/// <summary>Draw a block of text to the screen with the specified wrap width.</summary>
/// <param name="batch">The sprite batch.</param>
/// <param name="font">The sprite font.</param>
/// <param name="text">The block of text to write.</param>
/// <param name="position">The position at which to draw the text.</param>
/// <param name="wrapWidth">The width at which to wrap the text.</param>
/// <param name="scale">The font scale.</param>
/// <returns>Returns the text dimensions.</returns>
public static Vector2 DrawTextBlock(this SpriteBatch batch, SpriteFont font, IEnumerable <IFormattedText> text, Vector2 position, float wrapWidth, float scale = 1)
{
if (text == null)
{
return(new Vector2(0, 0));
}
// track draw values
float xOffset = 0;
float yOffset = 0;
float lineHeight = font.MeasureString("ABC").Y *scale;
float spaceWidth = DrawHelper.GetSpaceWidth(font) * scale;
float blockWidth = 0;
float blockHeight = lineHeight;
// draw text snippets
foreach (IFormattedText snippet in text)
{
if (snippet?.Text == null)
{
continue;
}
// get word list
List <string> words = new List <string>();
foreach (string word in snippet.Text.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries))
{
// split on newlines
string wordPart = word;
int newlineIndex;
while ((newlineIndex = wordPart.IndexOf(Environment.NewLine, StringComparison.InvariantCulture)) >= 0)
{
if (newlineIndex == 0)
{
words.Add(Environment.NewLine);
wordPart = wordPart.Substring(Environment.NewLine.Length);
}
else if (newlineIndex > 0)
{
words.Add(wordPart.Substring(0, newlineIndex));
words.Add(Environment.NewLine);
wordPart = wordPart.Substring(newlineIndex + Environment.NewLine.Length);
}
}
// add remaining word (after newline split)
if (wordPart.Length > 0)
{
words.Add(wordPart);
}
}
// draw words to screen
foreach (string word in words)
{
// check wrap width
float wordWidth = font.MeasureString(word).X *scale;
if (word == Environment.NewLine || ((wordWidth + xOffset) > wrapWidth && (int)xOffset != 0))
{
xOffset = 0;
yOffset += lineHeight;
blockHeight += lineHeight;
}
if (word == Environment.NewLine)
{
continue;
}
// draw text
Vector2 wordPosition = new Vector2(position.X + xOffset, position.Y + yOffset);
if (snippet.Bold)
{
Utility.drawBoldText(batch, word, font, wordPosition, snippet.Color ?? Color.Black, scale);
}
else
{
batch.DrawString(font, word, wordPosition, snippet.Color ?? Color.Black, 0, Vector2.Zero, scale, SpriteEffects.None, 1);
}
// update draw values
if (xOffset + wordWidth > blockWidth)
{
blockWidth = xOffset + wordWidth;
}
xOffset += wordWidth + spaceWidth;
}
}
// return text position & dimensions
return(new Vector2(blockWidth, blockHeight));
}
/// <summary>Draw a block of text to the screen with the specified wrap width.</summary>
/// <param name="batch">The sprite batch.</param>
/// <param name="font">The sprite font.</param>
/// <param name="text">The block of text to write.</param>
/// <param name="position">The position at which to draw the text.</param>
/// <param name="wrapWidth">The width at which to wrap the text.</param>
/// <param name="scale">The font scale.</param>
/// <returns>Returns the text dimensions.</returns>
public static Vector2 DrawTextBlock(this SpriteBatch batch, SpriteFont font, IEnumerable <IFormattedText?>?text, Vector2 position, float wrapWidth, float scale = 1)
{
if (text == null)
{
return(new Vector2(0, 0));
}
// track draw values
float xOffset = 0;
float yOffset = 0;
float lineHeight = font.MeasureString("ABC").Y *scale;
float spaceWidth = DrawHelper.GetSpaceWidth(font) * scale;
float blockWidth = 0;
float blockHeight = lineHeight;
// draw text snippets
foreach (IFormattedText?snippet in text)
{
if (snippet?.Text == null)
{
continue;
}
// track surrounding spaces for combined translations
bool startSpace = snippet.Text.StartsWith(" ");
bool endSpace = snippet.Text.EndsWith(" ");
// get word list
IList <string> words = new List <string>();
string[] rawWords = snippet.Text.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0, last = rawWords.Length - 1; i <= last; i++)
{
// get word
string word = rawWords[i];
if (startSpace && i == 0)
{
word = $" {word}";
}
if (endSpace && i == last)
{
word += " ";
}
// split on newlines
string wordPart = word;
int newlineIndex;
while ((newlineIndex = wordPart.IndexOf(Environment.NewLine, StringComparison.Ordinal)) >= 0)
{
if (newlineIndex == 0)
{
words.Add(Environment.NewLine);
wordPart = wordPart.Substring(Environment.NewLine.Length);
}
else if (newlineIndex > 0)
{
words.Add(wordPart.Substring(0, newlineIndex));
words.Add(Environment.NewLine);
wordPart = wordPart.Substring(newlineIndex + Environment.NewLine.Length);
}
}
// add remaining word (after newline split)
if (wordPart.Length > 0)
{
words.Add(wordPart);
}
}
// draw words to screen
bool isFirstOfLine = true;
foreach (string word in words)
{
// check wrap width
float wordWidth = font.MeasureString(word).X *scale;
float prependSpace = isFirstOfLine ? 0 : spaceWidth;
if (word == Environment.NewLine || ((wordWidth + xOffset + prependSpace) > wrapWidth && (int)xOffset != 0))
{
xOffset = 0;
yOffset += lineHeight;
blockHeight += lineHeight;
isFirstOfLine = true;
}
if (word == Environment.NewLine)
{
continue;
}
// draw text
Vector2 wordPosition = new Vector2(position.X + xOffset + prependSpace, position.Y + yOffset);
if (snippet.Bold)
{
Utility.drawBoldText(batch, word, font, wordPosition, snippet.Color ?? Color.Black, scale);
}
else
{
batch.DrawString(font, word, wordPosition, snippet.Color ?? Color.Black, 0, Vector2.Zero, scale, SpriteEffects.None, 1);
}
// update draw values
if (xOffset + wordWidth + prependSpace > blockWidth)
{
blockWidth = xOffset + wordWidth + prependSpace;
}
xOffset += wordWidth + prependSpace;
isFirstOfLine = false;
}
}
// return text position & dimensions
return(new Vector2(blockWidth, blockHeight));
}
