private void HighlightSelectedWords(Graphics g)
{
MyWord[] words = _selectedText[_currentPageNumber];
// Highlight the selected words
using (Brush brush = new SolidBrush(Color.FromArgb(128, SystemColors.Highlight)))
{
LeadMatrix mm = _rasterImageViewer.GetImageTransformWithDpi(true);
Matrix m = new Matrix((float)mm.M11, (float)mm.M12, (float)mm.M21, (float)mm.M22, (float)mm.OffsetX, (float)mm.OffsetY);
Transformer trans = new Transformer(m);
// Clip to the current image bounds
RectangleF clipRect = new RectangleF(0, 0, _rasterImageViewer.Image.ImageWidth, _rasterImageViewer.Image.ImageHeight);
clipRect = trans.RectangleToPhysical(clipRect);
g.SetClip(clipRect);
LeadRect lineBounds = LeadRect.Empty;
foreach (MyWord word in words)
{
// Get the word boundaries
if (lineBounds.IsEmpty)
{
lineBounds = word.Bounds;
}
else
{
lineBounds = LeadRect.Union(lineBounds, word.Bounds);
}
if (word.IsEndOfLine)
{
// Highlight this line
HighlightLine(g, trans, brush, lineBounds);
lineBounds = LeadRect.Empty;
}
}
if (!lineBounds.IsEmpty)
{
HighlightLine(g, trans, brush, lineBounds);
}
}
}
public static Dictionary <int, MyWord[]> BuildWord(PDFDocument document)
{
Dictionary <int, MyWord[]> pageWords = new Dictionary <int, MyWord[]>();
for (int pageNumber = 1; pageNumber <= document.Pages.Count; pageNumber++)
{
List <MyWord> words = new List <MyWord>();
PDFDocumentPage page = document.Pages[pageNumber - 1];
IList <PDFObject> objects = page.Objects;
if (objects != null && objects.Count > 0)
{
int objectIndex = 0;
int objectCount = objects.Count;
// Loop through all the objects
while (objectIndex < objectCount)
{
// Find the total bounding rectangle, begin and end index of the next word
LeadRect wordBounds = LeadRect.Empty;
int firstObjectIndex = objectIndex;
// Loop till we reach EndOfWord or reach the end of the objects
bool more = true;
while (more)
{
PDFObject obj = objects[objectIndex];
// Must be text and not a white character
if (obj.ObjectType == PDFObjectType.Text && !Char.IsWhiteSpace(obj.Code))
{
// Add the bounding rectangle of this object
PDFRect temp = page.ConvertRect(PDFCoordinateType.Pdf, PDFCoordinateType.Pixel, obj.Bounds);
LeadRect objectBounds = LeadRect.FromLTRB((int)temp.Left, (int)temp.Top, (int)temp.Right, (int)temp.Bottom);
if (wordBounds.IsEmpty)
{
wordBounds = objectBounds;
}
else
{
wordBounds = LeadRect.Union(wordBounds, objectBounds);
}
}
else
{
firstObjectIndex = objectIndex + 1;
}
objectIndex++;
more = (objectIndex < objectCount) && !obj.TextProperties.IsEndOfWord && !obj.TextProperties.IsEndOfLine;
}
if (firstObjectIndex == objectIndex)
{
continue;
}
// From the begin and end index, collect the characters into a string
StringBuilder sb = new StringBuilder();
for (int i = firstObjectIndex; i < objectIndex; i++)
{
if (objects[i].ObjectType == PDFObjectType.Text)
{
sb.Append(objects[i].Code);
}
}
// Add this word to the list
PDFObject lastObject = objects[objectIndex - 1];
MyWord word = new MyWord();
word.Value = sb.ToString();
word.Bounds = wordBounds;
word.IsEndOfLine = lastObject.TextProperties.IsEndOfLine;
words.Add(word);
}
}
// Add "IsEndOfLine" to the last word in the page, just in case it does not have it
if (words.Count > 0)
{
MyWord word = words[words.Count - 1];
word.IsEndOfLine = true;
words[words.Count - 1] = word;
}
pageWords.Add(pageNumber, words.ToArray());
}
return(pageWords);
}