Add support for Android spellcheck menu in Chrome/WebViews

content/public/android/java/src/org/chromium/content/browser/input/TextSuggestionHost.java

Index: content/public/android/java/src/org/chromium/content/browser/input/TextSuggestionHost.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/input/TextSuggestionHost.java b/content/public/android/java/src/org/chromium/content/browser/input/TextSuggestionHost.java
new file mode 100644
index 0000000000000000000000000000000000000000..4f5c5293276a3675a5d8e947598de3a24fc92c25
--- /dev/null
+++ b/content/public/android/java/src/org/chromium/content/browser/input/TextSuggestionHost.java
@@ -0,0 +1,123 @@
+// Copyright 2017 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.content.browser.input;
+
+import android.content.Context;
+import android.view.View;
+
+import org.chromium.base.VisibleForTesting;
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.base.annotations.JNINamespace;
+import org.chromium.content.browser.RenderCoordinates;
+import org.chromium.content.browser.WindowAndroidProvider;
+import org.chromium.content_public.browser.WebContents;
+
+/**
+ * Handles displaying the Android spellcheck/text suggestion menu (provided by
+ * SuggestionsPopupWindow) when requested by the C++ class TextSuggestionHostAndroid and applying
+ * the commands in that menu (by calling back to the C++ class).
+ */
+@JNINamespace("content")
+public class TextSuggestionHost {
+    private long mNativeTextSuggestionHost;
+    private final Context mContext;
+    private final WebContents mWebContents;
+    private final View mContainerView;
+    private final WindowAndroidProvider mWindowAndroidProvider;
+    private final RenderCoordinates mRenderCoordinates;
+
+    private SuggestionsPopupWindow mSuggestionsPopupWindow;
+
+    public TextSuggestionHost(Context context, WebContents webContents, View containerView,
+            WindowAndroidProvider windowAndroidProvider, RenderCoordinates renderCoordinates) {
+        mContext = context;
+        mWebContents = webContents;
+        mContainerView = containerView;
+        mWindowAndroidProvider = windowAndroidProvider;
+        mRenderCoordinates = renderCoordinates;
+
+        mNativeTextSuggestionHost = nativeInit(webContents);
+    }
+
+    @CalledByNative
+    private void showSpellCheckSuggestionMenu(
+            double caretX, double caretY, String markedText, String[] suggestions) {
+        if (mSuggestionsPopupWindow == null) {
+            mSuggestionsPopupWindow = new SuggestionsPopupWindow(
+                    mContext, this, mContainerView, mWindowAndroidProvider);
+        }
+
+        mSuggestionsPopupWindow.setHighlightedText(markedText);
+        mSuggestionsPopupWindow.setSpellCheckSuggestions(suggestions);
+
+        float density = mRenderCoordinates.getDeviceScaleFactor();
+        mSuggestionsPopupWindow.show(
+                density * caretX, density * caretY + mRenderCoordinates.getContentOffsetYPix());
+    }
+
+    /**
+     * Hides the text suggestion menu (and informs Blink that it was closed).
+     */
+    @CalledByNative
+    public void hidePopups() {
+        if (mSuggestionsPopupWindow != null && mSuggestionsPopupWindow.isShowing()) {
+            mSuggestionsPopupWindow.dismiss();
+            mSuggestionsPopupWindow = null;
+        }
+    }
+
+    /**
+     * Tells Blink to replace the active suggestion range with the specified replacement.
+     */
+    public void applySpellCheckSuggestion(String suggestion) {
+        nativeApplySpellCheckSuggestion(mNativeTextSuggestionHost, suggestion);
+    }
+
+    /**
+     * Tells Blink to delete the active suggestion range.
+     */
+    public void deleteActiveSuggestionRange() {
+        nativeDeleteActiveSuggestionRange(mNativeTextSuggestionHost);
+    }
+
+    /**
+     * Tells Blink to remove spelling markers under all instances of the specified word.
+     */
+    public void newWordAddedToDictionary(String word) {
+        nativeNewWordAddedToDictionary(mNativeTextSuggestionHost, word);
+    }
+
+    /**
+     * Tells Blink the suggestion menu was closed (and also clears the reference to the
+     * SuggestionsPopupWindow instance so it can be garbage collected).
+     */
+    public void suggestionMenuClosed(boolean dismissedByItemTap) {
+        if (!dismissedByItemTap) {
+            nativeSuggestionMenuClosed(mNativeTextSuggestionHost);
+        }
+        mSuggestionsPopupWindow = null;
+    }
+
+    @CalledByNative
+    private void destroy() {
+        mNativeTextSuggestionHost = 0;
+    }
+
+    /**
+     * @return The SuggestionsPopupWindow, if one exists.
+     */
+    @VisibleForTesting
+    public SuggestionsPopupWindow getSuggestionsPopupWindowForTesting() {
+        return mSuggestionsPopupWindow;
+    }
+
+    private native long nativeInit(WebContents webContents);
+    private native void nativeApplySpellCheckSuggestion(
+            long nativeTextSuggestionHostAndroid, String suggestion);
+    private native void nativeDeleteActiveSuggestionRange(long nativeTextSuggestionHostAndroid);
+    private native void nativeNewWordAddedToDictionary(
+            long nativeTextSuggestionHostAndroid, String word);
+    private native void nativeSuggestionMenuClosed(long nativeTextSuggestionHostAndroid);
+}