private void PositionWordsHorizontally(float maxWidth, out float longestLineWidth)
{
fittedWords.Clear();
fittedWords.AddRange(words);
longestLineWidth = 0;
float x = 0;
// We're using breakStart to join multiple words into one with
int breakStart = 0;
for (int i = 0; i < fittedWords.Count; i++)
{
var word = fittedWords[i].Clone();
word.LineBreak = word.ForceLineBreak;
if (word.LineBreak)
{
x = 0;
}
if (i > 0 && !fittedWords[i - 1].IsNbsp && !word.IsNbsp)
{
breakStart = i;
}
word.Width = CalcWordWidth(word);
var t = texts[word.TextIndex];
var isTextOrBullet = (t.Length > 0 && t[word.Start] > ' ') || IsBullet(word);
if (x + word.Width > maxWidth && isTextOrBullet)
{
if (wordSplitAllowed || t.HasJapaneseChineseSymbols(word.Start, word.Length))
{
var fittedCharsCount = CalcFittedCharactersCount(word, maxWidth - x);
if (fittedCharsCount > 0)
{
var wordEnd = word.Start + fittedCharsCount;
TextLineSplitter.AdjustLineBreakPosition(t, ref wordEnd, word.Start + word.Length - 1);
if (wordEnd > word.Start)
{
fittedCharsCount = wordEnd - word.Start;
}
var newWord = word.Clone();
newWord.IsTagBegin = false;
newWord.Start = word.Start + fittedCharsCount;
newWord.Length = word.Length - fittedCharsCount;
newWord.Width = CalcWordWidth(newWord);
newWord.ForceLineBreak = true;
word.Length = fittedCharsCount;
word.Width = CalcWordWidth(word);
word.X = x;
fittedWords.Insert(i + 1, newWord);
goto skip_default_placement;
}
}
// Splitting by words
var isWordContinue =
breakStart < i ||
word.TextIndex > 0 &&
word.Start == 0 &&
t.Length > 0 &&
t[word.Start] > ' ' &&
(GetLastChar(texts[fittedWords[i - 1].TextIndex]) > ' ' || IsBullet(fittedWords[i - 1]));
if (isWordContinue)
{
breakStart = Math.Min(breakStart, i - 1);
fittedWords[breakStart].LineBreak = true;
x = 0;
Word prev = null;
// It's required to save our cloned word
fittedWords[i] = word;
for (var j = breakStart; j <= i; j++)
{
prev = fittedWords[j];
prev.X = x;
x += prev.Width;
}
word = prev ?? word;
}
else
{
word.X = 0;
word.LineBreak = true;
word.Width = CalcWordWidth(word);
x = word.Width;
}
}
else
{
word.X = x;
x += word.Width;
}
skip_default_placement:
if (overflowMode == TextOverflowMode.Ellipsis)
{
if (word.X == 0 && word.Width > maxWidth)
{
ClipWordWithEllipsis(word, maxWidth);
}
}
if (isTextOrBullet) // buz: при автопереносе на концах строк остаются пробелы, они не должны влиять на значение длины строки
{
longestLineWidth = Math.Max(longestLineWidth, word.X + word.Width);
}
fittedWords[i] = word;
}
}
Test_TextLineSplitter()
{
Print( "Pull" );
Assert(
"\nline1\nline2\rline3\r\nline4\r\rline6\n\nline8\nline9"
.AsStream()
.To( new TextLineSplitter() )
.SequenceEqual(
Stream.Create(
"", "line1", "line2", "line3", "line4", "", "line6", "",
"line8", "line9" ) ) );
Print( "Push" );
var lines = new List< string >();
var sink =
new TextLineSplitter()
.To( lines.AsSink() );
"\nline1\nline2\rline3\r\nline4\r\rline6\n\nline8\nline9"
.AsStream()
.EmptyTo( sink );
sink.Dispose();
Assert(
lines
.AsStream()
.SequenceEqual(
Stream.Create(
"", "line1", "line2", "line3", "line4", "", "line6", "",
"line8", "line9" ) ) );
}
