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Cache three main keyboards to improve average switch time 

This typically improves the average loading time by about
35%, after the first time.

Bug: 8689779
Change-Id: I7b0ab6b942af1d3250b9dcbf875f27f9f64692f3
main
Jean Chalard 2013-06-05 19:40:50 +09:00
parent 8ea77542f9
commit 4d8f9f1cab
1 changed files with 32 additions and 4 deletions
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36
java/src/com/android/inputmethod/keyboard/KeyboardLayoutSet.java
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@ -80,6 +80,14 @@ public final class KeyboardLayoutSet {
private final Context mContext;
private final Params mParams;
// How many layouts we forcibly keep in cache. This only includes ALPHABET (default) and
// ALPHABET_AUTOMATIC_SHIFTED layouts - other layouts may stay in memory in the map of
// soft-references, but we forcibly cache this many alphabetic/auto-shifted layouts.
private static final int FORCIBLE_CACHE_SIZE = 4;
// By construction of soft references, anything that is also referenced somewhere else
// will stay in the cache. So we forcibly keep some references in an array to prevent
// them from disappearing from sKeyboardCache.
private static final Keyboard[] sForcibleKeyboardCache = new Keyboard[FORCIBLE_CACHE_SIZE];
private static final HashMap<KeyboardId, SoftReference<Keyboard>> sKeyboardCache =
CollectionUtils.newHashMap();
private static final KeysCache sKeysCache = new KeysCache();
@ -110,6 +118,7 @@ public final class KeyboardLayoutSet {
boolean mNoSettingsKey;
boolean mLanguageSwitchKeyEnabled;
InputMethodSubtype mSubtype;
boolean mIsSpellChecker;
int mOrientation;
int mKeyboardWidth;
int mKeyboardHeight;
@ -185,7 +194,18 @@ public final class KeyboardLayoutSet {
elementParams.mProximityCharsCorrectionEnabled);
keyboard = builder.build();
sKeyboardCache.put(id, new SoftReference<Keyboard>(keyboard));
if ((id.mElementId == KeyboardId.ELEMENT_ALPHABET
|| id.mElementId == KeyboardId.ELEMENT_ALPHABET_AUTOMATIC_SHIFTED)
&& !mParams.mIsSpellChecker) {
// We only forcibly cache the primary, "ALPHABET", layouts.
for (int i = sForcibleKeyboardCache.length - 1; i >= 1; --i) {
sForcibleKeyboardCache[i] = sForcibleKeyboardCache[i - 1];
}
sForcibleKeyboardCache[0] = keyboard;
if (DEBUG_CACHE) {
Log.d(TAG, "forcing caching of keyboard with id=" + id);
}
}
if (DEBUG_CACHE) {
Log.d(TAG, "keyboard cache size=" + sKeyboardCache.size() + ": "
+ ((ref == null) ? "LOAD" : "GCed") + " id=" + id);
@ -272,6 +292,11 @@ public final class KeyboardLayoutSet {
return this;
}
public Builder setIsSpellChecker(final boolean isSpellChecker) {
mParams.mIsSpellChecker = true;
return this;
}
public Builder setOptions(final boolean voiceKeyEnabled, final boolean voiceKeyOnMain,
final boolean languageSwitchKeyEnabled) {
@SuppressWarnings("deprecation")
@ -422,7 +447,8 @@ public final class KeyboardLayoutSet {
final InputMethodSubtype subtype =
AdditionalSubtype.createAdditionalSubtype(locale, layout, null);
return createKeyboardSet(context, subtype, SPELLCHECKER_DUMMY_KEYBOARD_WIDTH,
SPELLCHECKER_DUMMY_KEYBOARD_HEIGHT, false);
SPELLCHECKER_DUMMY_KEYBOARD_HEIGHT, false /* testCasesHaveTouchCoordinates */,
true /* isSpellChecker */);
}
@UsedForTesting
@ -442,18 +468,20 @@ public final class KeyboardLayoutSet {
throw new RuntimeException("Orientation should be ORIENTATION_LANDSCAPE or "
+ "ORIENTATION_PORTRAIT: orientation=" + orientation);
}
return createKeyboardSet(context, subtype, width, height, testCasesHaveTouchCoordinates);
return createKeyboardSet(context, subtype, width, height, testCasesHaveTouchCoordinates,
false /* isSpellChecker */);
}
private static KeyboardLayoutSet createKeyboardSet(final Context context,
final InputMethodSubtype subtype, final int width, final int height,
final boolean testCasesHaveTouchCoordinates) {
final boolean testCasesHaveTouchCoordinates, final boolean isSpellChecker) {
final EditorInfo editorInfo = new EditorInfo();
editorInfo.inputType = InputType.TYPE_CLASS_TEXT;
final KeyboardLayoutSet.Builder builder = new KeyboardLayoutSet.Builder(
context, editorInfo);
builder.setScreenGeometry(width, height);
builder.setSubtype(subtype);
builder.setIsSpellChecker(isSpellChecker);
if (!testCasesHaveTouchCoordinates) {
// For spell checker and tests
builder.disableTouchPositionCorrectionData();