| /* |
| * 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.content.res; |
| |
| import android.compat.annotation.UnsupportedAppUsage; |
| import android.graphics.Color; |
| import android.graphics.Paint; |
| import android.graphics.Rect; |
| import android.graphics.Typeface; |
| import android.text.Annotation; |
| import android.text.Spannable; |
| import android.text.SpannableString; |
| import android.text.SpannedString; |
| import android.text.TextPaint; |
| import android.text.TextUtils; |
| import android.text.style.AbsoluteSizeSpan; |
| import android.text.style.BackgroundColorSpan; |
| import android.text.style.BulletSpan; |
| import android.text.style.CharacterStyle; |
| import android.text.style.ForegroundColorSpan; |
| import android.text.style.LineHeightSpan; |
| import android.text.style.RelativeSizeSpan; |
| import android.text.style.StrikethroughSpan; |
| import android.text.style.StyleSpan; |
| import android.text.style.SubscriptSpan; |
| import android.text.style.SuperscriptSpan; |
| import android.text.style.TextAppearanceSpan; |
| import android.text.style.TypefaceSpan; |
| import android.text.style.URLSpan; |
| import android.text.style.UnderlineSpan; |
| import android.util.Log; |
| import android.util.SparseArray; |
| |
| import com.android.internal.annotations.GuardedBy; |
| |
| import java.util.Arrays; |
| |
| /** |
| * Conveniences for retrieving data out of a compiled string resource. |
| * |
| * {@hide} |
| */ |
| final class StringBlock { |
| private static final String TAG = "AssetManager"; |
| private static final boolean localLOGV = false; |
| |
| private final long mNative; |
| private final boolean mUseSparse; |
| private final boolean mOwnsNative; |
| |
| private CharSequence[] mStrings; |
| private SparseArray<CharSequence> mSparseStrings; |
| |
| @GuardedBy("this") private boolean mOpen = true; |
| |
| StyleIDs mStyleIDs = null; |
| |
| public StringBlock(byte[] data, boolean useSparse) { |
| mNative = nativeCreate(data, 0, data.length); |
| mUseSparse = useSparse; |
| mOwnsNative = true; |
| if (localLOGV) Log.v(TAG, "Created string block " + this |
| + ": " + nativeGetSize(mNative)); |
| } |
| |
| public StringBlock(byte[] data, int offset, int size, boolean useSparse) { |
| mNative = nativeCreate(data, offset, size); |
| mUseSparse = useSparse; |
| mOwnsNative = true; |
| if (localLOGV) Log.v(TAG, "Created string block " + this |
| + ": " + nativeGetSize(mNative)); |
| } |
| |
| @UnsupportedAppUsage |
| public CharSequence get(int idx) { |
| synchronized (this) { |
| if (mStrings != null) { |
| CharSequence res = mStrings[idx]; |
| if (res != null) { |
| return res; |
| } |
| } else if (mSparseStrings != null) { |
| CharSequence res = mSparseStrings.get(idx); |
| if (res != null) { |
| return res; |
| } |
| } else { |
| final int num = nativeGetSize(mNative); |
| if (mUseSparse && num > 250) { |
| mSparseStrings = new SparseArray<CharSequence>(); |
| } else { |
| mStrings = new CharSequence[num]; |
| } |
| } |
| String str = nativeGetString(mNative, idx); |
| CharSequence res = str; |
| int[] style = nativeGetStyle(mNative, idx); |
| if (localLOGV) Log.v(TAG, "Got string: " + str); |
| if (localLOGV) Log.v(TAG, "Got styles: " + Arrays.toString(style)); |
| if (style != null) { |
| if (mStyleIDs == null) { |
| mStyleIDs = new StyleIDs(); |
| } |
| |
| // the style array is a flat array of <type, start, end> hence |
| // the magic constant 3. |
| for (int styleIndex = 0; styleIndex < style.length; styleIndex += 3) { |
| int styleId = style[styleIndex]; |
| |
| if (styleId == mStyleIDs.boldId || styleId == mStyleIDs.italicId |
| || styleId == mStyleIDs.underlineId || styleId == mStyleIDs.ttId |
| || styleId == mStyleIDs.bigId || styleId == mStyleIDs.smallId |
| || styleId == mStyleIDs.subId || styleId == mStyleIDs.supId |
| || styleId == mStyleIDs.strikeId || styleId == mStyleIDs.listItemId |
| || styleId == mStyleIDs.marqueeId) { |
| // id already found skip to next style |
| continue; |
| } |
| |
| String styleTag = nativeGetString(mNative, styleId); |
| |
| if (styleTag.equals("b")) { |
| mStyleIDs.boldId = styleId; |
| } else if (styleTag.equals("i")) { |
| mStyleIDs.italicId = styleId; |
| } else if (styleTag.equals("u")) { |
| mStyleIDs.underlineId = styleId; |
| } else if (styleTag.equals("tt")) { |
| mStyleIDs.ttId = styleId; |
| } else if (styleTag.equals("big")) { |
| mStyleIDs.bigId = styleId; |
| } else if (styleTag.equals("small")) { |
| mStyleIDs.smallId = styleId; |
| } else if (styleTag.equals("sup")) { |
| mStyleIDs.supId = styleId; |
| } else if (styleTag.equals("sub")) { |
| mStyleIDs.subId = styleId; |
| } else if (styleTag.equals("strike")) { |
| mStyleIDs.strikeId = styleId; |
| } else if (styleTag.equals("li")) { |
| mStyleIDs.listItemId = styleId; |
| } else if (styleTag.equals("marquee")) { |
| mStyleIDs.marqueeId = styleId; |
| } |
| } |
| |
| res = applyStyles(str, style, mStyleIDs); |
| } |
| if (mStrings != null) mStrings[idx] = res; |
| else mSparseStrings.put(idx, res); |
| return res; |
| } |
| } |
| |
| @Override |
| protected void finalize() throws Throwable { |
| try { |
| super.finalize(); |
| } finally { |
| close(); |
| } |
| } |
| |
| public void close() throws Throwable { |
| synchronized (this) { |
| if (mOpen) { |
| mOpen = false; |
| |
| if (mOwnsNative) { |
| nativeDestroy(mNative); |
| } |
| } |
| } |
| } |
| |
| static final class StyleIDs { |
| private int boldId = -1; |
| private int italicId = -1; |
| private int underlineId = -1; |
| private int ttId = -1; |
| private int bigId = -1; |
| private int smallId = -1; |
| private int subId = -1; |
| private int supId = -1; |
| private int strikeId = -1; |
| private int listItemId = -1; |
| private int marqueeId = -1; |
| } |
| |
| private CharSequence applyStyles(String str, int[] style, StyleIDs ids) { |
| if (style.length == 0) |
| return str; |
| |
| SpannableString buffer = new SpannableString(str); |
| int i=0; |
| while (i < style.length) { |
| int type = style[i]; |
| if (localLOGV) Log.v(TAG, "Applying style span id=" + type |
| + ", start=" + style[i+1] + ", end=" + style[i+2]); |
| |
| |
| if (type == ids.boldId) { |
| buffer.setSpan(new StyleSpan(Typeface.BOLD), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } else if (type == ids.italicId) { |
| buffer.setSpan(new StyleSpan(Typeface.ITALIC), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } else if (type == ids.underlineId) { |
| buffer.setSpan(new UnderlineSpan(), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } else if (type == ids.ttId) { |
| buffer.setSpan(new TypefaceSpan("monospace"), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } else if (type == ids.bigId) { |
| buffer.setSpan(new RelativeSizeSpan(1.25f), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } else if (type == ids.smallId) { |
| buffer.setSpan(new RelativeSizeSpan(0.8f), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } else if (type == ids.subId) { |
| buffer.setSpan(new SubscriptSpan(), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } else if (type == ids.supId) { |
| buffer.setSpan(new SuperscriptSpan(), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } else if (type == ids.strikeId) { |
| buffer.setSpan(new StrikethroughSpan(), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } else if (type == ids.listItemId) { |
| addParagraphSpan(buffer, new BulletSpan(10), |
| style[i+1], style[i+2]+1); |
| } else if (type == ids.marqueeId) { |
| buffer.setSpan(TextUtils.TruncateAt.MARQUEE, |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_INCLUSIVE_INCLUSIVE); |
| } else { |
| String tag = nativeGetString(mNative, type); |
| |
| if (tag.startsWith("font;")) { |
| String sub; |
| |
| sub = subtag(tag, ";height="); |
| if (sub != null) { |
| int size = Integer.parseInt(sub); |
| addParagraphSpan(buffer, new Height(size), |
| style[i+1], style[i+2]+1); |
| } |
| |
| sub = subtag(tag, ";size="); |
| if (sub != null) { |
| int size = Integer.parseInt(sub); |
| buffer.setSpan(new AbsoluteSizeSpan(size, true), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } |
| |
| sub = subtag(tag, ";fgcolor="); |
| if (sub != null) { |
| buffer.setSpan(getColor(sub, true), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } |
| |
| sub = subtag(tag, ";color="); |
| if (sub != null) { |
| buffer.setSpan(getColor(sub, true), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } |
| |
| sub = subtag(tag, ";bgcolor="); |
| if (sub != null) { |
| buffer.setSpan(getColor(sub, false), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } |
| |
| sub = subtag(tag, ";face="); |
| if (sub != null) { |
| buffer.setSpan(new TypefaceSpan(sub), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } |
| } else if (tag.startsWith("a;")) { |
| String sub; |
| |
| sub = subtag(tag, ";href="); |
| if (sub != null) { |
| buffer.setSpan(new URLSpan(sub), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } |
| } else if (tag.startsWith("annotation;")) { |
| int len = tag.length(); |
| int next; |
| |
| for (int t = tag.indexOf(';'); t < len; t = next) { |
| int eq = tag.indexOf('=', t); |
| if (eq < 0) { |
| break; |
| } |
| |
| next = tag.indexOf(';', eq); |
| if (next < 0) { |
| next = len; |
| } |
| |
| String key = tag.substring(t + 1, eq); |
| String value = tag.substring(eq + 1, next); |
| |
| buffer.setSpan(new Annotation(key, value), |
| style[i+1], style[i+2]+1, |
| Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } |
| } |
| } |
| |
| i += 3; |
| } |
| return new SpannedString(buffer); |
| } |
| |
| /** |
| * Returns a span for the specified color string representation. |
| * If the specified string does not represent a color (null, empty, etc.) |
| * the color black is returned instead. |
| * |
| * @param color The color as a string. Can be a resource reference, |
| * hexadecimal, octal or a name |
| * @param foreground True if the color will be used as the foreground color, |
| * false otherwise |
| * |
| * @return A CharacterStyle |
| * |
| * @see Color#parseColor(String) |
| */ |
| private static CharacterStyle getColor(String color, boolean foreground) { |
| int c = 0xff000000; |
| |
| if (!TextUtils.isEmpty(color)) { |
| if (color.startsWith("@")) { |
| Resources res = Resources.getSystem(); |
| String name = color.substring(1); |
| int colorRes = res.getIdentifier(name, "color", "android"); |
| if (colorRes != 0) { |
| ColorStateList colors = res.getColorStateList(colorRes, null); |
| if (foreground) { |
| return new TextAppearanceSpan(null, 0, 0, colors, null); |
| } else { |
| c = colors.getDefaultColor(); |
| } |
| } |
| } else { |
| try { |
| c = Color.parseColor(color); |
| } catch (IllegalArgumentException e) { |
| c = Color.BLACK; |
| } |
| } |
| } |
| |
| if (foreground) { |
| return new ForegroundColorSpan(c); |
| } else { |
| return new BackgroundColorSpan(c); |
| } |
| } |
| |
| /** |
| * If a translator has messed up the edges of paragraph-level markup, |
| * fix it to actually cover the entire paragraph that it is attached to |
| * instead of just whatever range they put it on. |
| */ |
| private static void addParagraphSpan(Spannable buffer, Object what, |
| int start, int end) { |
| int len = buffer.length(); |
| |
| if (start != 0 && start != len && buffer.charAt(start - 1) != '\n') { |
| for (start--; start > 0; start--) { |
| if (buffer.charAt(start - 1) == '\n') { |
| break; |
| } |
| } |
| } |
| |
| if (end != 0 && end != len && buffer.charAt(end - 1) != '\n') { |
| for (end++; end < len; end++) { |
| if (buffer.charAt(end - 1) == '\n') { |
| break; |
| } |
| } |
| } |
| |
| buffer.setSpan(what, start, end, Spannable.SPAN_PARAGRAPH); |
| } |
| |
| private static String subtag(String full, String attribute) { |
| int start = full.indexOf(attribute); |
| if (start < 0) { |
| return null; |
| } |
| |
| start += attribute.length(); |
| int end = full.indexOf(';', start); |
| |
| if (end < 0) { |
| return full.substring(start); |
| } else { |
| return full.substring(start, end); |
| } |
| } |
| |
| /** |
| * Forces the text line to be the specified height, shrinking/stretching |
| * the ascent if possible, or the descent if shrinking the ascent further |
| * will make the text unreadable. |
| */ |
| private static class Height implements LineHeightSpan.WithDensity { |
| private int mSize; |
| private static float sProportion = 0; |
| |
| public Height(int size) { |
| mSize = size; |
| } |
| |
| public void chooseHeight(CharSequence text, int start, int end, |
| int spanstartv, int v, |
| Paint.FontMetricsInt fm) { |
| // Should not get called, at least not by StaticLayout. |
| chooseHeight(text, start, end, spanstartv, v, fm, null); |
| } |
| |
| public void chooseHeight(CharSequence text, int start, int end, |
| int spanstartv, int v, |
| Paint.FontMetricsInt fm, TextPaint paint) { |
| int size = mSize; |
| if (paint != null) { |
| size *= paint.density; |
| } |
| |
| if (fm.bottom - fm.top < size) { |
| fm.top = fm.bottom - size; |
| fm.ascent = fm.ascent - size; |
| } else { |
| if (sProportion == 0) { |
| /* |
| * Calculate what fraction of the nominal ascent |
| * the height of a capital letter actually is, |
| * so that we won't reduce the ascent to less than |
| * that unless we absolutely have to. |
| */ |
| |
| Paint p = new Paint(); |
| p.setTextSize(100); |
| Rect r = new Rect(); |
| p.getTextBounds("ABCDEFG", 0, 7, r); |
| |
| sProportion = (r.top) / p.ascent(); |
| } |
| |
| int need = (int) Math.ceil(-fm.top * sProportion); |
| |
| if (size - fm.descent >= need) { |
| /* |
| * It is safe to shrink the ascent this much. |
| */ |
| |
| fm.top = fm.bottom - size; |
| fm.ascent = fm.descent - size; |
| } else if (size >= need) { |
| /* |
| * We can't show all the descent, but we can at least |
| * show all the ascent. |
| */ |
| |
| fm.top = fm.ascent = -need; |
| fm.bottom = fm.descent = fm.top + size; |
| } else { |
| /* |
| * Show as much of the ascent as we can, and no descent. |
| */ |
| |
| fm.top = fm.ascent = -size; |
| fm.bottom = fm.descent = 0; |
| } |
| } |
| } |
| } |
| |
| /** |
| * Create from an existing string block native object. This is |
| * -extremely- dangerous -- only use it if you absolutely know what you |
| * are doing! The given native object must exist for the entire lifetime |
| * of this newly creating StringBlock. |
| */ |
| @UnsupportedAppUsage |
| StringBlock(long obj, boolean useSparse) { |
| mNative = obj; |
| mUseSparse = useSparse; |
| mOwnsNative = false; |
| if (localLOGV) Log.v(TAG, "Created string block " + this |
| + ": " + nativeGetSize(mNative)); |
| } |
| |
| private static native long nativeCreate(byte[] data, |
| int offset, |
| int size); |
| private static native int nativeGetSize(long obj); |
| private static native String nativeGetString(long obj, int idx); |
| private static native int[] nativeGetStyle(long obj, int idx); |
| private static native void nativeDestroy(long obj); |
| } |