#pragma once

#include <core/SkPaint.h>
#include <core/SkCanvas.h>
#include <core/sktdarray.h>

class SkTextLayoutEx {
public:
    //not support for DT_PREFIXONLY
    void init(const wchar_t text[], size_t length,SkRect rc,  SkPaint &paint,UINT uFormat);

    SkRect draw(SkCanvas* canvas);

private:
    SkScalar drawLineEndWithEllipsis(SkCanvas *canvas, SkScalar x, SkScalar y, int iBegin,int iEnd,SkScalar maxWidth);

    SkScalar drawLine(SkCanvas *canvas, SkScalar x, SkScalar y, int iBegin,int iEnd);

    void buildLines();

	void drawText(SkCanvas *canvas,const wchar_t* text, size_t length, SkScalar x, SkScalar y,  SkPaint& paint);
	SkScalar measureText( SkPaint *paint,const wchar_t* text, size_t length);

private:
    SkTDArray<wchar_t> m_text;   //文本内容
    SkTDArray<int>  m_prefix;    //前缀符索引
	struct LineInfo {
		int nOffset;
		int nLen;
	};
    SkTDArray<LineInfo> m_lines;      //分行索引
    UINT            m_uFormat;    //显示标志
    SkRect          m_rcBound;    //限制矩形
    SkPaint  *m_paint;
};


SkRect DrawText_Skia(SkCanvas* canvas,const wchar_t *text,int len,SkRect box, SkPaint& paint,UINT uFormat);