private SizeF MeasureString(string s, StyleInfo si, Graphics g, out float descent) { Font drawFont = null; StringFormat drawFormat = null; SizeF ms = SizeF.Empty; descent = 0; if (s == null || s.Length == 0) { return(ms); } try { // STYLE System.Drawing.FontStyle fs = 0; if (si.FontStyle == FontStyleEnum.Italic) { fs |= System.Drawing.FontStyle.Italic; } // WEIGHT switch (si.FontWeight) { case FontWeightEnum.Bold: case FontWeightEnum.Bolder: case FontWeightEnum.W500: case FontWeightEnum.W600: case FontWeightEnum.W700: case FontWeightEnum.W800: case FontWeightEnum.W900: fs |= System.Drawing.FontStyle.Bold; break; default: break; } try { FontFamily ff = si.GetFontFamily(); drawFont = new Font(ff, si.FontSize, fs); // following algorithm comes from the C# Font Metrics documentation float descentPixel = si.FontSize * ff.GetCellDescent(fs) / ff.GetEmHeight(fs); descent = RSize.PointsFromPixels(g, descentPixel); } catch { drawFont = new Font("Arial", si.FontSize, fs); // usually because font not found descent = 0; } drawFormat = new StringFormat(); drawFormat.Alignment = StringAlignment.Near; CharacterRange[] cr = { new CharacterRange(0, s.Length) }; drawFormat.SetMeasurableCharacterRanges(cr); Region[] rs = new Region[1]; rs = g.MeasureCharacterRanges(s, drawFont, new RectangleF(0, 0, float.MaxValue, float.MaxValue), drawFormat); RectangleF mr = rs[0].GetBounds(g); ms.Height = RSize.PointsFromPixels(g, mr.Height); // convert to points from pixels ms.Width = RSize.PointsFromPixels(g, mr.Width); // convert to points from pixels return(ms); } finally { if (drawFont != null) { drawFont.Dispose(); } if (drawFormat != null) { drawFont.Dispose(); } } }
private void DrawString(PageText pt, Graphics g, RectangleF r) { StyleInfo si = pt.SI; string s = pt.Text; Font drawFont = null; StringFormat drawFormat = null; Brush drawBrush = null; try { // STYLE System.Drawing.FontStyle fs = 0; if (si.FontStyle == FontStyleEnum.Italic) { fs |= System.Drawing.FontStyle.Italic; } switch (si.TextDecoration) { case TextDecorationEnum.Underline: fs |= System.Drawing.FontStyle.Underline; break; case TextDecorationEnum.LineThrough: fs |= System.Drawing.FontStyle.Strikeout; break; case TextDecorationEnum.Overline: case TextDecorationEnum.None: break; } // WEIGHT switch (si.FontWeight) { case FontWeightEnum.Bold: case FontWeightEnum.Bolder: case FontWeightEnum.W500: case FontWeightEnum.W600: case FontWeightEnum.W700: case FontWeightEnum.W800: case FontWeightEnum.W900: fs |= System.Drawing.FontStyle.Bold; break; default: break; } try { drawFont = new Font(si.GetFontFamily(), si.FontSize, fs); // si.FontSize already in points } catch (ArgumentException) { drawFont = new Font("Arial", si.FontSize, fs); // if this fails we'll let the error pass thru } // ALIGNMENT drawFormat = new StringFormat(); switch (si.TextAlign) { case TextAlignEnum.Right: drawFormat.Alignment = StringAlignment.Far; break; case TextAlignEnum.Center: drawFormat.Alignment = StringAlignment.Center; break; case TextAlignEnum.Left: default: drawFormat.Alignment = StringAlignment.Near; break; } if (pt.SI.WritingMode == WritingModeEnum.tb_rl) { drawFormat.FormatFlags |= StringFormatFlags.DirectionRightToLeft; drawFormat.FormatFlags |= StringFormatFlags.DirectionVertical; } switch (si.VerticalAlign) { case VerticalAlignEnum.Bottom: drawFormat.LineAlignment = StringAlignment.Far; break; case VerticalAlignEnum.Middle: drawFormat.LineAlignment = StringAlignment.Center; break; case VerticalAlignEnum.Top: default: drawFormat.LineAlignment = StringAlignment.Near; break; } // draw the background DrawBackground(g, r, si); // adjust drawing rectangle based on padding RectangleF r2 = new RectangleF(r.Left + si.PaddingLeft, r.Top + si.PaddingTop, r.Width - si.PaddingLeft - si.PaddingRight, r.Height - si.PaddingTop - si.PaddingBottom); drawBrush = new SolidBrush(si.Color); if (pt.NoClip) // request not to clip text { g.DrawString(pt.Text, drawFont, drawBrush, new PointF(r.Left, r.Top), drawFormat); //HighlightString(g, pt, new RectangleF(r.Left, r.Top, float.MaxValue, float.MaxValue),drawFont, drawFormat); } else { g.DrawString(pt.Text, drawFont, drawBrush, r2, drawFormat); //HighlightString(g, pt, r2, drawFont, drawFormat); } } finally { if (drawFont != null) { drawFont.Dispose(); } if (drawFormat != null) { drawFont.Dispose(); } if (drawBrush != null) { drawBrush.Dispose(); } } }
public static string[] MeasureString(PageText pt, Graphics g, out float[] width) { StyleInfo si = pt.SI; string s = pt.Text; System.Drawing.Font drawFont = null; StringFormat drawFormat = null; SizeF ms; string[] sa = null; width = null; try { // STYLE System.Drawing.FontStyle fs = 0; if (si.FontStyle == FontStyleEnum.Italic) { fs |= System.Drawing.FontStyle.Italic; } // WEIGHT switch (si.FontWeight) { case FontWeightEnum.Bold: case FontWeightEnum.Bolder: case FontWeightEnum.W500: case FontWeightEnum.W600: case FontWeightEnum.W700: case FontWeightEnum.W800: case FontWeightEnum.W900: fs |= System.Drawing.FontStyle.Bold; break; default: break; } drawFont = new System.Drawing.Font(StyleInfo.GetFontFamily(si.FontFamilyFull), si.FontSize, fs); drawFormat = new StringFormat(); drawFormat.Alignment = StringAlignment.Near; // Measure string // pt.NoClip indicates that this was generated by PageTextHtml Build. It has already word wrapped. if (pt.NoClip || pt.SI.WritingMode == WritingModeEnum.tb_rl) // TODO: support multiple lines for vertical text { ms = MeasureString(s, g, drawFont, drawFormat); width = new float[1]; width[0] = RSize.PointsFromPixels(g, ms.Width); // convert to points from pixels sa = new string[1]; sa[0] = s; return(sa); } // handle multiple lines; // 1) split the string into the forced line breaks (ie "\n and \r") // 2) foreach of the forced line breaks; break these into words and recombine s = s.Replace("\r\n", "\n"); // don't want this to result in double lines string[] flines = s.Split(lineBreak); List <string> lines = new List <string>(); List <float> lineWidths = new List <float>(); // remove the size reserved for left and right padding float ptWidth = pt.W - pt.SI.PaddingLeft - pt.SI.PaddingRight; if (ptWidth <= 0) { ptWidth = 1; } foreach (string tfl in flines) { string fl; if (tfl.Length > 0 && tfl[tfl.Length - 1] == ' ') { fl = tfl.TrimEnd(' '); } else { fl = tfl; } // Check if entire string fits into a line ms = MeasureString(fl, g, drawFont, drawFormat); float tw = RSize.PointsFromPixels(g, ms.Width); if (tw <= ptWidth) { // line fits don't need to break it down further lines.Add(fl); lineWidths.Add(tw); continue; } // Line too long; need to break into multiple lines // 1) break line into parts; then build up again keeping track of word positions string[] parts = fl.Split(wordBreak); // this is the maximum split of lines StringBuilder sb = new StringBuilder(fl.Length); CharacterRange[] cra = new CharacterRange[parts.Length]; for (int i = 0; i < parts.Length; i++) { int sc = sb.Length; // starting character sb.Append(parts[i]); // endding character if (i != parts.Length - 1) // last item doesn't need blank { sb.Append(" "); } int ec = sb.Length; CharacterRange cr = new CharacterRange(sc, ec - sc); cra[i] = cr; // add to character array } // 2) Measure the word locations within the line string wfl = sb.ToString(); WordStartFinish[] wordLocations = MeasureString(wfl, g, drawFont, drawFormat, cra); if (wordLocations == null) { continue; } // 3) Loop thru creating new lines as needed int startLoc = 0; CharacterRange crs = cra[startLoc]; CharacterRange cre = cra[startLoc]; float cwidth = wordLocations[0].end; // length of the first float bwidth = wordLocations[0].start; // characters need a little extra on start string ts; bool bLine = true; for (int i = 1; i < cra.Length; i++) { cwidth = wordLocations[i].end - wordLocations[startLoc].start + bwidth; if (cwidth > ptWidth) { // time for a new line cre = cra[i - 1]; ts = wfl.Substring(crs.First, cre.First + cre.Length - crs.First); lines.Add(ts); lineWidths.Add(wordLocations[i - 1].end - wordLocations[startLoc].start + bwidth); // Find the first non-blank character of the next line while (i < cra.Length && cra[i].Length == 1 && fl[cra[i].First] == ' ') { i++; } if (i < cra.Length) // any lines left? { // yes, continue on startLoc = i; crs = cre = cra[startLoc]; cwidth = wordLocations[i].end - wordLocations[startLoc].start + bwidth; } else // no, we can stop { bLine = false; } // bwidth = wordLocations[startLoc].start - wordLocations[startLoc - 1].end; } else { cre = cra[i]; } } if (bLine) { ts = fl.Substring(crs.First, cre.First + cre.Length - crs.First); lines.Add(ts); lineWidths.Add(cwidth); } } // create the final array from the Lists string[] la = lines.ToArray(); width = lineWidths.ToArray(); return(la); } finally { if (drawFont != null) { drawFont.Dispose(); } if (drawFormat != null) { drawFont.Dispose(); } } }
private SizeF MeasureString(string s, StyleInfo si, Graphics g, out float descent) { Font drawFont=null; StringFormat drawFormat=null; SizeF ms = SizeF.Empty; descent = 0; if (s == null || s.Length == 0) return ms; try { // STYLE System.Drawing.FontStyle fs = 0; if (si.FontStyle == FontStyleEnum.Italic) fs |= System.Drawing.FontStyle.Italic; // WEIGHT switch (si.FontWeight) { case FontWeightEnum.Bold: case FontWeightEnum.Bolder: case FontWeightEnum.W500: case FontWeightEnum.W600: case FontWeightEnum.W700: case FontWeightEnum.W800: case FontWeightEnum.W900: fs |= System.Drawing.FontStyle.Bold; break; default: break; } try { FontFamily ff = si.GetFontFamily(); drawFont = new Font(ff, si.FontSize, fs); // following algorithm comes from the C# Font Metrics documentation float descentPixel = si.FontSize * ff.GetCellDescent(fs) / ff.GetEmHeight(fs); descent = RSize.PointsFromPixels(g, descentPixel); } catch { drawFont = new Font("Arial", si.FontSize, fs); // usually because font not found descent = 0; } drawFormat = new StringFormat(); drawFormat.Alignment = StringAlignment.Near; CharacterRange[] cr = {new CharacterRange(0, s.Length)}; drawFormat.SetMeasurableCharacterRanges(cr); Region[] rs = new Region[1]; rs = g.MeasureCharacterRanges(s, drawFont, new RectangleF(0,0,float.MaxValue,float.MaxValue), drawFormat); RectangleF mr = rs[0].GetBounds(g); ms.Height = RSize.PointsFromPixels(g, mr.Height); // convert to points from pixels ms.Width = RSize.PointsFromPixels(g, mr.Width); // convert to points from pixels return ms; } finally { if (drawFont != null) drawFont.Dispose(); if (drawFormat != null) drawFont.Dispose(); } }