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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
      5  * use this file except in compliance with the License. You may obtain a copy of
      6  * the License at
      7  *
      8  * http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
     12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
     13  * License for the specific language governing permissions and limitations under
     14  * the License.
     15  */
     16 
     17 package com.android.inputmethod.keyboard.internal;
     18 
     19 import android.content.res.Resources;
     20 import android.content.res.TypedArray;
     21 import android.graphics.drawable.Drawable;
     22 import android.util.Log;
     23 
     24 import com.android.inputmethod.latin.R;
     25 
     26 import java.util.HashMap;
     27 
     28 public class KeyboardIconsSet {
     29     private static final String TAG = KeyboardIconsSet.class.getSimpleName();
     30 
     31     public static final int ICON_UNDEFINED = 0;
     32     private static final int ATTR_UNDEFINED = 0;
     33 
     34     private static final HashMap<Integer, Integer> ATTR_ID_TO_ICON_ID
     35             = new HashMap<Integer, Integer>();
     36 
     37     // Icon name to icon id map.
     38     private static final HashMap<String, Integer> sNameToIdsMap = new HashMap<String, Integer>();
     39 
     40     private static final Object[] NAMES_AND_ATTR_IDS = {
     41         "undefined",                    ATTR_UNDEFINED,
     42         "shift_key",                    R.styleable.Keyboard_iconShiftKey,
     43         "delete_key",                   R.styleable.Keyboard_iconDeleteKey,
     44         "settings_key",                 R.styleable.Keyboard_iconSettingsKey,
     45         "space_key",                    R.styleable.Keyboard_iconSpaceKey,
     46         "enter_key",                    R.styleable.Keyboard_iconEnterKey,
     47         "search_key",                   R.styleable.Keyboard_iconSearchKey,
     48         "tab_key",                      R.styleable.Keyboard_iconTabKey,
     49         "shortcut_key",                 R.styleable.Keyboard_iconShortcutKey,
     50         "shortcut_for_label",           R.styleable.Keyboard_iconShortcutForLabel,
     51         "space_key_for_number_layout",  R.styleable.Keyboard_iconSpaceKeyForNumberLayout,
     52         "shift_key_shifted",            R.styleable.Keyboard_iconShiftKeyShifted,
     53         "shortcut_key_disabled",        R.styleable.Keyboard_iconShortcutKeyDisabled,
     54         "tab_key_preview",              R.styleable.Keyboard_iconTabKeyPreview,
     55         "language_switch_key",          R.styleable.Keyboard_iconLanguageSwitchKey,
     56         "zwnj_key",                     R.styleable.Keyboard_iconZwnjKey,
     57         "zwj_key",                      R.styleable.Keyboard_iconZwjKey,
     58     };
     59 
     60     private static int NUM_ICONS = NAMES_AND_ATTR_IDS.length / 2;
     61     private static final String[] ICON_NAMES = new String[NUM_ICONS];
     62     private final Drawable[] mIcons = new Drawable[NUM_ICONS];
     63 
     64     static {
     65         int iconId = ICON_UNDEFINED;
     66         for (int i = 0; i < NAMES_AND_ATTR_IDS.length; i += 2) {
     67             final String name = (String)NAMES_AND_ATTR_IDS[i];
     68             final Integer attrId = (Integer)NAMES_AND_ATTR_IDS[i + 1];
     69             if (attrId != ATTR_UNDEFINED) {
     70                 ATTR_ID_TO_ICON_ID.put(attrId,  iconId);
     71             }
     72             sNameToIdsMap.put(name, iconId);
     73             ICON_NAMES[iconId] = name;
     74             iconId++;
     75         }
     76     }
     77 
     78     public void loadIcons(final TypedArray keyboardAttrs) {
     79         for (final Integer attrId : ATTR_ID_TO_ICON_ID.keySet()) {
     80             try {
     81                 final Drawable icon = keyboardAttrs.getDrawable(attrId);
     82                 setDefaultBounds(icon);
     83                 final Integer iconId = ATTR_ID_TO_ICON_ID.get(attrId);
     84                 mIcons[iconId] = icon;
     85             } catch (Resources.NotFoundException e) {
     86                 Log.w(TAG, "Drawable resource for icon #"
     87                         + keyboardAttrs.getResources().getResourceEntryName(attrId)
     88                         + " not found");
     89             }
     90         }
     91     }
     92 
     93     private static boolean isValidIconId(final int iconId) {
     94         return iconId >= 0 && iconId < ICON_NAMES.length;
     95     }
     96 
     97     public static String getIconName(final int iconId) {
     98         return isValidIconId(iconId) ? ICON_NAMES[iconId] : "unknown<" + iconId + ">";
     99     }
    100 
    101     static int getIconId(final String name) {
    102         Integer iconId = sNameToIdsMap.get(name);
    103         if (iconId != null) {
    104             return iconId;
    105         }
    106         throw new RuntimeException("unknown icon name: " + name);
    107     }
    108 
    109     public Drawable getIconDrawable(final int iconId) {
    110         if (isValidIconId(iconId)) {
    111             return mIcons[iconId];
    112         }
    113         throw new RuntimeException("unknown icon id: " + getIconName(iconId));
    114     }
    115 
    116     private static void setDefaultBounds(final Drawable icon)  {
    117         if (icon != null) {
    118             icon.setBounds(0, 0, icon.getIntrinsicWidth(), icon.getIntrinsicHeight());
    119         }
    120     }
    121 }
    122