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/** * <tt>ASCIICodeToKeyEventConstantTranslator.java</tt> *//ww w. j a va 2s .com * VKB (Virtual KeyBoard) 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. * * VKB (Virtual KeyBoard) 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 * VKB (Virtual KeyBoard). If not, see <http://www.gnu.org/licenses/>. * * @author Tobias Groch <tgroch@stud.hs-bremen.de> * @author Florian Wolters <flwolters@stud.hs-bremen.de> * @license http://gnu.org/licenses/gpl.txt GNU General Public License * @version SVN: Id:$ * @since File available since Release 1.0.0 */ package de.hs_bremen.vkb; import java.util.HashMap; import java.util.Map; import android.view.KeyEvent; /** * The class <tt>CodeToKeyEventConstantTranslator</tt> translates the unicode * code of the key that was pressed into the corresponding key code constant of * <tt>{@link KeyEvent}</tt>. * * @author Tobias Groch <tgroch@stud.hs-bremen.de> * @author Florian Wolters <flwolters@stud.hs-bremen.de> * @version Release: @package_version@ * @since Class available since Release 1.0.0 */ public final class ASCIICodeToKeyEventConstantTranslator { /** * Contains the mappings to convert the ASCII code of the key that was * pressed into the corresponding key code constant of <tt>{@link * KeyEvent}</tt>. */ private static final Map<Integer, Integer> _MAP = new HashMap<Integer, Integer>(); static { // Control Characters ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.BS, KeyEvent.KEYCODE_DEL ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.HT, KeyEvent.KEYCODE_TAB ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.LF, KeyEvent.KEYCODE_ENTER ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.ESC, KeyEvent.KEYCODE_ESCAPE ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.DEL, KeyEvent.KEYCODE_FORWARD_DEL ); // Graphic Characters // '0'-'9' ASCIICodeToKeyEventConstantTranslator._mapCharRange('0', '9', 41); // 'A'-'Z' ASCIICodeToKeyEventConstantTranslator._mapCharRange('A', 'Z', 36); // 'a'-'z' ASCIICodeToKeyEventConstantTranslator._mapCharRange('a', 'z', 68); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.APOSTROPHE, KeyEvent.KEYCODE_APOSTROPHE ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.ASTERISK, KeyEvent.KEYCODE_STAR ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.CLOSING_BRACKET, KeyEvent.KEYCODE_RIGHT_BRACKET ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.CLOSING_PARENTHESIS, KeyEvent.KEYCODE_NUMPAD_RIGHT_PAREN ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.COMMA, KeyEvent.KEYCODE_COMMA ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.COMMERCIAL_AT, KeyEvent.KEYCODE_AT ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.EQUALS, KeyEvent.KEYCODE_EQUALS ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.GRAVE_ACCENT, KeyEvent.KEYCODE_GRAVE ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.HYPHEN, KeyEvent.KEYCODE_MINUS ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.NUMBER_SIGN, KeyEvent.KEYCODE_POUND ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.OPENING_BRACKET, KeyEvent.KEYCODE_LEFT_BRACKET ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.OPENING_PARENTHESIS, KeyEvent.KEYCODE_NUMPAD_LEFT_PAREN ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.PERIOD, KeyEvent.KEYCODE_PERIOD ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.PLUS, KeyEvent.KEYCODE_PLUS ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.REVERSE_SLANT, KeyEvent.KEYCODE_BACKSLASH ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.SEMICOLON, KeyEvent.KEYCODE_SEMICOLON ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.SLANT, KeyEvent.KEYCODE_SLASH ); ASCIICodeToKeyEventConstantTranslator._MAP.put( ASCIICharacters.SPACE, KeyEvent.KEYCODE_SPACE ); } /** * Puts a range of ASCII codes and the corresponding key code constants of * <tt>{@link KeyEvent}</tt> into the map. * * @param start the character to start with. * @param end the character to end with. * @param offset the offset between the ASCII code and the corresponding key * code constant of <tt>{@link KeyEvent}</tt> */ private static void _mapCharRange( final char start, final char end, final int offset ) { int i = 0; for (char c = start; c < end; ++c) { i = c; ASCIICodeToKeyEventConstantTranslator._MAP.put(i, i - offset); } } /** * <tt>ASCIICodeToKeyEventConstantTranslator</tt> instances should * <i>NOT</i> be constructed in standard programming. * * Instead, the class should be used as: * <code> * CodeToKeyEventConstantTranslator.translate(ASCIICharacters.DEL); * </code> */ private ASCIICodeToKeyEventConstantTranslator() { } /** * Returns the corresponding key code constant of <tt>{@link KeyEvent}</tt> * for the specified unicode code of the key that was pressed. * * @param primaryCode the unicode code of the key that was released. * * @return the key code constant of <tt>{@link KeyEvent}</tt> to which the * specified code is mapped, or <tt>null</tt> the code is unknown. */ public static int translate(final int primaryCode) { return ASCIICodeToKeyEventConstantTranslator._MAP.get(primaryCode); } }