protected IEnumerable<Tuple<string, bool, Func<FrameworkElement>, bool>> CheckLengths(ITextRenderAttributeState attributes, IEnumerable<string> words)
{
var wordsArr = GetRoughLengths(attributes, words).ToArray();
int idx0 = 0;
string current = "";
double len = 0;
for (int i = 0; i < wordsArr.Length; i++)
{
var word = wordsArr[i];
current += word.Item1;
len = word.Item2;
if ((len + LineWidth) > TextCanvas.ActualWidth)
{
idx0 = i;
break;
}
}
int idx1 = -1;
for (int j = idx0; j >= 0; j--)
{
current = "";
for (int i = 0; i <= j; i++)
{
var word = wordsArr[i].Item1;
current += word;
}
var com = new TextRenderCommand(attributes, new TextRenderTextContent(current));
var key = GetElementKey(com);
var elWidth = GetElementWidth(key, com);
if (!((elWidth + LineWidth) > TextCanvas.ActualWidth))
{
idx1 = j;
break;
}
}
bool exceeded = false;
current = "";
for (int i = 0; i < wordsArr.Length; i++)
{
var word = wordsArr[i].Item1;
current += word;
if (exceeded)
{
yield return new Tuple<string, bool, Func<FrameworkElement>, bool>(word, false, () => null, true);
}
else
{
var com = new TextRenderCommand(attributes, new TextRenderTextContent(current));
var key = GetElementKey(com);
if (i > idx1)
{
var elWidth = GetElementWidth(key, com);
if ((elWidth + LineWidth) > TextCanvas.ActualWidth)
{
exceeded = true;
}
yield return new Tuple<string, bool, Func<FrameworkElement>, bool>(word, !exceeded, ExtractElement(key, com), false);
}
else
{
yield return new Tuple<string, bool, Func<FrameworkElement>, bool>(word, true, ExtractElement(key, com), false);
}
}
}
}
protected IEnumerable<Tuple<string, bool, Action, bool>> CheckLengths(ITextRenderAttributeState attributes, IEnumerable<string> words)
{
var wordsArr = words.ToArray();
var testCom = new TextRenderCommand(attributes, new TextRenderTextContent("a"));
var charWidth = GetElementWidth(testCom);
int idx0 = 0;
string current = "";
for (int i = 0; i < wordsArr.Length; i++)
{
var word = wordsArr[i];
current += word;
var len = current.Length * charWidth;
if ((len + LineWidth) > RenderWidth)
{
idx0 = i;
break;
}
}
int idx1 = -1;
for (int j = idx0; j >= 0; j--)
{
current = "";
for (int i = 0; i <= j; i++)
{
var word = wordsArr[i];
current += word;
}
var com = new TextRenderCommand(attributes, new TextRenderTextContent(current));
var elWidth = GetElementWidth(com);
if (!((elWidth + LineWidth) > RenderWidth))
{
idx1 = j;
break;
}
}
bool exceeded = false;
current = "";
for (int i = 0; i < wordsArr.Length; i++)
{
var word = wordsArr[i];
current += word;
if (exceeded)
{
yield return new Tuple<string, bool, Action, bool>(word, false, null, true);
}
else
{
var com = new TextRenderCommand(attributes, new TextRenderTextContent(current));
if (i > idx1)
{
var elWidth = GetElementWidth(com);
if ((elWidth + LineWidth) > RenderWidth)
{
exceeded = true;
}
yield return new Tuple<string, bool, Action, bool>(word, !exceeded, () => AddElementToCanvas(com), false);
}
else
{
yield return new Tuple<string, bool, Action, bool>(word, true, () => AddElementToCanvas(com), false);
}
}
}
}
protected IEnumerable<Tuple<string, double>> GetRoughLengths(ITextRenderAttributeState attributes, IEnumerable<string> words)
{
var wordsArr = words.ToArray();
var agg = wordsArr.Aggregate(new StringBuilder(), (sb, s) => sb.Append(s)).ToString();
var aggCom = new TextRenderCommand(attributes, new TextRenderTextContent(agg));
var aggKey = GetElementKey(aggCom);
var totalWidth = GetElementWidth(aggKey, aggCom);
var totalCount = agg.Length > 0 ? agg.Length : 1;
int cnt = 0;
foreach (var word in wordsArr)
{
cnt += word.Length;
yield return new Tuple<string, double>(word, totalWidth * cnt / totalCount);
}
}