type TSDocxToPdf = class
uses TSPdfEnumerations, DocxML, DocxMLAdapter, DocxMLUnitDecorator, DTPModules, DTPUtils, DTPAdvancedRanges;
public
    function Create(alias: string; file: string);
    function Destroy();
    function SaveToFile(alias: string; file: string): integer;
    function Transform();

    function GetCachePath(image_path: string): string;
    function GetCurrentXmlFile(): string;
    function GetCurrentNoteModule(): NoteModule;

    function AddPage(flag: boolean): Page;
    function ProcessNumpages();

    // docx页码扩展
    function UpdateDocxPageNumPages();
    function SaveDocxFile();overload;
    function SaveDocxFile(alias: string; file: string);overload;

    property PdfFile read pdf_;
    property Font read font_module_;
    property PageManager read page_manager_module_;
    property Toc read toc_module_;
    property Note read note_module_;

private
    function InitDocxComponents(alias: string; file: string);
    function InitCachePath(file: string);
    function InitPdfEncoder();
    function InitSectModule();
    function AllocateElementsToSectModule();
    function ClassifyCols(var point: Point; cols: Cols);

    function SetHdr(type: string);
    function SetFtr(type: string);
    function TransformP(paragraph: P; x: real; y: real; w: real; lb: real): ParagraphRange;
    function TransformTbl(table: Tbl; x: real; y: real; w: real; lb: real): TableRange;
    function TransformSdt(sdt: Sdt; x: real; y: real; w: real; lb: real): array of ParagraphRange;

private
    pdf_: PdfFile;
    docx_components_module_: DocxComponentsModule; // TSDocxComponentsModule
    cache_path_: string; // 临时目录，用来存放临时文件
    font_module_: FontModule;     // 字体模块
    sect_module_array_: array of SectModule; // 页面布局模块数组
    current_sect_module_: SectModule;
    current_sect_pr_adapter_: SectPrAdapter;

    page_manager_module_: PageManagerModule;
    current_page_: Page;

    toc_module_: TocModule; // 目录模块
    note_module_: NoteModule; // 脚注/尾注

    range_page_number_array_: tableArray;

    xml_file_: string;
    even_and_odd_flag_: boolean;

    // 回写docx
    docx_page_arr_: tableArray;
    update_docx_pages_: boolean;
end;

function TSDocxToPdf.Create(alias: string; file: string);
begin
    pdf_ := new PdfFile();
    pdf_.SetCompressionMode(TSPdfEnumerations.COMP_ALL);
    font_module_ := new DTPModules.FontModule(pdf_);
    {self.}InitPdfEncoder();
    {self.}InitDocxComponents(alias, file);
    {self.}InitCachePath(file);
    {self.}InitSectModule();

    current_page_ := nil;
    page_manager_module_ := new DTPModules.PageManagerModule(pdf_);

    toc_module_ := new DTPModules.TocModule();
    range_page_number_array_ := array();

    xml_file_ := "document.xml";
    settings := docx_components_module_.Settings;
    settings.XmlChildEvenAndOddHeaders.Deserialize();
    even_and_odd_flag_ := settings.EvenAndOddHeaders ? true : false;
    note_module_ := new ;

    // 回写docx
    docx_page_arr_ := array();
    update_docx_pages_ := false;
end;

function TSDocxToPdf.Destroy();
begin
    removeDir("", cache_path_);
end;

function TSDocxToPdf.SaveToFile(alias: string; file: string): integer;
begin
    return pdf_.SaveToFile(alias, file);
end;

function TSDocxToPdf.Transform();
begin
    for _,sect_module in sect_module_array_ do
    begin
        if current_sect_module_ <> sect_module then
        begin
            current_sect_module_ := sect_module;
            current_sect_pr_adapter_ := new SectPrAdapter(current_sect_module_.SectPr.GetObject());
            {self.}AddPage(true);
            xml_file_ := "document.xml";
        end

        // 分栏
        elements := sect_module.Elements();
        cols := current_sect_module_.SectPr.Cols;
        if cols.Num > 1 then
        begin
            columns := {self.}ClassifyCols(current_page_.TextPoint, cols);
        end
        else begin
            w := current_page_.SectPr.PgSz.W - current_page_.SectPr.PgMar.Right - current_page_.SectPr.PgMar.Left;
            lb := max(current_page_.SectPr.PgMar.Bottom, current_page_.FtrPoint.Y);
            for _,element in elements do
            begin
                x := current_page_.TextPoint.X;
                y := current_page_.TextPoint.Y;
                // if _ = 266 then break;
                // if _ = 20 then
                    // println("_ = {}, xml_file_ = {}, error = {}", _, xml_file_, pdf_.GetError());
                range := nil;
                if element.LocalName = "p" then range := {self.}TransformP(element, x, y, w, lb);
                else if element.LocalName = "tbl" then range := {self.}TransformTbl(element, x, y, w, lb);
                else if element.LocalName = "sdt" then {self.}TransformSdt(element, x, y, w, lb);
                if ifObj(range) then
                begin
                    current_page_.TextPoint.Y := range.EndY;
                    range.Do();
                end
            end
        end
    end
    {self.}ProcessNumpages();
end;

function TSDocxToPdf.GetCachePath(image_path: string): string;
begin
    return cache_path_ + extractFileName(image_path);
end;

function TSDocxToPdf.GetCurrentXmlFile(): string;
begin
    return xml_file_;
end;

function TSDocxToPdf.InitPdfEncoder();
begin
    pdf_.UseCNSFonts();
    pdf_.UseCNSEncodings();
    // pdf_.UseUTFEncodings();
end;

function TSDocxToPdf.InitDocxComponents(alias: string; file: string);
begin
    docx_components_module_ := new DTPModules.DocxComponentsModule();
    [err, msg] := docx_components_module_.Open(alias, file, nil);
    if err then raise "Open file error.";
end;

function TSDocxToPdf.InitCachePath(file: string);
begin
    path := format("%s_%s", extractFileName(file), formatDatetime("YYYYMMDDHHNNSSZZZ", now()));
    cache_dir := format("%s/funcext/PdfConverter/.cache", extractFileDir(sysExecName()));
    createDir("", cache_dir);
    cache_path_ := format("%s/%s/", cache_dir, path);
    createDir("", cache_path_);
end;

function TSDocxToPdf.InitSectModule();
begin
    sect_module_array_ := array();
    current_sect_module_ := nil;
    current_sect_pr_adapter_ := nil;
    document := docx_components_module_.Document;
    document.Deserialize();
    {self.}AllocateElementsToSectModule();
end;

function TSDocxToPdf.AllocateElementsToSectModule();
begin
    elements := docx_components_module_.Document.Body.Elements();
    module := new DTPModules.SectModule();
    fp := function(module, sect);
    begin
        sect := new SectPrUnitDecorator(sect);
        sect.PgSz.Orient := sect.PgSz.Orient ? "portrait" : "landscape";
        sect.Type.Val := sect.Type.Val ?: "nextPage";
        module.SectPr := sect;
    end
    for i:=0 to length(elements)-1 do
    begin
        element := elements[i];
        module.AddElement(element);
        if element.LocalName = "p" and ifObj(element.PPr.SectPr) then
        begin
            ##fp(module, element.PPr.SectPr);
            sect_module_array_[length(sect_module_array_)] := module;
            module := new DTPModules.SectModule();
        end
        else if element.LocalName = "sectPr" and i = length(elements)-1 then
        begin
            ##fp(module, element);
            sect_module_array_[length(sect_module_array_)] := module;
        end
    end
    // println("sect_module_array_ = {}", sect_module_array_);
end;

function TSDocxToPdf.AddPage(flag: boolean = false): Page;
begin
    if current_sect_module_.SectPr.Type.Val = "continuous" and page_manager_module_.Count <> 0 then return;

    page := page_manager_module_.NewPage();
    page.SectPr := current_sect_module_.SectPr;
    page.Number := flag ? ifnil(current_sect_module_.SectPr.PgNumType.Start) ? 1 : current_sect_module_.SectPr.PgNumType.Start : page_manager_module_[page_manager_module_.Count() - 2].Number + 1;
    page.BaseSize := round(page.SectPr.DocGrid.LinePitch * 0.75);

    // 正文、页眉页脚坐标
    // 页眉：从上往下，不需要调整
    page.HdrPoint.X := page.SectPr.PgMar.Left;
    page.HdrPoint.Y := page.SectPr.PgSz.H - page.SectPr.PgMar.Header;
    // 页脚：从下往上，需要调整
    page.FtrPoint.X := page.SectPr.PgMar.Left;
    page.FtrPoint.Y := page.SectPr.PgSz.H;
    // 正文：运行完页眉页脚后需要再次计算
    page.TextPoint.X := page.SectPr.PgMar.Left;
    page.TextPoint.Y := page.SectPr.PgSz.H - max(page.SectPr.PgMar.Top, page.SectPr.PgMar.Header);

    current_page_ := page;
    // println("TextPoint.X = {}, TextPoint.Y = {}", current_page_.TextPoint.X, current_page_.TextPoint.Y);
    // println("len = {}, Number = {}", page_manager_module_.Count(), current_page_.Number);

    // 页眉页脚
    if current_sect_module_.SectPr.TitlePg and current_page_.Index = 0 then
        type_name := "first";
    else if not even_and_odd_flag_ then
        type_name := "default";
    else if not odd(current_page_.Index) then
        type_name := "even"
    else
        type_name := "default";

    bk_file := xml_file_;
    {self.}SetHdr(type_name);
    {self.}SetFtr(type_name);
    xml_file_ := bk_file;

    // println("W = {}, H = {}", current_page_.SectPr.PgSz.W, current_page_.SectPr.PgSz.H);
    // println("Top = {}, Bottom = {}", current_page_.SectPr.PgMar.Top, current_page_.SectPr.PgMar.Bottom);
    // println("Left = {}, Right = {}", current_page_.SectPr.PgMar.Left, current_page_.SectPr.PgMar.Right);
    // println("Header = {}", current_page_.SectPr.PgMar.Header);
    // println("TextPoint.X = {}, TextPoint.Y = {}", current_page_.TextPoint.X, current_page_.TextPoint.Y);
    // println("HdrPoint.X = {}, HdrPoint.Y = {}", current_page_.HdrPoint.X, current_page_.HdrPoint.Y);
    // println("FtrPoint.X = {}, FtrPoint.Y = {}", current_page_.FtrPoint.X, current_page_.FtrPoint.Y);

    return current_page_;
end;

function TSDocxToPdf.SetFtr(type: string);
begin
    footer_reference := current_sect_pr_adapter_.GetFooterReferenceByType(type);
    ftr_range := array();
    if ifObj(footer_reference) then
    begin
        rels_adapter := docx_components_module_.GetDocumentRelsAdapter();
        rel := rels_adapter.GetRelationshipById(footer_reference.Id);
        w := current_page_.SectPr.PgSz.W - current_page_.SectPr.PgMar.Right - current_page_.SectPr.PgMar.Left;
        lb := 0;
        obj := docx_components_module_.GetFtr(rel.Target);
        xml_file_ := rel.Target;
        elements := obj.Elements();
        for _,element in elements do
        begin
            x := current_page_.FtrPoint.X;
            y := current_page_.FtrPoint.Y;
            range := nil;
            if element.LocalName = "p" then range := {self.}TransformP(element, x, y, w, lb);
            if ifObj(range) then
            begin
                current_page_.FtrPoint.Y := range.EndY;
                ftr_range[length(ftr_range)] := range;
            end
        end
    end
    last_range := ftr_range[length(ftr_range)-1];
    y_offset := last_range.EndY - current_page_.SectPr.PgMar.Bottom;
    height := 0;
    for _,range in ftr_range do
    begin
        range.Offset(0, y_offset);
        range.Do();
        height += range.DynamicHeight;
    end
    current_page_.FtrPoint.Y := current_page_.SectPr.PgMar.Bottom + height;
end;

function TSDocxToPdf.SetHdr(type: string);
begin
    header_reference := current_sect_pr_adapter_.GetHeaderReferenceByType(type);
    if ifObj(header_reference) then
    begin
        rels_adapter := docx_components_module_.GetDocumentRelsAdapter();
        rel := rels_adapter.GetRelationshipById(header_reference.Id);
        w := current_page_.SectPr.PgSz.W - current_page_.SectPr.PgMar.Right - current_page_.SectPr.PgMar.Left;
        lb := 0;
        obj := docx_components_module_.GetHdr(rel.Target);
        xml_file_ := rel.Target;
        elements := obj.Elements();
        for _,element in elements do
        begin
            x := current_page_.HdrPoint.X;
            y := current_page_.HdrPoint.Y;
            range := nil;
            if element.LocalName = "p" then range := {self.}TransformP(element, x, y, w, lb);
            if ifObj(range) then
            begin
                current_page_.HdrPoint.Y := range.EndY;
                range.Do();
                current_page_.TextPoint.Y := min(current_page_.TextPoint.Y, range.EndY);
            end
        end
    end
end;

function TSDocxToPdf.TransformP(paragraph: P; x: real; y: real; w: real; lb: real): ParagraphRange;
begin
    range := new ParagraphRange(self, current_page_, docx_components_module_, paragraph);
    range.StartX := x;
    range.StartY := y;
    range.Width := w;
    range.LowerBound := lb;
    range.Parent := self;
    r := range.Calc();
    if r then return range;
    else range_page_number_array_[length(range_page_number_array_)] := range;
    return nil;
end;

function TSDocxToPdf.TransformTbl(table: Tbl; x: real; y: real; w: real; lb: real): TableRange;
begin
    range := new TableRange(self, current_page_, docx_components_module_, table);
    range.StartX := x;
    range.StartY := y;
    range.Width := w;
    range.LowerBound := lb;
    range.Parent := self;
    range.Calc();
    return range;
end;

function TSDocxToPdf.TransformSdt(sdt: Sdt; x: real; y: real; w: real; lb: real): array of ParagraphRange;
begin
    ps := sdt.SdtContent.Ps();
    arr := array();
    for _,p in ps do
    begin
        range := {self.}TransformP(p, x, y, w, lb);
        if ifObj(range) then arr[length(arr)] := range;
    end
    return arr;
end;

function TSDocxToPdf.ProcessNumpages();
begin
    nums := page_manager_module_[page_manager_module_.Count() - 1].Number;
    for _,range in range_page_number_array_ do
    begin
        range.SetNumPages(nums);
        range.RangesToLines();
        range.Offset(0, current_page_.SectPr.PgSz.H - current_page_.SectPr.PgMar.Bottom);
        range.Do();
    end
end;

function TSDocxToPdf.UpdateDocxPageNumPages();
begin
    toc_module_.UpdateDocxNumPages();
end;

function TSDocxToPdf.SaveDocxFile();overload;
begin
    return docx_components_module_.Save();
end;

function TSDocxToPdf.SaveDocxFile(alias: string; file: string);overload;
begin
    return docx_components_module_.SaveAs(alias, file);
end;

function TSDocxToPdf.GetCurrentNoteModule(): NoteModule;
begin
    if ifnil(note_module_) then note_module_ := new NoteModule(current_sect_module_);
    return note_module_;
end;

function TSDocxToPdf.ClassifyCols(var point: Point; cols: Cols);
begin
    bk_page := current_page_;
    columns := array();
    x := point.X;
    y := point.Y;
    w := current_page_.SectPr.PgSz.W - current_page_.SectPr.PgMar.Right - current_page_.SectPr.PgMar.Left;
    lb := current_page_.SectPr.PgMar.Bottom;
    w_array := array();
    ccols := cols.Cols();
    for i:=0 to cols.Num-1 do
    begin
        rw := 0;
        if cols.EqualWidth = "0" then
        begin
            rw := ccols[i].W;
            if i > 0 then x += ccols[i-1].W + ccols[i-1].Space;
        end
        else begin
            rw := w / 3;
            x := point.X + i * rw + i * cols.Space;
        end
        range := new ColumnRange(self, current_page_, docx_components_module_);
        range.StartX := x;
        range.StartY := y;
        range.Width := rw;
        range.LowerBound := lb;
        columns[length(columns)] := range;
    end
    i := 0;
    elements := current_sect_module_.Elements();
    range := columns[0];
    for _,element in elements do
    begin
        if element.LocalName = "p" then
        begin
            p := new P();
            sub_elements := element.Elements();
            for _,sub in sub_elements do
            begin
                p.AppendChild(sub);
                if sub.LocalName = "r" and sub.Br.Type = "column" then
                begin
                    range.AddElement(p);
                    p := new P();
                    p.PPr.Copy(element.PPr);
                    range := columns[++i];
                end
            end
            range.AddElement(p);
        end
        else begin
            range.AddElement(element);
        end
    end
    pg := nil;
    max_y := nil;
    for _,column in columns do
    begin
        column.Do();
        page := column.GetLastPage();
        if ifnil(pg) then pg := page;
        if ifnil(max_y) then max_y := range.EndY;
        if page.Index > pg.Index then max_y := range.EndY;
        else if page.Index = pg.Index and max_y > range.EndY then max_y := range.EndY;
    end
    current_page_ := bk_page;
    point.Y := max_y;
end;