public void WriteLineInfo(TextLayoutCommandStream output,
Int32 lineWidth, Int32 lineHeight, Int32 lengthInCommands, Int32 lengthInGlyphs, Boolean terminatedByLineBreak, ref TextLayoutSettings settings)
{
var offset = 0;
if (settings.Width.HasValue)
{
if ((settings.Flags & TextFlags.AlignRight) == TextFlags.AlignRight)
{
offset = (settings.Width.Value - lineWidth);
}
else if ((settings.Flags & TextFlags.AlignCenter) == TextFlags.AlignCenter)
{
offset = (settings.Width.Value - lineWidth) / 2;
}
}
var outputStreamPosition = output.StreamPositionInObjects;
output.Seek(lineInfoCommandIndex);
unsafe
{
var ptr = (TextLayoutLineInfoCommand *)output.Data;
ptr->Offset = offset;
ptr->LineWidth = lineWidth;
ptr->LineHeight = lineHeight;
ptr->LengthInCommands = lengthInCommands;
ptr->LengthInGlyphs = lengthInGlyphs;
ptr->TerminatedByLineBreak = terminatedByLineBreak;
}
output.Seek(outputStreamPosition);
minLineOffset = (minLineOffset.HasValue) ? Math.Min(minLineOffset.Value, offset) : offset;
}
public void WriteBlockInfo(TextLayoutCommandStream output, Int32 blockWidth, Int32 blockHeight, Int32 lengthInLines, ref TextLayoutSettings settings)
{
var offset = 0;
if (settings.Height.HasValue)
{
if ((settings.Flags & TextFlags.AlignBottom) == TextFlags.AlignBottom)
{
offset = (settings.Height.Value - blockHeight);
}
else if ((settings.Flags & TextFlags.AlignMiddle) == TextFlags.AlignMiddle)
{
offset = (settings.Height.Value - blockHeight) / 2;
}
}
output.Seek(0);
unsafe
{
var ptr = (TextLayoutBlockInfoCommand *)output.Data;
ptr->Offset = offset;
ptr->LengthInLines = lengthInLines;
}
output.Seek(output.Count);
minBlockOffset = (minBlockOffset.HasValue) ? Math.Min(minBlockOffset.Value, offset) : offset;
}
public void WriteLineInfo(TextLayoutCommandStream output,
Int32 lineWidth, Int32 lineHeight, Int32 lengthInCommands, Int32 lengthInGlyphs, Boolean terminatedByLineBreak, ref TextLayoutSettings settings)
{
var offset = 0;
if (settings.Width.HasValue)
{
if ((settings.Flags & TextFlags.AlignRight) == TextFlags.AlignRight)
offset = (settings.Width.Value - lineWidth);
else if ((settings.Flags & TextFlags.AlignCenter) == TextFlags.AlignCenter)
offset = (settings.Width.Value - lineWidth) / 2;
}
var outputStreamPosition = output.StreamPositionInObjects;
output.Seek(lineInfoCommandIndex);
unsafe
{
var ptr = (TextLayoutLineInfoCommand*)output.Data;
ptr->Offset = offset;
ptr->LineWidth = lineWidth;
ptr->LineHeight = lineHeight;
ptr->LengthInCommands = lengthInCommands;
ptr->LengthInGlyphs = lengthInGlyphs;
ptr->TerminatedByLineBreak = terminatedByLineBreak;
}
output.Seek(outputStreamPosition);
minLineOffset = (minLineOffset.HasValue) ? Math.Min(minLineOffset.Value, offset) : offset;
}
public void WriteBlockInfo(TextLayoutCommandStream output, Int32 blockWidth, Int32 blockHeight, Int32 lengthInLines, ref TextLayoutSettings settings)
{
var offset = 0;
if (settings.Height.HasValue)
{
if ((settings.Flags & TextFlags.AlignBottom) == TextFlags.AlignBottom)
offset = (settings.Height.Value - blockHeight);
else if ((settings.Flags & TextFlags.AlignMiddle) == TextFlags.AlignMiddle)
offset = (settings.Height.Value - blockHeight) / 2;
}
output.Seek(0);
unsafe
{
var ptr = (TextLayoutBlockInfoCommand*)output.Data;
ptr->Offset = offset;
ptr->LengthInLines = lengthInLines;
}
output.Seek(output.Count);
minBlockOffset = (minBlockOffset.HasValue) ? Math.Min(minBlockOffset.Value, offset) : offset;
}
private unsafe void FixHorizontalAlignmentForUnconstrainedLayout(TextLayoutCommandStream output, ref TextLayoutSettings settings)
{
output.Seek(0);
while (output.SeekNextLine())
{
var lineInfo = (TextLayoutLineInfoCommand *)output.InternalObjectStream.Data;
if ((settings.Flags & TextFlags.AlignRight) == TextFlags.AlignRight)
{
lineInfo->Offset = (output.ActualWidth - lineInfo->LineWidth);
}
else if ((settings.Flags & TextFlags.AlignCenter) == TextFlags.AlignCenter)
{
lineInfo->Offset = (output.ActualWidth - lineInfo->LineWidth) / 2;
}
}
}
public unsafe Boolean ReplaceLastBreakingSpaceWithLineBreak(TextLayoutCommandStream output, ref TextLayoutSettings settings)
{
if (!lineBreakCommand.HasValue || !lineBreakOffset.HasValue)
{
return(false);
}
var sizeBeforeBreak = brokenTextSizeBeforeBreak.Value;
var sizeAfterBreak = brokenTextSizeAfterBreak.Value;
var brokenCommandSize = Size2.Zero;
var brokenCommandOffset = 0;
var brokenCommandLength = 0;
var newLineHeight = sizeAfterBreak.Height;
if (newLineHeight == 0)
{
newLineHeight = settings.Font.GetFace(SpriteFontStyle.Regular).LineSpacing;
}
// Truncate the command which is being broken.
output.Seek(lineBreakCommand.Value);
unsafe
{
var cmd = (TextLayoutTextCommand *)output.Data;
brokenCommandOffset = cmd->TextOffset;
brokenCommandLength = cmd->TextLength;
brokenCommandSize = cmd->Bounds.Size;
cmd->TextLength = lineBreakOffset.Value;
cmd->TextWidth = (Int16)sizeBeforeBreak.Width;
cmd->TextHeight = (Int16)sizeBeforeBreak.Height;
}
output.SeekNextCommand();
// Insert a line break, a new line, and the second half of the truncated text.
var part1Length = lineBreakOffset.Value;
var part2Offset = brokenCommandOffset + (lineBreakOffset.Value + 1);
var part2Length = brokenCommandLength - (part1Length + 1);
var part2IsNotDegenerate = (part2Length > 0);
var numberOfObjects = part2IsNotDegenerate ? 3 : 2;
var numberOfBytes =
sizeof(TextLayoutLineBreakCommand) +
sizeof(TextLayoutLineInfoCommand) +
(part2IsNotDegenerate ? sizeof(TextLayoutTextCommand) : 0);
var insertionPosition = output.InternalObjectStream.PositionInObjects;
output.InternalObjectStream.ReserveInsert(numberOfObjects, numberOfBytes);
*(TextLayoutLineBreakCommand *)output.Data = new TextLayoutLineBreakCommand(1);
output.InternalObjectStream.FinalizeObject(sizeof(TextLayoutLineBreakCommand));
*(TextLayoutCommandType *)output.Data = TextLayoutCommandType.LineInfo;
output.InternalObjectStream.FinalizeObject(sizeof(TextLayoutLineInfoCommand));
if (part2IsNotDegenerate)
{
var textOffset = part2Offset;
var textLength = part2Length;
*(TextLayoutTextCommand *)output.InternalObjectStream.Data = new TextLayoutTextCommand(textOffset, textLength,
0, positionY + lineHeight, (Int16)sizeAfterBreak.Width, (Int16)sizeAfterBreak.Height);
output.InternalObjectStream.FinalizeObject(sizeof(TextLayoutTextCommand));
}
// Add the line break command to the broken line.
AdvanceLineToNextCommand(0, 0, 1, 1);
// Recalculate the parameters for the broken line.
output.Seek(LineInfoCommandIndex + 1);
var brokenLineWidth = 0;
var brokenLineHeight = 0;
var brokenLineLengthInText = 0;
var brokenLineLengthInCommands = 0;
var cmdType = TextLayoutCommandType.None;
while ((cmdType = *(TextLayoutCommandType *)output.Data) != TextLayoutCommandType.LineInfo)
{
switch (cmdType)
{
case TextLayoutCommandType.Text:
{
var cmd = (TextLayoutTextCommand *)output.Data;
brokenLineWidth += cmd->TextWidth;
brokenLineHeight = Math.Max(brokenLineHeight, cmd->TextHeight);
brokenLineLengthInText += cmd->TextLength;
}
break;
case TextLayoutCommandType.Icon:
{
var cmd = (TextLayoutIconCommand *)output.Data;
brokenLineWidth += cmd->Bounds.Width;
brokenLineHeight = Math.Max(brokenLineHeight, cmd->Bounds.Height);
brokenLineLengthInText += 1;
}
break;
case TextLayoutCommandType.LineBreak:
{
var cmd = (TextLayoutLineBreakCommand *)output.Data;
brokenLineLengthInText += cmd->Length;
}
break;
}
brokenLineLengthInCommands++;
output.SeekNextCommand();
}
// Finalize the broken line.
totalLength = (totalLength - lineLengthInText) + brokenLineLengthInText;
lineWidth = brokenLineWidth;
lineHeight = brokenLineHeight;
lineLengthInText = brokenLineLengthInText;
lineLengthInCommands = brokenLineLengthInCommands;
FinalizeLine(output, ref settings);
// Fixup token bounds and update parameters for new line.
LineInfoCommandIndex = insertionPosition + 1;
while (output.StreamPositionInObjects < output.Count)
{
var width = 0;
var height = 0;
var lengthInCommands = 0;
var lengthInText = 0;
switch (*(TextLayoutCommandType *)output.Data)
{
case TextLayoutCommandType.Text:
{
var cmd = (TextLayoutTextCommand *)output.Data;
width = cmd->TextWidth;
height = cmd->TextHeight;
lengthInCommands = 1;
lengthInText = cmd->TextLength;
cmd->TextX = PositionX;
cmd->TextY = PositionY;
}
break;
case TextLayoutCommandType.Icon:
{
var cmd = (TextLayoutIconCommand *)output.Data;
width = cmd->IconWidth;
height = cmd->IconHeight;
lengthInCommands = 1;
lengthInText = 1;
cmd->IconX = PositionX;
cmd->IconY = PositionY;
}
break;
case TextLayoutCommandType.LineBreak:
{
var cmd = (TextLayoutLineBreakCommand *)output.Data;
lengthInText += cmd->Length;
}
break;
}
AdvanceLineToNextCommand(width, height, lengthInCommands, lengthInText);
output.SeekNextCommand();
}
return(true);
}
private unsafe void FixHorizontalAlignmentForUnconstrainedLayout(TextLayoutCommandStream output, ref TextLayoutSettings settings)
{
output.Seek(0);
while (output.SeekNextLine())
{
var lineInfo = (TextLayoutLineInfoCommand*)output.InternalObjectStream.Data;
if ((settings.Flags & TextFlags.AlignRight) == TextFlags.AlignRight)
lineInfo->Offset = (output.ActualWidth - lineInfo->LineWidth);
else if ((settings.Flags & TextFlags.AlignCenter) == TextFlags.AlignCenter)
lineInfo->Offset = (output.ActualWidth - lineInfo->LineWidth) / 2;
}
}
public unsafe Boolean ReplaceLastBreakingSpaceWithLineBreak(TextLayoutCommandStream output, ref TextLayoutSettings settings)
{
if (!lineBreakCommand.HasValue || !lineBreakOffset.HasValue)
return false;
var sizeBeforeBreak = brokenTextSizeBeforeBreak.Value;
var sizeAfterBreak = brokenTextSizeAfterBreak.Value;
var brokenCommandSize = Size2.Zero;
var brokenCommandOffset = 0;
var brokenCommandLength = 0;
var newLineHeight = sizeAfterBreak.Height;
if (newLineHeight == 0)
newLineHeight = settings.Font.GetFace(SpriteFontStyle.Regular).LineSpacing;
// Truncate the command which is being broken.
output.Seek(lineBreakCommand.Value);
unsafe
{
var cmd = (TextLayoutTextCommand*)output.Data;
brokenCommandOffset = cmd->TextOffset;
brokenCommandLength = cmd->TextLength;
brokenCommandSize = cmd->Bounds.Size;
cmd->TextLength = lineBreakOffset.Value;
cmd->TextWidth = (Int16)sizeBeforeBreak.Width;
cmd->TextHeight = (Int16)sizeBeforeBreak.Height;
}
output.SeekNextCommand();
// Insert a line break, a new line, and the second half of the truncated text.
var part1Length = lineBreakOffset.Value;
var part2Offset = brokenCommandOffset + (lineBreakOffset.Value + 1);
var part2Length = brokenCommandLength - (part1Length + 1);
var part2IsNotDegenerate = (part2Length > 0);
var numberOfObjects = part2IsNotDegenerate ? 3 : 2;
var numberOfBytes =
sizeof(TextLayoutLineBreakCommand) +
sizeof(TextLayoutLineInfoCommand) +
(part2IsNotDegenerate ? sizeof(TextLayoutTextCommand) : 0);
var insertionPosition = output.InternalObjectStream.PositionInObjects;
output.InternalObjectStream.ReserveInsert(numberOfObjects, numberOfBytes);
*(TextLayoutLineBreakCommand*)output.Data = new TextLayoutLineBreakCommand(1);
output.InternalObjectStream.FinalizeObject(sizeof(TextLayoutLineBreakCommand));
*(TextLayoutCommandType*)output.Data = TextLayoutCommandType.LineInfo;
output.InternalObjectStream.FinalizeObject(sizeof(TextLayoutLineInfoCommand));
if (part2IsNotDegenerate)
{
var textOffset = part2Offset;
var textLength = part2Length;
*(TextLayoutTextCommand*)output.InternalObjectStream.Data = new TextLayoutTextCommand(textOffset, textLength,
0, positionY + lineHeight, (Int16)sizeAfterBreak.Width, (Int16)sizeAfterBreak.Height);
output.InternalObjectStream.FinalizeObject(sizeof(TextLayoutTextCommand));
}
// Add the line break command to the broken line.
AdvanceLineToNextCommand(0, 0, 1, 1);
// Recalculate the parameters for the broken line.
output.Seek(LineInfoCommandIndex + 1);
var brokenLineWidth = 0;
var brokenLineHeight = 0;
var brokenLineLengthInText = 0;
var brokenLineLengthInCommands = 0;
var cmdType = TextLayoutCommandType.None;
while ((cmdType = *(TextLayoutCommandType*)output.Data) != TextLayoutCommandType.LineInfo)
{
switch (cmdType)
{
case TextLayoutCommandType.Text:
{
var cmd = (TextLayoutTextCommand*)output.Data;
brokenLineWidth += cmd->TextWidth;
brokenLineHeight = Math.Max(brokenLineHeight, cmd->TextHeight);
brokenLineLengthInText += cmd->TextLength;
}
break;
case TextLayoutCommandType.Icon:
{
var cmd = (TextLayoutIconCommand*)output.Data;
brokenLineWidth += cmd->Bounds.Width;
brokenLineHeight = Math.Max(brokenLineHeight, cmd->Bounds.Height);
brokenLineLengthInText += 1;
}
break;
case TextLayoutCommandType.LineBreak:
{
var cmd = (TextLayoutLineBreakCommand*)output.Data;
brokenLineLengthInText += cmd->Length;
}
break;
}
brokenLineLengthInCommands++;
output.SeekNextCommand();
}
// Finalize the broken line.
totalLength = (totalLength - lineLengthInText) + brokenLineLengthInText;
lineWidth = brokenLineWidth;
lineHeight = brokenLineHeight;
lineLengthInText = brokenLineLengthInText;
lineLengthInCommands = brokenLineLengthInCommands;
FinalizeLine(output, ref settings);
// Fixup token bounds and update parameters for new line.
LineInfoCommandIndex = insertionPosition + 1;
while (output.StreamPositionInObjects < output.Count)
{
var width = 0;
var height = 0;
var lengthInCommands = 0;
var lengthInText = 0;
switch (*(TextLayoutCommandType*)output.Data)
{
case TextLayoutCommandType.Text:
{
var cmd = (TextLayoutTextCommand*)output.Data;
width = cmd->TextWidth;
height = cmd->TextHeight;
lengthInCommands = 1;
lengthInText = cmd->TextLength;
cmd->TextX = PositionX;
cmd->TextY = PositionY;
}
break;
case TextLayoutCommandType.Icon:
{
var cmd = (TextLayoutIconCommand*)output.Data;
width = cmd->IconWidth;
height = cmd->IconHeight;
lengthInCommands = 1;
lengthInText = 1;
cmd->IconX = PositionX;
cmd->IconY = PositionY;
}
break;
case TextLayoutCommandType.LineBreak:
{
var cmd = (TextLayoutLineBreakCommand*)output.Data;
lengthInText += cmd->Length;
}
break;
}
AdvanceLineToNextCommand(width, height, lengthInCommands, lengthInText);
output.SeekNextCommand();
}
return true;
}
