mirror of
git://git.sv.gnu.org/emacs.git
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120 lines
3.2 KiB
Java
120 lines
3.2 KiB
Java
/* Font backend for Android terminals. -*- c-file-style: "GNU" -*-
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Copyright (C) 2023-2025 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at
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your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
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package org.gnu.emacs;
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import android.graphics.Paint;
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import android.graphics.Rect;
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public final class EmacsSdk23FontDriver extends EmacsSdk7FontDriver
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{
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private void
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textExtents1 (Sdk7FontObject font, int code, FontMetrics metrics,
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Paint paint, Rect bounds)
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{
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char[] text;
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text = new char[2];
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text[0] = (char) code;
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text[1] = 'c';
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paint.getTextBounds (text, 0, 1, bounds);
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metrics.lbearing = (short) bounds.left;
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metrics.rbearing = (short) bounds.right;
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metrics.ascent = (short) -bounds.top;
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metrics.descent = (short) bounds.bottom;
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metrics.width
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= (short) paint.getRunAdvance (text, 0, 1, 0, 1, false, 1);
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}
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@Override
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public void
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textExtents (FontObject font, int code[], FontMetrics fontMetrics)
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{
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int i;
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Paint paintCache;
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Rect boundsCache;
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Sdk7FontObject fontObject;
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char[] text;
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float width;
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fontObject = (Sdk7FontObject) font;
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paintCache = fontObject.typeface.typefacePaint;
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paintCache.setTextSize (fontObject.pixelSize);
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boundsCache = new Rect ();
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if (code.length == 0)
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{
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fontMetrics.lbearing = 0;
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fontMetrics.rbearing = 0;
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fontMetrics.ascent = 0;
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fontMetrics.descent = 0;
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fontMetrics.width = 0;
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}
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else if (code.length == 1)
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textExtents1 ((Sdk7FontObject) font, code[0], fontMetrics,
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paintCache, boundsCache);
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else
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{
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text = new char[code.length + 1];
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for (i = 0; i < code.length; ++i)
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text[i] = (char) code[i];
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text[code.length] = 'c';
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paintCache.getTextBounds (text, 0, code.length,
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boundsCache);
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width = paintCache.getRunAdvance (text, 0, code.length, 0,
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code.length,
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false, code.length);
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fontMetrics.lbearing = (short) boundsCache.left;
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fontMetrics.rbearing = (short) boundsCache.right;
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fontMetrics.ascent = (short) -boundsCache.top;
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fontMetrics.descent = (short) boundsCache.bottom;
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fontMetrics.width = (short) width;
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}
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}
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@Override
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public int
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hasChar (FontSpec font, int charCode)
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{
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Sdk7FontObject fontObject;
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Paint paint;
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if (font instanceof Sdk7FontObject)
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{
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fontObject = (Sdk7FontObject) font;
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paint = fontObject.typeface.typefacePaint;
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}
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else
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paint = ((Sdk7FontEntity) font).typeface.typefacePaint;
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/* If the character falls within the confines of the BMP, return
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1. */
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if (charCode < 65536)
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return paint.hasGlyph (String.valueOf ((char) charCode)) ? 1 : 0;
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/* Otherwise return 0. */
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return 0;
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}
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};
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