public TextInfo(string text, TextStyle style = null)
{
Text = text;
Styles = new TextStyle(style);
}
/// <summary>
/// Attach content to end of this paragraph by same styles
/// </summary>
/// <param name="contentOffset">The offset of attached content inflowing of this paragraph</param>
/// <param name="content">Text of content which is want to attached at this paragraph</param>
/// <param name="contentStyle">The given styles will be applied on the all of given content</param>
public void AddContent(int contentOffset, string content, TextStyle contentStyle)
{
var wordBuffer = "";
var offset = contentOffset;
for (var i = 0; i < content.Length; i++)
{
var charPointer = content[i];
// is current char a space char?
if (charPointer == ' ')
{
if (wordBuffer.Length > 0)
{
AddWord(new WordInfo(wordBuffer, offset, WordType.Normal, contentStyle))
.Styles.SetDirection(IsRtl(wordBuffer));
}
wordBuffer = "";
// add space char as word
// note: space.IsRtl will complete calculate after adding all words
var spaceIsRtl = Styles.IsRtl == Words.LastOrDefault()?.Styles.IsRtl;
AddWord(new SpaceWord(contentOffset + i, contentStyle))
.Styles.SetDirection(spaceIsRtl);
// maybe there are exist multiple sequence space, so we set offset outside of the keeping word buffer.
offset = contentOffset + i + 1; // set next word offset
continue;
}
// is current char a inert char?
if (InertChars.Contains(charPointer))
{
if (wordBuffer.Length > 0)
{
AddWord(new WordInfo(wordBuffer, offset, WordType.Normal | WordType.Attached, contentStyle))
.Styles.SetDirection(IsRtl(wordBuffer));
}
wordBuffer = "";
// add inert char as word
var isInnerWord = i + 1 < content.Length && content[i + 1] != ' ';
var inertIsRtl = IsRtl(charPointer) || Styles.IsRtl == Words.LastOrDefault()?.Styles.IsRtl;
AddWord(new WordInfo(charPointer.ToString(), contentOffset + i,
isInnerWord ? WordType.Attached | WordType.InertChar : WordType.InertChar, contentStyle))
.Styles.SetDirection(inertIsRtl);
offset = contentOffset + i + 1; // set next word offset
continue;
}
//
// keep letter or digit in buffer
wordBuffer += charPointer;
}
//
// keep last word from buffer
if (wordBuffer.Length > 0)
{
AddWord(new WordInfo(wordBuffer, offset, WordType.Normal, contentStyle))
.Styles.SetDirection(IsRtl(wordBuffer));
}
}