private static bool TrySplitLine(string line, bool isWordSplitAllowed, MeasureTextLineWidthDelegate measureHandler, out string lineWithoutLastWord, out string lastWord)
{
return
(TryCutLastWord(line, out lineWithoutLastWord, out lastWord) ||
(
(isWordSplitAllowed || line.HasJapaneseChineseSymbols()) &&
TryCutWordTail(line, measureHandler, out lineWithoutLastWord, out lastWord)
));
}
private static bool TryCutWordTail(string textLine, MeasureTextLineWidthDelegate measureHandler, out string currentLinePart, out string nextLinePart)
{
currentLinePart = null;
nextLinePart = null;
var cutFrom = CalcFittedCharactersCount(textLine, measureHandler);
if (cutFrom > 0)
{
AdjustLineBreakPosition(textLine, ref cutFrom);
nextLinePart = textLine.Substring(cutFrom);
currentLinePart = textLine.Substring(0, cutFrom);
return(true);
}
else
{
return(false);
}
}
private static int CalcFittedCharactersCount(string textLine, MeasureTextLineWidthDelegate measureHandler)
{
int min = 0;
int max = textLine.Length;
int mid = 0;
bool isLineLonger = false;
do
{
mid = min + ((max - min) / 2);
isLineLonger = !measureHandler(textLine, 0, mid);
if (isLineLonger)
{
max = mid;
}
else
{
min = mid;
}
}while (min < max && !(!isLineLonger && ((max - min) / 2) == 0));
return(mid);
}
public static bool CarryLastWordToNextLine(List <string> strings, int line, bool isWordSplitAllowed, MeasureTextLineWidthDelegate measureHandler)
{
string lastWord;
string lineWithoutLastWord;
if (TrySplitLine(strings[line], isWordSplitAllowed, measureHandler, out lineWithoutLastWord, out lastWord))
{
PushWordToLine(lastWord, strings, line + 1);
strings[line] = lineWithoutLastWord;
return(true);
}
else
{
return(false);
}
}
