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/* Font backend for Android terminals. -*- c-file-style: "GNU" -*-
Copyright (C) 2023-2024 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
package org.gnu.emacs;
import android.graphics.Paint;
import android.graphics.Rect;
public final class EmacsSdk23FontDriver extends EmacsSdk7FontDriver
{
private void
textExtents1 (Sdk7FontObject font, int code, FontMetrics metrics,
Paint paint, Rect bounds)
{
char[] text;
text = new char[2];
text[0] = (char) code;
text[1] = 'c';
paint.getTextBounds (text, 0, 1, bounds);
metrics.lbearing = (short) bounds.left;
metrics.rbearing = (short) bounds.right;
metrics.ascent = (short) -bounds.top;
metrics.descent = (short) bounds.bottom;
metrics.width
= (short) paint.getRunAdvance (text, 0, 1, 0, 1, false, 1);
}
@Override
public void
textExtents (FontObject font, int code[], FontMetrics fontMetrics)
{
int i;
Paint paintCache;
Rect boundsCache;
Sdk7FontObject fontObject;
char[] text;
float width;
fontObject = (Sdk7FontObject) font;
paintCache = fontObject.typeface.typefacePaint;
paintCache.setTextSize (fontObject.pixelSize);
boundsCache = new Rect ();
if (code.length == 0)
{
fontMetrics.lbearing = 0;
fontMetrics.rbearing = 0;
fontMetrics.ascent = 0;
fontMetrics.descent = 0;
fontMetrics.width = 0;
}
else if (code.length == 1)
textExtents1 ((Sdk7FontObject) font, code[0], fontMetrics,
paintCache, boundsCache);
else
{
text = new char[code.length + 1];
for (i = 0; i < code.length; ++i)
text[i] = (char) code[i];
text[code.length] = 'c';
paintCache.getTextBounds (text, 0, code.length,
boundsCache);
width = paintCache.getRunAdvance (text, 0, code.length, 0,
code.length,
false, code.length);
fontMetrics.lbearing = (short) boundsCache.left;
fontMetrics.rbearing = (short) boundsCache.right;
fontMetrics.ascent = (short) -boundsCache.top;
fontMetrics.descent = (short) boundsCache.bottom;
fontMetrics.width = (short) width;
}
}
@Override
public int
hasChar (FontSpec font, int charCode)
{
Sdk7FontObject fontObject;
Paint paint;
if (font instanceof Sdk7FontObject)
{
fontObject = (Sdk7FontObject) font;
paint = fontObject.typeface.typefacePaint;
}
else
paint = ((Sdk7FontEntity) font).typeface.typefacePaint;
/* If the character falls within the confines of the BMP, return
1. */
if (charCode < 65536)
return paint.hasGlyph (String.valueOf ((char) charCode)) ? 1 : 0;
/* Otherwise return 0. */
return 0;
}
};
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