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text_test.go
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text_test.go
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package canvas
import (
"testing"
"github.com/tdewolff/test"
)
func TestTextLine(t *testing.T) {
family := NewFontFamily("dejavu-serif")
if err := family.LoadFontFile("resources/DejaVuSerif.ttf", FontRegular); err != nil {
test.Error(t, err)
}
face := family.Face(12.0*ptPerMm, Black, FontRegular, FontNormal, FontUnderline)
text := NewTextLine(face, "test\nline", Left)
test.T(t, len(text.fonts), 1)
test.T(t, len(text.lines), 2)
test.T(t, len(text.lines[0].spans), 1)
test.Float(t, text.lines[0].spans[0].X, 0.0)
test.Float(t, text.lines[0].y, 0.0)
test.T(t, len(text.lines[1].spans), 1)
test.Float(t, text.lines[1].spans[0].X, 0.0)
test.Float(t, text.lines[1].y, face.Metrics().LineHeight)
text = NewTextLine(face, "test\nline", Center)
test.Float(t, text.lines[0].spans[0].X, -0.5*text.lines[0].spans[0].Width)
test.Float(t, text.lines[1].spans[0].X, -0.5*text.lines[1].spans[0].Width)
text = NewTextLine(face, "test\nline", Right)
test.Float(t, text.lines[0].spans[0].X, -text.lines[0].spans[0].Width)
test.Float(t, text.lines[1].spans[0].X, -text.lines[1].spans[0].Width)
}
func TestRichText(t *testing.T) {
family := NewFontFamily("dejavu-serif")
if err := family.LoadFontFile("resources/DejaVuSerif.ttf", FontRegular); err != nil {
test.Error(t, err)
}
pt := ptPerMm * float64(family.fonts[FontRegular].Head.UnitsPerEm)
face := family.Face(pt, Black, FontRegular, FontNormal) // line height is 13.96875
rt := NewRichText(face)
rt.WriteString("ee. ee eeee") // e is 1212 wide, dot and space are 651 wide
// test halign
text := rt.ToText(6500.0, 5000.0, Left, Top, 0.0, 0.0)
test.T(t, len(text.lines), 2)
test.Float(t, text.lines[0].y, 1901)
test.Float(t, text.lines[1].y, 4285)
test.Float(t, text.lines[0].spans[0].X, 0.0)
test.Float(t, text.lines[0].spans[0].Width, 6150)
test.Float(t, text.lines[1].spans[0].X, 0.0)
test.Float(t, text.lines[1].spans[0].Width, 4848)
text = rt.ToText(6500.0, 5000.0, Right, Top, 0.0, 0.0)
test.Float(t, text.lines[0].spans[0].X, 6500-6150)
test.Float(t, text.lines[1].spans[0].X, 6500-4848)
text = rt.ToText(6500.0, 5000.0, Center, Top, 0.0, 0.0)
test.Float(t, text.lines[0].spans[0].X, (6500-6150)/2)
test.Float(t, text.lines[1].spans[0].X, (6500-4848)/2)
text = rt.ToText(6500.0, 5000.0, Justify, Top, 0.0, 0.0)
test.Float(t, text.lines[0].spans[0].X, 0.0)
test.Float(t, text.lines[1].spans[0].X, 0.0)
// test valign
text = rt.ToText(6500.0, 5000.0, Left, Bottom, 0.0, 0.0)
test.Float(t, text.lines[0].y, 5000-2867)
test.Float(t, text.lines[1].y, 5000-483)
text = rt.ToText(6500.0, 5000.0, Left, Center, 0.0, 0.0)
test.Float(t, text.lines[0].y, (1901+(5000-1901-483*2))/2)
test.Float(t, text.lines[1].y, (1901*2+483+(5000-483))/2)
text = rt.ToText(6500.0, 5000.0, Left, Justify, 0.0, 0.0)
test.Float(t, text.lines[0].y, 1901)
test.Float(t, text.lines[1].y, 5000-483)
// test wrapping
text = rt.ToText(6000.0, 7500.0, Left, Top, 0.0, 0.0)
test.T(t, len(text.lines), 3)
test.Float(t, text.lines[0].spans[0].X, 0.0)
test.Float(t, text.lines[1].spans[0].X, 0.0)
test.Float(t, text.lines[2].spans[0].X, 0.0)
// test special cases
text = rt.ToText(6500.0, 2000.0, Left, Top, 0.0, 0.0)
test.T(t, len(text.lines), 0)
text = rt.ToText(0.0, 5000.0, Left, Top, 0.0, 0.0)
test.T(t, len(text.lines), 1)
test.T(t, len(text.lines[0].spans), 1)
test.Float(t, text.lines[0].spans[0].X, 0.0)
//rt = NewRichText(face)
//text = rt.ToText(55.0, 50.0, Left, Top, 0.0, 0.0)
//test.T(t, len(text.lines), 0)
//rt = NewRichText(face)
//rt.WriteString("mm ")
//rt.WriteString(" mm ")
//rt.WriteString(" \n ")
//rt.WriteString("mmmm")
//rt.WriteString(" mmmm ")
//text = rt.ToText(75.0, 30.0, Justify, Top, 0.0, 0.0)
//test.T(t, len(text.lines), 2)
//test.Float(t, text.lines[0].spans[0].dx, 0.0)
//test.Float(t, text.lines[0].spans[0].width, 75.0)
//test.Float(t, text.lines[0].spans[0].GlyphSpacing, (75.0-22.75-3.8125-MaxWordSpacing*face.Metrics().XHeight-22.75)/4)
//test.Float(t, text.lines[1].spans[0].dx, 0.0)
//test.Float(t, text.lines[1].spans[0].width, 45.5) // cannot stretch in any reasonable way
//rt = NewRichText(face)
//rt.WriteString("mm. ")
//text = rt.ToText(30.0, 50.0, Left, Top, 0.0, 0.0) // wrap at space
//test.T(t, len(text.lines), 1)
//rt = NewRichText(face)
//rt.WriteString("mm\u200bmm \r\nmm")
//text = rt.ToText(30.0, 50.0, Left, Top, 0.0, 0.0) // wrap at word break
//test.T(t, len(text.lines), 3)
//test.T(t, text.lines[0].spans[0].Text, "mm-")
//rt = NewRichText(face)
//rt.WriteString("\u200bmm")
//text = rt.ToText(20.0, 50.0, Left, Top, 0.0, 0.0) // wrap at space
//test.T(t, len(text.lines), 1)
}
func TestRichText2(t *testing.T) {
family := NewFontFamily("dejavu-serif")
if err := family.LoadFontFile("resources/DejaVuSerif.ttf", FontRegular); err != nil {
test.Error(t, err)
}
pt := ptPerMm * float64(family.fonts[FontRegular].Head.UnitsPerEm)
face := family.Face(pt, Black, FontRegular, FontNormal) // line height is 13.96875
rt := NewRichText(face)
rt.WriteString(" a")
rt.ToText(100.0, 100.0, Left, Top, 0.0, 0.0)
}
func TestTextBounds(t *testing.T) {
family := NewFontFamily("dejavu-serif")
if err := family.LoadFontFile("resources/DejaVuSerif.ttf", FontRegular); err != nil {
test.Error(t, err)
}
pt := ptPerMm * float64(family.fonts[FontRegular].Head.UnitsPerEm)
face8 := family.Face(pt, Black, FontRegular, FontNormal, FontUnderline)
face12 := family.Face(1.5*pt, Black, FontRegular, FontNormal, FontUnderline)
rt := NewRichText(face8)
rt.WriteString("test")
rt.WriteFace(face12, "test")
text := rt.ToText(4096.0, 4096.0, Left, Top, 0.0, 0.0)
top, ascent, descent, bottom := text.lines[0].Heights(0.0)
test.Float(t, top, 1901*1.5)
test.Float(t, ascent, 1901*1.5)
test.Float(t, descent, 483*1.5)
test.Float(t, bottom, 483*1.5)
ascent, descent = text.Heights()
test.Float(t, ascent, 0.0)
test.Float(t, descent, face12.Metrics().LineHeight)
bounds := text.Bounds()
test.Float(t, bounds.X, 0.0)
test.Float(t, bounds.Y, -(1901+483)*1.5)
test.Float(t, bounds.W, face8.TextWidth("test")+face12.TextWidth("test"))
test.Float(t, bounds.H, (1901+483)*1.5)
//bounds = text.OutlineBounds()
//test.Float(t, bounds.X, 0.0)
//test.Float(t, bounds.Y, -13.390625)
//test.Float(t, bounds.W, face8.TextWidth("test")+face12.TextWidth("test"))
//test.Float(t, bounds.H, 10.40625)
}
func TestTextBox(t *testing.T) {
c := New(100, 100)
ctx := NewContext(c)
font, err := LoadFontFile("resources/DejaVuSerif.ttf", FontRegular)
if err != nil {
t.Fatal(err)
}
face := font.Face(12, Black)
ctx.DrawText(0, 0, NewTextBox(face, "\ntext", 100, 100, Left, Top, 0, 0))
ctx.DrawText(0, 0, NewTextBox(face, "text\n\ntext2", 100, 100, Left, Top, 0, 0))
}