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/*
* 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 android.graphics;
import com.android.ide.common.rendering.api.LayoutLog;
import com.android.layoutlib.bridge.Bridge;
import com.android.layoutlib.bridge.impl.DelegateManager;
import com.android.layoutlib.bridge.impl.FontLoader;
import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
import android.content.res.AssetManager;
import java.awt.Font;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
/**
* Delegate implementing the native methods of android.graphics.Typeface
*
* Through the layoutlib_create tool, the original native methods of Typeface have been replaced
* by calls to methods of the same name in this delegate class.
*
* This class behaves like the original native implementation, but in Java, keeping previously
* native data into its own objects and mapping them to int that are sent back and forth between
* it and the original Typeface class.
*
* @see DelegateManager
*
*/
public final class Typeface_Delegate {
private static final String SYSTEM_FONTS = "/system/fonts/";
// ---- delegate manager ----
private static final DelegateManager<Typeface_Delegate> sManager =
new DelegateManager<Typeface_Delegate>(Typeface_Delegate.class);
// ---- delegate helper data ----
private static final String DEFAULT_FAMILY = "sans-serif";
private static FontLoader sFontLoader;
private static final List<Typeface_Delegate> sPostInitDelegate =
new ArrayList<Typeface_Delegate>();
// ---- delegate data ----
private final String mFamily;
private int mStyle;
private List<Font> mFonts;
// ---- Public Helper methods ----
public static synchronized void init(FontLoader fontLoader) {
sFontLoader = fontLoader;
for (Typeface_Delegate delegate : sPostInitDelegate) {
delegate.init();
}
sPostInitDelegate.clear();
}
public static Typeface_Delegate getDelegate(long nativeTypeface) {
return sManager.getDelegate(nativeTypeface);
}
public static List<Font> getFonts(Typeface typeface) {
return getFonts(typeface.native_instance);
}
public static List<Font> getFonts(long native_int) {
Typeface_Delegate delegate = sManager.getDelegate(native_int);
if (delegate == null) {
return null;
}
return delegate.getFonts();
}
public List<Font> getFonts() {
return mFonts;
}
// ---- native methods ----
@LayoutlibDelegate
/*package*/ static synchronized long nativeCreate(String familyName, int style) {
if (familyName == null) {
familyName = DEFAULT_FAMILY;
}
Typeface_Delegate newDelegate = new Typeface_Delegate(familyName, style);
if (sFontLoader != null) {
newDelegate.init();
} else {
// font loader has not been initialized yet, add the delegate to a list of delegates
// to init when the font loader is initialized.
// There won't be any rendering before this happens anyway.
sPostInitDelegate.add(newDelegate);
}
return sManager.addNewDelegate(newDelegate);
}
@LayoutlibDelegate
/*package*/ static synchronized long nativeCreateFromTypeface(long native_instance, int style) {
Typeface_Delegate delegate = sManager.getDelegate(native_instance);
if (delegate == null) {
return 0;
}
Typeface_Delegate newDelegate = new Typeface_Delegate(delegate.mFamily, style);
if (sFontLoader != null) {
newDelegate.init();
} else {
// font loader has not been initialized yet, add the delegate to a list of delegates
// to init when the font loader is initialized.
// There won't be any rendering before this happens anyway.
sPostInitDelegate.add(newDelegate);
}
return sManager.addNewDelegate(newDelegate);
}
@LayoutlibDelegate
/*package*/ static synchronized long nativeCreateFromAsset(AssetManager mgr, String path) {
Bridge.getLog().fidelityWarning(LayoutLog.TAG_UNSUPPORTED,
"Typeface.createFromAsset() is not supported.", null /*throwable*/, null /*data*/);
return 0;
}
@LayoutlibDelegate
/*package*/ static synchronized long nativeCreateFromFile(String path) {
if (path.startsWith(SYSTEM_FONTS) ) {
String relativePath = path.substring(SYSTEM_FONTS.length());
File f = new File(sFontLoader.getOsFontsLocation(), relativePath);
try {
Font font = Font.createFont(Font.TRUETYPE_FONT, f);
if (font != null) {
Typeface_Delegate newDelegate = new Typeface_Delegate(font);
return sManager.addNewDelegate(newDelegate);
}
} catch (Exception e) {
Bridge.getLog().fidelityWarning(LayoutLog.TAG_BROKEN,
String.format("Unable to load font %1$s", relativePath),
null /*throwable*/, null /*data*/);
}
} else {
Bridge.getLog().fidelityWarning(LayoutLog.TAG_UNSUPPORTED,
"Typeface.createFromFile() can only work with platform fonts located in " +
SYSTEM_FONTS,
null /*throwable*/, null /*data*/);
}
// return a copy of the base font
return nativeCreate(null, 0);
}
@LayoutlibDelegate
/*package*/ static void nativeUnref(long native_instance) {
sManager.removeJavaReferenceFor(native_instance);
}
@LayoutlibDelegate
/*package*/ static int nativeGetStyle(long native_instance) {
Typeface_Delegate delegate = sManager.getDelegate(native_instance);
if (delegate == null) {
return 0;
}
return delegate.mStyle;
}
// ---- Private delegate/helper methods ----
private Typeface_Delegate(String family, int style) {
mFamily = family;
mStyle = style;
}
private Typeface_Delegate(Font font) {
mFamily = font.getFamily();
mStyle = Typeface.NORMAL;
mFonts = sFontLoader.getFallbackFonts(mStyle);
// insert the font glyph first.
mFonts.add(0, font);
}
private void init() {
mFonts = sFontLoader.getFont(mFamily, mStyle);
}
}
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