| /* |
| * Copyright (C) 2006 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 android.text.style; |
| |
| import android.graphics.Canvas; |
| import android.graphics.Paint; |
| import android.graphics.Path; |
| import android.graphics.Path.Direction; |
| import android.os.Parcel; |
| import android.text.Layout; |
| import android.text.ParcelableSpan; |
| import android.text.Spanned; |
| import android.text.TextUtils; |
| |
| public class BulletSpan implements LeadingMarginSpan, ParcelableSpan { |
| private final int mGapWidth; |
| private final boolean mWantColor; |
| private final int mColor; |
| |
| private static final int BULLET_RADIUS = 3; |
| private static Path sBulletPath = null; |
| public static final int STANDARD_GAP_WIDTH = 2; |
| |
| public BulletSpan() { |
| mGapWidth = STANDARD_GAP_WIDTH; |
| mWantColor = false; |
| mColor = 0; |
| } |
| |
| public BulletSpan(int gapWidth) { |
| mGapWidth = gapWidth; |
| mWantColor = false; |
| mColor = 0; |
| } |
| |
| public BulletSpan(int gapWidth, int color) { |
| mGapWidth = gapWidth; |
| mWantColor = true; |
| mColor = color; |
| } |
| |
| public BulletSpan(Parcel src) { |
| mGapWidth = src.readInt(); |
| mWantColor = src.readInt() != 0; |
| mColor = src.readInt(); |
| } |
| |
| public int getSpanTypeId() { |
| return getSpanTypeIdInternal(); |
| } |
| |
| /** @hide */ |
| public int getSpanTypeIdInternal() { |
| return TextUtils.BULLET_SPAN; |
| } |
| |
| public int describeContents() { |
| return 0; |
| } |
| |
| public void writeToParcel(Parcel dest, int flags) { |
| writeToParcelInternal(dest, flags); |
| } |
| |
| /** @hide */ |
| public void writeToParcelInternal(Parcel dest, int flags) { |
| dest.writeInt(mGapWidth); |
| dest.writeInt(mWantColor ? 1 : 0); |
| dest.writeInt(mColor); |
| } |
| |
| public int getLeadingMargin(boolean first) { |
| return 2 * BULLET_RADIUS + mGapWidth; |
| } |
| |
| public void drawLeadingMargin(Canvas c, Paint p, int x, int dir, |
| int top, int baseline, int bottom, |
| CharSequence text, int start, int end, |
| boolean first, Layout l) { |
| if (((Spanned) text).getSpanStart(this) == start) { |
| Paint.Style style = p.getStyle(); |
| int oldcolor = 0; |
| |
| if (mWantColor) { |
| oldcolor = p.getColor(); |
| p.setColor(mColor); |
| } |
| |
| p.setStyle(Paint.Style.FILL); |
| |
| if (c.isHardwareAccelerated()) { |
| if (sBulletPath == null) { |
| sBulletPath = new Path(); |
| // Bullet is slightly better to avoid aliasing artifacts on mdpi devices. |
| sBulletPath.addCircle(0.0f, 0.0f, 1.2f * BULLET_RADIUS, Direction.CW); |
| } |
| |
| c.save(); |
| c.translate(x + dir * BULLET_RADIUS, (top + bottom) / 2.0f); |
| c.drawPath(sBulletPath, p); |
| c.restore(); |
| } else { |
| c.drawCircle(x + dir * BULLET_RADIUS, (top + bottom) / 2.0f, BULLET_RADIUS, p); |
| } |
| |
| if (mWantColor) { |
| p.setColor(oldcolor); |
| } |
| |
| p.setStyle(style); |
| } |
| } |
| } |