244 lines
8.9 KiB
C++
244 lines
8.9 KiB
C++
#include<hgl/graph/font/TextLayout.h>
|
|
#include<hgl/type/Extent.h>
|
|
#include<hgl/type/UnicodeBlocks.h>
|
|
|
|
namespace hgl
|
|
{
|
|
namespace graph
|
|
{
|
|
namespace
|
|
{
|
|
constexpr u16char BeginSymbols []=U16_TEXT("!),❟.:;?]}¨·ˇˉ―‖’❜”„❞…∶、。〃々❯〉》」』】〕〗！＂＇），．：；？］｀｜｝～»›"); //行首禁用符号
|
|
constexpr u16char EndSymbols []=U16_TEXT("([{·❛‘“‟❝❮〈《「『【〔〖（．［｛«‹"); //行尾禁用符号
|
|
constexpr u16char CurrencySymbols []=U16_TEXT("₳฿₿￠₡¢₢₵₫€￡£₤₣ƒ₲₭Ł₥₦₽₱＄$₮ℳ₶₩￦¥￥₴₸¤₰៛₪₯₠₧﷼㍐원৳₹₨৲௹"); //货币符号
|
|
constexpr u16char VRotateSymbols []=U16_TEXT("()[]{}〈〉《》「」『』【】〔〕〖〗（）［］｛｝―‖…∶｜～"); //竖排必须旋转的符号
|
|
|
|
constexpr int BeginSymbolsCount =sizeof(BeginSymbols) /sizeof(u16char);
|
|
constexpr int EndSymbolsCount =sizeof(EndSymbols) /sizeof(u16char);
|
|
constexpr int CurrencySymbolsCount=sizeof(CurrencySymbols)/sizeof(u16char);
|
|
constexpr int VRotateSymbolsCount =sizeof(VRotateSymbols) /sizeof(u16char);
|
|
|
|
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
|
|
|
|
template<typename T>
|
|
struct CharLayoutAttributes
|
|
{
|
|
T 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
|
|
};//struct CharLayoutAttributes
|
|
|
|
/**
|
|
* 4舍5入处理
|
|
*/
|
|
inline TEXT_COORD_TYPE out4in5(const double value)
|
|
{
|
|
return TEXT_COORD_TYPE(floor(value+0.5));
|
|
}
|
|
|
|
template<typename T> class TextLayoutEngine
|
|
{
|
|
protected:
|
|
|
|
RenderableCreater *rc;
|
|
const TextLayoutAttributes *tla;
|
|
|
|
TextDirection direction;
|
|
|
|
bool endless;
|
|
float splite_line_max_limit;
|
|
|
|
int max_chars;
|
|
|
|
BaseString<T> origin_string;
|
|
|
|
using CLA=CharLayoutAttributes<T>;
|
|
|
|
List<CLA> chars_attributes;
|
|
|
|
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;
|
|
|
|
public:
|
|
|
|
virtual ~TextLayoutEngine()=default;
|
|
|
|
bool Init(RenderableCreater *_rc,const TextLayoutAttributes *_tla)
|
|
{
|
|
if(!_rc
|
|
||!_tla
|
|
||!tla->font_source
|
|
||!tla->char_attributes)
|
|
return false;
|
|
|
|
rc=_rc;
|
|
tla=_tla;
|
|
|
|
direction.text_direction=tla->text_direction;
|
|
|
|
if(direction.vertical)
|
|
{
|
|
endless =(tla->max_width<=0.0f);
|
|
splite_line_max_limit =tla->max_width;
|
|
}
|
|
else
|
|
{
|
|
endless =(tla->max_height<=0.0f);
|
|
splite_line_max_limit =tla->max_height;
|
|
}
|
|
|
|
const float origin_char_height=tla->font_source->GetCharHeight();
|
|
|
|
x=y=0;
|
|
char_height =out4in5(origin_char_height);
|
|
space_size =out4in5(origin_char_height*tla->space_size);
|
|
full_space_size =out4in5(origin_char_height*tla->full_space_size);
|
|
tab_size =out4in5(origin_char_height*tla->tab_size);
|
|
char_gap =out4in5(origin_char_height*tla->char_gap);
|
|
line_gap =out4in5(origin_char_height*tla->line_gap);
|
|
line_height =out4in5(origin_char_height+line_gap);
|
|
paragraph_gap =out4in5(origin_char_height*tla->paragraph_gap);
|
|
|
|
return(true);
|
|
}
|
|
|
|
protected:
|
|
|
|
/**
|
|
* 预处理所有的字符，获取所有字符的宽高，以及是否标点符号等信息
|
|
*/
|
|
int preprocess()
|
|
{
|
|
const int count=hgl_min(max_chars,origin_string.Length());
|
|
|
|
if(count<=0)
|
|
return 0;
|
|
|
|
chars_attributes.SetCount(count);
|
|
|
|
CLA *cla=chars_attributes.GetData();
|
|
const T *cp=origin_string.c_str();
|
|
|
|
for(int i=0;i<count;i++)
|
|
{
|
|
cla->ch=*cp;
|
|
|
|
if(hgl::isspace(*cp))
|
|
{
|
|
cla->visible=false;
|
|
|
|
if(*cp=='\t') cla->size=tab_size; else
|
|
if(*cp==HGL_FULL_SPACE) cla->size=full_space_size; else
|
|
cla->size=space_size;
|
|
}
|
|
else
|
|
{
|
|
cla->visible=true; cla->size=out4in5(tla->font_source->GetCharAdvWidth(*cp));
|
|
|
|
cla->begin_disable =hgl::strchr(BeginSymbols, *cp,BeginSymbolsCount );
|
|
cla->end_disable =hgl::strchr(EndSymbols, *cp,EndSymbolsCount );
|
|
|
|
if(!cla->end_disable) //货币符号同样行尾禁用
|
|
cla->end_disable =hgl::strchr(CurrencySymbols,*cp,CurrencySymbolsCount );
|
|
|
|
cla->vrotate =hgl::strchr(VRotateSymbols,*cp,VRotateSymbolsCount );
|
|
|
|
cla->is_cjk =isCJK(*cp);
|
|
cla->is_emoji =isEmoji(*cp);
|
|
|
|
cla->is_punctuation =isPunctuation(*cp);
|
|
}
|
|
|
|
++cp;
|
|
++cla;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* 将字符串断成多行，处理标点禁用，以及英文单词禁拆分
|
|
*/
|
|
bool h_splite_to_lines(float view_limit)
|
|
{
|
|
const int count=chars_attributes.GetCount();
|
|
const CLA *cla=chars_attributes.GetData();
|
|
|
|
int cur_size=0;
|
|
|
|
for(int i=0;i<count;i++)
|
|
{
|
|
}
|
|
|
|
return(true);
|
|
}
|
|
|
|
bool v_splite_to_lines(float view_limit)
|
|
{
|
|
|
|
return(true);
|
|
}
|
|
|
|
public:
|
|
|
|
int layout(const int mc,const BaseString<T> &str)
|
|
{
|
|
if(mc<=0
|
|
||!str
|
|
||!(*str))
|
|
return(-1);
|
|
|
|
max_chars=mc;
|
|
origin_string=str;
|
|
|
|
if(preprocess()<=0)
|
|
return(-3);
|
|
|
|
if(direction.vertical)
|
|
{
|
|
if(!v_splite_to_lines(tla->max_height))
|
|
return(-4);
|
|
}
|
|
else
|
|
{
|
|
if(!h_splite_to_lines(tla->max_width))
|
|
return(-4);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
};//template<typename T> class TextLayoutEngine
|
|
}//namespace
|
|
|
|
int TextLayout(RenderableCreater *rc,const TextLayoutAttributes *tla,const int max_chars,const UTF16String &str)
|
|
{
|
|
TextLayoutEngine<u16char> engine;
|
|
|
|
if(!engine.Init(rc,tla))
|
|
return(-1);
|
|
|
|
return engine.layout(max_chars,str);
|
|
}
|
|
}//namespace graph
|
|
}//namespace hgl
|