private bool LoadPage(int pageNo)
{
if (_pdfDocumentModel == null)
{
return(false);
}
_pdfPageModel = _pdfDocumentModel.GetPage(pageNo);
if (_pdfPageModel == null)
{
return(false);
}
// set remove duplicate letters
_pdfPageModel.SetRemoveDuplicateLetters(_removeDuplicateLetters);
// set word extractor
_pdfPageModel.SetWordExtractor(WordExtractor);
// set page segmenter
_pdfPageModel.SetPageSegmenter(PageSegmenter);
var pageInfoModel = _pdfPageModel.GetPageInfo();
// Plot height distrib
HeightHistoPlotModel = pageInfoModel.HeightDistribution?.GetPlotModel("Letters height distribution");
WidthHistoPlotModel = pageInfoModel.WidthDistribution?.GetPlotModel("Letters width distribution");
// Plot page
var pagePlotModel = new PlotModel {
IsLegendVisible = false
};
pagePlotModel.Axes.Add(new LinearAxis {
Position = AxisPosition.Left, Minimum = 0, Maximum = _pdfPageModel.Height
});
pagePlotModel.Axes.Add(new LinearAxis {
Position = AxisPosition.Bottom, Minimum = 0, Maximum = _pdfPageModel.Width
});
// Add background image
try
{
using (var stream = _pdfImageConverter.GetPageStream(pageNo, 2))
{
PageImage = new OxyImage(stream);
}
pagePlotModel.Annotations.Add(new ImageAnnotation
{
ImageSource = PageImage,
Opacity = 0.5,
X = new PlotLength(_pdfPageModel.CropBox.Bounds.BottomLeft.X, PlotLengthUnit.Data),
Y = new PlotLength(_pdfPageModel.CropBox.Bounds.BottomLeft.Y, PlotLengthUnit.Data),
Width = new PlotLength(_pdfPageModel.CropBox.Bounds.Width, PlotLengthUnit.Data),
Height = new PlotLength(_pdfPageModel.CropBox.Bounds.Height, PlotLengthUnit.Data),
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Bottom
});
}
catch (Exception)
{
throw;
}
this.PagePlotModel = pagePlotModel;
if (IsDisplayLetters)
{
DisplayLetters();
}
if (IsDisplayWords)
{
DisplayWords();
}
if (IsDisplayTextLines)
{
DisplayTextLines();
}
if (IsDisplayTextBlocks)
{
DisplayTextBlocks();
}
if (IsDisplayPaths)
{
DisplayPaths();
}
if (IsDisplayImages)
{
DisplayImages();
}
return(true);
}
private void DisplayPage(int pageNo)
{
if (_pdfDocumentModel == null)
{
return;
}
var page = _pdfDocumentModel.GetPage(pageNo);
// Create the plot model
var tmp = new PlotModel {
IsLegendVisible = false
};
tmp.Axes.Add(new LinearAxis {
Position = AxisPosition.Left, Minimum = 0, Maximum = page.Height
});
tmp.Axes.Add(new LinearAxis {
Position = AxisPosition.Bottom, Minimum = 0, Maximum = page.Width
});
switch (BboxLevel)
{
case "Words":
foreach (var word in page.GetWords())
{
var series1 = new LineSeries {
Title = GetShorterText(word.Text), LineStyle = LineStyle.Solid, Color = OxyColors.Red
};
var bbox = word.BoundingBox;
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.BottomLeft));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.BottomRight));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.TopRight));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.TopLeft));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.BottomLeft));
tmp.Series.Add(series1);
}
break;
case "Lines":
foreach (var line in page.GetTextBlocks().SelectMany(b => b.TextLines))
{
var series1 = new LineSeries {
Title = GetShorterText(line.Text), LineStyle = LineStyle.Solid, Color = OxyColors.Red
};
var bbox = line.BoundingBox;
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.BottomLeft));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.BottomRight));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.TopRight));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.TopLeft));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.BottomLeft));
tmp.Series.Add(series1);
}
break;
case "Paragraphs":
foreach (var block in page.GetTextBlocks())
{
var series1 = new LineSeries {
Title = GetShorterText(block.Text), LineStyle = LineStyle.Solid, Color = OxyColors.Red
};
var bbox = block.BoundingBox;
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.BottomLeft));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.BottomRight));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.TopRight));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.TopLeft));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.BottomLeft));
tmp.Series.Add(series1);
}
break;
default:
foreach (var letter in page.GetLetters())
{
var series1 = new LineSeries {
Title = letter.Value, LineStyle = LineStyle.Solid, Color = OxyColors.Red
};
var bbox = letter.GlyphRectangle;
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.BottomLeft));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.BottomRight));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.TopRight));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.TopLeft));
series1.Points.Add(PdfDocumentModel.ToDataPoint(bbox.BottomLeft));
tmp.Series.Add(series1);
}
break;
}
// Add background image
try
{
using (var stream = _pdfImageConverter.GetPageStream(pageNo, 2))
{
Image = new OxyImage(stream);
}
tmp.Annotations.Add(new ImageAnnotation
{
ImageSource = Image,
Opacity = 0.5,
X = new PlotLength(0, PlotLengthUnit.Data),
Y = new PlotLength(0, PlotLengthUnit.Data),
Width = new PlotLength(page.Width, PlotLengthUnit.Data),
Height = new PlotLength(page.Height, PlotLengthUnit.Data),
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Bottom
});
}
catch (Exception)
{
throw;
}
this.PlotModel = tmp;
}