type TSPdfTableRange = class(TSPdfBasicRange)
public
    function Create(docx_to_pdf: TSDocxToPdf; pg: TSPage; components: Components; table: Tbl);
    function Do();override;
    function Calc();
    function GetLastPage(): TSPage;
    function Rows(): integer;
    function Cols(): integer;

private
    function GetCellMatrix(grid_cols: array of GridColUnitDecorator);
    function CreateTableMatrix(grid_cols: array of GridColUnitDecorator; trs: array of Tr);
    function ComputeMatrixCells();
    function ResetCoordinates(tbl_pr: TblPrUnitDecorator; grid_cols: array of GridCol);
    function SetTblTblPr(var table: Tbl);
    function SetTblPrByStyleId(var tbl_pr: TblPr; style_id: string);
    function SetTrTrPr(var tr_pr: TrPr);
    function SetTrPrByStyleId(var tr_pr: TrPr; style_id: string);
    function SetTcTcPr(var tc: Tc);
    function SetTcPrByStyleId(var tc_pr: TcPr; style_id: string);
    function OverrideTcPrByTblStylePrType(var tc_pr: TcPr; type: string);

private
    [weakref]docx_to_pdf_: TSDocxToPdf;
    [weakref]last_page_: TSPage;
    [weakref]docx_components_ware_: Components;
    [weakref]table_: Tbl;
    tbl_pr_unit_decorator_: TblPrUnitDecorator;
    ts_trpr_array_: array of TSTrProperty;
    cell_range_matrix_: array of TSPdfCellRange;
    rows_: integer;
    cols_: integer;
end;

function TSPdfTableRange.Create(docx_to_pdf: TSDocxToPdf; pg: PdfPage; components: Components; table: Tbl);
begin
    docx_to_pdf_ := docx_to_pdf;
    last_page_ := pg;
    docx_components_ware_ := Components;
    table_ := table;
    ts_trpr_array_ := array();
    cell_range_matrix_ := array();
    rows_ := 0;
    cols_ := 0;
    {self.}TSPage := last_page_;
end;

function TSPdfTableRange.Calc();
begin
    {self.}SetTblTblPr(table_);
    tbl_pr_unit_decorator_ := new TblPrUnitDecorator(table_.TblPr);
    grid_cols := table_.TblGrid.GridCols();
    for i:=0 to length(grid_cols)-1 do
        grid_cols[i] := new GridColUnitDecorator(grid_cols[i]);
    {self.}ResetCoordinates(tbl_pr_unit_decorator_, grid_cols);
    {self.}EndX := {self.}StartX;
    {self.}EndY := {self.}StartY;
    // 如果是根据内容自适应，应该计算并调整grid_cols的值
    {self.}GetCellMatrix(grid_cols);
end;

function TSPdfTableRange.Do();override;
begin
    for _,row in cell_range_matrix_ do
    begin
        flag := nil;
        for __,range in row do
        begin
            if ifnil(flag) and ifObj(range) then flag := range.IfRemoveEmptyRectangle();
            if ifnil(range) then continue;
            if flag <> range.IfRemoveEmptyRectangle() then
            begin
                flag := false;
                break;
            end
        end
        for __,range in row do
        begin
            if ifObj(range) then
            begin
                range.RemoveFlag := flag;
                range.Do();
            end
        end
    end
end;

function TSPdfTableRange.GetCellMatrix(grid_cols: array of GridColUnitDecorator);
begin
    trs := table_.Trs();
    rows_ := length(trs);
    cols_ := length(grid_cols);
    cell_range_matrix_ := nils(rows_, cols_);
    // 先构建一个矩阵
    {self.}CreateTableMatrix(grid_cols, trs);
    // 遍历矩阵后进行计算合并
    {self.}ComputeMatrixCells();
end;

function TSPdfTableRange.CreateTableMatrix(grid_cols: array of GridColUnitDecorator; trs: array of Tr);
begin
    for i,tr in trs do
    begin
        {self.}SetTrTrPr(tr);
        tr_pr := new TrPrUnitDecorator(tr.TrPr);
        tc_x := {self.}EndX;
        tcs := tr.Tcs();
        trp := new TSTrProperty();
        trp.TrPr := tr_pr;
        ts_trpr_array_[i] := trp;
        pos := 0;
        for j,tc in tcs do
        begin
            {self.}SetTcTcPr(tc);
            if i = 0 then {self.}OverrideTcPrByTblStylePrType(tc.TcPr, "firstRow");
            else if i = length(trs)-1 then {self.}OverrideTcPrByTblStylePrType(tc.TcPr, "lastRow")
            else if (i + 1) % 2 = 0 then {self.}OverrideTcPrByTblStylePrType(tc.TcPr, "band1Horz");
            else {self.}OverrideTcPrByTblStylePrType(tc.TcPr, "band2Horz");

            grid_span := new GridSpanUnitDecorator(tc.TcPr.GridSpan);
            if tc.TcPr.VMerge and tc.TcPr.VMerge <> "restart" then
            begin
                tc_x += grid_cols[pos++].W;
                for k:=grid_span.Val-1 downto 1 do
                    tc_x += grid_cols[pos++].W;
                continue;
            end
            cell_range := new TSPdfCellRange(self, docx_to_pdf_, last_page_, docx_components_ware_, tc, tbl_pr_unit_decorator_, trp);
            cell_range.StartX := tc_x;
            cell_range.Width := grid_cols[pos].W;
            cell_range.LowerBound := {self.}LowerBound;
            cell_range.FixedHeight := tr_pr.TrHeight.Val;
            cell_range.Row := i;
            cell_range.Col := pos;
            cell_range_matrix_[i][pos] := cell_range;
            pos++;
            for k:=grid_span.Val-1 downto 1 do
                cell_range.Width += grid_cols[pos++].W;
            tc_x += cell_range.Width;
        end
    end

    // for i,arr in cell_range_matrix_ do
    //     println("i = {}, arr = {}", i, arr);
    // println("\n");
    return;
end;

function TSPdfTableRange.ComputeMatrixCells();
begin
    i := 0;
    merge_arr := array();
    vmerge_height := array();
    while i < rows_ do
    begin
        j := 0;
        tc_y := {self.}EndY;
        recompute_flag := false;
        while j < cols_ do
        begin
            range := cell_range_matrix_[i][j];
            if ifnil(range) then
            begin
                j++;
                continue;
            end
            range.StartY := tc_y;
            range.SetTSPage(last_page_);
            range.Calc();
            if range.IsReComputeByCantSplit() then
            begin
                // 调整上一行的下边界
                arr := cell_range_matrix_[i-1];
                for _,r in arr do
                begin
                    if ifnil(r) then
                    begin
                        pos := i-2;
                        while pos > 0 do
                        begin
                            rr := cell_range_matrix_[pos][_];
                            pos--;
                            if ifnil(rr) then continue;
                            rr.LowerBound := tc_y;
                            break;
                        end
                    end
                    if not ifnil(r) then r.LowerBound := tc_y;
                end
                last_page_ := docx_to_pdf_.GetNextPage(last_page_);
                [x, y] := docx_to_pdf_.CalculateTextCoordinates();
                {self.}EndY := y;
                j := 0;
                recompute_flag := true;
                arr := cell_range_matrix_[i];
                for _,r in arr do
                    if not ifnil(r) then r.SetTop();
                break;
            end
            if range.Tc.TcPr.VMerge then
            begin
                b_merge_index := i;
                e_merge_index := i + 1;
                while ifnil(cell_range_matrix_[e_merge_index+1][j]) and e_merge_index < rows_-1 do
                    e_merge_index++;
                merge_arr[e_merge_index][j] := b_merge_index;
                range.VMerge := e_merge_index;
                if ifnil(vmerge_height[e_merge_index]) or range.DynamicHeight > vmerge_height[e_merge_index] then
                    vmerge_height[e_merge_index] := range.DynamicHeight;
            end
            j++;
        end
        if recompute_flag then continue;
        i_height := 0;
        for k,v in merge_arr[i] do
        begin
            i_height := ts_trpr_array_[i].Height;
            r := cell_range_matrix_[v][k];
            total_height := 0;
            for index:=v to i-1 do
                total_height += ts_trpr_array_[index].Height;
            h := vmerge_height[i];
            if h > total_height + i_height then
                i_height := h - total_height;
            else
                h := total_height + i_height;
            r.AlignHeight(h);
            r.SetVAlign();
        end
        if i_height then ts_trpr_array_[i].Height := i_height;
        for _,range in cell_range_matrix_[i] do
        begin
            if not ifObj(range) or range.Tc.TcPr.VMerge then continue;
            range.AlignHeight(ts_trpr_array_[i].Height);
            range.SetVAlign();
            {self.}EndY := range.EndY;
            last_page_ := range.GetLastPage();
        end
        i++;
    end
end;

function TSPdfTableRange.OverrideTcPrByTblStylePrType(var tc_pr: TcPr; type: string);
begin
    // tc_pr应该是经过外层copy的
    tbl_style_pr := docx_components_ware_.GetTblStylePrByType(tbl_pr_unit_decorator_.TblStyle.Val, type);
    if tbl_style_pr then tc_pr.Copy(tbl_style_pr.TcPr);
end;

function TSPdfTableRange.ResetCoordinates(tbl_pr: TblPr; grid_cols: array of GridCol);
begin
    total_width := 0;
    for _,grid_col in grid_cols do
        total_width += grid_col.W;
    diff := total_width - {self.}Width;
    case tbl_pr.Jc.Val of
        "center":
        begin
            offset := diff/2;
            {self.}StartX -= offset;
        end
        "right":
        begin
            {self.}StartX -= diff;
        end
    end;
    {self.}Width := total_width;
end;

function TSPdfTableRange.SetTblTblPr(var tbl: Tbl);
begin
    new_tbl_pr := new TblPr();
    {self.}SetTblPrByStyleId(new_tbl_pr, tbl.TblPr.TblStyle.Val);
    new_tbl_pr.Copy(tbl.TblPr);
    tbl.TblPr.Copy(new_tbl_pr);
end;

function TSPdfTableRange.SetTblPrByStyleId(var tbl_pr: TblPr; style_id: string);
begin
    styles := docx_components_ware_.GetStylesAdapter();
    style := styles.GetStyleByStyleId(style_id);
    if ifObj(style) then
    begin
        based_on := style.BasedOn.Val;
        {self.}SetTblPrByStyleId(tbl_pr, based_on);
        tbl_pr.Copy(style.TblPr);
    end
end;

function TSPdfTableRange.SetTrTrPr(var tr: Tr);
begin
    new_tr_pr := new TrPr();
    {self.}SetTrPrByStyleId(new_tr_pr, tbl_pr_unit_decorator_.TblStyle.Val);
    new_tr_pr.Copy(tr.TrPr);
    tr.TrPr.Copy(new_tr_pr);
end;

function TSPdfTableRange.SetTrPrByStyleId(var tr_pr: TrPr; style_id: string);
begin
    styles := docx_components_ware_.GetStylesAdapter();
    style := styles.GetStyleByStyleId(style_id);
    if ifObj(style) then
    begin
        based_on := style.BasedOn.Val;
        {self.}SetTrPrByStyleId(tr_pr, based_on);
        tr_pr.Copy(style.TrPr);
    end
end;

function TSPdfTableRange.SetTcTcPr(var tc: Tc);
begin
    new_tc_pr := new TcPr();
    {self.}SetTcPrByStyleId(new_tc_pr, tbl_pr_unit_decorator_.TblStyle.Val);
    new_tc_pr.Copy(tc.TcPr);
    tc.TcPr.Copy(new_tc_pr);
end;

function TSPdfTableRange.SetTcPrByStyleId(var tc_pr: TcPr; style_id: string);
begin
    styles := docx_components_ware_.GetStylesAdapter();
    style := styles.GetStyleByStyleId(style_id);
    if ifObj(style) then
    begin
        based_on := style.BasedOn.Val;
        {self.}SetTcPrByStyleId(tc_pr, based_on);
        tc_pr.Copy(style.TcPr);
    end
end;

function TSPdfTableRange.GetLastPage(): TSPage;
begin
    return last_page_;
end;

function TSPdfTableRange.Rows(): integer;
begin
    return rows_;
end;

function TSPdfTableRange.Cols(): integer;
begin
    return cols_;
end;