forked from extern/Unexpected-Keyboard
318 lines
9.0 KiB
Java
318 lines
9.0 KiB
Java
package juloo.keyboard2;
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import android.content.res.Resources;
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import android.content.res.XmlResourceParser;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.function.Function;
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class KeyboardData
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{
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public final List<Row> rows;
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/* Total width of the keyboard. Unit is abstract. */
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public final float keysWidth;
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/* Total height of the keyboard. Unit is abstract. */
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public final float keysHeight;
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public KeyboardData replaceKeys(MapKeys f)
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{
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ArrayList<Row> rows_ = new ArrayList<Row>();
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for (Row r : rows)
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rows_.add(r.replaceKeys(f));
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return new KeyboardData(rows_, keysWidth);
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}
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private static Row _bottomRow = null;
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private static Map<Integer, KeyboardData> _layoutCache = new HashMap<Integer, KeyboardData>();
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public static KeyboardData load(Resources res, int id)
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{
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KeyboardData l = _layoutCache.get(id);
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if (l == null)
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{
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try
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{
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if (_bottomRow == null)
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_bottomRow = parse_bottom_row(res.getXml(R.xml.bottom_row));
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l = parse_keyboard(res.getXml(id));
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_layoutCache.put(id, l);
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}
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catch (Exception e)
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{
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e.printStackTrace();
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}
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}
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return l;
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}
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private static KeyboardData parse_keyboard(XmlResourceParser parser) throws Exception
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{
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if (!expect_tag(parser, "keyboard"))
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throw new Exception("Empty layout file");
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boolean bottom_row = parser.getAttributeBooleanValue(null, "bottom_row", true);
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ArrayList<Row> rows = new ArrayList<Row>();
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while (expect_tag(parser, "row"))
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rows.add(Row.parse(parser));
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float kw = compute_max_width(rows);
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if (bottom_row)
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rows.add(_bottomRow.updateWidth(kw));
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return new KeyboardData(rows, kw);
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}
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private static float compute_max_width(List<Row> rows)
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{
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float w = 0.f;
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for (Row r : rows)
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w = Math.max(w, r.keysWidth);
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return w;
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}
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private static Row parse_bottom_row(XmlResourceParser parser) throws Exception
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{
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if (!expect_tag(parser, "row"))
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throw new Exception("Failed to parse bottom row");
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return Row.parse(parser);
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}
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protected KeyboardData(List<Row> rows_, float kw)
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{
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float kh = 0.f;
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for (Row r : rows_)
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kh += r.height + r.shift;
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rows = rows_;
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keysWidth = kw;
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keysHeight = kh;
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}
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public static class Row
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{
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public final List<Key> keys;
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/* Height of the row, without 'shift'. Unit is abstract. */
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public final float height;
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/* Extra empty space on the top. */
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public final float shift;
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/* Total width of the row. Unit is abstract. */
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private final float keysWidth;
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protected Row(List<Key> keys_, float h, float s)
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{
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float kw = 0.f;
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for (Key k : keys_) kw += k.width + k.shift;
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keys = keys_;
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height = h;
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shift = s;
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keysWidth = kw;
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}
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public static Row parse(XmlResourceParser parser) throws Exception
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{
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ArrayList<Key> keys = new ArrayList<Key>();
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int status;
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float h = parser.getAttributeFloatValue(null, "height", 1f);
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float shift = parser.getAttributeFloatValue(null, "shift", 0f);
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while (expect_tag(parser, "key"))
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keys.add(Key.parse(parser));
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return new Row(keys, h, shift);
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}
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public Row replaceKeys(MapKeys f)
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{
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ArrayList<Key> keys_ = new ArrayList<Key>();
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for (Key k : keys)
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keys_.add(k.replaceKeys(f));
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return new Row(keys_, height, shift);
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}
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/** Change the width of every keys so that the row is 's' units wide. */
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public Row updateWidth(float newWidth)
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{
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float s = newWidth / keysWidth;
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ArrayList<Key> keys_ = new ArrayList<Key>();
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for (Key k : keys)
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keys_.add(k.scaleWidth(s));
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return new Row(keys_, height, shift);
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}
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}
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public static class Key
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{
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/*
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** 1 2
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** 0
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** 3 4
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*/
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public final KeyValue key0;
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public final KeyValue key1;
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public final KeyValue key2;
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public final KeyValue key3;
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public final KeyValue key4;
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/* Key width in relative unit. */
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public final float width;
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/* Extra empty space on the left of the key. */
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public final float shift;
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/* Put keys 1 to 4 on the edges instead of the corners. */
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public final boolean edgekeys;
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protected Key(KeyValue k0, KeyValue k1, KeyValue k2, KeyValue k3, KeyValue k4, float w, float s, boolean e)
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{
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key0 = k0;
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key1 = k1;
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key2 = k2;
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key3 = k3;
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key4 = k4;
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width = w;
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shift = s;
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edgekeys = e;
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}
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public static Key parse(XmlResourceParser parser) throws Exception
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{
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KeyValue k0 = KeyValue.getKeyByName(parser.getAttributeValue(null, "key0"));
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KeyValue k1 = KeyValue.getKeyByName(parser.getAttributeValue(null, "key1"));
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KeyValue k2 = KeyValue.getKeyByName(parser.getAttributeValue(null, "key2"));
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KeyValue k3 = KeyValue.getKeyByName(parser.getAttributeValue(null, "key3"));
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KeyValue k4 = KeyValue.getKeyByName(parser.getAttributeValue(null, "key4"));
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float width = parser.getAttributeFloatValue(null, "width", 1f);
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float shift = parser.getAttributeFloatValue(null, "shift", 0.f);
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boolean edgekeys = parser.getAttributeBooleanValue(null, "edgekeys", false);
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while (parser.next() != XmlResourceParser.END_TAG)
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continue ;
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return new Key(k0, k1, k2, k3, k4, width, shift, edgekeys);
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}
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public Key replaceKeys(MapKeys f)
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{
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return new Key(f.apply(key0), f.apply(key1), f.apply(key2),
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f.apply(key3), f.apply(key4), width, shift, edgekeys);
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}
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/** New key with the width multiplied by 's'. */
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public Key scaleWidth(float s)
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{
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return new Key(key0, key1, key2, key3, key4, width * s, shift, edgekeys);
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}
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public KeyValue getValue(int index)
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{
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if (index == 0 || index > 8) return key0;
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KeyValue key = null;
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if (edgekeys) {
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// \ 1 /
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// \ /
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// 3 0 2
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// / \
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// / 4 \
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// first closer
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switch (index)
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{
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case 2: case 3: key = key1; break;
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case 4: case 8: key = key2; break;
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case 1: case 5: key = key3; break;
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case 6: case 7: key = key4; break;
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}
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if (key != null) return key;
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// second closer
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switch (index)
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{
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case 1: case 4: key = key1; break;
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case 3: case 7: key = key2; break;
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case 2: case 6: key = key3; break;
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case 5: case 8: key = key4; break;
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}
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if (key != null) return key;
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// third closer
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switch (index)
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{
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case 5: case 8: key = key1; break;
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case 2: case 6: key = key2; break;
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case 3: case 7: key = key3; break;
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case 1: case 4: key = key4; break;
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}
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if (key != null) return key;
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// fourth closer
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switch (index)
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{
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case 6: case 7: key = key1; break;
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case 1: case 5: key = key2; break;
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case 4: case 8: key = key3; break;
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case 2: case 3: key = key4; break;
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}
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if (key != null) return key;
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}
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else
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{
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// 1 | 2
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// |
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// --0--
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// |
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// 3 | 4
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// first closer
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switch (index)
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{
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case 1: case 2: key = key1; break;
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case 3: case 4: key = key2; break;
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case 5: case 6: key = key3; break;
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case 7: case 8: key = key4; break;
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}
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if (key != null) return key;
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// second closer
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switch (index)
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{
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case 3: case 5: key = key1; break;
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case 2: case 8: key = key2; break;
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case 1: case 7: key = key3; break;
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case 4: case 6: key = key4; break;
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}
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if (key != null) return key;
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// third closer
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switch (index)
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{
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case 4: case 6: key = key1; break;
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case 1: case 7: key = key2; break;
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case 2: case 8: key = key3; break;
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case 3: case 5: key = key4; break;
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}
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if (key != null) return key;
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// fourth closer
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switch (index)
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{
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case 7: case 8: key = key1; break;
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case 3: case 4: key = key2; break;
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case 5: case 6: key = key3; break;
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case 1: case 2: key = key4; break;
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}
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if (key != null) return key;
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}
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return key0;
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}
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}
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// Not using Function<KeyValue, KeyValue> to keep compatibility with Android 6.
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public static abstract interface MapKeys {
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public KeyValue apply(KeyValue kv);
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}
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/** Parsing utils */
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/** Returns [false] on [END_DOCUMENT] or [END_TAG], [true] otherwise. */
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private static boolean expect_tag(XmlResourceParser parser, String name) throws Exception
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{
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int status;
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do
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{
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status = parser.next();
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if (status == XmlResourceParser.END_DOCUMENT || status == XmlResourceParser.END_TAG)
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return false;
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}
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while (status != XmlResourceParser.START_TAG);
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if (!parser.getName().equals(name))
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throw new Exception("Unknow tag: " + parser.getName());
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return true;
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}
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}
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