pt 1 in reviving the android build (copied from pm 28a1, wish me luck)

mobile/android/thirdparty/com/squareup/picasso/RequestCreator.java

@@ -0,0 +1,374 @@
+/*
+ * Copyright (C) 2013 Square, Inc.
+ *
+ * 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.squareup.picasso;
+
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.widget.ImageView;
+import java.io.IOException;
+
+import static com.squareup.picasso.BitmapHunter.forRequest;
+import static com.squareup.picasso.Picasso.LoadedFrom.MEMORY;
+import static com.squareup.picasso.Utils.checkNotMain;
+import static com.squareup.picasso.Utils.createKey;
+
+/** Fluent API for building an image download request. */
+@SuppressWarnings("UnusedDeclaration") // Public API.
+public class RequestCreator {
+  private final Picasso picasso;
+  private final Request.Builder data;
+
+  private boolean skipMemoryCache;
+  private boolean noFade;
+  private boolean deferred;
+  private int placeholderResId;
+  private Drawable placeholderDrawable;
+  private int errorResId;
+  private Drawable errorDrawable;
+
+  RequestCreator(Picasso picasso, Uri uri, int resourceId) {
+    if (picasso.shutdown) {
+      throw new IllegalStateException(
+          "Picasso instance already shut down. Cannot submit new requests.");
+    }
+    this.picasso = picasso;
+    this.data = new Request.Builder(uri, resourceId);
+  }
+
+  /**
+   * A placeholder drawable to be used while the image is being loaded. If the requested image is
+   * not immediately available in the memory cache then this resource will be set on the target
+   * {@link ImageView}.
+   */
+  public RequestCreator placeholder(int placeholderResId) {
+    if (placeholderResId == 0) {
+      throw new IllegalArgumentException("Placeholder image resource invalid.");
+    }
+    if (placeholderDrawable != null) {
+      throw new IllegalStateException("Placeholder image already set.");
+    }
+    this.placeholderResId = placeholderResId;
+    return this;
+  }
+
+  /**
+   * A placeholder drawable to be used while the image is being loaded. If the requested image is
+   * not immediately available in the memory cache then this resource will be set on the target
+   * {@link ImageView}.
+   * <p>
+   * If you are not using a placeholder image but want to clear an existing image (such as when
+   * used in an {@link android.widget.Adapter adapter}), pass in {@code null}.
+   */
+  public RequestCreator placeholder(Drawable placeholderDrawable) {
+    if (placeholderResId != 0) {
+      throw new IllegalStateException("Placeholder image already set.");
+    }
+    this.placeholderDrawable = placeholderDrawable;
+    return this;
+  }
+
+  /** An error drawable to be used if the request image could not be loaded. */
+  public RequestCreator error(int errorResId) {
+    if (errorResId == 0) {
+      throw new IllegalArgumentException("Error image resource invalid.");
+    }
+    if (errorDrawable != null) {
+      throw new IllegalStateException("Error image already set.");
+    }
+    this.errorResId = errorResId;
+    return this;
+  }
+
+  /** An error drawable to be used if the request image could not be loaded. */
+  public RequestCreator error(Drawable errorDrawable) {
+    if (errorDrawable == null) {
+      throw new IllegalArgumentException("Error image may not be null.");
+    }
+    if (errorResId != 0) {
+      throw new IllegalStateException("Error image already set.");
+    }
+    this.errorDrawable = errorDrawable;
+    return this;
+  }
+
+  /**
+   * Attempt to resize the image to fit exactly into the target {@link ImageView}'s bounds. This
+   * will result in delayed execution of the request until the {@link ImageView} has been measured.
+   * <p/>
+   * <em>Note:</em> This method works only when your target is an {@link ImageView}.
+   */
+  public RequestCreator fit() {
+    deferred = true;
+    return this;
+  }
+
+  /** Internal use only. Used by {@link DeferredRequestCreator}. */
+  RequestCreator unfit() {
+    deferred = false;
+    return this;
+  }
+
+  /** Resize the image to the specified dimension size. */
+  public RequestCreator resizeDimen(int targetWidthResId, int targetHeightResId) {
+    Resources resources = picasso.context.getResources();
+    int targetWidth = resources.getDimensionPixelSize(targetWidthResId);
+    int targetHeight = resources.getDimensionPixelSize(targetHeightResId);
+    return resize(targetWidth, targetHeight);
+  }
+
+  /** Resize the image to the specified size in pixels. */
+  public RequestCreator resize(int targetWidth, int targetHeight) {
+    data.resize(targetWidth, targetHeight);
+    return this;
+  }
+
+  /**
+   * Crops an image inside of the bounds specified by {@link #resize(int, int)} rather than
+   * distorting the aspect ratio. This cropping technique scales the image so that it fills the
+   * requested bounds and then crops the extra.
+   */
+  public RequestCreator centerCrop() {
+    data.centerCrop();
+    return this;
+  }
+
+  /**
+   * Centers an image inside of the bounds specified by {@link #resize(int, int)}. This scales
+   * the image so that both dimensions are equal to or less than the requested bounds.
+   */
+  public RequestCreator centerInside() {
+    data.centerInside();
+    return this;
+  }
+
+  /** Rotate the image by the specified degrees. */
+  public RequestCreator rotate(float degrees) {
+    data.rotate(degrees);
+    return this;
+  }
+
+  /** Rotate the image by the specified degrees around a pivot point. */
+  public RequestCreator rotate(float degrees, float pivotX, float pivotY) {
+    data.rotate(degrees, pivotX, pivotY);
+    return this;
+  }
+
+  /**
+   * Add a custom transformation to be applied to the image.
+   * <p/>
+   * Custom transformations will always be run after the built-in transformations.
+   */
+  // TODO show example of calling resize after a transform in the javadoc
+  public RequestCreator transform(Transformation transformation) {
+    data.transform(transformation);
+    return this;
+  }
+
+  /**
+   * Indicate that this action should not use the memory cache for attempting to load or save the
+   * image. This can be useful when you know an image will only ever be used once (e.g., loading
+   * an image from the filesystem and uploading to a remote server).
+   */
+  public RequestCreator skipMemoryCache() {
+    skipMemoryCache = true;
+    return this;
+  }
+
+  /** Disable brief fade in of images loaded from the disk cache or network. */
+  public RequestCreator noFade() {
+    noFade = true;
+    return this;
+  }
+
+  /** Synchronously fulfill this request. Must not be called from the main thread. */
+  public Bitmap get() throws IOException {
+    checkNotMain();
+    if (deferred) {
+      throw new IllegalStateException("Fit cannot be used with get.");
+    }
+    if (!data.hasImage()) {
+      return null;
+    }
+
+    Request finalData = picasso.transformRequest(data.build());
+    String key = createKey(finalData);
+
+    Action action = new GetAction(picasso, finalData, skipMemoryCache, key);
+    return forRequest(picasso.context, picasso, picasso.dispatcher, picasso.cache, picasso.stats,
+        action, picasso.dispatcher.downloader).hunt();
+  }
+
+  /**
+   * Asynchronously fulfills the request without a {@link ImageView} or {@link Target}. This is
+   * useful when you want to warm up the cache with an image.
+   */
+  public void fetch() {
+    if (deferred) {
+      throw new IllegalStateException("Fit cannot be used with fetch.");
+    }
+    if (data.hasImage()) {
+      Request finalData = picasso.transformRequest(data.build());
+      String key = createKey(finalData);
+
+      Action action = new FetchAction(picasso, finalData, skipMemoryCache, key);
+      picasso.enqueueAndSubmit(action);
+    }
+  }
+
+  /**
+   * Asynchronously fulfills the request into the specified {@link Target}. In most cases, you
+   * should use this when you are dealing with a custom {@link android.view.View View} or view
+   * holder which should implement the {@link Target} interface.
+   * <p>
+   * Implementing on a {@link android.view.View View}:
+   * <blockquote><pre>
+   * public class ProfileView extends FrameLayout implements Target {
+   *   {@literal @}Override public void onBitmapLoaded(Bitmap bitmap, LoadedFrom from) {
+   *     setBackgroundDrawable(new BitmapDrawable(bitmap));
+   *   }
+   *
+   *   {@literal @}Override public void onBitmapFailed() {
+   *     setBackgroundResource(R.drawable.profile_error);
+   *   }
+   * }
+   * </pre></blockquote>
+   * Implementing on a view holder object for use inside of an adapter:
+   * <blockquote><pre>
+   * public class ViewHolder implements Target {
+   *   public FrameLayout frame;
+   *   public TextView name;
+   *
+   *   {@literal @}Override public void onBitmapLoaded(Bitmap bitmap, LoadedFrom from) {
+   *     frame.setBackgroundDrawable(new BitmapDrawable(bitmap));
+   *   }
+   *
+   *   {@literal @}Override public void onBitmapFailed() {
+   *     frame.setBackgroundResource(R.drawable.profile_error);
+   *   }
+   * }
+   * </pre></blockquote>
+   * <p>
+   * <em>Note:</em> This method keeps a weak reference to the {@link Target} instance and will be
+   * garbage collected if you do not keep a strong reference to it. To receive callbacks when an
+   * image is loaded use {@link #into(android.widget.ImageView, Callback)}.
+   */
+  public void into(Target target) {
+    if (target == null) {
+      throw new IllegalArgumentException("Target must not be null.");
+    }
+    if (deferred) {
+      throw new IllegalStateException("Fit cannot be used with a Target.");
+    }
+
+    Drawable drawable =
+        placeholderResId != 0 ? picasso.context.getResources().getDrawable(placeholderResId)
+            : placeholderDrawable;
+
+    if (!data.hasImage()) {
+      picasso.cancelRequest(target);
+      target.onPrepareLoad(drawable);
+      return;
+    }
+
+    Request finalData = picasso.transformRequest(data.build());
+    String requestKey = createKey(finalData);
+
+    if (!skipMemoryCache) {
+      Bitmap bitmap = picasso.quickMemoryCacheCheck(requestKey);
+      if (bitmap != null) {
+        picasso.cancelRequest(target);
+        target.onBitmapLoaded(bitmap, MEMORY);
+        return;
+      }
+    }
+
+    target.onPrepareLoad(drawable);
+
+    Action action = new TargetAction(picasso, target, finalData, skipMemoryCache, requestKey);
+    picasso.enqueueAndSubmit(action);
+  }
+
+  /**
+   * Asynchronously fulfills the request into the specified {@link ImageView}.
+   * <p/>
+   * <em>Note:</em> This method keeps a weak reference to the {@link ImageView} instance and will
+   * automatically support object recycling.
+   */
+  public void into(ImageView target) {
+    into(target, null);
+  }
+
+  /**
+   * Asynchronously fulfills the request into the specified {@link ImageView} and invokes the
+   * target {@link Callback} if it's not {@code null}.
+   * <p/>
+   * <em>Note:</em> The {@link Callback} param is a strong reference and will prevent your
+   * {@link android.app.Activity} or {@link android.app.Fragment} from being garbage collected. If
+   * you use this method, it is <b>strongly</b> recommended you invoke an adjacent
+   * {@link Picasso#cancelRequest(android.widget.ImageView)} call to prevent temporary leaking.
+   */
+  public void into(ImageView target, Callback callback) {
+    if (target == null) {
+      throw new IllegalArgumentException("Target must not be null.");
+    }
+
+    if (!data.hasImage()) {
+      picasso.cancelRequest(target);
+      PicassoDrawable.setPlaceholder(target, placeholderResId, placeholderDrawable);
+      return;
+    }
+
+    if (deferred) {
+      if (data.hasSize()) {
+        throw new IllegalStateException("Fit cannot be used with resize.");
+      }
+      int measuredWidth = target.getMeasuredWidth();
+      int measuredHeight = target.getMeasuredHeight();
+      if (measuredWidth == 0 || measuredHeight == 0) {
+        PicassoDrawable.setPlaceholder(target, placeholderResId, placeholderDrawable);
+        picasso.defer(target, new DeferredRequestCreator(this, target, callback));
+        return;
+      }
+      data.resize(measuredWidth, measuredHeight);
+    }
+
+    Request finalData = picasso.transformRequest(data.build());
+    String requestKey = createKey(finalData);
+
+    if (!skipMemoryCache) {
+      Bitmap bitmap = picasso.quickMemoryCacheCheck(requestKey);
+      if (bitmap != null) {
+        picasso.cancelRequest(target);
+        PicassoDrawable.setBitmap(target, picasso.context, bitmap, MEMORY, noFade,
+            picasso.debugging);
+        if (callback != null) {
+          callback.onSuccess();
+        }
+        return;
+      }
+    }
+
+    PicassoDrawable.setPlaceholder(target, placeholderResId, placeholderDrawable);
+
+    Action action =
+        new ImageViewAction(picasso, target, finalData, skipMemoryCache, noFade, errorResId,
+            errorDrawable, requestKey, callback);
+
+    picasso.enqueueAndSubmit(action);
+  }
+}