/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.inputmethod.keyboard;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Align;
import android.graphics.PorterDuff;
import android.graphics.Rect;
import android.graphics.Region.Op;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.os.Message;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.android.inputmethod.compat.FrameLayoutCompatUtils;
import com.sugree.inputmethod.latin.R;
import com.sugree.inputmethod.latin.LatinImeLogger;
import com.sugree.inputmethod.latin.StaticInnerHandlerWrapper;
import java.util.HashMap;
/**
* A view that renders a virtual {@link Keyboard}.
*
* @attr ref R.styleable#KeyboardView_backgroundDimAmount
* @attr ref R.styleable#KeyboardView_keyBackground
* @attr ref R.styleable#KeyboardView_keyLetterRatio
* @attr ref R.styleable#KeyboardView_keyLargeLetterRatio
* @attr ref R.styleable#KeyboardView_keyLabelRatio
* @attr ref R.styleable#KeyboardView_keyHintLetterRatio
* @attr ref R.styleable#KeyboardView_keyUppercaseLetterRatio
* @attr ref R.styleable#KeyboardView_keyHintLabelRatio
* @attr ref R.styleable#KeyboardView_keyLabelHorizontalPadding
* @attr ref R.styleable#KeyboardView_keyHintLetterPadding
* @attr ref R.styleable#KeyboardView_keyPopupHintLetterPadding
* @attr ref R.styleable#KeyboardView_keyUppercaseLetterPadding
* @attr ref R.styleable#KeyboardView_keyTextStyle
* @attr ref R.styleable#KeyboardView_keyPreviewLayout
* @attr ref R.styleable#KeyboardView_keyPreviewTextRatio
* @attr ref R.styleable#KeyboardView_keyPreviewOffset
* @attr ref R.styleable#KeyboardView_keyPreviewHeight
* @attr ref R.styleable#KeyboardView_keyTextColor
* @attr ref R.styleable#KeyboardView_keyTextColorDisabled
* @attr ref R.styleable#KeyboardView_keyHintLetterColor
* @attr ref R.styleable#KeyboardView_keyHintLabelColor
* @attr ref R.styleable#KeyboardView_keyUppercaseLetterInactivatedColor
* @attr ref R.styleable#KeyboardView_keyUppercaseLetterActivatedColor
* @attr ref R.styleable#KeyboardView_shadowColor
* @attr ref R.styleable#KeyboardView_shadowRadius
*/
public class KeyboardView extends View implements PointerTracker.DrawingProxy {
// Miscellaneous constants
private static final int[] LONG_PRESSABLE_STATE_SET = { android.R.attr.state_long_pressable };
// XML attributes
protected final float mVerticalCorrection;
protected final int mMoreKeysLayout;
private final float mBackgroundDimAmount;
// HORIZONTAL ELLIPSIS "...", character for popup hint.
private static final String POPUP_HINT_CHAR = "\u2026";
// Margin between the label and the icon on a key that has both of them.
// Specified by the fraction of the key width.
// TODO: Use resource parameter for this value.
private static final float LABEL_ICON_MARGIN = 0.05f;
// The maximum key label width in the proportion to the key width.
private static final float MAX_LABEL_RATIO = 0.90f;
// Main keyboard
private Keyboard mKeyboard;
private final KeyDrawParams mKeyDrawParams;
// Key preview
private final int mKeyPreviewLayoutId;
protected final KeyPreviewDrawParams mKeyPreviewDrawParams;
private boolean mShowKeyPreviewPopup = true;
private final int mDelayBeforePreview;
private int mDelayAfterPreview;
private ViewGroup mPreviewPlacer;
// Drawing
/** True if the entire keyboard needs to be dimmed. */
private boolean mNeedsToDimBackground;
/** Whether the keyboard bitmap buffer needs to be redrawn before it's blitted. **/
private boolean mBufferNeedsUpdate;
/** The dirty region in the keyboard bitmap */
private final Rect mDirtyRect = new Rect();
/** The key to invalidate. */
private Key mInvalidatedKey;
/** The dirty region for single key drawing */
private final Rect mInvalidatedKeyRect = new Rect();
/** The keyboard bitmap buffer for faster updates */
private Bitmap mBuffer;
/** The canvas for the above mutable keyboard bitmap */
private Canvas mCanvas;
private final Paint mPaint = new Paint();
// This map caches key label text height in pixel as value and key label text size as map key.
private static final HashMap<Integer, Float> sTextHeightCache =
new HashMap<Integer, Float>();
// This map caches key label text width in pixel as value and key label text size as map key.
private static final HashMap<Integer, Float> sTextWidthCache =
new HashMap<Integer, Float>();
private static final char[] KEY_LABEL_REFERENCE_CHAR = { 'M' };
private static final char[] KEY_NUMERIC_HINT_LABEL_REFERENCE_CHAR = { '8' };
private final DrawingHandler mDrawingHandler = new DrawingHandler(this);
public static class DrawingHandler extends StaticInnerHandlerWrapper<KeyboardView> {
private static final int MSG_SHOW_KEY_PREVIEW = 1;
private static final int MSG_DISMISS_KEY_PREVIEW = 2;
public DrawingHandler(KeyboardView outerInstance) {
super(outerInstance);
}
@Override
public void handleMessage(Message msg) {
final KeyboardView keyboardView = getOuterInstance();
if (keyboardView == null) return;
final PointerTracker tracker = (PointerTracker) msg.obj;
switch (msg.what) {
case MSG_SHOW_KEY_PREVIEW:
keyboardView.showKey(msg.arg1, tracker);
break;
case MSG_DISMISS_KEY_PREVIEW:
tracker.getKeyPreviewText().setVisibility(View.INVISIBLE);
break;
}
}
public void showKeyPreview(long delay, int keyIndex, PointerTracker tracker) {
removeMessages(MSG_SHOW_KEY_PREVIEW);
final KeyboardView keyboardView = getOuterInstance();
if (keyboardView == null) return;
if (tracker.getKeyPreviewText().getVisibility() == VISIBLE || delay == 0) {
// Show right away, if it's already visible and finger is moving around
keyboardView.showKey(keyIndex, tracker);
} else {
sendMessageDelayed(
obtainMessage(MSG_SHOW_KEY_PREVIEW, keyIndex, 0, tracker), delay);
}
}
public void cancelShowKeyPreview(PointerTracker tracker) {
removeMessages(MSG_SHOW_KEY_PREVIEW, tracker);
}
public void cancelAllShowKeyPreviews() {
removeMessages(MSG_SHOW_KEY_PREVIEW);
}
public void dismissKeyPreview(long delay, PointerTracker tracker) {
sendMessageDelayed(obtainMessage(MSG_DISMISS_KEY_PREVIEW, tracker), delay);
}
public void cancelDismissKeyPreview(PointerTracker tracker) {
removeMessages(MSG_DISMISS_KEY_PREVIEW, tracker);
}
public void cancelAllDismissKeyPreviews() {
removeMessages(MSG_DISMISS_KEY_PREVIEW);
}
public void cancelAllMessages() {
cancelAllShowKeyPreviews();
cancelAllDismissKeyPreviews();
}
}
private static class KeyDrawParams {
// XML attributes
public final int mKeyTextColor;
public final int mKeyTextInactivatedColor;
public final Typeface mKeyTextStyle;
public final float mKeyLabelHorizontalPadding;
public final float mKeyHintLetterPadding;
public final float mKeyPopupHintLetterPadding;
public final float mKeyUppercaseLetterPadding;
public final int mShadowColor;
public final float mShadowRadius;
public final Drawable mKeyBackground;
public final int mKeyHintLetterColor;
public final int mKeyHintLabelColor;
public final int mKeyUppercaseLetterInactivatedColor;
public final int mKeyUppercaseLetterActivatedColor;
private final float mKeyLetterRatio;
private final float mKeyLargeLetterRatio;
private final float mKeyLabelRatio;
private final float mKeyHintLetterRatio;
private final float mKeyUppercaseLetterRatio;
private final float mKeyHintLabelRatio;
private static final float UNDEFINED_RATIO = -1.0f;
public final Rect mPadding = new Rect();
public int mKeyLetterSize;
public int mKeyLargeLetterSize;
public int mKeyLabelSize;
public int mKeyHintLetterSize;
public int mKeyUppercaseLetterSize;
public int mKeyHintLabelSize;
public KeyDrawParams(TypedArray a) {
mKeyBackground = a.getDrawable(R.styleable.KeyboardView_keyBackground);
if (a.hasValue(R.styleable.KeyboardView_keyLetterSize)) {
mKeyLetterRatio = UNDEFINED_RATIO;
mKeyLetterSize = a.getDimensionPixelSize(R.styleable.KeyboardView_keyLetterSize, 0);
} else {
mKeyLetterRatio = getRatio(a, R.styleable.KeyboardView_keyLetterRatio);
}
if (a.hasValue(R.styleable.KeyboardView_keyLabelSize)) {
mKeyLabelRatio = UNDEFINED_RATIO;
mKeyLabelSize = a.getDimensionPixelSize(R.styleable.KeyboardView_keyLabelSize, 0);
} else {
mKeyLabelRatio = getRatio(a, R.styleable.KeyboardView_keyLabelRatio);
}
mKeyLargeLetterRatio = getRatio(a, R.styleable.KeyboardView_keyLargeLetterRatio);
mKeyHintLetterRatio = getRatio(a, R.styleable.KeyboardView_keyHintLetterRatio);
mKeyUppercaseLetterRatio = getRatio(a,
R.styleable.KeyboardView_keyUppercaseLetterRatio);
mKeyHintLabelRatio = getRatio(a, R.styleable.KeyboardView_keyHintLabelRatio);
mKeyLabelHorizontalPadding = a.getDimension(
R.styleable.KeyboardView_keyLabelHorizontalPadding, 0);
mKeyHintLetterPadding = a.getDimension(
R.styleable.KeyboardView_keyHintLetterPadding, 0);
mKeyPopupHintLetterPadding = a.getDimension(
R.styleable.KeyboardView_keyPopupHintLetterPadding, 0);
mKeyUppercaseLetterPadding = a.getDimension(
R.styleable.KeyboardView_keyUppercaseLetterPadding, 0);
mKeyTextColor = a.getColor(R.styleable.KeyboardView_keyTextColor, 0xFF000000);
mKeyTextInactivatedColor = a.getColor(
R.styleable.KeyboardView_keyTextInactivatedColor, 0xFF000000);
mKeyHintLetterColor = a.getColor(R.styleable.KeyboardView_keyHintLetterColor, 0);
mKeyHintLabelColor = a.getColor(R.styleable.KeyboardView_keyHintLabelColor, 0);
mKeyUppercaseLetterInactivatedColor = a.getColor(
R.styleable.KeyboardView_keyUppercaseLetterInactivatedColor, 0);
mKeyUppercaseLetterActivatedColor = a.getColor(
R.styleable.KeyboardView_keyUppercaseLetterActivatedColor, 0);
mKeyTextStyle = Typeface.defaultFromStyle(
a.getInt(R.styleable.KeyboardView_keyTextStyle, Typeface.NORMAL));
mShadowColor = a.getColor(R.styleable.KeyboardView_shadowColor, 0);
mShadowRadius = a.getFloat(R.styleable.KeyboardView_shadowRadius, 0f);
mKeyBackground.getPadding(mPadding);
}
public void updateKeyHeight(int keyHeight) {
if (mKeyLetterRatio >= 0.0f)
mKeyLetterSize = (int)(keyHeight * mKeyLetterRatio);
if (mKeyLabelRatio >= 0.0f)
mKeyLabelSize = (int)(keyHeight * mKeyLabelRatio);
mKeyLargeLetterSize = (int)(keyHeight * mKeyLargeLetterRatio);
mKeyHintLetterSize = (int)(keyHeight * mKeyHintLetterRatio);
mKeyUppercaseLetterSize = (int)(keyHeight * mKeyUppercaseLetterRatio);
mKeyHintLabelSize = (int)(keyHeight * mKeyHintLabelRatio);
}
}
protected static class KeyPreviewDrawParams {
// XML attributes.
public final Drawable mPreviewBackground;
public final Drawable mPreviewLeftBackground;
public final Drawable mPreviewRightBackground;
public final int mPreviewBackgroundWidth;
public final int mPreviewBackgroundHeight;
public final int mPreviewTextColor;
public final int mPreviewOffset;
public final int mPreviewHeight;
public final Typeface mKeyTextStyle;
private final float mPreviewTextRatio;
private final float mKeyLetterRatio;
public int mPreviewTextSize;
public int mKeyLetterSize;
public final int[] mCoordinates = new int[2];
private static final int PREVIEW_ALPHA = 240;
public KeyPreviewDrawParams(TypedArray a, KeyDrawParams keyDrawParams) {
mPreviewBackground = a.getDrawable(R.styleable.KeyboardView_keyPreviewBackground);
mPreviewLeftBackground = a.getDrawable(
R.styleable.KeyboardView_keyPreviewLeftBackground);
mPreviewRightBackground = a.getDrawable(
R.styleable.KeyboardView_keyPreviewRightBackground);
setAlpha(mPreviewBackground, PREVIEW_ALPHA);
setAlpha(mPreviewLeftBackground, PREVIEW_ALPHA);
setAlpha(mPreviewRightBackground, PREVIEW_ALPHA);
mPreviewBackgroundWidth = a.getDimensionPixelSize(
R.styleable.KeyboardView_keyPreviewBackgroundWidth, 0);
mPreviewBackgroundHeight = a.getDimensionPixelSize(
R.styleable.KeyboardView_keyPreviewBackgroundHeight, 0);
mPreviewOffset = a.getDimensionPixelOffset(
R.styleable.KeyboardView_keyPreviewOffset, 0);
mPreviewHeight = a.getDimensionPixelSize(
R.styleable.KeyboardView_keyPreviewHeight, 80);
mPreviewTextRatio = getRatio(a, R.styleable.KeyboardView_keyPreviewTextRatio);
mPreviewTextColor = a.getColor(R.styleable.KeyboardView_keyPreviewTextColor, 0);
mKeyLetterRatio = keyDrawParams.mKeyLetterRatio;
mKeyTextStyle = keyDrawParams.mKeyTextStyle;
}
public void updateKeyHeight(int keyHeight) {
mPreviewTextSize = (int)(keyHeight * mPreviewTextRatio);
mKeyLetterSize = (int)(keyHeight * mKeyLetterRatio);
}
private static void setAlpha(Drawable drawable, int alpha) {
if (drawable == null)
return;
drawable.setAlpha(alpha);
}
}
public KeyboardView(Context context, AttributeSet attrs) {
this(context, attrs, R.attr.keyboardViewStyle);
}
public KeyboardView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
final TypedArray a = context.obtainStyledAttributes(
attrs, R.styleable.KeyboardView, defStyle, R.style.KeyboardView);
mKeyDrawParams = new KeyDrawParams(a);
mKeyPreviewDrawParams = new KeyPreviewDrawParams(a, mKeyDrawParams);
mKeyPreviewLayoutId = a.getResourceId(R.styleable.KeyboardView_keyPreviewLayout, 0);
if (mKeyPreviewLayoutId == 0) {
mShowKeyPreviewPopup = false;
}
mVerticalCorrection = a.getDimensionPixelOffset(
R.styleable.KeyboardView_verticalCorrection, 0);
mMoreKeysLayout = a.getResourceId(R.styleable.KeyboardView_moreKeysLayout, 0);
mBackgroundDimAmount = a.getFloat(R.styleable.KeyboardView_backgroundDimAmount, 0.5f);
a.recycle();
final Resources res = getResources();
mDelayBeforePreview = res.getInteger(R.integer.config_delay_before_preview);
mDelayAfterPreview = res.getInteger(R.integer.config_delay_after_preview);
mPaint.setAntiAlias(true);
mPaint.setTextAlign(Align.CENTER);
mPaint.setAlpha(255);
}
// Read fraction value in TypedArray as float.
private static float getRatio(TypedArray a, int index) {
return a.getFraction(index, 1000, 1000, 1) / 1000.0f;
}
/**
* Attaches a keyboard to this view. The keyboard can be switched at any time and the
* view will re-layout itself to accommodate the keyboard.
* @see Keyboard
* @see #getKeyboard()
* @param keyboard the keyboard to display in this view
*/
public void setKeyboard(Keyboard keyboard) {
// Remove any pending dismissing preview
mDrawingHandler.cancelAllShowKeyPreviews();
if (mKeyboard != null) {
PointerTracker.dismissAllKeyPreviews();
}
mKeyboard = keyboard;
LatinImeLogger.onSetKeyboard(keyboard);
requestLayout();
mDirtyRect.set(0, 0, getWidth(), getHeight());
mBufferNeedsUpdate = true;
invalidateAllKeys();
final int keyHeight = keyboard.mMostCommonKeyHeight - keyboard.mVerticalGap;
mKeyDrawParams.updateKeyHeight(keyHeight);
mKeyPreviewDrawParams.updateKeyHeight(keyHeight);
}
/**
* Returns the current keyboard being displayed by this view.
* @return the currently attached keyboard
* @see #setKeyboard(Keyboard)
*/
public Keyboard getKeyboard() {
return mKeyboard;
}
/**
* Enables or disables the key feedback popup. This is a popup that shows a magnified
* version of the depressed key. By default the preview is enabled.
* @param previewEnabled whether or not to enable the key feedback preview
* @param delay the delay after which the preview is dismissed
* @see #isKeyPreviewPopupEnabled()
*/
public void setKeyPreviewPopupEnabled(boolean previewEnabled, int delay) {
mShowKeyPreviewPopup = previewEnabled;
mDelayAfterPreview = delay;
}
/**
* Returns the enabled state of the key feedback preview
* @return whether or not the key feedback preview is enabled
* @see #setKeyPreviewPopupEnabled(boolean, int)
*/
public boolean isKeyPreviewPopupEnabled() {
return mShowKeyPreviewPopup;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
if (mKeyboard != null) {
// The main keyboard expands to the display width.
final int height = mKeyboard.mOccupiedHeight + getPaddingTop() + getPaddingBottom();
setMeasuredDimension(widthMeasureSpec, height);
} else {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mBufferNeedsUpdate || mBuffer == null) {
mBufferNeedsUpdate = false;
onBufferDraw();
}
canvas.drawBitmap(mBuffer, 0, 0, null);
}
private void onBufferDraw() {
final int width = getWidth();
final int height = getHeight();
if (width == 0 || height == 0)
return;
if (mBuffer == null || mBuffer.getWidth() != width || mBuffer.getHeight() != height) {
if (mBuffer != null)
mBuffer.recycle();
mBuffer = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
mDirtyRect.union(0, 0, width, height);
if (mCanvas != null) {
mCanvas.setBitmap(mBuffer);
} else {
mCanvas = new Canvas(mBuffer);
}
}
final Canvas canvas = mCanvas;
canvas.clipRect(mDirtyRect, Op.REPLACE);
canvas.drawColor(Color.BLACK, PorterDuff.Mode.CLEAR);
if (mKeyboard == null) return;
final boolean isManualTemporaryUpperCase = mKeyboard.isManualTemporaryUpperCase();
final KeyDrawParams params = mKeyDrawParams;
if (mInvalidatedKey != null && mInvalidatedKeyRect.contains(mDirtyRect)) {
// Draw a single key.
final int keyDrawX = mInvalidatedKey.mX + mInvalidatedKey.mVisualInsetsLeft
+ getPaddingLeft();
final int keyDrawY = mInvalidatedKey.mY + getPaddingTop();
canvas.translate(keyDrawX, keyDrawY);
onBufferDrawKey(mInvalidatedKey, mKeyboard, canvas, mPaint, params,
isManualTemporaryUpperCase);
canvas.translate(-keyDrawX, -keyDrawY);
} else {
// Draw all keys.
for (final Key key : mKeyboard.mKeys) {
final int keyDrawX = key.mX + key.mVisualInsetsLeft + getPaddingLeft();
final int keyDrawY = key.mY + getPaddingTop();
canvas.translate(keyDrawX, keyDrawY);
onBufferDrawKey(key, mKeyboard, canvas, mPaint, params, isManualTemporaryUpperCase);
canvas.translate(-keyDrawX, -keyDrawY);
}
}
// Overlay a dark rectangle to dim the entire keyboard
if (mNeedsToDimBackground) {
mPaint.setColor((int) (mBackgroundDimAmount * 0xFF) << 24);
canvas.drawRect(0, 0, width, height, mPaint);
}
mInvalidatedKey = null;
mDirtyRect.setEmpty();
}
public void dimEntireKeyboard(boolean dimmed) {
final boolean needsRedrawing = mNeedsToDimBackground != dimmed;
mNeedsToDimBackground = dimmed;
if (needsRedrawing) {
invalidateAllKeys();
}
}
private static void onBufferDrawKey(final Key key, final Keyboard keyboard, final Canvas canvas,
Paint paint, KeyDrawParams params, boolean isManualTemporaryUpperCase) {
final boolean debugShowAlign = LatinImeLogger.sVISUALDEBUG;
// Draw key background.
if (!key.isSpacer()) {
final int bgWidth = key.mWidth - key.mVisualInsetsLeft - key.mVisualInsetsRight
+ params.mPadding.left + params.mPadding.right;
final int bgHeight = key.mHeight + params.mPadding.top + params.mPadding.bottom;
final int bgX = -params.mPadding.left;
final int bgY = -params.mPadding.top;
final int[] drawableState = key.getCurrentDrawableState();
final Drawable background = params.mKeyBackground;
background.setState(drawableState);
final Rect bounds = background.getBounds();
if (bgWidth != bounds.right || bgHeight != bounds.bottom) {
background.setBounds(0, 0, bgWidth, bgHeight);
}
canvas.translate(bgX, bgY);
background.draw(canvas);
if (debugShowAlign) {
drawRectangle(canvas, 0, 0, bgWidth, bgHeight, 0x80c00000, new Paint());
}
canvas.translate(-bgX, -bgY);
}
// Draw key top visuals.
final int keyWidth = key.mWidth - key.mVisualInsetsLeft - key.mVisualInsetsRight;
final int keyHeight = key.mHeight;
final float centerX = keyWidth * 0.5f;
final float centerY = keyHeight * 0.5f;
if (debugShowAlign) {
drawRectangle(canvas, 0, 0, keyWidth, keyHeight, 0x800000c0, new Paint());
}
// Draw key label.
final Drawable icon = key.getIcon();
float positionX = centerX;
if (key.mLabel != null) {
// Switch the character to uppercase if shift is pressed
final CharSequence label = keyboard.adjustLabelCase(key.mLabel);
// For characters, use large font. For labels like "Done", use smaller font.
paint.setTypeface(key.selectTypeface(params.mKeyTextStyle));
final int labelSize = key.selectTextSize(params.mKeyLetterSize,
params.mKeyLargeLetterSize, params.mKeyLabelSize, params.mKeyHintLabelSize);
paint.setTextSize(labelSize);
final float labelCharHeight = getCharHeight(KEY_LABEL_REFERENCE_CHAR, paint);
final float labelCharWidth = getCharWidth(KEY_LABEL_REFERENCE_CHAR, paint);
// Vertical label text alignment.
final float baseline = centerY + labelCharHeight / 2;
// Horizontal label text alignment
float labelWidth = 0;
if (key.isAlignLeft()) {
positionX = (int)params.mKeyLabelHorizontalPadding;
paint.setTextAlign(Align.LEFT);
} else if (key.isAlignRight()) {
positionX = keyWidth - (int)params.mKeyLabelHorizontalPadding;
paint.setTextAlign(Align.RIGHT);
} else if (key.isAlignLeftOfCenter()) {
// TODO: Parameterise this?
positionX = centerX - labelCharWidth * 7 / 4;
paint.setTextAlign(Align.LEFT);
} else if (key.hasLabelWithIconLeft() && icon != null) {
labelWidth = getLabelWidth(label, paint) + icon.getIntrinsicWidth()
+ LABEL_ICON_MARGIN * keyWidth;
positionX = centerX + labelWidth / 2;
paint.setTextAlign(Align.RIGHT);
} else if (key.hasLabelWithIconRight() && icon != null) {
labelWidth = getLabelWidth(label, paint) + icon.getIntrinsicWidth()
+ LABEL_ICON_MARGIN * keyWidth;
positionX = centerX - labelWidth / 2;
paint.setTextAlign(Align.LEFT);
} else {
positionX = centerX;
paint.setTextAlign(Align.CENTER);
}
if (key.needsXScale()) {
paint.setTextScaleX(
Math.min(1.0f, (keyWidth * MAX_LABEL_RATIO) / getLabelWidth(label, paint)));
}
if (key.hasUppercaseLetter() && isManualTemporaryUpperCase) {
paint.setColor(params.mKeyTextInactivatedColor);
} else {
paint.setColor(params.mKeyTextColor);
}
if (key.isEnabled()) {
// Set a drop shadow for the text
paint.setShadowLayer(params.mShadowRadius, 0, 0, params.mShadowColor);
} else {
// Make label invisible
paint.setColor(Color.TRANSPARENT);
}
canvas.drawText(label, 0, label.length(), positionX, baseline, paint);
// Turn off drop shadow and reset x-scale.
paint.setShadowLayer(0, 0, 0, 0);
paint.setTextScaleX(1.0f);
if (icon != null) {
final int iconWidth = icon.getIntrinsicWidth();
final int iconHeight = icon.getIntrinsicHeight();
final int iconY = (keyHeight - iconHeight) / 2;
if (key.hasLabelWithIconLeft()) {
final int iconX = (int)(centerX - labelWidth / 2);
drawIcon(canvas, icon, iconX, iconY, iconWidth, iconHeight);
} else if (key.hasLabelWithIconRight()) {
final int iconX = (int)(centerX + labelWidth / 2 - iconWidth);
drawIcon(canvas, icon, iconX, iconY, iconWidth, iconHeight);
}
}
if (debugShowAlign) {
final Paint line = new Paint();
drawHorizontalLine(canvas, baseline, keyWidth, 0xc0008000, line);
drawVerticalLine(canvas, positionX, keyHeight, 0xc0800080, line);
}
}
// Draw hint label.
if (key.mHintLabel != null) {
final CharSequence hint = key.mHintLabel;
final int hintColor;
final int hintSize;
if (key.hasHintLabel()) {
hintColor = params.mKeyHintLabelColor;
hintSize = params.mKeyHintLabelSize;
paint.setTypeface(Typeface.DEFAULT);
} else if (key.hasUppercaseLetter()) {
hintColor = isManualTemporaryUpperCase
? params.mKeyUppercaseLetterActivatedColor
: params.mKeyUppercaseLetterInactivatedColor;
hintSize = params.mKeyUppercaseLetterSize;
} else { // key.hasHintLetter()
hintColor = params.mKeyHintLetterColor;
hintSize = params.mKeyHintLetterSize;
}
paint.setColor(hintColor);
paint.setTextSize(hintSize);
final float hintX, hintY;
if (key.hasHintLabel()) {
// The hint label is placed just right of the key label. Used mainly on
// "phone number" layout.
// TODO: Generalize the following calculations.
hintX = positionX + getCharWidth(KEY_LABEL_REFERENCE_CHAR, paint) * 2;
hintY = centerY + getCharHeight(KEY_LABEL_REFERENCE_CHAR, paint) / 2;
paint.setTextAlign(Align.LEFT);
} else if (key.hasUppercaseLetter()) {
// The hint label is placed at top-right corner of the key. Used mainly on tablet.
hintX = keyWidth - params.mKeyUppercaseLetterPadding
- getCharWidth(KEY_LABEL_REFERENCE_CHAR, paint) / 2;
hintY = -paint.ascent();
paint.setTextAlign(Align.CENTER);
} else { // key.hasHintLetter()
// The hint label is placed at top-right corner of the key. Used mainly on phone.
hintX = keyWidth - params.mKeyHintLetterPadding
- getCharWidth(KEY_NUMERIC_HINT_LABEL_REFERENCE_CHAR, paint) / 2;
hintY = -paint.ascent();
paint.setTextAlign(Align.CENTER);
}
canvas.drawText(hint, 0, hint.length(), hintX, hintY, paint);
if (debugShowAlign) {
final Paint line = new Paint();
drawHorizontalLine(canvas, (int)hintY, keyWidth, 0xc0808000, line);
drawVerticalLine(canvas, (int)hintX, keyHeight, 0xc0808000, line);
}
}
// Draw key icon.
if (key.mLabel == null && icon != null) {
final int iconWidth = icon.getIntrinsicWidth();
final int iconHeight = icon.getIntrinsicHeight();
final int iconX, alignX;
final int iconY = (keyHeight - iconHeight) / 2;
if (key.isAlignLeft()) {
iconX = (int)params.mKeyLabelHorizontalPadding;
alignX = iconX;
} else if (key.isAlignRight()) {
iconX = keyWidth - (int)params.mKeyLabelHorizontalPadding - iconWidth;
alignX = iconX + iconWidth;
} else { // Align center
iconX = (keyWidth - iconWidth) / 2;
alignX = iconX + iconWidth / 2;
}
drawIcon(canvas, icon, iconX, iconY, iconWidth, iconHeight);
if (debugShowAlign) {
final Paint line = new Paint();
drawVerticalLine(canvas, alignX, keyHeight, 0xc0800080, line);
drawRectangle(canvas, iconX, iconY, iconWidth, iconHeight, 0x80c00000, line);
}
}
// Draw popup hint "..." at the bottom right corner of the key.
if ((key.hasPopupHint() && key.mMoreKeys != null && key.mMoreKeys.length > 0)
|| key.needsSpecialPopupHint()) {
paint.setTextSize(params.mKeyHintLetterSize);
paint.setColor(params.mKeyHintLabelColor);
paint.setTextAlign(Align.CENTER);
final float hintX = keyWidth - params.mKeyHintLetterPadding
- getCharWidth(KEY_LABEL_REFERENCE_CHAR, paint) / 2;
final float hintY = keyHeight - params.mKeyPopupHintLetterPadding;
canvas.drawText(POPUP_HINT_CHAR, hintX, hintY, paint);
if (debugShowAlign) {
final Paint line = new Paint();
drawHorizontalLine(canvas, (int)hintY, keyWidth, 0xc0808000, line);
drawVerticalLine(canvas, (int)hintX, keyHeight, 0xc0808000, line);
}
}
}
private static final Rect sTextBounds = new Rect();
private static int getCharGeometryCacheKey(char reference, Paint paint) {
final int labelSize = (int)paint.getTextSize();
final Typeface face = paint.getTypeface();
final int codePointOffset = reference << 15;
if (face == Typeface.DEFAULT) {
return codePointOffset + labelSize;
} else if (face == Typeface.DEFAULT_BOLD) {
return codePointOffset + labelSize + 0x1000;
} else if (face == Typeface.MONOSPACE) {
return codePointOffset + labelSize + 0x2000;
} else {
return codePointOffset + labelSize;
}
}
private static float getCharHeight(char[] character, Paint paint) {
final Integer key = getCharGeometryCacheKey(character[0], paint);
final Float cachedValue = sTextHeightCache.get(key);
if (cachedValue != null)
return cachedValue;
paint.getTextBounds(character, 0, 1, sTextBounds);
final float height = sTextBounds.height();
sTextHeightCache.put(key, height);
return height;
}
private static float getCharWidth(char[] character, Paint paint) {
final Integer key = getCharGeometryCacheKey(character[0], paint);
final Float cachedValue = sTextWidthCache.get(key);
if (cachedValue != null)
return cachedValue;
paint.getTextBounds(character, 0, 1, sTextBounds);
final float width = sTextBounds.width();
sTextWidthCache.put(key, width);
return width;
}
private static float getLabelWidth(CharSequence label, Paint paint) {
paint.getTextBounds(label.toString(), 0, label.length(), sTextBounds);
return sTextBounds.width();
}
public float getDefaultLabelWidth(CharSequence label, Paint paint) {
paint.setTextSize(mKeyDrawParams.mKeyLabelSize);
paint.setTypeface(mKeyDrawParams.mKeyTextStyle);
return getLabelWidth(label, paint);
}
private static void drawIcon(Canvas canvas, Drawable icon, int x, int y, int width,
int height) {
canvas.translate(x, y);
icon.setBounds(0, 0, width, height);
icon.draw(canvas);
canvas.translate(-x, -y);
}
private static void drawHorizontalLine(Canvas canvas, float y, float w, int color,
Paint paint) {
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(1.0f);
paint.setColor(color);
canvas.drawLine(0, y, w, y, paint);
}
private static void drawVerticalLine(Canvas canvas, float x, float h, int color, Paint paint) {
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(1.0f);
paint.setColor(color);
canvas.drawLine(x, 0, x, h, paint);
}
private static void drawRectangle(Canvas canvas, float x, float y, float w, float h, int color,
Paint paint) {
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeWidth(1.0f);
paint.setColor(color);
canvas.translate(x, y);
canvas.drawRect(0, 0, w, h, paint);
canvas.translate(-x, -y);
}
public void cancelAllMessages() {
mDrawingHandler.cancelAllMessages();
}
// Called by {@link PointerTracker} constructor to create a TextView.
@Override
public TextView inflateKeyPreviewText() {
final Context context = getContext();
if (mKeyPreviewLayoutId != 0) {
return (TextView)LayoutInflater.from(context).inflate(mKeyPreviewLayoutId, null);
} else {
return new TextView(context);
}
}
@Override
public void showKeyPreview(int keyIndex, PointerTracker tracker) {
if (mShowKeyPreviewPopup) {
mDrawingHandler.showKeyPreview(mDelayBeforePreview, keyIndex, tracker);
}
}
@Override
public void cancelShowKeyPreview(PointerTracker tracker) {
mDrawingHandler.cancelShowKeyPreview(tracker);
}
@Override
public void dismissKeyPreview(PointerTracker tracker) {
mDrawingHandler.cancelShowKeyPreview(tracker);
mDrawingHandler.dismissKeyPreview(mDelayAfterPreview, tracker);
}
private void addKeyPreview(TextView keyPreview) {
if (mPreviewPlacer == null) {
mPreviewPlacer = new RelativeLayout(getContext());
final ViewGroup windowContentView =
(ViewGroup)getRootView().findViewById(android.R.id.content);
windowContentView.addView(mPreviewPlacer);
}
mPreviewPlacer.addView(
keyPreview, FrameLayoutCompatUtils.newLayoutParam(mPreviewPlacer, 0, 0));
}
private void showKey(final int keyIndex, PointerTracker tracker) {
final TextView previewText = tracker.getKeyPreviewText();
// If the key preview has no parent view yet, add it to the ViewGroup which can place
// key preview absolutely in SoftInputWindow.
if (previewText.getParent() == null) {
addKeyPreview(previewText);
}
mDrawingHandler.cancelDismissKeyPreview(tracker);
final Key key = tracker.getKey(keyIndex);
// If keyIndex is invalid or IME is already closed, we must not show key preview.
// Trying to show key preview while root window is closed causes
// WindowManager.BadTokenException.
if (key == null)
return;
final KeyPreviewDrawParams params = mKeyPreviewDrawParams;
final int keyDrawX = key.mX + key.mVisualInsetsLeft;
final int keyDrawWidth = key.mWidth - key.mVisualInsetsLeft - key.mVisualInsetsRight;
// What we show as preview should match what we show on key top in onBufferDraw().
if (key.mLabel != null) {
// TODO Should take care of temporaryShiftLabel here.
previewText.setCompoundDrawables(null, null, null, null);
if (key.mLabel.length() > 1) {
previewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, params.mKeyLetterSize);
previewText.setTypeface(Typeface.DEFAULT_BOLD);
} else {
previewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, params.mPreviewTextSize);
previewText.setTypeface(params.mKeyTextStyle);
}
previewText.setText(mKeyboard.adjustLabelCase(key.mLabel));
} else {
final Drawable previewIcon = key.getPreviewIcon();
previewText.setCompoundDrawables(null, null, null,
previewIcon != null ? previewIcon : key.getIcon());
previewText.setText(null);
}
previewText.setBackgroundDrawable(params.mPreviewBackground);
previewText.measure(
ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
final int previewWidth = Math.max(previewText.getMeasuredWidth(), keyDrawWidth
+ previewText.getPaddingLeft() + previewText.getPaddingRight());
final int previewHeight = params.mPreviewHeight;
getLocationInWindow(params.mCoordinates);
int previewX = keyDrawX - (previewWidth - keyDrawWidth) / 2 + params.mCoordinates[0];
final int previewY = key.mY - previewHeight
+ params.mCoordinates[1] + params.mPreviewOffset;
if (previewX < 0 && params.mPreviewLeftBackground != null) {
previewText.setBackgroundDrawable(params.mPreviewLeftBackground);
previewX = 0;
} else if (previewX + previewWidth > getWidth() && params.mPreviewRightBackground != null) {
previewText.setBackgroundDrawable(params.mPreviewRightBackground);
previewX = getWidth() - previewWidth;
}
// Set the preview background state
previewText.getBackground().setState(
key.mMoreKeys != null ? LONG_PRESSABLE_STATE_SET : EMPTY_STATE_SET);
previewText.setTextColor(params.mPreviewTextColor);
FrameLayoutCompatUtils.placeViewAt(
previewText, previewX, previewY, previewWidth, previewHeight);
previewText.setVisibility(VISIBLE);
}
/**
* Requests a redraw of the entire keyboard. Calling {@link #invalidate} is not sufficient
* because the keyboard renders the keys to an off-screen buffer and an invalidate() only
* draws the cached buffer.
* @see #invalidateKey(Key)
*/
public void invalidateAllKeys() {
mDirtyRect.union(0, 0, getWidth(), getHeight());
mBufferNeedsUpdate = true;
invalidate();
}
/**
* Invalidates a key so that it will be redrawn on the next repaint. Use this method if only
* one key is changing it's content. Any changes that affect the position or size of the key
* may not be honored.
* @param key key in the attached {@link Keyboard}.
* @see #invalidateAllKeys
*/
@Override
public void invalidateKey(Key key) {
if (key == null)
return;
mInvalidatedKey = key;
final int x = key.mX + getPaddingLeft();
final int y = key.mY + getPaddingTop();
mInvalidatedKeyRect.set(x, y, x + key.mWidth, y + key.mHeight);
mDirtyRect.union(mInvalidatedKeyRect);
mBufferNeedsUpdate = true;
invalidate(mInvalidatedKeyRect);
}
public void closing() {
PointerTracker.dismissAllKeyPreviews();
cancelAllMessages();
mDirtyRect.union(0, 0, getWidth(), getHeight());
requestLayout();
}
@Override
public boolean dismissMoreKeysPanel() {
return false;
}
public void purgeKeyboardAndClosing() {
mKeyboard = null;
closing();
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
closing();
if (mPreviewPlacer != null) {
mPreviewPlacer.removeAllViews();
}
if (mBuffer != null) {
mBuffer.recycle();
mBuffer = null;
}
}
}