[Contextual Search] Animate thumbnail appearance

chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/contextualsearch/ContextualSearchImageControl.java

Index: chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/contextualsearch/ContextualSearchImageControl.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/contextualsearch/ContextualSearchImageControl.java b/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/contextualsearch/ContextualSearchImageControl.java
new file mode 100644
index 0000000000000000000000000000000000000000..e2f24f919c82a9f714f6427260b7226de6869112
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/contextualsearch/ContextualSearchImageControl.java
@@ -0,0 +1,205 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+package org.chromium.chrome.browser.compositor.bottombar.contextualsearch;
+
+import android.content.Context;
+import android.support.v4.view.animation.PathInterpolatorCompat;
+import android.text.TextUtils;
+import android.view.animation.Interpolator;
+
+import org.chromium.chrome.R;
+import org.chromium.chrome.browser.compositor.bottombar.OverlayPanelAnimation;
+import org.chromium.chrome.browser.compositor.layouts.ChromeAnimation;
+
+/**
+ * Controls the image shown in the Bar. Owns the {@link ContextualSearchIconSpriteControl} and
+ * details about the thumbnail, and handles animating between the two.
+ */
+public class ContextualSearchImageControl
+        implements ChromeAnimation.Animatable<ContextualSearchImageControl.AnimationType> {
+    /**
+      * Animation properties.
+      */
+    protected enum AnimationType {
+        THUMBNAIL_VISIBILITY
+    }
+
+    /** The current context. */
+    private final Context mContext;
+
+    /** The OverlayPanelAnimation used to add animations. */
+    private final OverlayPanelAnimation mOverlayPanelAnimation;
+
+    public ContextualSearchImageControl(OverlayPanelAnimation overlayPanelAnimation,
+            Context context) {
+        mContext = context;
+        mOverlayPanelAnimation = overlayPanelAnimation;
+    }
+
+    // ============================================================================================
+    // Search Provider Icon Sprite
+    // ============================================================================================
+
+    private ContextualSearchIconSpriteControl mIconSpriteControl;
+
+    /**
+     * @return The {@link ContextualSearchIconSpriteControl} for the panel.
+     */
+    public ContextualSearchIconSpriteControl getIconSpriteControl() {
+        if (mIconSpriteControl == null) {
+            mIconSpriteControl =
+                    new ContextualSearchIconSpriteControl(mOverlayPanelAnimation, mContext);
+        }
+        return mIconSpriteControl;
+    }
+
+    /**
+     * @param shouldAnimateIconSprite Whether the search provider icon sprite should be animated.
+     */
+    public void setShouldAnimateIconSprite(boolean shouldAnimateIconSprite) {
+        getIconSpriteControl().setShouldAnimateAppearance(shouldAnimateIconSprite);
+    }
+
+    // ============================================================================================
+    // Thumbnail
+    // ============================================================================================
+
+    /**
+     * The URL of the thumbnail to display.
+     */
+    private String mThumbnailUrl;
+
+    /**
+     * The height and width of the thumbnail.
+     */
+    private int mThumbnailSize;
+
+    /**
+     * Whether the thumbnail is visible.
+     */
+    private boolean mThumbnailVisible;
+
+    /**
+     * The thumbnail visibility percentage, which dictates how and where to draw the thumbnail.
+     * The thumbnail is not visible at all at 0.f and completely visible at 1.f.
+     */
+    private float mThumbnailVisibilityPercentage = 0.f;
+
+    /**
+     * @param thumbnailUrl The URL of the thumbnail to display
+     */
+    public void setThumbnailUrl(String thumbnailUrl) {
+        mThumbnailUrl = thumbnailUrl;
+    }
+
+    /**
+     * @return The URL used to fetch a thumbnail to display in the Bar. Will return an empty string
+     *         if no thumbnail is available.
+     */
+    public String getThumbnailUrl() {
+        return mThumbnailUrl != null ? mThumbnailUrl : "";
+    }
+
+    /**
+     * Hides the thumbnail if it is visible and makes the icon sprite visible. Also resets the
+     * thumbnail URL.
+     * @param animate Whether hiding the thumbnail should be animated.
+     */
+    public void hideThumbnail(boolean animate) {
+        getIconSpriteControl().setIsVisible(true);
+        if (mThumbnailVisible && animate) {
+            animateThumbnailVisibility(false);
+        } else {
+            mOverlayPanelAnimation.cancelAnimation(this, AnimationType.THUMBNAIL_VISIBILITY);
+            onThumbnailHidden();
+        }
+    }
+
+    /**
+     * @return The height and width of the thumbnail in px.
+     */
+    public int getThumbnailSize() {
+        if (mThumbnailSize == 0) {
+            mThumbnailSize = mContext.getResources().getDimensionPixelSize(
+                    R.dimen.contextual_search_thumbnail_size);
+        }
+        return mThumbnailSize;
+    }
+
+    /**
+     * @return Whether the thumbnail is visible.
+     */
+    public boolean getThumbnailVisible() {
+        return mThumbnailVisible;
+    }
+
+    /**
+     * @return The thumbnail visibility percentage, which dictates how and where to draw the
+     *         thumbnail. The thumbnail is not visible at all at 0.f and completely visible at 1.f.
+     */
+    public float getThumbnailVisibilityPercentage() {
+        return mThumbnailVisibilityPercentage;
+    }
+
+    /**
+     * Called when the thumbnail has finished being fetched.
+     * @param success Whether fetching the thumbnail was successful.
+     */
+    public void onThumbnailFetched(boolean success) {
+        // Check if the thumbnail URL was cleared before the thumbnail fetch completed. This may
+        // occur if the user taps to refine the search.
+        mThumbnailVisible = success && !TextUtils.isEmpty(mThumbnailUrl);
+        if (!mThumbnailVisible) return;
+
+        // TODO(twellington): if the icon sprite is animating wait to start the thumbnail visibility
+        //                    animation.
+        animateThumbnailVisibility(true);
+    }
+
+    private void onThumbnailHidden() {
+        mThumbnailUrl = "";
+        mThumbnailVisible = false;
+        getIconSpriteControl().setIsVisible(true);
+        mThumbnailVisibilityPercentage = 0.f;
+    }
+
+    // ============================================================================================
+    // Thumbnail Animation
+    // ============================================================================================
+
+    private Interpolator mThumbnailVisibilityInterpolator;
+
+    private void animateThumbnailVisibility(boolean visible) {
+        if (mThumbnailVisibilityInterpolator == null) {
+            mThumbnailVisibilityInterpolator = PathInterpolatorCompat.create(0.4f, 0.f, 0.6f, 1.f);
+        }
+
+        mOverlayPanelAnimation.cancelAnimation(this, AnimationType.THUMBNAIL_VISIBILITY);
+
+        float endValue = visible ? 1.f : 0.f;
+        mOverlayPanelAnimation.addToAnimation(this, AnimationType.THUMBNAIL_VISIBILITY,
+                mThumbnailVisibilityPercentage, endValue,
+                OverlayPanelAnimation.BASE_ANIMATION_DURATION_MS, 0, false,
+                mThumbnailVisibilityInterpolator);
+    }
+
+    @Override
+    public void setProperty(AnimationType prop, float val) {
+        if (prop == AnimationType.THUMBNAIL_VISIBILITY) {
+            mThumbnailVisibilityPercentage = val;
+        }
+    }
+
+    @Override
+    public void onPropertyAnimationFinished(AnimationType prop) {
+        if (prop == AnimationType.THUMBNAIL_VISIBILITY) {
+            if (mThumbnailVisibilityPercentage == 0.f) {
+                onThumbnailHidden();
+            } else {
+                getIconSpriteControl().setIsVisible(false);
+            }
+        }
+    }
+
+}