public void DoLayout()
{
//user can use other native methods
//to do the layout ***
//the following code is how-to-layout with
//our Typography lib
//
//then at this step
//we calculate span size
//resolve each font style
_glyphLayout.FontSizeInPoints = FontSizeInPts; //
_glyphLayout.EnableComposition = true;
_glyphLayout.EnableLigature = true;
int lineCount = _lines.Count;
List <GlyphPlan> outputGlyphPlan = new List <GlyphPlan>();
GlyphPlanBuffer glyphPlanBuffer = new GlyphPlanBuffer(outputGlyphPlan);
Typeface selectedTypeface = this.DefaultTypeface;
for (int i = 0; i < lineCount; ++i)
{
EditableTextLine line = _lines[i];
List <IRun> runList = line.UnsageGetTextRunList();
int runCount = runList.Count;
for (int r = 0; r < runCount; ++r)
{
TextRun tt = runList[r] as TextRun;
if (tt == null)
{
continue;
}
//this is text run
if (tt.IsMeasured)
{
continue;
}
//
TextRunFontStyle fontStyle = tt.FontStyle;
//resolve to actual font face
TextBuffer buffer = tt.TextBuffer;
char[] rawBuffer = buffer.UnsafeGetInternalBuffer();
int preCount = outputGlyphPlan.Count;
_glyphLayout.Layout(selectedTypeface, rawBuffer, tt.StartAt, tt.Len, outputGlyphPlan);
int postCount = outputGlyphPlan.Count;
//
tt.SetGlyphPlanSeq(new GlyphPlanSequence(glyphPlanBuffer, preCount, postCount - preCount));
tt.IsMeasured = true;
//
}
}
}
public void LoadText(string text)
{
//1. all line is clear
//
//2. new text is parsed into multiple line (line break)
//
//3. eachline parse its own word in its context
//output is a line group of run
//TODO: extend with custom lexer***
//test only ...
TextRunFontStyle fontStyle = new TextRunFontStyle();
fontStyle.Name = "tahoma";
fontStyle.SizeInPoints = FontSizeInPts;//10 pts;
TextBuffer buffer = new TextBuffer(text.ToCharArray());
_textBlockLexer.Lex(buffer);
//create a set of line
List <LexWordSpan> spanLists = _textBlockLexer.ResultSpans;
_lines.Clear();
int j = spanLists.Count;
EditableTextLine line = new EditableTextLine();
_lines.Add(line);
//create text run from parsed word span
for (int i = 0; i < j; ++i)
{
LexWordSpan sp = spanLists[i];
if (sp.kind == WordSpanKind.NewLine)
{
line.ExplicitEnd = true;
line = new EditableTextLine();
line.LineNumber = _lines.Count;
_lines.Add(line);
}
else
{
//create a 'Run' for this span
TextRun textRun = new TextRun(buffer, sp.start, sp.len, sp.kind);
//add property font style to text run
textRun.FontStyle = fontStyle;
line.AppendLast(textRun);
}
}
//at this point each text run in the line is not layout,
//no span size calculation
//------------
//we can calculate the text run size when
//we known more about font of each style
}
public void DoLayout()
{
//----------------
//TODO: use typography text service
//it should be faster since it has glyph-plan cache
//----------------
//user can use other native methods
//to do the layout ***
//the following code is how-to-layout with
//our Typography lib
//
//then at this step
//we calculate span size
//resolve each font style
_glyphLayout.EnableComposition = true;
_glyphLayout.EnableLigature = true;
int lineCount = _lines.Count;
Typeface selectedTypeface = this.DefaultTypeface;
float pxscale = selectedTypeface.CalculateScaleToPixelFromPointSize(this.FontSizeInPts);
for (int i = 0; i < lineCount; ++i)
{
EditableTextLine line = _lines[i];
List <IRun> runList = line.UnsageGetTextRunList();
int runCount = runList.Count;
for (int r = 0; r < runCount; ++r)
{
TextRun tt = runList[r] as TextRun;
if (tt == null)
{
continue;
}
//this is text run
if (tt.IsMeasured)
{
continue;
}
//
TextRunFontStyle fontStyle = tt.FontStyle;
//resolve to actual font face
TextBuffer buffer = tt.TextBuffer;
char[] rawBuffer = buffer.UnsafeGetInternalBuffer();
//TODO: review here again
int preCount = _outputGlyphPlan.Count;
_glyphLayout.Typeface = selectedTypeface;
_glyphLayout.Layout(rawBuffer, tt.StartAt, tt.Len);
_glyphLayout.GenerateUnscaledGlyphPlans(_outputGlyphPlan);
//use pixel-scale-layout-engine to scale to specific font size
//or scale it manually
int postCount = _outputGlyphPlan.Count;
//
tt.SetGlyphPlanSeq(new GlyphPlanSequence(_outputGlyphPlan, preCount, postCount - preCount));
tt.IsMeasured = true;
//
}
}
}
