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/* Copyright 2013 Paul LeBeau, Cave Rock Software Ltd. /* w w w . ja v a2 s .com*/ 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. */ // NOTICE: This file has been modified by Abid H. Mujtaba. Its contents differ from the original. package com.caverock.androidsvg; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.lang.reflect.Method; import java.util.HashMap; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Paint; import android.graphics.drawable.Drawable; import android.graphics.drawable.PictureDrawable; import android.net.Uri; import android.util.AttributeSet; import android.util.Log; import android.view.View; import android.widget.ImageView; /** * SVGImageView is a View widget that allows users to include SVG images in their layouts. * <p/> * It is implemented as a thin layer over {@code android.widget.ImageView}. * <p/> * In its present form it has one significant limitation. It uses the {@link SVG#renderToPicture()} * method. That means that SVG documents that use {@code <mask>} elements will not display correctly. * * @attr ref R.styleable#SVGImageView_svg */ public class SVGImageView extends ImageView { private static Method setLayerTypeMethod = null; private boolean cache; // Flag that declares whether drawable should be cached or not. private Object key; // Key for mapCache. We need to use Object here because it can be a String, URI or ResourceId based on what is set. private static HashMap<Object, Drawable> mapCache = new HashMap<Object, Drawable>(); // This is the object that maps Keys to Drawables thereby implementing the Drawable map. { try { setLayerTypeMethod = View.class.getMethod("setLayerType", Integer.TYPE, Paint.class); } catch (NoSuchMethodException e) { /* do nothing */ } } public SVGImageView(Context context) { super(context); } public SVGImageView(Context context, AttributeSet attrs) { super(context, attrs, 0); init(attrs, 0); } public SVGImageView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(attrs, defStyle); } private void init(AttributeSet attrs, int defStyle) { TypedArray a = getContext().getTheme() .obtainStyledAttributes(attrs, R.styleable.SVGImageView, defStyle, 0); try { String asset = a.getString(R.styleable.SVGImageView_asset); cache = a.getBoolean(R.styleable.SVGImageView_cache, false); // NOTE: By this logic svg:asset OVERRIDES svg:svg so that if both attributes are present only svg:asset is used. if (asset != null) // This indicates that the user has explicitly asked for the asset to be used by using svg:asset rather than svg:svg attribute. { key = asset; setImageAsset(asset); } else { int resourceId = a.getResourceId(R.styleable.SVGImageView_svg, -1); if (resourceId != -1) { key = resourceId; setImageResource(resourceId); return; } String url = a.getString(R.styleable.SVGImageView_svg); if (url != null) { Uri uri = Uri.parse(url); key = uri; if (internalSetImageURI(uri)) return; // Last chance, try loading it as an asset filename key = url; setImageAsset(url); } } } finally { a.recycle(); } } /** * Load an SVG image from the given resource id. */ @Override public void setImageResource(int resourceId) { try { if (cache && mapCache.containsKey(key)) // If cache is set and mapCache contains the key used we pull the drawable from the cache to use rather than from the svg { setDrawableFromCache(); } else { SVG svg = SVG.getFromResource(getContext(), resourceId); setSoftwareLayerType(); Drawable drawable = new PictureDrawable(svg.renderToPicture()); if (cache) { cacheDrawable(drawable); } setImageDrawable(drawable); } } catch (SVGParseException e) { Log.w("SVGImageView", "Unable to find resource: " + resourceId, e); } } /** * Load an SVG image from the given resource URI. */ @Override public void setImageURI(Uri uri) { internalSetImageURI(uri); } public void setImageAsset(String filename, boolean _cache) // Method call when one wants to use an asset and enable caching along with it { cache = _cache; key = filename; // Since a different asset may have been specified we update the 'key' associate with this View setImageAsset(filename); } /** * Load an SVG image from the given asset filename. */ public void setImageAsset(String filename) { try { if (cache && mapCache.containsKey(key)) // If cache is set and mapCache contains the key used we pull the drawable from the cache to use rather than from the svg { setDrawableFromCache(); } else { SVG svg = SVG.getFromAsset(getContext().getAssets(), filename); setSoftwareLayerType(); Drawable drawable = new PictureDrawable(svg.renderToPicture()); if (cache) { cacheDrawable(drawable); } setImageDrawable(drawable); } } catch (Exception e) { Log.w("SVGImageView", "Unable to find asset file: " + filename, e); } } /* * Attempt to set a picture from a Uri. Return true if it worked. */ private boolean internalSetImageURI(Uri uri) { InputStream is = null; try { if (cache && mapCache.containsKey(key)) { setDrawableFromCache(); } else { is = getContext().getContentResolver().openInputStream(uri); SVG svg = SVG.getFromInputStream(is); setSoftwareLayerType(); Drawable drawable = new PictureDrawable(svg.renderToPicture()); if (cache) { cacheDrawable(drawable); } setImageDrawable(drawable); } return true; } catch (FileNotFoundException e) { return false; } catch (Exception e) { Log.w("ImageView", "Unable to open content: " + uri, e); return false; } finally { try { if (is != null) is.close(); } catch (IOException e) { /* do nothing */ } } } private void cacheDrawable(Drawable drawable) { mapCache.put(key, drawable); } private void setDrawableFromCache() { Drawable drawable = mapCache.get(key); setSoftwareLayerType(); setImageDrawable(drawable); } /* * Use reflection to call an API 11 method from this library (which is configured with a minSdkVersion of 8) */ private void setSoftwareLayerType() { if (setLayerTypeMethod == null) return; try { int LAYER_TYPE_SOFTWARE = View.class.getField("LAYER_TYPE_SOFTWARE").getInt(new View(getContext())); // Abid Edit: Added this line for API < 10 since View.LAYER_TYPE_SOFTWARE was added in API 11 setLayerTypeMethod.invoke(this, LAYER_TYPE_SOFTWARE, null); } catch (Exception e) { Log.w("SVGImageView", "Unexpected failure calling setLayerType", e); } } }