Represents information about highlighted text in the control
Exemple #1
0
		/// <summary>
		/// Highlight text on the page
		/// </summary>
		/// <param name="pageIndex">Zero-based index of the page</param>
		/// <param name="charIndex">Zero-based char index on the page.</param>
		/// <param name="charsCount">The number of highlighted characters on the page or -1 for highlight text from charIndex to end of the page.</param>
		/// <param name="color">Highlight color</param>
		public void HighlightText(int pageIndex, int charIndex, int charsCount, Color color)
		{
			//normalize all user input
			if (pageIndex < 0)
				pageIndex = 0;
			if (pageIndex > Document.Pages.Count - 1)
				pageIndex = Document.Pages.Count - 1;

			int charsCnt = Document.Pages[pageIndex].Text.CountChars;
			if (charIndex < 0)
				charIndex = 0;
			if (charIndex > charsCnt - 1)
				charIndex = charsCnt - 1;
			if (charsCount < 0)
				charsCount = charsCnt - charIndex;
			if (charIndex + charsCount > charsCnt)
				charsCount = charsCnt - 1 - charIndex;
			if (charsCount <= 0)
				return;

			var newEntry = new HighlightInfo() { CharIndex = charIndex, CharsCount = charsCount, Color = color };

			if (!_highlightedText.ContainsKey(pageIndex))
			{
				if (color != Helpers.ColorEmpty)
				{
					_highlightedText.Add(pageIndex, new List<HighlightInfo>());
					_highlightedText[pageIndex].Add(newEntry);
				}
			}
			else
			{
				var entries = _highlightedText[pageIndex];
				//Analize exists entries and remove overlapped and trancate intersecting entries
				for (int i = entries.Count - 1; i >= 0; i--)
				{
					List<HighlightInfo> calcEntries;
					if (CalcIntersectEntries(entries[i], newEntry, out calcEntries))
					{
						if (calcEntries.Count == 0)
							entries.RemoveAt(i);
						else
							for (int j = 0; j < calcEntries.Count; j++)
								if (j == 0)
									entries[i] = calcEntries[j];
								else
									entries.Insert(i, calcEntries[j]);
					}
				}
				if (color != Helpers.ColorEmpty)
					entries.Add(newEntry);
			}

			InvalidateVisual();
			OnHighlightedTextChanged(EventArgs.Empty);
		}
Exemple #2
0
		private bool CalcIntersectEntries(HighlightInfo existEntry, HighlightInfo addingEntry, out List<HighlightInfo> calcEntries)
		{
			calcEntries = new List<HighlightInfo>();
			int eStart = existEntry.CharIndex;
			int eEnd = existEntry.CharIndex + existEntry.CharsCount - 1;
			int aStart = addingEntry.CharIndex;
			int aEnd = addingEntry.CharIndex + addingEntry.CharsCount - 1;

			if (eStart < aStart && eEnd >= aStart && eEnd <= aEnd)
			{
				calcEntries.Add(new HighlightInfo()
				{
					CharIndex = eStart,
					CharsCount = aStart - eStart,
					Color = existEntry.Color
				});
				return true;
			}
			else if (eStart >= aStart && eStart <= aEnd && eEnd > aEnd)
			{
				calcEntries.Add(new HighlightInfo()
				{
					CharIndex = aEnd + 1,
					CharsCount = eEnd - aEnd,
					Color = existEntry.Color
				});
				return true;
			}
			else if (eStart >= aStart && eEnd <= aEnd)
				return true;
			else if (eStart < aStart && eEnd > aEnd)
			{
				calcEntries.Add(new HighlightInfo()
				{
					CharIndex = eStart,
					CharsCount = aStart - eStart,
					Color = existEntry.Color
				});
				calcEntries.Add(new HighlightInfo()
				{
					CharIndex = aEnd + 1,
					CharsCount = eEnd - aEnd,
					Color = existEntry.Color
				});
				return true;
			}
			//no intersection
			return false;
		}
Exemple #3
0
		/// <summary>
		/// Highlight text on the page
		/// </summary>
		/// <param name="pageIndex">Zero-based index of the page</param>
		/// <param name="highlightInfo">Sets the options for highlighting text</param>
		public void HighlightText(int pageIndex, HighlightInfo highlightInfo)
		{
			HighlightText(pageIndex, highlightInfo.CharIndex, highlightInfo.CharsCount, highlightInfo.Color);
		}