mirror of
https://github.com/Julow/Unexpected-Keyboard.git
synced 2024-11-30 03:03:18 +01:00
700 lines
21 KiB
Java
700 lines
21 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 android.util.Xml;
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import java.io.StringReader;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.function.Function;
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import org.xmlpull.v1.XmlPullParser;
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public final class KeyboardData
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{
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public final List<Row> rows;
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/** Total width of the keyboard. */
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public final float keysWidth;
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/** Total height of the keyboard. */
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public final float keysHeight;
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/** Might be null. */
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public final Modmap modmap;
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/** Might be null. */
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public final String script;
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/** Might be different from [script]. Might be null. */
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public final String numpad_script;
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/** The [name] attribute. Might be null. */
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public final String name;
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/** Whether the bottom row should be added. */
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public final boolean bottom_row;
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/** Position of every keys on the layout, see [getKeys()]. */
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private Map<KeyValue, KeyPos> _key_pos = null;
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public KeyboardData mapKeys(MapKey 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.mapKeys(f));
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return new KeyboardData(this, rows_);
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}
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/** Add keys from the given iterator into the keyboard. Preferred position is
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specified via [PreferredPos]. */
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public KeyboardData addExtraKeys(Iterator<Map.Entry<KeyValue, PreferredPos>> extra_keys)
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{
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/* Keys that couldn't be placed at their preferred position. */
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ArrayList<KeyValue> unplaced_keys = new ArrayList<KeyValue>();
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ArrayList<Row> rows = new ArrayList<Row>(this.rows);
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while (extra_keys.hasNext())
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{
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Map.Entry<KeyValue, PreferredPos> kp = extra_keys.next();
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if (!add_key_to_preferred_pos(rows, kp.getKey(), kp.getValue()))
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unplaced_keys.add(kp.getKey());
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}
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for (KeyValue kv : unplaced_keys)
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add_key_to_preferred_pos(rows, kv, PreferredPos.ANYWHERE);
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return new KeyboardData(this, rows);
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}
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/** Place a key on the keyboard according to its preferred position. Mutates
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[rows]. Returns [false] if it couldn't be placed. */
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boolean add_key_to_preferred_pos(List<Row> rows, KeyValue kv, PreferredPos pos)
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{
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if (pos.next_to != null)
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{
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KeyPos next_to_pos = getKeys().get(pos.next_to);
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if (next_to_pos != null
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&& add_key_to_pos(rows, kv, next_to_pos.with_dir(-1)))
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return true;
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}
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for (KeyPos p : pos.positions)
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if (add_key_to_pos(rows, kv, p))
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return true;
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return false;
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}
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/** Place a key on the keyboard. A value of [-1] in one of the coordinate
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means that the key can be placed anywhere in that coordinate, see
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[PreferredPos]. Mutates [rows]. Returns [false] if it couldn't be placed.
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*/
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boolean add_key_to_pos(List<Row> rows, KeyValue kv, KeyPos p)
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{
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int i_row = p.row;
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int i_row_end = Math.min(p.row, rows.size() - 1);
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if (p.row == -1) { i_row = 0; i_row_end = rows.size() - 1; }
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for (; i_row <= i_row_end; i_row++)
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{
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Row row = rows.get(i_row);
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int i_col = p.col;
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int i_col_end = p.col;
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if (p.col == -1) { i_col = 0; i_col_end = row.keys.size() - 1; }
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for (; i_col <= i_col_end; i_col++)
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{
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Key col = row.keys.get(i_col);
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int i_dir = p.dir;
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int i_dir_end = p.dir;
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if (p.dir == -1) { i_dir = 1; i_dir_end = 4; }
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for (; i_dir <= i_dir_end; i_dir++)
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{
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if (col.getKeyValue(i_dir) == null)
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{
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row.keys.set(i_col, col.withKeyValue(i_dir, kv));
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return true;
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}
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}
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}
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}
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return false;
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}
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public KeyboardData addNumPad(KeyboardData num_pad)
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{
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ArrayList<Row> extendedRows = new ArrayList<Row>();
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Iterator<Row> iterNumPadRows = num_pad.rows.iterator();
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for (Row row : rows)
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{
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ArrayList<KeyboardData.Key> keys = new ArrayList<Key>(row.keys);
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if (iterNumPadRows.hasNext())
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{
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Row numPadRow = iterNumPadRows.next();
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List<Key> nps = numPadRow.keys;
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if (nps.size() > 0) {
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float firstNumPadShift = 0.5f + keysWidth - row.keysWidth;
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keys.add(nps.get(0).withShift(firstNumPadShift));
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for (int i = 1; i < nps.size(); i++)
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keys.add(nps.get(i));
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}
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}
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extendedRows.add(new Row(keys, row.height, row.shift));
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}
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return new KeyboardData(this, extendedRows);
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}
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/** Insert the given row at the given indice. The row is scaled so that the
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keys already on the keyboard don't change width. */
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public KeyboardData insert_row(Row row, int i)
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{
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ArrayList<Row> rows_ = new ArrayList<Row>(this.rows);
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rows_.add(i, row.updateWidth(keysWidth));
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return new KeyboardData(this, rows_);
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}
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public Key findKeyWithValue(KeyValue kv)
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{
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KeyPos pos = getKeys().get(kv);
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if (pos == null || pos.row >= rows.size())
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return null;
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return rows.get(pos.row).get_key_at_pos(pos);
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}
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/** This is computed once and cached. */
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public Map<KeyValue, KeyPos> getKeys()
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{
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if (_key_pos == null)
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{
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_key_pos = new HashMap<KeyValue, KeyPos>();
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for (int r = 0; r < rows.size(); r++)
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rows.get(r).getKeys(_key_pos, r);
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}
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return _key_pos;
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}
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private static Map<Integer, KeyboardData> _layoutCache = new HashMap<Integer, KeyboardData>();
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public static Row load_bottom_row(Resources res) throws Exception
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{
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return parse_row(res.getXml(R.xml.bottom_row));
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}
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public static Row load_number_row(Resources res) throws Exception
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{
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return parse_row(res.getXml(R.xml.number_row));
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}
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public static KeyboardData load_num_pad(Resources res) throws Exception
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{
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return parse_keyboard(res.getXml(R.xml.numpad));
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}
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/** Load a layout from a resource ID. Returns [null] on error. */
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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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XmlResourceParser parser = res.getXml(id);
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l = parse_keyboard(parser);
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parser.close();
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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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/** Load a layout from a string. Returns [null] on error. */
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public static KeyboardData load_string(String src)
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{
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try
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{
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return load_string_exn(src);
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}
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catch (Exception e)
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{
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return null;
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}
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}
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/** Like [load_string] but throws an exception on error and do not return
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[null]. */
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public static KeyboardData load_string_exn(String src) throws Exception
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{
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XmlPullParser parser = Xml.newPullParser();
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parser.setInput(new StringReader(src));
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return parse_keyboard(parser);
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}
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private static KeyboardData parse_keyboard(XmlPullParser parser) throws Exception
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{
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if (!expect_tag(parser, "keyboard"))
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throw error(parser, "Expected tag <keyboard>");
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boolean bottom_row = attribute_bool(parser, "bottom_row", true);
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float specified_kw = attribute_float(parser, "width", 0f);
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String script = parser.getAttributeValue(null, "script");
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String numpad_script = parser.getAttributeValue(null, "numpad_script");
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if (numpad_script == null)
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numpad_script = script;
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String name = parser.getAttributeValue(null, "name");
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ArrayList<Row> rows = new ArrayList<Row>();
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Modmap modmap = null;
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while (next_tag(parser))
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{
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switch (parser.getName())
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{
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case "row":
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rows.add(Row.parse(parser));
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break;
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case "modmap":
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modmap = Modmap.parse(parser);
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break;
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default:
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throw error(parser, "Expecting tag <row>, got <" + parser.getName() + ">");
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}
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}
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float kw = (specified_kw != 0f) ? specified_kw : compute_max_width(rows);
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return new KeyboardData(rows, kw, modmap, script, numpad_script, name, bottom_row);
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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_row(XmlPullParser parser) throws Exception
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{
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if (!expect_tag(parser, "row"))
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throw error(parser, "Expected tag <row>");
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return Row.parse(parser);
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}
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protected KeyboardData(List<Row> rows_, float kw, Modmap mm, String sc,
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String npsc, String name_, boolean bottom_row_)
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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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modmap = mm;
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script = sc;
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numpad_script = npsc;
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name = name_;
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keysWidth = kw;
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keysHeight = kh;
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bottom_row = bottom_row_;
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}
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/** Copies the fields of an other keyboard, with rows changed. */
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protected KeyboardData(KeyboardData src, List<Row> rows)
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{
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this(rows, compute_max_width(rows), src.modmap, src.script,
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src.numpad_script, src.name, src.bottom_row);
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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'. */
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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. */
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public 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(XmlPullParser 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 = attribute_float(parser, "height", 1f);
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float shift = attribute_float(parser, "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 copy()
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{
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return new Row(new ArrayList<Key>(keys), height, shift);
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}
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public void getKeys(Map<KeyValue, KeyPos> dst, int row)
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{
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for (int c = 0; c < keys.size(); c++)
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keys.get(c).getKeys(dst, row, c);
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}
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public Map<KeyValue, KeyPos> getKeys(int row)
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{
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Map<KeyValue, KeyPos> dst = new HashMap<KeyValue, KeyPos>();
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getKeys(dst, row);
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return dst;
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}
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public Row mapKeys(MapKey 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(f.apply(k));
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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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final float s = newWidth / keysWidth;
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return mapKeys(new MapKey(){
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public Key apply(Key k) { return k.scaleWidth(s); }
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});
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}
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public Key get_key_at_pos(KeyPos pos)
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{
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if (pos.col >= keys.size())
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return null;
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return keys.get(pos.col);
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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 7 2
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* 5 0 6
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* 3 8 4
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*/
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public final KeyValue[] keys;
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/** Key accessed by the anti-clockwise circle gesture. */
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public final KeyValue anticircle;
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/** Pack flags for every key values. Flags are: [F_LOC]. */
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private final int keysflags;
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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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/** Keys 2 and 3 are repeated as the finger moves laterally on the key.
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Used for the left and right arrow keys on the space bar. */
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public final boolean slider;
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/** String printed on the keys. It has no other effect. */
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public final String indication;
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/** Whether a key was declared with the 'loc' prefix. */
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public static final int F_LOC = 1;
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public static final int ALL_FLAGS = F_LOC;
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protected Key(KeyValue[] ks, KeyValue antic, int f, float w, float s, boolean sl, String i)
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{
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keys = ks;
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anticircle = antic;
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keysflags = f;
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width = w;
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shift = s;
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slider = sl;
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indication = i;
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}
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/** Read a key value attribute that have a synonym. Having both synonyms
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present at the same time is an error.
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Returns [null] if the attributes are not present. */
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static String get_key_attr(XmlPullParser parser, String syn1, String syn2)
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throws Exception
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{
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String name1 = parser.getAttributeValue(null, syn1);
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String name2 = parser.getAttributeValue(null, syn2);
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if (name1 != null && name2 != null)
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throw error(parser,
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"'"+syn1+"' and '"+syn2+"' are synonyms and cannot be passed at the same time.");
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return (name1 == null) ? name2 : name1;
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}
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/** Parse the key description [key_attr] and write into [ks] at [index].
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Returns flags that can be aggregated into the value for [keysflags].
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[key_attr] can be [null] for convenience. */
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static int parse_key_attr(XmlPullParser parser, String key_val, KeyValue[] ks,
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int index)
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throws Exception
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{
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if (key_val == null)
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return 0;
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int flags = 0;
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String name_loc = stripPrefix(key_val, "loc ");
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if (name_loc != null)
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{
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flags |= F_LOC;
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key_val = name_loc;
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}
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ks[index] = KeyValue.getKeyByName(key_val);
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return (flags << index);
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}
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static KeyValue parse_nonloc_key_attr(XmlPullParser parser, String attr_name) throws Exception
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{
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String name = parser.getAttributeValue(null, attr_name);
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if (name == null)
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return null;
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return KeyValue.getKeyByName(name);
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}
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static String stripPrefix(String s, String prefix)
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{
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return s.startsWith(prefix) ? s.substring(prefix.length()) : null;
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}
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public static Key parse(XmlPullParser parser) throws Exception
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{
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KeyValue[] ks = new KeyValue[9];
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int keysflags = 0;
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keysflags |= parse_key_attr(parser, parser.getAttributeValue(null, "key0"), ks, 0);
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/* Swipe gestures (key1-key8 diagram above), with compass-point synonyms. */
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keysflags |= parse_key_attr(parser, get_key_attr(parser, "key1", "nw"), ks, 1);
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keysflags |= parse_key_attr(parser, get_key_attr(parser, "key2", "ne"), ks, 2);
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keysflags |= parse_key_attr(parser, get_key_attr(parser, "key3", "sw"), ks, 3);
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keysflags |= parse_key_attr(parser, get_key_attr(parser, "key4", "se"), ks, 4);
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keysflags |= parse_key_attr(parser, get_key_attr(parser, "key5", "w"), ks, 5);
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keysflags |= parse_key_attr(parser, get_key_attr(parser, "key6", "e"), ks, 6);
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keysflags |= parse_key_attr(parser, get_key_attr(parser, "key7", "n"), ks, 7);
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keysflags |= parse_key_attr(parser, get_key_attr(parser, "key8", "s"), ks, 8);
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/* Other key attributes */
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KeyValue anticircle = parse_nonloc_key_attr(parser, "anticircle");
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float width = attribute_float(parser, "width", 1f);
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float shift = attribute_float(parser, "shift", 0.f);
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boolean slider = attribute_bool(parser, "slider", false);
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String indication = parser.getAttributeValue(null, "indication");
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while (parser.next() != XmlPullParser.END_TAG)
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continue;
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return new Key(ks, anticircle, keysflags, width, shift, slider, indication);
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}
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/** Whether key at [index] as [flag]. */
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public boolean keyHasFlag(int index, int flag)
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{
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return (keysflags & (flag << index)) != 0;
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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(keys, anticircle, keysflags, width * s, shift, slider,
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indication);
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}
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public void getKeys(Map<KeyValue, KeyPos> dst, int row, int col)
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{
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for (int i = 0; i < keys.length; i++)
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if (keys[i] != null)
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dst.put(keys[i], new KeyPos(row, col, i));
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}
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public KeyValue getKeyValue(int i)
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{
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return keys[i];
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}
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public Key withKeyValue(int i, KeyValue kv)
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{
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KeyValue[] ks = new KeyValue[keys.length];
|
|
for (int j = 0; j < keys.length; j++) ks[j] = keys[j];
|
|
ks[i] = kv;
|
|
int flags = (keysflags & ~(ALL_FLAGS << i));
|
|
return new Key(ks, anticircle, flags, width, shift, slider, indication);
|
|
}
|
|
|
|
public Key withShift(float s)
|
|
{
|
|
return new Key(keys, anticircle, keysflags, width, s, slider, indication);
|
|
}
|
|
|
|
public boolean hasValue(KeyValue kv)
|
|
{
|
|
for (int i = 0; i < keys.length; i++)
|
|
if (keys[i] != null && keys[i].equals(kv))
|
|
return true;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Not using Function<KeyValue, KeyValue> to keep compatibility with Android 6.
|
|
public static abstract interface MapKey {
|
|
public Key apply(Key k);
|
|
}
|
|
|
|
public static abstract class MapKeyValues implements MapKey {
|
|
abstract public KeyValue apply(KeyValue c, boolean localized);
|
|
|
|
public Key apply(Key k)
|
|
{
|
|
KeyValue[] ks = new KeyValue[k.keys.length];
|
|
for (int i = 0; i < ks.length; i++)
|
|
if (k.keys[i] != null)
|
|
ks[i] = apply(k.keys[i], k.keyHasFlag(i, Key.F_LOC));
|
|
return new Key(ks, k.anticircle, k.keysflags, k.width, k.shift, k.slider, k.indication);
|
|
}
|
|
}
|
|
|
|
public static class Modmap
|
|
{
|
|
public final Map<KeyValue, KeyValue> shift;
|
|
public final Map<KeyValue, KeyValue> fn;
|
|
|
|
public Modmap(Map<KeyValue, KeyValue> s, Map<KeyValue, KeyValue> f)
|
|
{
|
|
shift = s;
|
|
fn = f;
|
|
}
|
|
|
|
public static Modmap parse(XmlPullParser parser) throws Exception
|
|
{
|
|
HashMap<KeyValue, KeyValue> shift = new HashMap<KeyValue, KeyValue>();
|
|
HashMap<KeyValue, KeyValue> fn = new HashMap<KeyValue, KeyValue>();
|
|
|
|
while (next_tag(parser))
|
|
{
|
|
switch (parser.getName())
|
|
{
|
|
case "shift":
|
|
parse_mapping(parser, shift);
|
|
break;
|
|
case "fn":
|
|
parse_mapping(parser, fn);
|
|
break;
|
|
default:
|
|
throw error(parser, "Expecting tag <shift> or <fn>, got <" + parser.getName() + ">");
|
|
}
|
|
}
|
|
|
|
return new Modmap(shift, fn);
|
|
}
|
|
|
|
private static void parse_mapping(XmlPullParser parser, Map<KeyValue, KeyValue> dst) throws Exception
|
|
{
|
|
KeyValue a = KeyValue.getKeyByName(parser.getAttributeValue(null, "a"));
|
|
KeyValue b = KeyValue.getKeyByName(parser.getAttributeValue(null, "b"));
|
|
while (parser.next() != XmlPullParser.END_TAG)
|
|
continue;
|
|
dst.put(a, b);
|
|
}
|
|
}
|
|
|
|
/** Position of a key on the layout. */
|
|
public final static class KeyPos
|
|
{
|
|
public final int row;
|
|
public final int col;
|
|
public final int dir;
|
|
|
|
public KeyPos(int r, int c, int d)
|
|
{
|
|
row = r;
|
|
col = c;
|
|
dir = d;
|
|
}
|
|
|
|
public KeyPos with_dir(int d)
|
|
{
|
|
return new KeyPos(row, col, d);
|
|
}
|
|
}
|
|
|
|
/** See [addExtraKeys()]. */
|
|
public final static class PreferredPos
|
|
{
|
|
/** Default position for extra keys. */
|
|
public static final PreferredPos DEFAULT;
|
|
public static final PreferredPos ANYWHERE;
|
|
|
|
/** Prefer the free position on the same keyboard key as the specified key.
|
|
Considered before [positions]. Might be [null]. */
|
|
public KeyValue next_to = null;
|
|
|
|
/** Array of positions to try in order. The special value [-1] as [row],
|
|
[col] or [dir] means that the field is unspecified. Every possible
|
|
values are tried for unspecified fields. Unspecified fields are
|
|
searched in this order: [dir], [col], [row]. */
|
|
public KeyPos[] positions = ANYWHERE_POSITIONS;
|
|
|
|
public PreferredPos() {}
|
|
public PreferredPos(KeyValue next_to_) { next_to = next_to_; }
|
|
public PreferredPos(KeyPos[] pos) { positions = pos; }
|
|
public PreferredPos(KeyValue next_to_, KeyPos[] pos) { next_to = next_to_; positions = pos; }
|
|
|
|
public PreferredPos(PreferredPos src)
|
|
{
|
|
next_to = src.next_to;
|
|
positions = src.positions;
|
|
}
|
|
|
|
static final KeyPos[] ANYWHERE_POSITIONS =
|
|
new KeyPos[]{ new KeyPos(-1, -1, -1) };
|
|
|
|
static
|
|
{
|
|
DEFAULT = new PreferredPos(new KeyPos[]{
|
|
new KeyPos(1, -1, 4),
|
|
new KeyPos(1, -1, 3),
|
|
new KeyPos(2, -1, 2),
|
|
new KeyPos(2, -1, 1)
|
|
});
|
|
ANYWHERE = new PreferredPos();
|
|
}
|
|
}
|
|
|
|
/** Parsing utils */
|
|
|
|
/** Returns [false] on [END_DOCUMENT] or [END_TAG], [true] otherwise. */
|
|
private static boolean next_tag(XmlPullParser parser) throws Exception
|
|
{
|
|
int status;
|
|
do
|
|
{
|
|
status = parser.next();
|
|
if (status == XmlPullParser.END_DOCUMENT || status == XmlPullParser.END_TAG)
|
|
return false;
|
|
}
|
|
while (status != XmlPullParser.START_TAG);
|
|
return true;
|
|
}
|
|
|
|
/** Returns [false] on [END_DOCUMENT] or [END_TAG], [true] otherwise. */
|
|
private static boolean expect_tag(XmlPullParser parser, String name) throws Exception
|
|
{
|
|
if (!next_tag(parser))
|
|
return false;
|
|
if (!parser.getName().equals(name))
|
|
throw error(parser, "Expecting tag <" + name + ">, got <" +
|
|
parser.getName() + ">");
|
|
return true;
|
|
}
|
|
|
|
private static boolean attribute_bool(XmlPullParser parser, String attr, boolean default_val)
|
|
{
|
|
String val = parser.getAttributeValue(null, attr);
|
|
if (val == null)
|
|
return default_val;
|
|
return val.equals("true");
|
|
}
|
|
|
|
private static float attribute_float(XmlPullParser parser, String attr, float default_val)
|
|
{
|
|
String val = parser.getAttributeValue(null, attr);
|
|
if (val == null)
|
|
return default_val;
|
|
return Float.parseFloat(val);
|
|
}
|
|
|
|
/** Construct a parsing error. */
|
|
private static Exception error(XmlPullParser parser, String message)
|
|
{
|
|
return new Exception(message + " " + parser.getPositionDescription());
|
|
}
|
|
}
|