VAR/VAR.PdfTools
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PdfTextExtractor: Group PdfTextElement when there is no position change

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This commit is contained in:
Valeriano A.R.
2016-06-24 15:36:00 +02:00
parent ed03166f6f
commit da908d0f36
1 changed files with 62 additions and 9 deletions
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71
VAR.PdfTools/PdfTextExtractor.cs
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@@ -139,6 +139,9 @@ namespace VAR.PdfTools
public double VisibleHeight { get; set; }
private List<PdfTextElement> _childs = new List<PdfTextElement>();
public List<PdfTextElement> Childs { get { return _childs; } }
#endregion
#region Public methods
@@ -179,6 +182,8 @@ namespace VAR.PdfTools
private StringBuilder _sbText = new StringBuilder();
private double _textWidth = 0;
PdfTextElement _currentTextElement = null;
#endregion
#region Properties
@@ -216,13 +221,8 @@ namespace VAR.PdfTools
return sbText.ToString();
}
private void FlushTextElement()
private PdfTextElement BuildTextElement()
{
if (_sbText.Length == 0)
{
return;
}
PdfTextElement textElem = new PdfTextElement();
textElem.Font = _font;
textElem.FontSize = _fontSize;
@@ -231,7 +231,60 @@ namespace VAR.PdfTools
textElem.VisibleText = PdfString_ToUnicode(textElem.RawText, _font);
textElem.VisibleWidth = _textWidth * textElem.Matrix.Matrix[0, 0];
textElem.VisibleHeight = (_font.Height * _fontSize) * textElem.Matrix.Matrix[1, 1];
_textElements.Add(textElem);
return textElem;
}
private void FlushTextElementSoft()
{
if (_sbText.Length == 0)
{
return;
}
PdfTextElement textElem = BuildTextElement();
if (_currentTextElement == null)
{
_currentTextElement = new PdfTextElement();
_currentTextElement.Font = null;
_currentTextElement.FontSize = -1;
_currentTextElement.Matrix = textElem.Matrix.Copy();
_currentTextElement.RawText = string.Empty;
_currentTextElement.VisibleText = string.Empty;
_currentTextElement.VisibleWidth = 0;
_currentTextElement.VisibleHeight = 0;
}
_currentTextElement.VisibleText += textElem.VisibleText;
_currentTextElement.VisibleWidth += textElem.VisibleWidth;
_currentTextElement.VisibleHeight = System.Math.Max(_currentTextElement.VisibleHeight, textElem.VisibleHeight);
_currentTextElement.Childs.Add(textElem);
_sbText = new StringBuilder();
_textWidth = 0;
}
private void FlushTextElement()
{
if (_sbText.Length == 0)
{
if (_currentTextElement != null)
{
_textElements.Add(_currentTextElement);
_currentTextElement = null;
}
return;
}
if (_currentTextElement != null)
{
FlushTextElementSoft();
_textElements.Add(_currentTextElement);
_currentTextElement = null;
}
else
{
PdfTextElement textElem = BuildTextElement();
_textElements.Add(textElem);
}
_sbText = new StringBuilder();
_textWidth = 0;
@@ -305,13 +358,13 @@ namespace VAR.PdfTools
private void OpEndText()
{
FlushTextElement();
FlushTextElementSoft();
inText = false;
}
private void OpTextFont(string fontName, double size)
{
FlushTextElement();
FlushTextElementSoft();
_font = _page.Fonts[fontName];
_fontSize = size;
}