT_INCLUDE
#include<hgl/type/StringList.h>
#include<hgl/graph/font/FontSource.h>
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#include<hgl/graph/RenderableCreater.h>
namespace hgl
{
namespace graph
{
class TileFont;
/**
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*
*/
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struct CharAttributes
{
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bool bold =false; ///<加粗
bool italic =false; ///<右斜
bool underline =false; ///<下划线
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Color4f CharColor; ///<字符颜色
Color4f BackgroundColor; ///<背影颜色
};//struct CharAttributes
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/**
*
*/
union TextDirection
{
uint8 text_direction;
struct
{
uint vertical:1; ///<是否竖排
uint right_to_left:1; ///<是否从右往左
};
};//union TextDirection
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/**
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*
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*/
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enum class TextAlign
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{
Left=0, ///<左对齐
Right, ///<右对齐
Center, ///<居中
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Fill, ///<排满整行/列
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Top =Left, ///<上对齐
Bottom =Right ///<下对齐
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};//enum class TextAlign
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/**
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*
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*/
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struct TextLayoutAttributes
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{
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FontSource * font_source =nullptr; ///<字符源
CharAttributes *char_attributes =nullptr; ///<缺省字符属性
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uint8 text_direction =0; ///<文本排列方向
TextAlign align =TextAlign::Left; ///<段落对齐
float char_gap =0.0f; ///<字间距
float line_gap =0.1f; ///<行间距(相对于字符高度)
float paragraph_gap =1.0f; ///<段间距(相对于字符高度)
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float max_width =0.0f; ///<最大宽度(<=0代表无限制)
float max_height =0.0f; ///<最大高度(<=0代表无限制)
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bool border_symbols_disable =true; ///<边界符号禁用(如行首禁用逗号)
// bool auto_symbols_convert =true; ///<自动符号转换(如tm/(r)/(c)等)
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float space_size =0.5f; ///<半角空格尺寸(对应字符高度的系数)
float full_space_size =1.0f; ///<全角空格尺寸(对应字符高度的系数)
float tab_size =4.0f; ///<Tab符号尺寸(对应字符高度的系数)
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bool compress_punctuation =false; ///<压缩标点符号
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};//struct TextLayoutAttributes
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using TEXT_COORD_TYPE=int; //字符必须坐标对齐显示才能不模糊,所以这里坐标系全部使用整型坐标
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class TextLayout
{
protected:
struct CharLayoutAttributes
{
u32char ch; ///<字符
int size; ///<字符排版尺寸(一般为宽)
bool visible; ///<是否可显示字符
bool is_cjk; ///<是否是中日韩文字
bool is_emoji; ///<是否是表情符号
bool is_punctuation; ///<是否是标点符号
bool begin_disable; ///<是否行首禁用符号
bool end_disable; ///<是否行尾禁用符号
bool vrotate; ///<竖排时是否需要旋转
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CharMetricsInfo adv_info; ///<字符绘制信息
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};//struct CharLayoutAttributes
using CLA=CharLayoutAttributes;
protected:
RenderableCreater *rc;
TextLayoutAttributes tla;
protected:
TextDirection direction;
bool endless;
float splite_line_max_limit;
int max_chars; ///<总字符数量
int draw_chars_count; ///<可绘制字符数量
List<CLA> chars_attributes;
protected:
template<typename T> int preprocess(const BaseString<T> &origin_string);
template<typename T> int plane_preprocess(const BaseString<T> &origin_string);
bool h_splite_to_lines(float view_limit);
bool v_splite_to_lines(float view_limit);
int pl_h_l2r();
int pl_h_r2l();
int pl_v_r2l();
int pl_v_l2r();
protected:
TEXT_COORD_TYPE x,y;
TEXT_COORD_TYPE char_height;
TEXT_COORD_TYPE space_size;
TEXT_COORD_TYPE full_space_size;
TEXT_COORD_TYPE tab_size;
TEXT_COORD_TYPE char_gap;
TEXT_COORD_TYPE line_gap;
TEXT_COORD_TYPE line_height;
TEXT_COORD_TYPE paragraph_gap;
protected:
AutoDelete<VB4f> vertex,
tex_coord;
public:
TextLayout()
{
rc=nullptr;
direction.text_direction=0;
max_chars =0;
draw_chars_count =0;
vertex =nullptr;
tex_coord =nullptr;
}
virtual ~TextLayout()=default;
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bool Set (RenderableCreater *_rc) {if(_rc)rc=_rc;}
bool Set (const TextLayoutAttributes *_tla) {if(_tla)memcpy(&tla,_tla,sizeof(TextLayoutAttributes));}
bool Set (FontSource *fs) {if(fs)tla.font_source=fs;}
bool SetTextDirection (const uint8 &td) {tla.text_direction=td;}
bool Set (const TextAlign &ta) {tla.align=ta;}
bool SetMaxWidth (const float mw) {tla.max_width=mw;}
bool SetMaxHeight (const float mh) {tla.max_height=mh;}
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virtual bool Init (); ///<初始化排版
// virtual int Layout (const int max_chars,const BaseString<T> &)=0; ///<排版
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template<typename T>
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int PlaneLayout (TileFont *,const int max_chars,const BaseString<T> &); ///<简易排版
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};//class TextLayout
}//namespace graph
}//namespace hgl
#endif//HGL_GRAPH_TEXT_LAYOUT_INCLUDE