type TSPdfParagraphRange = class(TSPdfAbstractRange)
public
    function Create(docx_to_pdf: TSDocxToPdf; page: PdfPage; components: Components; sect_ware: TSSectWare; paragraph: P);
    function Calc();
    function Do();override;
    function SetExtraStyleId(style_id: string);

private
    function SetPPr(var ppr: PPr);
    function SetPPrByStyleId(var ppr: PPr; style_id: string);
    function SetRPr(var rpr; ppr: PPr);
    function SetRPrByStyleId(var rpr: RPr; style_id: string);
    function SetLvlText();
    function GetImageFileType(data: binary): string;
    function GetParagraphLineSpace(size: real; line: integer): real;
    function RangesToLines(ppr: PPr): tableArray;
    function CheckAndAddPage(y: real; offset: real): boolean;
    function GetUtf8CharLength(byte: string): integer;
    function RToTextRange(r: R; ppr: PPr);
    function SplitTextToTextRange(text: string; rpr: RPr);
    function RToDrawingRange(r: R; ppr: PPr);
    function SetLinesAlignment(ppr: PPr);
    function ResetCoordinates(ppr);

private
    docx_to_pdf_: TSDocxToPdf;
    docx_components_: Components;
    sect_ware_: TSSectWare;
    paragraph_: P;
    extra_style_id_: string;
    range_array_: array of TSPdfAbstractRange;
    page_: PdfPage;
    point_: TSPoint;
    lines_range_array_: tableArray;
end;

function TSPdfParagraphRange.Create(docx_to_pdf: TSDocxToPdf; page: PdfPage; components: Components; sect_ware: TSSectWare; paragraph: P);
begin
    docx_to_pdf_ := docx_to_pdf;
    page_ := page;
    docx_components_ := Components;
    sect_ware_ := sect_ware;
    paragraph_ := paragraph;
    extra_style_id_ := "";
    range_array_ := array();
    point_ := new TSPoint(); // 动态记录段落的坐标位置
    lines_range_array_ := array();
end;

function TSPdfParagraphRange.Calc(): tableArray;
begin
    self.SetPPr(paragraph_.PPr);
    self.SetLvlText();
    ppr := new PPrUnitDecorator(paragraph_.PPr);
    self.ResetCoordinates(ppr);
    point_.X := self.X;
    point_.Y := self.Y;
    self.CheckAndAddPage(point_.Y, ppr.Spacing.Before);
    point_.Y -= ppr.Spacing.Before;
    rs := paragraph_.Rs();
    if length(rs) = 0 then
    begin
        line_space := self.GetParagraphLineSpace(ppr.RPr.Sz.Val, ppr.Spacing.Line);
        if not self.H then self.H := ppr.Spacing.After + line_space;
        point_.Y -= self.H;
    end
    else begin
        for _, r in rs do
        begin
            self.SetRPr(r.RPr, paragraph_.PPr);
            if r.Br.Type = "page" then
                self.CheckAndAddPage(sect_ware_.SectPr.PgMar.Bottom, 1);
            else if ifObj(r.Drawing.XmlNode) then self.RToDrawingRange(r, ppr);
            else self.RToTextRange(r, ppr);
        end
    end
    self.RangesToLines(ppr);
end;

function TSPdfParagraphRange.Do();
begin
    for _,line_range in lines_range_array_ do
        for _,range in line_range do
            range.Do();
end;

function TSPdfParagraphRange.SetExtraStyleId(style_id: string);
begin
    extra_style_id_ := style_id;
end;

function TSPdfParagraphRange.RangesToLines(ppr: PPr);
begin
    lines_range_array_ := array();
    i := 0;
    max_size := 0;
    max_y := 0;
    line_range := array();
    total_height := 0;
    while i <= length(range_array_)-1 do
    begin
        range := range_array_[i];
        if i = 0 then point_.X += ppr.Ind.FirstLine;
        if range is class(TSPdfTextRange) and range.RPr.Sz.Val > max_size then
            max_size := range.RPr.Sz.Val;
        if range.H > max_y then max_y := range.H;
        line_space := self.GetParagraphLineSpace(max_size, ppr.Spacing.Line);
        diff := point_.Y - sect_ware_.SectPr.PgMar.Bottom;
        if self.CheckAndAddPage(point_.Y, max(line_space, range.H)) then
            total_height += diff;
        if_newline := point_.X + range.W - self.X > self.W + 1e-6;
        if if_newline and range.W < self.W then
        begin
            offset := line_space > max_y ? (line_space - max_size) / 2 + max_size - max_size / 5 : max_y;
            for _,item in line_range do
            begin
                item.Page := page_;
                item.Y := point_.Y - offset;
            end
            lines_range_array_[length(lines_range_array_)] := line_range;
            line_range := array();
            max_value := max(line_space, max_y);
            max_size := 0;
            max_y := 0;
            total_height += max_value;
            point_.Y -= max_value;
            point_.X := self.X;
            // w:hanging
            sz := range.RPr.SzCs.Val ? range.RPr.SzCs.Val : range.RPr.Sz.Val ? range.RPr.Sz.Val : docx_to_pdf_.Font.GetDefaultSz();
            point_.X -= ppr.Ind.HangingChars ? ppr.Ind.HangingChars * sz : ppr.Ind.Hanging;
            continue;
        end
        range.X := point_.X - range.X;
        point_.X += range.W;
        line_range[length(line_range)] := range;
        i++;
        if i = length(range_array_) then
        begin
            offset := line_space > max_y ? (line_space - max_size) / 2 + max_size - max_size / 5 : max_y;
            for _,item in line_range do
            begin
                item.Page := page_;
                item.Y := point_.Y - offset;
            end
            lines_range_array_[length(lines_range_array_)] := line_range;
            max_value := max(line_space, max_y) + ppr.Spacing.After;
            total_height += max_value;
            point_.Y -= max_value;
        end
    end
    self.SetLinesAlignment(ppr);
    if not self.H then self.H := total_height;
    self.Y := point_.Y;
end;

function TSPdfParagraphRange.SetLinesAlignment(ppr: PPr);
begin
    if length(lines_range_array_) = 0 then return;
    idx := length(lines_range_array_)-1;
    line := lines_range_array_[idx];
    offset := 0;
    case ppr.Jc.Val of
        "center":
        begin
            first := line[0];
            last := line[length(line)-1];
            offset := (self.W - last.X + first.X - last.W) / 2;
        end
        "right":
        begin
            first := line[0];
            last := line[length(line)-1];
            offset := self.W - last.X + first.X - last.W;
        end
    end;
    if offset < 0 then return;
    if offset then
        for i:=0 to length(line)-1 do
            line[i].X += offset;
end;

function TSPdfParagraphRange.CheckAndAddPage(y: real; offset: real): boolean;
begin
    if y - offset < sect_ware_.SectPr.PgMar.Bottom then
    begin
        page_ := docx_to_pdf_.GetNextPage(page_);
        if ifnil(page_) then page_ := docx_to_pdf_.AddPage(sect_ware_);
        point := docx_to_pdf_.GetCurrentPoint();
        point_.Y := point.Y;
        return true;
    end
    return false;
end;

function TSPdfParagraphRange.GetUtf8CharLength(byte: string): integer;
begin
    if (_and(ord(byte), 0b10000000)) = 0 then
        return 1;
    else if (_and(ord(byte), 0b11100000)) = 0b11000000 then
        return 2;
    else if (_and(ord(byte), 0b11110000)) = 0b11100000 then
        return 3;
    else if (_and(ord(byte), 0b11111000)) = 0b11110000 then
        return 4;
end;

function TSPdfParagraphRange.RToTextRange(r: R; ppr: PPr);
begin
    rpr := new RPrUnitDecorator(r.RPr);
    text := r.T.Text;
    if ifString(text) then self.SplitTextToTextRange(text, rpr);
end;

function TSPdfParagraphRange.SplitTextToTextRange(text: string; rpr: RPr);
begin
    pos := 1;
    while pos <= length(text) do
    begin
        num := self.GetUtf8CharLength(text[pos]);
        word := text[pos : pos+num-1];
        word := utf8ToAnsi(word);
        pos += num;
        font_name := rpr.RFonts.EastAsia ? rpr.RFonts.EastAsia : rpr.RFonts.Ascii;
        font_obj := docx_to_pdf_.Font.GetFont(font_name, rpr.B, rpr.I);
        if not rpr.Sz.Val then rpr.Sz.Val := rpr.SzCs.Val ? rpr.SzCs.Val : docx_to_pdf_.Font.GetDefaultSz();
        page_.SetFontAndSize(font_obj, rpr.Sz.Val);
        word_width := page_.TextWidth(word);
        text_range := new TSPdfTextRange();
        text_range.RPr := rpr;
        text_range.Text := word;
        text_range.Font := font_obj;
        text_range.W := word_width;
        text_range.H := 0;
        text_range.X := 0;
        text_range.Y := 0;
        range_array_[length(range_array_)] := text_range;
    end
end;

function TSPdfParagraphRange.RToDrawingRange(r: R; ppr: PPr);
begin
    xfrm := new XfrmUnitDecorator(r.Drawing._Inline.Graphic.GraphicData.Pic.SpPr.Xfrm);
    rels_adapter := class(TSPdfSingletonKit).GetComponent(docx_components_, "document_rels_adapter");
    id := r.Drawing._Inline.Graphic.GraphicData.Pic.BlipFill.Blip.Embed;
    rel := rels_adapter.Id(id);
    image_path := "word/" + rel.Target;
    image := docx_components_.Zip().Get(image_path);
    data := image.Data();
    image_path := docx_to_pdf_.GetTempPath(image_path);
    writeFile(rwBinary(), "", image_path, 0, length(data)-1, data);
    image := nil;
    case self.GetImageFileType(data) of
        "png":
            image := docx_to_pdf_.GetPdf().LoadPngImageFromFile("", image_path);
        "jpg":
            image := docx_to_pdf_.GetPdf().LoadJpegImageFromFile("", image_path);
    end;
    image_range := new TSPdfImageRange();
    image_range.Image := image;
    image_range.X := xfrm.Off.X;
    image_range.Y := xfrm.Off.Y;
    image_range.W := xfrm.Ext.CX;
    image_range.H := xfrm.Ext.CY;
    fileDelete("", image_path);
    range_array_[length(range_array_)] := image_range;
end;

function TSPdfParagraphRange.GetImageFileType(data: binary): string;
begin
    stream := new TMemoryStream();
    size := length(data);
    stream.Write(data[0:size-1], size);
    def := array(
        ('name': 'png', 'position': 0, 'value': array(0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A)),
        ('name': 'jpg', 'position': 0, 'value': array(0xFF, 0xD8)),
    );
    for i:=0 to length(def)-1 do
    begin
        value := def[i]['value'];
        stream.Seek(def[i]['position']);
        for j:=0 to length(value)-1 do
        begin
            r := 0;
            stream.Read(r, 1);
            if r <> value[j] then break;
            if j = length(value)-1 then return def[i]['name'];
        end
    end
    return '';
end;

function TSPdfParagraphRange.GetParagraphLineSpace(size: real; line: integer): real;
begin
    if not line then line := 12;
    lines := roundto(line / 12, -1);
    multi := ceil(size / sect_ware_.BaseSize) * lines;
    return sect_ware_.SectPr.DocGrid.LinePitch * multi;
end;

function TSPdfParagraphRange.SetPPr(var ppr: PPr);
begin
    new_ppr := new PPr();
    styles := class(TSPdfSingletonKit).GetComponent(docx_components_, "styles");
    new_ppr.Copy(styles.DocDefaults.PPrDefault.PPr);
    new_ppr.RPr.Copy(styles.DocDefaults.RPrDefault.RPr);
    self.SetPPrByStyleId(new_ppr, extra_style_id_);
    self.SetPPrByStyleId(new_ppr, ppr.PStyle.Val);
    new_ppr.Copy(ppr);
    ppr.Copy(new_ppr);
end;

function TSPdfParagraphRange.SetPPrByStyleId(var ppr: PPr; style_id: string);
begin
    styles := class(TSPdfSingletonKit).GetComponent(docx_components_, "styles_adapter");
    style := styles.StyleId(style_id);
    if ifObj(style) then
    begin
        based_on := style.BasedOn.Val;
        self.SetPPrByStyleId(ppr, based_on);
        ppr.Copy(style.PPr);
        ppr.RPr.Copy(style.RPr);
    end
end;

function TSPdfParagraphRange.SetRPr(var rpr; ppr: PPr);
begin
    // rpr，先继承ppr，再继承样式，最后继承自己
    new_rpr := new RPr();
    style_id := rpr.RStyle.Val;
    new_rpr.Copy(ppr.RPr);
    self.SetRPrByStyleId(new_rpr, style_id);
    new_rpr.Copy(rpr);
    rpr.Copy(new_rpr);
end;

function TSPdfParagraphRange.SetRPrByStyleId(var rpr: RPr; style_id: string);
begin
    styles := class(TSPdfSingletonKit).GetComponent(docx_components_, "styles_adapter");
    style := styles.StyleId(style_id);
    if ifObj(style) then
    begin
        based_on := style.BasedOn.Val;
        self.SetRPrByStyleId(rpr, based_on);
        rpr.Copy(style.RPr);
    end
end;

function TSPdfParagraphRange.SetLvlText();
begin
    numbering_ware := class(TSPdfSingletonKit).GetComponent(docx_components_, "numbering_ware");
    if not ifObj(numbering_ware) then return;
    [lvl_text, lvl] := numbering_ware.GetNumberLvl(paragraph_.PPr);
    if lvl_text = "" and ifnil(lvl) then return;
    self.SetRPr(lvl.RPr, paragraph_.PPr);
    rpr := new RPrUnitDecorator(lvl.RPr);
    self.SplitTextToTextRange(lvl_text, rpr);
end;

function TSPdfParagraphRange.ResetCoordinates(ppr);
begin
    // 根据段落的间距确定新的坐标
    sz := ppr.RPr.SzCs.Val ? ppr.RPr.SzCs.Val : ppr.RPr.Sz.Val ? ppr.RPr.Sz.Val : docx_to_pdf_.Font.GetDefaultSz();
    self.X += ppr.Ind.LeftChars ? ppr.Ind.LeftChars * sz : ppr.Ind.Left;
    self.W -= ppr.Ind.LeftChars ? ppr.Ind.LeftChars * sz : ppr.Ind.Left;
    self.W -= ppr.Ind.RightChars ? ppr.Ind.RightChars * sz : ppr.Ind.Right;
end;