Пример #1
0
        /// <summary>
        /// Gets the available width for the whole table.
        /// It also sets the value of <see cref="WidthSpecified"/>
        /// </summary>
        /// <returns></returns>
        /// <remarks>
        /// The table's width can be larger than the result of this method, because of the minimum
        /// size that individual boxes.
        /// </remarks>
        private float GetAvailableWidth()
        {
            CssLength tblen = new CssLength(TableBox.Width);

            if (tblen.Number > 0)
            {
                _widthSpecified = true;

                if (tblen.IsPercentage)
                {
                    return(CssValue.ParseNumber(tblen.Length, TableBox.ParentBox.AvailableWidth));
                }
                else
                {
                    return(tblen.Number);
                }
            }
            else
            {
                return(TableBox.ParentBox.AvailableWidth);
            }
        }
        /// <summary>
        /// Gets the white space width of the specified box
        /// </summary>
        /// <param name="g"></param>
        /// <param name="b"></param>
        /// <returns></returns>
        public static float WhiteSpace(Graphics g, CssBox b)
        {
            string space   = " .";
            float  w       = 0f;
            float  onError = 5f;

            StringFormat sf = new StringFormat();

            sf.SetMeasurableCharacterRanges(new CharacterRange[] { new CharacterRange(0, 1) });
            Region[] regs = g.MeasureCharacterRanges(space, b.ActualFont, new RectangleF(0, 0, float.MaxValue, float.MaxValue), sf);

            if (regs == null || regs.Length == 0)
            {
                return(onError);
            }

            w = regs[0].GetBounds(g).Width;

            if (!(string.IsNullOrEmpty(b.WordSpacing) || b.WordSpacing == CssConstants.Normal))
            {
                w += CssValue.ParseLength(b.WordSpacing, 0, b);
            }
            return(w);
        }
Пример #3
0
        /// <summary>
        /// Gets the span attribute of the tag of the specified box
        /// </summary>
        /// <param name="b"></param>
        private int GetSpan(CssBox b)
        {
            float f = CssValue.ParseNumber(b.GetAttribute("span"), 1);

            return(Math.Max(1, Convert.ToInt32(f)));
        }
Пример #4
0
        /// <summary>
        /// Analyzes the Table and assigns values to this CssTable object.
        /// To be called from the constructor
        /// </summary>
        private void Analyze(Graphics g)
        {
            float availSpace     = GetAvailableWidth();
            float availCellSpace = float.NaN; //Will be set later

            #region Assign box kinds
            foreach (CssBox b in TableBox.Boxes)
            {
                b.RemoveAnonymousSpaces();
                switch (b.Display)
                {
                case CssConstants.TableCaption:
                    _caption = b;
                    break;

                case CssConstants.TableColumn:
                    for (int i = 0; i < GetSpan(b); i++)
                    {
                        Columns.Add(CreateColumn(b));
                    }
                    break;

                case CssConstants.TableColumnGroup:
                    if (b.Boxes.Count == 0)
                    {
                        int gspan = GetSpan(b);
                        for (int i = 0; i < gspan; i++)
                        {
                            Columns.Add(CreateColumn(b));
                        }
                    }
                    else
                    {
                        foreach (CssBox bb in b.Boxes)
                        {
                            int bbspan = GetSpan(bb);
                            for (int i = 0; i < bbspan; i++)
                            {
                                Columns.Add(CreateColumn(bb));
                            }
                        }
                    }
                    break;

                case CssConstants.TableFooterGroup:
                    if (FooterBox != null)
                    {
                        BodyRows.Add(b);
                    }
                    else
                    {
                        _footerBox = b;
                    }
                    break;

                case CssConstants.TableHeaderGroup:
                    if (HeaderBox != null)
                    {
                        BodyRows.Add(b);
                    }
                    else
                    {
                        _headerBox = b;
                    }
                    break;

                case CssConstants.TableRow:
                    BodyRows.Add(b);
                    break;

                case CssConstants.TableRowGroup:
                    foreach (CssBox bb in b.Boxes)
                    {
                        if (b.Display == CssConstants.TableRow)
                        {
                            BodyRows.Add(b);
                        }
                    }
                    break;

                default:
                    break;
                }
            }
            #endregion

            #region Gather AllRows

            if (HeaderBox != null)
            {
                _allRows.AddRange(HeaderBox.Boxes);
            }
            _allRows.AddRange(BodyRows);
            if (FooterBox != null)
            {
                _allRows.AddRange(FooterBox.Boxes);
            }

            #endregion

            #region Insert EmptyBoxes for vertical cell spanning

            if (!TableBox.TableFixed)
            {
                int           currow = 0;
                int           curcol = 0;
                List <CssBox> rows   = BodyRows;

                foreach (CssBox row in rows)
                {
                    row.RemoveAnonymousSpaces();
                    curcol = 0;
                    for (int k = 0; k < row.Boxes.Count; k++)
                    {
                        CssBox cell    = row.Boxes[k];
                        int    rowspan = GetRowSpan(cell);
                        int    realcol = GetCellRealColumnIndex(row, cell); //Real column of the cell

                        for (int i = currow + 1; i < currow + rowspan; i++)
                        {
                            int colcount = 0;
                            for (int j = 0; j <= rows[i].Boxes.Count; j++)
                            {
                                if (colcount == realcol)
                                {
                                    rows[i].Boxes.Insert(colcount, new SpacingBox(TableBox, ref cell, currow));
                                    break;
                                }
                                colcount++;
                                realcol -= GetColSpan(rows[i].Boxes[j]) - 1;
                            }
                        } // End for (int i = currow + 1; i < currow + rowspan; i++)
                        curcol++;
                    }     // End foreach (Box cell in row.Boxes)
                    currow++;
                }         // End foreach (Box row in rows)

                TableBox.TableFixed = true;
            } // End if (!TableBox.TableFixed)

            #endregion

            #region Determine Row and Column Count, and ColumnWidths

            //Rows
            _rowCount = BodyRows.Count +
                        (HeaderBox != null ? HeaderBox.Boxes.Count : 0) +
                        (FooterBox != null ? FooterBox.Boxes.Count : 0);

            //Columns
            if (Columns.Count > 0)
            {
                _columnCount = Columns.Count;
            }
            else
            {
                foreach (CssBox b in AllRows) //Check trhough rows
                {
                    _columnCount = Math.Max(_columnCount, b.Boxes.Count);
                }
            }

            //Initialize column widths array
            _columnWidths = new float[_columnCount];

            //Fill them with NaNs
            for (int i = 0; i < _columnWidths.Length; i++)
            {
                _columnWidths[i] = float.NaN;
            }

            availCellSpace = GetAvailableCellWidth();

            if (Columns.Count > 0)
            {
                #region Fill ColumnWidths array by scanning column widths

                for (int i = 0; i < Columns.Count; i++)
                {
                    CssLength len = new CssLength(Columns[i].Width); //Get specified width

                    if (len.Number > 0)                              //If some width specified
                    {
                        if (len.IsPercentage)                        //Get width as a percentage
                        {
                            ColumnWidths[i] = CssValue.ParseNumber(Columns[i].Width, availCellSpace);
                        }
                        else if (len.Unit == CssLength.CssUnit.Pixels || len.Unit == CssLength.CssUnit.None)
                        {
                            ColumnWidths[i] = len.Number; //Get width as an absolute-pixel value
                        }
                    }
                }

                #endregion
            }
            else
            {
                #region Fill ColumnWidths array by scanning width in table-cell definitions
                foreach (CssBox row in AllRows)
                {
                    //Check for column width in table-cell definitions
                    for (int i = 0; i < _columnCount; i++)
                    {
                        if (float.IsNaN(ColumnWidths[i]) &&                    //Check if no width specified for column
                            i < row.Boxes.Count &&                             //And there's a box to check
                            row.Boxes[i].Display == CssConstants.TableCell)    //And the box is a table-cell
                        {
                            CssLength len = new CssLength(row.Boxes[i].Width); //Get specified width

                            if (len.Number > 0)                                //If some width specified
                            {
                                int   colspan = GetColSpan(row.Boxes[i]);
                                float flen    = 0f;
                                if (len.IsPercentage)//Get width as a percentage
                                {
                                    flen = CssValue.ParseNumber(row.Boxes[i].Width, availCellSpace);
                                }
                                else if (len.Unit == CssLength.CssUnit.Pixels || len.Unit == CssLength.CssUnit.None)
                                {
                                    flen = len.Number; //Get width as an absolute-pixel value
                                }
                                flen /= Convert.ToSingle(colspan);

                                for (int j = i; j < i + colspan; j++)
                                {
                                    ColumnWidths[j] = flen;
                                }
                            }
                        }
                    }
                }
                #endregion
            }

            #endregion

            #region Determine missing Column widths

            if (WidthSpecified) //If a width was specified,
            {
                //Assign NaNs equally with space left after gathering not-NaNs
                int   numberOfNans = 0;
                float occupedSpace = 0f;

                //Calculate number of NaNs and occuped space
                for (int i = 0; i < ColumnWidths.Length; i++)
                {
                    if (float.IsNaN(ColumnWidths[i]))
                    {
                        numberOfNans++;
                    }
                    else
                    {
                        occupedSpace += ColumnWidths[i];
                    }
                }

                //Determine width that will be assigned to un asigned widths
                float nanWidth = (availCellSpace - occupedSpace) / Convert.ToSingle(numberOfNans);

                for (int i = 0; i < ColumnWidths.Length; i++)
                {
                    if (float.IsNaN(ColumnWidths[i]))
                    {
                        ColumnWidths[i] = nanWidth;
                    }
                }
            }
            else
            {
                //Assign NaNs using full width
                float[] _maxFullWidths = new float[ColumnWidths.Length];

                //Get the maximum full length of NaN boxes
                foreach (CssBox row in AllRows)
                {
                    for (int i = 0; i < row.Boxes.Count; i++)
                    {
                        int col = GetCellRealColumnIndex(row, row.Boxes[i]);

                        if (float.IsNaN(ColumnWidths[col]) &&
                            i < row.Boxes.Count &&
                            GetColSpan(row.Boxes[i]) == 1)
                        {
                            _maxFullWidths[col] = Math.Max(_maxFullWidths[col], row.Boxes[i].GetFullWidth(g));
                        }
                    }
                }

                for (int i = 0; i < ColumnWidths.Length; i++)
                {
                    if (float.IsNaN(ColumnWidths[i]))
                    {
                        ColumnWidths[i] = _maxFullWidths[i];
                    }
                }
            }

            #endregion

            #region Reduce widths if necessary

            int   curCol       = 0;
            float reduceAmount = 1f;

            //While table width is larger than it should, and width is reductable
            while (GetWidthSum() > GetAvailableWidth() && CanReduceWidth())
            {
                while (!CanReduceWidth(curCol))
                {
                    curCol++;
                }

                ColumnWidths[curCol] -= reduceAmount;

                curCol++;

                if (curCol >= ColumnWidths.Length)
                {
                    curCol = 0;
                }
            }

            #endregion

            #region Check for minimum sizes (increment widths if necessary)

            foreach (CssBox row in AllRows)
            {
                foreach (CssBox cell in row.Boxes)
                {
                    int colspan   = GetColSpan(cell);
                    int col       = GetCellRealColumnIndex(row, cell);
                    int affectcol = col + colspan - 1;

                    if (ColumnWidths[col] < ColumnMinWidths[col])
                    {
                        float diff = ColumnMinWidths[col] - ColumnWidths[col];
                        ColumnWidths[affectcol] = ColumnMinWidths[affectcol];

                        if (col < ColumnWidths.Length - 1)
                        {
                            ColumnWidths[col + 1] -= diff;
                        }
                    }
                }
            }

            #endregion

            #region Set table padding

            TableBox.Padding = "0"; //Ensure there's no padding

            #endregion

            #region Layout cells

            //Actually layout cells!
            float startx     = TableBox.ClientLeft + HorizontalSpacing;
            float starty     = TableBox.ClientTop + VerticalSpacing;
            float curx       = startx;
            float cury       = starty;
            float maxRight   = startx;
            float maxBottom  = 0f;
            int   currentrow = 0;

            foreach (CssBox row in AllRows)
            {
                if (row is CssAnonymousSpaceBlockBox || row is CssAnonymousSpaceBox)
                {
                    continue;
                }

                curx   = startx;
                curCol = 0;

                foreach (CssBox cell in row.Boxes)
                {
                    if (curCol >= ColumnWidths.Length)
                    {
                        break;
                    }

                    int   rowspan = GetRowSpan(cell);
                    float width   = GetCellWidth(GetCellRealColumnIndex(row, cell), cell);

                    cell.Location = new PointF(curx, cury);
                    cell.Size     = new SizeF(width, 0f);
                    cell.MeasureBounds(g); //That will automatically set the bottom of the cell

                    //Alter max bottom only if row is cell's row + cell's rowspan - 1
                    SpacingBox sb = cell as SpacingBox;
                    if (sb != null)
                    {
                        if (sb.EndRow == currentrow)
                        {
                            maxBottom = Math.Max(maxBottom, sb.ExtendedBox.ActualBottom);
                        }
                    }
                    else if (rowspan == 1)
                    {
                        maxBottom = Math.Max(maxBottom, cell.ActualBottom);
                    }
                    maxRight = Math.Max(maxRight, cell.ActualRight);
                    curCol++;
                    curx = cell.ActualRight + HorizontalSpacing;
                }

                foreach (CssBox cell in row.Boxes)
                {
                    SpacingBox spacer = cell as SpacingBox;

                    if (spacer == null && GetRowSpan(cell) == 1)
                    {
                        cell.ActualBottom = maxBottom;
                        CssLayoutEngine.ApplyCellVerticalAlignment(g, cell);
                    }
                    else if (spacer != null && spacer.EndRow == currentrow)
                    {
                        spacer.ExtendedBox.ActualBottom = maxBottom;
                        CssLayoutEngine.ApplyCellVerticalAlignment(g, spacer.ExtendedBox);
                    }
                }

                cury = maxBottom + VerticalSpacing;
                currentrow++;
            }

            TableBox.ActualRight  = maxRight + HorizontalSpacing + TableBox.ActualBorderRightWidth;
            TableBox.ActualBottom = maxBottom + VerticalSpacing + TableBox.ActualBorderBottomWidth;

            #endregion
        }
Пример #5
0
        /// <summary>
        /// Creates a new CssLength from a length specified on a CSS style sheet or fragment
        /// </summary>
        /// <param name="length">Length as specified in the Style Sheet or style fragment</param>
        public CssLength(string length)
        {
            _length       = length;
            _number       = 0f;
            _unit         = CssUnit.None;
            _isPercentage = false;

            //Return zero if no length specified, zero specified
            if (string.IsNullOrEmpty(length) || length == "0")
            {
                return;
            }

            //If percentage, use ParseNumber
            if (length.EndsWith("%", StringComparison.Ordinal))
            {
                _number       = CssValue.ParseNumber(length, 1);
                _isPercentage = true;
                return;
            }

            //If no units, has error
            if (length.Length < 3)
            {
                float.TryParse(length, out _number);
                _hasError = true;
                return;
            }

            //Get units of the length
            string u = length.Substring(length.Length - 2, 2);

            //Number of the length
            string number = length.Substring(0, length.Length - 2);

            //TODO: Units behave different in paper and in screen!
            switch (u)
            {
            case CssConstants.Em:
                _unit       = CssUnit.Ems;
                _isRelative = true;
                break;

            case CssConstants.Ex:
                _unit       = CssUnit.Ex;
                _isRelative = true;
                break;

            case CssConstants.Px:
                _unit       = CssUnit.Pixels;
                _isRelative = true;
                break;

            case CssConstants.Mm:
                _unit = CssUnit.Milimeters;
                break;

            case CssConstants.Cm:
                _unit = CssUnit.Centimeters;
                break;

            case CssConstants.In:
                _unit = CssUnit.Inches;
                break;

            case CssConstants.Pt:
                _unit = CssUnit.Points;
                break;

            case CssConstants.Pc:
                _unit = CssUnit.Picas;
                break;

            default:
                _hasError = true;
                return;
            }

            if (!float.TryParse(number, System.Globalization.NumberStyles.Number, NumberFormatInfo.InvariantInfo, out _number))
            {
                _hasError = true;
            }
        }