/// <summary>
/// Function used to evaluate the length of a text string.
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public TextInfo GetTextInfo(string text)
{
TextInfo temp_textInfo = new TextInfo();
// Early exit if no font asset was assigned. This should not be needed since Arial SDF will be assigned by default.
if (m_fontAsset.characterDictionary == null)
{
Debug.Log("Can't Generate Mesh! No Font Asset has been assigned to Object ID: " + this.GetInstanceID());
return(null);
}
// Early exit if string is empty.
if (text == null || text.Length == 0)
{
return(null);
}
// Convert String to Char[]
StringToCharArray(text, ref m_text_buffer);
int size = GetArraySizes(m_text_buffer);
temp_textInfo.characterInfo = new TMPro_CharacterInfo[size];
m_fontIndex = 0;
m_fontAssetArray[m_fontIndex] = m_fontAsset;
// Scale the font to approximately match the point size
m_fontScale = (m_fontSize / m_fontAssetArray[m_fontIndex].fontInfo.PointSize * (m_isOrthographic ? 1 : 0.1f));
float baseScale = m_fontScale; // BaseScale keeps the character aligned vertically since <size=+000> results in font of different scale.
int charCode = 0; // Holds the character code of the currently being processed character.
int prev_charCode = 0;
//bool isMissingCharacter; // Used to handle missing characters in the Font Atlas / Definition.
m_style = FontStyles.Normal; // Set defaul style as normal.
// GetPadding to adjust the size of the mesh due to border thickness, softness, glow, etc...
if (checkPaddingRequired)
{
checkPaddingRequired = false;
m_padding = ShaderUtilities.GetPadding(m_renderer.sharedMaterials, m_enableExtraPadding, m_isUsingBold);
m_alignmentPadding = ShaderUtilities.GetFontExtent(m_sharedMaterial);
}
float style_padding = 0; // Extra padding required to accomodate Bold style.
float xadvance_multiplier = 1; // Used to increase spacing between character when style is bold.
m_baselineOffset = 0; // Used by subscript characters.
float lineOffset = 0; // Amount of space between lines (font line spacing + m_linespacing).
m_xAdvance = 0; // Used to track the position of each character.
int lineNumber = 0;
int wordCount = 0;
int character_Count = 0; // Total characters in the char[]
int visibleCharacter_Count = 0; // # of visible characters.
// Limit Line Length to whatever size fits all characters on a single line.
m_lineLength = m_lineLength > max_LineWrapLength ? max_LineWrapLength : m_lineLength;
// Initialize struct to track states of word wrapping
m_SaveWordWrapState = new WordWrapState();
int wrappingIndex = 0;
if (temp_textInfo.lineInfo == null)
{
temp_textInfo.lineInfo = new LineInfo[8];
}
for (int i = 0; i < temp_textInfo.lineInfo.Length; i++)
{
temp_textInfo.lineInfo[i] = new LineInfo();
//m_textInfo.lineInfo[i].lineExtents = new Extents(k_InfinityVector, -k_InfinityVector);
}
// Tracking of the highest Ascender
float maxAscender = 0;
float maxDescender = 0;
int lastLineNumber = 0;
int endTagIndex = 0;
// Parse through Character buffer to read html tags and begin creating mesh.
for (int i = 0; m_text_buffer[i] != 0; i++)
{
m_tabSpacing = -999;
m_spacing = -999;
charCode = m_text_buffer[i];
if (m_isRichText && charCode == 60) // '<'
{
// Check if Tag is valid. If valid, skip to the end of the validated tag.
if (ValidateHtmlTag(m_text_buffer, i + 1, out endTagIndex))
{
i = endTagIndex;
if (m_tabSpacing != -999)
{
// Move character to a fix position. Position expresses in characters (approximation).
m_xAdvance = m_tabSpacing * m_cached_Underline_GlyphInfo.width * m_fontScale;
}
if (m_spacing != -999)
{
m_xAdvance += m_spacing * m_fontScale * m_cached_Underline_GlyphInfo.width;
}
continue;
}
}
//isMissingCharacter = false;
// Look up Character Data from Dictionary and cache it.
m_fontAssetArray[m_fontIndex].characterDictionary.TryGetValue(charCode, out m_cached_GlyphInfo);
if (m_cached_GlyphInfo == null)
{
// Character wasn't found in the Dictionary.
m_fontAssetArray[m_fontIndex].characterDictionary.TryGetValue(88, out m_cached_GlyphInfo);
if (m_cached_GlyphInfo != null)
{
Debug.LogWarning("Character with ASCII value of " + charCode + " was not found in the Font Asset Glyph Table.");
// Replace the missing character by X (if it is found)
charCode = 88;
//isMissingCharacter = true;
}
else
{ // At this point the character isn't in the Dictionary, the replacement X isn't either so ...
//continue;
}
}
// Store some of the text object's information
temp_textInfo.characterInfo[character_Count].character = (char)charCode;
//temp_textInfo.characterInfo[character_Count].color = m_htmlColor;
//temp_textInfo.characterInfo[character_Count].style = m_style;
temp_textInfo.characterInfo[character_Count].index = (short)i;
// Handle Kerning if Enabled.
if (m_enableKerning && character_Count >= 1)
{
KerningPairKey keyValue = new KerningPairKey(prev_charCode, charCode);
KerningPair pair;
m_fontAsset.kerningDictionary.TryGetValue(keyValue.key, out pair);
if (pair != null)
{
m_xAdvance += pair.XadvanceOffset * m_fontScale;
}
}
// Set Padding based on selected font style
if ((m_style & FontStyles.Bold) == FontStyles.Bold) // Checks for any combination of Bold Style.
{
style_padding = m_fontAsset.BoldStyle * 2;
xadvance_multiplier = 1.07f; // Increase xAdvance for bold characters.
}
else
{
style_padding = m_fontAsset.NormalStyle * 2;
xadvance_multiplier = 1.0f;
}
// Setup Vertices for each character.
Vector3 top_left = new Vector3(0 + m_xAdvance + ((m_cached_GlyphInfo.xOffset - m_padding - style_padding) * m_fontScale), (m_cached_GlyphInfo.yOffset + m_baselineOffset + m_padding) * m_fontScale - lineOffset * baseScale, 0);
Vector3 bottom_left = new Vector3(top_left.x, top_left.y - ((m_cached_GlyphInfo.height + m_padding * 2) * m_fontScale), 0);
Vector3 top_right = new Vector3(bottom_left.x + ((m_cached_GlyphInfo.width + m_padding * 2 + style_padding * 2) * m_fontScale), top_left.y, 0);
Vector3 bottom_right = new Vector3(top_right.x, bottom_left.y, 0);
// Check if we need to Shear the rectangles for Italic styles
if ((m_style & FontStyles.Italic) == FontStyles.Italic)
{
// Shift Top vertices forward by half (Shear Value * height of character) and Bottom vertices back by same amount.
float shear_value = m_fontAsset.ItalicStyle * 0.01f;
Vector3 topShear = new Vector3(shear_value * ((m_cached_GlyphInfo.yOffset + m_padding + style_padding) * m_fontScale), 0, 0);
Vector3 bottomShear = new Vector3(shear_value * (((m_cached_GlyphInfo.yOffset - m_cached_GlyphInfo.height - m_padding - style_padding)) * m_fontScale), 0, 0);
top_left = top_left + topShear;
bottom_left = bottom_left + bottomShear;
top_right = top_right + topShear;
bottom_right = bottom_right + bottomShear;
}
// Track Word Count per line and for the object
if (character_Count > 0 && (char.IsWhiteSpace((char)charCode) || char.IsPunctuation((char)charCode)))
{
if (char.IsLetterOrDigit(temp_textInfo.characterInfo[character_Count - 1].character))
{
wordCount += 1;
temp_textInfo.lineInfo[lineNumber].wordCount += 1;
}
}
// Setup Mesh for visible characters. ie. not a SPACE / LINEFEED / CARRIAGE RETURN.
if (charCode != 32 && charCode != 9 && charCode != 10 && charCode != 13)
{
// Determine the bounds of the Mesh.
//meshExtents.min = new Vector2(Mathf.Min(meshExtents.min.x, bottom_left.x), Mathf.Min(meshExtents.min.y, bottom_left.y));
//meshExtents.max = new Vector2(Mathf.Max(meshExtents.max.x, top_right.x), Mathf.Max(meshExtents.max.y, top_left.y));
// Determine the extend of each line
LineInfo lineInfo = temp_textInfo.lineInfo[lineNumber];
Extents lineExtents = lineInfo.lineExtents;
temp_textInfo.lineInfo[lineNumber].lineExtents.min = new Vector2(Mathf.Min(lineExtents.min.x, bottom_left.x), Mathf.Min(lineExtents.min.y, bottom_left.y));
temp_textInfo.lineInfo[lineNumber].lineExtents.max = new Vector2(Mathf.Max(lineExtents.max.x, top_right.x), Mathf.Max(lineExtents.max.y, top_left.y));
if (m_enableWordWrapping && top_right.x > m_lineLength)
{
// Check if further wrapping is possible or if we need to increase the line length
if (wrappingIndex == m_SaveWordWrapState.previous_WordBreak)
{
if (isAffectingWordWrapping)
{
m_lineLength = Mathf.Round(top_right.x * 100 + 0.5f) / 100f;//m_lineLength = top_right.x;
GenerateTextMesh();
isAffectingWordWrapping = false;
}
Debug.Log("Line " + lineNumber + " Cannot wrap lines anymore.");
return(null);
}
// Restore to previously stored state
character_Count = m_SaveWordWrapState.total_CharacterCount + 1;
visibleCharacter_Count = m_SaveWordWrapState.visible_CharacterCount;
m_textInfo.lineInfo[lineNumber] = m_SaveWordWrapState.lineInfo;
m_htmlColor = m_SaveWordWrapState.vertexColor;
m_style = m_SaveWordWrapState.fontStyle;
m_baselineOffset = m_SaveWordWrapState.baselineOffset;
m_fontScale = m_SaveWordWrapState.fontScale;
i = m_SaveWordWrapState.previous_WordBreak;
wrappingIndex = i; // Used to dectect when line length can no longer be reduced.
lineNumber += 1;
// Check to make sure Array is large enough to hold a new line.
if (lineNumber >= temp_textInfo.lineInfo.Length)
{
Array.Resize(ref temp_textInfo.lineInfo, Mathf.NextPowerOfTwo(lineNumber));
}
lineOffset += (m_fontAssetArray[m_fontIndex].fontInfo.LineHeight + m_lineSpacing);
m_xAdvance = 0;
continue;
}
//visibleCharacter_Count += 1;
}
else
{ // This is a Space, Tab, LineFeed or Carriage Return
// Track # of spaces per line which is used for line justification.
if (charCode == 9 || charCode == 32)
{
//m_lineExtents[lineNumber].spaceCount += 1;
temp_textInfo.lineInfo[lineNumber].spaceCount += 1;
temp_textInfo.spaceCount += 1;
}
// We store the state of numerous variables for the most recent Space, LineFeed or Carriage Return to enable them to be restored
// for Word Wrapping.
m_SaveWordWrapState.previous_WordBreak = i;
m_SaveWordWrapState.total_CharacterCount = character_Count;
m_SaveWordWrapState.visible_CharacterCount = visibleCharacter_Count;
m_SaveWordWrapState.maxLineLength = m_xAdvance;
m_SaveWordWrapState.fontScale = m_fontScale;
m_SaveWordWrapState.baselineOffset = m_baselineOffset;
m_SaveWordWrapState.fontStyle = m_style;
m_SaveWordWrapState.vertexColor = m_htmlColor;
m_SaveWordWrapState.lineInfo = temp_textInfo.lineInfo[lineNumber];
}
// Store Rectangle positions for each Character.
temp_textInfo.characterInfo[character_Count].bottomLeft = bottom_left;
temp_textInfo.characterInfo[character_Count].topRight = top_right;
temp_textInfo.characterInfo[character_Count].lineNumber = (short)lineNumber;
//temp_textInfo.characterInfo[character_Count].baseLine = top_right.y - (m_cached_GlyphInfo.yOffset + m_padding) * m_fontScale;
//temp_textInfo.characterInfo[character_Count].topLine = temp_textInfo.characterInfo[character_Count].baseLine + (m_fontAssetArray[m_fontIndex].fontInfo.Ascender + m_alignmentPadding.y) * m_fontScale; // Ascender
//temp_textInfo.characterInfo[character_Count].bottomLine = temp_textInfo.characterInfo[character_Count].baseLine + (m_fontAssetArray[m_fontIndex].fontInfo.Descender - m_alignmentPadding.w) * m_fontScale; // Descender
maxAscender = temp_textInfo.characterInfo[character_Count].topLine > maxAscender ? temp_textInfo.characterInfo[character_Count].topLine : maxAscender;
maxDescender = temp_textInfo.characterInfo[character_Count].bottomLine < maxDescender ? temp_textInfo.characterInfo[character_Count].bottomLine : maxDescender;
//temp_textInfo.characterInfo[character_Count].aspectRatio = m_cached_GlyphInfo.width / m_cached_GlyphInfo.height;
//temp_textInfo.characterInfo[character_Count].scale = m_fontScale;
temp_textInfo.lineInfo[lineNumber].characterCount += 1;
//Debug.Log("Character #" + i + " is [" + (char)charCode + "] ASCII (" + charCode + ")");
// Store LineInfo
if (lineNumber != lastLineNumber)
{
temp_textInfo.lineInfo[lineNumber].firstCharacterIndex = character_Count;
temp_textInfo.lineInfo[lineNumber - 1].lastCharacterIndex = character_Count - 1;
temp_textInfo.lineInfo[lineNumber - 1].characterCount = temp_textInfo.lineInfo[lineNumber - 1].lastCharacterIndex - temp_textInfo.lineInfo[lineNumber - 1].firstCharacterIndex + 1;
temp_textInfo.lineInfo[lineNumber - 1].lineLength = temp_textInfo.characterInfo[character_Count - 1].topRight.x - m_padding * m_fontScale;
}
lastLineNumber = lineNumber;
// Handle Tabulation Stops. Tab stops at every 25% of Font Size.
if (charCode == 9)
{
m_xAdvance = (int)(m_xAdvance / (m_fontSize * 0.25f) + 1) * (m_fontSize * 0.25f);
}
else
{
m_xAdvance += (m_cached_GlyphInfo.xAdvance * xadvance_multiplier * m_fontScale) + m_characterSpacing;
}
// Handle Line Feed as well as Word Wrapping
if (charCode == 10 || charCode == 13)
{
lineNumber += 1;
// Check to make sure Array is large enough to hold a new line.
if (lineNumber >= temp_textInfo.lineInfo.Length)
{
Array.Resize(ref temp_textInfo.lineInfo, Mathf.NextPowerOfTwo(lineNumber));
}
lineOffset += (m_fontAssetArray[m_fontIndex].fontInfo.LineHeight + m_lineSpacing);
m_xAdvance = 0;
}
character_Count += 1;
prev_charCode = charCode;
}
temp_textInfo.lineInfo[lineNumber].lastCharacterIndex = character_Count - 1;
temp_textInfo.lineInfo[lineNumber].characterCount = temp_textInfo.lineInfo[lineNumber].lastCharacterIndex - temp_textInfo.lineInfo[lineNumber].firstCharacterIndex + 1;
temp_textInfo.lineInfo[lineNumber].lineLength = temp_textInfo.characterInfo[character_Count - 1].topRight.x - m_padding * m_fontScale;
//m_textMetrics = new TMPro_TextMetrics();
temp_textInfo.characterCount = character_Count;
temp_textInfo.lineCount = lineNumber + 1;
temp_textInfo.wordCount = wordCount;
//for (int i = 0; i < lineNumber + 1; i++)
//{
// Debug.Log("Line: " + (i + 1) + " # Char: " + temp_textInfo.lineInfo[i].characterCount
// + " Word Count: " + temp_textInfo.lineInfo[i].wordCount
// + " Space: " + temp_textInfo.lineInfo[i].spaceCount
// + " First:" + temp_textInfo.lineInfo[i].firstCharacterIndex + " Last [" + temp_textInfo.characterInfo[temp_textInfo.lineInfo[i].lastCharacterIndex].character
// + "] at Index: " + temp_textInfo.lineInfo[i].lastCharacterIndex + " Length: " + temp_textInfo.lineInfo[i].lineLength
// + " Line Extents: " + temp_textInfo.lineInfo[i].lineExtents);
// //Debug.Log("line: " + (i + 1) + " m_lineExtents Count: " + m_lineExtents[i].characterCount + " lineInfo: " + m_textInfo.lineInfo[i].characterCount);
// //Debug.DrawLine(new Vector3(m_textInfo.lineInfo[i].lineLength, 2, 0), new Vector3(m_textInfo.lineInfo[i].lineLength, -2, 0), Color.red, 30f);
//}
return(temp_textInfo);
}
// Function to increase the size of the Line Extents Array.
void ResizeLineExtents(int size)
{
size = size > 1024 ? size + 256 : Mathf.NextPowerOfTwo(size + 1);
LineInfo[] temp_lineInfo = new LineInfo[size];
for (int i = 0; i < size; i++)
{
if (i < m_textInfo.lineInfo.Length)
temp_lineInfo[i] = m_textInfo.lineInfo[i];
else
{
temp_lineInfo[i].lineExtents = new Extents(k_InfinityVector, -k_InfinityVector);
temp_lineInfo[i].ascender = -k_InfinityVector.x;
temp_lineInfo[i].descender = k_InfinityVector.x;
}
}
m_textInfo.lineInfo = temp_lineInfo;
}
// Function to increase the size of the Line Extents Array.
void ResizeLineExtents(int size)
{
size = size > 1024 ? size + 256 : Mathf.NextPowerOfTwo(size + 1);
LineInfo[] temp_lineInfo = new LineInfo[size];
for (int i = 0; i < m_textInfo.lineInfo.Length; i++)
temp_lineInfo[i] = m_textInfo.lineInfo[i];
m_textInfo.lineInfo = temp_lineInfo;
}
