StaticLayoutTestpublic class StaticLayoutTest extends TestCase | Tests StaticLayout vertical metrics behavior.
Requires disabling access checks in the vm since this calls package-private
APIs. |
| Methods Summary |
|---|
| private void | assertLineMetrics(Layout l, int line, int top, int ascent, int descent, int height)
String info = "line " + line;
assertEquals(info, top, l.getLineTop(line));
assertEquals(info, ascent, l.getLineAscent(line));
assertEquals(info, descent, l.getLineDescent(line));
assertEquals(info, height, l.getLineBottom(line) - top);
| | private void | assertLinesMetrics(Layout l, int values)
// sanity check
if ((values.length & 0x1) != 0) {
throw new IllegalArgumentException(String.valueOf(values.length));
}
int lines = values.length >> 1;
assertEquals(lines, l.getLineCount());
int t = 0;
for (int i = 0, n = 0; i < lines; ++i, n += 2) {
int a = values[n];
int d = values[n+1];
int h = -a + d;
assertLineMetrics(l, i, t, a, d, h);
t += h;
}
assertEquals(t, l.getHeight());
| | private void | assertTopBotPadding(Layout l, int topPad, int botPad)
assertEquals(topPad, l.getTopPadding());
assertEquals(botPad, l.getBottomPadding());
| | private void | assertVertMetrics(Layout l, int topPad, int botPad, int values)
assertTopBotPadding(l, topPad, botPad);
assertLinesMetrics(l, values);
| | static android.text.StaticLayoutTest$LayoutBuilder | builder()
return new LayoutBuilder();
| | public void | testGetters1()Basic test showing expected behavior and relationship between font
metrics and line metrics.
LayoutBuilder b = builder();
FontMetricsInt fmi = b.paint.getFontMetricsInt();
// check default paint
Log.i("TG1:paint", fmi.toString());
Layout l = b.build();
assertVertMetrics(l, 0, 0,
fmi.ascent, fmi.descent);
// other quick metrics
assertEquals(0, l.getLineStart(0));
assertEquals(Layout.DIR_LEFT_TO_RIGHT, l.getParagraphDirection(0));
assertEquals(false, l.getLineContainsTab(0));
assertEquals(Layout.DIRS_ALL_LEFT_TO_RIGHT, l.getLineDirections(0));
assertEquals(0, l.getEllipsisCount(0));
assertEquals(0, l.getEllipsisStart(0));
assertEquals(b.width, l.getEllipsizedWidth());
| | public void | testGetters2()Basic test showing effect of includePad = true with 1 line.
Top and bottom padding are affected, as is the line descent and height.
LayoutBuilder b = builder()
.setIncludePad(true);
FontMetricsInt fmi = b.paint.getFontMetricsInt();
Layout l = b.build();
assertVertMetrics(l, fmi.top - fmi.ascent, fmi.bottom - fmi.descent,
fmi.top, fmi.bottom);
| | public void | testGetters3()Basic test showing effect of includePad = true wrapping to 2 lines.
Ascent of top line and descent of bottom line are affected.
LayoutBuilder b = builder()
.setIncludePad(true)
.setWidth(50);
FontMetricsInt fmi = b.paint.getFontMetricsInt();
Layout l = b.build();
assertVertMetrics(l, fmi.top - fmi.ascent, fmi.bottom - fmi.descent,
fmi.top, fmi.descent,
fmi.ascent, fmi.bottom);
| | public void | testGetters4()Basic test showing effect of includePad = true wrapping to 3 lines.
First line ascent is top, bottom line descent is bottom.
LayoutBuilder b = builder()
.setText("This is a longer test")
.setIncludePad(true)
.setWidth(50);
FontMetricsInt fmi = b.paint.getFontMetricsInt();
Layout l = b.build();
assertVertMetrics(l, fmi.top - fmi.ascent, fmi.bottom - fmi.descent,
fmi.top, fmi.descent,
fmi.ascent, fmi.descent,
fmi.ascent, fmi.bottom);
| | public void | testGetters5()Basic test showing effect of includePad = true wrapping to 3 lines and
large text. See effect of leading. Currently, we don't expect there to
even be non-zero leading.
LayoutBuilder b = builder()
.setText("This is a longer test")
.setIncludePad(true)
.setWidth(150);
b.paint.setTextSize(36);
FontMetricsInt fmi = b.paint.getFontMetricsInt();
if (fmi.leading == 0) { // nothing to test
Log.i("TG5", "leading is 0, skipping test");
return;
}
// So far, leading is not used, so this is the same as TG4. If we start
// using leading, this will fail.
Layout l = b.build();
assertVertMetrics(l, fmi.top - fmi.ascent, fmi.bottom - fmi.descent,
fmi.top, fmi.descent,
fmi.ascent, fmi.descent,
fmi.ascent, fmi.bottom);
| | public void | testGetters6()Basic test showing effect of includePad = true, spacingAdd = 2, wrapping
to 3 lines.
int spacingAdd = 2; // int so expressions return int
LayoutBuilder b = builder()
.setText("This is a longer test")
.setIncludePad(true)
.setWidth(50)
.setSpacingAdd(spacingAdd);
FontMetricsInt fmi = b.paint.getFontMetricsInt();
Layout l = b.build();
assertVertMetrics(l, fmi.top - fmi.ascent, fmi.bottom - fmi.descent,
fmi.top, fmi.descent + spacingAdd,
fmi.ascent, fmi.descent + spacingAdd,
fmi.ascent, fmi.bottom + spacingAdd);
| | public void | testGetters7()Basic test showing effect of includePad = true, spacingAdd = 2,
spacingMult = 1.5, wrapping to 3 lines.
LayoutBuilder b = builder()
.setText("This is a longer test")
.setIncludePad(true)
.setWidth(50)
.setSpacingAdd(2)
.setSpacingMult(1.5f);
FontMetricsInt fmi = b.paint.getFontMetricsInt();
Scaler s = new Scaler(b.spacingMult, b.spacingAdd);
Layout l = b.build();
assertVertMetrics(l, fmi.top - fmi.ascent, fmi.bottom - fmi.descent,
fmi.top, fmi.descent + s.scale(fmi.descent - fmi.top),
fmi.ascent, fmi.descent + s.scale(fmi.descent - fmi.ascent),
fmi.ascent, fmi.bottom + s.scale(fmi.bottom - fmi.ascent));
| | public void | testGetters8()Basic test showing effect of includePad = true, spacingAdd = 0,
spacingMult = 0.8 when wrapping to 3 lines.
LayoutBuilder b = builder()
.setText("This is a longer test")
.setIncludePad(true)
.setWidth(50)
.setSpacingAdd(2)
.setSpacingMult(.8f);
FontMetricsInt fmi = b.paint.getFontMetricsInt();
Scaler s = new Scaler(b.spacingMult, b.spacingAdd);
Layout l = b.build();
assertVertMetrics(l, fmi.top - fmi.ascent, fmi.bottom - fmi.descent,
fmi.top, fmi.descent + s.scale(fmi.descent - fmi.top),
fmi.ascent, fmi.descent + s.scale(fmi.descent - fmi.ascent),
fmi.ascent, fmi.bottom + s.scale(fmi.bottom - fmi.ascent));
|
|
